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LibGfx/TIFF: Add support for Group4Fax encoded images

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Note that we don't parse the T6 option group yet.

The test case was generated with GIMP.
This commit is contained in:
Lucas CHOLLET 2024-02-15 19:47:44 -05:00 • committed by Jelle Raaijmakers
parent d57d676425
commit 9ec3480207
3 changed files with 26 additions and 0 deletions
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12
Tests/LibGfx/TestImageDecoder.cpp
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@ -654,6 +654,18 @@ TEST_CASE(test_tiff_ccitt3_2d_fill)
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Black);
}
TEST_CASE(test_tiff_ccitt4)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/ccitt4.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Black);
}
TEST_CASE(test_tiff_lzw)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/lzw.tiff"sv)));