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Convert image format to core format, when the core requests it.

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This commit is contained in:
Michael Drake 2013-05-20 13:07:40 +01:00
parent 943025ddb0
commit 7ee2573f17
1 changed files with 51 additions and 1 deletions
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52
gtk/bitmap.c
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@ -185,11 +185,56 @@ bool bitmap_get_opaque(void *vbitmap)
unsigned char *bitmap_get_buffer(void *vbitmap)
{
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
int pixel_loop;
int pixel_count;
uint32_t *pixels;
uint32_t pixel;
cairo_format_t fmt;
assert(gbitmap);
cairo_surface_flush(gbitmap->surface);
pixels = (uint32_t *)cairo_image_surface_get_data(gbitmap->surface);
if (!gbitmap->converted)
return (unsigned char *) pixels;
fmt = cairo_image_surface_get_format(gbitmap->surface);
pixel_count = cairo_image_surface_get_width(gbitmap->surface) *
cairo_image_surface_get_height(gbitmap->surface);
if (fmt == CAIRO_FORMAT_RGB24) {
for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
pixel = pixels[pixel_loop];
pixels[pixel_loop] = (pixel & 0xff00ff00) |
((pixel & 0xff) << 16) |
((pixel & 0xff0000) >> 16);
}
} else {
uint32_t t, r, g, b;
for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
pixel = pixels[pixel_loop];
t = (pixel & 0xff000000) >> 24;
if (t == 0) {
pixels[pixel_loop] = 0;
} else {
r = ((pixel & 0xff0000) >> 8) / t;
g = ((pixel & 0xff00)) / t;
b = ((pixel & 0xff) << 8) / t;
r = (r > 255) ? 255 : r;
g = (g > 255) ? 255 : g;
b = (b > 255) ? 255 : b;
pixels[pixel_loop] = (t << 24) |
(r) | (g << 8) | (b << 16);
}
}
}
gbitmap->converted = false;
return cairo_image_surface_get_data(gbitmap->surface);
return (unsigned char *) pixels;
}
@ -286,6 +331,11 @@ void bitmap_modified(void *vbitmap) {
cairo_image_surface_get_height(gbitmap->surface);
pixels = (uint32_t *)cairo_image_surface_get_data(gbitmap->surface);
if (gbitmap->converted) {
cairo_surface_mark_dirty(gbitmap->surface);
return;
}
if (fmt == CAIRO_FORMAT_RGB24) {
for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
pixel = pixels[pixel_loop];