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macos: glFlush() when switching GL contexts

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The Mac OpenGL programming guide suggests that you glFlush() before changing
contexts to ensure that the commands have been submitted.
This commit is contained in:
Christian Hergert 2020-11-26 11:18:10 -08:00
parent a020c901ba
commit 27b9a9e7ef
1 changed files with 16 additions and 3 deletions
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19
gdk/macos/gdkmacosglcontext.c
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@ -447,15 +447,28 @@ _gdk_macos_gl_context_new (GdkMacosSurface *surface,
gboolean gboolean
_gdk_macos_gl_context_make_current (GdkMacosGLContext *self) _gdk_macos_gl_context_make_current (GdkMacosGLContext *self)
{ {
NSOpenGLContext *current;
g_return_val_if_fail (GDK_IS_MACOS_GL_CONTEXT (self), FALSE); g_return_val_if_fail (GDK_IS_MACOS_GL_CONTEXT (self), FALSE);
if (self->gl_context != nil) if (self->gl_context == NULL)
return FALSE;
current = [NSOpenGLContext currentContext];
if (self->gl_context != current)
{ {
/* The OpenGL mac programming guide suggests that glFlush() is called
* before switching current contexts to ensure that the drawing commands
* are submitted.
*/
if (current != NULL)
glFlush ();
[self->gl_context makeCurrentContext]; [self->gl_context makeCurrentContext];
return TRUE;
} }
return FALSE; return TRUE;
} }
G_GNUC_END_IGNORE_DEPRECATIONS G_GNUC_END_IGNORE_DEPRECATIONS