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/*
* GStreamer
* Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under 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
* 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 "gstglcontext_cocoa.h"
#include "gstgl_cocoa_private.h"
static gboolean gst_gl_context_cocoa_create_context (GstGLContext *context, GstGLAPI gl_api,
GstGLContext * other_context, GError **error);
static guintptr gst_gl_context_cocoa_get_gl_context (GstGLContext * window);
static gboolean gst_gl_context_cocoa_activate (GstGLContext * context, gboolean activate);
static GstGLAPI gst_gl_context_cocoa_get_gl_api (GstGLContext * context);
#define GST_GL_CONTEXT_COCOA_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_CONTEXT_COCOA, GstGLContextCocoaPrivate))
G_DEFINE_TYPE (GstGLContextCocoa, gst_gl_context_cocoa, GST_GL_TYPE_CONTEXT);
static void
gst_gl_context_cocoa_class_init (GstGLContextCocoaClass * klass)
{
GstGLContextClass *context_class;
#ifndef GNUSTEP
NSAutoreleasePool* pool = nil;
#endif
context_class = (GstGLContextClass *) klass;
g_type_class_add_private (klass, sizeof (GstGLContextCocoaPrivate));
context_class->create_context =
GST_DEBUG_FUNCPTR (gst_gl_context_cocoa_create_context);
context_class->get_gl_context =
GST_DEBUG_FUNCPTR (gst_gl_context_cocoa_get_gl_context);
context_class->activate = GST_DEBUG_FUNCPTR (gst_gl_context_cocoa_activate);
context_class->get_gl_api =
GST_DEBUG_FUNCPTR (gst_gl_context_cocoa_get_gl_api);
#ifndef GNUSTEP
pool = [[NSAutoreleasePool alloc] init];
[NSApplication sharedApplication];
[pool release];
#endif
}
static void
gst_gl_context_cocoa_init (GstGLContextCocoa * context)
{
context->priv = GST_GL_CONTEXT_COCOA_GET_PRIVATE (context);
}
/* Must be called in the gl thread */
GstGLContextCocoa *
gst_gl_context_cocoa_new (void)
{
GstGLContextCocoa *context = g_object_new (GST_GL_TYPE_CONTEXT_COCOA, NULL);
return context;
}
static gboolean
gst_gl_context_cocoa_create_context (GstGLContext *context, GstGLAPI gl_api,
GstGLContext *other_context, GError **error)
{
GstGLContextCocoa *context_cocoa = GST_GL_CONTEXT_COCOA (context);
GstGLContextCocoaPrivate *priv = context_cocoa->priv;
GstGLWindow *window = gst_gl_context_get_window (context);
GstGLWindowCocoa *window_cocoa = GST_GL_WINDOW_COCOA (window);
GstGLNSOpenGLView *glView = nil;
NSWindow *window_handle;
NSRect rect;
NSAutoreleasePool *pool;
NSOpenGLPixelFormat *fmt = nil;
NSOpenGLContext *glContext = nil;
NSOpenGLPixelFormatAttribute attribs[] = {
NSOpenGLPFADoubleBuffer,
NSOpenGLPFAAccumSize, 32,
0
};
priv->gl_context = nil;
if (other_context)
priv->external_gl_context = (NSOpenGLContext *) gst_gl_context_get_gl_context (other_context);
else
priv->external_gl_context = NULL;
GSRegisterCurrentThread();
pool = [[NSAutoreleasePool alloc] init];
#ifdef GNUSTEP
[NSApplication sharedApplication];
#endif
rect.origin.x = 0;
rect.origin.y = 0;
rect.size.width = 320;
rect.size.height = 240;
priv->rect = rect;
gst_gl_window_cocoa_create_window (window_cocoa);
window_handle = (NSWindow *) gst_gl_window_get_window_handle (window);
glView = [GstGLNSOpenGLView alloc];
fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs];
if (!fmt) {
gst_object_unref (window);
GST_WARNING ("cannot create NSOpenGLPixelFormat");
return FALSE;
}
glView = [glView initWithFrame:window_cocoa rect:rect pixelFormat:fmt];
[window_handle setContentView:glView];
#ifndef GNUSTEP
glContext = [[NSOpenGLContext alloc] initWithFormat:fmt
shareContext:context_cocoa->priv->external_gl_context];
GST_DEBUG ("NSOpenGL context created: %lud\n", (guintptr) glContext);
context_cocoa->priv->gl_context = glContext;
[glView setOpenGLContext:glContext];
#else
/* FIXME try to make context sharing work in GNUstep */
context_cocoa->priv->gl_context = [glView openGLContext];
#endif
/* OpenGL context is made current only one time threre.
* Indeed, all OpenGL calls are made in only one thread,
* the Application thread */
[glContext makeCurrentContext];
[glContext update];
/* Back and front buffers are swapped only during the vertical retrace of the monitor.
* Discarded if you configured your driver to Never-use-V-Sync.
*/
NS_DURING {
if (glContext) {
#ifdef GNUSTEP
const long swapInterval = 1;
#else
const GLint swapInterval = 1;
#endif
[[glView openGLContext] setValues:&swapInterval forParameter:NSOpenGLCPSwapInterval];
}
} NS_HANDLER {
GST_DEBUG ("your back-end does not implement NSOpenglContext::setValues\n");
}
NS_ENDHANDLER
GST_DEBUG ("opengl GstGLNSWindow initialized: %d x %d\n",
(gint) rect.size.width, (gint) rect.size.height);
[pool release];
#ifndef GNUSTEP
priv->source_id = g_timeout_add_seconds (1, gst_gl_window_cocoa_nsapp_iteration, NULL);
#endif
gst_object_unref (window);
return TRUE;
}
static guintptr
gst_gl_context_cocoa_get_gl_context (GstGLContext * context)
{
return (guintptr) GST_GL_CONTEXT_COCOA (context)->priv->gl_context;
}
static gboolean
gst_gl_context_cocoa_activate (GstGLContext * context, gboolean activate)
{
GstGLContextCocoa *context_cocoa;
context_cocoa = GST_GL_CONTEXT_COCOA (context);
if (activate)
[context_cocoa->priv->gl_context makeCurrentContext];
#if 0
else
/* FIXME */
[context_cocoa->priv->gl_context clearCurrentContext];
#endif
return TRUE;
}
static GstGLAPI
gst_gl_context_cocoa_get_gl_api (GstGLContext * context)
{
return GST_GL_API_OPENGL;
}
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