Added a program icon.

Makefile

@@ -20,7 +20,7 @@ UFLAGS =
 #       hence we ignore the incompliance in our code.
 # NOTE: We allow function declrations with specifying void
 #       (ex, void test() is allowed).
-FLAGS = -ansi -pedantic -pedantic-errors -Wno-long-long \
+FLAGS = -ansi -pedantic -pedantic-errors -Wno-long-long -Wno-overlength-strings \
 		-Wno-strict-prototypes -Wall -Wextra -fno-caret-diagnostics \
 		-fno-show-column -Wno-missing-field-initializers \
 		-Wno-unused-function -Wno-unused-parameter -Wno-unused-variable \

sdl_handmade.c

@@ -25,6 +25,8 @@
 #include <x86intrin.h>
 #endif
 
+#include "program_icon.c"
+
 #define RESOLUTION_WIDTH  960
 #define RESOLUTION_HEIGHT 540
 
@@ -727,12 +729,40 @@ S32 main(S32 argc, char *argv[])
     if(Window) {
         SDL_Renderer *Renderer;
 
+        SDL_Surface* icon;
+        Uint32 rmask, gmask, bmask, amask;
+
         SDL_DisplayMode display_mode;
         SDL_GetCurrentDisplayMode(0, &display_mode);
 
         Renderer = SDL_CreateRenderer(Window, -1, SDL_RENDERER_PRESENTVSYNC);
         SDL_SetWindowPosition(Window, (display_mode.w - RESOLUTION_WIDTH),
                                       (display_mode.h - RESOLUTION_HEIGHT));
+
+        /* Set program icon. */
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+        int shift = (program_icon.bytes_per_pixel == 3) ? 8 : 0;
+        rmask = 0xff000000 >> shift;
+        gmask = 0x00ff0000 >> shift;
+        bmask = 0x0000ff00 >> shift;
+        amask = 0x000000ff >> shift;
+#else
+        rmask = 0x000000ff;
+        gmask = 0x0000ff00;
+        bmask = 0x00ff0000;
+        amask = (program_icon.bytes_per_pixel == 3) ? 0 : 0xff000000;
+#endif
+
+        icon = SDL_CreateRGBSurfaceFrom(
+                (void *)program_icon.pixel_data,
+                program_icon.width, program_icon.height,
+                program_icon.bytes_per_pixel * 8,
+                program_icon.bytes_per_pixel * program_icon.width,
+                rmask, gmask, bmask, amask);
+
+        SDL_SetWindowIcon(Window, icon);
+        SDL_FreeSurface(icon);
+
         /* "Wayland needs an event loop and rendering or it won't function."
          * https://github.com/libsdl-org/SDL/issues/7699#issuecomment-1545684792 */
         /* NOTE: This means that we need to readraw to even resize the
@@ -751,6 +781,7 @@ S32 main(S32 argc, char *argv[])
     void *BaseAddress = (void *)(0);
 #endif
 
+
             GlobalRunning = TRUE;
 
             Dimension = SDLGetWindowDimension(Window);