uxtheme: Fix colour errors in UXTHEME_StretchBlt.

dlls/uxtheme/draw.c

@@ -293,22 +293,33 @@ static inline BOOL UXTHEME_StretchBlt(HDC hdcDst, int nXOriginDst, int nYOriginD
       255,         /* SourceConstantAlpha */
       AC_SRC_ALPHA /* AlphaFormat */
     };
+
+    BOOL ret = TRUE;
+    int old_stretch_mode;
+    POINT old_brush_org;
+
+    old_stretch_mode = SetStretchBltMode(hdcDst, HALFTONE);
+    SetBrushOrgEx(hdcDst, nXOriginDst, nYOriginDst, &old_brush_org);
+
     if (transparent == ALPHABLEND_BINARY) {
         /* Ensure we don't pass any negative values to TransparentBlt */
-        return TransparentBlt(hdcDst, nXOriginDst, nYOriginDst, abs(nWidthDst), abs(nHeightDst),
+        ret = TransparentBlt(hdcDst, nXOriginDst, nYOriginDst, abs(nWidthDst), abs(nHeightDst),
                               hdcSrc, nXOriginSrc, nYOriginSrc, abs(nWidthSrc), abs(nHeightSrc),
                               transcolor);
-    }
-    if ((transparent == ALPHABLEND_NONE) ||
+    } else if ((transparent == ALPHABLEND_NONE) ||
         !AlphaBlend(hdcDst, nXOriginDst, nYOriginDst, nWidthDst, nHeightDst,
                     hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc,
                     blendFunc))
     {
-        return StretchBlt(hdcDst, nXOriginDst, nYOriginDst, nWidthDst, nHeightDst,
+        ret = StretchBlt(hdcDst, nXOriginDst, nYOriginDst, nWidthDst, nHeightDst,
                           hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc,
                           SRCCOPY);
     }
-    return TRUE;
+
+    SetBrushOrgEx(hdcDst, old_brush_org.x, old_brush_org.y, NULL);
+    SetStretchBltMode(hdcDst, old_stretch_mode);
+
+    return ret;
 }
 
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