/**

  * $Id$

  *

  * Cocoa (NSOpenGL) video driver

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * This program is free software; you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation; either version 2 of the License, or

  * (at your option) any later version.

  *

  * This program 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 General Public License for more details.

  */

 #include <AppKit/NSOpenGL.h>

 #include <Foundation/NSAutoreleasePool.h>

 #include "drivers/video_nsgl.h"

 #include "drivers/video_gl.h"

 #include "pvr2/glutil.h"

 static NSOpenGLContext *nsgl_context = nil;

 gboolean video_nsgl_init_driver( NSView *view, display_driver_t driver )

 {

     NSAutoreleasePool *pool = [NSAutoreleasePool new];

     NSOpenGLPixelFormatAttribute attributes[] = {

             NSOpenGLPFAWindow,

             // NSOpenGLPFADoubleBuffer,

             NSOpenGLPFADepthSize, (NSOpenGLPixelFormatAttribute)24,

             (NSOpenGLPixelFormatAttribute)nil };

     NSOpenGLPixelFormat *pixelFormat = 

         [[[NSOpenGLPixelFormat alloc] initWithAttributes: attributes] autorelease];

     nsgl_context = 

         [[NSOpenGLContext alloc] initWithFormat: pixelFormat shareContext: nil];

     [nsgl_context setView: view];

     [nsgl_context makeCurrentContext];

     [pool release];

     driver->swap_buffers = video_nsgl_swap_buffers;

     driver->capabilities.has_gl = TRUE;

     if( gl_fbo_is_supported() ) {

         gl_fbo_init(driver);

     } else {

         /* Note there is a 'native' buffer framework, but since all current

          * Apple drivers appear to support FBO, there's not much point in

          * doing the work to support them.

          */

         ERROR( "FBO not supported" );

         return FALSE;

     }

     return TRUE;

 }

 void video_nsgl_update()

 {

     if( nsgl_context != nil ) {

         [nsgl_context update];

     }

 }

 void video_nsgl_make_current()

 {

     if( nsgl_context != nil ) {

         [nsgl_context makeCurrentContext];

     }

 }

 void video_nsgl_swap_buffers()

 {

     if( nsgl_context != nil ) {

         [nsgl_context flushBuffer];

     }

 }

 void video_nsgl_shutdown()

 {

     if( nsgl_context != nil ) {

         [NSOpenGLContext clearCurrentContext];

         [nsgl_context release];

         nsgl_context = nil;

     }

 }