|Linux & Unix Commands - Search Man Pages
SDL_DisplayFormatAlpha(3) SDL API Reference SDL_DisplayFormatAlpha(3)
SDL_DisplayFormatAlpha - Convert a surface to the display format
SDL_Surface *SDL_DisplayFormatAlpha(SDL_Surface *surface);
This function takes a surface and copies it to a new surface of the pixel format and col-
ors of the video framebuffer plus an alpha channel, suitable for fast blitting onto the
display surface. It calls SDL_ConvertSurface
If you want to take advantage of hardware colorkey or alpha blit acceleration, you should
set the colorkey and alpha value before calling this function.
This function can be used to convert a colourkey to an alpha channel, if the SDL_SRCCOL-
ORKEY flag is set on the surface. The generated surface will then be transparent (alpha=0)
where the pixels match the colourkey, and opaque (alpha=255) elsewhere.
If the conversion fails or runs out of memory, it returns NULL
SDL_ConvertSurface, SDL_SetAlpha, SDL_SetColorKey, SDL_DisplayFormat, SDL_Surface
SDL Tue 11 Sep 2001, 23:01 SDL_DisplayFormatAlpha(3)
All times are GMT -4. The time now is 11:24 AM.