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SDL Wiki


Copy an existing surface to a new surface of the specified format.


SDL_Surface* SDL_ConvertSurface
    (SDL_Surface * src, const SDL_PixelFormat * fmt, Uint32 flags);

Function Parameters


the existing SDL_Surface structure to convert


the SDL_PixelFormat structure that the new surface is optimized for


the flags are unused and should be set to 0; this is a leftover from SDL 1.2's API

Return Value

Returns the new SDL_Surface structure that is created or NULL if it fails; call SDL_GetError() for more information.


This function is used to optimize images for faster repeat blitting. This is accomplished by converting the original and storing the result as a new surface. The new, optimized surface can then be used as the source for future blits, making them faster.

Code Examples

// SDL_Surface *input = ...;
SDL_PixelFormat *format = SDL_AllocFormat(SDL_PIXELFORMAT_RGBA32);
SDL_Surface *output = SDL_ConvertSurface(input, format, 0);

CategoryAPI, CategorySurface

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