158 lines
5.3 KiB
C
158 lines
5.3 KiB
C
//
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// ZoneMinder RGB Interface, $Date$, $Revision$
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// Copyright (C) 2001-2008 Philip Coombes
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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#ifndef ZM_RGB_H
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#define ZM_RGB_H
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typedef uint32_t Rgb; // RGB colour type
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#define WHITE 0xff
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#define WHITE_R 0xff
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#define WHITE_G 0xff
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#define WHITE_B 0xff
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#define BLACK 0x00
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#define BLACK_R 0x00
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#define BLACK_G 0x00
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#define BLACK_B 0x00
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#define RGB_WHITE (0x00ffffff)
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#define RGB_BLACK (0x00000000)
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#define RGB_RED (0x000000ff)
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#define RGB_GREEN (0x0000ff00)
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#define RGB_BLUE (0x00ff0000)
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#define RGB_ORANGE (0x0000a5ff)
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#define RGB_PURPLE (0x00800080)
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#define RGB_TRANSPARENT (0x01000000)
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#define RGB_VAL(v,c) (((v)>>(16-((c)*8)))&0xff)
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/* RGB or RGBA macros */
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#define BLUE_VAL_RGBA(v) (((v)>>16)&0xff)
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#define GREEN_VAL_RGBA(v) (((v)>>8)&0xff)
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#define RED_VAL_RGBA(v) ((v)&0xff)
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#define ALPHA_VAL_RGBA(v) ((v)>>24)&0xff)
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#define RED_PTR_RGBA(ptr) (*((uint8_t*)ptr))
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#define GREEN_PTR_RGBA(ptr) (*((uint8_t*)ptr+1))
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#define BLUE_PTR_RGBA(ptr) (*((uint8_t*)ptr+2))
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#define ALPHA_PTR_RGBA(ptr) (*((uint8_t*)ptr+3))
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/* BGR or BGRA */
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#define RED_VAL_BGRA(v) (((v)>>16)&0xff)
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#define GREEN_VAL_BGRA(v) (((v)>>8)&0xff)
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#define BLUE_VAL_BGRA(v) ((v)&0xff)
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#define ALPHA_VAL_BGRA(v) ((v)>>24)&0xff)
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#define RED_PTR_BGRA(ptr) (*((uint8_t*)ptr+2))
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#define GREEN_PTR_BGRA(ptr) (*((uint8_t*)ptr+1))
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#define BLUE_PTR_BGRA(ptr) (*((uint8_t*)ptr))
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#define ALPHA_PTR_BGRA(ptr) (*((uint8_t*)ptr+3))
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/* ARGB */
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#define BLUE_VAL_ARGB(v) (((v)>>24)&0xff)
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#define GREEN_VAL_ARGB(v) (((v)>>16)&0xff)
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#define RED_VAL_ARGB(v) (((v)>>8)&0xff)
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#define ALPHA_VAL_ARGB(v) ((v)&0xff)
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#define RED_PTR_ARGB(ptr) (*((uint8_t*)ptr+1))
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#define GREEN_PTR_ARGB(ptr) (*((uint8_t*)ptr+2))
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#define BLUE_PTR_ARGB(ptr) (*((uint8_t*)ptr+3))
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#define ALPHA_PTR_ARGB(ptr) (*((uint8_t*)ptr))
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/* ABGR */
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#define BLUE_VAL_ABGR(v) (((v)>>8)&0xff)
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#define GREEN_VAL_ABGR(v) (((v)>>16)&0xff)
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#define RED_VAL_ABGR(v) (((v)>>24)&0xff)
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#define ALPHA_VAL_ABGR(v) ((v)&0xff)
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#define RED_PTR_ABGR(ptr) (*((uint8_t*)ptr+3))
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#define GREEN_PTR_ABGR(ptr) (*((uint8_t*)ptr+2))
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#define BLUE_PTR_ABGR(ptr) (*((uint8_t*)ptr+1))
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#define ALPHA_PTR_ABGR(ptr) (*((uint8_t*)ptr))
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#define RGBA_BGRA_ZEROALPHA(v) ((v)&0x00ffffff)
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#define ARGB_ABGR_ZEROALPHA(v) ((v)&0xffffff00)
