[PATCH 0/1] MR9460: winex11: Remove PFD_DRAW_TO_WINDOW from EGL configs not matching the display depth.

[Rémi Bernon (＠rbernon)]

Similar to what is being done with GLX, to avoid BadMatch errors with
child window rendering.

Based on a patch from Elizabeth Figura.

Supersedes https://gitlab.winehq.org/wine/wine/-/merge_requests/9322

[PATCH 1/1] winex11: Remove PFD_DRAW_TO_WINDOW from EGL configs not matching the display depth.

[Rémi Bernon]

From: Rémi Bernon

Similar to what is being done with GLX, to avoid BadMatch errors with
child window rendering.

Based on a patch from Elizabeth Figura.
---
 dlls/winex11.drv/opengl.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/dlls/winex11.drv/opengl.c b/dlls/winex11.drv/opengl.c
index c1e4ca8d5af..570c011aabf 100644
--- a/dlls/winex11.drv/opengl.c
+++ b/dlls/winex11.drv/opengl.c
@@ -216,6 +216,7 @@ enum glx_swap_control_method
 static struct glx_pixel_format *pixel_formats;
 static int nb_pixel_formats, nb_onscreen_formats;
 static const struct egl_platform *egl;
+static BOOL (*p_egl_describe_pixel_format)( int format, struct wgl_pixel_format *pf );

/* Selects the preferred GLX swap control method for use by wglSwapIntervalEXT */
 static enum glx_swap_control_method swap_control_method = GLX_SWAP_CONTROL_NONE;
@@ -506,6 +507,22 @@ BOOL visual_from_pixel_format( int format, XVisualInfo *visual )
     }
 }

+static BOOL x11drv_egl_describe_pixel_format( int format, struct wgl_pixel_format *pf )
+{
+    XVisualInfo visual;
+
+    if (!p_egl_describe_pixel_format( format, pf )) return FALSE;
+    if (!visual_from_pixel_format( format, &visual ) || visual.depth != default_visual.depth)
+    {
+        /* Forbid drawing to windows with formats whose depth does not match the screen depth
+         * so that we can copy child windows on-screen using XCopyArea().
+         * See x11drv_init_pixel_formats() for the same logic with GLX. */
+        pf->pfd.dwFlags &= ~PFD_DRAW_TO_WINDOW;
+    }
+
+    return TRUE;
+}
+
 static BOOL x11drv_egl_surface_create( HWND hwnd, int format, struct opengl_drawable **drawable )
 {
     struct opengl_drawable *previous;
@@ -561,6 +578,8 @@ UINT X11DRV_OpenGLInit( UINT version, const struct opengl_funcs *opengl_funcs, c
         x11drv_driver_funcs = **driver_funcs;
         x11drv_driver_funcs.p_init_egl_platform = x11drv_init_egl_platform;
         x11drv_driver_funcs.p_surface_create = x11drv_egl_surface_create;
+        x11drv_driver_funcs.p_describe_pixel_format = x11drv_egl_describe_pixel_format;
+        p_egl_describe_pixel_format = (*driver_funcs)->p_describe_pixel_format;
         *driver_funcs = &x11drv_driver_funcs;
         return STATUS_SUCCESS;
     }

[Elizabeth Figura (＠zfigura)]

Confirmed that this also fixes the bug. Thanks!