Method validate_output

engine/dlib/src/basis/encoder/basisu_frontend.cpp:3358–3414

This is very slow and only intended for debugging/development. It's enabled using the "-validate_etc1s" command line option.

	// This is very slow and only intended for debugging/development. It's enabled using the "-validate_etc1s" command line option.
	bool basisu_frontend::validate_output() const
	{
		debug_printf("validate_output\n");

		if (!check_etc1s_constraints())
			return false;

		for (uint32_t block_index = 0; block_index < m_total_blocks; block_index++)
		{
//#define CHECK(x) do { if (!(x)) { DebugBreak(); return false; } } while(0)
#define CHECK(x) BASISU_FRONTEND_VERIFY(x);

			CHECK(get_output_block(block_index).get_flip_bit() == true);
			
			const bool diff_flag = get_diff_flag(block_index);
			CHECK(diff_flag == true);

			etc_block blk;
			memset(&blk, 0, sizeof(blk));
			blk.set_flip_bit(true);
			blk.set_diff_bit(true);

			const uint32_t endpoint_cluster0_index = get_subblock_endpoint_cluster_index(block_index, 0);
			const uint32_t endpoint_cluster1_index = get_subblock_endpoint_cluster_index(block_index, 1);

			// basisu only supports ETC1S, so these must be equal.
			CHECK(endpoint_cluster0_index == endpoint_cluster1_index);
			
			CHECK(blk.set_block_color5_check(get_endpoint_cluster_unscaled_color(endpoint_cluster0_index, false), get_endpoint_cluster_unscaled_color(endpoint_cluster1_index, false)));

			CHECK(get_endpoint_cluster_color_is_used(endpoint_cluster0_index, false));
			
			blk.set_inten_table(0, get_endpoint_cluster_inten_table(endpoint_cluster0_index, false));
			blk.set_inten_table(1, get_endpoint_cluster_inten_table(endpoint_cluster1_index, false));

			const uint32_t selector_cluster_index = get_block_selector_cluster_index(block_index);
			CHECK(selector_cluster_index < get_total_selector_clusters());

			CHECK(vector_find(get_selector_cluster_block_indices(selector_cluster_index), block_index) != -1);

			blk.set_raw_selector_bits(get_selector_cluster_selector_bits(selector_cluster_index).get_raw_selector_bits());

			const etc_block &rdo_output_block = get_output_block(block_index);

			CHECK(rdo_output_block.get_flip_bit() == blk.get_flip_bit());
			CHECK(rdo_output_block.get_diff_bit() == blk.get_diff_bit());
			CHECK(rdo_output_block.get_inten_table(0) == blk.get_inten_table(0));
			CHECK(rdo_output_block.get_inten_table(1) == blk.get_inten_table(1));
			CHECK(rdo_output_block.get_base5_color() == blk.get_base5_color());
			CHECK(rdo_output_block.get_delta3_color() == blk.get_delta3_color());
			CHECK(rdo_output_block.get_raw_selector_bits() == blk.get_raw_selector_bits());
						
#undef CHECK
		}

		return true;
	}