Function SDL_LockTexture

deps/SDL2/src/render/SDL_render.c:1700–1738

}

int
SDL_LockTexture(SDL_Texture * texture, const SDL_Rect * rect,
                void **pixels, int *pitch)
{
    SDL_Rect full_rect;

    CHECK_TEXTURE_MAGIC(texture, -1);

    if (texture->access != SDL_TEXTUREACCESS_STREAMING) {
        return SDL_SetError("SDL_LockTexture(): texture must be streaming");
    }

    if (!rect) {
        full_rect.x = 0;
        full_rect.y = 0;
        full_rect.w = texture->w;
        full_rect.h = texture->h;
        rect = &full_rect;
    }

#if SDL_HAVE_YUV
    if (texture->yuv) {
        if (FlushRenderCommandsIfTextureNeeded(texture) < 0) {
            return -1;
        }
        return SDL_LockTextureYUV(texture, rect, pixels, pitch);
    } else
#endif
    if (texture->native) {
        /* Calls a real SDL_LockTexture/SDL_UnlockTexture on unlock, flushing then. */
        return SDL_LockTextureNative(texture, rect, pixels, pitch);
    } else {
        SDL_Renderer *renderer = texture->renderer;
        if (FlushRenderCommandsIfTextureNeeded(texture) < 0) {
            return -1;
        }
        return renderer->LockTexture(renderer, texture, rect, pixels, pitch);
    }
}

int
SDL_LockTextureToSurface(SDL_Texture *texture, const SDL_Rect *rect,