Vincent Povirk : gdiplus: Correct the coordinate transform for non-rectangular parallelograms.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bb9c1878c3aeb2b0ee17b57be23c07b661ade45c
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=bb9c1878c3aeb2b0ee17b57be2...

Author: Vincent Povirk 
Date:   Thu Apr 15 15:13:34 2010 -0500

gdiplus: Correct the coordinate transform for non-rectangular parallelograms.

Apparently matrices in gdiplus don't work the way I think they do.

---

dlls/gdiplus/graphics.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index 5a75fd0..b0cba47 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -2030,11 +2030,11 @@ GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image
             }

m11 = (ptf[1].X - ptf[0].X) / srcwidth;
-            m12 = (ptf[2].X - ptf[0].X) / srcheight;
-            mdx = ptf[0].X - m11 * srcx - m12 * srcy;
-            m21 = (ptf[1].Y - ptf[0].Y) / srcwidth;
+            m21 = (ptf[2].X - ptf[0].X) / srcheight;
+            mdx = ptf[0].X - m11 * srcx - m21 * srcy;
+            m12 = (ptf[1].Y - ptf[0].Y) / srcwidth;
             m22 = (ptf[2].Y - ptf[0].Y) / srcheight;
-            mdy = ptf[0].Y - m21 * srcx - m22 * srcy;
+            mdy = ptf[0].Y - m12 * srcx - m22 * srcy;

stat = GdipCreateMatrix2(m11, m12, m21, m22, mdx, mdy, &dst_to_src);
             if (stat != Ok) return stat;