NAME

SDL_LockTextureToSurface - Lock a portion of the texture for write-only pixel access, and expose it as a SDL surface.

SYNOPSIS

#include <SDL3/SDL_render.h>

bool SDL_LockTextureToSurface(SDL_Texture *texture, const SDL_Rect *rect, SDL_Surface **surface);

DESCRIPTION

Besides providing an SDL_Surface instead of raw pixel data, this function operates like SDL_LockTexture.

As an optimization, the pixels made available for editing don't necessarily contain the old texture data. This is a write-only operation, and if you need to keep a copy of the texture data you should do that at the application level.

You must use SDL_UnlockTexture() to unlock the pixels and apply any changes.

The returned surface is freed internally after calling SDL_UnlockTexture() or SDL_DestroyTexture(). The caller should not free it.

FUNCTION PARAMETERS

texture

the texture to lock for access, which must be created with SDL_TEXTUREACCESS_STREAMING.

rect

a pointer to the rectangle to lock for access. If the rect is NULL, the entire texture will be locked.

surface

a pointer to an SDL surface of size rect. Don't assume any specific pixel content.

RETURN VALUE

Returns true on success or false on failure; call SDL_GetError() for more information.

THREAD SAFETY

This function should only be called on the main thread.

AVAILABILITY

This function is available since SDL 3.2.0.

SEE ALSO

SDL_LockTexture(3), SDL_UnlockTexture(3)