2020-09-19 17:30:37 (UTC-03:00)

Marcel Rodrigues <marcelgmr@gmail.com>

example: handle transparent background.

diff --git a/example.c b/example.c
index 8360285..c5d8c93 100644
--- a/example.c
+++ b/example.c
@@ -89,8 +89,13 @@ main(int argc, char *argv[])
         color = frame;
         for (i = 0; i < gif->height; i++) {
             for (j = 0; j < gif->width; j++) {
+                if (memcmp(&gif->palette->colors[gif->bgindex*3], color, 3))
+                    pixel = SDL_MapRGB(surface->format, color[0], color[1], color[2]);
+                else if (((i >> 2) + (j >> 2)) & 1)
+                    pixel = SDL_MapRGB(surface->format, 0x7F, 0x7F, 0x7F);
+                else
+                    pixel = SDL_MapRGB(surface->format, 0x00, 0x00, 0x00);
                 addr = surface->pixels + (i * surface->pitch + j * sizeof(pixel));
-                pixel = SDL_MapRGB(surface->format, color[0], color[1], color[2]);
                 memcpy(addr, &pixel, sizeof(pixel));
                 color += 3;
             }