[Bug 19393] Word & Excel 2007 scrollbar background/arrow buttons are wrong color, changes based on size

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=19393





--- Comment #5 from Roderick Colenbrander <thunderbird2k at gmail.com>  2009-07-21 16:35:47 ---
Could you both try the following fix? There is a rounding error in coordinates
and this (depending on the driver) should reduce or even completely eliminate
the issue. The issue is that a bitmap with a height of 1 is stretched
interpolated incorrectly (actually the bitmap is a part of a large bitmap and
that is what causes the issues). Bitmaps with a width or height larger than 1
don't have issues. In case of 1x a special optimization can be added which can
fix the issue completely.

diff --git a/dlls/winex11.drv/xrender.c b/dlls/winex11.drv/xrender.c
index 6d290ba..9b6fc2b 100644
--- a/dlls/winex11.drv/xrender.c
+++ b/dlls/winex11.drv/xrender.c
@@ -1724,9 +1724,9 @@ static void set_xrender_transformation(Picture src_pict,
float xscale, float ysc
 {
 #ifdef HAVE_XRENDERSETPICTURETRANSFORM
     XTransform xform = {{
-        { XDoubleToFixed(xscale), XDoubleToFixed(0), XDoubleToFixed(xoffset)
},
-        { XDoubleToFixed(0), XDoubleToFixed(yscale), XDoubleToFixed(yoffset)
},
-        { XDoubleToFixed(0), XDoubleToFixed(0), XDoubleToFixed(1) }
+        { XDoubleToFixed(256*xscale), XDoubleToFixed(0),
XDoubleToFixed(xoffset) },
+        { XDoubleToFixed(0), XDoubleToFixed(256*yscale),
XDoubleToFixed(yoffset) },
+        { XDoubleToFixed(0), XDoubleToFixed(0), XDoubleToFixed(256) }
     }};

     pXRenderSetPictureTransform(gdi_display, src_pict, &xform);

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