zoneminder/src/zm_image.cpp

//
// ZoneMinder Image Class Implementation, $Date$, $Revision$
// Copyright (C) 2001-2008 Philip Coombes
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
// 
#include "zm.h"
#include "zm_font.h"
#include "zm_bigfont.h"
#include "zm_image.h"
#include "zm_utils.h"
#include "zm_rgb.h"

#include <sys/stat.h>
#include <errno.h>

static unsigned char y_table_global[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 78, 79, 80, 81, 82, 83, 85, 86, 87, 88, 89, 90, 91, 93, 94, 95, 96, 97, 98, 100, 101, 102, 103, 104, 105, 107, 108, 109, 110, 111, 112, 114, 115, 116, 117, 118, 119, 121, 122, 123, 124, 125, 126, 128, 129, 130, 131, 132, 133, 135, 136, 137, 138, 139, 140, 142, 143, 144, 145, 146, 147, 149, 150, 151, 152, 153, 154, 156, 157, 158, 159, 160, 161, 163, 164, 165, 166, 167, 168, 170, 171, 172, 173, 174, 175, 176, 178, 179, 180, 181, 182, 183, 185, 186, 187, 188, 189, 190, 192, 193, 194, 195, 196, 197, 199, 200, 201, 202, 203, 204, 206, 207, 208, 209, 210, 211, 213, 214, 215, 216, 217, 218, 220, 221, 222, 223, 224, 225, 227, 228, 229, 230, 231, 232, 234, 235, 236, 237, 238, 239, 241, 242, 243, 244, 245, 246, 248, 249, 250, 251, 252, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255};

static signed char uv_table_global[] = {-127, -127, -127, -127, -127, -127, -127, -127, -127, -127, -127, -127, -127, -127, -127, -127, -127, -125, -124, -123, -122, -121, -120, -119, -117, -116, -115, -114, -113, -112, -111, -109, -108, -107, -106, -105, -104, -103, -102, -100, -99, -98, -97, -96, -95, -94, -92, -91, -90, -89, -88, -87, -86, -85, -83, -82, -81, -80, -79, -78, -77, -75, -74, -73, -72, -71, -70, -69, -68, -66, -65, -64, -63, -62, -61, -60, -58, -57, -56, -55, -54, -53, -52, -51, -49, -48, -47, -46, -45, -44, -43, -41, -40, -39, -38, -37, -36, -35, -34, -32, -31, -30, -29, -28, -27, -26, -24, -23, -22, -21, -20, -19, -18, -17, -15, -14, -13, -12, -11, -10, -9, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 57, 58, 60, 61, 62, 63, 64, 65, 66, 68, 69, 70, 71, 72, 73, 74, 75, 77, 78, 79, 80, 81, 82, 83, 85, 86, 87, 88, 89, 90, 91, 92, 94, 95, 96, 97, 98, 99, 100, 102, 103, 104, 105, 106, 107, 108, 109, 111, 112, 113, 114, 115, 116, 117, 119, 120, 121, 122, 123, 124, 125, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127};

static short r_v_table_global[] = {-179, -178, -176, -175, -173, -172, -171, -169, -168, -166, -165, -164, -162, -161, -159, -158, -157, -155, -154, -152, -151, -150, -148, -147, -145, -144, -143, -141, -140, -138, -137, -135, -134, -133, -131, -130, -128, -127, -126, -124, -123, -121, -120, -119, -117, -116, -114, -113, -112, -110, -109, -107, -106, -105, -103, -102, -100, -99, -98, -96, -95, -93, -92, -91, -89, -88, -86, -85, -84, -82, -81, -79, -78, -77, -75, -74, -72, -71, -70, -68, -67, -65, -64, -63, -61, -60, -58, -57, -56, -54, -53, -51, -50, -49, -47, -46, -44, -43, -42, -40, -39, -37, -36, -35, -33, -32, -30, -29, -28, -26, -25, -23, -22, -21, -19, -18, -16, -15, -14, -12, -11, -9, -8, -7, -5, -4, -2, -1, 0, 1, 2, 4, 5, 7, 8, 9, 11, 12, 14, 15, 16, 18, 19, 21, 22, 23, 25, 26, 28, 29, 30, 32, 33, 35, 36, 37, 39, 40, 42, 43, 44, 46, 47, 49, 50, 51, 53, 54, 56, 57, 58, 60, 61, 63, 64, 65, 67, 68, 70, 71, 72, 74, 75, 77, 78, 79, 81, 82, 84, 85, 86, 88, 89, 91, 92, 93, 95, 96, 98, 99, 100, 102, 103, 105, 106, 107, 109, 110, 112, 113, 114, 116, 117, 119, 120, 121, 123, 124, 126, 127, 128, 130, 131, 133, 134, 135, 137, 138, 140, 141, 143, 144, 145, 147, 148, 150, 151, 152, 154, 155, 157, 158, 159, 161, 162, 164, 165, 166, 168, 169, 171, 172, 173, 175, 176};

static short g_u_table_global[] = {-44, -43, -43, -43, -42, -42, -41, -41, -41, -40, -40, -40, -39, -39, -39, -38, -38, -38, -37, -37, -37, -36, -36, -36, -35, -35, -35, -34, -34, -34, -33, -33, -33, -32, -32, -31, -31, -31, -30, -30, -30, -29, -29, -29, -28, -28, -28, -27, -27, -27, -26, -26, -26, -25, -25, -25, -24, -24, -24, -23, -23, -23, -22, -22, -22, -21, -21, -20, -20, -20, -19, -19, -19, -18, -18, -18, -17, -17, -17, -16, -16, -16, -15, -15, -15, -14, -14, -14, -13, -13, -13, -12, -12, -12, -11, -11, -11, -10, -10, -9, -9, -9, -8, -8, -8, -7, -7, -7, -6, -6, -6, -5, -5, -5, -4, -4, -4, -3, -3, -3, -2, -2, -2, -1, -1, -1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 20, 21, 21, 22, 22, 22, 23, 23, 23, 24, 24, 24, 25, 25, 25, 26, 26, 26, 27, 27, 27, 28, 28, 28, 29, 29, 29, 30, 30, 30, 31, 31, 31, 32, 32, 33, 33, 33, 34, 34, 34, 35, 35, 35, 36, 36, 36, 37, 37, 37, 38, 38, 38, 39, 39, 39, 40, 40, 40, 41, 41, 41, 42, 42, 43, 43};

static short g_v_table_global[] = {-91, -90, -89, -89, -88, -87, -87, -86, -85, -84, -84, -83, -82, -82, -81, -80, -79, -79, -78, -77, -77, -76, -75, -74, -74, -73, -72, -72, -71, -70, -69, -69, -68, -67, -67, -66, -65, -64, -64, -63, -62, -62, -61, -60, -59, -59, -58, -57, -57, -56, -55, -54, -54, -53, -52, -52, -51, -50, -49, -49, -48, -47, -47, -46, -45, -44, -44, -43, -42, -42, -41, -40, -39, -39, -38, -37, -37, -36, -35, -34, -34, -33, -32, -32, -31, -30, -29, -29, -28, -27, -27, -26, -25, -24, -24, -23, -22, -22, -21, -20, -19, -19, -18, -17, -17, -16, -15, -14, -14, -13, -12, -12, -11, -10, -9, -9, -8, -7, -7, -6, -5, -4, -4, -3, -2, -2, -1, 0, 0, 0, 1, 2, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 9, 10, 11, 12, 12, 13, 14, 14, 15, 16, 17, 17, 18, 19, 19, 20, 21, 22, 22, 23, 24, 24, 25, 26, 27, 27, 28, 29, 29, 30, 31, 32, 32, 33, 34, 34, 35, 36, 37, 37, 38, 39, 39, 40, 41, 42, 42, 43, 44, 44, 45, 46, 47, 47, 48, 49, 49, 50, 51, 52, 52, 53, 54, 54, 55, 56, 57, 57, 58, 59, 59, 60, 61, 62, 62, 63, 64, 64, 65, 66, 67, 67, 68, 69, 69, 70, 71, 72, 72, 73, 74, 74, 75, 76, 77, 77, 78, 79, 79, 80, 81, 82, 82, 83, 84, 84, 85, 86, 87, 87, 88, 89, 89};

static short b_u_table_global[] = {-226, -225, -223, -221, -219, -217, -216, -214, -212, -210, -209, -207, -205, -203, -202, -200, -198, -196, -194, -193, -191, -189, -187, -186, -184, -182, -180, -178, -177, -175, -173, -171, -170, -168, -166, -164, -163, -161, -159, -157, -155, -154, -152, -150, -148, -147, -145, -143, -141, -139, -138, -136, -134, -132, -131, -129, -127, -125, -124, -122, -120, -118, -116, -115, -113, -111, -109, -108, -106, -104, -102, -101, -99, -97, -95, -93, -92, -90, -88, -86, -85, -83, -81, -79, -77, -76, -74, -72, -70, -69, -67, -65, -63, -62, -60, -58, -56, -54, -53, -51, -49, -47, -46, -44, -42, -40, -38, -37, -35, -33, -31, -30, -28, -26, -24, -23, -21, -19, -17, -15, -14, -12, -10, -8, -7, -5, -3, -1, 0, 1, 3, 5, 7, 8, 10, 12, 14, 15, 17, 19, 21, 23, 24, 26, 28, 30, 31, 33, 35, 37, 38, 40, 42, 44, 46, 47, 49, 51, 53, 54, 56, 58, 60, 62, 63, 65, 67, 69, 70, 72, 74, 76, 77, 79, 81, 83, 85, 86, 88, 90, 92, 93, 95, 97, 99, 101, 102, 104, 106, 108, 109, 111, 113, 115, 116, 118, 120, 122, 124, 125, 127, 129, 131, 132, 134, 136, 138, 139, 141, 143, 145, 147, 148, 150, 152, 154, 155, 157, 159, 161, 163, 164, 166, 168, 170, 171, 173, 175, 177, 178, 180, 182, 184, 186, 187, 189, 191, 193, 194, 196, 198, 200, 202, 203, 205, 207, 209, 210, 212, 214, 216, 217, 219, 221, 223};

bool Image::initialised = false;
static unsigned char *y_table;
static signed char *uv_table;
static short *r_v_table;
static short *g_v_table;
static short *g_u_table;
static short *b_u_table;
__attribute__((aligned(16))) static const uint8_t movemask[16] = {0,4,8,12,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};

jpeg_compress_struct *Image::writejpg_ccinfo[101] = { 0 };
jpeg_compress_struct *Image::encodejpg_ccinfo[101] = { 0 };
jpeg_decompress_struct *Image::readjpg_dcinfo = 0;
jpeg_decompress_struct *Image::decodejpg_dcinfo = 0;
struct zm_error_mgr Image::jpg_err;

/* Pointer to blend function. */
static blend_fptr_t fptr_blend;

/* Pointer to delta8 functions */
static delta_fptr_t fptr_delta8_rgb;
static delta_fptr_t fptr_delta8_bgr;
static delta_fptr_t fptr_delta8_rgba;
static delta_fptr_t fptr_delta8_bgra;
static delta_fptr_t fptr_delta8_argb;
static delta_fptr_t fptr_delta8_abgr;
static delta_fptr_t fptr_delta8_gray8;

/* Pointers to deinterlace_4field functions */
static deinterlace_4field_fptr_t fptr_deinterlace_4field_rgba;
static deinterlace_4field_fptr_t fptr_deinterlace_4field_bgra;
static deinterlace_4field_fptr_t fptr_deinterlace_4field_argb;
static deinterlace_4field_fptr_t fptr_deinterlace_4field_abgr;
static deinterlace_4field_fptr_t fptr_deinterlace_4field_gray8;

/* Pointer to image buffer memory copy function */
imgbufcpy_fptr_t fptr_imgbufcpy;

Image::Image()
{
  if ( !initialised )
    Initialise();
  width = 0;
  height = 0;
  pixels = 0;
  colours = 0;
  subpixelorder = 0;
  size = 0;
  allocation = 0;
  buffer = 0;
  buffertype = 0;
  holdbuffer = 0;
  text[0] = '\0';
}

Image::Image( const char *filename )
{
  if ( !initialised )
    Initialise();
  width = 0;
  height = 0;
  pixels = 0;
  colours = 0;
  subpixelorder = 0;  
  size = 0;
  allocation = 0;
  buffer = 0;
  buffertype = 0;
  holdbuffer = 0;
  ReadJpeg( filename, ZM_COLOUR_RGB24, ZM_SUBPIX_ORDER_RGB);
  text[0] = '\0';
}

Image::Image( int p_width, int p_height, int p_colours, int p_subpixelorder, uint8_t *p_buffer )
{
  if ( !initialised )
    Initialise();
  width = p_width;
  height = p_height;
  pixels = width*height;
  colours = p_colours;
  subpixelorder = p_subpixelorder;
  size = pixels*colours;
  buffer = 0;
  holdbuffer = 0;
  if ( p_buffer )
  {
    allocation = size;
    buffertype = ZM_BUFTYPE_DONTFREE;
    buffer = p_buffer;
  }
  else
  {
    AllocImgBuffer(size);
  }
  text[0] = '\0';
}

Image::Image( const Image &p_image )
{
  if ( !initialised )
    Initialise();
  width = p_image.width;
  height = p_image.height;
  pixels = p_image.pixels;
  colours = p_image.colours;
  subpixelorder = p_image.subpixelorder;
  size = p_image.size; // allocation is set in AllocImgBuffer
  buffer = 0;
  holdbuffer = 0;
  AllocImgBuffer(size);
  (*fptr_imgbufcpy)(buffer, p_image.buffer, size);
  strncpy( text, p_image.text, sizeof(text) );
}

Image::~Image() {
  DumpImgBuffer();
}

/* Should be called as part of program shutdown to free everything */
void Image::Deinitialise() {
  if ( initialised ) {
	  /*
    delete[] y_table;
    delete[] uv_table;
    delete[] r_v_table;
    delete[] g_v_table;
    delete[] g_u_table;
    delete[] b_u_table;
	 */
    initialised = false;
    if ( readjpg_dcinfo ) {
      jpeg_destroy_decompress( readjpg_dcinfo );
      delete readjpg_dcinfo;
      readjpg_dcinfo = 0;
    }
    if ( decodejpg_dcinfo )
    {
      jpeg_destroy_decompress( decodejpg_dcinfo );
      delete decodejpg_dcinfo;
      decodejpg_dcinfo = 0;
    }
    for ( unsigned int quality=0; quality <= 100; quality += 1 ) {
      if ( writejpg_ccinfo[quality] ) {
        jpeg_destroy_compress( writejpg_ccinfo[quality] );
        delete writejpg_ccinfo[quality];
        writejpg_ccinfo[quality] = NULL;
      }
    } // end foreach quality
  }
}

void Image::Initialise()
{
  /* Assign the blend pointer to function */
  if(config.fast_image_blends) {
    if(config.cpu_extensions && sseversion >= 20) {
      fptr_blend = &sse2_fastblend; /* SSE2 fast blend */
      Debug(4,"Blend: Using SSE2 fast blend function");
    } else {
      fptr_blend = &std_fastblend;  /* standard fast blend */
      Debug(4,"Blend: Using fast blend function");
    }
  } else {
    fptr_blend = &std_blend;
    Debug(4,"Blend: Using standard blend function");
  }
  
  __attribute__((aligned(16))) uint8_t blend1[16] = {142,255,159,91,88,227,0,52,37,80,152,97,104,252,90,82};
  __attribute__((aligned(16))) uint8_t blend2[16] = {129,56,136,96,119,149,94,29,96,176,1,144,230,203,111,172};
  __attribute__((aligned(16))) uint8_t blendres[16];
  __attribute__((aligned(16))) uint8_t blendexp[16] = {141,231,157,92,91,217,11,49,45,92,133,103,119,246,92,93}; /* Expected results for 12.5% blend */
  
  (*fptr_blend)(blend1,blend2,blendres,16,12.5);
  
  /* Compare results with expected results */
  for(int i=0;i<16;i++) {
    if(abs(blendexp[i] - blendres[i]) > 3) {
      Panic("Blend function failed self-test: Results differ from the expected results");
    }
  }
  
  fptr_delta8_rgb = &std_delta8_rgb;
  fptr_delta8_bgr = &std_delta8_bgr;
  
  /* Assign the delta functions */
  if(config.cpu_extensions) {
    if(sseversion >= 35) {
      /* SSSE3 available */
      fptr_delta8_rgba = &ssse3_delta8_rgba;
      fptr_delta8_bgra = &ssse3_delta8_bgra;
      fptr_delta8_argb = &ssse3_delta8_argb;
      fptr_delta8_abgr = &ssse3_delta8_abgr;
      fptr_delta8_gray8 = &sse2_delta8_gray8;
      Debug(4,"Delta: Using SSSE3 delta functions");
    } else if(sseversion >= 20) {
      /* SSE2 available */
      fptr_delta8_rgba = &sse2_delta8_rgba;
      fptr_delta8_bgra = &sse2_delta8_bgra;
      fptr_delta8_argb = &sse2_delta8_argb;
      fptr_delta8_abgr = &sse2_delta8_abgr;
      /*
      ** On some systems, the 4 SSE2 algorithms above might be a little slower than
      ** the standard algorithms, especially on early Pentium 4 processors.
      ** In that case, comment out the 4 lines above and uncomment the 4 lines below
      */
      // fptr_delta8_rgba = &std_delta8_rgba;
      // fptr_delta8_bgra = &std_delta8_bgra;
      // fptr_delta8_argb = &std_delta8_argb;
      // fptr_delta8_abgr = &std_delta8_abgr;
      fptr_delta8_gray8 = &sse2_delta8_gray8;
      Debug(4,"Delta: Using SSE2 delta functions");
    } else {
      /* No suitable SSE version available */
      fptr_delta8_rgba = &std_delta8_rgba;
      fptr_delta8_bgra = &std_delta8_bgra;
      fptr_delta8_argb = &std_delta8_argb;
      fptr_delta8_abgr = &std_delta8_abgr;
      fptr_delta8_gray8 = &std_delta8_gray8;
      Debug(4,"Delta: Using standard delta functions");
    }
  } else {
    /* CPU extensions disabled */
    fptr_delta8_rgba = &std_delta8_rgba;
    fptr_delta8_bgra = &std_delta8_bgra;
    fptr_delta8_argb = &std_delta8_argb;
    fptr_delta8_abgr = &std_delta8_abgr;
    fptr_delta8_gray8 = &std_delta8_gray8;
    Debug(4,"Delta: CPU extensions disabled, using standard delta functions");
  }
  
  /* Use SSSE3 deinterlace functions? */
  if(config.cpu_extensions && sseversion >= 35) {
    fptr_deinterlace_4field_rgba = &ssse3_deinterlace_4field_rgba;
    fptr_deinterlace_4field_bgra = &ssse3_deinterlace_4field_bgra;
    fptr_deinterlace_4field_argb = &ssse3_deinterlace_4field_argb;
    fptr_deinterlace_4field_abgr = &ssse3_deinterlace_4field_abgr;
    fptr_deinterlace_4field_gray8 = &ssse3_deinterlace_4field_gray8;
    Debug(4,"Deinterlace: Using SSSE3 delta functions");
  } else {
    fptr_deinterlace_4field_rgba = &std_deinterlace_4field_rgba;
    fptr_deinterlace_4field_bgra = &std_deinterlace_4field_bgra;
    fptr_deinterlace_4field_argb = &std_deinterlace_4field_argb;
    fptr_deinterlace_4field_abgr = &std_deinterlace_4field_abgr;
    fptr_deinterlace_4field_gray8 = &std_deinterlace_4field_gray8;
    Debug(4,"Deinterlace: Using standard delta functions");
  }
  
  /* Use SSE2 aligned memory copy? */
  if(config.cpu_extensions && sseversion >= 20) {
    fptr_imgbufcpy = &sse2_aligned_memcpy;
    Debug(4,"Image buffer copy: Using SSE2 aligned memcpy");
  } else {
    fptr_imgbufcpy = &memcpy;
    Debug(4,"Image buffer copy: Using standard memcpy");
  }
  
  /* Code below relocated from zm_local_camera */
  Debug( 3, "Setting up static colour tables" );
  
  y_table = y_table_global;
  uv_table = uv_table_global;
  r_v_table = r_v_table_global;
  g_v_table = g_v_table_global;
  g_u_table = g_u_table_global;
  b_u_table = b_u_table_global;
  /*
  y_table = new unsigned char[256];
  for ( int i = 0; i <= 255; i++ )
  {
    unsigned char c = i;
    if ( c <= 16 )
      y_table[c] = 0;
    else if ( c >= 235 )
      y_table[c] = 255;
    else
      y_table[c] = (255*(c-16))/219;
  }

  uv_table = new signed char[256];
  for ( int i = 0; i <= 255; i++ )
  {
    unsigned char c = i;
    if ( c <= 16 )
      uv_table[c] = -127;
    else if ( c >= 240 )
      uv_table[c] = 127;
    else
      uv_table[c] = (127*(c-128))/112;
  }

  r_v_table = new short[255];
  g_v_table = new short[255];
  g_u_table = new short[255];
  b_u_table = new short[255];
  for ( int i = 0; i < 255; i++ )
  {
    r_v_table[i] = (1402*(i-128))/1000;
    g_u_table[i] = (344*(i-128))/1000;
    g_v_table[i] = (714*(i-128))/1000;
    b_u_table[i] = (1772*(i-128))/1000;
  }
   */
  
  initialised = true;
}

/* Requests a writeable buffer to the image. This is safer than buffer() because this way we can guarantee that a buffer of required size exists */
uint8_t* Image::WriteBuffer(const unsigned int p_width, const unsigned int p_height, const unsigned int p_colours, const unsigned int p_subpixelorder) {
  unsigned int newsize;
  
  if(p_colours != ZM_COLOUR_GRAY8 && p_colours != ZM_COLOUR_RGB24 && p_colours != ZM_COLOUR_RGB32) {
    Error("WriteBuffer called with unexpected colours: %d",p_colours);
    return NULL;
  }
  
  if(!p_height || !p_width) {
    Error("WriteBuffer called with invalid width or height: %d %d",p_width,p_height);
    return NULL;
  }
  
  if(p_width != width || p_height != height || p_colours != colours || p_subpixelorder != subpixelorder) {
    newsize = (p_width * p_height) * p_colours;
    
    if(buffer == NULL) {
      AllocImgBuffer(newsize);
    } else {
      if(allocation < newsize) {
        if(holdbuffer) {
          Error("Held buffer is undersized for requested buffer");
          return NULL;
        } else {
          /* Replace buffer with a bigger one */
          //DumpImgBuffer(); // Done in AllocImgBuffer too
          AllocImgBuffer(newsize);
        }
      }
    }
    
    width = p_width;
    height = p_height;
    colours = p_colours;
    subpixelorder = p_subpixelorder;
    pixels = height*width;
    size = newsize; 
  }
  
  return buffer; 
  
