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gl: Clear current when destroying current's surface

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When destroying the EGLSurface or GLXDrawable of a GdkSurface, make sure
the current context is not still bound to it.

If it is, clear the current context.

Fixes #4554
This commit is contained in:
Benjamin Otte 2021-12-22 19:49:13 +01:00
parent c5973a630b
commit c419799313
4 changed files with 37 additions and 0 deletions
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31
gdk/gdkglcontext.c
View File

@ -151,6 +151,12 @@ unmask_context (MaskedContext *mask)
return GDK_GL_CONTEXT (GSIZE_TO_POINTER (GPOINTER_TO_SIZE (mask) & ~(gsize) 1));
}
static inline gboolean
mask_is_surfaceless (MaskedContext *mask)
{
return GPOINTER_TO_SIZE (mask) & (gsize) 1;
}
static void
unref_unmasked (gpointer data)
{
@ -1655,6 +1661,31 @@ gdk_gl_context_clear_current (void)
}
}
/*<private>
* gdk_gl_context_clear_current_if_surface:
* @surface: surface to clear for
*
* Does a gdk_gl_context_clear_current() if the current context is attached
* to @surface, leaves the current context alone otherwise.
**/
void
gdk_gl_context_clear_current_if_surface (GdkSurface *surface)
{
MaskedContext *current;
current = g_private_get (&thread_current_context);
if (current != NULL && !mask_is_surfaceless (current))
{
GdkGLContext *context = unmask_context (current);
if (gdk_gl_context_get_surface (context) != surface)
return;
if (GDK_GL_CONTEXT_GET_CLASS (context)->clear_current (context))
g_private_replace (&thread_current_context, NULL);
}
}
/**
* gdk_gl_context_get_current:
*

2
gdk/gdkglcontextprivate.h
View File

@ -99,6 +99,8 @@ gboolean gdk_gl_backend_can_be_used (GdkGLBackend
GError **error);
void gdk_gl_backend_use (GdkGLBackend backend_type);
void gdk_gl_context_clear_current_if_surface (GdkSurface *surface);
GdkGLContext * gdk_gl_context_new (GdkDisplay *display,
GdkSurface *surface);

2
gdk/gdksurface.c
View File

@ -1095,6 +1095,7 @@ gdk_surface_set_egl_native_window (GdkSurface *self,
if (priv->egl_surface != NULL)
{
gdk_gl_context_clear_current_if_surface (self);
eglDestroySurface (gdk_surface_get_display (self), priv->egl_surface);
priv->egl_surface = NULL;
}
@ -1123,6 +1124,7 @@ gdk_surface_ensure_egl_surface (GdkSurface *self,
priv->egl_surface != NULL &&
gdk_display_get_egl_config_high_depth (display) != gdk_display_get_egl_config (display))
{
gdk_gl_context_clear_current_if_surface (self);
eglDestroySurface (gdk_surface_get_display (self), priv->egl_surface);
priv->egl_surface = NULL;
}

2
gdk/x11/gdkglcontext-glx.c
View File

@ -71,6 +71,8 @@ gdk_x11_surface_destroy_glx_drawable (GdkX11Surface *self)
if (self->glx_drawable == None)
return;
gdk_gl_context_clear_current_if_surface (GDK_SURFACE (self));
glXDestroyWindow (gdk_x11_display_get_xdisplay (gdk_surface_get_display (GDK_SURFACE (self))),
self->glx_drawable);