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

   1 /*****************************************************************************
   2  * macosx.m: MacOS X OpenGL provider
   3  *****************************************************************************
   4  * Copyright (C) 2001-2012 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  *          Pierre d'Herbemont <pdherbemont at videolan dot org>
  15  *          Felix Paul Kühne <fkuehne at videolan dot org>
  16  *
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  30  *****************************************************************************/
  31
  32 /*****************************************************************************
  33  * Preamble
  34  *****************************************************************************/
  35
  36 #import <Cocoa/Cocoa.h>
  37 #import <OpenGL/OpenGL.h>
  38
  39 #ifdef HAVE_CONFIG_H
  40 # include "config.h"
  41 #endif
  42
  43 #include <vlc_common.h>
  44 #include <vlc_plugin.h>
  45 #include <vlc_vout_display.h>
  46 #include <vlc_opengl.h>
  47 #include <vlc_dialog.h>
  48 #include "opengl.h"
  49
  50 @interface NSWindow (VLCCustomCode)
  51 - (BOOL)isFullscreen;
  52 @end
  53
  54 /**
  55  * Forward declarations
  56  */
  57 static int Open(vlc_object_t *);
  58 static void Close(vlc_object_t *);
  59
  60 static picture_pool_t *Pool(vout_display_t *vd, unsigned requested_count);
  61 static void PictureRender(vout_display_t *vd, picture_t *pic, subpicture_t *subpicture);
  62 static void PictureDisplay(vout_display_t *vd, picture_t *pic, subpicture_t *subpicture);
  63 static int Control (vout_display_t *vd, int query, va_list ap);
  64
  65 static int OpenglLock(vlc_gl_t *gl);
  66 static void OpenglUnlock(vlc_gl_t *gl);
  67 static void OpenglSwap(vlc_gl_t *gl);
  68
  69 /**
  70  * Module declaration
  71  */
  72 vlc_module_begin ()
  73     /* Will be loaded even without interface module. see voutgl.m */
  74     set_shortname("Mac OS X")
  75     set_description( N_("Mac OS X OpenGL video output (requires drawable-nsobject)"))
  76     set_category(CAT_VIDEO)
  77     set_subcategory(SUBCAT_VIDEO_VOUT )
  78     set_capability("vout display", 300)
  79     set_callbacks(Open, Close)
  80
  81     add_shortcut("macosx", "vout_macosx")
  82 vlc_module_end ()
  83
  84 /**
  85  * Obj-C protocol declaration that drawable-nsobject should follow
  86  */
  87 @protocol VLCOpenGLVideoViewEmbedding <NSObject>
  88 - (void)addVoutSubview:(NSView *)view;
  89 - (void)removeVoutSubview:(NSView *)view;
  90 @end
  91
  92 @interface VLCOpenGLVideoView : NSOpenGLView
  93 {
  94     vout_display_t *vd;
  95     BOOL _hasPendingReshape;
  96 }
  97 - (void)setVoutDisplay:(vout_display_t *)vd;
  98 - (vout_display_t *)voutDisplay;
  99 - (void)setVoutFlushing:(BOOL)flushing;
 100 @end
 101
 102
 103 struct vout_display_sys_t
 104 {
 105     VLCOpenGLVideoView *glView;
 106     id<VLCOpenGLVideoViewEmbedding> container;
 107
 108     vout_window_t *embed;
 109     vlc_gl_t gl;
 110     vout_display_opengl_t *vgl;
 111
 112     picture_pool_t *pool;
 113     picture_t *current;
 114     bool has_first_frame;
 115 };
 116
 117 static int Open(vlc_object_t *this)
 118 {
 119     vout_display_t *vd = (vout_display_t *)this;
 120     vout_display_sys_t *sys = calloc(1, sizeof(*sys));
 121     NSAutoreleasePool *nsPool = nil;
 122
 123     if (!sys)
 124         return VLC_ENOMEM;
 125
 126     if( !CGDisplayUsesOpenGLAcceleration( kCGDirectMainDisplay ) )
 127     {
 128         msg_Err( this, "no OpenGL hardware acceleration found, video output will fail" );
 129         dialog_Fatal( this, _("Video output is not supported"), _("Your Mac lacks Quartz Extreme acceleration, which is required for video output.") );
 130         return VLC_EGENERIC;
 131     }
 132     else
 133         msg_Dbg( this, "Quartz Extreme acceleration is active" );
 134
 135     vd->sys = sys;
 136     sys->pool = NULL;
 137     sys->gl.sys = NULL;
 138     sys->embed = NULL;
 139
 140     /* Get the drawable object */
 141     id container = var_CreateGetAddress(vd, "drawable-nsobject");
