git.sesse.net Git - vlc/blob - modules/gui/macosx/voutgl.m

   1 /*****************************************************************************
   2  * voutgl.m: MacOS X OpenGL provider
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004 the VideoLAN team
   5  * $Id: vout.m 8351 2004-08-02 13:06:38Z hartman $
   6  *
   7  * Authors: Colin Delacroix <colin@zoy.org>
   8  *          Florian G. Pflug <fgp@phlo.org>
   9  *          Jon Lech Johansen <jon-vl@nanocrew.net>
  10  *          Derk-Jan Hartman <hartman at videolan dot org>
  11  *          Eric Petit <titer@m0k.org>
  12  *          Benjamin Pracht <bigben at videolan dot org>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  27  *****************************************************************************/
  28
  29 /*****************************************************************************
  30  * Preamble
  31  *****************************************************************************/
  32 #include <errno.h>                                                 /* ENOMEM */
  33 #include <stdlib.h>                                                /* free() */
  34 #include <string.h>                                            /* strerror() */
  35
  36 #include <vlc_keys.h>
  37
  38 #include "intf.h"
  39 #include "vout.h"
  40
  41 #include <OpenGL/OpenGL.h>
  42 #include <OpenGL/gl.h>
  43
  44 /*****************************************************************************
  45  * VLCView interface
  46  *****************************************************************************/
  47 @interface VLCGLView : NSOpenGLView
  48 {
  49     vout_thread_t * p_vout;
  50 }
  51
  52 - (id) initWithVout: (vout_thread_t *) p_vout;
  53 @end
  54
  55 struct vout_sys_t
  56 {
  57     NSAutoreleasePool * o_pool;
  58     VLCGLView         * o_glview;
  59     VLCVoutView       * o_vout_view;
  60     vlc_bool_t          b_saved_frame;
  61     NSRect              s_frame;
  62     vlc_bool_t          b_got_frame;
  63     vlc_mutex_t         lock;
  64 };
  65
  66 /*****************************************************************************
  67  * Local prototypes
  68  *****************************************************************************/
  69
  70 static int  Init   ( vout_thread_t * p_vout );
  71 static void End    ( vout_thread_t * p_vout );
  72 static int  Manage ( vout_thread_t * p_vout );
  73 static int  Control( vout_thread_t *, int, va_list );
  74 static void Swap   ( vout_thread_t * p_vout );
  75 static int  Lock   ( vout_thread_t * p_vout );
  76 static void Unlock ( vout_thread_t * p_vout );
  77
  78 int E_(OpenVideoGL)  ( vlc_object_t * p_this )
  79 {
  80     vout_thread_t * p_vout = (vout_thread_t *) p_this;
  81
  82     if( !CGDisplayUsesOpenGLAcceleration( kCGDirectMainDisplay ) )
  83     {
  84         msg_Warn( p_vout, "no OpenGL hardware acceleration found. "
  85                           "Video display will be slow" );
  86         return( 1 );
  87     }
  88     msg_Dbg( p_vout, "display is Quartz Extreme accelerated" );
  89
  90     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  91     if( p_vout->p_sys == NULL )
  92     {
  93         msg_Err( p_vout, "out of memory" );
  94         return( 1 );
  95     }
  96
  97     memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
  98
  99     p_vout->p_sys->o_pool = [[NSAutoreleasePool alloc] init];
 100     vlc_mutex_init( p_vout, &p_vout->p_sys->lock );
 101
 102     /* Create the GL view */
 103     p_vout->p_sys->o_glview = [[VLCGLView alloc] initWithVout: p_vout];
 104     [p_vout->p_sys->o_glview autorelease];
 105
 106     /* Spawn the window */
 107
 108     if( !(p_vout->p_sys->o_vout_view = [VLCVoutView getVoutView: p_vout
 109                     subView: p_vout->p_sys->o_glview frame: nil]) )
 110     {
 111         return VLC_EGENERIC;
 112     }
 113
 114     p_vout->p_sys->b_got_frame = VLC_FALSE;
