SDL_UpdateTexture
Use this function to update the given texture rectangle with new pixel data.
Contents
Syntax
int SDL_UpdateTexture(SDL_Texture* texture,
const SDL_Rect* rect,
const void* pixels,
int pitch)
Function Parameters
texture |
the texture to update |
rect |
an SDL_Rect structure representing the area to update, or NULL to update the entire texture |
pixels |
the raw pixel data in the format of the texture |
pitch |
the number of bytes in a row of pixel data, including padding between lines |
Return Value
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Code Examples
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Remarks
The pixel data must be in the pixel format of the texture. Use SDL_QueryTexture() to query the pixel format of the texture.
This is a fairly slow function, intended for use with static textures that do not change often.
If the texture is intended to be updated often, it is preferred to create the texture as streaming and use the locking functions referenced below. While this function will work with streaming textures, for optimization reasons you may not get the pixels back if you lock the texture afterward.
