blending_test.cc - mozsearch

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// Copyright (c) the JPEG XL Project Authors. All rights reserved.

//

// Use of this source code is governed by a BSD-style

// license that can be found in the LICENSE file.

#include <jxl/types.h>

#include <cstdint>

#include <sstream>

#include <utility>

#include <vector>

#include "lib/extras/dec/decode.h"

#include "lib/extras/dec/jxl.h"

#include "lib/extras/packed_image.h"

#include "lib/jxl/base/span.h"

#include "lib/jxl/test_utils.h"

#include "lib/jxl/testing.h"

namespace jxl {

namespace {

TEST(BlendingTest, Crops) {

  const std::vector<uint8_t> compressed =

      jxl::test::ReadTestData("jxl/blending/cropped_traffic_light.jxl");

  extras::JXLDecompressParams dparams;

  dparams.accepted_formats = {{3, JXL_TYPE_UINT8, JXL_LITTLE_ENDIAN, 0}};

  extras::PackedPixelFile decoded;

  ASSERT_TRUE(DecodeImageJXL(compressed.data(), compressed.size(), dparams,

                             /*decoded_bytes=*/nullptr, &decoded));

  ASSERT_EQ(decoded.frames.size(), 4);

  int i = 0;

  for (auto&& decoded_frame : decoded.frames) {

    std::ostringstream filename;

    filename << "jxl/blending/cropped_traffic_light_frame-" << i << ".png";

    const std::vector<uint8_t> compressed_frame =

        jxl::test::ReadTestData(filename.str());

    extras::PackedPixelFile decoded_frame_ppf;

    decoded_frame_ppf.info = decoded.info;

    decoded_frame_ppf.primary_color_representation =

        decoded.primary_color_representation;

    decoded_frame_ppf.color_encoding = decoded.color_encoding;

    decoded_frame_ppf.icc = decoded.icc;

    decoded_frame_ppf.extra_channels_info = decoded.extra_channels_info;

    decoded_frame_ppf.frames.emplace_back(std::move(decoded_frame));

    extras::PackedPixelFile expected_frame_ppf;

    ASSERT_TRUE(extras::DecodeBytes(Bytes(compressed_frame),

                                    extras::ColorHints(), &expected_frame_ppf));

    EXPECT_EQ(0.0f,

              test::ComputeDistance2(decoded_frame_ppf, expected_frame_ppf));

    ++i;

}  // namespace

}  // namespace jxl