Jiajin Cui : gdiplus: Fix crash if failed to create bitmap.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: 25137e1cc16da13656a3c1f1fa6163062a3459c1
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=25137e1cc16da13656a3c1f1f...

Author: Jiajin Cui 
Date:   Fri Jul 17 17:34:09 2020 +0800

gdiplus: Fix crash if failed to create bitmap.

Signed-off-by: Jiajin Cui 
Signed-off-by: Esme Povirk 
Signed-off-by: Alexandre Julliard 
(cherry picked from commit f992bc77c87889c37cbd80aced707e6d1a537c8c)
Signed-off-by: Michael Stefaniuc

---

dlls/gdiplus/graphics.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index 2d7f4bdb80f..fa46e7cc4ce 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -432,6 +432,9 @@ 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(!hbitmap || !temp_bits)
+        goto done;
+
     if ((GetDeviceCaps(graphics->hdc, TECHNOLOGY) == DT_RASPRINTER &&
          GetDeviceCaps(graphics->hdc, SHADEBLENDCAPS) == SB_NONE) ||
             fmt & PixelFormatPAlpha)
@@ -443,9 +446,12 @@ static GpStatus alpha_blend_hdc_pixels(GpGraphics *graphics, INT dst_x, INT dst_
     SelectObject(hdc, hbitmap);
     gdi_alpha_blend(graphics, dst_x, dst_y, src_width, src_height,
                     hdc, 0, 0, src_width, src_height);
-    DeleteDC(hdc);
+
     DeleteObject(hbitmap);

+done:
+    DeleteDC(hdc);
+
     return Ok;
 }