git.sesse.net Git - vlc/blob - modules/gui/minimal_macosx/VLCOpenGLVoutView.m

   1 /*****************************************************************************
   2  * VLCOpenGLVoutView.m: MacOS X OpenGL provider
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004 the VideoLAN team
   5  * $Id$
   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  *          Damien Fouilleul <damienf at videolan dot org>
  14  *          Pierr d'Herbemont <pdherbemont at videolan dot org>
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  29  *****************************************************************************/
  30
  31 /*****************************************************************************
  32  * Preamble
  33  *****************************************************************************/
  34 #include "intf.h"
  35 #include "voutgl.h"
  36 #include "VLCOpenGLVoutView.h"
  37 #include "VLCMinimalVoutWindow.h"
  38
  39 #include <OpenGL/OpenGL.h>
  40 #include <OpenGL/gl.h>
  41
  42 /*****************************************************************************
  43  * cocoaglvoutviewInit
  44  *****************************************************************************/
  45 int cocoaglvoutviewInit( vout_thread_t * p_vout )
  46 {
  47     vlc_value_t value_drawable;
  48     id <VLCOpenGLVoutEmbedding> o_cocoaglview_container;
  49
  50     msg_Dbg( p_vout, "Mac OS X Vout is opening" );
  51
  52     var_Create( p_vout, "drawable", VLC_VAR_DOINHERIT );
  53     var_Get( p_vout, "drawable", &value_drawable );
  54
  55     o_cocoaglview_container = (id) value_drawable.i_int;
  56     if (!o_cocoaglview_container)
  57     {
  58         msg_Warn( p_vout, "No drawable!, spawing a window" );
  59         o_cocoaglview_container = [[VLCMinimalVoutWindow alloc] initWithContentRect: NSMakeRect( 0, 0, 200, 200 )];
  60     }
  61
  62     p_vout->p_sys->b_embedded = VLC_FALSE;
  63
  64     p_vout->p_sys->o_pool = [[NSAutoreleasePool alloc] init];
  65
  66     /* Create the GL view */
  67     struct args { vout_thread_t * p_vout; id <VLCOpenGLVoutEmbedding> container; } args = { p_vout, o_cocoaglview_container };
  68
  69     [VLCOpenGLVoutView performSelectorOnMainThread:@selector(autoinitOpenGLVoutViewIntVoutWithContainer:)
  70                         withObject:[NSData dataWithBytes: &args length: sizeof(struct args)] waitUntilDone:YES];
  71
  72     [[p_vout->p_sys->o_glview openGLContext] makeCurrentContext];
  73     return VLC_SUCCESS;
  74 }
  75
  76 /*****************************************************************************
  77  * cocoaglvoutviewEnd
  78  *****************************************************************************/
  79 void cocoaglvoutviewEnd( vout_thread_t * p_vout )
  80 {
  81     id <VLCOpenGLVoutEmbedding> o_cocoaglview_container;
  82
  83     msg_Dbg( p_vout, "Mac OS X Vout is closing" );
  84     var_Destroy( p_vout, "drawable" );
  85
  86     o_cocoaglview_container = [p_vout->p_sys->o_glview container];
  87
  88     /* Make sure our view won't request the vout now */
  89     [p_vout->p_sys->o_glview detachFromVout];
  90     msg_Dbg( p_vout, "Mac OS X Vout is closing" );
  91
  92     /* Let the view go, _without_blocking_ */
  93     [p_vout->p_sys->o_glview performSelectorOnMainThread:@selector(removeFromSuperview) withObject:NULL waitUntilDone:NO];
  94
  95     if( [(id)o_cocoaglview_container respondsToSelector:@selector(removeVoutSubview:)] )
  96         [o_cocoaglview_container removeVoutSubview: p_vout->p_sys->o_glview];
  97
  98     [p_vout->p_sys->o_pool release];
  99
 100 }
 101
 102 /*****************************************************************************
 103  * cocoaglvoutviewManage
 104  *****************************************************************************/
 105 int cocoaglvoutviewManage( vout_thread_t * p_vout )
 106 {
 107     if( p_vout->i_changes & VOUT_ASPECT_CHANGE )
 108     {
 109         [p_vout->p_sys->o_glview reshape];
 110         p_vout->i_changes &= ~VOUT_ASPECT_CHANGE;
 111     }
 112     if( p_vout->i_changes & VOUT_CROP_CHANGE )
 113     {
 114         [p_vout->p_sys->o_glview reshape];
 115         p_vout->i_changes &= ~VOUT_CROP_CHANGE;
 116     }
 117
 118     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 119     {
 120         NSAutoreleasePool *o_pool = [[NSAutoreleasePool alloc] init];
 121
 122         p_vout->b_fullscreen = !p_vout->b_fullscreen;
 123
 124         if( p_vout->b_fullscreen )
 125             [[p_vout->p_sys->o_glview container] enterFullscreen];