}

/* Assign an existing buffer to the image instead of copying from a source buffer. The goal is to reduce the amount of memory copying and increase efficiency and buffer reusing. */
void Image::AssignDirect( const unsigned int p_width, const unsigned int p_height, const unsigned int p_colours, const unsigned int p_subpixelorder, uint8_t *new_buffer, const size_t buffer_size, const int p_buffertype) {
  if(new_buffer == NULL) {
    Error("Attempt to directly assign buffer from a NULL pointer");
    return;
  }

  if(!p_height || !p_width) {
    Error("Attempt to directly assign buffer with invalid width or height: %d %d",p_width,p_height);
    return;
  }

  if(p_colours != ZM_COLOUR_GRAY8 && p_colours != ZM_COLOUR_RGB24 && p_colours != ZM_COLOUR_RGB32) {
    Error("Attempt to directly assign buffer with unexpected colours per pixel: %d",p_colours);
    return;
  }

  unsigned int new_buffer_size = ((p_width*p_height)*p_colours);
  
  if(buffer_size < new_buffer_size) {
    Error("Attempt to directly assign buffer from an undersized buffer of size: %zu, needed %dx%d*%d colours = %zu",buffer_size, p_width, p_height, p_colours, new_buffer_size );
    return;
  }
  
  if(holdbuffer && buffer) {
    if(new_buffer_size > allocation) {
      Error("Held buffer is undersized for assigned buffer");
      return;
    } else {
      width = p_width;
      height = p_height;
      colours = p_colours;
      subpixelorder = p_subpixelorder;
      pixels = height*width;
      size = new_buffer_size; // was pixels*colours, but we already calculated it above as new_buffer_size
      
      /* Copy into the held buffer */
      if(new_buffer != buffer)
        (*fptr_imgbufcpy)(buffer, new_buffer, size);
      
      /* Free the new buffer */
      DumpBuffer(new_buffer, p_buffertype);
    }
  } else {
    /* Free an existing buffer if any */
    DumpImgBuffer();
    
    width = p_width;
    height = p_height;
    colours = p_colours;
    subpixelorder = p_subpixelorder;
    pixels = height*width;
    size = new_buffer_size; // was pixels*colours, but we already calculated it above as new_buffer_size
  
    allocation = buffer_size;
    buffertype = p_buffertype;
    buffer = new_buffer;
  }
  
}

void Image::Assign(const unsigned int p_width, const unsigned int p_height, const unsigned int p_colours, const unsigned int p_subpixelorder, const uint8_t* new_buffer, const size_t buffer_size) {
  unsigned int new_size = (p_width * p_height) * p_colours;
  
  if(new_buffer == NULL) {
    Error("Attempt to assign buffer from a NULL pointer");
    return;
  }
  
  if(buffer_size < new_size) {
    Error("Attempt to assign buffer from an undersized buffer of size: %zu",buffer_size);
    return;
  }
  
  if(!p_height || !p_width) {
    Error("Attempt to assign buffer with invalid width or height: %d %d",p_width,p_height);
    return;
  }
  
  if(p_colours != ZM_COLOUR_GRAY8 && p_colours != ZM_COLOUR_RGB24 && p_colours != ZM_COLOUR_RGB32) {
    Error("Attempt to assign buffer with unexpected colours per pixel: %d",p_colours);
    return;
  }
  
  if ( !buffer || p_width != width || p_height != height || p_colours != colours || p_subpixelorder != subpixelorder) {

    if (holdbuffer && buffer) {
      if (new_size > allocation) {
        Error("Held buffer is undersized for assigned buffer");
        return;
      }
    } else {
      if(new_size > allocation || !buffer) { 
        DumpImgBuffer();
        AllocImgBuffer(new_size);
      }
    }
    
    width = p_width;
    height = p_height;
    pixels = width*height;
    colours = p_colours;
    subpixelorder = p_subpixelorder;
    size = new_size;
  }
  
  if(new_buffer != buffer)
    (*fptr_imgbufcpy)(buffer, new_buffer, size);
  
}

void Image::Assign( const Image &image ) {
  unsigned int new_size = (image.width * image.height) * image.colours;
  
  if(image.buffer == NULL) {
    Error("Attempt to assign image with an empty buffer");
    return;
  }
  
  if(image.colours != ZM_COLOUR_GRAY8 && image.colours != ZM_COLOUR_RGB24 && image.colours != ZM_COLOUR_RGB32) {
    Error("Attempt to assign image with unexpected colours per pixel: %d",image.colours);
    return;
  }
  
  if ( !buffer || image.width != width || image.height != height || image.colours != colours || image.subpixelorder != subpixelorder) {

    if (holdbuffer && buffer) {
      if (new_size > allocation) {
        Error("Held buffer is undersized for assigned buffer");
        return;
      }
    } else {
      if(new_size > allocation || !buffer) { 
        // DumpImgBuffer(); This is also done in AllocImgBuffer
        AllocImgBuffer(new_size);
      }
    }
    
    width = image.width;
    height = image.height;
    pixels = width*height;
    colours = image.colours;
    subpixelorder = image.subpixelorder;
    size = new_size;
  }
  
  if(image.buffer != buffer)
    (*fptr_imgbufcpy)(buffer, image.buffer, size);
}

Image *Image::HighlightEdges( Rgb colour, unsigned int p_colours, unsigned int p_subpixelorder, const Box *limits )
{
  if ( colours != ZM_COLOUR_GRAY8 )
  {
    Panic( "Attempt to highlight image edges when colours = %d", colours );
  }
  
  /* Convert the colour's RGBA subpixel order into the image's subpixel order */
  colour = rgb_convert(colour,p_subpixelorder);
  
  /* Create a new image of the target format */
  Image *high_image = new Image( width, height, p_colours, p_subpixelorder );
  uint8_t* high_buff = high_image->WriteBuffer(width, height, p_colours, p_subpixelorder);
  
  /* Set image to all black */
  high_image->Clear();

  unsigned int lo_x = limits?limits->Lo().X():0;
  unsigned int lo_y = limits?limits->Lo().Y():0;
  unsigned int hi_x = limits?limits->Hi().X():width-1;
  unsigned int hi_y = limits?limits->Hi().Y():height-1;
  
  if ( p_colours == ZM_COLOUR_GRAY8 )
  {
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      const uint8_t* p = buffer + (y * width) + lo_x;
      uint8_t* phigh = high_buff + (y * width) + lo_x;
      for ( unsigned int x = lo_x; x <= hi_x; x++, p++, phigh++ )
      {
        bool edge = false;
        if ( *p )
        {
          if ( !edge && x > 0 && !*(p-1) ) edge = true;
          if ( !edge && x < (width-1) && !*(p+1) ) edge = true;
          if ( !edge && y > 0 && !*(p-width) ) edge = true;
          if ( !edge && y < (height-1) && !*(p+width) ) edge = true;
        }
        if ( edge )
        {
          *phigh = colour;
        }
      }
    }
  }
  else if ( p_colours == ZM_COLOUR_RGB24 )
  {
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      const uint8_t* p = buffer + (y * width) + lo_x;
      uint8_t* phigh = high_buff + (((y * width) + lo_x) * 3);
      for ( unsigned int x = lo_x; x <= hi_x; x++, p++, phigh += 3 )
      {
        bool edge = false;
        if ( *p )
        {
          if ( !edge && x > 0 && !*(p-1) ) edge = true;
          if ( !edge && x < (width-1) && !*(p+1) ) edge = true;
          if ( !edge && y > 0 && !*(p-width) ) edge = true;
          if ( !edge && y < (height-1) && !*(p+width) ) edge = true;
        }
        if ( edge )
        {
          RED_PTR_RGBA(phigh) = RED_VAL_RGBA(colour);
          GREEN_PTR_RGBA(phigh) = GREEN_VAL_RGBA(colour);
          BLUE_PTR_RGBA(phigh) = BLUE_VAL_RGBA(colour);
        }
      }
    }
  }
  else if ( p_colours == ZM_COLOUR_RGB32 )
  {
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      const uint8_t* p = buffer + (y * width) + lo_x;
      Rgb* phigh = (Rgb*)(high_buff + (((y * width) + lo_x) * 4));
      for ( unsigned int x = lo_x; x <= hi_x; x++, p++, phigh++ )
      {
        bool edge = false;
        if ( *p )
        {
          if ( !edge && x > 0 && !*(p-1) ) edge = true;
          if ( !edge && x < (width-1) && !*(p+1) ) edge = true;
          if ( !edge && y > 0 && !*(p-width) ) edge = true;
          if ( !edge && y < (height-1) && !*(p+width) ) edge = true;
        }
        if ( edge )
        {
          *phigh = colour;
        }
      }
    }
  }
  
  return( high_image );
}

bool Image::ReadRaw( const char *filename )
{
  FILE *infile;
  if ( (infile = fopen( filename, "rb" )) == NULL )
  {
    Error( "Can't open %s: %s", filename, strerror(errno) );
    return( false );
  }

  struct stat statbuf;
  if ( fstat( fileno(infile), &statbuf ) < 0 )
  {
    Error( "Can't fstat %s: %s", filename, strerror(errno) );
    return( false );
  }

  if ( statbuf.st_size != size )
  {
    Error( "Raw file size mismatch, expected %d bytes, found %ld", size, statbuf.st_size );
    return( false );
  }

  if ( fread( buffer, size, 1, infile ) < 1 )
  {
    Fatal( "Unable to read from '%s': %s", filename, strerror(errno) );
    return( false );
  }

  fclose( infile );

  return( true );
}

bool Image::WriteRaw( const char *filename ) const
{
  FILE *outfile;
  if ( (outfile = fopen( filename, "wb" )) == NULL )
  {
    Error( "Can't open %s: %s", filename, strerror(errno) );
    return( false );
  }

  if ( fwrite( buffer, size, 1, outfile ) != 1 )
  {
    Error( "Unable to write to '%s': %s", filename, strerror(errno) );
    return( false );
  }

  fclose( outfile );

  return( true );
}

bool Image::ReadJpeg( const char *filename, unsigned int p_colours, unsigned int p_subpixelorder)
{
  unsigned int new_width, new_height, new_colours, new_subpixelorder;
  struct jpeg_decompress_struct *cinfo = readjpg_dcinfo;

  if ( !cinfo )
  {
    cinfo = readjpg_dcinfo = new jpeg_decompress_struct;
    cinfo->err = jpeg_std_error( &jpg_err.pub );
    jpg_err.pub.error_exit = zm_jpeg_error_exit;
    jpg_err.pub.emit_message = zm_jpeg_emit_message;
    jpeg_create_decompress( cinfo );
  }

  FILE *infile;
  if ( (infile = fopen( filename, "rb" )) == NULL )
  {
    Error( "Can't open %s: %s", filename, strerror(errno) );
    return( false );
  }

  if ( setjmp( jpg_err.setjmp_buffer ) )
  {
    jpeg_abort_decompress( cinfo );
    fclose( infile );
    return( false );
  }

  jpeg_stdio_src( cinfo, infile );

  jpeg_read_header( cinfo, TRUE );

  if ( cinfo->num_components != 1 && cinfo->num_components != 3 )
  {
    Error( "Unexpected colours when reading jpeg image: %d", colours );
    jpeg_abort_decompress( cinfo );
    fclose( infile );
    return( false );
  }
  
  /* Check if the image has at least one huffman table defined. If not, use the standard ones */
  /* This is required for the MJPEG capture palette of USB devices */
  if(cinfo->dc_huff_tbl_ptrs[0] == NULL) {
    zm_use_std_huff_tables(cinfo);
  }

  new_width = cinfo->image_width;
  new_height = cinfo->image_height;

  if ( width != new_width || height != new_height )
  {
    Debug(9,"Image dimensions differ. Old: %ux%u New: %ux%u",width,height,new_width,new_height);
  }
  
  switch(p_colours) {
    case ZM_COLOUR_GRAY8:
    {
    cinfo->out_color_space = JCS_GRAYSCALE;
    new_colours = ZM_COLOUR_GRAY8;
    new_subpixelorder = ZM_SUBPIX_ORDER_NONE;
    break;
    }
    case ZM_COLOUR_RGB32:
    {
#ifdef JCS_EXTENSIONS
    new_colours = ZM_COLOUR_RGB32;
    if(p_subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      cinfo->out_color_space = JCS_EXT_BGRX;
      new_subpixelorder = ZM_SUBPIX_ORDER_BGRA;
    } else if(p_subpixelorder == ZM_SUBPIX_ORDER_ARGB) {
      cinfo->out_color_space = JCS_EXT_XRGB;
      new_subpixelorder = ZM_SUBPIX_ORDER_ARGB;
    } else if(p_subpixelorder == ZM_SUBPIX_ORDER_ABGR) {
      cinfo->out_color_space = JCS_EXT_XBGR;
      new_subpixelorder = ZM_SUBPIX_ORDER_ABGR;
    } else {
      /* Assume RGBA */
      cinfo->out_color_space = JCS_EXT_RGBX;
      new_subpixelorder = ZM_SUBPIX_ORDER_RGBA;
    }
    break;    
#else
    Warning("libjpeg-turbo is required for reading a JPEG directly into a RGB32 buffer, reading into a RGB24 buffer instead.");
#endif
    }
    case ZM_COLOUR_RGB24:
    default:
    {
    new_colours = ZM_COLOUR_RGB24;
    if(p_subpixelorder == ZM_SUBPIX_ORDER_BGR) {
#ifdef JCS_EXTENSIONS    
      cinfo->out_color_space = JCS_EXT_BGR;  
      new_subpixelorder = ZM_SUBPIX_ORDER_BGR;
#else
      Warning("libjpeg-turbo is required for reading a JPEG directly into a BGR24 buffer, reading into a RGB24 buffer instead.");    
      cinfo->out_color_space = JCS_RGB;  
      new_subpixelorder = ZM_SUBPIX_ORDER_RGB;
#endif
    } else {
      /* Assume RGB */
/*
#ifdef JCS_EXTENSIONS
      cinfo->out_color_space = JCS_EXT_RGB;
#else
      cinfo->out_color_space = JCS_RGB;
#endif
*/
      cinfo->out_color_space = JCS_RGB;
      new_subpixelorder = ZM_SUBPIX_ORDER_RGB;
    }
    break;
    }
  }
  
  if(WriteBuffer(new_width, new_height, new_colours, new_subpixelorder) == NULL) {
    Error("Failed requesting writeable buffer for reading JPEG image.");
    jpeg_abort_decompress( cinfo );
    fclose( infile );
    return( false );
  }

  jpeg_start_decompress( cinfo );

  JSAMPROW row_pointer;  /* pointer to a single row */
  int row_stride = width * colours; /* physical row width in buffer */
  while ( cinfo->output_scanline < cinfo->output_height )
  {
    row_pointer = &buffer[cinfo->output_scanline * row_stride];
    jpeg_read_scanlines( cinfo, &row_pointer, 1 );
  }

  jpeg_finish_decompress( cinfo );

  fclose( infile );

  return( true );
}

// Multiple calling formats to permit inclusion (or not) of both quality_override and timestamp (exif), with suitable defaults.
// Note quality=zero means default

bool Image::WriteJpeg( const char *filename, int quality_override) const
{
  return Image::WriteJpeg(filename, quality_override, (timeval){0,0});
}
bool Image::WriteJpeg( const char *filename) const
{
  return Image::WriteJpeg(filename, 0, (timeval){0,0});
}
bool Image::WriteJpeg( const char *filename, struct timeval timestamp ) const
{
  return Image::WriteJpeg(filename,0,timestamp);
}

bool Image::WriteJpeg( const char *filename, int quality_override, struct timeval timestamp  ) const
{
  if ( config.colour_jpeg_files && colours == ZM_COLOUR_GRAY8 )
  {
    Image temp_image( *this );
    temp_image.Colourise( ZM_COLOUR_RGB24, ZM_SUBPIX_ORDER_RGB );
    return( temp_image.WriteJpeg( filename, quality_override, timestamp) );
  }
  int quality = quality_override?quality_override:config.jpeg_file_quality;

  struct jpeg_compress_struct *cinfo = writejpg_ccinfo[quality];

  if ( !cinfo )
  {
    cinfo = writejpg_ccinfo[quality] = new jpeg_compress_struct;
    cinfo->err = jpeg_std_error( &jpg_err.pub );
    jpg_err.pub.error_exit = zm_jpeg_error_exit;
    jpg_err.pub.emit_message = zm_jpeg_emit_message;
    jpeg_create_compress( cinfo );
  }

  FILE *outfile;
  if ( (outfile = fopen( filename, "wb" )) == NULL )
  {
    Error( "Can't open %s: %s", filename, strerror(errno) );
    return( false );
  }
  jpeg_stdio_dest( cinfo, outfile );

  cinfo->image_width = width;   /* image width and height, in pixels */
  cinfo->image_height = height;
  
  switch(colours) {
    case ZM_COLOUR_GRAY8:
    {
    cinfo->input_components = 1;
    cinfo->in_color_space = JCS_GRAYSCALE;
    break;
    }
    case ZM_COLOUR_RGB32:
    {
#ifdef JCS_EXTENSIONS
    cinfo->input_components = 4;
    if(subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      cinfo->in_color_space = JCS_EXT_BGRX;
    } else if(subpixelorder == ZM_SUBPIX_ORDER_ARGB) {
      cinfo->in_color_space = JCS_EXT_XRGB;
    } else if(subpixelorder == ZM_SUBPIX_ORDER_ABGR) {
      cinfo->in_color_space = JCS_EXT_XBGR;
    } else {
      /* Assume RGBA */
      cinfo->in_color_space = JCS_EXT_RGBX;
    }  
#else
    Error("libjpeg-turbo is required for JPEG encoding directly from RGB32 source");
    jpeg_abort_compress( cinfo );
    fclose(outfile);
    return(false);
#endif
    break;
    }
    case ZM_COLOUR_RGB24:
    default:
    {
    cinfo->input_components = 3;
    if(subpixelorder == ZM_SUBPIX_ORDER_BGR) {
#ifdef JCS_EXTENSIONS   
      cinfo->in_color_space = JCS_EXT_BGR;
#else
      Error("libjpeg-turbo is required for JPEG encoding directly from BGR24 source");
      jpeg_abort_compress( cinfo );
      fclose(outfile);
      return(false);                                          
#endif
    } else {
      /* Assume RGB */
/*
#ifdef JCS_EXTENSIONS
      cinfo->out_color_space = JCS_EXT_RGB;
#else
      cinfo->out_color_space = JCS_RGB;
#endif
*/
      cinfo->in_color_space = JCS_RGB;
    }
    break;
    }
  }
  
  jpeg_set_defaults( cinfo );
  jpeg_set_quality( cinfo, quality, FALSE );
  cinfo->dct_method = JDCT_FASTEST;

  jpeg_start_compress( cinfo, TRUE );
  if ( config.add_jpeg_comments && text[0] )
  {
    jpeg_write_marker( cinfo, JPEG_COM, (const JOCTET *)text, strlen(text) );
  }
    // If we have a non-zero time (meaning a parameter was passed in), then form a simple exif segment with that time as DateTimeOriginal and SubsecTimeOriginal
    // No timestamp just leave off the exif section.
    if(timestamp.tv_sec)
    {
      #define EXIFTIMES_MS_OFFSET 0x36   // three decimal digits for milliseconds
      #define EXIFTIMES_MS_LEN  0x03
      #define EXIFTIMES_OFFSET  0x3E   // 19 characters format '2015:07:21 13:14:45' not including quotes
      #define EXIFTIMES_LEN     0x13   // = 19
      #define EXIF_CODE       0xE1

      char timebuf[64], msbuf[64];
      strftime(timebuf, sizeof timebuf, "%Y:%m:%d %H:%M:%S", localtime(&(timestamp.tv_sec)));
      snprintf(msbuf, sizeof msbuf, "%06d",(int)(timestamp.tv_usec));  // we only use milliseconds because that's all defined in exif, but this is the whole microseconds because we have it
      unsigned char exiftimes[82] = {
         0x45, 0x78, 0x69, 0x66, 0x00, 0x00, 0x49, 0x49, 0x2A, 0x00, 0x08, 0x00, 0x00, 0x00, 0x01, 0x00,
         0x69, 0x87, 0x04, 0x00, 0x01, 0x00, 0x00, 0x00, 0x1A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x02, 0x00, 0x03, 0x90, 0x02, 0x00, 0x14, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00, 0x91, 0x92,
         0x02, 0x00, 0x04, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
         0xff, 0x00 };
      memcpy(&exiftimes[EXIFTIMES_OFFSET],  timebuf,EXIFTIMES_LEN);
      memcpy(&exiftimes[EXIFTIMES_MS_OFFSET], msbuf  ,EXIFTIMES_MS_LEN);
      jpeg_write_marker (cinfo, EXIF_CODE, (const JOCTET *)exiftimes, sizeof(exiftimes) );
    }

  JSAMPROW row_pointer;  /* pointer to a single row */
  int row_stride = cinfo->image_width * colours; /* physical row width in buffer */
  while ( cinfo->next_scanline < cinfo->image_height )
  {
    row_pointer = &buffer[cinfo->next_scanline * row_stride];
    jpeg_write_scanlines( cinfo, &row_pointer, 1 );
  }

  jpeg_finish_compress( cinfo );

  fclose( outfile );

  return( true );
}

bool Image::DecodeJpeg( const JOCTET *inbuffer, int inbuffer_size, unsigned int p_colours, unsigned int p_subpixelorder)
{
  unsigned int new_width, new_height, new_colours, new_subpixelorder;
  struct jpeg_decompress_struct *cinfo = decodejpg_dcinfo;

  if ( !cinfo )
  {
    cinfo = decodejpg_dcinfo = new jpeg_decompress_struct;
    cinfo->err = jpeg_std_error( &jpg_err.pub );
    jpg_err.pub.error_exit = zm_jpeg_error_exit;
    jpg_err.pub.emit_message = zm_jpeg_emit_message;
    jpeg_create_decompress( cinfo );
  }

  if ( setjmp( jpg_err.setjmp_buffer ) )
  {
    jpeg_abort_decompress( cinfo );
    return( false );
  }

  zm_jpeg_mem_src( cinfo, inbuffer, inbuffer_size );

  jpeg_read_header( cinfo, TRUE );

  if ( cinfo->num_components != 1 && cinfo->num_components != 3 )
  {
    Error( "Unexpected colours when reading jpeg image: %d", colours );
    jpeg_abort_decompress( cinfo );
    return( false );
  }
  
