examples: add sdl.PollEvent() to allow window to show up on macOS

Signed-off-by: Lilis Iskandar <lilis@veand.co>

examples/gfx/gfx.c

@@ -9,6 +9,7 @@ int main()
 {
 	SDL_Window *window;
 	SDL_Renderer *renderer;
+	SDL_Event event;
 	Sint16 vx[] = { 100, 300, 200 };
 	Sint16 vy[] = { 100, 100, 300 };
 
@@ -27,6 +28,7 @@ int main()
 	filledPolygonColor(renderer, vx, vy, 3, 0xFFFF0000);
 
 	SDL_RenderPresent(renderer);
+	SDL_PollEvent(&event);
 	SDL_Delay(3000);
 
 	SDL_DestroyRenderer(renderer);

examples/gfx/gfx.go

@@ -48,6 +48,7 @@ func run() int {
 	gfx.StringColor(renderer, 16, 16, "GFX Demo", sdl.Color{0, 255, 0, 255})
 
 	renderer.Present()
+	sdl.PollEvent()
 	sdl.Delay(3000)
 
 	return 0

examples/render_queue/render_queue.go

@@ -136,6 +136,7 @@ func run() int {
 	})
 
 	sdl.Do(func() {
+		sdl.PollEvent()
 		sdl.Delay(2000)
 	})
 

examples/text/text.go

@@ -55,6 +55,7 @@ func run() int {
 
 	// Show the pixels for a while
 	window.UpdateSurface()
+	sdl.PollEvent()
 	sdl.Delay(3000)
 
 	return 0

examples/texture/texture.go

@@ -56,6 +56,7 @@ func run() int {
 	renderer.Copy(texture, &src, &dst)
 	renderer.Present()
 
+	sdl.PollEvent()
 	sdl.Delay(2000)
 
 	return 0

examples/texture_png/texture_png.c

@@ -46,6 +46,8 @@ int main()
 	SDL_RenderCopy(renderer, texture, &src, &dst);
 	SDL_RenderPresent(renderer);
 
+	SDL_Event event;
+	SDL_PollEvent(&event);
 	SDL_Delay(2000);
 
 	SDL_DestroyTexture(texture);

examples/texture_png/texture_png.go

@@ -58,6 +58,7 @@ func run() int {
 	renderer.Copy(texture, &src, &dst)
 	renderer.Present()
 
+	sdl.PollEvent()
 	sdl.Delay(2000)
 
 	return 0