 142     if (container)
 143     {
 144         vout_display_DeleteWindow(vd, NULL);
 145     }
 146     else
 147     {
 148         vout_window_cfg_t wnd_cfg;
 149
 150         memset (&wnd_cfg, 0, sizeof (wnd_cfg));
 151         wnd_cfg.type = VOUT_WINDOW_TYPE_NSOBJECT;
 152         wnd_cfg.x = var_InheritInteger (vd, "video-x");
 153         wnd_cfg.y = var_InheritInteger (vd, "video-y");
 154         wnd_cfg.width  = vd->cfg->display.width;
 155         wnd_cfg.height = vd->cfg->display.height;
 156
 157         sys->embed = vout_display_NewWindow (vd, &wnd_cfg);
 158         if (sys->embed)
 159             container = sys->embed->handle.nsobject;
 160
 161         if (!container)
 162         {
 163             msg_Dbg(vd, "No drawable-nsobject nor vout_window_t found, passing over.");
 164             goto error;
 165         }
 166     }
 167
 168     /* This will be released in Close(), on
 169      * main thread, after we are done using it. */
 170     sys->container = [container retain];
 171
 172     /* Get our main view*/
 173     nsPool = [[NSAutoreleasePool alloc] init];
 174
 175     [VLCOpenGLVideoView performSelectorOnMainThread:@selector(getNewView:) withObject:[NSValue valueWithPointer:&sys->glView] waitUntilDone:YES];
 176     if (!sys->glView)
 177         goto error;
 178
 179     [sys->glView setVoutDisplay:vd];
 180
 181     /* We don't wait, that means that we'll have to be careful about releasing
 182      * container.
 183      * That's why we'll release on main thread in Close(). */
 184     if ([(id)container respondsToSelector:@selector(addVoutSubview:)])
 185         [(id)container performSelectorOnMainThread:@selector(addVoutSubview:) withObject:sys->glView waitUntilDone:NO];
 186     else if ([container isKindOfClass:[NSView class]])
 187     {
 188         NSView *parentView = container;
 189         [parentView performSelectorOnMainThread:@selector(addSubview:) withObject:sys->glView waitUntilDone:NO];
 190         [sys->glView performSelectorOnMainThread:@selector(setFrameWithValue:) withObject:[NSValue valueWithRect:[parentView bounds]] waitUntilDone:NO];
 191     }
 192     else
 193     {
 194         msg_Err(vd, "Invalid drawable-nsobject object. drawable-nsobject must either be an NSView or comply to the @protocol VLCOpenGLVideoViewEmbedding.");
 195         goto error;
 196     }
 197
 198
 199     [nsPool release];
 200     nsPool = nil;
 201
 202     /* Initialize common OpenGL video display */
 203     sys->gl.lock = OpenglLock;
 204     sys->gl.unlock = OpenglUnlock;
 205     sys->gl.swap = OpenglSwap;
 206     sys->gl.getProcAddress = NULL;
 207     sys->gl.sys = sys;
 208     const vlc_fourcc_t *subpicture_chromas;
 209     video_format_t fmt = vd->fmt;
 210
 211     sys->vgl = vout_display_opengl_New(&vd->fmt, &subpicture_chromas, &sys->gl);
 212     if (!sys->vgl)
 213     {
 214         sys->gl.sys = NULL;
 215         goto error;
 216     }
 217
 218     /* */
 219     vout_display_info_t info = vd->info;
 220     info.has_pictures_invalid = false;
 221     info.has_event_thread = true;
 222     info.subpicture_chromas = subpicture_chromas;
 223
 224     /* Setup vout_display_t once everything is fine */
 225     vd->info = info;
 226
 227     vd->pool = Pool;
 228     vd->prepare = PictureRender;
 229     vd->display = PictureDisplay;
 230     vd->control = Control;
 231
 232     /* */
 233     vout_display_SendEventFullscreen (vd, false);
 234     vout_display_SendEventDisplaySize (vd, vd->source.i_visible_width, vd->source.i_visible_height, false);
 235
 236     return VLC_SUCCESS;
 237
 238 error:
 239     [nsPool release];
 240     Close(this);
 241     return VLC_EGENERIC;
 242 }
 243
 244 void Close(vlc_object_t *this)
 245 {
 246     vout_display_t *vd = (vout_display_t *)this;
 247     vout_display_sys_t *sys = vd->sys;
 248
 249     if ([[sys->glView window] level] != NSNormalWindowLevel)
 250         [[sys->glView window] setLevel: NSNormalWindowLevel];
 251
 252     [sys->glView setVoutDisplay:nil];
 253
 254     var_Destroy(vd, "drawable-nsobject");
