preview_test.cc (2460B)
1 // Copyright (c) the JPEG XL Project Authors. All rights reserved. 2 // 3 // Use of this source code is governed by a BSD-style 4 // license that can be found in the LICENSE file. 5 6 #include <jxl/cms.h> 7 #include <jxl/memory_manager.h> 8 9 #include <cstddef> 10 #include <cstdint> 11 #include <string> 12 #include <vector> 13 14 #include "lib/extras/codec.h" 15 #include "lib/jxl/base/span.h" 16 #include "lib/jxl/codec_in_out.h" 17 #include "lib/jxl/common.h" 18 #include "lib/jxl/enc_params.h" 19 #include "lib/jxl/headers.h" 20 #include "lib/jxl/image_bundle.h" 21 #include "lib/jxl/test_memory_manager.h" 22 #include "lib/jxl/test_utils.h" 23 #include "lib/jxl/testing.h" 24 25 namespace jxl { 26 namespace { 27 using ::jxl::test::ButteraugliDistance; 28 using ::jxl::test::ReadTestData; 29 using ::jxl::test::Roundtrip; 30 31 TEST(PreviewTest, RoundtripGivenPreview) { 32 JxlMemoryManager* memory_manager = jxl::test::MemoryManager(); 33 const std::vector<uint8_t> orig = 34 ReadTestData("external/wesaturate/500px/u76c0g_bliznaca_srgb8.png"); 35 CodecInOut io{memory_manager}; 36 ASSERT_TRUE(SetFromBytes(Bytes(orig), &io)); 37 ASSERT_TRUE(io.ShrinkTo(io.xsize() / 8, io.ysize() / 8)); 38 // Same as main image 39 JXL_TEST_ASSIGN_OR_DIE(io.preview_frame, io.Main().Copy()); 40 const size_t preview_xsize = 15; 41 const size_t preview_ysize = 27; 42 ASSERT_TRUE(io.preview_frame.ShrinkTo(preview_xsize, preview_ysize)); 43 io.metadata.m.have_preview = true; 44 ASSERT_TRUE(io.metadata.m.preview_size.Set(io.preview_frame.xsize(), 45 io.preview_frame.ysize())); 46 47 CompressParams cparams; 48 cparams.butteraugli_distance = 2.0; 49 cparams.speed_tier = SpeedTier::kSquirrel; 50 cparams.SetCms(*JxlGetDefaultCms()); 51 52 CodecInOut io2{memory_manager}; 53 JXL_EXPECT_OK(Roundtrip(&io, cparams, {}, &io2, _)); 54 EXPECT_EQ(preview_xsize, io2.metadata.m.preview_size.xsize()); 55 EXPECT_EQ(preview_ysize, io2.metadata.m.preview_size.ysize()); 56 EXPECT_EQ(preview_xsize, io2.preview_frame.xsize()); 57 EXPECT_EQ(preview_ysize, io2.preview_frame.ysize()); 58 59 EXPECT_LE(ButteraugliDistance(io.preview_frame, io2.preview_frame, 60 ButteraugliParams(), *JxlGetDefaultCms(), 61 /*distmap=*/nullptr), 62 2.5); 63 EXPECT_LE(ButteraugliDistance(io.Main(), io2.Main(), ButteraugliParams(), 64 *JxlGetDefaultCms(), 65 /*distmap=*/nullptr), 66 2.5); 67 } 68 69 } // namespace 70 } // namespace jxl