  /* Check if the image has at least one huffman table defined. If not, use the standard ones */
  /* This is required for the MJPEG capture palette of USB devices */
  if(cinfo->dc_huff_tbl_ptrs[0] == NULL) {
    zm_use_std_huff_tables(cinfo);
  }

  new_width = cinfo->image_width;
  new_height = cinfo->image_height;

  if ( width != new_width || height != new_height )
  {
    Debug(9,"Image dimensions differ. Old: %ux%u New: %ux%u",width,height,new_width,new_height);
  }
  
  switch(p_colours) {
    case ZM_COLOUR_GRAY8:
    {
    cinfo->out_color_space = JCS_GRAYSCALE;
    new_colours = ZM_COLOUR_GRAY8;
    new_subpixelorder = ZM_SUBPIX_ORDER_NONE;
    break;
    }
    case ZM_COLOUR_RGB32:
    {
#ifdef JCS_EXTENSIONS
    new_colours = ZM_COLOUR_RGB32;
    if(p_subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      cinfo->out_color_space = JCS_EXT_BGRX;
      new_subpixelorder = ZM_SUBPIX_ORDER_BGRA;
    } else if(p_subpixelorder == ZM_SUBPIX_ORDER_ARGB) {
      cinfo->out_color_space = JCS_EXT_XRGB;
      new_subpixelorder = ZM_SUBPIX_ORDER_ARGB;
    } else if(p_subpixelorder == ZM_SUBPIX_ORDER_ABGR) {
      cinfo->out_color_space = JCS_EXT_XBGR;
      new_subpixelorder = ZM_SUBPIX_ORDER_ABGR;
    } else {
      /* Assume RGBA */
      cinfo->out_color_space = JCS_EXT_RGBX;
      new_subpixelorder = ZM_SUBPIX_ORDER_RGBA;
    }
    break;    
#else
    Warning("libjpeg-turbo is required for reading a JPEG directly into a RGB32 buffer, reading into a RGB24 buffer instead.");
#endif
    }
    case ZM_COLOUR_RGB24:
    default:
    {
    new_colours = ZM_COLOUR_RGB24;
    if(p_subpixelorder == ZM_SUBPIX_ORDER_BGR) {
#ifdef JCS_EXTENSIONS    
      cinfo->out_color_space = JCS_EXT_BGR;  
      new_subpixelorder = ZM_SUBPIX_ORDER_BGR;
#else
      Warning("libjpeg-turbo is required for reading a JPEG directly into a BGR24 buffer, reading into a RGB24 buffer instead.");    
      cinfo->out_color_space = JCS_RGB;  
      new_subpixelorder = ZM_SUBPIX_ORDER_RGB;
#endif
    } else {
      /* Assume RGB */
/*
#ifdef JCS_EXTENSIONS
      cinfo->out_color_space = JCS_EXT_RGB;
#else
      cinfo->out_color_space = JCS_RGB;
#endif
*/
      cinfo->out_color_space = JCS_RGB;
      new_subpixelorder = ZM_SUBPIX_ORDER_RGB;
    }
    break;
    }
  }
  
  if(WriteBuffer(new_width, new_height, new_colours, new_subpixelorder) == NULL) {
    Error("Failed requesting writeable buffer for reading JPEG image.");
    jpeg_abort_decompress( cinfo );
    return( false );
  }

  jpeg_start_decompress( cinfo );

  JSAMPROW row_pointer;  /* pointer to a single row */
  int row_stride = width * colours; /* physical row width in buffer */
  while ( cinfo->output_scanline < cinfo->output_height )
  {
    row_pointer = &buffer[cinfo->output_scanline * row_stride];
    jpeg_read_scanlines( cinfo, &row_pointer, 1 );
  }

  jpeg_finish_decompress( cinfo );

  return( true );
}

bool Image::EncodeJpeg( JOCTET *outbuffer, int *outbuffer_size, int quality_override ) const
{
  if ( config.colour_jpeg_files && colours == ZM_COLOUR_GRAY8 )
  {
    Image temp_image( *this );
    temp_image.Colourise(ZM_COLOUR_RGB24, ZM_SUBPIX_ORDER_RGB );
    return( temp_image.EncodeJpeg( outbuffer, outbuffer_size, quality_override ) );
  }

  int quality = quality_override?quality_override:config.jpeg_stream_quality;

  struct jpeg_compress_struct *cinfo = encodejpg_ccinfo[quality];

  if ( !cinfo )
  {
    cinfo = encodejpg_ccinfo[quality] = new jpeg_compress_struct;
    cinfo->err = jpeg_std_error( &jpg_err.pub );
    jpg_err.pub.error_exit = zm_jpeg_error_exit;
    jpg_err.pub.emit_message = zm_jpeg_emit_message;
    jpeg_create_compress( cinfo );
  }

  zm_jpeg_mem_dest( cinfo, outbuffer, outbuffer_size );

  cinfo->image_width = width;   /* image width and height, in pixels */
  cinfo->image_height = height;

  switch(colours) {
    case ZM_COLOUR_GRAY8:
    {
    cinfo->input_components = 1;
    cinfo->in_color_space = JCS_GRAYSCALE;
    break;
    }
    case ZM_COLOUR_RGB32:
    {
#ifdef JCS_EXTENSIONS
    cinfo->input_components = 4;
    if(subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      cinfo->in_color_space = JCS_EXT_BGRX;
    } else if(subpixelorder == ZM_SUBPIX_ORDER_ARGB) {
      cinfo->in_color_space = JCS_EXT_XRGB;
    } else if(subpixelorder == ZM_SUBPIX_ORDER_ABGR) {
      cinfo->in_color_space = JCS_EXT_XBGR;
    } else {
      /* Assume RGBA */
      cinfo->in_color_space = JCS_EXT_RGBX;
    } 
#else
    Error("libjpeg-turbo is required for JPEG encoding directly from RGB32 source");
    jpeg_abort_compress( cinfo );
    return(false);
#endif
    break;
    }
    case ZM_COLOUR_RGB24:
    default:
    {
    cinfo->input_components = 3;
    if(subpixelorder == ZM_SUBPIX_ORDER_BGR) {
#ifdef JCS_EXTENSIONS   
      cinfo->in_color_space = JCS_EXT_BGR;
#else
      Error("libjpeg-turbo is required for JPEG encoding directly from BGR24 source");
      jpeg_abort_compress( cinfo );
      return(false);                                          
#endif
    } else {
      /* Assume RGB */
/*
#ifdef JCS_EXTENSIONS
      cinfo->out_color_space = JCS_EXT_RGB;
#else
      cinfo->out_color_space = JCS_RGB;
#endif
*/
      cinfo->in_color_space = JCS_RGB;
    }
    break;
    }
  }
  
  jpeg_set_defaults( cinfo );
  jpeg_set_quality( cinfo, quality, FALSE );
  cinfo->dct_method = JDCT_FASTEST;

  jpeg_start_compress( cinfo, TRUE );

  JSAMPROW row_pointer;  /* pointer to a single row */
  int row_stride = cinfo->image_width * colours; /* physical row width in buffer */
  while ( cinfo->next_scanline < cinfo->image_height )
  {
    row_pointer = &buffer[cinfo->next_scanline * row_stride];
    jpeg_write_scanlines( cinfo, &row_pointer, 1 );
  }

  jpeg_finish_compress( cinfo );

  return( true );
}

#if HAVE_ZLIB_H
bool Image::Unzip( const Bytef *inbuffer, unsigned long inbuffer_size )
{
  unsigned long zip_size = size;
  int result = uncompress( buffer, &zip_size, inbuffer, inbuffer_size );
  if ( result != Z_OK )
  {
    Error( "Unzip failed, result = %d", result );
    return( false );
  }
  if ( zip_size != (unsigned int)size )
  {
    Error( "Unzip failed, size mismatch, expected %d bytes, got %ld", size, zip_size );
    return( false );
  }
  return( true );
}

bool Image::Zip( Bytef *outbuffer, unsigned long *outbuffer_size, int compression_level ) const
{
  int result = compress2( outbuffer, outbuffer_size, buffer, size, compression_level );
  if ( result != Z_OK )
  {
    Error( "Zip failed, result = %d", result );
    return( false );
  }
  return( true );
}
#endif // HAVE_ZLIB_H

bool Image::Crop( unsigned int lo_x, unsigned int lo_y, unsigned int hi_x, unsigned int hi_y )
{
  unsigned int new_width = (hi_x-lo_x)+1;
  unsigned int new_height = (hi_y-lo_y)+1;

  if ( lo_x > hi_x || lo_y > hi_y )
  {
    Error( "Invalid or reversed crop region %d,%d -> %d,%d", lo_x, lo_y, hi_x, hi_y );
    return( false );
  }
  if ( lo_x < 0 || hi_x > (width-1) || ( lo_y < 0 || hi_y > (height-1) ) )
  {
    Error( "Attempting to crop outside image, %d,%d -> %d,%d not in %d,%d", lo_x, lo_y, hi_x, hi_y, width-1, height-1 );
    return( false );
  }

  if ( new_width == width && new_height == height )
  {
    return( true );
  }

  unsigned int new_size = new_width*new_height*colours;
  uint8_t *new_buffer = AllocBuffer(new_size);
  
  unsigned int new_stride = new_width*colours;
  for ( unsigned int y = lo_y, ny = 0; y <= hi_y; y++, ny++ )
  {
    unsigned char *pbuf = &buffer[((y*width)+lo_x)*colours];
    unsigned char *pnbuf = &new_buffer[(ny*new_width)*colours];
    memcpy( pnbuf, pbuf, new_stride );
  }

  AssignDirect(new_width, new_height, colours, subpixelorder, new_buffer, new_size, ZM_BUFTYPE_ZM);

  return( true );
}

bool Image::Crop( const Box &limits )
{
  return( Crop( limits.LoX(), limits.LoY(), limits.HiX(), limits.HiY() ) );
}

/* Far from complete */
/* Need to implement all possible of overlays possible */
void Image::Overlay( const Image &image )
{
  if ( !(width == image.width && height == image.height) )
  {
    Panic( "Attempt to overlay different sized images, expected %dx%d, got %dx%d", width, height, image.width, image.height );
  }
  
  if( colours == image.colours && subpixelorder != image.subpixelorder ) {
    Warning("Attempt to overlay images of same format but with different subpixel order.");
  }
  
  /* Grayscale ontop of grayscale - complete */
  if ( colours == ZM_COLOUR_GRAY8 && image.colours == ZM_COLOUR_GRAY8 ) {
    const uint8_t* const max_ptr = buffer+size;
    const uint8_t* psrc = image.buffer;
    uint8_t* pdest = buffer;
    
    while( pdest < max_ptr )
    {
      if ( *psrc )
      {
        *pdest = *psrc;
      }
      pdest++;
      psrc++;
    }
  
  /* RGB24 ontop of grayscale - convert to same format first - complete */
  } else if ( colours == ZM_COLOUR_GRAY8 && image.colours == ZM_COLOUR_RGB24 ) {
    Colourise(image.colours, image.subpixelorder);
    
    const uint8_t* const max_ptr = buffer+size;
    const uint8_t* psrc = image.buffer;
    uint8_t* pdest = buffer;
    
    while( pdest < max_ptr )
    {
      if ( RED_PTR_RGBA(psrc) || GREEN_PTR_RGBA(psrc) || BLUE_PTR_RGBA(psrc) )
      {
        RED_PTR_RGBA(pdest) = RED_PTR_RGBA(psrc);
        GREEN_PTR_RGBA(pdest) = GREEN_PTR_RGBA(psrc);
        BLUE_PTR_RGBA(pdest) = BLUE_PTR_RGBA(psrc);
      }
      pdest += 3;
      psrc += 3;
    }
  
  /* RGB32 ontop of grayscale - convert to same format first - complete */
  } else if( colours == ZM_COLOUR_GRAY8 && image.colours == ZM_COLOUR_RGB32 ) {
    Colourise(image.colours, image.subpixelorder);
    
    const Rgb* const max_ptr = (Rgb*)(buffer+size);
    const Rgb* prsrc = (Rgb*)image.buffer; 
    Rgb* prdest = (Rgb*)buffer;
    
    if(subpixelorder == ZM_SUBPIX_ORDER_RGBA || subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      /* RGB\BGR\RGBA\BGRA subpixel order - Alpha byte is last */
      while (prdest < max_ptr) {
        if ( RED_PTR_RGBA(prsrc) || GREEN_PTR_RGBA(prsrc) || BLUE_PTR_RGBA(prsrc) )
        {
          *prdest = *prsrc;
        }
        prdest++;
        prsrc++;
      }
    } else {
      /* ABGR\ARGB subpixel order - Alpha byte is first */
      while (prdest < max_ptr) {
        if ( RED_PTR_ABGR(prsrc) || GREEN_PTR_ABGR(prsrc) || BLUE_PTR_ABGR(prsrc) )
        {
          *prdest = *prsrc;
        }
        prdest++;
        prsrc++;
      }
    }
  
  /* Grayscale ontop of RGB24 - complete */
  } else if ( colours == ZM_COLOUR_RGB24 && image.colours == ZM_COLOUR_GRAY8 ) {
    const uint8_t* const max_ptr = buffer+size;
    const uint8_t* psrc = image.buffer;
    uint8_t* pdest = buffer;
    
    while( pdest < max_ptr )
    {
      if ( *psrc )
      {
        RED_PTR_RGBA(pdest) = GREEN_PTR_RGBA(pdest) = BLUE_PTR_RGBA(pdest) = *psrc;
      }
      pdest += 3;
      psrc++;
    }
  
  /* RGB24 ontop of RGB24 - not complete. need to take care of different subpixel orders */
  } else if ( colours == ZM_COLOUR_RGB24 && image.colours == ZM_COLOUR_RGB24 ) {
    const uint8_t* const max_ptr = buffer+size;
    const uint8_t* psrc = image.buffer;
    uint8_t* pdest = buffer;
    
    while( pdest < max_ptr )
    {
      if ( RED_PTR_RGBA(psrc) || GREEN_PTR_RGBA(psrc) || BLUE_PTR_RGBA(psrc) )
      {
        RED_PTR_RGBA(pdest) = RED_PTR_RGBA(psrc);
        GREEN_PTR_RGBA(pdest) = GREEN_PTR_RGBA(psrc);
        BLUE_PTR_RGBA(pdest) = BLUE_PTR_RGBA(psrc);
      }
      pdest += 3;
      psrc += 3;
    } 
  
  /* RGB32 ontop of RGB24 - TO BE DONE */
  } else if ( colours == ZM_COLOUR_RGB24 && image.colours == ZM_COLOUR_RGB32 ) {
    Error("Overlay of RGB32 ontop of RGB24 is not supported.");
  
  /* Grayscale ontop of RGB32 - complete */
  } else if ( colours == ZM_COLOUR_RGB32 && image.colours == ZM_COLOUR_GRAY8 ) {
    const Rgb* const max_ptr = (Rgb*)(buffer+size);
    Rgb* prdest = (Rgb*)buffer;
    const uint8_t* psrc = image.buffer;
    
    if(subpixelorder == ZM_SUBPIX_ORDER_RGBA || subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      /* RGBA\BGRA subpixel order - Alpha byte is last */
      while (prdest < max_ptr) {
        if ( *psrc )
        {
          RED_PTR_RGBA(prdest) = GREEN_PTR_RGBA(prdest) = BLUE_PTR_RGBA(prdest) = *psrc;
        }
        prdest++;
        psrc++;
      }
    } else {
      /* ABGR\ARGB subpixel order - Alpha byte is first */
      while (prdest < max_ptr) {
        if ( *psrc )
        {
          RED_PTR_ABGR(prdest) = GREEN_PTR_ABGR(prdest) = BLUE_PTR_ABGR(prdest) = *psrc;
        }
        prdest++;
        psrc++;
      }
    }
  
  /* RGB24 ontop of RGB32 - TO BE DONE */
  } else if ( colours == ZM_COLOUR_RGB32 && image.colours == ZM_COLOUR_RGB24 ) {
    Error("Overlay of RGB24 ontop of RGB32 is not supported.");
  
  /* RGB32 ontop of RGB32 - not complete. need to take care of different subpixel orders */
  } else if ( colours == ZM_COLOUR_RGB32 && image.colours == ZM_COLOUR_RGB32 ) {
    const Rgb* const max_ptr = (Rgb*)(buffer+size);
    Rgb* prdest = (Rgb*)buffer;
    const Rgb* prsrc = (Rgb*)image.buffer; 
    
    if(image.subpixelorder == ZM_SUBPIX_ORDER_RGBA || image.subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      /* RGB\BGR\RGBA\BGRA subpixel order - Alpha byte is last */
      while (prdest < max_ptr) {
        if ( RED_PTR_RGBA(prsrc) || GREEN_PTR_RGBA(prsrc) || BLUE_PTR_RGBA(prsrc) )
        {
          *prdest = *prsrc;
        }
        prdest++;
        prsrc++;
      }
    } else {
      /* ABGR\ARGB subpixel order - Alpha byte is first */
      while (prdest < max_ptr) {
        if ( RED_PTR_ABGR(prsrc) || GREEN_PTR_ABGR(prsrc) || BLUE_PTR_ABGR(prsrc) )
        {
          *prdest = *prsrc;
        }
        prdest++;
        prsrc++;
      }
    }
  }
  
}

/* RGB32 compatible: complete */
void Image::Overlay( const Image &image, unsigned int x, unsigned int y )
{
  if ( !(width < image.width || height < image.height) )
  {
    Panic( "Attempt to overlay image too big for destination, %dx%d > %dx%d", image.width, image.height, width, height );
  }

  if ( !(width < (x+image.width) || height < (y+image.height)) )
  {
    Panic( "Attempt to overlay image outside of destination bounds, %dx%d @ %dx%d > %dx%d", image.width, image.height, x, y, width, height );
  }

  if ( !(colours == image.colours) )
  {
    Panic( "Attempt to partial overlay differently coloured images, expected %d, got %d", colours, image.colours );
  }

  unsigned int lo_x = x;
  unsigned int lo_y = y;
  unsigned int hi_x = (x+image.width)-1;
  unsigned int hi_y = (y+image.height-1);
  if ( colours == ZM_COLOUR_GRAY8 )
  {
    const uint8_t *psrc = image.buffer;
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      uint8_t *pdest = &buffer[(y*width)+lo_x];
      for ( unsigned int x = lo_x; x <= hi_x; x++ )
      {
        *pdest++ = *psrc++;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB24 )
  {
    const uint8_t *psrc = image.buffer;
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      uint8_t *pdest = &buffer[colours*((y*width)+lo_x)];
      for ( unsigned int x = lo_x; x <= hi_x; x++ )
      {
        *pdest++ = *psrc++;
        *pdest++ = *psrc++;
        *pdest++ = *psrc++;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB32 )
  {
    const Rgb *psrc = (Rgb*)(image.buffer);
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      Rgb *pdest = (Rgb*)&buffer[((y*width)+lo_x)<<2];
      for ( unsigned int x = lo_x; x <= hi_x; x++ )
      {
        *pdest++ = *psrc++;
      }
    }
  } else {
    Error("Overlay called with unexpected colours: %d", colours);
  }
  
}

void Image::Blend( const Image &image, int transparency )
{
#ifdef ZM_IMAGE_PROFILING
  struct timespec start,end,diff;
  unsigned long long executetime;
  unsigned long milpixels;
#endif
  uint8_t* new_buffer;
  
  if ( !(width == image.width && height == image.height && colours == image.colours && subpixelorder == image.subpixelorder) )
  {
    Panic( "Attempt to blend different sized images, expected %dx%dx%d %d, got %dx%dx%d %d", width, height, colours, subpixelorder, image.width, image.height, image.colours, image.subpixelorder );
  }
  
  if(transparency <= 0)
    return;
  
  new_buffer = AllocBuffer(size);
  
#ifdef ZM_IMAGE_PROFILING
  clock_gettime(CLOCK_THREAD_CPUTIME_ID,&start);
#endif
  
  /* Do the blending */
  (*fptr_blend)(buffer, image.buffer, new_buffer, size, transparency);
  
#ifdef ZM_IMAGE_PROFILING
  clock_gettime(CLOCK_THREAD_CPUTIME_ID,&end);
  timespec_diff(&start,&end,&diff);
  
  executetime = (1000000000ull * diff.tv_sec) + diff.tv_nsec;
  milpixels = (unsigned long)((long double)size)/((((long double)executetime)/1000));
  Debug(5, "Blend: %u colours blended in %llu nanoseconds, %lu million colours/s\n",size,executetime,milpixels);
#endif
  
  AssignDirect( width, height, colours, subpixelorder, new_buffer, size, ZM_BUFTYPE_ZM);
}

Image *Image::Merge( unsigned int n_images, Image *images[] )
{
  if ( n_images <= 0 ) return( 0 );
  if ( n_images == 1 ) return( new Image( *images[0] ) );

  unsigned int width = images[0]->width;
  unsigned int height = images[0]->height;
  unsigned int colours = images[0]->colours;
  for ( unsigned int i = 1; i < n_images; i++ )
  {
    if ( !(width == images[i]->width && height == images[i]->height && colours == images[i]->colours) )
    {
      Panic( "Attempt to merge different sized images, expected %dx%dx%d, got %dx%dx%d, for image %d", width, height, colours, images[i]->width, images[i]->height, images[i]->colours, i );
    }
  }

  Image *result = new Image( width, height, images[0]->colours, images[0]->subpixelorder);
  unsigned int size = result->size;
  for ( unsigned int i = 0; i < size; i++ )
  {
    unsigned int total = 0;
    uint8_t *pdest = result->buffer;
    for ( unsigned int j = 0; j < n_images; j++ )
    {
      uint8_t *psrc = images[j]->buffer;
      total += *psrc;
      psrc++;
    }
    *pdest = total/n_images;
    pdest++;
  }
  return( result );
}

Image *Image::Merge( unsigned int n_images, Image *images[], double weight )
{
  if ( n_images <= 0 ) return( 0 );
  if ( n_images == 1 ) return( new Image( *images[0] ) );

  unsigned int width = images[0]->width;
  unsigned int height = images[0]->height;
  unsigned int colours = images[0]->colours;
  for ( unsigned int i = 1; i < n_images; i++ )
  {
    if ( !(width == images[i]->width && height == images[i]->height && colours == images[i]->colours) )
    {
      Panic( "Attempt to merge different sized images, expected %dx%dx%d, got %dx%dx%d, for image %d", width, height, colours, images[i]->width, images[i]->height, images[i]->colours, i );
    }
  }

  Image *result = new Image( *images[0] );
  unsigned int size = result->size;
  double factor = 1.0*weight;
  for ( unsigned int i = 1; i < n_images; i++ )
  {
    uint8_t *pdest = result->buffer;
    uint8_t *psrc = images[i]->buffer;
    for ( unsigned int j = 0; j < size; j++ )
    {
      *pdest = (uint8_t)(((*pdest)*(1.0-factor))+((*psrc)*factor));
      pdest++;
      psrc++;
    }
    factor *= weight;
  }
  return( result );
}

