Ladybird/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-06-11 18:20:43 +09:00
Code Activity

LibPDF: Add initial implementation of XObject rendering

Browse source 
This implementation currently handles Form XObjects only, skipping
image XObjects. When rendering an XObject, its resources are passed to
the underlying operations so they use those instead of the Page's.
This commit is contained in:
Rodrigo Tobar 2022-11-21 13:32:09 +08:00 • committed by Andreas Kling
parent b3007c17bd
commit cb3e05f476
Notes: sideshowbarker 2024-07-17 03:50:25 +09:00
1 changed files with 32 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

33
Userland/Libraries/LibPDF/Renderer.cpp
View file

@ -620,7 +620,38 @@ RENDERER_TODO(shade)
RENDERER_TODO(inline_image_begin)
RENDERER_TODO(inline_image_begin_data)
RENDERER_TODO(inline_image_end)
RENDERER_TODO(paint_xobject)
RENDERER_HANDLER(paint_xobject)
{
VERIFY(args.size() > 0);
auto resources = extra_resources.value_or(m_page.resources);
auto xobject_name = args[0].get<NonnullRefPtr<Object>>()->cast<NameObject>()->name();
auto xobjects_dict = MUST(resources->get_dict(m_document, CommonNames::XObject));
auto xobject = MUST(xobjects_dict->get_stream(m_document, xobject_name));
auto subtype = MUST(xobject->dict()->get_name(m_document, CommonNames::Subtype))->name();
if (subtype == CommonNames::Image) {
dbgln("Skipping image");
return {};
}
MUST(handle_save_state({}));
Vector<Value> matrix;
if (xobject->dict()->contains(CommonNames::Matrix)) {
matrix = xobject->dict()->get_array(m_document, CommonNames::Matrix).value()->elements();
} else {
matrix = Vector { Value { 1 }, Value { 0 }, Value { 0 }, Value { 1 }, Value { 0 }, Value { 0 } };
}
MUST(handle_concatenate_matrix(matrix));
Optional<NonnullRefPtr<DictObject>> xobject_resources {};
if (xobject->dict()->contains(CommonNames::Resources)) {
xobject_resources = xobject->dict()->get_dict(m_document, CommonNames::Resources).value();
}
auto operators = TRY(Parser::parse_operators(m_document, xobject->bytes()));
for (auto& op : operators)
TRY(handle_operator(op, xobject_resources));
MUST(handle_restore_state({}));
return {};
}
RENDERER_HANDLER(marked_content_point)
{