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LibGfx+LibPDF: Apply subpixel offset in affine transformation

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MacDue 2023-01-05 11:17:47 +00:00 • committed by Andreas Kling
parent 6c85088952
commit eeb6072f15
6 changed files with 15 additions and 15 deletions
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6
Userland/Libraries/LibGfx/Font/OpenType/Glyf.cpp
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@ -351,8 +351,10 @@ RefPtr<Gfx::Bitmap> Glyf::Glyph::rasterize_simple(i16 font_ascender, i16 font_de
u32 width = (u32)(ceilf((m_xmax - m_xmin) * x_scale)) + 2;
u32 height = (u32)(ceilf((font_ascender - font_descender) * y_scale)) + 2;
Gfx::PathRasterizer rasterizer(Gfx::IntSize(width, height));
rasterizer.translate(subpixel_offset.to_float_point());
auto affine = Gfx::AffineTransform().scale(x_scale, -y_scale).translate(-m_xmin, -font_ascender);
auto affine = Gfx::AffineTransform()
.translate(subpixel_offset.to_float_point())
.scale(x_scale, -y_scale)
.translate(-m_xmin, -font_ascender);
rasterize_impl(rasterizer, affine);
return rasterizer.accumulate();
}

6
Userland/Libraries/LibGfx/Font/OpenType/Glyf.h
View file

@ -126,8 +126,10 @@ public:
u32 width = (u32)(ceilf((m_xmax - m_xmin) * x_scale)) + 1;
u32 height = (u32)(ceilf((font_ascender - font_descender) * y_scale)) + 1;
Gfx::PathRasterizer rasterizer(Gfx::IntSize(width, height));
rasterizer.translate(subpixel_offset.to_float_point());
auto affine = Gfx::AffineTransform().scale(x_scale, -y_scale).translate(-m_xmin, -font_ascender);
auto affine = Gfx::AffineTransform()
.translate(subpixel_offset.to_float_point())
.scale(x_scale, -y_scale)
.translate(-m_xmin, -font_ascender);
rasterize_composite_loop(rasterizer, affine, glyph_callback);

2
Userland/Libraries/LibGfx/Font/PathRasterizer.cpp
View file

@ -20,7 +20,7 @@ PathRasterizer::PathRasterizer(Gfx::IntSize size)
void PathRasterizer::draw_path(Gfx::Path& path)
{
for (auto& line : path.split_lines())
draw_line(line.from.translated(translation()), line.to.translated(translation()));
draw_line(line.from, line.to);
}
RefPtr<Gfx::Bitmap> PathRasterizer::accumulate()

5
Userland/Libraries/LibGfx/Font/PathRasterizer.h
View file

@ -18,15 +18,10 @@ public:
void draw_path(Gfx::Path&);
RefPtr<Gfx::Bitmap> accumulate();
void translate(Gfx::FloatPoint delta) { m_translation.translate_by(delta); }
Gfx::FloatPoint translation() const { return m_translation; }
private:
void draw_line(Gfx::FloatPoint, Gfx::FloatPoint);
Gfx::IntSize m_size;
Gfx::FloatPoint m_translation;
Vector<float> m_data;
};