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LibGfx/PNG: Read the cICP chunk
This commit is contained in:
Lucas CHOLLET
Tim Flynn
parent
cffc8678d8
commit
a144481e6c
Notes:
github-actions[bot]
2025-02-12 17:26:09 +00:00
Author: https://github.com/LucasChollet
Commit: a144481e6c
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3502
Reviewed-by: https://github.com/trflynn89
10 changed files with 94 additions and 6 deletions
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@ -30,6 +30,7 @@ struct PNGLoadingContext {
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u32 frame_count { 0 };
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u32 frame_count { 0 };
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u32 loop_count { 0 };
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u32 loop_count { 0 };
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Vector<ImageFrameDescriptor> frame_descriptors;
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Vector<ImageFrameDescriptor> frame_descriptors;
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Optional<Media::CodingIndependentCodePoints> cicp;
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Optional<ByteBuffer> icc_profile;
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Optional<ByteBuffer> icc_profile;
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OwnPtr<ExifMetadata> exif_metadata;
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OwnPtr<ExifMetadata> exif_metadata;
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@ -111,6 +112,11 @@ ErrorOr<ImageFrameDescriptor> PNGImageDecoderPlugin::frame(size_t index, Optiona
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return m_context->frame_descriptors[index];
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return m_context->frame_descriptors[index];
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}
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}
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ErrorOr<Optional<Media::CodingIndependentCodePoints>> PNGImageDecoderPlugin::cicp()
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{
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return m_context->cicp;
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}
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ErrorOr<Optional<ReadonlyBytes>> PNGImageDecoderPlugin::icc_data()
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ErrorOr<Optional<ReadonlyBytes>> PNGImageDecoderPlugin::icc_data()
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{
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{
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if (m_context->icc_profile.has_value())
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if (m_context->icc_profile.has_value())
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@ -187,12 +193,24 @@ ErrorOr<void> PNGImageDecoderPlugin::initialize()
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png_set_filler(m_context->png_ptr, 0xFF, PNG_FILLER_AFTER);
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png_set_filler(m_context->png_ptr, 0xFF, PNG_FILLER_AFTER);
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png_set_bgr(m_context->png_ptr);
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png_set_bgr(m_context->png_ptr);
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png_byte color_primaries { 0 };
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png_byte transfer_function { 0 };
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png_byte matrix_coefficients { 0 };
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png_byte video_full_range_flag { 0 };
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if (png_get_cICP(m_context->png_ptr, m_context->info_ptr, &color_primaries, &transfer_function, &matrix_coefficients, &video_full_range_flag)) {
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Media::ColorPrimaries cp { color_primaries };
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Media::TransferCharacteristics tc { transfer_function };
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Media::MatrixCoefficients mc { matrix_coefficients };
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Media::VideoFullRangeFlag rf { video_full_range_flag };
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m_context->cicp = Media::CodingIndependentCodePoints { cp, tc, mc, rf };
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} else {
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char* profile_name = nullptr;
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char* profile_name = nullptr;
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int compression_type = 0;
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int compression_type = 0;
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u8* profile_data = nullptr;
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u8* profile_data = nullptr;
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u32 profile_len = 0;
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u32 profile_len = 0;
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if (png_get_iCCP(m_context->png_ptr, m_context->info_ptr, &profile_name, &compression_type, &profile_data, &profile_len))
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if (png_get_iCCP(m_context->png_ptr, m_context->info_ptr, &profile_name, &compression_type, &profile_data, &profile_len))
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m_context->icc_profile = TRY(ByteBuffer::copy(profile_data, profile_len));
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m_context->icc_profile = TRY(ByteBuffer::copy(profile_data, profile_len));
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}
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u8* exif_data = nullptr;
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u8* exif_data = nullptr;
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u32 exif_length = 0;
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u32 exif_length = 0;
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@ -27,6 +27,7 @@ public:
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virtual size_t first_animated_frame_index() override;
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virtual size_t first_animated_frame_index() override;
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virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) override;
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virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) override;
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virtual Optional<Metadata const&> metadata() override;
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virtual Optional<Metadata const&> metadata() override;
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virtual ErrorOr<Optional<Media::CodingIndependentCodePoints>> cicp() override;
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virtual ErrorOr<Optional<ReadonlyBytes>> icc_data() override;
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virtual ErrorOr<Optional<ReadonlyBytes>> icc_data() override;
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private:
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private:
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@ -0,0 +1,8 @@
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<!DOCTYPE html>
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<meta charset="utf-8">
