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LibGfx/JBIG2: Scan for the first PageInformation segment and decode it

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This allows `file` to correctly print the dimensions of a .jbig2 file,
and it allows us to write a test that covers much of all the code
written so far.
This commit is contained in:
Nico Weber 2024-03-05 20:42:28 -05:00 • committed by Andreas Kling
parent 1eaaa8c3e9
commit 8f4930f2df
2 changed files with 45 additions and 0 deletions
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9
Tests/LibGfx/TestImageDecoder.cpp
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@ -13,6 +13,7 @@
#include <LibGfx/ImageFormats/ICOLoader.h>
#include <LibGfx/ImageFormats/ILBMLoader.h>
#include <LibGfx/ImageFormats/ImageDecoder.h>
#include <LibGfx/ImageFormats/JBIG2Loader.h>
#include <LibGfx/ImageFormats/JPEGLoader.h>
#include <LibGfx/ImageFormats/JPEGXLLoader.h>
#include <LibGfx/ImageFormats/PAMLoader.h>
@ -316,6 +317,14 @@ TEST_CASE(test_ilbm_malformed_frame)
}
}
TEST_CASE(test_jbig2_size)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("jbig2/bitmap.jbig2"sv)));
EXPECT(Gfx::JBIG2ImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::JBIG2ImageDecoderPlugin::create(file->bytes()));
EXPECT_EQ(plugin_decoder->size(), Gfx::IntSize(399, 400));
}
TEST_CASE(test_jpeg_sof0_one_scan)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("jpg/rgb24.jpg"sv)));