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LibGfx/ILBMLoader: Add support for PC DeluxePaint files

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This commit is contained in:
Nicolas Ramz 2023-12-08 13:50:53 +01:00 • committed by Sam Atkins
parent b108d51c5b
commit cd6c7f3fc4
6 changed files with 35 additions and 5 deletions
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24
Userland/Libraries/LibGfx/ImageFormats/ILBMLoader.cpp
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@ -46,6 +46,13 @@ enum class ViewportMode : u32 {
HAM = 0x800
};
enum class Format : u8 {
// Amiga interleaved format
ILBM = 0,
// PC-DeluxePaint chunky format
PBM = 1
};
AK_ENUM_BITWISE_OPERATORS(ViewportMode);
struct ChunkHeader {
@ -96,6 +103,8 @@ struct ILBMLoadingContext {
RefPtr<Gfx::Bitmap> bitmap;
BMHDHeader bm_header;
Format format;
};
static ErrorOr<void> decode_iff_ilbm_header(ILBMLoadingContext& context)
@ -107,9 +116,12 @@ static ErrorOr<void> decode_iff_ilbm_header(ILBMLoadingContext& context)
return Error::from_string_literal("Missing IFF header");
auto& header = *bit_cast<IFFHeader const*>(context.data.data());
if (header.form != FourCC("FORM") || header.format != FourCC("ILBM"))
if (header.form != FourCC("FORM") || (header.format != FourCC("ILBM") && header.format != FourCC("PBM ")))
return Error::from_string_literal("Invalid IFF-ILBM header");
context.format = header.format == FourCC("ILBM") ? Format::ILBM : Format::PBM;
return {};
}
@ -292,9 +304,15 @@ static ErrorOr<void> decode_body_chunk(Chunk body_chunk, ILBMLoadingContext& con
if (context.bm_header.compression == CompressionType::ByteRun) {
auto plane_data = TRY(uncompress_byte_run(body_chunk.data, context));
pixel_data = TRY(planar_to_chunky(plane_data, context));
if (context.format == Format::ILBM)
pixel_data = TRY(planar_to_chunky(plane_data, context));
else
pixel_data = plane_data;
} else {
pixel_data = TRY(planar_to_chunky(body_chunk.data, context));
if (context.format == Format::ILBM)
pixel_data = TRY(planar_to_chunky(body_chunk.data, context));
else
pixel_data = TRY(ByteBuffer::copy(body_chunk.data.data(), body_chunk.data.size()));
}
// Some files already have 64 colors defined in the palette,