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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_SUITE_P(MeshEncoderTests, MeshEncoderTest,
::testing::Values("sequential", "edgebreaker"));
} // namespace draco
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