Function gui_prepare

src/lua-engine.cpp:3499–3505

Common code by the gui library: make sure the screen array is ready

// Common code by the gui library: make sure the screen array is ready
static void gui_prepare() {
	if (!gui_data)
		gui_data = (uint8*) FCEU_dmalloc(LUA_SCREEN_WIDTH*LUA_SCREEN_HEIGHT*4);
	if (gui_used != GUI_USED_SINCE_LAST_DISPLAY)
		memset(gui_data, 0, LUA_SCREEN_WIDTH*LUA_SCREEN_HEIGHT*4);
	gui_used = GUI_USED_SINCE_LAST_DISPLAY;
}

// pixform for lua graphics
#define BUILD_PIXEL_ARGB8888(A,R,G,B) (((int) (A) << 24) | ((int) (R) << 16) | ((int) (G) << 8) | (int) (B))