/**

 * $Id$

 *

 * 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;

    }

}