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LibPDF: Parse page crop box and user units

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Matthew Olsson 2021-05-10 10:44:22 -07:00 • committed by Andreas Kling
parent 43724ac282
commit d6a9b41bac
2 changed files with 28 additions and 5 deletions
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20
Userland/Libraries/LibPDF/Document.cpp
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@ -63,6 +63,8 @@ Page Document::get_page(u32 index)
auto raw_page_object = resolve_to<DictObject>(get_or_load_value(page_object_index)); auto raw_page_object = resolve_to<DictObject>(get_or_load_value(page_object_index));
auto resources = raw_page_object->get_dict(this, "Resources"); auto resources = raw_page_object->get_dict(this, "Resources");
auto contents = raw_page_object->get_object(this, "Contents");
auto media_box_array = raw_page_object->get_array(this, "MediaBox"); auto media_box_array = raw_page_object->get_array(this, "MediaBox");
auto media_box = Rectangle { auto media_box = Rectangle {
media_box_array->at(0).to_float(), media_box_array->at(0).to_float(),
@ -70,9 +72,23 @@ Page Document::get_page(u32 index)
media_box_array->at(2).to_float(), media_box_array->at(2).to_float(),
media_box_array->at(3).to_float(), media_box_array->at(3).to_float(),
}; };
auto contents = raw_page_object->get_object(this, "Contents");
Page page { resources, media_box, contents }; auto crop_box = media_box;
if (raw_page_object->contains("CropBox")) {
auto crop_box_array = raw_page_object->get_array(this, "CropBox");
crop_box = Rectangle {
crop_box_array->at(0).to_float(),
crop_box_array->at(1).to_float(),
crop_box_array->at(2).to_float(),
crop_box_array->at(3).to_float(),
};
}
float user_unit = 1.0f;
if (raw_page_object->contains("UserUnit"))
user_unit = raw_page_object->get_value("UserUnit").to_float();
Page page { move(resources), move(contents), media_box, crop_box, user_unit };
m_pages.set(index, page); m_pages.set(index, page);
return page; return page;
} }

13
Userland/Libraries/LibPDF/Document.h
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@ -24,8 +24,10 @@ struct Rectangle {
struct Page { struct Page {
NonnullRefPtr<DictObject> resources; NonnullRefPtr<DictObject> resources;
Rectangle media_box;
NonnullRefPtr<Object> contents; NonnullRefPtr<Object> contents;
Rectangle media_box;
Rectangle crop_box;
float user_unit;
}; };
class Document final : public RefCounted<Document> { class Document final : public RefCounted<Document> {
@ -105,8 +107,13 @@ template<>
struct Formatter<PDF::Page> : Formatter<StringView> { struct Formatter<PDF::Page> : Formatter<StringView> {
void format(FormatBuilder& builder, const PDF::Page& page) void format(FormatBuilder& builder, const PDF::Page& page)
{ {
constexpr auto fmt_string = "Page {{\n resources={}\n contents={}\n media_box={}\n}}"; constexpr auto fmt_string = "Page {{\n resources={}\n contents={}\n media_box={}\n crop_box={}\n user_unit={}\n}}";
auto str = String::formatted(fmt_string, page.resources->to_string(1), page.contents->to_string(1), page.media_box); auto str = String::formatted(fmt_string,
page.resources->to_string(1),
page.contents->to_string(1),
page.media_box,
page.crop_box,
page.user_unit);
Formatter<StringView>::format(builder, str); Formatter<StringView>::format(builder, str);
} }
}; };