LibGfx/JBIG2: Add scaffolding for interpreting segment data
This commit is contained in:
Nico Weber
Tim Flynn
parent
af20ebe4a0
commit
2caf603836
Notes:
sideshowbarker
2024-07-17 03:35:16 +09:00
Author: https://github.com/nico Commit: https://github.com/SerenityOS/serenity/commit/2caf603836 Pull-request: https://github.com/SerenityOS/serenity/pull/23534 Reviewed-by: https://github.com/LucasChollet
1 changed files with 200 additions and 0 deletions
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@ -75,6 +75,7 @@ struct JBIG2LoadingContext {
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enum class State {
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NotDecoded = 0,
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Error,
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Decoded,
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};
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State state { State::NotDecoded };
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@ -302,6 +303,195 @@ static ErrorOr<void> scan_for_page_size(JBIG2LoadingContext& context)
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: No page information segment found for page 1");
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}
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static ErrorOr<void> decode_symbol_dictionary(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode symbol dictionary yet");
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}
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static ErrorOr<void> decode_intermediate_text_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode intermediate text region yet");
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}
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static ErrorOr<void> decode_immediate_text_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode immediate text region yet");
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}
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static ErrorOr<void> decode_immediate_lossless_text_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode immediate lossless text region yet");
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}
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static ErrorOr<void> decode_pattern_dictionary(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode pattern dictionary yet");
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}
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static ErrorOr<void> decode_intermediate_halftone_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode intermediate halftone region yet");
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}
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static ErrorOr<void> decode_immediate_halftone_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode immediate halftone region yet");
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}
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static ErrorOr<void> decode_immediate_lossless_halftone_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode immediate lossless halftone region yet");
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}
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static ErrorOr<void> decode_intermediate_generic_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode intermediate generic region yet");
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}
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static ErrorOr<void> decode_immediate_generic_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode immediate generic region yet");
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}
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static ErrorOr<void> decode_immediate_lossless_generic_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode immediate lossless generic region yet");
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}
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static ErrorOr<void> decode_intermediate_generic_refinement_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode intermediate generic refinement region yet");
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}
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static ErrorOr<void> decode_immediate_generic_refinement_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode immediate generic refinement region yet");
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}
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static ErrorOr<void> decode_immediate_lossless_generic_refinement_region(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode immediate lossless generic refinement region yet");
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}
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static ErrorOr<void> decode_page_information(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode page information yet");
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}
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static ErrorOr<void> decode_end_of_page(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode end of page yet");
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}
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static ErrorOr<void> decode_end_of_stripe(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode end of stripe yet");
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}
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static ErrorOr<void> decode_end_of_file(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode end of file yet");
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}
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static ErrorOr<void> decode_profiles(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode profiles yet");
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}
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static ErrorOr<void> decode_tables(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode tables yet");
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}
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static ErrorOr<void> decode_color_palette(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode color palette yet");
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}
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static ErrorOr<void> decode_extension(JBIG2LoadingContext&, SegmentData const&)
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{
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode extension yet");
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}
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static ErrorOr<void> decode_data(JBIG2LoadingContext& context)
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{
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for (auto const& segment : context.segments) {
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if (segment.header.page_association != 0 && segment.header.page_association != 1)
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continue;
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switch (segment.header.type) {
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case SegmentType::SymbolDictionary:
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TRY(decode_symbol_dictionary(context, segment));
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break;
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case SegmentType::IntermediateTextRegion:
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TRY(decode_intermediate_text_region(context, segment));
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break;
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case SegmentType::ImmediateTextRegion:
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TRY(decode_immediate_text_region(context, segment));
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break;
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case SegmentType::ImmediateLosslessTextRegion:
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TRY(decode_immediate_lossless_text_region(context, segment));
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break;
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case SegmentType::PatternDictionary:
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TRY(decode_pattern_dictionary(context, segment));
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break;
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case SegmentType::IntermediateHalftoneRegion:
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TRY(decode_intermediate_halftone_region(context, segment));
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break;
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case SegmentType::ImmediateHalftoneRegion:
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TRY(decode_immediate_halftone_region(context, segment));
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break;
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case SegmentType::ImmediateLosslessHalftoneRegion:
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TRY(decode_immediate_lossless_halftone_region(context, segment));
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break;
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case SegmentType::IntermediateGenericRegion:
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TRY(decode_intermediate_generic_region(context, segment));
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break;
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case SegmentType::ImmediateGenericRegion:
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TRY(decode_immediate_generic_region(context, segment));
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break;
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case SegmentType::ImmediateLosslessGenericRegion:
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TRY(decode_immediate_lossless_generic_region(context, segment));
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break;
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case SegmentType::IntermediateGenericRefinementRegion:
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TRY(decode_intermediate_generic_refinement_region(context, segment));
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break;
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case SegmentType::ImmediateGenericRefinementRegion:
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TRY(decode_immediate_generic_refinement_region(context, segment));
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break;
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case SegmentType::ImmediateLosslessGenericRefinementRegion:
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TRY(decode_immediate_lossless_generic_refinement_region(context, segment));
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break;
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case SegmentType::PageInformation:
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TRY(decode_page_information(context, segment));
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break;
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case SegmentType::EndOfPage:
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TRY(decode_end_of_page(context, segment));
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break;
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case SegmentType::EndOfStripe:
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TRY(decode_end_of_stripe(context, segment));
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break;
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case SegmentType::EndOfFile:
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TRY(decode_end_of_file(context, segment));
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break;
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case SegmentType::Profiles:
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TRY(decode_profiles(context, segment));
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break;
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case SegmentType::Tables:
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TRY(decode_tables(context, segment));
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break;
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case SegmentType::ColorPalette:
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TRY(decode_color_palette(context, segment));
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break;
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case SegmentType::Extension:
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TRY(decode_extension(context, segment));
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break;
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}
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}
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return {};
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}
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JBIG2ImageDecoderPlugin::JBIG2ImageDecoderPlugin()
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{
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m_context = make<JBIG2LoadingContext>();
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@ -339,6 +529,15 @@ ErrorOr<ImageFrameDescriptor> JBIG2ImageDecoderPlugin::frame(size_t index, Optio
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if (m_context->state == JBIG2LoadingContext::State::Error)
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Decoding failed");
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if (m_context->state < JBIG2LoadingContext::State::Decoded) {
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auto result = decode_data(*m_context);
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if (result.is_error()) {
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m_context->state = JBIG2LoadingContext::State::Error;
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return result.release_error();
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}
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m_context->state = JBIG2LoadingContext::State::Decoded;
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}
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Draw the rest of the owl");
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}
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@ -351,6 +550,7 @@ ErrorOr<ByteBuffer> JBIG2ImageDecoderPlugin::decode_embedded(Vector<ReadonlyByte
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TRY(decode_segment_headers(*plugin->m_context, segment_data));
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TRY(scan_for_page_size(*plugin->m_context));
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TRY(decode_data(*plugin->m_context));
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot decode embedded JBIG2 yet");
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}
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