 115
 116     p_vout->pf_init   = Init;
 117     p_vout->pf_end    = End;
 118     p_vout->pf_manage = Manage;
 119     p_vout->pf_control= Control;
 120     p_vout->pf_swap   = Swap;
 121     p_vout->pf_lock   = Lock;
 122     p_vout->pf_unlock = Unlock;
 123
 124     return VLC_SUCCESS;
 125 }
 126
 127 void E_(CloseVideoGL) ( vlc_object_t * p_this )
 128 {
 129     vout_thread_t * p_vout = (vout_thread_t *) p_this;
 130     NSAutoreleasePool *o_pool = [[NSAutoreleasePool alloc] init];
 131
 132     /* Close the window */
 133     [p_vout->p_sys->o_vout_view closeVout];
 134
 135     /* Clean up */
 136     vlc_mutex_destroy( &p_vout->p_sys->lock );
 137     [o_pool release];
 138     free( p_vout->p_sys );
 139 }
 140
 141 static int Init( vout_thread_t * p_vout )
 142 {
 143     [[p_vout->p_sys->o_glview openGLContext] makeCurrentContext];
 144     return VLC_SUCCESS;
 145 }
 146
 147 static void End( vout_thread_t * p_vout )
 148 {
 149     [[p_vout->p_sys->o_glview openGLContext] makeCurrentContext];
 150 }
 151
 152 static int Manage( vout_thread_t * p_vout )
 153 {
 154     if( p_vout->i_changes & VOUT_ASPECT_CHANGE )
 155     {
 156         [p_vout->p_sys->o_glview reshape];
 157         p_vout->i_changes &= ~VOUT_ASPECT_CHANGE;
 158     }
 159     if( p_vout->i_changes & VOUT_CROP_CHANGE )
 160     {
 161         [p_vout->p_sys->o_glview reshape];
 162         p_vout->i_changes &= ~VOUT_CROP_CHANGE;
 163     }
 164
 165     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 166     {
 167         NSAutoreleasePool *o_pool = [[NSAutoreleasePool alloc] init];
 168
 169         if( !p_vout->b_fullscreen )
 170         {
 171             /* Save window size and position */
 172             p_vout->p_sys->s_frame.size =
 173                 [p_vout->p_sys->o_vout_view frame].size;
 174             p_vout->p_sys->s_frame.origin =
 175                 [[p_vout->p_sys->o_vout_view getWindow ]frame].origin;
 176             p_vout->p_sys->b_saved_frame = VLC_TRUE;
 177         }
 178         [p_vout->p_sys->o_vout_view closeVout];
 179
 180         p_vout->b_fullscreen = !p_vout->b_fullscreen;
 181
 182 #define o_glview p_vout->p_sys->o_glview
 183         o_glview = [[VLCGLView alloc] initWithVout: p_vout];
 184         [o_glview autorelease];
 185
 186         if( p_vout->p_sys->b_saved_frame )
 187         {
 188             p_vout->p_sys->o_vout_view = [VLCVoutView getVoutView: p_vout
 189                         subView: o_glview
 190                         frame: &p_vout->p_sys->s_frame];
 191         }
 192         else
 193         {
 194             p_vout->p_sys->o_vout_view = [VLCVoutView getVoutView: p_vout
 195                         subView: o_glview frame: nil];
 196
 197         }
 198
 199         [[o_glview openGLContext] makeCurrentContext];
 200 #undef o_glview
 201
 202         [o_pool release];
 203
 204         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 205     }
 206
 207     [p_vout->p_sys->o_vout_view manage];
 208     return VLC_SUCCESS;
 209 }
 210
 211 /*****************************************************************************
 212  * Control: control facility for the vout
 213  *****************************************************************************/
 214 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 215 {
 216     vlc_bool_t b_arg;
 217
 218     switch( i_query )
 219     {
 220         case VOUT_SET_STAY_ON_TOP:
 221             b_arg = va_arg( args, vlc_bool_t );
 222             [p_vout->p_sys->o_vout_view setOnTop: b_arg];
 223             return VLC_SUCCESS;
 224
 225         case VOUT_CLOSE:
 226         case VOUT_REPARENT:
 227         default:
 228             return vout_vaControlDefault( p_vout, i_query, args );
 229     }
 230 }
 231
 232 static void Swap( vout_thread_t * p_vout )
 233 {
 234     p_vout->p_sys->b_got_frame = VLC_TRUE;
 235     [[p_vout->p_sys->o_glview openGLContext] makeCurrentContext];
