gstreamer/subprojects/gst-plugins-base/gst-libs/gst/gl/cocoa/gstglwindow_cocoa.m

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/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2014 Sebastian Dröge <sebastian@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it un der the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
2012-11-08 11:53:56 +00:00
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if !defined(MAC_OS_X_VERSION_MAX_ALLOWED) || MAC_OS_X_VERSION_MAX_ALLOWED >= 1014
# define GL_SILENCE_DEPRECATION
#endif
#include <Cocoa/Cocoa.h>
#include <QuartzCore/QuartzCore.h>
#include "gstgl_cocoa_private.h"
#if MAC_OS_X_VERSION_MAX_ALLOWED < 101200
#define NSWindowStyleMaskTitled NSTitledWindowMask
#define NSWindowStyleMaskClosable NSClosableWindowMask
#define NSWindowStyleMaskResizable NSResizableWindowMask
#define NSWindowStyleMaskMiniaturizable NSMiniaturizableWindowMask
#endif
/* =============================================================*/
/* */
/* GstGLNSWindow declaration */
/* */
/* =============================================================*/
@interface GstGLNSWindow: NSWindow {
BOOL m_isClosed;
GstGLWindowCocoa *window_cocoa;
}
- (id)initWithContentRect:(NSRect)contentRect
styleMask: (unsigned int) styleMask
backing: (NSBackingStoreType) bufferingType
defer: (BOOL) flag screen: (NSScreen *) aScreen
gstWin: (GstGLWindowCocoa *) window;
- (void) setClosed;
- (BOOL) isClosed;
- (BOOL) canBecomeMainWindow;
- (BOOL) canBecomeKeyWindow;
@end
/* =============================================================*/
/* */
/* GstGLWindow */
/* */
/* =============================================================*/
#define GST_CAT_DEFAULT gst_gl_window_cocoa_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
static void gst_gl_window_cocoa_finalize (GObject * object);
static gboolean gst_gl_window_cocoa_open (GstGLWindow *window, GError **err);
static void gst_gl_window_cocoa_close (GstGLWindow *window);
static void gst_gl_window_cocoa_quit (GstGLWindow *window);
static guintptr gst_gl_window_cocoa_get_window_handle (GstGLWindow * window);
static void gst_gl_window_cocoa_set_window_handle (GstGLWindow * window,
guintptr handle);
static void gst_gl_window_cocoa_draw (GstGLWindow * window);
static void gst_gl_window_cocoa_set_preferred_size (GstGLWindow * window,
gint width, gint height);
static void gst_gl_window_cocoa_show (GstGLWindow * window);
static void gst_gl_window_cocoa_queue_resize (GstGLWindow * window);
static void gst_gl_window_cocoa_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy);
static gboolean gst_gl_window_cocoa_set_render_rectangle (GstGLWindow * window,
gint x, gint y, gint width, gint height);
static gboolean gst_gl_window_cocoa_controls_viewport (GstGLWindow * window);
struct _GstGLWindowCocoaPrivate
{
gpointer internal_win_id;
gpointer internal_view;
gpointer external_view;
gboolean visible;
gint preferred_width;
gint preferred_height;
/* atomic set when the internal NSView has been created */
int view_ready;
gpointer gl_queue;
gboolean shutting_down;
GstGLContext *last_context;
};
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_GET (GST_CAT_DEFAULT, "glwindow");
#define gst_gl_window_cocoa_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLWindowCocoa, gst_gl_window_cocoa, GST_TYPE_GL_WINDOW,
G_ADD_PRIVATE (GstGLWindowCocoa)
DEBUG_INIT);
static void
gst_gl_window_cocoa_class_init (GstGLWindowCocoaClass * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
GObjectClass *gobject_class = (GObjectClass *) klass;
window_class->open = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_open);
window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_close);
window_class->quit = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_quit);
window_class->get_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_get_window_handle);
window_class->set_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_set_window_handle);
window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_draw);
window_class->set_preferred_size =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_set_preferred_size);
window_class->show = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_show);
