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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 <stddef.h>
#include <string>
#include "gtest/gtest.h"
#include "lib/extras/codec.h"
#include "lib/jxl/aux_out.h"
#include "lib/jxl/base/compiler_specific.h"
#include "lib/jxl/base/data_parallel.h"
#include "lib/jxl/base/override.h"
#include "lib/jxl/base/padded_bytes.h"
#include "lib/jxl/codec_in_out.h"
#include "lib/jxl/color_encoding_internal.h"
#include "lib/jxl/enc_butteraugli_comparator.h"
#include "lib/jxl/enc_cache.h"
#include "lib/jxl/enc_file.h"
#include "lib/jxl/enc_params.h"
#include "lib/jxl/headers.h"
#include "lib/jxl/image_bundle.h"
#include "lib/jxl/test_utils.h"
#include "lib/jxl/testdata.h"
namespace jxl {
namespace {
using test::Roundtrip;
TEST(PreviewTest, RoundtripGivenPreview) {
ThreadPool* pool = nullptr;
const PaddedBytes orig =
ReadTestData("external/wesaturate/500px/u76c0g_bliznaca_srgb8.png");
CodecInOut io;
ASSERT_TRUE(SetFromBytes(Span<const uint8_t>(orig), &io, pool));
io.ShrinkTo(io.xsize() / 8, io.ysize() / 8);
// Same as main image
io.preview_frame = io.Main().Copy();
const size_t preview_xsize = 15;
const size_t preview_ysize = 27;
io.preview_frame.ShrinkTo(preview_xsize, preview_ysize);
io.metadata.m.have_preview = true;
ASSERT_TRUE(io.metadata.m.preview_size.Set(io.preview_frame.xsize(),
io.preview_frame.ysize()));
CompressParams cparams;
cparams.butteraugli_distance = 2.0;
cparams.speed_tier = SpeedTier::kSquirrel;
CodecInOut io2;
Roundtrip(&io, cparams, {}, pool, &io2);
EXPECT_EQ(preview_xsize, io2.metadata.m.preview_size.xsize());
EXPECT_EQ(preview_ysize, io2.metadata.m.preview_size.ysize());
EXPECT_EQ(preview_xsize, io2.preview_frame.xsize());
EXPECT_EQ(preview_ysize, io2.preview_frame.ysize());
EXPECT_LE(ButteraugliDistance(io.preview_frame, io2.preview_frame,
cparams.ba_params, GetJxlCms(),
/*distmap=*/nullptr, pool),
2.5);
EXPECT_LE(
ButteraugliDistance(io.Main(), io2.Main(), cparams.ba_params, GetJxlCms(),
/*distmap=*/nullptr, pool),
2.5);
}
} // namespace
} // namespace jxl
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