[PATCH 1/1] winex11: Expose only EGL configs that match the display depth.

[Elizabeth Figura]

From: Elizabeth Figura

---
 dlls/win32u/opengl.c         |  1 +
 dlls/winex11.drv/opengl.c    | 23 +++++++++++++++++++++++
 include/wine/opengl_driver.h |  1 +
 3 files changed, 25 insertions(+)

diff --git a/dlls/win32u/opengl.c b/dlls/win32u/opengl.c
index fc0be5795d4..2f3645bcf28 100644
--- a/dlls/win32u/opengl.c
+++ b/dlls/win32u/opengl.c
@@ -469,6 +469,7 @@ static UINT egldrv_init_pixel_formats( UINT *onscreen_count )
     for (i = 0, j = 0; i < count; i++)
     {
         funcs->p_eglGetConfigAttrib( egl->display, configs[i], EGL_RENDERABLE_TYPE, &render );
+        if (egl->filter_config && !egl->filter_config( egl, configs[i] )) continue;
         if (render & EGL_OPENGL_BIT) configs[j++] = configs[i];
     }
     count = j;
diff --git a/dlls/winex11.drv/opengl.c b/dlls/winex11.drv/opengl.c
index c4cc2b1fe1f..f02c6a7a6e8 100644
--- a/dlls/winex11.drv/opengl.c
+++ b/dlls/winex11.drv/opengl.c
@@ -463,10 +463,33 @@ done:
     return ret;
 }

+static BOOL x11drv_egl_filter_config( struct egl_platform *egl, EGLConfig config )
+{
+    XVisualInfo *visuals;
+    XVisualInfo visual;
+    int count;
+
+    funcs->p_eglGetConfigAttrib( egl->display, config, EGL_NATIVE_VISUAL_ID, (EGLint *)&visual.visualid );
+    if (!(visuals = XGetVisualInfo( gdi_display, VisualIDMask, &visual, &count ))) return FALSE;
+
+    /* Reject 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. */
+    if (visuals->depth != default_visual.depth)
+    {
+        XFree( visuals );
+        return FALSE;
+    }
+
+    XFree( visuals );
+    return TRUE;
+}
+
 static void x11drv_init_egl_platform( struct egl_platform *platform )
 {
     platform->type = EGL_PLATFORM_X11_KHR;
     platform->native_display = gdi_display;
+    platform->filter_config = x11drv_egl_filter_config;
     egl = platform;
 }

diff --git a/include/wine/opengl_driver.h b/include/wine/opengl_driver.h
index e9052392471..60117e03cc9 100644
--- a/include/wine/opengl_driver.h
+++ b/include/wine/opengl_driver.h
@@ -134,6 +134,7 @@ struct egl_platform
     EGLenum              type;
     EGLNativeDisplayType native_display;
     BOOL                 force_pbuffer_formats;
+    BOOL (*filter_config)(struct egl_platform *platform, EGLConfig config);

/* filled by win32u after init_egl_platform */
     EGLDeviceEXT         device;