window_class->queue_resize = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_queue_resize);
window_class->send_message_async =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_send_message_async);
window_class->set_render_rectangle =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_set_render_rectangle);
window_class->controls_viewport =
GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_controls_viewport);
gobject_class->finalize = gst_gl_window_cocoa_finalize;
}
static void
gst_gl_window_cocoa_init (GstGLWindowCocoa * window)
{
window->priv = gst_gl_window_cocoa_get_instance_private (window);
window->priv->preferred_width = 320;
window->priv->preferred_height = 240;
#if OS_OBJECT_USE_OBJC
window->priv->gl_queue = (__bridge_retained gpointer)
(dispatch_queue_create ("org.freedesktop.gstreamer.glwindow", NULL));
#else
window->priv->gl_queue = (gpointer)
(dispatch_queue_create ("org.freedesktop.gstreamer.glwindow", NULL));
#endif
}
static void
gst_gl_window_cocoa_finalize (GObject * object)
{
GstGLWindowCocoa *window = GST_GL_WINDOW_COCOA (object);
#if OS_OBJECT_USE_OBJC
/* Let ARC clean up our queue */
dispatch_queue_t queue = (__bridge_transfer dispatch_queue_t) window->priv->gl_queue;
(void) queue;
#else
dispatch_release (window->priv->gl_queue);
#endif
window->priv->gl_queue = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
GstGLWindowCocoa *
gst_gl_window_cocoa_new (GstGLDisplay * display)
{
GstGLWindowCocoa *window;
if ((gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_COCOA) == 0)
/* we require an cocoa display to create CGL windows */
return NULL;
window = g_object_new (GST_TYPE_GL_WINDOW_COCOA, NULL);
gst_object_ref_sink (window);
return window;
}
/* Must be called from the main thread */
gboolean
gst_gl_window_cocoa_create_window (GstGLWindowCocoa *window_cocoa)
{
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLWindow *window = GST_GL_WINDOW (window_cocoa);
GstGLNSWindow *internal_win_id;
NSRect mainRect = [[NSScreen mainScreen] visibleFrame];
gint h = priv->preferred_height;
gint y = mainRect.size.height > h ? (mainRect.size.height - h) * 0.5 : 0;
NSRect rect = NSMakeRect (0, y, priv->preferred_width, priv->preferred_height);
NSRect windowRect = NSMakeRect (0, y, priv->preferred_width, priv->preferred_height);
GstGLContext *context = gst_gl_window_get_context (window);
GstGLCAOpenGLLayer *layer;
GstGLNSView *glView;
if (!context)
return FALSE;
layer = [[GstGLCAOpenGLLayer alloc] initWithGstGLWindow:window];
layer.autoresizingMask = kCALayerWidthSizable | kCALayerHeightSizable;
layer.needsDisplayOnBoundsChange = YES;
glView = [[GstGLNSView alloc] initWithFrameLayer:window_cocoa rect:windowRect layer:layer];
gst_object_unref (context);
internal_win_id = [[GstGLNSWindow alloc] initWithContentRect:rect styleMask:
(NSWindowStyleMaskTitled | NSWindowStyleMaskClosable |
NSWindowStyleMaskResizable | NSWindowStyleMaskMiniaturizable)
backing: NSBackingStoreBuffered defer: NO screen: nil gstWin: window_cocoa];
priv->internal_win_id = (__bridge_retained gpointer)internal_win_id;
priv->internal_view = (__bridge gpointer)glView;
GST_DEBUG ("NSWindow id: %"G_GUINTPTR_FORMAT, (guintptr) priv->internal_win_id);
[internal_win_id setContentView:glView];
g_atomic_int_set (&window_cocoa->priv->view_ready, 1);
/* Set the window handle for real now that the NSWindow has been created. */
if (priv->external_view)
gst_gl_window_cocoa_set_window_handle (window,
(guintptr) priv->external_view);
[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
return TRUE;
}
static gboolean
gst_gl_window_cocoa_open (GstGLWindow *window, GError **err)
{
return TRUE;
}
static void
_close_window (gpointer * data)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (data);
GstGLNSView *view =
(__bridge GstGLNSView *) window_cocoa->priv->internal_view;
[view removeFromSuperview];
CFBridgingRelease (window_cocoa->priv->internal_win_id);
CFBridgingRelease (window_cocoa->priv->internal_view);
window_cocoa->priv->internal_win_id = NULL;
window_cocoa->priv->internal_view = NULL;
}
static void
gst_gl_window_cocoa_close (GstGLWindow * window)
{
