[PATCH 0/1] MR8384: win32u: Avoid reading GL data past the end of the memory DC bitmap.

[Rémi Bernon]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58384

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/8384

[PATCH 1/1] win32u: Avoid reading GL data past the end of the memory DC bitmap.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58384
---
 dlls/win32u/opengl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/win32u/opengl.c b/dlls/win32u/opengl.c
index a8a898ba7be..17c642abc5e 100644
--- a/dlls/win32u/opengl.c
+++ b/dlls/win32u/opengl.c
@@ -844,7 +844,7 @@ static BOOL flush_memory_pbuffer( struct wgl_context *context, HDC hdc, BOOL wri
 
         if (!get_image_from_bitmap( bmp, info, &bits, &src ))
         {
-            int width = info->bmiHeader.biWidth, height = abs( info->bmiHeader.biHeight );
+            int width = info->bmiHeader.biWidth, height = info->bmiHeader.biSizeImage / 4 / width;
             if (write) funcs->p_glDrawPixels( width, height, GL_BGRA, GL_UNSIGNED_BYTE, bits.ptr );
             else funcs->p_glReadPixels( 0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, bits.ptr );
         }
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/8384