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set linesize in WriteBuffer which also sets colours, width, etc. Fixes segfault when streaming from jpegs

This commit is contained in:
Isaac Connor 2020-07-23 17:14:56 -04:00
parent 4f3b6a063e
commit cceb010048
2 changed files with 28 additions and 19 deletions
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14
src/zm_image.cpp
View File

@ -504,6 +504,7 @@ uint8_t* Image::WriteBuffer(
}
if ( p_width != width || p_height != height || p_colours != colours || p_subpixelorder != subpixelorder ) {
unsigned int newsize = (p_width * p_height) * p_colours;
if ( buffer == NULL ) {
@ -524,6 +525,7 @@ uint8_t* Image::WriteBuffer(
width = p_width;
height = p_height;
colours = p_colours;
linesize = p_width * p_colours;
subpixelorder = p_subpixelorder;
pixels = height*width;
size = newsize;
@ -899,14 +901,11 @@ bool Image::ReadJpeg(const char *filename, unsigned int p_colours, unsigned int
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 ) {
@ -927,10 +926,8 @@ bool Image::ReadJpeg(const char *filename, unsigned int p_colours, unsigned int
#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
@ -954,8 +951,7 @@ cinfo->out_color_space = JCS_RGB;
new_subpixelorder = ZM_SUBPIX_ORDER_RGB;
}
break;
}
}
} // end switch p_colours
if ( WriteBuffer(new_width, new_height, new_colours, new_subpixelorder) == NULL ) {
Error("Failed requesting writeable buffer for reading JPEG image.");
@ -2787,7 +2783,7 @@ void Image::Scale( unsigned int factor ) {
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++ ) {
for ( unsigned int y = 0; y < height; y++ ) {
h_count += factor;
h_index = h_count/ZM_SCALE_BASE;
if ( h_index > last_h_index ) {
@ -2796,7 +2792,7 @@ void Image::Scale( unsigned int factor ) {
last_w_index = 0;
unsigned char *ps = &buffer[y*wc];
for ( unsigned int x = 0; x < (unsigned int)width; x++ ) {
for ( unsigned int x = 0; x < width; x++ ) {
w_count += factor;
w_index = w_count/ZM_SCALE_BASE;

17
src/zm_image.h
View File

@ -201,9 +201,22 @@ public:
width = linesize = height = colours = size = pixels = subpixelorder = 0;
}
void Assign( unsigned int p_width, unsigned int p_height, unsigned int p_colours, unsigned int p_subpixelorder, const uint8_t* new_buffer, const size_t buffer_size);
void Assign(
unsigned int p_width,
unsigned int p_height,
unsigned int p_colours,
unsigned int p_subpixelorder,
const uint8_t* new_buffer,
const size_t buffer_size);
void Assign(const Image &image);
void 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);
void 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);
inline void CopyBuffer(const Image &image) {
Assign(image);