[SDL] Alpha blending transparent PNGs

[Cracker]

            Hello everybody!First, I'm sorry if this question was asked already, I've searched, but looks like nobody encountered this problem.In my program, I'm using SDL_DisplayFormatAlpha to convert the loaded image, because I'm using transparent PNGs. I also want to fade in/out these images, but I can't find a way to do that. SDL_SetAlpha works only if I convert the image with SDL_DisplayFormat, so ignoring the PNG's built-in alpha information, but it doesn't seems to work at all if I try to set the alpha value of an image which has built-in transparency. Is there a way to do that? I think it can be done somehow with SDL_GetRGBA/SDL_MapRGBA, but I have no idea.Best Regards,

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