Image *Image::Highlight( unsigned int n_images, Image *images[], const Rgb threshold, const Rgb ref_colour )
{
  if ( n_images <= 0 ) return( 0 );
  if ( n_images == 1 ) return( new Image( *images[0] ) );

  unsigned int width = images[0]->width;
  unsigned int height = images[0]->height;
  unsigned int colours = images[0]->colours;
  for ( unsigned int i = 1; i < n_images; i++ )
  {
    if ( !(width == images[i]->width && height == images[i]->height && colours == images[i]->colours) )
    {
      Panic( "Attempt to highlight different sized images, expected %dx%dx%d, got %dx%dx%d, for image %d", width, height, colours, images[i]->width, images[i]->height, images[i]->colours, i );
    }
  }

  Image *result = new Image( width, height, images[0]->colours, images[0]->subpixelorder );
  unsigned int size = result->size;
  for ( unsigned int c = 0; c < colours; c++ )
  {
    for ( unsigned int i = 0; i < size; i++ )
    {
      unsigned int count = 0;
      uint8_t *pdest = result->buffer+c;
      for ( unsigned int j = 0; j < n_images; j++ )
      {
        uint8_t *psrc = images[j]->buffer+c;

#ifndef SOLARIS
        if ( (unsigned)abs((*psrc)-RGB_VAL(ref_colour,c)) >= RGB_VAL(threshold,c) )
#else
        if ( (unsigned)std::abs((*psrc)-RGB_VAL(ref_colour,c)) >= RGB_VAL(threshold,c) )
#endif
        {
          count++;
        }
        psrc += colours;
      }
      *pdest = (count*255)/n_images;
      pdest += 3;
    }
  }
  return( result );
}

/* New function to allow buffer re-using instead of allocationg memory for the delta image every time */
void Image::Delta( const Image &image, Image* targetimage) const
{
#ifdef ZM_IMAGE_PROFILING
  struct timespec start,end,diff;
  unsigned long long executetime;
  unsigned long milpixels;
#endif
  
  if ( !(width == image.width && height == image.height && colours == image.colours && subpixelorder == image.subpixelorder) )
  {
    Panic( "Attempt to get delta of different sized images, expected %dx%dx%d %d, got %dx%dx%d %d", width, height, colours, subpixelorder, image.width, image.height, image.colours, image.subpixelorder);
  }
  
  uint8_t *pdiff = targetimage->WriteBuffer(width, height, ZM_COLOUR_GRAY8, ZM_SUBPIX_ORDER_NONE);
  
  if(pdiff == NULL) {
    Panic("Failed requesting writeable buffer for storing the delta image");
  }
  
#ifdef ZM_IMAGE_PROFILING
  clock_gettime(CLOCK_THREAD_CPUTIME_ID,&start);
#endif
  
  switch(colours) {
    case ZM_COLOUR_RGB24:
    {
    if(subpixelorder == ZM_SUBPIX_ORDER_BGR) {
      /* BGR subpixel order */
      (*fptr_delta8_bgr)(buffer, image.buffer, pdiff, pixels);
    } else {
      /* Assume RGB subpixel order */
      (*fptr_delta8_rgb)(buffer, image.buffer, pdiff, pixels);
    }
    break;
    }
    case ZM_COLOUR_RGB32:
    {
    if(subpixelorder == ZM_SUBPIX_ORDER_ARGB) {
      /* ARGB subpixel order */
      (*fptr_delta8_argb)(buffer, image.buffer, pdiff, pixels);
    } else if(subpixelorder == ZM_SUBPIX_ORDER_ABGR) {
      /* ABGR subpixel order */
      (*fptr_delta8_abgr)(buffer, image.buffer, pdiff, pixels);
    } else if(subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      /* BGRA subpixel order */
      (*fptr_delta8_bgra)(buffer, image.buffer, pdiff, pixels);
    } else {
      /* Assume RGBA subpixel order */
      (*fptr_delta8_rgba)(buffer, image.buffer, pdiff, pixels);
    }
    break;
    }
    case ZM_COLOUR_GRAY8:
    (*fptr_delta8_gray8)(buffer, image.buffer, pdiff, pixels);
    break;
    default:
    Panic("Delta called with unexpected colours: %d",colours);
    break;
  }
  
#ifdef ZM_IMAGE_PROFILING
  clock_gettime(CLOCK_THREAD_CPUTIME_ID,&end);
  timespec_diff(&start,&end,&diff);
  
  executetime = (1000000000ull * diff.tv_sec) + diff.tv_nsec;
  milpixels = (unsigned long)((long double)pixels)/((((long double)executetime)/1000));
  Debug(5, "Delta: %u delta pixels generated in %llu nanoseconds, %lu million pixels/s\n",pixels,executetime,milpixels);
#endif
}

const Coord Image::centreCoord( const char *text ) const
{
  int index = 0;
  int line_no = 0;
  int text_len = strlen( text );
  int line_len = 0;
  int max_line_len = 0;
  const char *line = text;

  while ( (index < text_len) && (line_len = strcspn( line, "\n" )) )
  {
    if ( line_len > max_line_len )
      max_line_len = line_len;

    index += line_len;
    while ( text[index] == '\n' )
    {
      index++;
    }
    line = text+index;
    line_no++;
  }
  int x = (width - (max_line_len * CHAR_WIDTH) ) / 2;
  int y = (height - (line_no * LINE_HEIGHT) ) / 2;
  return( Coord( x, y ) );
}

/* RGB32 compatible: complete */
void Image::MaskPrivacy( const unsigned char *p_bitmask, const Rgb pixel_colour )
{
  const uint8_t pixel_r_col = RED_VAL_RGBA(pixel_colour);
  const uint8_t pixel_g_col = GREEN_VAL_RGBA(pixel_colour);
  const uint8_t pixel_b_col = BLUE_VAL_RGBA(pixel_colour);
  const uint8_t pixel_bw_col = pixel_colour & 0xff;
  const Rgb pixel_rgb_col = rgb_convert(pixel_colour,subpixelorder);

  unsigned char *ptr = &buffer[0];
  unsigned int i = 0;

  for ( unsigned int y = 0; y < height; y++ )
  {
    if ( colours == ZM_COLOUR_GRAY8 )
    {
      for ( unsigned int x = 0; x < width; x++, ptr++ )
      {
        if ( p_bitmask[i] )
          *ptr = pixel_bw_col;
        i++;
      }
    }
    else if ( colours == ZM_COLOUR_RGB24 )
    {
      for ( unsigned int x = 0; x < width; x++, ptr += colours )
      {
        if ( p_bitmask[i] )
        {
          RED_PTR_RGBA(ptr) = pixel_r_col;
          GREEN_PTR_RGBA(ptr) = pixel_g_col;
          BLUE_PTR_RGBA(ptr) = pixel_b_col;
        }
        i++;
      }
    }
    else if ( colours == ZM_COLOUR_RGB32 )
  {
      for ( unsigned int x = 0; x < width; x++, ptr += colours )
      {
        Rgb *temp_ptr = (Rgb*)ptr;
        if ( p_bitmask[i] )
          *temp_ptr = pixel_rgb_col;
        i++;
      }
  } else {
    Panic("MaskPrivacy called with unexpected colours: %d", colours);
    return;
  }

  }
}

/* RGB32 compatible: complete */
void Image::Annotate( const char *p_text, const Coord &coord, const unsigned int size, const Rgb fg_colour, const Rgb bg_colour )
{
  strncpy( text, p_text, sizeof(text) );

  unsigned int index = 0;
  unsigned int line_no = 0;
  unsigned int text_len = strlen( text );
  unsigned int line_len = 0;
  const char *line = text;

  const uint8_t fg_r_col = RED_VAL_RGBA(fg_colour);
  const uint8_t fg_g_col = GREEN_VAL_RGBA(fg_colour);
  const uint8_t fg_b_col = BLUE_VAL_RGBA(fg_colour);
  const uint8_t fg_bw_col = fg_colour & 0xff;
  const Rgb fg_rgb_col = rgb_convert(fg_colour,subpixelorder);
  const bool fg_trans = (fg_colour == RGB_TRANSPARENT);
  
  const uint8_t bg_r_col = RED_VAL_RGBA(bg_colour);
  const uint8_t bg_g_col = GREEN_VAL_RGBA(bg_colour);
  const uint8_t bg_b_col = BLUE_VAL_RGBA(bg_colour);
  const uint8_t bg_bw_col = bg_colour & 0xff;
  const Rgb bg_rgb_col = rgb_convert(bg_colour,subpixelorder);
  const bool bg_trans = (bg_colour == RGB_TRANSPARENT);

  int zm_text_bitmask = 0x80;
  if (size == 2)
    zm_text_bitmask = 0x8000;

  while ( (index < text_len) && (line_len = strcspn( line, "\n" )) )
  {

    unsigned int line_width = line_len * CHAR_WIDTH * size;

    unsigned int lo_line_x = coord.X();
    unsigned int lo_line_y = coord.Y() + (line_no * LINE_HEIGHT * size);

    unsigned int min_line_x = 0;
    unsigned int max_line_x = width - line_width;
    unsigned  int min_line_y = 0;
    unsigned int max_line_y = height - (LINE_HEIGHT * size);

    if ( lo_line_x > max_line_x )
      lo_line_x = max_line_x;
    if ( lo_line_x < min_line_x )
      lo_line_x = min_line_x;
    if ( lo_line_y > max_line_y )
      lo_line_y = max_line_y;
    if ( lo_line_y < min_line_y )
      lo_line_y = min_line_y;

    unsigned int hi_line_x = lo_line_x + line_width;
    unsigned int hi_line_y = lo_line_y + (LINE_HEIGHT * size);

    // Clip anything that runs off the right of the screen
    if ( hi_line_x > width )
      hi_line_x = width;
    if ( hi_line_y > height )
      hi_line_y = height;

    if ( colours == ZM_COLOUR_GRAY8 )
    {
      unsigned char *ptr = &buffer[(lo_line_y*width)+lo_line_x];
      for ( unsigned int y = lo_line_y, r = 0; y < hi_line_y && r < (CHAR_HEIGHT * size); y++, r++, ptr += width )
      {
        unsigned char *temp_ptr = ptr;
        for ( unsigned int x = lo_line_x, c = 0; x < hi_line_x && c < line_len; c++ )
        {
          int f;
          if (size == 2)
            f = bigfontdata[(line[c] * CHAR_HEIGHT * size) + r];
          else
            f = fontdata[(line[c] * CHAR_HEIGHT) + r];
          for ( unsigned int i = 0; i < (CHAR_WIDTH * size) && x < hi_line_x; i++, x++, temp_ptr++ )
          {
            if ( f & (zm_text_bitmask >> i) )
            {
              if ( !fg_trans )
                *temp_ptr = fg_bw_col;
            }
            else if ( !bg_trans )
            {
              *temp_ptr = bg_bw_col;
            }
          }
        }
      }
    }
    else if ( colours == ZM_COLOUR_RGB24 )
    {
      unsigned int wc = width * colours;

      unsigned char *ptr = &buffer[((lo_line_y*width)+lo_line_x)*colours];
      for ( unsigned int y = lo_line_y, r = 0; y < hi_line_y && r < (CHAR_HEIGHT * size); y++, r++, ptr += wc )
      {
        unsigned char *temp_ptr = ptr;
        for ( unsigned int x = lo_line_x, c = 0; x < hi_line_x && c < line_len; c++ )
        {
          int f;
          if (size == 2)
            f = bigfontdata[(line[c] * CHAR_HEIGHT * size) + r];
          else
            f = fontdata[(line[c] * CHAR_HEIGHT) + r];
          for ( unsigned int i = 0; i < (CHAR_WIDTH * size) && x < hi_line_x; i++, x++, temp_ptr += colours )
          {
            if ( f & (zm_text_bitmask >> i) )
            {
              if ( !fg_trans )
              {
                RED_PTR_RGBA(temp_ptr) = fg_r_col;
                GREEN_PTR_RGBA(temp_ptr) = fg_g_col;
                BLUE_PTR_RGBA(temp_ptr) = fg_b_col;
              }
            }
            else if ( !bg_trans )
            {
              RED_PTR_RGBA(temp_ptr) = bg_r_col;
              GREEN_PTR_RGBA(temp_ptr) = bg_g_col;
              BLUE_PTR_RGBA(temp_ptr) = bg_b_col;
            }
          }
        }
      }
    } 
    else if ( colours == ZM_COLOUR_RGB32 )
  {
      unsigned int wc = width * colours;

      uint8_t *ptr = &buffer[((lo_line_y*width)+lo_line_x)<<2];
      for ( unsigned int y = lo_line_y, r = 0; y < hi_line_y && r < (CHAR_HEIGHT * size); y++, r++, ptr += wc )
      {
        Rgb* temp_ptr = (Rgb*)ptr;
        for ( unsigned int x = lo_line_x, c = 0; x < hi_line_x && c < line_len; c++ )
        {
          int f;
          if (size == 2)
            f = bigfontdata[(line[c] * CHAR_HEIGHT * size) + r];
          else
            f = fontdata[(line[c] * CHAR_HEIGHT) + r];
          for ( unsigned int i = 0; i < (CHAR_WIDTH * size) && x < hi_line_x; i++, x++, temp_ptr++ )
          {
            if ( f & (zm_text_bitmask >> i) )
            {
              if ( !fg_trans )
              {
        *temp_ptr = fg_rgb_col;
              }
            }
            else if ( !bg_trans )
            {
        *temp_ptr = bg_rgb_col;
            }
          }
        }
      } 
  
  } else {
    Panic("Annotate called with unexpected colours: %d",colours);
    return;
  }
  
    index += line_len;
    while ( text[index] == '\n' )
    {
      index++;
    }
    line = text+index;
    line_no++;
  }
}

void Image::Timestamp( const char *label, const time_t when, const Coord &coord, const int size )
{
  char time_text[64];
  strftime( time_text, sizeof(time_text), "%y/%m/%d %H:%M:%S", localtime( &when ) );
  char text[64];
  if ( label )
  {
    snprintf( text, sizeof(text), "%s - %s", label, time_text );
    Annotate( text, coord, size );
  }
  else
  {
    Annotate( time_text, coord, size );
  }
}

/* RGB32 compatible: complete */
void Image::Colourise(const unsigned int p_reqcolours, const unsigned int p_reqsubpixelorder)
{
  Debug(9, "Colourise: Req colours: %u Req subpixel order: %u Current colours: %u Current subpixel order: %u",p_reqcolours,p_reqsubpixelorder,colours,subpixelorder);
  
  if ( colours != ZM_COLOUR_GRAY8) {
    Warning("Target image is already colourised, colours: %u",colours);
    return;
  }
  
  if ( p_reqcolours == ZM_COLOUR_RGB32 ) {
    /* RGB32 */
    Rgb* new_buffer = (Rgb*)AllocBuffer(pixels*sizeof(Rgb));
    
    const uint8_t *psrc = buffer;
    Rgb* pdest = new_buffer;
    Rgb subpixel;
    Rgb newpixel;
    
    if ( p_reqsubpixelorder == ZM_SUBPIX_ORDER_ABGR || p_reqsubpixelorder == ZM_SUBPIX_ORDER_ARGB) {
      /* ARGB\ABGR subpixel order. alpha byte is first (mem+0), so we need to shift the pixel left in the end */
      for(unsigned int i=0;i<pixels;i++) {
        newpixel = subpixel = psrc[i];
        newpixel = (newpixel<<8) | subpixel;
        newpixel = (newpixel<<8) | subpixel;
        pdest[i] = (newpixel<<8);
      }    
    } else {
      /* RGBA\BGRA subpixel order, alpha byte is last (mem+3) */
      for(unsigned int i=0;i<pixels;i++) {
        newpixel = subpixel = psrc[i];
        newpixel = (newpixel<<8) | subpixel;
        newpixel = (newpixel<<8) | subpixel;
        pdest[i] = newpixel;
      }
    }

    /* Directly assign the new buffer and make sure it will be freed when not needed anymore */
    AssignDirect( width, height, p_reqcolours, p_reqsubpixelorder, (uint8_t*)new_buffer, pixels*4, ZM_BUFTYPE_ZM);

  } else if(p_reqcolours == ZM_COLOUR_RGB24 ) {
    /* RGB24 */
    uint8_t *new_buffer = AllocBuffer(pixels*3);
    
    uint8_t *pdest = new_buffer;
    const uint8_t *psrc = buffer;
    
    for(unsigned int i=0;i<(unsigned int)pixels;i++, pdest += 3)
    {
      RED_PTR_RGBA(pdest) = GREEN_PTR_RGBA(pdest) = BLUE_PTR_RGBA(pdest) = psrc[i];
    }
    
    /* Directly assign the new buffer and make sure it will be freed when not needed anymore */
    AssignDirect( width, height, p_reqcolours, p_reqsubpixelorder, new_buffer, pixels*3, ZM_BUFTYPE_ZM);
  } else {
    Error("Colourise called with unexpected colours: %d",colours);
    return;
  }
  
}

/* RGB32 compatible: complete */
void Image::DeColourise()
{
  colours = ZM_COLOUR_GRAY8;
  subpixelorder = ZM_SUBPIX_ORDER_NONE;
  size = width * height;
  
  if ( colours == ZM_COLOUR_RGB32 )
  {
    switch(subpixelorder) {
      case ZM_SUBPIX_ORDER_BGRA:
      std_convert_bgra_gray8(buffer,buffer,pixels);
      break;
      case ZM_SUBPIX_ORDER_ARGB:
      std_convert_argb_gray8(buffer,buffer,pixels);
      break;
      case ZM_SUBPIX_ORDER_ABGR:
      std_convert_abgr_gray8(buffer,buffer,pixels);
      break;
      case ZM_SUBPIX_ORDER_RGBA:
      default:
      std_convert_rgba_gray8(buffer,buffer,pixels);
      break;
    }
  } else {
    /* Assume RGB24 */
    switch(subpixelorder) {
      case ZM_SUBPIX_ORDER_BGR:
      std_convert_bgr_gray8(buffer,buffer,pixels);
      break;
      case ZM_SUBPIX_ORDER_RGB:
      default:
      std_convert_rgb_gray8(buffer,buffer,pixels);
      break;
    }
    
  }
}

/* RGB32 compatible: complete */
void Image::Fill( Rgb colour, const Box *limits )
{
  if ( !(colours == ZM_COLOUR_GRAY8 || colours == ZM_COLOUR_RGB24 || colours == ZM_COLOUR_RGB32 ) )
  {
    Panic( "Attempt to fill image with unexpected colours %d", colours );
  }
  
  /* Convert the colour's RGBA subpixel order into the image's subpixel order */
  colour = rgb_convert(colour,subpixelorder);
  
  unsigned int lo_x = limits?limits->Lo().X():0;
  unsigned int lo_y = limits?limits->Lo().Y():0;
  unsigned int hi_x = limits?limits->Hi().X():width-1;
  unsigned int hi_y = limits?limits->Hi().Y():height-1;
  if ( colours == ZM_COLOUR_GRAY8 )
  {
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      unsigned char *p = &buffer[(y*width)+lo_x];
      for ( unsigned int x = lo_x; x <= hi_x; x++, p++)
      {
        *p = colour;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB24 )
  {
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      unsigned char *p = &buffer[colours*((y*width)+lo_x)];
      for ( unsigned int x = lo_x; x <= hi_x; x++, p += 3)
      {
        RED_PTR_RGBA(p) = RED_VAL_RGBA(colour);
        GREEN_PTR_RGBA(p) = GREEN_VAL_RGBA(colour);
        BLUE_PTR_RGBA(p) = BLUE_VAL_RGBA(colour);
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB32 ) /* RGB32 */
  {
    for ( unsigned int y = lo_y; y <= (unsigned int)hi_y; y++ )
    {
      Rgb *p = (Rgb*)&buffer[((y*width)+lo_x)<<2];
      
      for ( unsigned int x = lo_x; x <= (unsigned int)hi_x; x++, p++)
      {
        /* Fast, copies the entire pixel in a single pass */ 
        *p = colour;
      }
    }
  }
}

/* RGB32 compatible: complete */
void Image::Fill( Rgb colour, int density, const Box *limits )
{
  /* Allow the faster version to be used if density is not used (density=1) */
  if(density <= 1)
    return Fill(colour,limits);
  
  if ( !(colours == ZM_COLOUR_GRAY8 || colours == ZM_COLOUR_RGB24 || colours == ZM_COLOUR_RGB32  ) )
  {
    Panic( "Attempt to fill image with unexpected colours %d", colours );
  }
  
  /* Convert the colour's RGBA subpixel order into the image's subpixel order */
  colour = rgb_convert(colour,subpixelorder);

  unsigned int lo_x = limits?limits->Lo().X():0;
  unsigned int lo_y = limits?limits->Lo().Y():0;
  unsigned int hi_x = limits?limits->Hi().X():width-1;
  unsigned int hi_y = limits?limits->Hi().Y():height-1;
  if ( colours == ZM_COLOUR_GRAY8 )
  {
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      unsigned char *p = &buffer[(y*width)+lo_x];
      for ( unsigned int x = lo_x; x <= hi_x; x++, p++)
      {
        if ( ( x == lo_x || x == hi_x || y == lo_y || y == hi_y ) || (!(x%density) && !(y%density) ) )
          *p = colour;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB24 )
  {
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      unsigned char *p = &buffer[colours*((y*width)+lo_x)];
      for ( unsigned int x = lo_x; x <= hi_x; x++, p += 3)
      {
        if ( ( x == lo_x || x == hi_x || y == lo_y || y == hi_y ) || (!(x%density) && !(y%density) ) ) {
          RED_PTR_RGBA(p) = RED_VAL_RGBA(colour);
          GREEN_PTR_RGBA(p) = GREEN_VAL_RGBA(colour);
          BLUE_PTR_RGBA(p) = BLUE_VAL_RGBA(colour);
        }
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB32 ) /* RGB32 */
  {
    for ( unsigned int y = lo_y; y <= hi_y; y++ )
    {
      Rgb* p = (Rgb*)&buffer[((y*width)+lo_x)<<2];

      for ( unsigned int x = lo_x; x <= hi_x; x++, p++)
      {
        if ( ( x == lo_x || x == hi_x || y == lo_y || y == hi_y ) || (!(x%density) && !(y%density) ) )
          /* Fast, copies the entire pixel in a single pass */
          *p = colour;
      }
    }
  }  
  
}

/* RGB32 compatible: complete */
void Image::Outline( Rgb colour, const Polygon &polygon )
{
  if ( !(colours == ZM_COLOUR_GRAY8 || colours == ZM_COLOUR_RGB24 || colours == ZM_COLOUR_RGB32 ) )
  {
    Panic( "Attempt to outline image with unexpected colours %d", colours );
  }
  
  /* Convert the colour's RGBA subpixel order into the image's subpixel order */
  colour = rgb_convert(colour,subpixelorder);
  
  int n_coords = polygon.getNumCoords();
  for ( int j = 0, i = n_coords-1; j < n_coords; i = j++ )
  {
    const Coord &p1 = polygon.getCoord( i );
    const Coord &p2 = polygon.getCoord( j );

    int x1 = p1.X();
    int x2 = p2.X();
    int y1 = p1.Y();
    int y2 = p2.Y();

    double dx = x2 - x1;
    double dy = y2 - y1;

    double grad;

