Function basis_benchmark_etc1s_opencl

engine/dlib/src/basis/encoder/basisu_comp.cpp:2421–2520

	}

	bool basis_benchmark_etc1s_opencl(bool* pOpenCL_failed)
	{
		if (pOpenCL_failed)
			*pOpenCL_failed = false;

		if (!opencl_is_available())
		{
			error_printf("basis_benchmark_etc1s_opencl: OpenCL support must be enabled first!\n");
			return false;
		}

		const uint32_t W = 1024, H = 1024;
		basisu::vector<image> images;
		image& img = images.enlarge(1)->resize(W, H);
		
		const uint32_t NUM_RAND_LETTERS = 6000;// 40000;

		rand r;
		r.seed(200);

		for (uint32_t i = 0; i < NUM_RAND_LETTERS; i++)
		{
			uint32_t x = r.irand(0, W - 1), y = r.irand(0, H - 1);
			uint32_t sx = r.irand(1, 4), sy = r.irand(1, 4);
			color_rgba c(r.byte(), r.byte(), r.byte(), 255);

			img.debug_text(x, y, sx, sy, c, nullptr, false, "%c", static_cast<char>(r.irand(32, 127)));
		}

		//save_png("test.png", img);

		image_stats stats;

		uint32_t flags_and_quality = cFlagSRGB | cFlagThreaded | 255;
		size_t comp_size = 0;

		double best_cpu_time = 1e+9f, best_gpu_time = 1e+9f;

		const uint32_t TIMES_TO_ENCODE = 2;
		interval_timer tm;

		for (uint32_t i = 0; i < TIMES_TO_ENCODE; i++)
		{
			tm.start();
			void* pComp_data = basis_compress(
				images,
				flags_and_quality, 1.0f,
				&comp_size,
				&stats);
			double cpu_time = tm.get_elapsed_secs();
			if (!pComp_data)
			{
				error_printf("basis_benchmark_etc1s_opencl: basis_compress() failed (CPU)!\n");
				return false;
			}
			
			best_cpu_time = minimum(best_cpu_time, cpu_time);