Function SDL_UpdateTexture

deps/SDL2/src/render/SDL_render.c:1518–1556

}

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

    CHECK_TEXTURE_MAGIC(texture, -1);

    if (!pixels) {
        return SDL_InvalidParamError("pixels");
    }
    if (!pitch) {
        return SDL_InvalidParamError("pitch");
    }

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

    if ((rect->w == 0) || (rect->h == 0)) {
        return 0;  /* nothing to do. */
#if SDL_HAVE_YUV
    } else if (texture->yuv) {
        return SDL_UpdateTextureYUV(texture, rect, pixels, pitch);
#endif
    } else if (texture->native) {
        return SDL_UpdateTextureNative(texture, rect, pixels, pitch);
    } else {
        SDL_Renderer *renderer = texture->renderer;
        if (FlushRenderCommandsIfTextureNeeded(texture) < 0) {
            return -1;
        }
        return renderer->UpdateTexture(renderer, texture, rect, pixels, pitch);
    }
}

#if SDL_HAVE_YUV
static int