_gst_gl_invoke_on_main ((GstGLWindowCB) _close_window,
gst_object_ref (window), (GDestroyNotify) gst_object_unref);
}
static guintptr
gst_gl_window_cocoa_get_window_handle (GstGLWindow *window)
{
return (guintptr) GST_GL_WINDOW_COCOA (window)->priv->internal_win_id;
}
static void
gst_gl_window_cocoa_set_window_handle (GstGLWindow * window, guintptr handle)
{
GstGLWindowCocoa *window_cocoa;
GstGLWindowCocoaPrivate *priv;
window_cocoa = GST_GL_WINDOW_COCOA (window);
priv = window_cocoa->priv;
if (priv->internal_win_id) {
if (handle) {
priv->external_view = (gpointer)handle;
priv->visible = TRUE;
} else {
/* bring back our internal window */
priv->external_view = 0;
priv->visible = FALSE;
}
dispatch_async (dispatch_get_main_queue (), ^{
GstGLNSWindow *internal_win_id =
(__bridge GstGLNSWindow *)window_cocoa->priv->internal_win_id;
NSView *external_view =
(__bridge NSView *)window_cocoa->priv->external_view;
NSView *view = (__bridge NSView *)window_cocoa->priv->internal_view;
[internal_win_id orderOut:internal_win_id];
[external_view addSubview: view];
[external_view setAutoresizesSubviews: YES];
[view setFrame: [external_view bounds]];
[view setAutoresizingMask: NSViewWidthSizable|NSViewHeightSizable];
});
} else {
/* no internal window yet so delay it to the next drawing */
priv->external_view = (gpointer)handle;
priv->visible = FALSE;
}
}
static void
_show_window (gpointer data)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (data);
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSWindow *internal_win_id = (__bridge GstGLNSWindow *)priv->internal_win_id;
GST_DEBUG_OBJECT (window_cocoa, "make the window available\n");
[internal_win_id makeMainWindow];
[internal_win_id orderFrontRegardless];
[internal_win_id setViewsNeedDisplay:YES];
priv->visible = TRUE;
}
static void
gst_gl_window_cocoa_show (GstGLWindow * window)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (window);
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
if (!priv->visible) {
/* useful when set_window_handle is called before
* the internal NSWindow */
if (priv->external_view) {
gst_gl_window_cocoa_set_window_handle (window, (guintptr) priv->external_view);
priv->visible = TRUE;
return;
}
if (!priv->external_view && !priv->visible)
_gst_gl_invoke_on_main ((GstGLWindowCB) _show_window,
gst_object_ref (window), (GDestroyNotify) gst_object_unref);
}
}
static void
gst_gl_window_cocoa_queue_resize (GstGLWindow * window)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (window);
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSView *view = (__bridge GstGLNSView *)priv->internal_view;
if (!g_atomic_int_get (&window_cocoa->priv->view_ready))
return;
[view->layer queueResize];
}
static void
gst_gl_window_cocoa_draw (GstGLWindow * window)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (window);
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSView *view = (__bridge GstGLNSView *)priv->internal_view;
/* As the view is created asynchronously in the main thread we cannot know
* exactly when it will be ready to draw to */
if (!g_atomic_int_get (&window_cocoa->priv->view_ready))
return;
/* this redraws the GstGLCAOpenGLLayer which calls
* gst_gl_window_cocoa_draw_thread(). Use an explicit CATransaction since we
* don't know how often the main runloop is running.
*/
[CATransaction begin];
[view setNeedsDisplay:YES];
[CATransaction commit];
}
static void
gst_gl_window_cocoa_set_preferred_size (GstGLWindow * window, gint width,
gint height)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (window);
window_cocoa->priv->preferred_width = width;
window_cocoa->priv->preferred_height = height;
}
static void
gst_gl_cocoa_draw_cb (GstGLWindowCocoa *window_cocoa)
{
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSWindow *internal_win_id = (__bridge GstGLNSWindow *)priv->internal_win_id;
if (internal_win_id && ![internal_win_id isClosed]) {
GstGLWindow *window = GST_GL_WINDOW (window_cocoa);
/* draw opengl scene in the back buffer */
/* We do not need to change viewports like in other window implementations
* as the caopengllayer will take care of that for us. */
if (window->draw)
window->draw (window->draw_data);
}
}
static void
