gdiplus: Fix error when drawing from a rectangle outside bitmap bounds.

[Vincent Povirk]

For bug 37394.

Supersedes 107306.
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From 589fd9d161b21d58f50acc45b454f8a2d544d9f2 Mon Sep 17 00:00:00 2001
From: Vincent Povirk <vincent at codeweavers.com>
Date: Tue, 28 Oct 2014 16:09:57 -0500
Subject: [PATCH 1/2] gdiplus: Fix error when drawing from a rectangle outside
 bitmap bounds.

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

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index d192bf2..840d866 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -827,6 +827,10 @@ static void get_bitmap_sample_size(InterpolationMode interpolation, WrapMode wra
             right = bitmap->width-1;
         if (bottom >= bitmap->height)
             bottom = bitmap->height-1;
+        if (bottom < top || right < left)
+            /* entirely outside image, just sample a pixel so we don't have to
+             * special-case this later */
+            left = top = right = bottom = 0;
     }
     else
     {
-- 
2.1.0