1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/cairo/win32-cleartype-clipping.patch Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,23 @@
1.4 +diff --git a/gfx/cairo/cairo/src/cairo-win32-font.c b/gfx/cairo/cairo/src/cairo-win32-font.c
1.5 +--- a/gfx/cairo/cairo/src/cairo-win32-font.c
1.6 ++++ b/gfx/cairo/cairo/src/cairo-win32-font.c
1.7 +@@ -986,6 +986,19 @@ _cairo_win32_scaled_font_init_glyph_metr
1.8 + &metrics, 0, NULL, &matrix) == GDI_ERROR) {
1.9 + status = _cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_init_glyph_metrics:GetGlyphOutlineW");
1.10 + memset (&metrics, 0, sizeof (GLYPHMETRICS));
1.11 ++ } else {
1.12 ++ if (metrics.gmBlackBoxX > 0 && scaled_font->base.options.antialias != CAIRO_ANTIALIAS_NONE) {
1.13 ++ /* The bounding box reported by Windows supposedly contains the glyph's "black" area;
1.14 ++ * however, antialiasing (especially with ClearType) means that the actual image that
1.15 ++ * needs to be rendered may "bleed" into the adjacent pixels, mainly on the right side.
1.16 ++ * To avoid clipping the glyphs when drawn by _cairo_surface_fallback_show_glyphs,
1.17 ++ * for example, or other code that uses glyph extents to determine the area to update,
1.18 ++ * we add a pixel of "slop" to left side of the nominal "black" area returned by GDI,
1.19 ++ * and two pixels to the right (as tests show some glyphs bleed into this column).
1.20 ++ */
1.21 ++ metrics.gmptGlyphOrigin.x -= 1;
1.22 ++ metrics.gmBlackBoxX += 3;
1.23 ++ }
1.24 + }
1.25 + cairo_win32_scaled_font_done_font (&scaled_font->base);
1.26 + if (status)