gst_gl_cocoa_resize_cb (GstGLNSView * view, guint width, guint height)
{
GstGLWindowCocoa *window_cocoa = view->window_cocoa;
GstGLWindow *window = GST_GL_WINDOW (window_cocoa);
GstGLContext *context = gst_gl_window_get_context (window);
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSWindow *internal_win_id = (__bridge GstGLNSWindow *)priv->internal_win_id;
if (internal_win_id && ![internal_win_id isClosed]) {
const GstGLFuncs *gl;
NSRect bounds = [view bounds];
NSRect visibleRect = [view visibleRect];
gint viewport_dim[4];
GstVideoRectangle viewport;
gl = context->gl_vtable;
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
bounds = [view convertRectToBacking:bounds];
visibleRect = [view convertRectToBacking:visibleRect];
#endif
/* don't use the default gst_gl_window_resize() as that will marshal through
* the GL thread. We are being called from the main thread by the
* caopengllayer */
if (window->resize)
window->resize (window->resize_data, width, height);
gl->GetIntegerv (GL_VIEWPORT, viewport_dim);
GST_DEBUG_OBJECT (window, "Window resized: bounds %lf %lf %lf %lf "
"visibleRect %lf %lf %lf %lf, "
"viewport dimensions %i %i %i %i",
bounds.origin.x, bounds.origin.y,
bounds.size.width, bounds.size.height,
visibleRect.origin.x, visibleRect.origin.y,
visibleRect.size.width, visibleRect.size.height,
viewport_dim[0], viewport_dim[1], viewport_dim[2],
viewport_dim[3]);
viewport.x = viewport_dim[0] - visibleRect.origin.x;
viewport.x = viewport_dim[1] - visibleRect.origin.y;
viewport.w = viewport_dim[2];
viewport.h = viewport_dim[3];
gl->Viewport (viewport.x, viewport.y, viewport.w, viewport.h);
}
gst_object_unref (context);
}
static void
gst_gl_window_cocoa_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy)
{
GstGLWindowCocoa *window_cocoa = (GstGLWindowCocoa *) window;
GstGLContext *context = gst_gl_window_get_context (window);
GstGLContext *unref_context = NULL;
GThread *thread = NULL;
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
#if OS_OBJECT_USE_OBJC
dispatch_queue_t gl_queue = (__bridge dispatch_queue_t)priv->gl_queue;
#else
dispatch_queue_t gl_queue = (dispatch_queue_t)priv->gl_queue;
#endif
if (context)
window_cocoa->priv->last_context = unref_context = context;
/* we may not have a context if we are shutting down */
if (!context && window_cocoa->priv->shutting_down) {
context = window_cocoa->priv->last_context;
window_cocoa->priv->shutting_down = FALSE;
}
g_return_if_fail (context != NULL);
thread = gst_gl_context_get_thread (context);
if (thread == g_thread_self()) {
/* this case happens for nested calls happening from inside the GCD queue */
callback (data);
if (destroy)
destroy (data);
if (unref_context)
gst_object_unref (unref_context);
} else {
dispatch_async (gl_queue, ^{
gst_gl_context_activate (context, TRUE);
if (unref_context)
gst_object_unref (unref_context);
callback (data);
if (destroy)
destroy (data);
});
}
if (thread)
g_thread_unref (thread);
}
static void
gst_gl_window_cocoa_quit (GstGLWindow * window)
{
GstGLWindowCocoa *window_cocoa = (GstGLWindowCocoa *) window;
window_cocoa->priv->shutting_down = TRUE;
GST_GL_WINDOW_CLASS (parent_class)->quit (window);
}
struct SetRenderRectangle
{
GstGLWindowCocoa *window_cocoa;
GstVideoRectangle rect;
};
static void
_free_set_render_rectangle (struct SetRenderRectangle *render)
{
if (render) {
if (render->window_cocoa) {
gst_object_unref (render->window_cocoa);
}
g_free (render);
}
}
static void
_set_render_rectangle (gpointer data)
{
struct SetRenderRectangle *render = data;
GstGLWindowCocoaPrivate *priv = render->window_cocoa->priv;
GstGLNSView *view = (__bridge GstGLNSView *)priv->internal_view;
GST_LOG_OBJECT (render->window_cocoa, "setting render rectangle %i,%i+%ix%i",
render->rect.x, render->rect.y, render->rect.w, render->rect.h);
if (!g_atomic_int_get (&render->window_cocoa->priv->view_ready)) {
return;
}
NSRect newMainViewFrame = NSMakeRect(render->rect.x,
render->rect.y,
render->rect.w,
render->rect.h);
[view.superview setFrame:newMainViewFrame];
[view setFrame: view.superview.bounds];
[CATransaction begin];
[view setNeedsDisplay:YES];
[CATransaction commit];
}
static gboolean