 255     if ([(id)sys->container respondsToSelector:@selector(removeVoutSubview:)])
 256     {
 257         /* This will retain sys->glView */
 258         [(id)sys->container performSelectorOnMainThread:@selector(removeVoutSubview:) withObject:sys->glView waitUntilDone:NO];
 259     }
 260     /* release on main thread as explained in Open() */
 261     [(id)sys->container performSelectorOnMainThread:@selector(release) withObject:nil waitUntilDone:NO];
 262     [sys->glView performSelectorOnMainThread:@selector(removeFromSuperview) withObject:nil waitUntilDone:NO];
 263
 264     [sys->glView release];
 265
 266     if (sys->gl.sys != NULL)
 267         vout_display_opengl_Delete(sys->vgl);
 268
 269     if (sys->embed)
 270         vout_display_DeleteWindow(vd, sys->embed);
 271     free (sys);
 272 }
 273
 274 /*****************************************************************************
 275  * vout display callbacks
 276  *****************************************************************************/
 277
 278 static picture_pool_t *Pool(vout_display_t *vd, unsigned requested_count)
 279 {
 280     vout_display_sys_t *sys = vd->sys;
 281
 282     if (!sys->pool)
 283         sys->pool = vout_display_opengl_GetPool (sys->vgl, requested_count);
 284     assert(sys->pool);
 285     return sys->pool;
 286 }
 287
 288 static void PictureRender(vout_display_t *vd, picture_t *pic, subpicture_t *subpicture)
 289 {
 290
 291     vout_display_sys_t *sys = vd->sys;
 292
 293     vout_display_opengl_Prepare( sys->vgl, pic, subpicture );
 294 }
 295
 296 static void PictureDisplay(vout_display_t *vd, picture_t *pic, subpicture_t *subpicture)
 297 {
 298     vout_display_sys_t *sys = vd->sys;
 299     [sys->glView setVoutFlushing:YES];
 300     vout_display_opengl_Display(sys->vgl, &vd->fmt );
 301     [sys->glView setVoutFlushing:NO];
 302     picture_Release (pic);
 303     sys->has_first_frame = true;
 304
 305     if (subpicture)
 306         subpicture_Delete(subpicture);
 307 }
 308
 309 static int Control (vout_display_t *vd, int query, va_list ap)
 310 {
 311     vout_display_sys_t *sys = vd->sys;
 312
 313     switch (query)
 314     {
 315         case VOUT_DISPLAY_CHANGE_FULLSCREEN:
 316         {
 317             NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
 318             [[sys->glView window] performSelectorOnMainThread:@selector(fullscreen:) withObject: nil waitUntilDone:NO];
 319             [o_pool release];
 320             return VLC_SUCCESS;
 321         }
 322         case VOUT_DISPLAY_CHANGE_WINDOW_STATE:
 323         {
 324             NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
 325             unsigned state = va_arg (ap, unsigned);
 326             [sys->glView performSelectorOnMainThread:@selector(setWindowLevel:) withObject:[NSNumber numberWithUnsignedInt:state] waitUntilDone:NO];
 327             [o_pool release];
 328             return VLC_SUCCESS;
 329         }
 330         case VOUT_DISPLAY_CHANGE_DISPLAY_FILLED:
 331         {
 332             [[sys->glView window] performSelectorOnMainThread:@selector(performZoom:) withObject: nil waitUntilDone:NO];
 333             return VLC_SUCCESS;
 334         }
 335         case VOUT_DISPLAY_CHANGE_ZOOM:
 336         case VOUT_DISPLAY_CHANGE_SOURCE_ASPECT:
 337         case VOUT_DISPLAY_CHANGE_SOURCE_CROP:
 338             return VLC_SUCCESS;
 339         case VOUT_DISPLAY_CHANGE_DISPLAY_SIZE:
 340         {
 341             // is needed in the case we do not an actual resize
 342             [sys->glView performSelectorOnMainThread:@selector(reshapeView:) withObject:nil waitUntilDone:NO];
 343
 344             if (!config_GetInt( vd, "macosx-video-autoresize" ))
 345                 return VLC_SUCCESS;
 346
 347             NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
 348             NSPoint topleftbase;
 349             NSPoint topleftscreen;
 350             NSRect new_frame;
 351             const vout_display_cfg_t *cfg;
 352
 353             id o_window = [sys->glView window];
 354             if (!o_window)
 355                 return VLC_SUCCESS; // this is okay, since the event will occur again when we have a window
