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WindowServer: Implement simple window shadows

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This implements simple window shadows around most windows, including
tooltips. Because this method uses a bitmap for the shadow bits,
it is limited to rectangular window frames. For non-rectangular
window frames we'll need to implement a more sophisticated algorithm.
This commit is contained in:
Tom 2021-02-08 17:27:51 -07:00 • committed by Andreas Kling
parent 72fdab7bfb
commit 0ce4b9d7db
14 changed files with 234 additions and 70 deletions
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12
Userland/Services/WindowServer/WindowFrame.h
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@ -45,6 +45,7 @@ public:
~WindowFrame();
Gfx::IntRect rect() const;
Gfx::IntRect render_rect() const;
void paint(Gfx::Painter&, const Gfx::IntRect&);
void render(Gfx::Painter&);
void render_to_cache();
@ -64,7 +65,7 @@ public:
void start_flash_animation();
bool has_alpha_channel() const { return m_has_alpha_channel; }
bool has_alpha_channel() const { return m_has_alpha_channel || frame_has_alpha(); }
void set_has_alpha_channel(bool value) { m_has_alpha_channel = value; }
void set_opacity(float);
@ -79,14 +80,19 @@ public:
return true;
}
void scale_changed()
void set_dirty()
{
m_dirty = true;
}
private:
void paint_simple_rect_shadow(Gfx::Painter&, const Gfx::IntRect&, const Gfx::Bitmap&) const;
void paint_notification_frame(Gfx::Painter&);
void paint_normal_frame(Gfx::Painter&);
Gfx::Bitmap* window_shadow() const;
bool frame_has_alpha() const;
Gfx::IntRect inflated_for_shadow(const Gfx::IntRect&) const;
Gfx::Bitmap* inflate_for_shadow(Gfx::IntRect&, Gfx::IntPoint&) const;
Gfx::WindowTheme::WindowState window_state_for_theme() const;
@ -96,6 +102,8 @@ private:
Button* m_maximize_button { nullptr };
Button* m_minimize_button { nullptr };
Gfx::IntPoint m_shadow_offset {};
RefPtr<Gfx::Bitmap> m_top_bottom;
RefPtr<Gfx::Bitmap> m_left_right;
int m_bottom_y { 0 }; // y-offset in m_top_bottom for the bottom half