Function SDL_CreateTexture

deps/SDL2/src/render/SDL_render.c:1042–1139

}

SDL_Texture *
SDL_CreateTexture(SDL_Renderer * renderer, Uint32 format, int access, int w, int h)
{
    SDL_Texture *texture;

    CHECK_RENDERER_MAGIC(renderer, NULL);

    if (!format) {
        format = renderer->info.texture_formats[0];
    }
    if (SDL_BYTESPERPIXEL(format) == 0) {
        SDL_SetError("Invalid texture format");
        return NULL;
    }
    if (SDL_ISPIXELFORMAT_INDEXED(format)) {
        SDL_SetError("Palettized textures are not supported");
        return NULL;
    }
    if (w <= 0 || h <= 0) {
        SDL_SetError("Texture dimensions can't be 0");
        return NULL;
    }
    if ((renderer->info.max_texture_width && w > renderer->info.max_texture_width) ||
        (renderer->info.max_texture_height && h > renderer->info.max_texture_height)) {
        SDL_SetError("Texture dimensions are limited to %dx%d", renderer->info.max_texture_width, renderer->info.max_texture_height);
        return NULL;
    }
    texture = (SDL_Texture *) SDL_calloc(1, sizeof(*texture));
    if (!texture) {
        SDL_OutOfMemory();
        return NULL;
    }
    texture->magic = &texture_magic;
    texture->format = format;
    texture->access = access;
    texture->w = w;
    texture->h = h;
    texture->r = 255;
    texture->g = 255;
    texture->b = 255;
    texture->a = 255;
    texture->scaleMode = SDL_GetScaleMode();
    texture->renderer = renderer;
    texture->next = renderer->textures;
    if (renderer->textures) {
        renderer->textures->prev = texture;
    }
    renderer->textures = texture;

    if (IsSupportedFormat(renderer, format)) {
        if (renderer->CreateTexture(renderer, texture) < 0) {
            SDL_DestroyTexture(texture);
            return NULL;
        }
    } else {
        texture->native = SDL_CreateTexture(renderer,
                                GetClosestSupportedFormat(renderer, format),
                                access, w, h);