 356             NSRect windowFrame = [o_window frame];
 357             NSRect glViewFrame = [sys->glView frame];
 358             NSSize screenSize = [[o_window screen] visibleFrame].size;
 359             NSSize windowMinSize = [o_window minSize];
 360
 361             topleftbase.x = 0;
 362             topleftbase.y = windowFrame.size.height;
 363             topleftscreen = [o_window convertBaseToScreen: topleftbase];
 364             cfg = (const vout_display_cfg_t*)va_arg (ap, const vout_display_cfg_t *);
 365             int i_width = cfg->display.width;
 366             int i_height = cfg->display.height;
 367
 368             /* Calculate the window's new size, if it is larger than our minimal size */
 369             if (i_width < windowMinSize.width)
 370                 i_width = windowMinSize.width;
 371             if (i_height < windowMinSize.height)
 372                 i_height = windowMinSize.height;
 373
 374             /* make sure the window doesn't exceed the screen size the window is on */
 375             if (i_width > screenSize.width)
 376                 i_width = screenSize.width;
 377             if (i_height > screenSize.height)
 378                 i_height = screenSize.height;
 379
 380             if( i_height != glViewFrame.size.height || i_width != glViewFrame.size.width )
 381             {
 382                 new_frame.size.width = windowFrame.size.width - glViewFrame.size.width + i_width;
 383                 new_frame.size.height = windowFrame.size.height - glViewFrame.size.height + i_height;
 384
 385                 new_frame.origin.x = topleftscreen.x;
 386                 new_frame.origin.y = topleftscreen.y - new_frame.size.height;
 387
 388                 [sys->glView performSelectorOnMainThread:@selector(setWindowFrameWithValue:) withObject:[NSValue valueWithRect:new_frame] waitUntilDone:NO];
 389             }
 390             [o_pool release];
 391             return VLC_SUCCESS;
 392         }
 393
 394         case VOUT_DISPLAY_HIDE_MOUSE:
 395         {
 396             [NSCursor setHiddenUntilMouseMoves: YES];
 397             return VLC_SUCCESS;
 398         }
 399
 400         case VOUT_DISPLAY_GET_OPENGL:
 401         {
 402             vlc_gl_t **gl = va_arg (ap, vlc_gl_t **);
 403             *gl = &sys->gl;
 404             return VLC_SUCCESS;
 405         }
 406
 407         case VOUT_DISPLAY_RESET_PICTURES:
 408             assert (0);
 409         default:
 410             msg_Err (vd, "Unknown request in Mac OS X vout display");
 411             return VLC_EGENERIC;
 412     }
 413 }
 414
 415 /*****************************************************************************
 416  * vout opengl callbacks
 417  *****************************************************************************/
 418 static int OpenglLock(vlc_gl_t *gl)
 419 {
 420     vout_display_sys_t *sys = (vout_display_sys_t *)gl->sys;
 421     NSOpenGLContext *context = [sys->glView openGLContext];
 422     CGLError err = CGLLockContext([context CGLContextObj]);
 423     if (kCGLNoError == err)
 424     {
 425         [context makeCurrentContext];
 426         return 0;
 427     }
 428     return 1;
 429 }
 430
 431 static void OpenglUnlock(vlc_gl_t *gl)
 432 {
 433     vout_display_sys_t *sys = (vout_display_sys_t *)gl->sys;
 434     CGLUnlockContext([[sys->glView openGLContext] CGLContextObj]);
 435 }
 436
 437 static void OpenglSwap(vlc_gl_t *gl)
 438 {
 439     vout_display_sys_t *sys = (vout_display_sys_t *)gl->sys;
 440     [[sys->glView openGLContext] flushBuffer];
 441 }
 442
 443 /*****************************************************************************
 444  * Our NSView object
 445  *****************************************************************************/
 446 @implementation VLCOpenGLVideoView
 447
 448 #define VLCAssertMainThread() assert([[NSThread currentThread] isMainThread])
 449
 450 + (void)getNewView:(NSValue *)value
 451 {
 452     id *ret = [value pointerValue];
 453     *ret = [[self alloc] init];
 454 }
 455
 456 /**
 457  * Gets called by the Open() method.
