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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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9
Userland/Libraries/LibPDF/Fonts/PS1FontProgram.cpp
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@ -96,26 +96,27 @@ PDFErrorOr<void> PS1FontProgram::create(ReadonlyBytes const& bytes, RefPtr<Encod
RefPtr<Gfx::Bitmap> PS1FontProgram::rasterize_glyph(u32 char_code, float width, Gfx::GlyphSubpixelOffset subpixel_offset)
{
auto path = build_char(char_code, width);
auto path = build_char(char_code, width, subpixel_offset);
auto bounding_box = path.bounding_box().size();
u32 w = (u32)ceilf(bounding_box.width()) + 2;
u32 h = (u32)ceilf(bounding_box.height()) + 2;
Gfx::PathRasterizer rasterizer(Gfx::IntSize(w, h));
rasterizer.translate(subpixel_offset.to_float_point());
rasterizer.draw_path(path);
return rasterizer.accumulate();
}
Gfx::Path PS1FontProgram::build_char(u32 char_code, float width)
Gfx::Path PS1FontProgram::build_char(u32 char_code, float width, Gfx::GlyphSubpixelOffset subpixel_offset)
{
auto maybe_glyph = m_glyph_map.get(char_code);
if (!maybe_glyph.has_value())
return {};
auto& glyph = maybe_glyph.value();
auto transform = glyph_transform_to_device_space(glyph, width);
auto transform = Gfx::AffineTransform()
.translate(subpixel_offset.to_float_point())
.multiply(glyph_transform_to_device_space(glyph, width));
// Translate such that the top-left point is at [0, 0].
auto bounding_box = glyph.path.bounding_box();