Function opencl_init

encoder/basisu_opencl.cpp:730–780

	ocl g_ocl;

	bool opencl_init(bool force_serialization)
	{
		if (g_ocl.is_initialized())
		{
			assert(0);
			return false;
		}

		if (!g_ocl.init(force_serialization))
		{
			ocl_error_printf("opencl_init: Failed initializing OpenCL\n");
			return false;
		}

		const char* pKernel_src = nullptr;
		size_t kernel_src_size = 0;
		uint8_vec kernel_src;

#if BASISU_USE_OCL_KERNELS_HEADER
		pKernel_src = reinterpret_cast<const char*>(ocl_kernels_cl);
		kernel_src_size = ocl_kernels_cl_len;
#else
		if (!read_file_to_vec(BASISU_OCL_KERNELS_FILENAME, kernel_src))
		{
			ocl_error_printf("opencl_init: Cannot read OpenCL kernel source file \"%s\"\n", BASISU_OCL_KERNELS_FILENAME);
			g_ocl.deinit();
			return false;
		}

		pKernel_src = (char*)kernel_src.data();
		kernel_src_size = kernel_src.size();
#endif

		if (!kernel_src_size)
		{
			ocl_error_printf("opencl_init: Invalid OpenCL kernel source file \"%s\"\n", BASISU_OCL_KERNELS_FILENAME);
			g_ocl.deinit();
			return false;
		}

		if (!g_ocl.init_program(pKernel_src, kernel_src_size))
		{
			ocl_error_printf("opencl_init: Failed compiling OpenCL program\n");
			g_ocl.deinit();
			return false;
		}

		printf("OpenCL support initialized successfully\n");

		return true;
	}

	void opencl_deinit()
	{