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LibPDF: Add basic ICCBased color space handling

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Matthew Olsson 2022-03-24 10:08:43 -07:00 • committed by Andreas Kling
parent 1238e65d30
commit e1115cfe48
3 changed files with 39 additions and 0 deletions
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25
Userland/Libraries/LibPDF/ColorSpace.cpp
View file

@ -40,6 +40,9 @@ PDFErrorOr<NonnullRefPtr<ColorSpace>> ColorSpace::create(Document* document, Fly
if (color_space_name == CommonNames::CalRGB) if (color_space_name == CommonNames::CalRGB)
return TRY(CalRGBColorSpace::create(document, move(parameters))); return TRY(CalRGBColorSpace::create(document, move(parameters)));
if (color_space_name == CommonNames::ICCBased)
return TRY(ICCBasedColorSpace::create(document, page, move(parameters)));
dbgln("Unknown color space: {}", color_space_name); dbgln("Unknown color space: {}", color_space_name);
TODO(); TODO();
} }
@ -258,4 +261,26 @@ Color CalRGBColorSpace::color(Vector<Value> const& arguments) const
return Color(red, green, blue); return Color(red, green, blue);
} }
PDFErrorOr<NonnullRefPtr<ColorSpace>> ICCBasedColorSpace::create(Document* document, Page const& page, Vector<Value>&& parameters)
{
if (parameters.is_empty())
return Error { Error::Type::MalformedPDF, "ICCBased color space expected one parameter" };
auto param = TRY(document->resolve(parameters[0]));
if (!param.has<NonnullRefPtr<Object>>() || !param.get<NonnullRefPtr<Object>>()->is<StreamObject>())
return Error { Error::Type::MalformedPDF, "ICCBased color space expects a stream parameter" };
auto dict = param.get<NonnullRefPtr<Object>>()->cast<StreamObject>()->dict();
if (!dict->contains(CommonNames::Alternate))
TODO();
auto alternate = TRY(dict->get_name(document, CommonNames::Alternate))->name();
return TRY(ColorSpace::create(document, alternate, page));
}
Color ICCBasedColorSpace::color(Vector<Value> const&) const
{
VERIFY_NOT_REACHED();
}
} }

12
Userland/Libraries/LibPDF/ColorSpace.h
View file

@ -89,4 +89,16 @@ private:
Array<float, 9> m_matrix { 1, 0, 0, 0, 1, 0, 0, 0, 1 }; Array<float, 9> m_matrix { 1, 0, 0, 0, 1, 0, 0, 0, 1 };
}; };
class ICCBasedColorSpace final : public ColorSpace {
public:
static PDFErrorOr<NonnullRefPtr<ColorSpace>> create(Document*, Page const&, Vector<Value>&& parameters);
~ICCBasedColorSpace() override = default;
Color color(Vector<Value> const& arguments) const override;
private:
ICCBasedColorSpace() = delete;
};
} }

2
Userland/Libraries/LibPDF/CommonNames.h
View file

@ -10,6 +10,7 @@
#define ENUMERATE_COMMON_NAMES(A) \ #define ENUMERATE_COMMON_NAMES(A) \
A(AIS) \ A(AIS) \
A(Alternate) \
A(ASCII85Decode) \ A(ASCII85Decode) \
A(ASCIIHexDecode) \ A(ASCIIHexDecode) \
A(BG) \ A(BG) \
@ -63,6 +64,7 @@
A(H) \ A(H) \
A(HT) \ A(HT) \
A(HTO) \ A(HTO) \
A(ICCBased) \
A(ID) \ A(ID) \
A(JBIG2Decode) \ A(JBIG2Decode) \
A(JPXDecode) \ A(JPXDecode) \