Bug 297705 - correct cairo_text_extents() on win32 for general transforms.

r=otaylor, r+a=shaver.

gfx/cairo/README

@@ -30,3 +30,7 @@ PATCHES:
 
   optimize-opaque-paint.diff - if cairo_paint_with_alpha is called
       with alpha == 1.0, turn it into cairo_paint
+
+  win32-extents.diff - correct text extents for general tranforms
+      (upstream patch)
+

gfx/cairo/cairo/src/cairo-win32-font.c

@@ -714,7 +714,7 @@ _cairo_win32_scaled_font_glyph_extents (void		     *abstract_font,
 	_cairo_win32_scaled_font_done_unscaled_font (&scaled_font->base);
 
 	extents->x_bearing = (double)metrics.gmptGlyphOrigin.x / scaled_font->em_square;
-	extents->y_bearing = (double)metrics.gmptGlyphOrigin.y / scaled_font->em_square;
+	extents->y_bearing = - (double)metrics.gmptGlyphOrigin.y / scaled_font->em_square;
 	extents->width = (double)metrics.gmBlackBoxX / scaled_font->em_square;
 	extents->height = (double)metrics.gmBlackBoxY / scaled_font->em_square;
 	extents->x_advance = (double)metrics.gmCellIncX / scaled_font->em_square;