gst_gl_window_cocoa_set_render_rectangle (GstGLWindow * window, gint x, gint y, gint width, gint height)
{
GstGLWindowCocoa *window_cocoa = (GstGLWindowCocoa *) window;
struct SetRenderRectangle *render;
render = g_new0 (struct SetRenderRectangle, 1);
render->window_cocoa = gst_object_ref (window_cocoa);
render->rect.x = x;
render->rect.y = y;
render->rect.w = width;
render->rect.h = height;
_gst_gl_invoke_on_main ((GstGLWindowCB) _set_render_rectangle, render,
(GDestroyNotify) _free_set_render_rectangle);
return TRUE;
}
static gboolean
gst_gl_window_cocoa_controls_viewport (GstGLWindow * window)
{
return TRUE;
}
/* =============================================================*/
/* */
/* GstGLNSWindow implementation */
/* */
/* =============================================================*/
/* Must be called from the main thread */
@implementation GstGLNSWindow
- (id) initWithContentRect: (NSRect) contentRect
styleMask: (unsigned int) styleMask
backing: (NSBackingStoreType) bufferingType
defer: (BOOL) flag screen: (NSScreen *) aScreen
gstWin: (GstGLWindowCocoa *) cocoa {
m_isClosed = NO;
window_cocoa = cocoa;
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSWindow *internal_win_id = (__bridge GstGLNSWindow *)priv->internal_win_id;
self = [super initWithContentRect: contentRect
styleMask: styleMask backing: bufferingType
defer: flag screen:aScreen];
[self setReleasedWhenClosed:NO];
GST_DEBUG ("initializing GstGLNSWindow\n");
[self setTitle:@"OpenGL renderer"];
[self setBackgroundColor:[NSColor blackColor]];
[self orderOut:internal_win_id];
return self;
}
- (void) setClosed {
m_isClosed = YES;
}
- (BOOL) isClosed {
return m_isClosed;
}
- (BOOL) canBecomeMainWindow {
return YES;
}
- (BOOL) canBecomeKeyWindow {
return YES;
}
static void
close_window_cb (gpointer data)
{
GstGLWindowCocoa *window_cocoa = data;
GstGLWindow *window;
window = GST_GL_WINDOW (window_cocoa);
if (window->close) {
window->close (window->close_data);
}
}
/* Called in the main thread which is never the gl thread */
- (BOOL) windowShouldClose:(id)sender {
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSWindow *internal_win_id = (__bridge GstGLNSWindow *)priv->internal_win_id;
GST_DEBUG ("user clicked the close button\n");
[internal_win_id setClosed];
gst_gl_window_send_message_async (GST_GL_WINDOW (window_cocoa),
(GstGLWindowCB) close_window_cb, gst_object_ref (window_cocoa),
(GDestroyNotify) gst_object_unref);
return YES;
}
@end
/* =============================================================*/
/* */
/* GstGLNSView implementation */
/* */
/* =============================================================*/
@implementation GstGLNSView
/* Must be called from the application main thread */
- (id)initWithFrameLayer:(GstGLWindowCocoa *)window rect:(NSRect)contentRect layer:(CALayer *)layerContent {
self = [super initWithFrame: contentRect];
window_cocoa = window;
/* The order of the next two calls matters. This creates a layer-hosted
* NSView. Calling setWantsLayer before setLayer will create a
* layer-backed NSView. See the apple developer documentation on the
* difference.
*/
[self setLayer:layerContent];
[self setWantsLayer:YES];
self->layer = (GstGLCAOpenGLLayer *)layerContent;
[self->layer setDrawCallback:(GstGLWindowCB)gst_gl_cocoa_draw_cb
data:window notify:NULL];
[self->layer setResizeCallback:(GstGLWindowResizeCB)gst_gl_cocoa_resize_cb
data:(__bridge_retained gpointer)self notify:(GDestroyNotify)CFRelease];
[self setLayerContentsRedrawPolicy:NSViewLayerContentsRedrawOnSetNeedsDisplay];
[self setWantsBestResolutionOpenGLSurface:YES];
return self;
}
- (void) dealloc {
self->layer = nil;
}
- (void)renewGState {
/* Don't update the screen until we redraw, this
* prevents flickering during scrolling, clipping,
* resizing, etc
*/
[[self window] disableScreenUpdatesUntilFlush];
[super renewGState];
}
- (BOOL) isOpaque {
return YES;
}
- (BOOL) isFlipped {
return NO;
}
@end
void
_gst_gl_invoke_on_main (GstGLWindowCB func, gpointer data, GDestroyNotify notify)
{
if ([NSThread isMainThread]) {
func (data);
if (notify)
notify (data);
} else {
dispatch_async (dispatch_get_main_queue (), ^{
func (data);
if (notify)
notify (data);
});
}
}