This is new wiki software and old wiki content. It's a work in progress!
Here's the explanation.
Be gentle, report bugs, leave feedback on pages, or just edit them yourself! Thanks!

SDL Wiki

SDL_ConvertSurface

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

Syntax

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

Function Parameters

src

the existing SDL_Surface structure to convert

fmt

the SDL_PixelFormat structure that the new surface is optimized for

flags

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.

Remarks

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);
SDL_FreeFormat(format);
SDL_AllocFormat
SDL_ConvertSurfaceFormat
SDL_CreateRGBSurface

CategoryAPI, CategorySurface


[ edit | delete | history | feedback | raw ]

[ front page | index | search | recent changes | git repo | offline html ]

All wiki content is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0).
Wiki powered by ghwikipp.