Shamusworld >> Repos - virtualjaguar/blob - src/gui/mainwin.cpp

   1 //
   2 // mainwin.cpp - Qt-based GUI for Virtual Jaguar: Main Application Window
   3 // by James L. Hammons
   4 // (C) 2009 Underground Software
   5 //
   6 // JLH = James L. Hammons <jlhamm@acm.org>
   7 //
   8 // Who  When        What
   9 // ---  ----------  -------------------------------------------------------------
  10 // JLH  12/23/2009  Created this file
  11 // JLH  12/20/2010  Added settings, menus & toolbars
  12 //
  13
  14 // FIXED:
  15 //
  16 //
  17 // STILL TO BE DONE:
  18 //
  19 //
  20
  21 // Uncomment this for debugging...
  22 //#define DEBUG
  23 //#define DEBUGFOO                      // Various tool debugging...
  24 //#define DEBUGTP                               // Toolpalette debugging...
  25
  26 #include "mainwin.h"
  27
  28 //#include <QtGui>
  29 //#include <QtOpenGL>
  30 #include "glwidget.h"
  31 #include "about.h"
  32 #include "settings.h"
  33 #include "filepicker.h"
  34
  35 #include "jaguar.h"
  36 #include "video.h"
  37 #include "tom.h"
  38 #include "log.h"
  39 #include "file.h"
  40
  41 // Uncomment this to use built-in BIOS/CD-ROM BIOS
  42 // You'll need a copy of jagboot.h & jagcd.h for this to work...!
  43 //#define USE_BUILT_IN_BIOS
  44
  45 // Uncomment this for an official Virtual Jaguar release
  46 //#define VJ_RELEASE_VERSION "2.0.0"
  47 #warning !!! FIX !!! Figure out how to use this in GUI.CPP as well!
  48
  49 #ifdef USE_BUILT_IN_BIOS
  50 #include "jagboot.h"
  51 #include "jagcd.h"
  52 #endif
  53
  54 // The way BSNES controls things is by setting a timer with a zero
  55 // timeout, sleeping if not emulating anything. Seems there has to be a
  56 // better way.
  57
  58 // It has a novel approach to plugging-in/using different video/audio/input
  59 // methods, can we do something similar or should we just use the built-in
  60 // QOpenGL?
  61
  62 // We're going to try to use the built-in OpenGL support and see how it goes.
  63 // We'll make the VJ core modular so that it doesn't matter what GUI is in
  64 // use, we can drop it in anywhere and use it as-is.
  65
  66 MainWin::MainWin()
  67 {
  68         videoWidget = new GLWidget(this);
  69         setCentralWidget(videoWidget);
  70         setWindowIcon(QIcon(":/res/vj.xpm"));
  71         setWindowTitle("Virtual Jaguar v2.0.0");
  72
  73         ReadSettings();
  74         setUnifiedTitleAndToolBarOnMac(true);
  75
  76         aboutWin = new AboutWindow(this);
  77         filePickWin = new FilePickerWindow(this);
  78
  79     videoWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
  80     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
  81
  82         // Create actions
  83
  84         quitAppAct = new QAction(tr("E&xit"), this);
  85         quitAppAct->setShortcuts(QKeySequence::Quit);
  86         quitAppAct->setStatusTip(tr("Quit Virtual Jaguar"));
  87         connect(quitAppAct, SIGNAL(triggered()), this, SLOT(close()));
  88
  89         powerAct = new QAction(QIcon(":/res/power.png"), tr("&Power"), this);
  90         powerAct->setStatusTip(tr("Toggle running state"));
  91         powerAct->setCheckable(true);
  92         connect(powerAct, SIGNAL(triggered()), this, SLOT(ToggleRunState()));
  93
  94         zoomActs = new QActionGroup(this);
  95
  96         x1Act = new QAction(QIcon(":/res/zoom100.png"), tr("Zoom 100%"), zoomActs);
  97         x1Act->setStatusTip(tr("Set window zoom to 100%"));
  98         x1Act->setCheckable(true);
  99         connect(x1Act, SIGNAL(triggered()), this, SLOT(SetZoom100()));
 100
 101         x2Act = new QAction(QIcon(":/res/zoom200.png"), tr("Zoom 200%"), zoomActs);
 102         x2Act->setStatusTip(tr("Set window zoom to 200%"));
 103         x2Act->setCheckable(true);
 104         connect(x2Act, SIGNAL(triggered()), this, SLOT(SetZoom200()));
 105
 106         x3Act = new QAction(QIcon(":/res/zoom300.png"), tr("Zoom 300%"), zoomActs);
 107         x3Act->setStatusTip(tr("Set window zoom to 300%"));
