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LibPDF: Support setting pattern color spaces via a named resource

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`/CS0 cs` in a form where the form has
`/Resources<</ColorSpace<</CS0 [/Pattern]>>>>` now works.

This happens e.g. in 2025-Laurenz-Thesis.pdf --page 34
(which has page number 29 written on it).
This commit is contained in:
Nico Weber committed 2026-08-11 23:45:49 -04:00
1 parent 0c8a3d6cf7
commit 2ccde42476
2 files changed
+4 -4
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Userland/Libraries/LibPDF/Renderer.cpp
+3 -3
View File
@@ -1844,12 +1844,12 @@ PDFErrorOr<NonnullRefPtr<ColorSpace>> Renderer::get_color_space_from_resources(V
auto color_space_resource_dict = TRY(resources->get_dict(m_document, CommonNames::ColorSpace));
if (!color_space_resource_dict->contains(color_space_name))
return Error::malformed_error("ColorSpace resource dictionary does not contain {}", color_space_name);
return get_color_space_from_document(TRY(color_space_resource_dict->get_object(m_document, color_space_name)));
return get_color_space_from_document(TRY(color_space_resource_dict->get_object(m_document, color_space_name)), resources);
}
PDFErrorOr<NonnullRefPtr<ColorSpace>> Renderer::get_color_space_from_document(NonnullRefPtr<Object> color_space_object)
PDFErrorOr<NonnullRefPtr<ColorSpace>> Renderer::get_color_space_from_document(NonnullRefPtr<Object> color_space_object, Optional<NonnullRefPtr<DictObject>> resources)
{
return ColorSpace::create(m_document, color_space_object, *this);
return ColorSpace::create(m_document, color_space_object, *this, resources);
}
Gfx::AffineTransform const& Renderer::calculate_text_rendering_matrix() const
Userland/Libraries/LibPDF/Renderer.h
+1 -1
View File
@@ -228,7 +228,7 @@ private:
PDFErrorOr<void> paint_image_xobject(NonnullRefPtr<StreamObject>);
void paint_empty_image(Gfx::IntSize);
PDFErrorOr<NonnullRefPtr<ColorSpace>> get_color_space_from_resources(Value const&, NonnullRefPtr<DictObject>);
PDFErrorOr<NonnullRefPtr<ColorSpace>> get_color_space_from_document(NonnullRefPtr<Object>);
PDFErrorOr<NonnullRefPtr<ColorSpace>> get_color_space_from_document(NonnullRefPtr<Object>, Optional<NonnullRefPtr<DictObject>> = {});
static ColorOrStyle style_with_alpha(ColorOrStyle style, float alpha)
{