NAME¶

SDL_LockSurface - Set up a surface for directly accessing the pixels.

SYNOPSIS¶

#include "SDL3/SDL.h"

int SDL_LockSurface(SDL_Surface *surface);

DESCRIPTION¶

Between calls to SDL_LockSurface () /

SDL_UnlockSurface (), you can write to and read from surface->pixels , using the pixel format stored in surface->format . Once you are done accessing the surface, you should use

SDL_UnlockSurface () to release it.

Not all surfaces require locking. If SDL_MUSTLOCK(surface) evaluates to 0, then you can read and write to the surface at any time, and the pixel format of the surface will not change.

FUNCTION PARAMETERS¶

surface

the SDL_Surface
structure to be locked

RETURN VALUE¶

Returns 0 on success or a negative error code on failure; call

SDL_GetError () for more information.

AVAILABILITY¶

This function is available since SDL 3.0.0.

SEE ALSO¶

SDL_MUSTLOCK(3), SDL_UnlockSurface(3)