 236     glFlush();
 237 }
 238
 239 static int Lock( vout_thread_t * p_vout )
 240 {
 241     vlc_mutex_lock( &p_vout->p_sys->lock );
 242     return 0;
 243 }
 244
 245 static void Unlock( vout_thread_t * p_vout )
 246 {
 247     vlc_mutex_unlock( &p_vout->p_sys->lock );
 248 }
 249
 250 /*****************************************************************************
 251  * VLCGLView implementation
 252  *****************************************************************************/
 253 @implementation VLCGLView
 254
 255 - (id) initWithVout: (vout_thread_t *) vout
 256 {
 257     p_vout = vout;
 258
 259     NSOpenGLPixelFormatAttribute attribs[] =
 260     {
 261         NSOpenGLPFAAccelerated,
 262         NSOpenGLPFANoRecovery,
 263         NSOpenGLPFAColorSize, 24,
 264         NSOpenGLPFAAlphaSize, 8,
 265         NSOpenGLPFADepthSize, 24,
 266         NSOpenGLPFAWindow,
 267         0
 268     };
 269
 270     NSOpenGLPixelFormat * fmt = [[NSOpenGLPixelFormat alloc]
 271         initWithAttributes: attribs];
 272
 273     if( !fmt )
 274     {
 275         msg_Warn( p_vout, "could not create OpenGL video output" );
 276         return nil;
 277     }
 278
 279     self = [super initWithFrame: NSMakeRect(0,0,10,10) pixelFormat: fmt];
 280     [fmt release];
 281
 282     [[self openGLContext] makeCurrentContext];
 283     [[self openGLContext] update];
 284
 285     /* Swap buffers only during the vertical retrace of the monitor.
 286        http://developer.apple.com/documentation/GraphicsImaging/
 287        Conceptual/OpenGL/chap5/chapter_5_section_44.html */
 288     long params[] = { 1 };
 289     CGLSetParameter( CGLGetCurrentContext(), kCGLCPSwapInterval,
 290                      params );
 291     return self;
 292 }
 293
 294 - (void) reshape
 295 {
 296     int x, y;
 297     vlc_value_t val;
 298
 299     Lock( p_vout );
 300     NSRect bounds = [self bounds];
 301
 302     [[self openGLContext] makeCurrentContext];
 303
 304     var_Get( p_vout, "macosx-stretch", &val );
 305     if( val.b_bool )
 306     {
 307         x = bounds.size.width;
 308         y = bounds.size.height;
 309     }
 310     else if( bounds.size.height * p_vout->fmt_in.i_visible_width *
 311              p_vout->fmt_in.i_sar_num <
 312              bounds.size.width * p_vout->fmt_in.i_visible_height *
 313              p_vout->fmt_in.i_sar_den )
 314     {
 315         x = ( bounds.size.height * p_vout->fmt_in.i_visible_width *
 316               p_vout->fmt_in.i_sar_num ) /
 317             ( p_vout->fmt_in.i_visible_height * p_vout->fmt_in.i_sar_den);
 318
 319         y = bounds.size.height;
 320     }
 321     else
 322     {
 323         x = bounds.size.width;
 324         y = ( bounds.size.width * p_vout->fmt_in.i_visible_height *
 325               p_vout->fmt_in.i_sar_den) /
 326             ( p_vout->fmt_in.i_visible_width * p_vout->fmt_in.i_sar_num  );
 327     }
 328
 329     glViewport( ( bounds.size.width - x ) / 2,
 330                 ( bounds.size.height - y ) / 2, x, y );
 331
 332     if( p_vout->p_sys->b_got_frame )
 333     {
 334         /* Ask the opengl module to redraw */
 335         vout_thread_t * p_parent;
 336         p_parent = (vout_thread_t *) p_vout->p_parent;
 337         Unlock( p_vout );
 338         if( p_parent && p_parent->pf_display )
 339         {
 340             p_parent->pf_display( p_parent, NULL );
 341         }
 342     }
 343     else
 344     {
 345         glClear( GL_COLOR_BUFFER_BIT );
 346         Unlock( p_vout );
 347     }
 348     [super reshape];
 349 }
 350
 351 - (void) update
 352 {
 353     Lock( p_vout );
 354     [super update];
 355     Unlock( p_vout );
 356 }
 357
 358 - (void) drawRect: (NSRect) rect
 359 {
 360     Lock( p_vout );
 361     [[self openGLContext] makeCurrentContext];
 362     glFlush();
 363     [super drawRect:rect];
 364     Unlock( p_vout );
 365 }
 366
 367 @end
 368
 369