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LibGfx/JPEG2000: Read COD on tile headers too

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I haven't seen this in the wild yet, but it is allowed per spec
and easy to do.
This commit is contained in:
Nico Weber 2024-04-20 09:58:22 -04:00 • committed by Tim Flynn
commit 3735f2cbed
Notes: sideshowbarker 2024-07-17 05:02:35 +09:00
1 changed files with 6 additions and 1 deletions
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7
Userland/Libraries/LibGfx/ImageFormats/JPEG2000Loader.cpp
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@ -459,6 +459,7 @@ struct TilePartData {
};
struct TileData {
Optional<CodingStyleDefault> cod;
Optional<QuantizationDefault> qcd;
Vector<QuantizationComponent> qccs;
Vector<TilePartData> tile_parts;
@ -652,7 +653,11 @@ static ErrorOr<void> parse_codestream_tile_header(JPEG2000LoadingContext& contex
case J2K_PLT:
case J2K_COM: {
auto marker = TRY(read_marker_at_cursor(context));
if (marker.marker == J2K_QCD) {
if (marker.marker == J2K_COD) {
if (tile.cod.has_value())
return Error::from_string_literal("JPEG2000ImageDecoderPlugin: Multiple COD markers in tile header");
tile.cod = TRY(read_coding_style_default(marker.data.value()));
} else if (marker.marker == J2K_QCD) {
if (tile.qcd.has_value())
return Error::from_string_literal("JPEG2000ImageDecoderPlugin: Multiple QCD markers in tile header");
tile.qcd = TRY(read_quantization_default(marker.data.value()));