 108         x3Act->setCheckable(true);
 109         connect(x3Act, SIGNAL(triggered()), this, SLOT(SetZoom300()));
 110
 111         tvTypeActs = new QActionGroup(this);
 112
 113         ntscAct = new QAction(QIcon(":/res/generic.png"), tr("NTSC"), tvTypeActs);
 114         ntscAct->setStatusTip(tr("Sets Jaguar to NTSC mode"));
 115         ntscAct->setCheckable(true);
 116         connect(ntscAct, SIGNAL(triggered()), this, SLOT(SetNTSC()));
 117
 118         palAct = new QAction(QIcon(":/res/generic.png"), tr("PAL"), tvTypeActs);
 119         palAct->setStatusTip(tr("Sets Jaguar to PAL mode"));
 120         palAct->setCheckable(true);
 121         connect(palAct, SIGNAL(triggered()), this, SLOT(SetPAL()));
 122
 123         blurAct = new QAction(QIcon(":/res/generic.png"), tr("Blur"), this);
 124         blurAct->setStatusTip(tr("Sets OpenGL rendering to GL_NEAREST"));
 125         blurAct->setCheckable(true);
 126         connect(blurAct, SIGNAL(triggered()), this, SLOT(ToggleBlur()));
 127
 128         aboutAct = new QAction(QIcon(":/res/generic.png"), tr("&About..."), this);
 129         aboutAct->setStatusTip(tr("Blatant self-promotion"));
 130         connect(aboutAct, SIGNAL(triggered()), this, SLOT(ShowAboutWin()));
 131
 132         filePickAct = new QAction(QIcon(":/res/generic.png"), tr("&Insert Cartridge..."), this);
 133         filePickAct->setStatusTip(tr("Insert a cartridge into Virtual Jaguar"));
 134         connect(filePickAct, SIGNAL(triggered()), this, SLOT(InsertCart()));
 135
 136         // Create menus & toolbars
 137
 138         fileMenu = menuBar()->addMenu(tr("&File"));
 139         fileMenu->addAction(filePickAct);
 140         fileMenu->addAction(powerAct);
 141         fileMenu->addAction(quitAppAct);
 142
 143         helpMenu = menuBar()->addMenu(tr("&Help"));
 144         helpMenu->addAction(aboutAct);
 145
 146         toolbar = addToolBar(tr("Stuff"));
 147         toolbar->addAction(powerAct);
 148         toolbar->addSeparator();
 149         toolbar->addAction(x1Act);
 150         toolbar->addAction(x2Act);
 151         toolbar->addAction(x3Act);
 152         toolbar->addSeparator();
 153         toolbar->addAction(ntscAct);
 154         toolbar->addAction(palAct);
 155         toolbar->addSeparator();
 156         toolbar->addAction(blurAct);
 157
 158         //      Create status bar
 159         statusBar()->showMessage(tr("Ready"));
 160
 161         // Set toolbar buttons/menus based on settings read in (sync the UI)...
 162         blurAct->setChecked(vjs.glFilter);
 163         x1Act->setChecked(zoomLevel == 1);
 164         x2Act->setChecked(zoomLevel == 2);
 165         x3Act->setChecked(zoomLevel == 3);
 166         running = powerAct->isChecked();
 167         ntscAct->setChecked(vjs.hardwareTypeNTSC);
 168         palAct->setChecked(!vjs.hardwareTypeNTSC);
 169
 170         // Do this in case original size isn't correct (mostly for the first-run case)
 171         ResizeMainWindow();
 172
 173         // Set up timer based loop for animation...
 174         timer = new QTimer(this);
 175         connect(timer, SIGNAL(timeout()), this, SLOT(Timer()));
 176         timer->start(20);
 177
 178 #ifdef VJ_RELEASE_VERSION
 179         WriteLog("Virtual Jaguar %s (Last full build was on %s %s)\n", VJ_RELEASE_VERSION, __DATE__, __TIME__);
 180 #else
 181         WriteLog("Virtual Jaguar SVN %s (Last full build was on %s %s)\n", __DATE__, __DATE__, __TIME__);
 182 #endif
 183         WriteLog("Initializing jaguar subsystem...\n");
 184         JaguarInit();
 185
 186         // Get the BIOS ROM
 187 #ifdef USE_BUILT_IN_BIOS
 188         WriteLog("VJ: Using built in BIOS/CD BIOS...\n");
 189         memcpy(jaguarBootROM, jagBootROM, 0x20000);
 190         memcpy(jaguarCDBootROM, jagCDROM, 0x40000);
 191         BIOSLoaded = CDBIOSLoaded = true;
 192 #else
 193 // What would be nice here would be a way to check if the BIOS was loaded so that we
 194 // could disable the pushbutton on the Misc Options menu... !!! FIX !!! [DONE here, but needs to be fixed in GUI as well!]
