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LibGfx: Enable subpixel accurate text rendering in Painter::draw_text()

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This improves kerning and alignment jittering quite a bit :^)
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MacDue 2023-01-04 20:10:00 +01:00 • committed by Andreas Kling
parent ada48a1daf
commit 6632023498
1 changed files with 4 additions and 3 deletions
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7
Userland/Libraries/LibGfx/Painter.cpp
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@ -1382,13 +1382,14 @@ FLATTEN void Painter::draw_glyph(FloatPoint point, u32 code_point, Color color)
FLATTEN void Painter::draw_glyph(FloatPoint point, u32 code_point, Font const& font, Color color) FLATTEN void Painter::draw_glyph(FloatPoint point, u32 code_point, Font const& font, Color color)
{ {
auto glyph = font.glyph(code_point); auto top_left = point + FloatPoint(font.glyph_left_bearing(code_point), 0);
auto top_left = point + IntPoint(glyph.left_bearing(), 0); auto glyph_position = Gfx::GlyphRasterPosition::get_nearest_fit_for(top_left);
auto glyph = font.glyph(code_point, glyph_position.subpixel_offset);
if (glyph.is_glyph_bitmap()) { if (glyph.is_glyph_bitmap()) {
draw_bitmap(top_left.to_type<int>(), glyph.glyph_bitmap(), color); draw_bitmap(top_left.to_type<int>(), glyph.glyph_bitmap(), color);
} else { } else {
blit_filtered(top_left.to_type<int>(), *glyph.bitmap(), glyph.bitmap()->rect(), [color](Color pixel) -> Color { blit_filtered(glyph_position.blit_position, *glyph.bitmap(), glyph.bitmap()->rect(), [color](Color pixel) -> Color {
return pixel.multiply(color); return pixel.multiply(color);
}); });
} }