Differential D4501 Diff 14126 extern/gltf-draco/draco/src/draco/compression/mesh/mesh_encoder_test.cc

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extern/gltf-draco/draco/src/draco/compression/mesh/mesh_encoder_test.cc

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				// Copyright 2016 The Draco Authors.
				//
				// Licensed under the Apache License, Version 2.0 (the "License");
				// you may not use this file except in compliance with the License.
				// You may obtain a copy of the License at
				//
				// http://www.apache.org/licenses/LICENSE-2.0
				//
				// Unless required by applicable law or agreed to in writing, software
				// distributed under the License is distributed on an "AS IS" BASIS,
				// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
				// See the License for the specific language governing permissions and
				// limitations under the License.
				//
				#include "draco/compression/mesh/mesh_encoder.h"

				#include "draco/compression/expert_encode.h"
				#include "draco/core/decoder_buffer.h"
				#include "draco/core/draco_test_base.h"
				#include "draco/core/draco_test_utils.h"
				#include "draco/io/obj_decoder.h"

				namespace draco {

				class MeshEncoderTest : public ::testing::TestWithParam<const char *> {
				protected:
				MeshEncoderTest() {}

				// Fills out_method with id of the encoding method used for the test.
				// Returns false if the encoding method is not set properly.
				bool GetMethod(MeshEncoderMethod *out_method) const {
				if (strcmp(GetParam(), "sequential") == 0) {
				*out_method = MESH_SEQUENTIAL_ENCODING;
				return true;
				}
				if (strcmp(GetParam(), "edgebreaker") == 0) {
				*out_method = MESH_EDGEBREAKER_ENCODING;
				return true;
				}
				return false;
				}
				};

				TEST_P(MeshEncoderTest, EncodeGoldenMesh) {
				// This test verifies that a given set of meshes are encoded to an expected
				// output. This is useful for catching bugs in code changes that are not
				// supposed to change the encoding.
				// The test is expected to fail when the encoding is modified. In such case,
				// the golden files need to be updated to reflect the changes.
				MeshEncoderMethod method;
				ASSERT_TRUE(GetMethod(&method))
				<< "Test is run for an unknown encoding method";

				const std::string file_name = "test_nm.obj";
				std::string golden_file_name = file_name;
				golden_file_name += '.';
				golden_file_name += GetParam();
				golden_file_name += ".1.2.0.drc";
				const std::unique_ptr<Mesh> mesh(ReadMeshFromTestFile(file_name));
				ASSERT_NE(mesh, nullptr) << "Failed to load test model " << file_name;

				ExpertEncoder encoder(*mesh.get());
				encoder.SetEncodingMethod(method);
				encoder.SetAttributeQuantization(0, 20);
				EncoderBuffer buffer;
				ASSERT_TRUE(encoder.EncodeToBuffer(&buffer).ok())
				<< "Failed encoding test mesh " << file_name << " with method "
				<< GetParam();
				// Check that the encoded mesh was really encoded with the selected method.
				DecoderBuffer decoder_buffer;
				decoder_buffer.Init(buffer.data(), buffer.size());
				decoder_buffer.Advance(8); // Skip the header to the encoding method id.
				uint8_t encoded_method;
				decoder_buffer.Decode(&encoded_method);
				ASSERT_EQ(encoded_method, method);
				if (!FLAGS_update_golden_files) {
				EXPECT_TRUE(
				CompareGoldenFile(golden_file_name, buffer.data(), buffer.size()))
				<< "Encoded data is different from the golden file. Please verify that "
				"the encoding works as expected and update the golden file if "
				"necessary (run the test with --update_golden_files flag).";
				} else {
				// Save the files into the local folder.
				EXPECT_TRUE(
				GenerateGoldenFile(golden_file_name, buffer.data(), buffer.size()))
				<< "Failed to generate new golden file for " << file_name;
				}
				}

				INSTANTIATE_TEST_CASE_P(MeshEncoderTests, MeshEncoderTest,
				::testing::Values("sequential", "edgebreaker"));

				} // namespace draco