 458  */
 459 - (id)init
 460 {
 461     VLCAssertMainThread();
 462
 463     /* Warning - this may be called on non main thread */
 464
 465     NSOpenGLPixelFormatAttribute attribs[] =
 466     {
 467         NSOpenGLPFADoubleBuffer,
 468         NSOpenGLPFAAccelerated,
 469         NSOpenGLPFANoRecovery,
 470         NSOpenGLPFAColorSize, 24,
 471         NSOpenGLPFAAlphaSize, 8,
 472         NSOpenGLPFADepthSize, 24,
 473         NSOpenGLPFAWindow,
 474         0
 475     };
 476
 477     NSOpenGLPixelFormat *fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs];
 478
 479     if (!fmt)
 480         return nil;
 481
 482     self = [super initWithFrame:NSMakeRect(0,0,10,10) pixelFormat:fmt];
 483     [fmt release];
 484
 485     if (!self)
 486         return nil;
 487
 488     /* Swap buffers only during the vertical retrace of the monitor.
 489      http://developer.apple.com/documentation/GraphicsImaging/
 490      Conceptual/OpenGL/chap5/chapter_5_section_44.html */
 491     GLint params[] = { 1 };
 492     CGLSetParameter([[self openGLContext] CGLContextObj], kCGLCPSwapInterval, params);
 493
 494     [self setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
 495     return self;
 496 }
 497
 498 /**
 499  * Gets called by the Open() method.
 500  */
 501 - (void)setFrameWithValue:(NSValue *)value
 502 {
 503     [self setFrame:[value rectValue]];
 504 }
 505
 506 /**
 507  * Gets called by Control() to make sure that we're performing on the main thread
 508  */
 509 - (void)setWindowFrameWithValue:(NSValue *)value
 510 {
 511     if (![[self window] isFullscreen])
 512     {
 513         NSRect frame = [value rectValue];
 514         if (frame.origin.x <= 0.0 && frame.origin.y <= 0.0)
 515             [[self window] center];
 516         [[self window] setFrame:frame display:YES animate: YES];
 517     }
 518 }
 519
 520 /**
 521  * Gets called by the Close and Open methods.
 522  * (Non main thread).
 523  */
 524 - (void)setVoutDisplay:(vout_display_t *)aVd
 525 {
 526     @synchronized(self) {
 527         vd = aVd;
 528     }
 529 }
 530
 531 - (vout_display_t *)voutDisplay
 532 {
 533     return vd;
 534 }
 535
 536 /**
 537  * Gets called when the vout will aquire the lock and flush.
 538  * (Non main thread).
 539  */
 540 - (void)setVoutFlushing:(BOOL)flushing
 541 {
 542     if (!flushing)
 543         return;
 544     @synchronized(self) {
 545         _hasPendingReshape = NO;
 546     }
 547 }
 548
 549 /**
 550  * Can -drawRect skip rendering?.
 551  */
 552 - (BOOL)canSkipRendering
 553 {
 554     VLCAssertMainThread();
 555
 556     @synchronized(self) {
 557         BOOL hasFirstFrame = vd && vd->sys->has_first_frame;
 558         return !_hasPendingReshape && hasFirstFrame;
 559     }
 560 }
 561
 562
 563 /**
 564  * Local method that locks the gl context.
 565  */
 566 - (BOOL)lockgl
 567 {
 568     VLCAssertMainThread();
 569     NSOpenGLContext *context = [self openGLContext];
 570     CGLError err = CGLLockContext([context CGLContextObj]);
 571     if (err == kCGLNoError)
 572         [context makeCurrentContext];
 573     return err == kCGLNoError;
 574 }
 575
 576 /**
 577  * Local method that unlocks the gl context.
