internal GifModel(QuadShader quad, UploadBuffer upload) { shader = new GifShader(quad, upload); }
internal GifModel(QuadShader quad, UploadBuffer upload, ProgressModel progressModel) { this.progressModel = progressModel; shader = new GifShader(quad, upload); }
internal GifModel(ProgressModel progressModel) { this.progressModel = progressModel; shader = new GifShader(); }