    //Debug( 9, "dx: %.2lf, dy: %.2lf", dx, dy );
    if ( fabs(dx) <= fabs(dy) )
    {
      //Debug( 9, "dx <= dy" );
      if ( y1 != y2 )
        grad = dx/dy;
      else
        grad = width;

      double x;
      int y, yinc = (y1<y2)?1:-1;
      grad *= yinc;
      if ( colours == ZM_COLOUR_GRAY8 )
      {
        //Debug( 9, "x1:%d, x2:%d, y1:%d, y2:%d, gr:%.2f", x1, x2, y1, y2, grad );
        for ( x = x1, y = y1; y != y2; y += yinc, x += grad )
        {
          //Debug( 9, "x:%.2f, y:%d", x, y );
          buffer[(y*width)+int(round(x))] = colour;
        }
      }
      else if ( colours == ZM_COLOUR_RGB24 )
      {
        for ( x = x1, y = y1; y != y2; y += yinc, x += grad )
        {
          unsigned char *p = &buffer[colours*((y*width)+int(round(x)))];
          RED_PTR_RGBA(p) = RED_VAL_RGBA(colour);
          GREEN_PTR_RGBA(p) = GREEN_VAL_RGBA(colour);
          BLUE_PTR_RGBA(p) = BLUE_VAL_RGBA(colour);
        }
      }
      else if ( colours == ZM_COLOUR_RGB32 )
      {
        for ( x = x1, y = y1; y != y2; y += yinc, x += grad )
        {
          *(Rgb*)(buffer+(((y*width)+int(round(x)))<<2)) = colour;
        }
      }
    }
    else
    {
      //Debug( 9, "dx > dy" );
      if ( x1 != x2 )
        grad = dy/dx;
      else
        grad = height;
      //Debug( 9, "grad: %.2lf", grad );

      double y;
      int x, xinc = (x1<x2)?1:-1;
      grad *= xinc;
      if ( colours == ZM_COLOUR_GRAY8 )
      {
        //Debug( 9, "x1:%d, x2:%d, y1:%d, y2:%d, gr:%.2lf", x1, x2, y1, y2, grad );
        for ( y = y1, x = x1; x != x2; x += xinc, y += grad )
        {
          //Debug( 9, "x:%d, y:%.2f", x, y );
          buffer[(int(round(y))*width)+x] = colour;
        }
      }
      else if ( colours == ZM_COLOUR_RGB24 )
      {
        for ( y = y1, x = x1; x != x2; x += xinc, y += grad )
        {
          unsigned char *p = &buffer[colours*((int(round(y))*width)+x)];
          RED_PTR_RGBA(p) = RED_VAL_RGBA(colour);
          GREEN_PTR_RGBA(p) = GREEN_VAL_RGBA(colour);
          BLUE_PTR_RGBA(p) = BLUE_VAL_RGBA(colour);
        }
      }
      else if ( colours == ZM_COLOUR_RGB32 )
      {
        for ( y = y1, x = x1; x != x2; x += xinc, y += grad )
        {
          *(Rgb*)(buffer+(((int(round(y))*width)+x)<<2)) = colour;
        }
      }
      
    }
  }
}

/* RGB32 compatible: complete */
void Image::Fill( Rgb colour, int density, const Polygon &polygon )
{
  if ( !(colours == ZM_COLOUR_GRAY8 || colours == ZM_COLOUR_RGB24 || colours == ZM_COLOUR_RGB32 ) )
  {
    Panic( "Attempt to fill image with unexpected colours %d", colours );
  }
  
  /* Convert the colour's RGBA subpixel order into the image's subpixel order */
  colour = rgb_convert(colour,subpixelorder);

  int n_coords = polygon.getNumCoords();
  int n_global_edges = 0;
  Edge global_edges[n_coords];
  for ( int j = 0, i = n_coords-1; j < n_coords; i = j++ )
  {
    const Coord &p1 = polygon.getCoord( i );
    const Coord &p2 = polygon.getCoord( j );

    int x1 = p1.X();
    int x2 = p2.X();
    int y1 = p1.Y();
    int y2 = p2.Y();

    //Debug( 9, "x1:%d,y1:%d x2:%d,y2:%d", x1, y1, x2, y2 );
    if ( y1 == y2 )
      continue;

    double dx = x2 - x1;
    double dy = y2 - y1;

    global_edges[n_global_edges].min_y = y1<y2?y1:y2;
    global_edges[n_global_edges].max_y = y1<y2?y2:y1;
    global_edges[n_global_edges].min_x = y1<y2?x1:x2;
    global_edges[n_global_edges]._1_m = dx/dy;
    n_global_edges++;
  }
  qsort( global_edges, n_global_edges, sizeof(*global_edges), Edge::CompareYX );

#ifndef ZM_DBG_OFF
  if ( logLevel() >= Logger::DEBUG9 )
  {
    for ( int i = 0; i < n_global_edges; i++ )
    {
      Debug( 9, "%d: min_y: %d, max_y:%d, min_x:%.2f, 1/m:%.2f", i, global_edges[i].min_y, global_edges[i].max_y, global_edges[i].min_x, global_edges[i]._1_m );
    }
  }
#endif

  int n_active_edges = 0;
  Edge active_edges[n_global_edges];
  int y = global_edges[0].min_y;
  do 
  {
    for ( int i = 0; i < n_global_edges; i++ )
    {
      if ( global_edges[i].min_y == y )
      {
        Debug( 9, "Moving global edge" );
        active_edges[n_active_edges++] = global_edges[i];
        if ( i < (n_global_edges-1) )
        {
          //memcpy( &global_edges[i], &global_edges[i+1], sizeof(*global_edges)*(n_global_edges-i) );
          memmove( &global_edges[i], &global_edges[i+1], sizeof(*global_edges)*(n_global_edges-i) );
          i--;
        }
        n_global_edges--;
      }
      else
      {
        break;
      }
    }
    qsort( active_edges, n_active_edges, sizeof(*active_edges), Edge::CompareX );
#ifndef ZM_DBG_OFF
    if ( logLevel() >= Logger::DEBUG9 )
    {
      for ( int i = 0; i < n_active_edges; i++ )
      {
        Debug( 9, "%d - %d: min_y: %d, max_y:%d, min_x:%.2f, 1/m:%.2f", y, i, active_edges[i].min_y, active_edges[i].max_y, active_edges[i].min_x, active_edges[i]._1_m );
      }
    }
#endif
    if ( !(y%density) )
    {
      //Debug( 9, "%d", y );
      for ( int i = 0; i < n_active_edges; )
      {
        int lo_x = int(round(active_edges[i++].min_x));
        int hi_x = int(round(active_edges[i++].min_x));
        if( colours == ZM_COLOUR_GRAY8 ) {
          unsigned char *p = &buffer[(y*width)+lo_x];
          for ( int x = lo_x; x <= hi_x; x++, p++)
          {
            if ( !(x%density) )
            {
              //Debug( 9, " %d", x );
              *p = colour;
            }
          }
        } else if( colours == ZM_COLOUR_RGB24 ) {
          unsigned char *p = &buffer[colours*((y*width)+lo_x)];
          for ( int x = lo_x; x <= hi_x; x++, p += 3)
          {
            if ( !(x%density) )
            {  
              RED_PTR_RGBA(p) = RED_VAL_RGBA(colour);
              GREEN_PTR_RGBA(p) = GREEN_VAL_RGBA(colour);
              BLUE_PTR_RGBA(p) = BLUE_VAL_RGBA(colour);
            }
          }
        } else if( colours == ZM_COLOUR_RGB32 ) {
          Rgb *p = (Rgb*)&buffer[((y*width)+lo_x)<<2];
          for ( int x = lo_x; x <= hi_x; x++, p++)
          {
            if ( !(x%density) )
            {
              /* Fast, copies the entire pixel in a single pass */
              *p = colour;
            }
          }
        }
      }
    }
    y++;
    for ( int i = n_active_edges-1; i >= 0; i-- )
    {
      if ( y >= active_edges[i].max_y ) // Or >= as per sheets
      {
        Debug( 9, "Deleting active_edge" );
        if ( i < (n_active_edges-1) )
        {
          //memcpy( &active_edges[i], &active_edges[i+1], sizeof(*active_edges)*(n_active_edges-i) );
          memmove( &active_edges[i], &active_edges[i+1], sizeof(*active_edges)*(n_active_edges-i) );
        }
        n_active_edges--;
      }
      else
      {
        active_edges[i].min_x += active_edges[i]._1_m;
      }
    }
  } while ( n_global_edges || n_active_edges );
}

void Image::Fill( Rgb colour, const Polygon &polygon )
{
  Fill( colour, 1, polygon );
}

/* RGB32 compatible: complete */
void Image::Rotate( int angle )
{
  
  angle %= 360;

  if ( !angle )
  {
    return;
  }
  if ( angle%90 )
  {
    return;
  }
  
  unsigned int new_height = height;
  unsigned int new_width = width;
  uint8_t* rotate_buffer = AllocBuffer(size);

  switch( angle )
  {
    case 90 :
    {
      new_height = width;
      new_width = height;

      unsigned int line_bytes = new_width*colours;
      unsigned char *s_ptr = buffer;

      if ( colours == ZM_COLOUR_GRAY8 )
      {
        unsigned char *d_ptr;
        for ( unsigned int i = new_width; i > 0; i-- )
        {
          d_ptr = rotate_buffer+(i-1);
          for ( unsigned int j = new_height; j > 0; j-- )
          {
            *d_ptr = *s_ptr++;
            d_ptr += line_bytes;
          }
        }
      }
      else if ( colours == ZM_COLOUR_RGB32 )
      {
        Rgb* s_rptr = (Rgb*)s_ptr;
        Rgb* d_rptr;
        for ( unsigned int i = new_width; i > 0; i-- )
        {
          d_rptr = (Rgb*)(rotate_buffer+((i-1)<<2));
          for ( unsigned int j = new_height; j > 0; j-- )
          {
            *d_rptr = *s_rptr++;
            d_rptr += new_width;
          }
        }
      }
      else /* Assume RGB24 */
      {
        unsigned char *d_ptr;
        for ( unsigned int i = new_width; i > 0; i-- )
        {
          d_ptr = rotate_buffer+((i-1)*3);
          for ( unsigned int j = new_height; j > 0; j-- )
          {
            *d_ptr = *s_ptr++;
            *(d_ptr+1) = *s_ptr++;
            *(d_ptr+2) = *s_ptr++;
            d_ptr += line_bytes;
          }
        }
      }
      break;
    }
    case 180 :
    {
      unsigned char *s_ptr = buffer+size;
      unsigned char *d_ptr = rotate_buffer;

      if ( colours == ZM_COLOUR_GRAY8 )
      {
        while( s_ptr > buffer )
        {
          s_ptr--;
          *d_ptr++ = *s_ptr;
        }
      }
      else if ( colours == ZM_COLOUR_RGB32 )
      {
        Rgb* s_rptr = (Rgb*)s_ptr;
        Rgb* d_rptr = (Rgb*)d_ptr;
        while( s_rptr > (Rgb*)buffer )
        {
          s_rptr--;
          *d_rptr++ = *s_rptr;
        }
      }
      else /* Assume RGB24 */
      {
        while( s_ptr > buffer )
        {
          s_ptr -= 3;
          *d_ptr++ = *s_ptr;
          *d_ptr++ = *(s_ptr+1);
          *d_ptr++ = *(s_ptr+2);
        }
      }
      break;
    }
    case 270 :
    {
      new_height = width;
      new_width = height;

      unsigned int line_bytes = new_width*colours;
      unsigned char *s_ptr = buffer+size;

      if ( colours == ZM_COLOUR_GRAY8 )
      {
        unsigned char *d_ptr;
        for ( unsigned int i = new_width; i > 0; i-- )
        {
          d_ptr = rotate_buffer+(i-1);
          for ( unsigned int j = new_height; j > 0; j-- )
          {
            s_ptr--;
            *d_ptr = *s_ptr;
            d_ptr += line_bytes;
          }
        }
      }
      else if ( colours == ZM_COLOUR_RGB32 )
      {
        Rgb* s_rptr = (Rgb*)s_ptr;
        Rgb* d_rptr;
        for ( unsigned int i = new_width; i > 0; i-- )
        {
          d_rptr = (Rgb*)(rotate_buffer+((i-1)<<2));
          for ( unsigned int j = new_height; j > 0; j-- )
          {
            s_rptr--;
            *d_rptr = *s_rptr;
            d_rptr += new_width;
          }
        }
      }
      else /* Assume RGB24 */
      {
        unsigned char *d_ptr;
        for ( unsigned int i = new_width; i > 0; i-- )
        {
          d_ptr = rotate_buffer+((i-1)*3);
          for ( unsigned int j = new_height; j > 0; j-- )
          {
            *(d_ptr+2) = *(--s_ptr);
            *(d_ptr+1) = *(--s_ptr);
            *d_ptr = *(--s_ptr);
            d_ptr += line_bytes;
          }
        }
      }
      break;
    }
  }
 
  AssignDirect( new_width, new_height, colours, subpixelorder, rotate_buffer, size, ZM_BUFTYPE_ZM);
  
}

/* RGB32 compatible: complete */
void Image::Flip( bool leftright )
{
  uint8_t* flip_buffer = AllocBuffer(size);
  
  unsigned int line_bytes = width*colours;
  unsigned int line_bytes2 = 2*line_bytes;
  if ( leftright )
  {
    // Horizontal flip, left to right
    unsigned char *s_ptr = buffer+line_bytes;
    unsigned char *d_ptr = flip_buffer;
    unsigned char *max_d_ptr = flip_buffer + size;

    if ( colours == ZM_COLOUR_GRAY8 )
    {
      while( d_ptr < max_d_ptr )
      {
        for ( unsigned int j = 0; j < width; j++ )
        {
          s_ptr--;
          *d_ptr++ = *s_ptr;
        }
        s_ptr += line_bytes2;
      }
    }
    else if ( colours == ZM_COLOUR_RGB32 )
    {
      Rgb* s_rptr = (Rgb*)s_ptr;
      Rgb* d_rptr = (Rgb*)flip_buffer;
      Rgb* max_d_rptr = (Rgb*)max_d_ptr;
      while( d_rptr < max_d_rptr )
      {
        for ( unsigned int j = 0; j < width; j++ )
        {
          s_rptr--;
          *d_rptr++ = *s_rptr;
        }
        s_rptr += width * 2;
      }
    }
    else /* Assume RGB24 */
    {
      while( d_ptr < max_d_ptr )
      {
        for ( unsigned int j = 0; j < width; j++ )
        {
          s_ptr -= 3;
          *d_ptr++ = *s_ptr;
          *d_ptr++ = *(s_ptr+1);
          *d_ptr++ = *(s_ptr+2);
        }
        s_ptr += line_bytes2;
      }
    }    
  }
  else
  {
    // Vertical flip, top to bottom
    unsigned char *s_ptr = buffer+(height*line_bytes);
    unsigned char *d_ptr = flip_buffer;

    while( s_ptr > buffer )
    {
      s_ptr -= line_bytes;
      memcpy( d_ptr, s_ptr, line_bytes );
      d_ptr += line_bytes;
    }
  }
  
  AssignDirect( width, height, colours, subpixelorder, flip_buffer, size, ZM_BUFTYPE_ZM);
  
}

void Image::Scale( unsigned int factor )
{
  if ( !factor )
  {
    Error( "Bogus scale factor %d found", factor );
    return;
  }
  if ( factor == ZM_SCALE_BASE )
  {
    return;
  }

  unsigned int new_width = (width*factor)/ZM_SCALE_BASE;
  unsigned int new_height = (height*factor)/ZM_SCALE_BASE;
  
  size_t scale_buffer_size = (new_width+1) * (new_height+1) * colours;
  
  uint8_t* scale_buffer = AllocBuffer(scale_buffer_size);
  
  if ( factor > ZM_SCALE_BASE )
  {
    unsigned char *pd = scale_buffer;
    unsigned int wc = width*colours;
    unsigned int nwc = new_width*colours;
    unsigned int h_count = ZM_SCALE_BASE/2;
    unsigned int last_h_index = 0;
    unsigned int last_w_index = 0;
    unsigned int h_index;
    for ( unsigned int y = 0; y < height; y++ )
    {
      unsigned char *ps = &buffer[y*wc];
      unsigned int w_count = ZM_SCALE_BASE/2;
      unsigned int w_index;
      last_w_index = 0;
      for ( unsigned int x = 0; x < width; x++ )
      {
        w_count += factor;
        w_index = w_count/ZM_SCALE_BASE;
        for (unsigned int f = last_w_index; f < w_index; f++ )
        {
          for ( unsigned int c = 0; c < colours; c++ )
          {
            *pd++ = *(ps+c);
          }
        }
        ps += colours;
        last_w_index = w_index;
      }
      h_count += factor;
      h_index = h_count/ZM_SCALE_BASE;
      for ( unsigned int f = last_h_index+1; f < h_index; f++ )
      {
        memcpy( pd, pd-nwc, nwc );
        pd += nwc;
      }
      last_h_index = h_index;
    }
    new_width = last_w_index;
    new_height = last_h_index;
  }
  else
  {
    unsigned char *pd = scale_buffer;
    unsigned int wc = width*colours;
    unsigned int xstart = factor/2;
    unsigned int ystart = factor/2;
    unsigned int h_count = ystart;
    unsigned int last_h_index = 0;
    unsigned int last_w_index = 0;
    unsigned int h_index;
    for ( unsigned int y = 0; y < (unsigned int)height; y++ )
    {
      h_count += factor;
      h_index = h_count/ZM_SCALE_BASE;
      if ( h_index > last_h_index )
      {
        unsigned int w_count = xstart;
        unsigned int w_index;
        last_w_index = 0;

        unsigned char *ps = &buffer[y*wc];
        for ( unsigned int x = 0; x < (unsigned int)width; x++ )
        {
          w_count += factor;
          w_index = w_count/ZM_SCALE_BASE;
          
          if ( w_index > last_w_index )
          {
            for ( unsigned int c = 0; c < colours; c++ )
            {
              *pd++ = *ps++;
            }
          }
          else
          {
            ps += colours;
          }
          last_w_index = w_index;
        }
      }
      last_h_index = h_index;
    }
    new_width = last_w_index;
    new_height = last_h_index;
  }
  
  AssignDirect( new_width, new_height, colours, subpixelorder, scale_buffer, scale_buffer_size, ZM_BUFTYPE_ZM);
  
}

void Image::Deinterlace_Discard()
{
  /* Simple deinterlacing. Copy the even lines into the odd lines */
  
  if ( colours == ZM_COLOUR_GRAY8 )
  {
    const uint8_t *psrc;
    uint8_t *pdest;
    for (unsigned int y = 0; y < (unsigned int)height; y += 2)
    {
      psrc = buffer + (y * width);
      pdest = buffer + ((y+1) * width);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pdest++ = *psrc++;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB24 )
  {
    const uint8_t *psrc;
    uint8_t *pdest;
    for (unsigned int y = 0; y < (unsigned int)height; y += 2)
    {
      psrc = buffer + ((y * width) * 3);
      pdest = buffer + (((y+1) * width) * 3);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pdest++ = *psrc++;
        *pdest++ = *psrc++;
        *pdest++ = *psrc++;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB32 )
  {
    const Rgb *psrc;
    Rgb *pdest;
    for (unsigned int y = 0; y < (unsigned int)height; y += 2)
    {
      psrc = (Rgb*)(buffer + ((y * width) << 2));
      pdest = (Rgb*)(buffer + (((y+1) * width) << 2));
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pdest++ = *psrc++;
      }
    }
  } else {
    Error("Deinterlace called with unexpected colours: %d", colours);
  }
  
}

void Image::Deinterlace_Linear()
{
  /* Simple deinterlacing. The odd lines are average of the line above and line below */
  
  const uint8_t *pbelow, *pabove;
  uint8_t *pcurrent;
  
  if ( colours == ZM_COLOUR_GRAY8 )
  {
    for (unsigned int y = 1; y < (unsigned int)(height-1); y += 2)
    {
      pabove = buffer + ((y-1) * width);
      pbelow = buffer + ((y+1) * width);
      pcurrent = buffer + (y * width);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pcurrent++ = (*pabove++ + *pbelow++) >> 1;
      }
    }
    /* Special case for the last line */
    pcurrent = buffer + ((height-1) * width);
    pabove = buffer + ((height-2) * width);
    for (unsigned int x = 0; x < (unsigned int)width; x++) {
      *pcurrent++ = *pabove++;
    }
  }
  else if ( colours == ZM_COLOUR_RGB24 )
  {
    for (unsigned int y = 1; y < (unsigned int)(height-1); y += 2)
    {
      pabove = buffer + (((y-1) * width) * 3);
      pbelow = buffer + (((y+1) * width) * 3);
      pcurrent = buffer + ((y * width) * 3);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pcurrent++ = (*pabove++ + *pbelow++) >> 1;
        *pcurrent++ = (*pabove++ + *pbelow++) >> 1;
        *pcurrent++ = (*pabove++ + *pbelow++) >> 1;
      }
    }
    /* Special case for the last line */
    pcurrent = buffer + (((height-1) * width) * 3);
    pabove = buffer + (((height-2) * width) * 3);
    for (unsigned int x = 0; x < (unsigned int)width; x++) {
      *pcurrent++ = *pabove++;
      *pcurrent++ = *pabove++;
      *pcurrent++ = *pabove++;
    }
  }
  else if ( colours == ZM_COLOUR_RGB32 )
  {
    for (unsigned int y = 1; y < (unsigned int)(height-1); y += 2)
    {
      pabove = buffer + (((y-1) * width) << 2);
      pbelow = buffer + (((y+1) * width) << 2);
      pcurrent = buffer + ((y * width) << 2);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pcurrent++ = (*pabove++ + *pbelow++) >> 1;
        *pcurrent++ = (*pabove++ + *pbelow++) >> 1;
        *pcurrent++ = (*pabove++ + *pbelow++) >> 1;
        *pcurrent++ = (*pabove++ + *pbelow++) >> 1;
      }
    }
    /* Special case for the last line */
    pcurrent = buffer + (((height-1) * width) << 2);
    pabove = buffer + (((height-2) * width) << 2);
    for (unsigned int x = 0; x < (unsigned int)width; x++) {
      *pcurrent++ = *pabove++;
      *pcurrent++ = *pabove++;
      *pcurrent++ = *pabove++;  
      *pcurrent++ = *pabove++;
    }
  } else {
    Error("Deinterlace called with unexpected colours: %d", colours);
  }
  
