Thread: SDL - IMG_Load() question

Hi,

I'm using IMG_Load() to load a PNG image with a transparent background, but when I apply the surface to the screen I get a coloured background. Sometimes green and sometimes white.

I can give it a background and the colourkey the background out, but IMG_Load() should be able to do this itself according to lazy foo.

I'm pretty new to SDL so perhaps I'm missing something obvious, thanks

Originally Posted by guest

Never use transparent backgrounds...set a color you wont use then just set the pixel to transparent.


Check here...you will see how it works. http://lazyfoo.net/SDL_tutorials/lesson05/index.php






Uint32 colorkey = SDL_MapRGB( optimizedImage->format, 0, 0xFF, 0xFF );
SDL_SetColorKey( optimizedImage, SDL_SRCCOLORKEY, colorkey );

this will remove 00ffff

0 RED = 0
255: Blue = 0xFF
255: Green = 0xFF

That's exactly what I've been doing, and it works fine. I was just wondering why transparent backgrounds haven't been working properly