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From e0363f85f11a3d030d380772db2d98dd5b3fdec1 Mon Sep 17 00:00:00 2001
From: Jonathan Kew <jkew@mozilla.com>
Date: Wed, 22 Apr 2026 13:00:22 -0700
Subject: [PATCH 22/29] Invert sign of delta-y when computing glyph advances
for ExtTextOutW
---
src/win32/cairo-win32-surface.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/win32/cairo-win32-surface.c b/src/win32/cairo-win32-surface.c
index eb90a4fff..87306bd91 100644
--- a/src/win32/cairo-win32-surface.c
+++ b/src/win32/cairo-win32-surface.c
@@ -309,7 +309,8 @@ _cairo_win32_surface_emit_glyphs (cairo_win32_surface_t *dst,
next_logical_y = _cairo_lround (next_user_y);
dxy_buf[j] = _cairo_lround (next_logical_x - logical_x);
- dxy_buf[j+1] = _cairo_lround (next_logical_y - logical_y);
+ /* Note that GDI coordinate system is inverted! */
+ dxy_buf[j+1] = _cairo_lround (logical_y - next_logical_y);
logical_x = next_logical_x;
logical_y = next_logical_y;
--
2.53.0