gstreamer/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
#include <Cocoa/Cocoa.h>
#include <QuartzCore/QuartzCore.h>
#include "gstgl_cocoa_private.h"
/* =============================================================*/
/* */
/* 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_GL_WINDOW_COCOA_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_TYPE_GL_WINDOW_COCOA, GstGLWindowCocoaPrivate))
#define GST_CAT_DEFAULT gst_gl_window_cocoa_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#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, DEBUG_INIT);
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 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);
struct _GstGLWindowCocoaPrivate
{
gpointer internal_win_id;
gpointer external_view;
gboolean visible;
gint preferred_width;
gint preferred_height;
GLint viewport_dim[4];
/* atomic set when the internal NSView has been created */
int view_ready;
gpointer gl_queue;
};
static void
gst_gl_window_cocoa_class_init (GstGLWindowCocoaClass * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
GObjectClass *gobject_class = (GObjectClass *) klass;
g_type_class_add_private (klass, sizeof (GstGLWindowCocoaPrivate));
window_class->open = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_open);
window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_cocoa_close);
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);
gobject_class->finalize = gst_gl_window_cocoa_finalize;
}
static void
gst_gl_window_cocoa_init (GstGLWindowCocoa * window)
{
window->priv = GST_GL_WINDOW_COCOA_GET_PRIVATE (window);
window->priv->preferred_width = 320;
window->priv->preferred_height = 240;
window->priv->gl_queue = (__bridge_retained gpointer)
(dispatch_queue_create ("org.freedesktop.gstreamer.glwindow", NULL));
}
static void
gst_gl_window_cocoa_finalize (GObject * object)
{
GstGLWindowCocoa *window = GST_GL_WINDOW_COCOA (object);
window->priv->gl_queue = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
GstGLWindowCocoa *
gst_gl_window_cocoa_new (GstGLDisplay * display)
{
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;
return g_object_new (GST_TYPE_GL_WINDOW_COCOA, NULL);
}
/* 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);
GstGLContextCocoa *context_cocoa = GST_GL_CONTEXT_COCOA (context);
GstGLCAOpenGLLayer *layer = [[GstGLCAOpenGLLayer alloc] initWithGstGLContext:context_cocoa];
GstGLNSView *glView = [[GstGLNSView alloc] initWithFrameLayer:window_cocoa rect:windowRect layer:layer];
gst_object_unref (context);
internal_win_id = [[GstGLNSWindow alloc] initWithContentRect:rect styleMask:
(NSTitledWindowMask | NSClosableWindowMask |
NSResizableWindowMask | NSMiniaturizableWindowMask)
backing: NSBackingStoreBuffered defer: NO screen: nil gstWin: window_cocoa];
priv->internal_win_id = (__bridge_retained gpointer)internal_win_id;
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);
return TRUE;
}
static gboolean
gst_gl_window_cocoa_open (GstGLWindow *window, GError **err)
{
GstGLWindowCocoa *window_cocoa;
window_cocoa = GST_GL_WINDOW_COCOA (window);
return TRUE;
}
static void
gst_gl_window_cocoa_close (GstGLWindow *window)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (window);
GstGLNSWindow *internal_win_id = (__bridge GstGLNSWindow *)window_cocoa->priv->internal_win_id;
[[internal_win_id contentView] removeFromSuperview];
CFBridgingRelease(window_cocoa->priv->internal_win_id);
window_cocoa->priv->internal_win_id = NULL;
}
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 = [internal_win_id contentView];
[internal_win_id orderOut:internal_win_id];
[external_view addSubview: view];
[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)
_invoke_on_main ((GstGLWindowCB) _show_window, window);
}
}
static void
gst_gl_window_cocoa_queue_resize (GstGLWindow * window)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (window);
GstGLNSView *view;
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSWindow *internal_win_id = (__bridge GstGLNSWindow *)priv->internal_win_id;
if (!g_atomic_int_get (&window_cocoa->priv->view_ready))
return;
view = (GstGLNSView *)[internal_win_id contentView];
[view->layer queueResize];
}
static void
gst_gl_window_cocoa_draw (GstGLWindow * window)
{
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (window);
GstGLNSView *view;
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
GstGLNSWindow *internal_win_id = (__bridge GstGLNSWindow *)priv->internal_win_id;
/* 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;
view = (GstGLNSView *)[internal_win_id contentView];
/* 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 */
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];
gl = context->gl_vtable;
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
bounds = [view convertRectToBacking:bounds];
visibleRect = [view convertRectToBacking:visibleRect];
#endif
GST_DEBUG_OBJECT (window, "Window resized: bounds %lf %lf %lf %lf "
"visibleRect %lf %lf %lf %lf",
bounds.origin.x, bounds.origin.y,
bounds.size.width, bounds.size.height,
visibleRect.origin.x, visibleRect.origin.y,
visibleRect.size.width, visibleRect.size.height);
gst_gl_window_resize (window, width, height);
gl->GetIntegerv (GL_VIEWPORT, viewport_dim);
gl->Viewport (viewport_dim[0] - visibleRect.origin.x,
viewport_dim[1] - visibleRect.origin.y,
viewport_dim[2], viewport_dim[3]);
}
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);
GThread *thread = gst_gl_context_get_thread (context);
GstGLWindowCocoaPrivate *priv = window_cocoa->priv;
dispatch_queue_t gl_queue = (__bridge dispatch_queue_t)priv->gl_queue;
if (thread == g_thread_self()) {
/* this case happens for nested calls happening from inside the GCD queue */
callback (data);
if (destroy)
destroy (data);
gst_object_unref (context);
} else {
dispatch_async (gl_queue, ^{
gst_gl_context_activate (context, TRUE);
gst_object_unref (context);
callback (data);
if (destroy)
destroy (data);
});
}
if (thread)
g_thread_unref (thread);
}
/* =============================================================*/
/* */
/* 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
_invoke_on_main (GstGLWindowCB func, gpointer data)
{
if ([NSThread isMainThread]) {
func (data);
} else {
dispatch_async (dispatch_get_main_queue (), ^{
func (data);
});
}
}