RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 13:17:35 +00:00
Code Issues Activity Actions

LibGfx/TIFF: Add AdobeDeflate compression support

Browse source 
This new compression is quite popular and uses a basic Zlib compression
to compress strips. Note that this is not part of the original TIFF
specification but in the Technical Notes from 2002:
https://web.archive.org/web/20160305055905/http://partners.adobe.com/public/developer/en/tiff/TIFFphotoshop.pdf

The test case was generated with GIMP.
This commit is contained in:
Lucas CHOLLET 2023-12-23 00:09:26 -05:00 • committed by Tim Schumacher
parent 9c5a75067f
commit 73c8b4865e
4 changed files with 29 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Tests/LibGfx/TestImageDecoder.cpp
View file

@ -462,6 +462,18 @@ TEST_CASE(test_tiff_lzw)
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_defalte)
{
auto file = MUST(Core::MappedFile::map(TEST_INPUT("tiff/deflate.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::Red);
}
TEST_CASE(test_tiff_packed_bits)
{
auto file = MUST(Core::MappedFile::map(TEST_INPUT("tiff/packed_bits.tiff"sv)));