 126         else
 127             [[p_vout->p_sys->o_glview container] leaveFullscreen];
 128
 129         [o_pool release];
 130
 131         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 132     }
 133
 134     //[[p_vout->p_sys->o_glview container] manage];
 135     return VLC_SUCCESS;
 136 }
 137
 138 /*****************************************************************************
 139  * cocoaglvoutviewControl: control facility for the vout
 140  *****************************************************************************/
 141 int cocoaglvoutviewControl( vout_thread_t *p_vout, int i_query, va_list args )
 142 {
 143     vlc_bool_t b_arg;
 144
 145     switch( i_query )
 146     {
 147         case VOUT_SET_STAY_ON_TOP:
 148             b_arg = va_arg( args, vlc_bool_t );
 149             [[p_vout->p_sys->o_glview container] setOnTop: b_arg];
 150             return VLC_SUCCESS;
 151
 152         case VOUT_CLOSE:
 153         case VOUT_REPARENT:
 154         default:
 155             return vout_vaControlDefault( p_vout, i_query, args );
 156     }
 157 }
 158
 159 /*****************************************************************************
 160  * cocoaglvoutviewSwap
 161  *****************************************************************************/
 162 void cocoaglvoutviewSwap( vout_thread_t * p_vout )
 163 {
 164     p_vout->p_sys->b_got_frame = VLC_TRUE;
 165     [[p_vout->p_sys->o_glview openGLContext] flushBuffer];
 166 }
 167
 168 /*****************************************************************************
 169  * cocoaglvoutviewLock
 170  *****************************************************************************/
 171 int cocoaglvoutviewLock( vout_thread_t * p_vout )
 172 {
 173     if( kCGLNoError == CGLLockContext([[p_vout->p_sys->o_glview openGLContext] CGLContextObj]) )
 174     {
 175         [[p_vout->p_sys->o_glview openGLContext] makeCurrentContext];
 176         return 0;
 177     }
 178     return 1;
 179 }
 180
 181 /*****************************************************************************
 182  * cocoaglvoutviewUnlock
 183  *****************************************************************************/
 184 void cocoaglvoutviewUnlock( vout_thread_t * p_vout )
 185 {
 186     CGLUnlockContext([[p_vout->p_sys->o_glview openGLContext] CGLContextObj]);
 187 }
 188
 189 /*****************************************************************************
 190  * VLCOpenGLVoutView implementation
 191  *****************************************************************************/
 192 @implementation VLCOpenGLVoutView
 193
 194 /* Init a new gl view and register it to both the framework and the
 195  * vout_thread_t. Must be called from main thread. */
 196 + (void) autoinitOpenGLVoutViewIntVoutWithContainer: (NSData *) argsAsData
 197 {
 198     struct args { vout_thread_t * p_vout; id <VLCOpenGLVoutEmbedding> container; } *
 199         args = (struct args *)[argsAsData bytes];
 200     VLCOpenGLVoutView * oglview;
 201
 202     oglview = [[VLCOpenGLVoutView alloc] initWithVout: args->p_vout container: args->container];
 203
 204     args->p_vout->p_sys->o_glview = [oglview autorelease];
 205
 206     [args->container addVoutSubview: oglview];
 207 }
 208
 209 - (void)dealloc
 210 {
 211     [objectLock dealloc];
 212     [super dealloc];
 213 }
 214
 215 - (void)removeFromSuperview
 216 {
 217     [super removeFromSuperview];
 218 }
 219
 220
 221 - (id) initWithVout: (vout_thread_t *) vout container: (id <VLCOpenGLVoutEmbedding>) aContainer
 222 {
 223     NSOpenGLPixelFormatAttribute attribs[] =
 224     {
 225         NSOpenGLPFADoubleBuffer,
 226         NSOpenGLPFAAccelerated,
 227         NSOpenGLPFANoRecovery,
 228         NSOpenGLPFAColorSize, 24,
 229         NSOpenGLPFAAlphaSize, 8,
 230         NSOpenGLPFADepthSize, 24,
 231         NSOpenGLPFAWindow,
 232         0
 233     };
 234
 235     NSOpenGLPixelFormat * fmt = [[NSOpenGLPixelFormat alloc]
 236         initWithAttributes: attribs];
 237
 238     if( !fmt )
 239     {
 240         msg_Warn( p_vout, "could not create OpenGL video output" );
 241         return nil;
 242     }
 243
 244     if( self = [super initWithFrame: NSMakeRect(0,0,10,10) pixelFormat: fmt] )
 245     {
 246         p_vout = vout;
 247         container = aContainer;
 248         objectLock = [[NSLock alloc] init];
 249
 250         [fmt release];
 251
 252         [[self openGLContext] makeCurrentContext];
 253         [[self openGLContext] update];
 254
 255         /* Swap buffers only during the vertical retrace of the monitor.
