gdiplus: Check SHADEBLENDCAPS only for printer devices.

[Vincent Povirk]

For bug 43062.

Signed-off-by: Vincent Povirk <vincent at codeweavers.com>
---
 dlls/gdiplus/graphics.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index 6c0d58d..815ffb0 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -324,7 +324,8 @@ static void transform_and_round_points(GpGraphics *graphics, POINT *pti,
 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, SHADEBLENDCAPS) == SB_NONE)
+    if (GetDeviceCaps(graphics->hdc, TECHNOLOGY) == DT_RASPRINTER &&
+        GetDeviceCaps(graphics->hdc, SHADEBLENDCAPS) == SB_NONE)
     {
         TRACE("alpha blending not supported by device, fallback to StretchBlt\n");
 
@@ -404,7 +405,8 @@ static GpStatus alpha_blend_hdc_pixels(GpGraphics *graphics, INT dst_x, INT dst_
     hbitmap = CreateDIBSection(hdc, (BITMAPINFO*)&bih, DIB_RGB_COLORS,
         (void**)&temp_bits, NULL, 0);
 
-    if (GetDeviceCaps(graphics->hdc, SHADEBLENDCAPS) == SB_NONE ||
+    if ((GetDeviceCaps(graphics->hdc, TECHNOLOGY) == DT_RASPRINTER &&
+         GetDeviceCaps(graphics->hdc, SHADEBLENDCAPS) == SB_NONE) ||
             fmt & PixelFormatPAlpha)
         memcpy(temp_bits, src, src_width * src_height * 4);
     else
-- 
2.7.4