C++ (Cpp) SDL_Renderer::LockTextureの例

コード例 #1

ファイル: SDL_render.c プロジェクト: ryanzhao006/IOSAVDecode

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

    CHECK_TEXTURE_MAGIC(texture, -1);

    if (texture->access != SDL_TEXTUREACCESS_STREAMING) {
        SDL_SetError("SDL_LockTexture(): texture must be streaming");
        return -1;
    }

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

    if (texture->yuv) {
        return SDL_LockTextureYUV(texture, rect, pixels, pitch);
    } else if (texture->native) {
        return SDL_LockTextureNative(texture, rect, pixels, pitch);
    } else {
        renderer = texture->renderer;
        return renderer->LockTexture(renderer, texture, rect, pixels, pitch);
    }
}