Fix wrong initial glyph size with native pango_win32 font backend

Turns out somebody (likely cairo or pango) calls SetWorldTransform()
during initialization without resetting it. This resulted in the
font selected on startup having a wrong (tiny) glyph size.

Work around this by explicitly setting the "WorldTransform" again
when subsequently selecting the font.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/libnrtype/FontInstance.cpp b/src/libnrtype/FontInstance.cpp
index 733eb4dd5..d7a90bcd4 100644
--- a/src/libnrtype/FontInstance.cpp
+++ b/src/libnrtype/FontInstance.cpp
@@ -288,6 +288,16 @@ void font_instance::InitTheFace()
 
        FindFontMetrics();
     }
+    
+#ifdef USE_PANGO_WIN32
+    // Someone (probably pango or cairo) sets the world transform during initialization and does not reset it.
+    // Work around this by explicitly setting it again (even if the font is already initialized)
+    XFORM identity = {1.0, 0.0, 0.0, 1.0, 0.0, 0.0};
+    SetWorldTransform(parent->hScreenDC, &identity);
+    SetGraphicsMode(parent->hScreenDC, GM_COMPATIBLE);
+    SelectObject(parent->hScreenDC,theFace);
+#endif
+
 }
 
 void font_instance::FreeTheFace()