}

void Image::Deinterlace_Blend()
{
  /* Simple deinterlacing. Blend the fields together. 50% blend */
  
  uint8_t *pabove, *pcurrent;
  
  if ( colours == ZM_COLOUR_GRAY8 )
  {
    for (unsigned int y = 1; y < (unsigned int)height; y += 2)
    {
      pabove = buffer + ((y-1) * width);
      pcurrent = buffer + (y * width);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pabove = (*pabove + *pcurrent) >> 1;
        *pcurrent++ = *pabove++;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB24 )
  {
    for (unsigned int y = 1; y < (unsigned int)height; y += 2)
    {
      pabove = buffer + (((y-1) * width) * 3);
      pcurrent = buffer + ((y * width) * 3);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pabove = (*pabove + *pcurrent) >> 1;
        *pcurrent++ = *pabove++;
        *pabove = (*pabove + *pcurrent) >> 1;
        *pcurrent++ = *pabove++;
        *pabove = (*pabove + *pcurrent) >> 1;
        *pcurrent++ = *pabove++;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB32 )
  {
    for (unsigned int y = 1; y < (unsigned int)height; y += 2)
    {
      pabove = buffer + (((y-1) * width) << 2);
      pcurrent = buffer + ((y * width) << 2);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        *pabove = (*pabove + *pcurrent) >> 1;
        *pcurrent++ = *pabove++;
        *pabove = (*pabove + *pcurrent) >> 1;
        *pcurrent++ = *pabove++;
        *pabove = (*pabove + *pcurrent) >> 1;
        *pcurrent++ = *pabove++;
        *pabove = (*pabove + *pcurrent) >> 1;
        *pcurrent++ = *pabove++;
      }
    }
  } else {
    Error("Deinterlace called with unexpected colours: %d", colours);
  }
  
}

void Image::Deinterlace_Blend_CustomRatio(int divider)
{
  /* Simple deinterlacing. Blend the fields together at a custom ratio. */
  /* 1 = 50% blending   */
  /* 2 = 25% blending   */
  /* 3 = 12.% blending  */
  /* 4 = 6.25% blending */
  
  uint8_t *pabove, *pcurrent;
  uint8_t subpix1, subpix2;
  
  if ( divider < 1 || divider > 4 ) {
    Error("Deinterlace called with invalid blend ratio");
  }
  
  if ( colours == ZM_COLOUR_GRAY8 )
  {
    for (unsigned int y = 1; y < (unsigned int)height; y += 2)
    {
      pabove = buffer + ((y-1) * width);
      pcurrent = buffer + (y * width);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        subpix1 = ((*pabove - *pcurrent)>>divider) + *pcurrent;
        subpix2 = ((*pcurrent - *pabove)>>divider) + *pabove;
        *pcurrent++ = subpix1;
        *pabove++ = subpix2;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB24 )
  {
    for (unsigned int y = 1; y < (unsigned int)height; y += 2)
    {
      pabove = buffer + (((y-1) * width) * 3);
      pcurrent = buffer + ((y * width) * 3);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        subpix1 = ((*pabove - *pcurrent)>>divider) + *pcurrent;
        subpix2 = ((*pcurrent - *pabove)>>divider) + *pabove;
        *pcurrent++ = subpix1;
        *pabove++ = subpix2;
        subpix1 = ((*pabove - *pcurrent)>>divider) + *pcurrent;
        subpix2 = ((*pcurrent - *pabove)>>divider) + *pabove;
        *pcurrent++ = subpix1;
        *pabove++ = subpix2;
        subpix1 = ((*pabove - *pcurrent)>>divider) + *pcurrent;
        subpix2 = ((*pcurrent - *pabove)>>divider) + *pabove;
        *pcurrent++ = subpix1;
        *pabove++ = subpix2;
      }
    }
  }
  else if ( colours == ZM_COLOUR_RGB32 )
  {
    for (unsigned int y = 1; y < (unsigned int)height; y += 2)
    {
      pabove = buffer + (((y-1) * width) << 2);
      pcurrent = buffer + ((y * width) << 2);
      for (unsigned int x = 0; x < (unsigned int)width; x++) {
        subpix1 = ((*pabove - *pcurrent)>>divider) + *pcurrent;
        subpix2 = ((*pcurrent - *pabove)>>divider) + *pabove;
        *pcurrent++ = subpix1;
        *pabove++ = subpix2;
        subpix1 = ((*pabove - *pcurrent)>>divider) + *pcurrent;
        subpix2 = ((*pcurrent - *pabove)>>divider) + *pabove;
        *pcurrent++ = subpix1;
        *pabove++ = subpix2;
        subpix1 = ((*pabove - *pcurrent)>>divider) + *pcurrent;
        subpix2 = ((*pcurrent - *pabove)>>divider) + *pabove;
        *pcurrent++ = subpix1;
        *pabove++ = subpix2;
        subpix1 = ((*pabove - *pcurrent)>>divider) + *pcurrent;
        subpix2 = ((*pcurrent - *pabove)>>divider) + *pabove;
        *pcurrent++ = subpix1;
        *pabove++ = subpix2;
      }
    }
  } else {
    Error("Deinterlace called with unexpected colours: %d", colours);
  }
  
}


void Image::Deinterlace_4Field(const Image* next_image, unsigned int threshold)
{
  if ( !(width == next_image->width && height == next_image->height && colours == next_image->colours && subpixelorder == next_image->subpixelorder) )
  {
    Panic( "Attempt to deinterlace different sized images, expected %dx%dx%d %d, got %dx%dx%d %d", width, height, colours, subpixelorder, next_image->width, next_image->height, next_image->colours, next_image->subpixelorder);
  }
  
  switch(colours) {
    case ZM_COLOUR_RGB24:
    {
    if(subpixelorder == ZM_SUBPIX_ORDER_BGR) {
      /* BGR subpixel order */
      std_deinterlace_4field_bgr(buffer, next_image->buffer, threshold, width, height);
    } else {
      /* Assume RGB subpixel order */
      std_deinterlace_4field_rgb(buffer, next_image->buffer, threshold, width, height);
    }
    break;
    }
    case ZM_COLOUR_RGB32:
    {
    if(subpixelorder == ZM_SUBPIX_ORDER_ARGB) {
      /* ARGB subpixel order */
      (*fptr_deinterlace_4field_argb)(buffer, next_image->buffer, threshold, width, height);
    } else if(subpixelorder == ZM_SUBPIX_ORDER_ABGR) {
      /* ABGR subpixel order */
      (*fptr_deinterlace_4field_abgr)(buffer, next_image->buffer, threshold, width, height);
    } else if(subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
      /* BGRA subpixel order */
      (*fptr_deinterlace_4field_bgra)(buffer, next_image->buffer, threshold, width, height);
    } else {
      /* Assume RGBA subpixel order */
      (*fptr_deinterlace_4field_rgba)(buffer, next_image->buffer, threshold, width, height);
    }
    break;
    }
    case ZM_COLOUR_GRAY8:
    (*fptr_deinterlace_4field_gray8)(buffer, next_image->buffer, threshold, width, height);
    break;
    default:
    Panic("Deinterlace_4Field called with unexpected colours: %d",colours);
    break;
  }
  
}


/************************************************* BLEND FUNCTIONS *************************************************/


#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("sse2")))
#endif
void sse2_fastblend(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count, double blendpercent) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  static uint32_t divider = 0;
  static uint32_t clearmask = 0;
  static double current_blendpercent = 0.0;
  
  if(current_blendpercent != blendpercent) {
    /* Attempt to match the blending percent to one of the possible values */
    if(blendpercent < 2.34375) {
      // 1.5625% blending
      divider = 6;
      clearmask = 0x03030303;
    } else if(blendpercent < 4.6875) {
      // 3.125% blending
      divider = 5;
      clearmask = 0x07070707;
    } else if(blendpercent < 9.375) {
      // 6.25% blending
      divider = 4;
      clearmask = 0x0F0F0F0F;
    } else if(blendpercent < 18.75) {
      // 12.5% blending
      divider = 3;
      clearmask = 0x1F1F1F1F;
    } else if(blendpercent < 37.5) {
      // 25% blending
      divider = 2;
      clearmask = 0x3F3F3F3F;
    } else {
      // 50% blending
      divider = 1;
      clearmask = 0x7F7F7F7F;
    }
    current_blendpercent = blendpercent;
  }

  __asm__ __volatile__(
  "movd %4, %%xmm3\n\t"
  "movd %5, %%xmm4\n\t"
  "pshufd $0x0, %%xmm3, %%xmm3\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x10, %2\n\t"
  "sse2_fastblend_iter:\n\t"
  "movdqa (%0,%3),%%xmm0\n\t"
  "movdqa %%xmm0,%%xmm2\n\t"
  "movdqa (%1,%3),%%xmm1\n\t"
  "psrlq  %%xmm4,%%xmm0\n\t"
  "psrlq  %%xmm4,%%xmm1\n\t"
  "pand   %%xmm3,%%xmm1\n\t"
  "pand   %%xmm3,%%xmm0\n\t"
  "psubb  %%xmm0,%%xmm1\n\t"
  "paddb  %%xmm2,%%xmm1\n\t"
  "movntdq %%xmm1,(%2,%3)\n\t"
  "sub $0x10, %3\n\t"
  "jnz sse2_fastblend_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count), "m" (clearmask), "m" (divider)
  : "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

__attribute__((noinline)) void std_fastblend(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count, double blendpercent) {
  static int divider = 0;
  static double current_blendpercent = 0.0;
  const uint8_t* const max_ptr = result + count;
  
  if(current_blendpercent != blendpercent) {
    /* Attempt to match the blending percent to one of the possible values */
    if(blendpercent < 2.34375) {
      // 1.5625% blending
      divider = 6;
    } else if(blendpercent < 4.6875) {
      // 3.125% blending
      divider = 5;
    } else if(blendpercent < 9.375) {
      // 6.25% blending
      divider = 4;
    } else if(blendpercent < 18.75) {
      // 12.5% blending
      divider = 3;
    } else if(blendpercent < 37.5) {
      // 25% blending
      divider = 2;
    } else {
      // 50% blending
      divider = 1;
    }
    current_blendpercent = blendpercent;
  }
  

  while(result < max_ptr) {
    result[0] = ((col2[0] - col1[0])>>divider) + col1[0];
    result[1] = ((col2[1] - col1[1])>>divider) + col1[1];
    result[2] = ((col2[2] - col1[2])>>divider) + col1[2];
    result[3] = ((col2[3] - col1[3])>>divider) + col1[3];
    result[4] = ((col2[4] - col1[4])>>divider) + col1[4];
    result[5] = ((col2[5] - col1[5])>>divider) + col1[5];
    result[6] = ((col2[6] - col1[6])>>divider) + col1[6];
    result[7] = ((col2[7] - col1[7])>>divider) + col1[7];
    result[8] = ((col2[8] - col1[8])>>divider) + col1[8];
    result[9] = ((col2[9] - col1[9])>>divider) + col1[9];
    result[10] = ((col2[10] - col1[10])>>divider) + col1[10];
    result[11] = ((col2[11] - col1[11])>>divider) + col1[11];
    result[12] = ((col2[12] - col1[12])>>divider) + col1[12];
    result[13] = ((col2[13] - col1[13])>>divider) + col1[13];
    result[14] = ((col2[14] - col1[14])>>divider) + col1[14];
    result[15] = ((col2[15] - col1[15])>>divider) + col1[15];
    
    col1 += 16;
    col2 += 16;
    result += 16;
  }
}

__attribute__((noinline)) void std_blend(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count, double blendpercent) {
  double divide = blendpercent / 100.0;
  double opacity = 1.0 - divide;
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    *result++ = (*col1++ * opacity) + (*col2++ * divide);
    
  } 
}

/************************************************* DELTA FUNCTIONS *************************************************/

/* Grayscale */
__attribute__((noinline)) void std_delta8_gray8(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
  /* Loop unrolling is used to work on 16 bytes (16 grayscale pixels) at a time */  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    result[0] = abs(col1[0] - col2[0]);
    result[1] = abs(col1[1] - col2[1]);
    result[2] = abs(col1[2] - col2[2]);
    result[3] = abs(col1[3] - col2[3]);
    result[4] = abs(col1[4] - col2[4]);
    result[5] = abs(col1[5] - col2[5]);
    result[6] = abs(col1[6] - col2[6]);
    result[7] = abs(col1[7] - col2[7]);
    result[8] = abs(col1[8] - col2[8]);
    result[9] = abs(col1[9] - col2[9]);
    result[10] = abs(col1[10] - col2[10]);
    result[11] = abs(col1[11] - col2[11]);
    result[12] = abs(col1[12] - col2[12]);
    result[13] = abs(col1[13] - col2[13]);
    result[14] = abs(col1[14] - col2[14]);
    result[15] = abs(col1[15] - col2[15]);
    
    col1 += 16;
    col2 += 16;
    result += 16;
  }  
}

/* RGB24: RGB */
__attribute__((noinline)) void std_delta8_rgb(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
  /* Loop unrolling is used to work on 12 bytes (4 rgb24 pixels) at a time */
  int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    r = abs(col1[0] - col2[0]);
    g = abs(col1[1] - col2[1]);
    b = abs(col1[2] - col2[2]);
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[3] - col2[3]);
    g = abs(col1[4] - col2[4]);
    b = abs(col1[5] - col2[5]);
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[6] - col2[6]);
    g = abs(col1[7] - col2[7]);
    b = abs(col1[8] - col2[8]);
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[9] - col2[9]);
    g = abs(col1[10] - col2[10]);
    b = abs(col1[11] - col2[11]);
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 12;
    col2 += 12;
    result += 4;
  }
}

/* RGB24: BGR */
__attribute__((noinline)) void std_delta8_bgr(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
  /* Loop unrolling is used to work on 12 bytes (4 rgb24 pixels) at a time */
  int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    b = abs(col1[0] - col2[0]);
    g = abs(col1[1] - col2[1]);
    r = abs(col1[2] - col2[2]);
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[3] - col2[3]);
    g = abs(col1[4] - col2[4]);
    r = abs(col1[5] - col2[5]);
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[6] - col2[6]);
    g = abs(col1[7] - col2[7]);
    r = abs(col1[8] - col2[8]);
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[9] - col2[9]);
    g = abs(col1[10] - col2[10]);
    r = abs(col1[11] - col2[11]);
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 12;
    col2 += 12;
    result += 4;
  }
}

/* RGB32: RGBA */
__attribute__((noinline)) void std_delta8_rgba(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
  /* Loop unrolling is used to work on 16 bytes (4 rgb32 pixels) at a time */
  int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    r = abs(col1[0] - col2[0]);
    g = abs(col1[1] - col2[1]);
    b = abs(col1[2] - col2[2]);
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[4] - col2[4]);
    g = abs(col1[5] - col2[5]);
    b = abs(col1[6] - col2[6]);
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[8] - col2[8]);
    g = abs(col1[9] - col2[9]);
    b = abs(col1[10] - col2[10]);
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[12] - col2[12]);
    g = abs(col1[13] - col2[13]);
    b = abs(col1[14] - col2[14]);
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 16;
    col2 += 16;
    result += 4;
  }
}

/* RGB32: BGRA */
__attribute__((noinline)) void std_delta8_bgra(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
  /* Loop unrolling is used to work on 16 bytes (4 rgb32 pixels) at a time */
  int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    b = abs(col1[0] - col2[0]);
    g = abs(col1[1] - col2[1]);
    r = abs(col1[2] - col2[2]);
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[4] - col2[4]);
    g = abs(col1[5] - col2[5]);
    r = abs(col1[6] - col2[6]);
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[8] - col2[8]);
    g = abs(col1[9] - col2[9]);
    r = abs(col1[10] - col2[10]);
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[12] - col2[12]);
    g = abs(col1[13] - col2[13]);
    r = abs(col1[14] - col2[14]);
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 16;
    col2 += 16;
    result += 4;
  }
}

/* RGB32: ARGB */
__attribute__((noinline)) void std_delta8_argb(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
  /* Loop unrolling is used to work on 16 bytes (4 rgb32 pixels) at a time */
  int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    r = abs(col1[1] - col2[1]);
    g = abs(col1[2] - col2[2]);
    b = abs(col1[3] - col2[3]);
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[5] - col2[5]);
    g = abs(col1[6] - col2[6]);
    b = abs(col1[7] - col2[7]);
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[9] - col2[9]);
    g = abs(col1[10] - col2[10]);
    b = abs(col1[11] - col2[11]);
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    r = abs(col1[13] - col2[13]);
    g = abs(col1[14] - col2[14]);
    b = abs(col1[15] - col2[15]);
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 16;
    col2 += 16;
    result += 4;
  }
}

/* RGB32: ABGR */
__attribute__((noinline)) void std_delta8_abgr(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
  /* Loop unrolling is used to work on 16 bytes (4 rgb32 pixels) at a time */
  int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    b = abs(col1[1] - col2[1]);
    g = abs(col1[2] - col2[2]);
    r = abs(col1[3] - col2[3]);
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[5] - col2[5]);
    g = abs(col1[6] - col2[6]);
    r = abs(col1[7] - col2[7]);
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[9] - col2[9]);
    g = abs(col1[10] - col2[10]);
    r = abs(col1[11] - col2[11]);
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    b = abs(col1[13] - col2[13]);
    g = abs(col1[14] - col2[14]);
    r = abs(col1[15] - col2[15]);
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 16;
    col2 += 16;
    result += 4;
  }
}

/* Grayscale SSE2 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("sse2")))
#endif
void sse2_delta8_gray8(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  

  __asm__ __volatile__ (
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x10, %2\n\t"
  "sse2_delta8_gray8_iter:\n\t"
  "movdqa (%0,%3), %%xmm1\n\t"
  "movdqa (%1,%3), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm3\n\t"
  "movdqa %%xmm2, %%xmm4\n\t"
  "pmaxub %%xmm1, %%xmm2\n\t"
  "pminub %%xmm3, %%xmm4\n\t"
  "psubb  %%xmm4, %%xmm2\n\t"
  "movntdq %%xmm2, (%2,%3)\n\t"
  "sub $0x10, %3\n\t"
  "jnz sse2_delta8_gray8_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count)
  : "%xmm1", "%xmm2", "%xmm3", "%xmm4", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGB32: RGBA SSE2 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("sse2")))
#endif
void sse2_delta8_rgba(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  
  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x4, %2\n\t"
  "sse2_delta8_rgba_iter:\n\t"
  "movdqa (%0,%3,4), %%xmm1\n\t"
  "movdqa (%1,%3,4), %%xmm2\n\t"
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t"
  "movdqa %%xmm2, %%xmm6\n\t"
  "pmaxub %%xmm1, %%xmm2\n\t"
  "pminub %%xmm5, %%xmm6\n\t"
  "psubb %%xmm6, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm3\n\t"
  "psrld $0x8, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm1, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "packssdw %%xmm1, %%xmm1\n\t"
  "packuswb %%xmm1, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%2,%3)\n\t"
  "sub $0x4, %3\n\t"
  "jnz sse2_delta8_rgba_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGB32: BGRA SSE2 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("sse2")))
#endif
void sse2_delta8_bgra(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  
  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x4, %2\n\t"
  "sse2_delta8_bgra_iter:\n\t"
  "movdqa (%0,%3,4), %%xmm1\n\t"
  "movdqa (%1,%3,4), %%xmm2\n\t"
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t"
  "movdqa %%xmm2, %%xmm6\n\t"
  "pmaxub %%xmm1, %%xmm2\n\t"
  "pminub %%xmm5, %%xmm6\n\t"
  "psubb %%xmm6, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm3\n\t"
  "psrld $0x8, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "packssdw %%xmm1, %%xmm1\n\t"
  "packuswb %%xmm1, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%2,%3)\n\t"
  "sub $0x4, %3\n\t"
  "jnz sse2_delta8_bgra_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGB32: ARGB SSE2 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("sse2")))
#endif
void sse2_delta8_argb(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  
  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x4, %2\n\t"
  "sse2_delta8_argb_iter:\n\t"
  "movdqa (%0,%3,4), %%xmm1\n\t"
  "movdqa (%1,%3,4), %%xmm2\n\t"
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t"
  "movdqa %%xmm2, %%xmm6\n\t"
  "pmaxub %%xmm1, %%xmm2\n\t"
  "pminub %%xmm5, %%xmm6\n\t"
  "psubb %%xmm6, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm3\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "psrld $0x8, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm1, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x18, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "packssdw %%xmm1, %%xmm1\n\t"
  "packuswb %%xmm1, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%2,%3)\n\t"
  "sub $0x4, %3\n\t"
  "jnz sse2_delta8_argb_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGB32: ABGR SSE2 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("sse2")))
#endif
void sse2_delta8_abgr(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  
  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x4, %2\n\t"
  "sse2_delta8_abgr_iter:\n\t"
  "movdqa (%0,%3,4), %%xmm1\n\t"
  "movdqa (%1,%3,4), %%xmm2\n\t"
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t"
  "movdqa %%xmm2, %%xmm6\n\t"
  "pmaxub %%xmm1, %%xmm2\n\t"
  "pminub %%xmm5, %%xmm6\n\t"
  "psubb %%xmm6, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm3\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "psrld $0x8, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x18, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "packssdw %%xmm1, %%xmm1\n\t"
  "packuswb %%xmm1, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%2,%3)\n\t"
  "sub $0x4, %3\n\t"
  "jnz sse2_delta8_abgr_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGB32: RGBA SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_delta8_rgba(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  
  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "movdqa %4, %%xmm5\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x4, %2\n\t"
  "ssse3_delta8_rgba_iter:\n\t"
  "movdqa (%0,%3,4), %%xmm1\n\t"
  "movdqa (%1,%3,4), %%xmm2\n\t"
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm3\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x8, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm1, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "pshufb %%xmm5, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%2,%3)\n\t"
  "sub $0x4, %3\n\t"
  "jnz ssse3_delta8_rgba_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count), "m" (*movemask)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGB32: BGRA SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_delta8_bgra(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  
  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "movdqa %4, %%xmm5\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x4, %2\n\t"
  "ssse3_delta8_bgra_iter:\n\t"
  "movdqa (%0,%3,4), %%xmm1\n\t"
  "movdqa (%1,%3,4), %%xmm2\n\t"
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm3\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x8, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "pshufb %%xmm5, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%2,%3)\n\t"
  "sub $0x4, %3\n\t"
  "jnz ssse3_delta8_bgra_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count), "m" (*movemask)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGB32: ARGB SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_delta8_argb(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  
  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "movdqa %4, %%xmm5\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x4, %2\n\t"
  "ssse3_delta8_argb_iter:\n\t"
  "movdqa (%0,%3,4), %%xmm1\n\t"
  "movdqa (%1,%3,4), %%xmm2\n\t"
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm3\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "psrld $0x8, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm1, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x18, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "pshufb %%xmm5, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%2,%3)\n\t"
  "sub $0x4, %3\n\t"
  "jnz ssse3_delta8_argb_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count), "m" (*movemask)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGB32: ABGR SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_delta8_abgr(const uint8_t* col1, const uint8_t* col2, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  
  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "movdqa %4, %%xmm5\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x10, %1\n\t"
  "sub $0x4, %2\n\t"
  "ssse3_delta8_abgr_iter:\n\t"
  "movdqa (%0,%3,4), %%xmm1\n\t"
  "movdqa (%1,%3,4), %%xmm2\n\t"
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm3\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "psrld $0x8, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x18, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "pshufb %%xmm5, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%2,%3)\n\t"
  "sub $0x4, %3\n\t"
  "jnz ssse3_delta8_abgr_iter\n\t"
  :
  : "r" (col1), "r" (col2), "r" (result), "r" (count), "m" (*movemask)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}


