LadybirdBrowser/ladybird
1
1
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-12-25 20:22:18 +03:00
Code Issues Packages Projects Releases Wiki Activity

LibGfx/CCITT: Add PDF-specific options for CCITT3 1D

Browse Source 
These two options are additions of the PDF specification. They are valid
for both 1D and 2D, but let's bail out if we encounter them in a 2D
image, as we don't have a test case yet.
This commit is contained in:
Lucas CHOLLET 2024-03-18 13:26:30 -04:00 committed by Andreas Kling
parent 6fc59039c4
commit 7730b743db
Notes: sideshowbarker 2024-07-17 06:29:49 +09:00 
Author: https://github.com/LucasChollet
Commit: https://github.com/SerenityOS/serenity/commit/7730b743db
Pull-request: https://github.com/SerenityOS/serenity/pull/23628
Issue: https://github.com/SerenityOS/serenity/issues/23623
Reviewed-by: https://github.com/nico ✅
2 changed files with 22 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Userland/Libraries/LibGfx/ImageFormats/CCITTDecoder.cpp
View File

@ -596,13 +596,19 @@ ErrorOr<ByteBuffer> decode_ccitt_group3(ReadonlyBytes bytes, u32 image_width, u3
// NOTE: For whatever reason, the last EOL doesn't seem to be included
for (u32 i = 0; i < image_height; ++i) {
TRY(read_eol(*bit_stream, options.use_fill_bits));
if (options.require_end_of_line == Group3Options::RequireEndOfLine::Yes)
TRY(read_eol(*bit_stream, options.use_fill_bits));
TRY(decode_single_ccitt3_1d_line(*bit_stream, *decoded_bits, image_width));
if (options.encoded_byte_aligned == Group3Options::EncodedByteAligned::Yes)
bit_stream->align_to_byte_boundary();
}
return decoded_bytes;
}
if (options.require_end_of_line == Group3Options::RequireEndOfLine::No || options.encoded_byte_aligned == Group3Options::EncodedByteAligned::Yes)
return Error::from_string_literal("CCITTDecoder: Unsupported option for CCITT3 2D decoding");
TRY(decode_single_ccitt3_2d_block(*bit_stream, *decoded_bits, image_width, image_height, options.use_fill_bits));
return decoded_bytes;
}

15
Userland/Libraries/LibGfx/ImageFormats/CCITTDecoder.h
View File

@ -43,9 +43,24 @@ struct Group3Options {
Yes = 1,
};
// Addition from the PDF specification
enum class RequireEndOfLine : u8 {
No = 0,
Yes = 1,
};
enum class EncodedByteAligned : u8 {
No = 0,
Yes = 1,
};
Mode dimensions = Mode::OneDimension;
Compression compression = Compression::Compressed;
UseFillBits use_fill_bits = UseFillBits::No;
// Default values are set to be compatible with the CCITT specification
RequireEndOfLine require_end_of_line = RequireEndOfLine::Yes;
EncodedByteAligned encoded_byte_aligned = EncodedByteAligned::No;
};
ErrorOr<ByteBuffer> decode_ccitt_group3(ReadonlyBytes bytes, u32 image_width, u32 image_height, Group3Options const& options);