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Code Issues Activity Actions

PDFViewer: Add actions to rotate the displayed PDF

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This implements the rotate cw/ccw actions in PDFViewer.
Since the rendered pages are stored in a HashMap for caching,
the bitmap is wrapped in a struct with the current rotation.
This way the caching works as expected while zooming, and a new bitmap
is rendered when the page is rotated.
This commit is contained in:
Marcus Nilsson 2022-01-03 00:24:11 +01:00 • committed by Andreas Kling
parent cecbed467b
commit eb97617ff0
4 changed files with 36 additions and 7 deletions
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9
Userland/Applications/PDFViewer/PDFViewer.h
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@ -52,6 +52,7 @@ public:
void zoom_in();
void zoom_out();
void reset_zoom();
void rotate(int degrees);
protected:
PDFViewer();
@ -64,14 +65,20 @@ protected:
virtual void timer_event(Core::TimerEvent&) override;
private:
struct RenderedPage {
RefPtr<Gfx::Bitmap> bitmap;
int rotation;
};
RefPtr<Gfx::Bitmap> get_rendered_page(u32 index);
RefPtr<Gfx::Bitmap> render_page(const PDF::Page&);
RefPtr<PDF::Document> m_document;
u32 m_current_page_index { 0 };
Vector<HashMap<u32, RefPtr<Gfx::Bitmap>>> m_rendered_page_list;
Vector<HashMap<u32, RenderedPage>> m_rendered_page_list;
u8 m_zoom_level { initial_zoom_level };
Gfx::IntPoint m_pan_starting_position;
int m_rotations { 0 };
};