/************************************************* CONVERT FUNCTIONS *************************************************/

/* RGB24 to grayscale */
__attribute__((noinline)) void std_convert_rgb_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    r = col1[0];
    g = col1[1];
    b = col1[2];
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[3];
    g = col1[4];
    b = col1[5];
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[6];
    g = col1[7];
    b = col1[8];
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[9];
    g = col1[10];
    b = col1[11];
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 12;
    result += 4;
  }
}

/* BGR24 to grayscale */
__attribute__((noinline)) void std_convert_bgr_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    b = col1[0];
    g = col1[1];
    r = col1[2];
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[3];
    g = col1[4];
    r = col1[5];
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[6];
    g = col1[7];
    r = col1[8];
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[9];
    g = col1[10];
    r = col1[11];
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 12;
    result += 4;
  }
}

/* RGBA to grayscale */
__attribute__((noinline)) void std_convert_rgba_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    r = col1[0];
    g = col1[1];
    b = col1[2];
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[4];
    g = col1[5];
    b = col1[6];
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[8];
    g = col1[9];
    b = col1[10];
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[12];
    g = col1[13];
    b = col1[14];
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 16;
    result += 4;
  }
}

/* BGRA to grayscale */
__attribute__((noinline)) void std_convert_bgra_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    b = col1[0];
    g = col1[1];
    r = col1[2];
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[4];
    g = col1[5];
    r = col1[6];
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[8];
    g = col1[9];
    r = col1[10];
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[12];
    g = col1[13];
    r = col1[14];
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 16;
    result += 4;
  }
}

/* ARGB to grayscale */
__attribute__((noinline)) void std_convert_argb_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    r = col1[1];
    g = col1[2];
    b = col1[3];
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[5];
    g = col1[6];
    b = col1[7];
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[9];
    g = col1[10];
    b = col1[11];
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    r = col1[13];
    g = col1[14];
    b = col1[15];
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 16;
    result += 4;
  }
}

/* ABGR to grayscale */
__attribute__((noinline)) void std_convert_abgr_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    b = col1[1];
    g = col1[2];
    r = col1[3];
    result[0] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[5];
    g = col1[6];
    r = col1[7];
    result[1] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[9];
    g = col1[10];
    r = col1[11];
    result[2] = (r + r + b + g + g + g + g + g)>>3;
    b = col1[13];
    g = col1[14];
    r = col1[15];
    result[3] = (r + r + b + g + g + g + g + g)>>3;
    
    col1 += 16;
    result += 4;
  }
}

/* Converts a YUYV image into grayscale by extracting the Y channel */
__attribute__((noinline)) void std_convert_yuyv_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
  const uint16_t* yuvbuf = (const uint16_t*)col1;
  const uint8_t* const max_ptr = result + count;
  
  while(result < max_ptr) {
    result[0] = (uint8_t)yuvbuf[0];
    result[1] = (uint8_t)yuvbuf[1];
    result[2] = (uint8_t)yuvbuf[2];
    result[3] = (uint8_t)yuvbuf[3];
    result[4] = (uint8_t)yuvbuf[4];
    result[5] = (uint8_t)yuvbuf[5];
    result[6] = (uint8_t)yuvbuf[6];
    result[7] = (uint8_t)yuvbuf[7];
    result[8] = (uint8_t)yuvbuf[8];
    result[9] = (uint8_t)yuvbuf[9];
    result[10] = (uint8_t)yuvbuf[10];
    result[11] = (uint8_t)yuvbuf[11];
    result[12] = (uint8_t)yuvbuf[12];
    result[13] = (uint8_t)yuvbuf[13];
    result[14] = (uint8_t)yuvbuf[14];
    result[15] = (uint8_t)yuvbuf[15];
    
    yuvbuf += 16;
    result += 16;
  }
}

/* RGBA to grayscale SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_convert_rgba_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  

  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "mov $0xff, %%eax\n\t"
  "movd %%eax, %%xmm0\n\t"
  "pshufd $0x0, %%xmm0, %%xmm0\n\t"
  "movdqa %3, %%xmm5\n\t"
  "sub $0x10, %0\n\t"
  "sub $0x4, %1\n\t"
  "ssse3_convert_rgba_gray8_iter:\n\t"
  "movdqa (%0,%2,4), %%xmm3\n\t"
  "psrlq $0x3, %%xmm3\n\t"
  "pand %%xmm4, %%xmm3\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x8, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "pslld $0x2, %%xmm2\n\t"
  "paddd %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm3, %%xmm1\n\t"
  "pand %%xmm0, %%xmm1\n\t"
  "paddd %%xmm1, %%xmm1\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm3, %%xmm2\n\t"
  "psrld $0x10, %%xmm2\n\t"
  "pand %%xmm0, %%xmm2\n\t"
  "paddd %%xmm2, %%xmm1\n\t"
  "pshufb %%xmm5, %%xmm1\n\t"
  "movd %%xmm1, %%eax\n\t"
  "movnti %%eax, (%1,%2)\n\t"
  "sub $0x4, %2\n\t"
  "jnz ssse3_convert_rgba_gray8_iter\n\t"
  :
  : "r" (col1), "r" (result), "r" (count), "m" (*movemask)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* Converts a YUYV image into grayscale by extracting the Y channel */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_convert_yuyv_gray8(const uint8_t* col1, uint8_t* result, unsigned long count) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))  
  unsigned long i = 0;
  
  __attribute__((aligned(16))) static const uint8_t movemask1[16] = {0,2,4,6,8,10,12,14,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
  __attribute__((aligned(16))) static const uint8_t movemask2[16] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0,2,4,6,8,10,12,14};
  
  /* XMM0 - General purpose */
  /* XMM1 - General purpose */
  /* XMM2 - unused */
  /* XMM3 - shift mask 1 */
  /* XMM4 - shift mask 2 */
  /* XMM5 - unused*/
  /* XMM6 - unused */
  /* XMM7 - unused */

  __asm__ __volatile__ (
  "movdqa %4, %%xmm3\n\t"
  "movdqa %5, %%xmm4\n\t"
  "algo_ssse3_convert_yuyv_gray8:\n\t"
  "movdqa (%0), %%xmm0\n\t"
  "pshufb %%xmm3, %%xmm0\n\t"
  "movdqa 0x10(%0), %%xmm1\n\t"
  "pshufb %%xmm4, %%xmm1\n\t"
  "por %%xmm1, %%xmm0\n\t"
  "movntdq %%xmm0, (%1)\n\t"
  "add $0x10, %3\n\t"
  "add $0x10, %1\n\t"
  "add $0x20, %0\n\t"
  "cmp %2, %3\n\t"
  "jb algo_ssse3_convert_yuyv_gray8\n\t"
  :
#if (defined(_DEBUG) && !defined(__x86_64__)) /* Use one less register to allow compilation to success on 32bit with omit frame pointer disabled */
  : "r" (col1), "r" (result), "m" (count), "r" (i), "m" (*movemask1), "m" (*movemask2)
#else
  : "r" (col1), "r" (result), "r" (count), "r" (i), "m" (*movemask1), "m" (*movemask2)
#endif
  : "%xmm3", "%xmm4", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* YUYV to RGB24 - relocated from zm_local_camera.cpp */
__attribute__((noinline)) void zm_convert_yuyv_rgb(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;
  unsigned int y1,y2,u,v;
  for(unsigned int i=0; i < count; i += 2, col1 += 4, result += 6) {
    y1 = col1[0];
    u = col1[1];
    y2 = col1[2];
    v = col1[3];

    r = y1 + r_v_table[v];
    g = y1 - (g_u_table[u]+g_v_table[v]);
    b = y1 + b_u_table[u];
    
    result[0] = r<0?0:(r>255?255:r);
    result[1] = g<0?0:(g>255?255:g);
    result[2] = b<0?0:(b>255?255:b);
    
    r = y2 + r_v_table[v];
    g = y2 - (g_u_table[u]+g_v_table[v]);
    b = y2 + b_u_table[u];

    result[3] = r<0?0:(r>255?255:r);
    result[4] = g<0?0:(g>255?255:g);
    result[5] = b<0?0:(b>255?255:b);
  }
  
}

/* YUYV to RGBA - modified the one above */
__attribute__((noinline)) void zm_convert_yuyv_rgba(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;
  unsigned int y1,y2,u,v;
  for(unsigned int i=0; i < count; i += 2, col1 += 4, result += 8) {
    y1 = col1[0];
    u = col1[1];
    y2 = col1[2];
    v = col1[3];

    r = y1 + r_v_table[v];
    g = y1 - (g_u_table[u]+g_v_table[v]);
    b = y1 + b_u_table[u];
    
    result[0] = r<0?0:(r>255?255:r);
    result[1] = g<0?0:(g>255?255:g);
    result[2] = b<0?0:(b>255?255:b);
    
    r = y2 + r_v_table[v];
    g = y2 - (g_u_table[u]+g_v_table[v]);
    b = y2 + b_u_table[u];

    result[4] = r<0?0:(r>255?255:r);
    result[5] = g<0?0:(g>255?255:g);
    result[6] = b<0?0:(b>255?255:b);
  }
  
}

/* RGB555 to RGB24 - relocated from zm_local_camera.cpp */
__attribute__((noinline)) void zm_convert_rgb555_rgb(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  for(unsigned int i=0; i < count; i++, col1 += 2, result += 3) {  
    b = ((*col1)<<3)&0xf8;
    g = (((*(col1+1))<<6)|((*col1)>>2))&0xf8;
    r = ((*(col1+1))<<1)&0xf8;
    result[0] = r;
    result[1] = g;
    result[2] = b;
  }
}

/* RGB555 to RGBA - modified the one above */
__attribute__((noinline)) void zm_convert_rgb555_rgba(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  for(unsigned int i=0; i < count; i++, col1 += 2, result += 4) {  
    b = ((*col1)<<3)&0xf8;
    g = (((*(col1+1))<<6)|((*col1)>>2))&0xf8;
    r = ((*(col1+1))<<1)&0xf8;
    result[0] = r;
    result[1] = g;
    result[2] = b;
  }
}

/* RGB565 to RGB24 - relocated from zm_local_camera.cpp */
__attribute__((noinline)) void zm_convert_rgb565_rgb(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  for(unsigned int i=0; i < count; i++, col1 += 2, result += 3) {  
    b = ((*col1)<<3)&0xf8;
    g = (((*(col1+1))<<5)|((*col1)>>3))&0xfc;
    r = (*(col1+1))&0xf8;
    result[0] = r;
    result[1] = g;
    result[2] = b;
  }
}

/* RGB565 to RGBA - modified the one above */
__attribute__((noinline)) void zm_convert_rgb565_rgba(const uint8_t* col1, uint8_t* result, unsigned long count) {
  unsigned int r,g,b;  
  for(unsigned int i=0; i < count; i++, col1 += 2, result += 4) {  
    b = ((*col1)<<3)&0xf8;
    g = (((*(col1+1))<<5)|((*col1)>>3))&0xfc;
    r = (*(col1+1))&0xf8;
    result[0] = r;
    result[1] = g;
    result[2] = b;
  }
}

/************************************************* DEINTERLACE FUNCTIONS *************************************************/

/* Grayscale */
__attribute__((noinline)) void std_deinterlace_4field_gray8(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height)
{
  uint8_t *pcurrent, *pabove, *pncurrent, *pnabove, *pbelow;
  const uint8_t* const max_ptr = col1 + (width*(height-1));
  const uint8_t *max_ptr2;

  pcurrent = col1 + width;
  pncurrent = col2 + width;
  pabove = col1;
  pnabove = col2;
  pbelow = col1 + (width*2);
  while(pcurrent < max_ptr)
  {
    max_ptr2 = pcurrent + width;
    while(pcurrent < max_ptr2) {
      if((unsigned int)((abs(*pnabove - *pabove) + abs(*pncurrent - *pcurrent)) >> 1) >= threshold) {
        *pcurrent = (*pabove + *pbelow) >> 1;
      }
      pabove++;
      pnabove++;
      pcurrent++;
      pncurrent++;
      pbelow++;
    }
    pcurrent += width;
    pncurrent += width;
    pabove += width;
    pnabove += width;
    pbelow += width;
    
  }
  
  /* Special case for the last line */
  max_ptr2 = pcurrent + width;
  while(pcurrent < max_ptr2) {
    if((unsigned int)((abs(*pnabove - *pabove) + abs(*pncurrent - *pcurrent)) >> 1) >= threshold) {
      *pcurrent = *pabove;
    }
    pabove++;
    pnabove++;
    pcurrent++;
    pncurrent++;
  }
}

/* RGB */
__attribute__((noinline)) void std_deinterlace_4field_rgb(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height)
{
  uint8_t *pcurrent, *pabove, *pncurrent, *pnabove, *pbelow;
  const unsigned int row_width = width*3;
  const uint8_t* const max_ptr = col1 + (row_width * (height-1));
  const uint8_t *max_ptr2;
  unsigned int b, g, r;
  unsigned int delta1, delta2;

  pcurrent = col1 + (width*3);
  pncurrent = col2 + (width*3);
  pabove = col1;
  pnabove = col2;
  pbelow = col1 + ((width*2)*3);
  while(pcurrent < max_ptr)
  {
    max_ptr2 = pcurrent + row_width;
    while(pcurrent < max_ptr2) {
      r = abs(pnabove[0] - pabove[0]);
      g = abs(pnabove[1] - pabove[1]);
      b = abs(pnabove[2] - pabove[2]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      r = abs(pncurrent[0] - pcurrent[0]);
      g = abs(pncurrent[1] - pcurrent[1]);
      b = abs(pncurrent[2] - pcurrent[2]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[0] = (pabove[0] + pbelow[0]) >> 1;
        pcurrent[1] = (pabove[1] + pbelow[1]) >> 1;
        pcurrent[2] = (pabove[2] + pbelow[2]) >> 1;
      }
      pabove += 3;
      pnabove += 3;
      pcurrent += 3;
      pncurrent += 3;
      pbelow += 3;
    }
    pcurrent += row_width;
    pncurrent += row_width;
    pabove += row_width;
    pnabove += row_width;
    pbelow += row_width;
    
  }
  
  /* Special case for the last line */
  max_ptr2 = pcurrent + row_width;
  while(pcurrent < max_ptr2) {
      r = abs(pnabove[0] - pabove[0]);
      g = abs(pnabove[1] - pabove[1]);
      b = abs(pnabove[2] - pabove[2]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      r = abs(pncurrent[0] - pcurrent[0]);
      g = abs(pncurrent[1] - pcurrent[1]);
      b = abs(pncurrent[2] - pcurrent[2]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[0] = pabove[0];
        pcurrent[1] = pabove[1];
        pcurrent[2] = pabove[2];
      }
      pabove += 3;
      pnabove += 3;
      pcurrent += 3;
      pncurrent += 3;
  }
}

/* BGR */
__attribute__((noinline)) void std_deinterlace_4field_bgr(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height)
{
  uint8_t *pcurrent, *pabove, *pncurrent, *pnabove, *pbelow;
  const unsigned int row_width = width*3;
  const uint8_t* const max_ptr = col1 + (row_width * (height-1));
  const uint8_t *max_ptr2;
  unsigned int b, g, r;
  unsigned int delta1, delta2;

  pcurrent = col1 + (width*3);
  pncurrent = col2 + (width*3);
  pabove = col1;
  pnabove = col2;
  pbelow = col1 + ((width*2)*3);
  while(pcurrent < max_ptr)
  {
    max_ptr2 = pcurrent + row_width;
    while(pcurrent < max_ptr2) {
      b = abs(pnabove[0] - pabove[0]);
      g = abs(pnabove[1] - pabove[1]);
      r = abs(pnabove[2] - pabove[2]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      b = abs(pncurrent[0] - pcurrent[0]);
      g = abs(pncurrent[1] - pcurrent[1]);
      r = abs(pncurrent[2] - pcurrent[2]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[0] = (pabove[0] + pbelow[0]) >> 1;
        pcurrent[1] = (pabove[1] + pbelow[1]) >> 1;
        pcurrent[2] = (pabove[2] + pbelow[2]) >> 1;
      }
      pabove += 3;
      pnabove += 3;
      pcurrent += 3;
      pncurrent += 3;
      pbelow += 3;
    }
    pcurrent += row_width;
    pncurrent += row_width;
    pabove += row_width;
    pnabove += row_width;
    pbelow += row_width;
    
  }
  
  /* Special case for the last line */
  max_ptr2 = pcurrent + row_width;
  while(pcurrent < max_ptr2) {
      b = abs(pnabove[0] - pabove[0]);
      g = abs(pnabove[1] - pabove[1]);
      r = abs(pnabove[2] - pabove[2]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      b = abs(pncurrent[0] - pcurrent[0]);
      g = abs(pncurrent[1] - pcurrent[1]);
      r = abs(pncurrent[2] - pcurrent[2]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[0] = pabove[0];
        pcurrent[1] = pabove[1];
        pcurrent[2] = pabove[2];
      }
      pabove += 3;
      pnabove += 3;
      pcurrent += 3;
      pncurrent += 3;
  }
}

/* RGBA */
__attribute__((noinline)) void std_deinterlace_4field_rgba(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height)
{
  uint8_t *pcurrent, *pabove, *pncurrent, *pnabove, *pbelow;
  const unsigned int row_width = width*4;
  const uint8_t* const max_ptr = col1 + (row_width * (height-1));
  const uint8_t *max_ptr2;
  unsigned int b, g, r;
  unsigned int delta1, delta2;

  pcurrent = col1 + row_width;
  pncurrent = col2 + row_width;
  pabove = col1;
  pnabove = col2;
  pbelow = col1 + (row_width*2);
  while(pcurrent < max_ptr)
  {
    max_ptr2 = pcurrent + row_width;
    while(pcurrent < max_ptr2) {
      r = abs(pnabove[0] - pabove[0]);
      g = abs(pnabove[1] - pabove[1]);
      b = abs(pnabove[2] - pabove[2]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      r = abs(pncurrent[0] - pcurrent[0]);
      g = abs(pncurrent[1] - pcurrent[1]);
      b = abs(pncurrent[2] - pcurrent[2]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[0] = (pabove[0] + pbelow[0]) >> 1;
        pcurrent[1] = (pabove[1] + pbelow[1]) >> 1;
        pcurrent[2] = (pabove[2] + pbelow[2]) >> 1;
      }
      pabove += 4;
      pnabove += 4;
      pcurrent += 4;
      pncurrent += 4;
      pbelow += 4;
    }
    pcurrent += row_width;
    pncurrent += row_width;
    pabove += row_width;
    pnabove += row_width;
    pbelow += row_width;
    
  }
  
  /* Special case for the last line */
  max_ptr2 = pcurrent + row_width;
  while(pcurrent < max_ptr2) {
      r = abs(pnabove[0] - pabove[0]);
      g = abs(pnabove[1] - pabove[1]);
      b = abs(pnabove[2] - pabove[2]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      r = abs(pncurrent[0] - pcurrent[0]);
      g = abs(pncurrent[1] - pcurrent[1]);
      b = abs(pncurrent[2] - pcurrent[2]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[0] = pabove[0];
        pcurrent[1] = pabove[1];
        pcurrent[2] = pabove[2];
      }
      pabove += 4;
      pnabove += 4;
      pcurrent += 4;
      pncurrent += 4;
  }
}

/* BGRA */
__attribute__((noinline)) void std_deinterlace_4field_bgra(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height)
{
  uint8_t *pcurrent, *pabove, *pncurrent, *pnabove, *pbelow;
  const unsigned int row_width = width*4;
  const uint8_t* const max_ptr = col1 + (row_width * (height-1));
  const uint8_t *max_ptr2;
  unsigned int b, g, r;
  unsigned int delta1, delta2;

  pcurrent = col1 + row_width;
  pncurrent = col2 + row_width;
  pabove = col1;
  pnabove = col2;
  pbelow = col1 + (row_width*2);
  while(pcurrent < max_ptr)
  {
    max_ptr2 = pcurrent + row_width;
    while(pcurrent < max_ptr2) {
      b = abs(pnabove[0] - pabove[0]);
      g = abs(pnabove[1] - pabove[1]);
      r = abs(pnabove[2] - pabove[2]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      b = abs(pncurrent[0] - pcurrent[0]);
      g = abs(pncurrent[1] - pcurrent[1]);
      r = abs(pncurrent[2] - pcurrent[2]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[0] = (pabove[0] + pbelow[0]) >> 1;
        pcurrent[1] = (pabove[1] + pbelow[1]) >> 1;
        pcurrent[2] = (pabove[2] + pbelow[2]) >> 1;
      }
      pabove += 4;
      pnabove += 4;
      pcurrent += 4;
      pncurrent += 4;
      pbelow += 4;
    }
    pcurrent += row_width;
    pncurrent += row_width;
    pabove += row_width;
    pnabove += row_width;
    pbelow += row_width;
    
  }
  
  /* Special case for the last line */
  max_ptr2 = pcurrent + row_width;
  while(pcurrent < max_ptr2) {
      b = abs(pnabove[0] - pabove[0]);
      g = abs(pnabove[1] - pabove[1]);
      r = abs(pnabove[2] - pabove[2]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      b = abs(pncurrent[0] - pcurrent[0]);
      g = abs(pncurrent[1] - pcurrent[1]);
      r = abs(pncurrent[2] - pcurrent[2]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[0] = pabove[0];
        pcurrent[1] = pabove[1];
        pcurrent[2] = pabove[2];
      }
      pabove += 4;
      pnabove += 4;
      pcurrent += 4;
      pncurrent += 4;
  }
}