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<title>PNG Third Edition: animated PNG</title>
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<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
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<body>
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<p>Test passes if you see a lime green rectangle, and no red.</p>
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<div class="test"><img src="support/lime.png" alt=""></div>
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</body>
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BIN
Tests/LibWeb/Ref/expected/wpt-import/png/apng/support/lime.png
Normal file
BIN
Tests/LibWeb/Ref/expected/wpt-import/png/apng/support/lime.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 179 B |
17
Tests/LibWeb/Ref/expected/wpt-import/png/cICP-wins-ref.html
Normal file
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Tests/LibWeb/Ref/expected/wpt-import/png/cICP-wins-ref.html
Normal file
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@ -0,0 +1,17 @@
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<!DOCTYPE html>
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<html>
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<meta charset="utf-8">
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<title>PNG Third Edition: Coding Independent Code Points</title>
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<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
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<style>
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.test {
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width: 128px;
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height: 64px;
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background-color: green;
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}
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</style>
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<body>
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<p>Test passes if you see a green rectangle, and no red.</p>
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<div class="test"><img src="support/srgb_green.png" alt=""></div>
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</body>
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</html>
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BIN
Tests/LibWeb/Ref/expected/wpt-import/png/support/srgb_green.png
Normal file
BIN
Tests/LibWeb/Ref/expected/wpt-import/png/support/srgb_green.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 192 B |
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@ -0,0 +1,22 @@
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<!DOCTYPE html>
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<html class="reftest-wait">
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<meta charset="utf-8">
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<title>PNG Third Edition: animated PNG, fdAT inherits colorspace from cICP</title>
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<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
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<link rel="help" href="https://www.w3.org/TR/png-3/#apng-frame-based-animation">
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<link rel="help" href="https://www.w3.org/TR/png-3/#structure">
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<link rel="help" href="https://www.w3.org/TR/png-3/#fdAT-chunk">
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<link rel="help" href="https://www.w3.org/TR/png-3/#cICP-chunk">
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<link rel="match" href="../../../../expected/wpt-import/png/apng/apng-lime-rectangle-ref.html">
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<meta name="assert" content="Each frame inherits every property specified by any critical or ancillary chunks before the first IDAT chunk in the file">
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<script>
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const el = document.querySelector(".reftest-wait");
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setTimeout(() => {
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el.classList.remove('reftest-wait');
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}, 2100);
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</script>
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<body>
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<p>Test passes if you see a lime green rectangle, and no red.</p>
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<!-- sRGB lime = color(display-p3 0.4584 0.9853 0.2983) -->
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<div class="test"><img src="support/062.png" alt=""></div>
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</body>
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BIN
Tests/LibWeb/Ref/input/wpt-import/png/apng/support/062.png
Normal file
BIN
Tests/LibWeb/Ref/input/wpt-import/png/apng/support/062.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 445 B |
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Tests/LibWeb/Ref/input/wpt-import/png/cICP-wins.html
Normal file
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Tests/LibWeb/Ref/input/wpt-import/png/cICP-wins.html
Normal file
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@ -0,0 +1,22 @@
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<!DOCTYPE html>
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<html>
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<meta charset="utf-8">
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<title>PNG Third Edition: Coding Independent Code Points</title>
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<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
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<link rel="help" href="https://www.w3.org/TR/png-3/#11iCCP">
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<link rel="help" href="https://www.w3.org/TR/png-3/#cICP-chunk">
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<link rel="match" href="../../../expected/wpt-import/png/cICP-wins-ref.html">
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<meta name="assert" content="When the cICP chunk is present, decoders that recognize it SHALL ignore iCCP">
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<style>
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.test {
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width: 128px;
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height: 64px;
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background-color: red;
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}
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</style>
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<body>
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<p>Test passes if you see a green rectangle, and no red.</p>
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<div class="test"><img src="support/cICP-and-iCCP.png" alt=""></div>
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</body>
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</html>
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BIN
Tests/LibWeb/Ref/input/wpt-import/png/support/cICP-and-iCCP.png
Normal file
BIN
Tests/LibWeb/Ref/input/wpt-import/png/support/cICP-and-iCCP.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 2.7 KiB |
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