 195 WriteLog("About to attempt to load BIOSes...\n");
 196 #if 1
 197 //This is short-circuiting the file finding thread... ??? WHY ???
 198         BIOSLoaded = (JaguarLoadROM(jaguarBootROM, vjs.jagBootPath) == 0x20000 ? true : false);
 199 #else
 200         BIOSLoaded = false;
 201 #endif
 202         WriteLog("VJ: BIOS is %savailable...\n", (BIOSLoaded ? "" : "not "));
 203         CDBIOSLoaded = (JaguarLoadROM(jaguarCDBootROM, vjs.CDBootPath) == 0x40000 ? true : false);
 204         WriteLog("VJ: CD BIOS is %savailable...\n", (CDBIOSLoaded ? "" : "not "));
 205 #endif
 206
 207         SET32(jaguarMainRAM, 0, 0x00200000);                    // Set top of stack...
 208
 209 //This is crappy!!! !!! FIX !!!
 210 //Is this even needed any more? Hmm. Maybe. Dunno.
 211 //Seems like it is... But then again, maybe not. Have to test it to see.
 212 WriteLog("GUI: Resetting Jaguar...\n");
 213         JaguarReset();
 214
 215 }
 216
 217 void MainWin::closeEvent(QCloseEvent * event)
 218 {
 219         WriteSettings();
 220         event->accept(); // ignore() if can't close for some reason
 221 }
 222
 223 void MainWin::Open(void)
 224 {
 225 }
 226
 227 //
 228 // Here's the main emulator loop
 229 //
 230 void MainWin::Timer(void)
 231 {
 232         if (!running)
 233                 return;
 234
 235 #if 0
 236         // Random hash & trash
 237         // We try to simulate an untuned tank circuit here... :-)
 238         for(uint32_t x=0; x<videoWidget->rasterWidth; x++)
 239         {
 240                 for(uint32_t y=0; y<videoWidget->rasterHeight; y++)
 241                 {
 242                         videoWidget->buffer[(y * videoWidget->textureWidth) + x] = (rand() & 0xFF) << 8 | (rand() & 0xFF) << 16 | (rand() & 0xFF) << 24;// | (rand() & 0xFF);//0x000000FF;
 243 //                      buffer[(y * textureWidth) + x] = x*y;
 244                 }
 245         }
 246 #else
 247         JaguarExecuteNew();
 248 //      memcpy(videoWidget->buffer, backbuffer, videoWidget->rasterHeight * videoWidget->rasterWidth);
 249         memcpy(videoWidget->buffer, backbuffer, videoWidget->rasterHeight * videoWidget->textureWidth);
 250 //      memcpy(surface->pixels, backbuffer, TOMGetVideoModeWidth() * TOMGetVideoModeHeight() * 4);
 251 #endif
 252
 253         videoWidget->updateGL();
 254 }
 255
 256 #if 0
 257 Window * RunEmu(void)
 258 {
 259 //      extern uint32 * backbuffer;
 260         uint32 * overlayPixels = (uint32 *)sdlemuGetOverlayPixels();
 261         memset(overlayPixels, 0x00, 640 * 480 * 4);                     // Clear out overlay...
 262
 263 //This is crappy... !!! FIX !!!
 264 //      extern bool finished, showGUI;
 265
 266         sdlemuDisableOverlay();
 267
 268 //      uint32 nFrame = 0, nFrameskip = 0;
 269         uint32 totalFrames = 0;
 270         finished = false;
 271         bool showMessage = true;
 272         uint32 showMsgFrames = 120;
 273         uint8 transparency = 0xFF;
 274         // Pass a message to the "joystick" code to debounce the ESC key...