/* ARGB */
__attribute__((noinline)) void std_deinterlace_4field_argb(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height)
{
  uint8_t *pcurrent, *pabove, *pncurrent, *pnabove, *pbelow;
  const unsigned int row_width = width*4;
  const uint8_t* const max_ptr = col1 + (row_width * (height-1));
  const uint8_t *max_ptr2;
  unsigned int b, g, r;
  unsigned int delta1, delta2;

  pcurrent = col1 + row_width;
  pncurrent = col2 + row_width;
  pabove = col1;
  pnabove = col2;
  pbelow = col1 + (row_width*2);
  while(pcurrent < max_ptr)
  {
    max_ptr2 = pcurrent + row_width;
    while(pcurrent < max_ptr2) {
      r = abs(pnabove[1] - pabove[1]);
      g = abs(pnabove[2] - pabove[2]);
      b = abs(pnabove[3] - pabove[3]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      r = abs(pncurrent[1] - pcurrent[1]);
      g = abs(pncurrent[2] - pcurrent[2]);
      b = abs(pncurrent[3] - pcurrent[3]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[1] = (pabove[1] + pbelow[1]) >> 1;
        pcurrent[2] = (pabove[2] + pbelow[2]) >> 1;
        pcurrent[3] = (pabove[3] + pbelow[3]) >> 1;
      }
      pabove += 4;
      pnabove += 4;
      pcurrent += 4;
      pncurrent += 4;
      pbelow += 4;
    }
    pcurrent += row_width;
    pncurrent += row_width;
    pabove += row_width;
    pnabove += row_width;
    pbelow += row_width;
    
  }
  
  /* Special case for the last line */
  max_ptr2 = pcurrent + row_width;
  while(pcurrent < max_ptr2) {
      r = abs(pnabove[1] - pabove[1]);
      g = abs(pnabove[2] - pabove[2]);
      b = abs(pnabove[3] - pabove[3]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      r = abs(pncurrent[1] - pcurrent[1]);
      g = abs(pncurrent[2] - pcurrent[2]);
      b = abs(pncurrent[3] - pcurrent[3]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[1] = pabove[1];
        pcurrent[2] = pabove[2];
        pcurrent[3] = pabove[3];
      }
      pabove += 4;
      pnabove += 4;
      pcurrent += 4;
      pncurrent += 4;
  }
}

/* ABGR */
__attribute__((noinline)) void std_deinterlace_4field_abgr(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height)
{
  uint8_t *pcurrent, *pabove, *pncurrent, *pnabove, *pbelow;
  const unsigned int row_width = width*4;
  const uint8_t* const max_ptr = col1 + (row_width * (height-1));
  const uint8_t *max_ptr2;
  unsigned int b, g, r;
  unsigned int delta1, delta2;

  pcurrent = col1 + row_width;
  pncurrent = col2 + row_width;
  pabove = col1;
  pnabove = col2;
  pbelow = col1 + (row_width*2);
  while(pcurrent < max_ptr)
  {
    max_ptr2 = pcurrent + row_width;
    while(pcurrent < max_ptr2) {
      b = abs(pnabove[1] - pabove[1]);
      g = abs(pnabove[2] - pabove[2]);
      r = abs(pnabove[3] - pabove[3]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      b = abs(pncurrent[1] - pcurrent[1]);
      g = abs(pncurrent[2] - pcurrent[2]);
      r = abs(pncurrent[3] - pcurrent[3]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[1] = (pabove[1] + pbelow[1]) >> 1;
        pcurrent[2] = (pabove[2] + pbelow[2]) >> 1;
        pcurrent[3] = (pabove[3] + pbelow[3]) >> 1;
      }
      pabove += 4;
      pnabove += 4;
      pcurrent += 4;
      pncurrent += 4;
      pbelow += 4;
    }
    pcurrent += row_width;
    pncurrent += row_width;
    pabove += row_width;
    pnabove += row_width;
    pbelow += row_width;
    
  }
  
  /* Special case for the last line */
  max_ptr2 = pcurrent + row_width;
  while(pcurrent < max_ptr2) {
      b = abs(pnabove[1] - pabove[1]);
      g = abs(pnabove[2] - pabove[2]);
      r = abs(pnabove[3] - pabove[3]);
      delta1 = (r + r + b + g + g + g + g + g)>>3;
      b = abs(pncurrent[1] - pcurrent[1]);
      g = abs(pncurrent[2] - pcurrent[2]);
      r = abs(pncurrent[3] - pcurrent[3]);
      delta2 = (r + r + b + g + g + g + g + g)>>3;
      if(((delta1 + delta2) >> 1) >= threshold) {
        pcurrent[1] = pabove[1];
        pcurrent[2] = pabove[2];
        pcurrent[3] = pabove[3];
      }
      pabove += 4;
      pnabove += 4;
      pcurrent += 4;
      pncurrent += 4;
  }
}

/* Grayscale SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_deinterlace_4field_gray8(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height) {

#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))
  union {
    uint32_t int32;
    uint8_t int8a[4];
  } threshold_mask;
  threshold_mask.int8a[0] = threshold;
  threshold_mask.int8a[1] = 0;
  threshold_mask.int8a[2] = threshold;
  threshold_mask.int8a[3] = 0;

  unsigned long row_width = width;
  uint8_t* max_ptr = col1 + (row_width * (height-2));
  uint8_t* max_ptr2 = col1 + row_width;

  __asm__ __volatile__ (
  /* Load the threshold */
  "mov %5, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  /* Zero the temporary register */
  "pxor %%xmm0, %%xmm0\n\t"

  "algo_ssse3_deinterlace_4field_gray8:\n\t"

  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "pmaxub %%xmm2, %%xmm1\n\t"
  "pminub %%xmm5, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "pmaxub %%xmm2, %%xmm1\n\t"
  "pminub %%xmm6, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together
  "movdqa %%xmm1, %%xmm2\n\t"

  /* Do the comparison on words instead of bytes because we don't have unsigned comparison */
  "punpcklbw %%xmm0, %%xmm1\n\t"           // Expand pixels 0-7 into words into xmm1
  "punpckhbw %%xmm0, %%xmm2\n\t"           // Expand pixels 8-15 into words into xmm2
  "pcmpgtw %%xmm4, %%xmm1\n\t"             // Compare average delta with threshold for pixels 0-7
  "pcmpgtw %%xmm4, %%xmm2\n\t"             // Compare average delta with threshold for pixels 8-15
  "packsswb %%xmm2, %%xmm1\n\t"            // Pack the comparison results into xmm1

  "movdqa (%0,%4), %%xmm2\n\t"             // Load pbelow
  "pavgb %%xmm5, %%xmm2\n\t"             // Average pabove and pbelow
  "pand %%xmm1, %%xmm2\n\t"              // Filter out pixels in avg that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm2, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent

  "sub %4, %0\n\t"                   // Restore pcurrent to pabove
  "sub %4, %1\n\t"                   // Restore pncurrent to pnabove

  /* Next pixels */
  "add $0x10, %0\n\t"                // Add 16 to pcurrent
  "add $0x10, %1\n\t"                // Add 16 to pncurrent

  /* Check if we reached the row end */
  "cmp %2, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_gray8\n\t"     // Go for another iteration

  /* Next row */
  "add %4, %0\n\t"                   // Add width to pcurrent
  "add %4, %1\n\t"                   // Add width to pncurrent
  "mov %0, %2\n\t"
  "add %4, %2\n\t"                   // Add width to max_ptr2

  /* Check if we reached the end */
  "cmp %3, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_gray8\n\t"     // Go for another iteration

  /* Special case for the last line */
  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "pmaxub %%xmm2, %%xmm1\n\t"
  "pminub %%xmm5, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "pmaxub %%xmm2, %%xmm1\n\t"
  "pminub %%xmm6, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together
  "movdqa %%xmm1, %%xmm2\n\t"

  /* Do the comparison on words instead of bytes because we don't have unsigned comparison */
  "punpcklbw %%xmm0, %%xmm1\n\t"           // Expand pixels 0-7 into words into xmm1
  "punpckhbw %%xmm0, %%xmm2\n\t"           // Expand pixels 8-15 into words into xmm2
  "pcmpgtw %%xmm4, %%xmm1\n\t"             // Compare average delta with threshold for pixels 0-7
  "pcmpgtw %%xmm4, %%xmm2\n\t"             // Compare average delta with threshold for pixels 8-15
  "packsswb %%xmm2, %%xmm1\n\t"            // Pack the comparison results into xmm1

  "pand %%xmm1, %%xmm5\n\t"              // Filter out pixels in pabove that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm5, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent
  :
  : "r" (col1), "r" (col2), "r" (max_ptr2), "r" (max_ptr), "r" (row_width), "m" (threshold_mask.int32)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "cc", "memory"
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* RGBA SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_deinterlace_4field_rgba(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))
  __attribute__((aligned(16))) static const uint8_t movemask2[16] = {1,1,1,1,1,0,0,2,9,9,9,9,9,8,8,10};

  const uint32_t threshold_val = threshold;

  unsigned long row_width = width*4;
  uint8_t* max_ptr = col1 + (row_width * (height-2));
  uint8_t* max_ptr2 = col1 + row_width;

  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "movdqa %6, %%xmm3\n\t"
  "mov %5, %%eax\n\t"
#if defined(__x86_64__)
  "movd %%eax, %%xmm8\n\t"
  "pshufd $0x0, %%xmm8, %%xmm8\n\t"
#endif
  /* Zero the temporary register */
  "pxor %%xmm0, %%xmm0\n\t"

  "algo_ssse3_deinterlace_4field_rgba:\n\t"

  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together

#if defined(__x86_64__)
  "pcmpgtd %%xmm8, %%xmm1\n\t"             // Compare average delta with the threshold
#else
  "movd %%eax, %%xmm7\n\t"               // Setup the threshold
  "pshufd $0x0, %%xmm7, %%xmm7\n\t"

  "pcmpgtd %%xmm7, %%xmm1\n\t"             // Compare average delta with the threshold
#endif
  "movdqa (%0,%4), %%xmm2\n\t"             // Load pbelow
  "pavgb %%xmm5, %%xmm2\n\t"             // Average pabove and pbelow
  "pand %%xmm1, %%xmm2\n\t"              // Filter out pixels in avg that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm2, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent

  "sub %4, %0\n\t"                   // Restore pcurrent to pabove
  "sub %4, %1\n\t"                   // Restore pncurrent to pnabove

  /* Next pixels */
  "add $0x10, %0\n\t"                // Add 16 to pcurrent
  "add $0x10, %1\n\t"                // Add 16 to pncurrent

  /* Check if we reached the row end */
  "cmp %2, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_rgba\n\t"    // Go for another iteration

  /* Next row */
  "add %4, %0\n\t"                   // Add width to pcurrent
  "add %4, %1\n\t"                   // Add width to pncurrent
  "mov %0, %2\n\t"
  "add %4, %2\n\t"                   // Add width to max_ptr2

  /* Check if we reached the end */
  "cmp %3, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_rgba\n\t"    // Go for another iteration

  /* Special case for the last line */
  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together

#if defined(__x86_64__)
  "pcmpgtd %%xmm8, %%xmm1\n\t"             // Compare average delta with the threshold
#else
  "movd %%eax, %%xmm7\n\t"               // Setup the threshold
  "pshufd $0x0, %%xmm7, %%xmm7\n\t"

  "pcmpgtd %%xmm7, %%xmm1\n\t"             // Compare average delta with the threshold
#endif
  "pand %%xmm1, %%xmm5\n\t"              // Filter out pixels in pabove that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm5, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent
  :
  : "r" (col1), "r" (col2), "r" (max_ptr2), "r" (max_ptr), "r" (row_width), "m" (threshold_val), "m" (*movemask2)
#if defined(__x86_64__)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "cc", "memory"
#else
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "cc", "memory"
#endif
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* BGRA SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_deinterlace_4field_bgra(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))
  __attribute__((aligned(16))) static const uint8_t movemask2[16] = {1,1,1,1,1,2,2,0,9,9,9,9,9,10,10,8};

  const uint32_t threshold_val = threshold;

  unsigned long row_width = width*4;
  uint8_t* max_ptr = col1 + (row_width * (height-2));
  uint8_t* max_ptr2 = col1 + row_width;

  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "movdqa %6, %%xmm3\n\t"
  "mov %5, %%eax\n\t"
#if defined(__x86_64__)
  "movd %%eax, %%xmm8\n\t"
  "pshufd $0x0, %%xmm8, %%xmm8\n\t"
#endif
  /* Zero the temporary register */
  "pxor %%xmm0, %%xmm0\n\t"

  "algo_ssse3_deinterlace_4field_bgra:\n\t"

  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together

#if defined(__x86_64__)
  "pcmpgtd %%xmm8, %%xmm1\n\t"             // Compare average delta with the threshold
#else
  "movd %%eax, %%xmm7\n\t"               // Setup the threshold
  "pshufd $0x0, %%xmm7, %%xmm7\n\t"

  "pcmpgtd %%xmm7, %%xmm1\n\t"             // Compare average delta with the threshold
#endif
  "movdqa (%0,%4), %%xmm2\n\t"             // Load pbelow
  "pavgb %%xmm5, %%xmm2\n\t"             // Average pabove and pbelow
  "pand %%xmm1, %%xmm2\n\t"              // Filter out pixels in avg that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm2, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent

  "sub %4, %0\n\t"                   // Restore pcurrent to pabove
  "sub %4, %1\n\t"                   // Restore pncurrent to pnabove

  /* Next pixels */
  "add $0x10, %0\n\t"                // Add 16 to pcurrent
  "add $0x10, %1\n\t"                // Add 16 to pncurrent

  /* Check if we reached the row end */
  "cmp %2, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_bgra\n\t"    // Go for another iteration

  /* Next row */
  "add %4, %0\n\t"                   // Add width to pcurrent
  "add %4, %1\n\t"                   // Add width to pncurrent
  "mov %0, %2\n\t"
  "add %4, %2\n\t"                   // Add width to max_ptr2

  /* Check if we reached the end */
  "cmp %3, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_bgra\n\t"    // Go for another iteration

  /* Special case for the last line */
  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together

#if defined(__x86_64__)
  "pcmpgtd %%xmm8, %%xmm1\n\t"             // Compare average delta with the threshold
#else
  "movd %%eax, %%xmm7\n\t"               // Setup the threshold
  "pshufd $0x0, %%xmm7, %%xmm7\n\t"

  "pcmpgtd %%xmm7, %%xmm1\n\t"             // Compare average delta with the threshold
#endif
  "pand %%xmm1, %%xmm5\n\t"              // Filter out pixels in pabove that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm5, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent
  :
  : "r" (col1), "r" (col2), "r" (max_ptr2), "r" (max_ptr), "r" (row_width), "m" (threshold_val), "m" (*movemask2)
#if defined(__x86_64__)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "cc", "memory"
#else
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "cc", "memory"
#endif
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* ARGB SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_deinterlace_4field_argb(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))
  __attribute__((aligned(16))) static const uint8_t movemask2[16] = {2,2,2,2,2,1,1,3,10,10,10,10,10,9,9,11};

  const uint32_t threshold_val = threshold;

  unsigned long row_width = width*4;
  uint8_t* max_ptr = col1 + (row_width * (height-2));
  uint8_t* max_ptr2 = col1 + row_width;

  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "movdqa %6, %%xmm3\n\t"
  "mov %5, %%eax\n\t"
#if defined(__x86_64__)
  "movd %%eax, %%xmm8\n\t"
  "pshufd $0x0, %%xmm8, %%xmm8\n\t"
#endif
  /* Zero the temporary register */
  "pxor %%xmm0, %%xmm0\n\t"

  "algo_ssse3_deinterlace_4field_argb:\n\t"

  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together

#if defined(__x86_64__)
  "pcmpgtd %%xmm8, %%xmm1\n\t"             // Compare average delta with the threshold
#else
  "movd %%eax, %%xmm7\n\t"               // Setup the threshold
  "pshufd $0x0, %%xmm7, %%xmm7\n\t"

  "pcmpgtd %%xmm7, %%xmm1\n\t"             // Compare average delta with the threshold
#endif
  "movdqa (%0,%4), %%xmm2\n\t"             // Load pbelow
  "pavgb %%xmm5, %%xmm2\n\t"             // Average pabove and pbelow
  "pand %%xmm1, %%xmm2\n\t"              // Filter out pixels in avg that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm2, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent

  "sub %4, %0\n\t"                   // Restore pcurrent to pabove
  "sub %4, %1\n\t"                   // Restore pncurrent to pnabove

  /* Next pixels */
  "add $0x10, %0\n\t"                // Add 16 to pcurrent
  "add $0x10, %1\n\t"                // Add 16 to pncurrent

  /* Check if we reached the row end */
  "cmp %2, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_argb\n\t"    // Go for another iteration

  /* Next row */
  "add %4, %0\n\t"                   // Add width to pcurrent
  "add %4, %1\n\t"                   // Add width to pncurrent
  "mov %0, %2\n\t"
  "add %4, %2\n\t"                   // Add width to max_ptr2

  /* Check if we reached the end */
  "cmp %3, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_argb\n\t"    // Go for another iteration

  /* Special case for the last line */
  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together

#if defined(__x86_64__)
  "pcmpgtd %%xmm8, %%xmm1\n\t"             // Compare average delta with the threshold
#else
  "movd %%eax, %%xmm7\n\t"               // Setup the threshold
  "pshufd $0x0, %%xmm7, %%xmm7\n\t"

  "pcmpgtd %%xmm7, %%xmm1\n\t"             // Compare average delta with the threshold
#endif
  "pand %%xmm1, %%xmm5\n\t"              // Filter out pixels in pabove that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm5, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent
  :
  : "r" (col1), "r" (col2), "r" (max_ptr2), "r" (max_ptr), "r" (row_width), "m" (threshold_val), "m" (*movemask2)
#if defined(__x86_64__)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "cc", "memory"
#else
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "cc", "memory"
#endif
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}

/* ABGR SSSE3 */
#if defined(__i386__) || defined(__x86_64__)
__attribute__((noinline,__target__("ssse3")))
#endif
void ssse3_deinterlace_4field_abgr(uint8_t* col1, uint8_t* col2, unsigned int threshold, unsigned int width, unsigned int height) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))
  __attribute__((aligned(16))) static const uint8_t movemask2[16] = {2,2,2,2,2,3,3,1,10,10,10,10,10,11,11,9};

  const uint32_t threshold_val = threshold;

  unsigned long row_width = width*4;
  uint8_t* max_ptr = col1 + (row_width * (height-2));
  uint8_t* max_ptr2 = col1 + row_width;

  __asm__ __volatile__ (
  "mov $0x1F1F1F1F, %%eax\n\t"
  "movd %%eax, %%xmm4\n\t"
  "pshufd $0x0, %%xmm4, %%xmm4\n\t"
  "movdqa %6, %%xmm3\n\t"
  "mov %5, %%eax\n\t"
#if defined(__x86_64__)
  "movd %%eax, %%xmm8\n\t"
  "pshufd $0x0, %%xmm8, %%xmm8\n\t"
#endif
  /* Zero the temporary register */
  "pxor %%xmm0, %%xmm0\n\t"

  "algo_ssse3_deinterlace_4field_abgr:\n\t"

  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together

#if defined(__x86_64__)
  "pcmpgtd %%xmm8, %%xmm1\n\t"             // Compare average delta with the threshold
#else
  "movd %%eax, %%xmm7\n\t"               // Setup the threshold
  "pshufd $0x0, %%xmm7, %%xmm7\n\t"

  "pcmpgtd %%xmm7, %%xmm1\n\t"             // Compare average delta with the threshold
#endif
  "movdqa (%0,%4), %%xmm2\n\t"             // Load pbelow
  "pavgb %%xmm5, %%xmm2\n\t"             // Average pabove and pbelow
  "pand %%xmm1, %%xmm2\n\t"              // Filter out pixels in avg that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm2, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent

  "sub %4, %0\n\t"                   // Restore pcurrent to pabove
  "sub %4, %1\n\t"                   // Restore pncurrent to pnabove

  /* Next pixels */
  "add $0x10, %0\n\t"                // Add 16 to pcurrent
  "add $0x10, %1\n\t"                // Add 16 to pncurrent

  /* Check if we reached the row end */
  "cmp %2, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_abgr\n\t"    // Go for another iteration

  /* Next row */
  "add %4, %0\n\t"                   // Add width to pcurrent
  "add %4, %1\n\t"                   // Add width to pncurrent
  "mov %0, %2\n\t"
  "add %4, %2\n\t"                   // Add width to max_ptr2

  /* Check if we reached the end */
  "cmp %3, %0\n\t"
  "jb algo_ssse3_deinterlace_4field_abgr\n\t"    // Go for another iteration

  /* Special case for the last line */
  /* Load pabove into xmm1 and pnabove into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm5\n\t" /* Keep backup of pabove in xmm5 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"
  "movdqa %%xmm1, %%xmm7\n\t" /* Backup of delta2 in xmm7 for now */

  /* Next row */
  "add %4, %0\n\t"
  "add %4, %1\n\t"

  /* Load pcurrent into xmm1 and pncurrent into xmm2 */
  "movdqa (%0), %%xmm1\n\t"
  "movdqa (%1), %%xmm2\n\t"
  "movdqa %%xmm1, %%xmm6\n\t" /* Keep backup of pcurrent in xmm6 */
  "psrlq $0x3, %%xmm1\n\t"
  "psrlq $0x3, %%xmm2\n\t"
  "pand %%xmm4, %%xmm1\n\t"
  "pand %%xmm4, %%xmm2\n\t"
  "psubb %%xmm2, %%xmm1\n\t"
  "pabsb %%xmm1, %%xmm2\n\t"
  "movdqa %%xmm2, %%xmm1\n\t"
  "punpckldq %%xmm1, %%xmm1\n\t"
  "pshufb %%xmm3, %%xmm1\n\t"
  "psadbw %%xmm0, %%xmm1\n\t"
  "punpckhdq %%xmm2, %%xmm2\n\t"
  "pshufb %%xmm3, %%xmm2\n\t"
  "psadbw %%xmm0, %%xmm2\n\t"
  "packuswb %%xmm2, %%xmm1\n\t"

  "pavgb %%xmm7, %%xmm1\n\t"             // Average the two deltas together

#if defined(__x86_64__)
  "pcmpgtd %%xmm8, %%xmm1\n\t"             // Compare average delta with the threshold
#else
  "movd %%eax, %%xmm7\n\t"               // Setup the threshold
  "pshufd $0x0, %%xmm7, %%xmm7\n\t"

  "pcmpgtd %%xmm7, %%xmm1\n\t"             // Compare average delta with the threshold
#endif
  "pand %%xmm1, %%xmm5\n\t"              // Filter out pixels in pabove that shouldn't be copied
  "pandn %%xmm6, %%xmm1\n\t"             // Filter out pixels in pcurrent that should be replaced

  "por %%xmm5, %%xmm1\n\t"               // Put the new values in pcurrent
  "movntdq %%xmm1, (%0)\n\t"             // Write pcurrent
  :
  : "r" (col1), "r" (col2), "r" (max_ptr2), "r" (max_ptr), "r" (row_width), "m" (threshold_val), "m" (*movemask2)
#if defined(__x86_64__)
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "cc", "memory"
#else
  : "%eax", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "cc", "memory"
#endif
  );
#else
  Panic("SSE function called on a non x86\\x86-64 platform");
#endif
}