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LibGfx/Painter: Keep translation and clip_rect in logical coordinates

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Moves Painter away from general affine transport support a bit, but
this scale factor business does feel like it's a bit different.

This is conceptually cleaner (everything should use logical coordinates
as much as possible), and it means the code in GUI::Painter() will work
without changes due to that, but the draw function implementations
overall get a bit murkier (draw_rect() becomes nicer though). Still,
feels like the right direction.

No behavior change.
This commit is contained in:
Nico Weber 2021-01-20 09:59:22 -05:00 • committed by Andreas Kling
parent 362bde4a86
commit 91aa0d9997
2 changed files with 73 additions and 64 deletions
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8
Userland/Libraries/LibGfx/Painter.h
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@ -118,7 +118,7 @@ public:
void clear_clip_rect();
void translate(int dx, int dy) { translate({ dx, dy }); }
void translate(const IntPoint& delta) { state().translation.move_by(delta * state().scale); }
void translate(const IntPoint& delta) { state().translation.move_by(delta); }
Gfx::Bitmap* target() { return m_target.ptr(); }
@ -131,8 +131,8 @@ public:
protected:
IntPoint translation() const { return state().translation; }
IntRect to_physical(const IntRect& r) const { return (r * scale()).translated(translation()); }
IntPoint to_physical(const IntPoint& p) const { return (p * scale()).translated(translation()); }
IntRect to_physical(const IntRect& r) const { return r.translated(translation()) * scale(); }
IntPoint to_physical(const IntPoint& p) const { return p.translated(translation()) * scale(); }
int scale() const { return state().scale; }
void set_physical_pixel_with_draw_op(u32& pixel, const Color&);
void fill_physical_scanline_with_draw_op(int y, int x, int width, const Color& color);
@ -146,7 +146,7 @@ protected:
const Font* font;
IntPoint translation;
int scale = 1;
IntRect clip_rect; // In physical coordinates.
IntRect clip_rect;
DrawOp draw_op;
};