 275         debounceRunKey = true;
 276
 277         uint32 cartType = 4;
 278         if (jaguarRomSize == 0x200000)
 279                 cartType = 0;
 280         else if (jaguarRomSize == 0x400000)
 281                 cartType = 1;
 282         else if (jaguarMainRomCRC32 == 0x687068D5)
 283                 cartType = 2;
 284         else if (jaguarMainRomCRC32 == 0x55A0669C)
 285                 cartType = 3;
 286
 287         const char * cartTypeName[5] = { "2M Cartridge", "4M Cartridge", "CD BIOS", "CD Dev BIOS", "Homebrew" };
 288         uint32 elapsedTicks = SDL_GetTicks(), frameCount = 0, framesPerSecond = 0;
 289
 290         while (!finished)
 291         {
 292                 // Set up new backbuffer with new pixels and data
 293                 JaguarExecuteNew();
 294                 totalFrames++;
 295 //WriteLog("Frame #%u...\n", totalFrames);
 296 //extern bool doDSPDis;
 297 //if (totalFrames == 373)
 298 //      doDSPDis = true;
 299
 300 //Problem: Need to do this *only* when the state changes from visible to not...
 301 //Also, need to clear out the GUI when not on (when showMessage is active...)
 302 if (showGUI || showMessage)
 303         sdlemuEnableOverlay();
 304 else
 305         sdlemuDisableOverlay();
 306
 307 //Add in a new function for clearing patches of screen (ClearOverlayRect)
 308
 309 // Also: Take frame rate into account when calculating fade time...
 310
 311                 // Some QnD GUI stuff here...
 312                 if (showGUI)
 313                 {
 314                         FillScreenRectangle(overlayPixels, 8, 1*FONT_HEIGHT, 128, 4*FONT_HEIGHT, 0x00000000);
 315                         extern uint32 gpu_pc, dsp_pc;
 316                         DrawString(overlayPixels, 8, 1*FONT_HEIGHT, false, "GPU PC: %08X", gpu_pc);
 317                         DrawString(overlayPixels, 8, 2*FONT_HEIGHT, false, "DSP PC: %08X", dsp_pc);
 318                         DrawString(overlayPixels, 8, 4*FONT_HEIGHT, false, "%u FPS", framesPerSecond);
 319                 }
 320
 321                 if (showMessage)
 322                 {
 323                         DrawString2(overlayPixels, 8, 24*FONT_HEIGHT, 0x007F63FF, transparency, "Running...");
 324                         DrawString2(overlayPixels, 8, 26*FONT_HEIGHT, 0x001FFF3F, transparency, "%s, run address: %06X", cartTypeName[cartType], jaguarRunAddress);
 325                         DrawString2(overlayPixels, 8, 27*FONT_HEIGHT, 0x001FFF3F, transparency, "CRC: %08X", jaguarMainRomCRC32);
 326
 327                         if (showMsgFrames == 0)
 328                         {
 329                                 transparency--;
 330
 331                                 if (transparency == 0)
 332 {
 333                                         showMessage = false;
 334 /*extern bool doGPUDis;
 335 doGPUDis = true;//*/
 336 }
 337
 338                         }
 339                         else
 340                                 showMsgFrames--;
 341                 }
 342
 343                 frameCount++;
 344
 345                 if (SDL_GetTicks() - elapsedTicks > 250)
 346                         elapsedTicks += 250, framesPerSecond = frameCount * 4, frameCount = 0;
 347         }
 348
 349         // Save the background for the GUI...
 350         // In this case, we squash the color to monochrome, then force it to blue + green...
