Esme Povirk : gdiplus: Bracket HDC use in alpha_blend_pixels_hrgn.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ed3cd9b35f095c5258ad48b5283e1bbd84646046
URL:    https://gitlab.winehq.org/wine/wine/-/commit/ed3cd9b35f095c5258ad48b5283e1bb...

Author: Esme Povirk <esme(a)codeweavers.com>
Date:   Thu May  2 14:25:33 2024 -0500

gdiplus: Bracket HDC use in alpha_blend_pixels_hrgn.

---

 dlls/gdiplus/graphics.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index 3c00eddddf4..78e3b07222d 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -591,28 +591,39 @@ static GpStatus alpha_blend_pixels_hrgn(GpGraphics *graphics, INT dst_x, INT dst
     }
     else
     {
+        HDC hdc;
         HRGN hrgn;
         int save;
 
+        stat = gdi_dc_acquire(graphics, &hdc);
+
+        if (stat != Ok)
+            return stat;
+
         stat = get_clip_hrgn(graphics, &hrgn);
 
         if (stat != Ok)
+        {
+            gdi_dc_release(graphics, hdc);
             return stat;
+        }
 
-        save = SaveDC(graphics->hdc);
+        save = SaveDC(hdc);
 
-        ExtSelectClipRgn(graphics->hdc, hrgn, RGN_COPY);
+        ExtSelectClipRgn(hdc, hrgn, RGN_COPY);
 
         if (hregion)
-            ExtSelectClipRgn(graphics->hdc, hregion, RGN_AND);
+            ExtSelectClipRgn(hdc, hregion, RGN_AND);
 
         stat = alpha_blend_hdc_pixels(graphics, dst_x, dst_y, src, src_width,
             src_height, src_stride, fmt);
 
-        RestoreDC(graphics->hdc, save);
+        RestoreDC(hdc, save);
 
         DeleteObject(hrgn);
 
+        gdi_dc_release(graphics, hdc);
+
         return stat;
     }
 }