 256         http://developer.apple.com/documentation/GraphicsImaging/
 257         Conceptual/OpenGL/chap5/chapter_5_section_44.html */
 258         long params[] = { 1 };
 259         CGLSetParameter( CGLGetCurrentContext(), kCGLCPSwapInterval,
 260                      params );
 261     }
 262     return self;
 263 }
 264
 265 - (void) detachFromVout
 266 {
 267     [objectLock lock];
 268     p_vout = NULL;
 269     [objectLock unlock];
 270 }
 271
 272 - (id <VLCOpenGLVoutEmbedding>) container
 273 {
 274     return container;
 275 }
 276
 277 - (void) destroyVout
 278 {
 279     [objectLock lock];
 280     if( p_vout )
 281     {
 282         vlc_object_detach( p_vout );
 283         vlc_object_release( p_vout );
 284         vout_Destroy( (vout_thread_t *)p_vout );
 285     }
 286     [objectLock unlock];
 287 }
 288
 289 - (void) reshape
 290 {
 291     int x, y;
 292     vlc_value_t val;
 293
 294     [objectLock lock];
 295     if( !p_vout )
 296     {
 297         [objectLock unlock];
 298         return;
 299     }
 300
 301     cocoaglvoutviewLock( p_vout );
 302     NSRect bounds = [self bounds];
 303
 304     if( [[self container] stretchesVideo] )
 305     {
 306         x = bounds.size.width;
 307         y = bounds.size.height;
 308     }
 309     else if( bounds.size.height * p_vout->fmt_in.i_visible_width *
 310              p_vout->fmt_in.i_sar_num <
 311              bounds.size.width * p_vout->fmt_in.i_visible_height *
 312              p_vout->fmt_in.i_sar_den )
 313     {
 314         x = ( bounds.size.height * p_vout->fmt_in.i_visible_width *
 315               p_vout->fmt_in.i_sar_num ) /
 316             ( p_vout->fmt_in.i_visible_height * p_vout->fmt_in.i_sar_den);
 317
 318         y = bounds.size.height;
 319     }
 320     else
 321     {
 322         x = bounds.size.width;
 323         y = ( bounds.size.width * p_vout->fmt_in.i_visible_height *
 324               p_vout->fmt_in.i_sar_den) /
 325             ( p_vout->fmt_in.i_visible_width * p_vout->fmt_in.i_sar_num  );
 326     }
 327
 328     glViewport( ( bounds.size.width - x ) / 2,
 329                 ( bounds.size.height - y ) / 2, x, y );
 330
 331     if( p_vout->p_sys->b_got_frame )
 332     {
 333         /* Ask the opengl module to redraw */
 334         vout_thread_t * p_parent;
 335         p_parent = (vout_thread_t *) p_vout->p_parent;
 336         cocoaglvoutviewUnlock( p_vout );
 337         if( p_parent && p_parent->pf_display )
 338         {
 339             p_parent->pf_display( p_parent, NULL );
 340         }
 341     }
 342     else
 343     {
 344         glClear( GL_COLOR_BUFFER_BIT );
 345         cocoaglvoutviewUnlock( p_vout );
 346     }
 347     [objectLock unlock];
 348     [super reshape];
 349 }
 350
 351 - (void) update
 352 {
 353     if( kCGLNoError != CGLLockContext([[self openGLContext] CGLContextObj]) )
 354         return;
 355     [super update];
 356     CGLUnlockContext([[p_vout->p_sys->o_glview openGLContext] CGLContextObj]);
 357 }
 358
 359 - (void) drawRect: (NSRect) rect
 360 {
 361     if( kCGLNoError != CGLLockContext([[self openGLContext] CGLContextObj]) )
 362         return;
 363     [[self openGLContext] flushBuffer];
 364     [super drawRect:rect];
 365     CGLUnlockContext([[p_vout->p_sys->o_glview openGLContext] CGLContextObj]);
 366 }
 367
 368 @end
 369