 351         for(uint32 i=0; i<TOMGetVideoModeWidth() * 256; i++)
 352         {
 353                 uint32 pixel = backbuffer[i];
 354                 uint8 b = (pixel >> 16) & 0xFF, g = (pixel >> 8) & 0xFF, r = pixel & 0xFF;
 355                 pixel = ((r + g + b) / 3) & 0x00FF;
 356                 backbuffer[i] = 0xFF000000 | (pixel << 16) | (pixel << 8);
 357         }
 358
 359         sdlemuEnableOverlay();
 360
 361         return NULL;
 362 }
 363 #endif
 364
 365 void MainWin::ToggleRunState(void)
 366 {
 367         running = !running;
 368
 369         if (!running)
 370         {
 371 #if 0
 372                 for(uint32_t x=0; x<videoWidget->rasterWidth; x++)
 373                         for(uint32_t y=0; y<videoWidget->rasterHeight; y++)
 374                                 videoWidget->buffer[(y * videoWidget->textureWidth) + x] = 0x00000000;
 375 #else
 376 //              for(uint32_t i=0; i<TOMGetVideoModeWidth() * 256; i++)
 377                 for(uint32_t i=0; i<videoWidget->textureWidth * 256; i++)
 378                 {
 379                         uint32_t pixel = backbuffer[i];
 380 //                      uint8_t b = (pixel >> 16) & 0xFF, g = (pixel >> 8) & 0xFF, r = pixel & 0xFF;
 381                         uint8_t r = (pixel >> 24) & 0xFF, g = (pixel >> 16) & 0xFF, b = (pixel >> 8) & 0xFF;
 382                         pixel = ((r + g + b) / 3) & 0x00FF;
 383 //                      backbuffer[i] = 0xFF000000 | (pixel << 16) | (pixel << 8);
 384                         backbuffer[i] = 0x000000FF | (pixel << 16) | (pixel << 8);
 385                 }
 386
 387 //              memcpy(videoWidget->buffer, backbuffer, videoWidget->rasterHeight * videoWidget->rasterWidth);
 388                 memcpy(videoWidget->buffer, backbuffer, videoWidget->rasterHeight * videoWidget->textureWidth);
 389 #endif
 390
 391                 videoWidget->updateGL();
 392         }
 393 }
 394
 395 void MainWin::SetZoom100(void)
 396 {
 397         zoomLevel = 1;
 398         ResizeMainWindow();
 399 }
 400
 401 void MainWin::SetZoom200(void)
 402 {
 403         zoomLevel = 2;
 404         ResizeMainWindow();
 405 }
 406
 407 void MainWin::SetZoom300(void)
 408 {
 409         zoomLevel = 3;
 410         ResizeMainWindow();
 411 }
 412
 413 void MainWin::SetNTSC(void)
 414 {
 415         vjs.hardwareTypeNTSC = true;
 416         ResizeMainWindow();
 417 }
 418
 419 void MainWin::SetPAL(void)
 420 {
 421         vjs.hardwareTypeNTSC = false;
 422         ResizeMainWindow();
 423 }
 424
 425 void MainWin::ToggleBlur(void)
 426 {
 427         vjs.glFilter = !vjs.glFilter;
 428 }
 429
 430 void MainWin::ShowAboutWin(void)
 431 {
 432         aboutWin->show();
 433 }
 434
 435 void MainWin::InsertCart(void)
 436 {
 437         filePickWin->show();
 438 }
 439
 440 void MainWin::ResizeMainWindow(void)
 441 {
 442         videoWidget->setFixedSize(zoomLevel * 320, zoomLevel * (vjs.hardwareTypeNTSC ? 240 : 256));
 443         show();
 444
 445         for(int i=0; i<2; i++)
 446         {
 447                 resize(0, 0);
 448                 usleep(2000);
 449                 QApplication::processEvents();
 450         }
 451 }
 452
 453 void MainWin::ReadSettings(void)
 454 {
 455         QSettings settings("Underground Software", "Virtual Jaguar");
 456         QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
 457         QSize size = settings.value("size", QSize(400, 400)).toSize();
 458         resize(size);
 459         move(pos);
 460
 461         zoomLevel = settings.value("zoom", 1).toInt();
 462
 463         vjs.useJoystick      = settings.value("useJoystick", false).toBool();
 464         vjs.joyport          = settings.value("joyport", 0).toInt();
 465         vjs.hardwareTypeNTSC = settings.value("hardwareTypeNTSC", true).toBool();
 466         vjs.frameSkip        = settings.value("frameSkip", 0).toInt();
 467         vjs.useJaguarBIOS    = settings.value("useJaguarBIOS", false).toBool();
 468         vjs.DSPEnabled       = settings.value("DSPEnabled", false).toBool();
 469         vjs.usePipelinedDSP  = settings.value("usePipelinedDSP", false).toBool();
 470         vjs.fullscreen       = settings.value("fullscreen", false).toBool();
 471         vjs.useOpenGL        = settings.value("useOpenGL", true).toBool();
 472         vjs.glFilter         = settings.value("glFilterType", 0).toInt();
 473         vjs.renderType       = settings.value("renderType", 0).toInt();
 474         strcpy(vjs.jagBootPath, settings.value("JagBootROM", "./bios/jagboot.rom").toString().toAscii().data());
 475         strcpy(vjs.CDBootPath, settings.value("CDBootROM", "./bios/jagcd.rom").toString().toAscii().data());
 476         strcpy(vjs.EEPROMPath, settings.value("EEPROMs", "./eeproms").toString().toAscii().data());
 477         strcpy(vjs.ROMPath, settings.value("ROMs", "./software").toString().toAscii().data());
 478 }
 479
 480 void MainWin::WriteSettings(void)
 481 {
 482         QSettings settings("Underground Software", "Virtual Jaguar");
 483         settings.setValue("pos", pos());
 484         settings.setValue("size", size());
 485
 486         settings.setValue("zoom", zoomLevel);
 487
 488         settings.setValue("useJoystick", vjs.useJoystick);
 489         settings.setValue("joyport", vjs.joyport);
 490         settings.setValue("hardwareTypeNTSC", vjs.hardwareTypeNTSC);
 491         settings.setValue("frameSkip", vjs.frameSkip);
 492         settings.setValue("useJaguarBIOS", vjs.useJaguarBIOS);
 493         settings.setValue("DSPEnabled", vjs.DSPEnabled);
 494         settings.setValue("usePipelinedDSP", vjs.usePipelinedDSP);
 495         settings.setValue("fullscreen", vjs.fullscreen);
 496         settings.setValue("useOpenGL", vjs.useOpenGL);
 497         settings.setValue("glFilterType", vjs.glFilter);
 498         settings.setValue("renderType", vjs.renderType);
 499         settings.setValue("JagBootROM", vjs.jagBootPath);
 500         settings.setValue("CDBootROM", vjs.CDBootPath);
 501         settings.setValue("EEPROMs", vjs.EEPROMPath);
 502         settings.setValue("ROMs", vjs.ROMPath);
 503 }
 504
 505 // Here's how Byuu does it...
