Jiajin Cui : gdiplus: Make gdi_alpha_blend fallback to StretchBlt if current Compositing Mode is SourceCopy.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 5754bd9c0ae4c74f94b02f242056820a3f483db3
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=5754bd9c0ae4c74f94b02f242056820a3f483db3

Author: Jiajin Cui <cuijiajin at uniontech.com>
Date:   Thu Sep  3 17:17:43 2020 +0800

gdiplus: Make gdi_alpha_blend fallback to StretchBlt if current Compositing Mode is SourceCopy.

Signed-off-by: Jiajin Cui <cuijiajin at uniontech.com>
Signed-off-by: Esme Povirk <esme at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/gdiplus/graphics.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index 5db8973c7b..868aea5642 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -331,8 +331,14 @@ static void round_points(POINT *pti, GpPointF *ptf, INT count)
 static void gdi_alpha_blend(GpGraphics *graphics, INT dst_x, INT dst_y, INT dst_width, INT dst_height,
                             HDC hdc, INT src_x, INT src_y, INT src_width, INT src_height)
 {
-    if (GetDeviceCaps(graphics->hdc, TECHNOLOGY) == DT_RASPRINTER &&
-        GetDeviceCaps(graphics->hdc, SHADEBLENDCAPS) == SB_NONE)
+    CompositingMode comp_mode;
+    INT technology = GetDeviceCaps(graphics->hdc, TECHNOLOGY);
+    INT shadeblendcaps  = GetDeviceCaps(graphics->hdc, SHADEBLENDCAPS);
+
+    GdipGetCompositingMode(graphics, &comp_mode);
+
+    if ((technology == DT_RASPRINTER && shadeblendcaps == SB_NONE)
+        || comp_mode == CompositingModeSourceCopy)
     {
         TRACE("alpha blending not supported by device, fallback to StretchBlt\n");