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LibGfx+LibPDF: Apply subpixel offset in affine transformation
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6 changed files with 15 additions and 15 deletions
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@ -96,26 +96,27 @@ PDFErrorOr<void> PS1FontProgram::create(ReadonlyBytes const& bytes, RefPtr<Encod
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RefPtr<Gfx::Bitmap> PS1FontProgram::rasterize_glyph(u32 char_code, float width, Gfx::GlyphSubpixelOffset subpixel_offset)
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{
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auto path = build_char(char_code, width);
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auto path = build_char(char_code, width, subpixel_offset);
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auto bounding_box = path.bounding_box().size();
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u32 w = (u32)ceilf(bounding_box.width()) + 2;
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u32 h = (u32)ceilf(bounding_box.height()) + 2;
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Gfx::PathRasterizer rasterizer(Gfx::IntSize(w, h));
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rasterizer.translate(subpixel_offset.to_float_point());
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rasterizer.draw_path(path);
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return rasterizer.accumulate();
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}
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Gfx::Path PS1FontProgram::build_char(u32 char_code, float width)
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Gfx::Path PS1FontProgram::build_char(u32 char_code, float width, Gfx::GlyphSubpixelOffset subpixel_offset)
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{
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auto maybe_glyph = m_glyph_map.get(char_code);
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if (!maybe_glyph.has_value())
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return {};
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auto& glyph = maybe_glyph.value();
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auto transform = glyph_transform_to_device_space(glyph, width);
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auto transform = Gfx::AffineTransform()
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.translate(subpixel_offset.to_float_point())
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.multiply(glyph_transform_to_device_space(glyph, width));
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// Translate such that the top-left point is at [0, 0].
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auto bounding_box = glyph.path.bounding_box();
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