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LibGfx/JBIG2: Reject things in refinement decoding

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These aren't hit for my 1000 page PDF test set.
This commit is contained in:
Nico Weber 2024-03-21 10:30:27 -04:00 • committed by Andreas Kling
commit 0d2e91b4ea
Notes: sideshowbarker 2024-07-17 09:49:33 +09:00
1 changed files with 16 additions and 1 deletions
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17
Userland/Libraries/LibGfx/ImageFormats/JBIG2Loader.cpp
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@ -964,8 +964,23 @@ struct GenericRefinementRegionDecodingInputParameters {
};
// 6.3 Generic Refinement Region Decoding Procedure
static ErrorOr<NonnullOwnPtr<BitBuffer>> generic_refinement_region_decoding_procedure(GenericRefinementRegionDecodingInputParameters&)
static ErrorOr<NonnullOwnPtr<BitBuffer>> generic_refinement_region_decoding_procedure(GenericRefinementRegionDecodingInputParameters& inputs)
{
VERIFY(inputs.gr_template == 0 || inputs.gr_template == 1);
if (inputs.is_typical_prediction_used)
return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode typical prediction in generic refinement regions yet");
if (inputs.gr_template == 0) {
if (inputs.adaptive_template_pixels[0].x != -1 || inputs.adaptive_template_pixels[0].y != -1
|| inputs.adaptive_template_pixels[1].x != -1 || inputs.adaptive_template_pixels[1].y != -1)
return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot handle custom adaptive pixels in refinement regions yet");
}
// GRTEMPLATE 1 never uses adaptive pixels.
if (inputs.gr_template == 1)
return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode GRTEMPLATE 1 yet");
return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode generic refinement regions yet");
}