 578  */
 579 - (void)unlockgl
 580 {
 581     VLCAssertMainThread();
 582     CGLUnlockContext([[self openGLContext] CGLContextObj]);
 583 }
 584
 585 /**
 586  * Local method that force a rendering of a frame.
 587  * This will get called if Cocoa forces us to redraw (via -drawRect).
 588  */
 589 - (void)render
 590 {
 591     VLCAssertMainThread();
 592
 593     // We may have taken some times to take the opengl Lock.
 594     // Check here to see if we can just skip the frame as well.
 595     if ([self canSkipRendering])
 596         return;
 597
 598     BOOL hasFirstFrame;
 599     @synchronized(self) { // vd can be accessed from multiple threads
 600         hasFirstFrame = vd && vd->sys->has_first_frame;
 601     }
 602
 603     if (hasFirstFrame) {
 604         // This will lock gl.
 605         vout_display_opengl_Display( vd->sys->vgl, &vd->source );
 606     }
 607     else
 608         glClear(GL_COLOR_BUFFER_BIT);
 609 }
 610
 611 - (void)reshapeView:(id)sender
 612 {
 613     [self reshape];
 614 }
 615
 616 /**
 617  * Method called by Cocoa when the view is resized.
 618  */
 619 - (void)reshape
 620 {
 621     VLCAssertMainThread();
 622
 623     NSRect bounds = [self bounds];
 624
 625     CGFloat height = bounds.size.height;
 626     CGFloat width = bounds.size.width;
 627
 628     GLint x = width, y = height;
 629
 630     @synchronized(self) {
 631         if (vd) {
 632             CGFloat videoHeight = vd->source.i_visible_height;
 633             CGFloat videoWidth = vd->source.i_visible_width;
 634
 635             GLint sarNum = vd->source.i_sar_num;
 636             GLint sarDen = vd->source.i_sar_den;
 637
 638             if (height * videoWidth * sarNum < width * videoHeight * sarDen)
 639             {
 640                 x = (height * videoWidth * sarNum) / (videoHeight * sarDen);
 641                 y = height;
 642             }
 643             else
 644             {
 645                 x = width;
 646                 y = (width * videoHeight * sarDen) / (videoWidth * sarNum);
 647             }
 648         }
 649     }
 650
 651     if ([self lockgl]) {
 652         glViewport((width - x) / 2, (height - y) / 2, x, y);
 653
 654         @synchronized(self) {
 655             // This may be cleared before -drawRect is being called,
 656             // in this case we'll skip the rendering.
 657             // This will save us for rendering two frames (or more) for nothing
 658             // (one by the vout, one (or more) by drawRect)
 659             _hasPendingReshape = YES;
 660         }
 661
 662         [self unlockgl];
 663
 664         [super reshape];
 665     }
 666 }
 667
 668 /**
 669  * Method called by Cocoa when the view is resized or the location has changed.
 670  * We just need to make sure we are locking here.
 671  */
 672 - (void)update
 673 {
 674     VLCAssertMainThread();
 675     BOOL success = [self lockgl];
 676     if (!success)
 677         return;
 678
 679     [super update];
 680
 681     [self unlockgl];
 682 }
 683
 684 /**
 685  * Method called by Cocoa to force redraw.
 686  */
 687 - (void)drawRect:(NSRect) rect
 688 {
 689     VLCAssertMainThread();
 690
 691     if ([self canSkipRendering])
 692         return;
 693
 694     BOOL success = [self lockgl];
 695     if (!success)
 696         return;
 697
 698     [self render];
 699
 700     [self unlockgl];
 701 }
 702
 703 - (void)renewGState
 704 {
 705     NSWindow *window = [self window];
 706
 707     // Remove flashes with splitter view.
 708     if ([window respondsToSelector:@selector(disableScreenUpdatesUntilFlush)])
 709         [window disableScreenUpdatesUntilFlush];
 710
 711     [super renewGState];
 712 }
 713
 714 - (BOOL)mouseDownCanMoveWindow
 715 {
 716     return YES;
 717 }
 718
 719 - (BOOL)isOpaque
 720 {
 721     return YES;
 722 }
 723
 724 - (void)setWindowLevel:(NSNumber*)state
 725 {
 726     if( [state unsignedIntValue] & VOUT_WINDOW_STATE_ABOVE )
 727         [[self window] setLevel: NSStatusWindowLevel];
 728     else
 729         [[self window] setLevel: NSNormalWindowLevel];
 730 }
 731 @end