 506 // I think I have it working now... :-)
 507 #if 0
 508 void Utility::resizeMainWindow()
 509 {
 510   unsigned region = config().video.context->region;
 511   unsigned multiplier = config().video.context->multiplier;
 512   unsigned width = 256 * multiplier;
 513   unsigned height = (region == 0 ? 224 : 239) * multiplier;
 514
 515   if(config().video.context->correctAspectRatio)
 516   {
 517     if(region == 0)
 518         {
 519       width = (double)width * config().video.ntscAspectRatio + 0.5;  //NTSC adjust
 520     }
 521         else
 522         {
 523       width = (double)width * config().video.palAspectRatio  + 0.5;  //PAL adjust
 524     }
 525   }
 526
 527   if(config().video.isFullscreen == false)
 528   {
 529     //get effective desktop work area region (ignore Windows taskbar, OS X dock, etc.)
 530     QRect deskRect = QApplication::desktop()->availableGeometry(mainWindow);
 531
 532     //ensure window size will not be larger than viewable desktop area
 533     constrainSize(height, width, deskRect.height()); //- frameHeight);
 534     constrainSize(width, height, deskRect.width());  //- frameWidth );
 535
 536     mainWindow->canvas->setFixedSize(width, height);
 537     mainWindow->show();
 538   }
 539   else
 540   {
 541     for(unsigned i = 0; i < 2; i++)
 542         {
 543       unsigned iWidth = width, iHeight = height;
 544
 545       constrainSize(iHeight, iWidth, mainWindow->canvasContainer->size().height());
 546       constrainSize(iWidth, iHeight, mainWindow->canvasContainer->size().width());
 547
 548       //center canvas onscreen; ensure it is not larger than viewable area
 549       mainWindow->canvas->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 550       mainWindow->canvas->setFixedSize(iWidth, iHeight);
 551       mainWindow->canvas->setMinimumSize(0, 0);
 552
 553       usleep(2000);
 554       QApplication::processEvents();
 555     }
 556   }
 557
 558   //workaround for Qt/Xlib bug:
 559   //if window resize occurs with cursor over it, Qt shows Qt::Size*DiagCursor;
 560   //so force it to show Qt::ArrowCursor, as expected
 561   mainWindow->setCursor(Qt::ArrowCursor);
 562   mainWindow->canvasContainer->setCursor(Qt::ArrowCursor);
 563   mainWindow->canvas->setCursor(Qt::ArrowCursor);
 564
 565   //workaround for DirectSound(?) bug:
 566   //window resizing sometimes breaks audio sync, this call re-initializes it
 567   updateAvSync();
 568 }
 569
 570 void Utility::setScale(unsigned scale)
 571 {
 572   config().video.context->multiplier = scale;
 573   resizeMainWindow();
 574   mainWindow->shrink();
 575   mainWindow->syncUi();
 576 }
 577
 578 void QbWindow::shrink()
 579 {
 580   if(config().video.isFullscreen == false)
 581   {
 582     for(unsigned i = 0; i < 2; i++)
 583         {
 584       resize(0, 0);
 585       usleep(2000);
 586       QApplication::processEvents();
 587     }
 588   }
 589 }
 590 #endif