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/* ITU-R BT.709: Y = (0.2126 * R) + (0.7152 * G) + (0.0722 * B) */
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/* ITU-R BT.601: Y = (0.299 * R) + (0.587 * G) + (0.114 * B) */
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/* The formulas below produce an almost identical result to the weighted algorithms from the ITU-R BT.601 standard and the newer ITU-R BT.709 standard, but a lot faster */
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// #define RGB_FASTLUM_SINGLE_ITU709(v) ((RED(v)+RED(v)+BLUE(v)+GREEN(v)+GREEN(v)+GREEN(v)+GREEN(v)+GREEN(v))>>3)
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// #define RGB_FASTLUM_VALUES_ITU709(ra,ga,ba) (((ra)+(ra)+(ba)+(ga)+(ga)+(ga)+(ga)+(ga))>>3)
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// #define RGB_FASTLUM_SINGLE_ITU601(v) ((RED(v)+RED(v)+RED(v)+BLUE(v)+GREEN(v)+GREEN(v)+GREEN(v)+GREEN(v))>>3)
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// #define RGB_FASTLUM_VALUES_ITU601(ra,ga,ba) (((ra)+(ra)+(ra)+(ba)+(ga)+(ga)+(ga)+(ga))>>3)
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/* ZM colours */
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#define ZM_COLOUR_RGB32 4
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#define ZM_COLOUR_RGB24 3
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#define ZM_COLOUR_GRAY8 1
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/* Subpixel ordering */
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/* Based on byte order naming. For example, for ARGB (on both little endian or big endian) byte+0 should be alpha, byte+1 should be red, and so on. */
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#define ZM_SUBPIX_ORDER_NONE 2
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#define ZM_SUBPIX_ORDER_RGB 6
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#define ZM_SUBPIX_ORDER_BGR 5
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#define ZM_SUBPIX_ORDER_BGRA 7
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#define ZM_SUBPIX_ORDER_RGBA 8
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#define ZM_SUBPIX_ORDER_ABGR 9
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#define ZM_SUBPIX_ORDER_ARGB 10
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/* A macro to use default subpixel order for a specified colour. */
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/* for grayscale it will use NONE, for 3 colours it will use R,G,B, for 4 colours it will use R,G,B,A */
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#define ZM_SUBPIX_ORDER_DEFAULT_FOR_COLOUR(c) ((c)<<1)
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/* Convert RGB colour value into BGR\ARGB\ABGR */
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inline Rgb rgb_convert(Rgb p_col, int p_subpixorder) {
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Rgb result;
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switch(p_subpixorder) {
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case ZM_SUBPIX_ORDER_BGR:
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case ZM_SUBPIX_ORDER_BGRA:
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{
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BLUE_PTR_BGRA(&result) = BLUE_VAL_RGBA(p_col);
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GREEN_PTR_BGRA(&result) = GREEN_VAL_RGBA(p_col);
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RED_PTR_BGRA(&result) = RED_VAL_RGBA(p_col);
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}
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break;
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case ZM_SUBPIX_ORDER_ARGB:
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{
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BLUE_PTR_ARGB(&result) = BLUE_VAL_RGBA(p_col);
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GREEN_PTR_ARGB(&result) = GREEN_VAL_RGBA(p_col);
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RED_PTR_ARGB(&result) = RED_VAL_RGBA(p_col);
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}
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break;
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case ZM_SUBPIX_ORDER_ABGR:
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{
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BLUE_PTR_ABGR(&result) = BLUE_VAL_RGBA(p_col);
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GREEN_PTR_ABGR(&result) = GREEN_VAL_RGBA(p_col);
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RED_PTR_ABGR(&result) = RED_VAL_RGBA(p_col);
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}
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break;
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/* Grayscale */
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case ZM_SUBPIX_ORDER_NONE:
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result = p_col & 0xff;
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break;
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default:
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return p_col;
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break;
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}
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return result;
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}
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#endif // ZM_RGB_H
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