1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtOpenGL module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

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    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include "qgl.h"

    43 #include "qgl_egl_p.h"

    44 #include "qglpixelbuffer.h"

    45 

    46 #include <qglscreen_qws.h>

    47 #include <qscreenproxy_qws.h>

    48 #include <private/qglwindowsurface_qws_p.h>

    49 

    50 #include <private/qbackingstore_p.h>

    51 #include <private/qfont_p.h>

    52 #include <private/qfontengine_p.h>

    53 #include <private/qgl_p.h>

    54 #include <private/qpaintengine_opengl_p.h>

    55 #include <qpixmap.h>

    56 #include <qtimer.h>

    57 #include <qapplication.h>

    58 #include <qstack.h>

    59 #include <qdesktopwidget.h>

    60 #include <qdebug.h>

    61 #include <qvarlengtharray.h>

    62 

    63 QT_BEGIN_NAMESPACE

    64 

    65 static QGLScreen *glScreenForDevice(QPaintDevice *device)

    66 {

    67     QScreen *screen = qt_screen;

    68     if (screen->classId() == QScreen::MultiClass) {

    69         int screenNumber;

    70         if (device && device->devType() == QInternal::Widget)

    71             screenNumber = qApp->desktop()->screenNumber(static_cast<QWidget *>(device));

    72         else

    73             screenNumber = 0;

    74         screen = screen->subScreens()[screenNumber];

    75     }

    76     while (screen->classId() == QScreen::ProxyClass ||

    77            screen->classId() == QScreen::TransformedClass) {

    78         screen = static_cast<QProxyScreen *>(screen)->screen();

    79     }

    80     if (screen->classId() == QScreen::GLClass)

    81         return static_cast<QGLScreen *>(screen);

    82     else

    83         return 0;

    84 }

    85 

    86 /*

    87     QGLTemporaryContext implementation

    88 */

    89 

    90 class QGLTemporaryContextPrivate

    91 {

    92 public:

    93     QGLWidget *widget;

    94 };

    95 

    96 QGLTemporaryContext::QGLTemporaryContext(bool, QWidget *)

    97     : d(new QGLTemporaryContextPrivate)

    98 {

    99     d->widget = new QGLWidget;

   100     d->widget->makeCurrent();

   101 }

   102 

   103 QGLTemporaryContext::~QGLTemporaryContext()

   104 {

   105     delete d->widget;

   106 }

   107 

   108 /*****************************************************************************

   109   QOpenGL debug facilities

   110  *****************************************************************************/

   111 //#define DEBUG_OPENGL_REGION_UPDATE

   112 

   113 bool QGLFormat::hasOpenGLOverlays()

   114 {

   115     QGLScreen *glScreen = glScreenForDevice(0);

   116     if (glScreen)

   117         return (glScreen->options() & QGLScreen::Overlays);

   118     else

   119         return false;

   120 }

   121 

   122 void qt_egl_add_platform_config(QEglProperties& props, QPaintDevice *device)

   123 {

   124     // Find the QGLScreen for this paint device.

   125     QGLScreen *glScreen = glScreenForDevice(device);

   126     if (!glScreen) {

   127         qWarning("QGLContext::chooseContext(): The screen is not a QGLScreen");

   128         return;

   129     }

   130     int devType = device->devType();

   131     if (devType == QInternal::Image)

   132         props.setPixelFormat(static_cast<QImage *>(device)->format());

   133     else

   134         props.setPixelFormat(glScreen->pixelFormat());

   135 }

   136 

   137 static EGLSurface qt_egl_create_surface

   138     (QEglContext *context, QPaintDevice *device,

   139      const QEglProperties *properties = 0)

   140 {

   141     // Get the screen surface functions, which are used to create native ids.

   142     QGLScreen *glScreen = glScreenForDevice(device);

   143     if (!glScreen)

   144         return EGL_NO_SURFACE;

   145     QGLScreenSurfaceFunctions *funcs = glScreen->surfaceFunctions();

   146     if (!funcs)

   147         return EGL_NO_SURFACE;

   148 

   149     // Create the native drawable for the paint device.

   150     int devType = device->devType();

   151     EGLNativePixmapType pixmapDrawable = 0;

   152     EGLNativeWindowType windowDrawable = 0;

   153     bool ok;

   154     if (devType == QInternal::Pixmap) {

   155         ok = funcs->createNativePixmap(static_cast<QPixmap *>(device), &pixmapDrawable);

   156     } else if (devType == QInternal::Image) {

   157         ok = funcs->createNativeImage(static_cast<QImage *>(device), &pixmapDrawable);

   158     } else {

   159         ok = funcs->createNativeWindow(static_cast<QWidget *>(device), &windowDrawable);

   160     }

   161     if (!ok) {

   162         qWarning("QEglContext::createSurface(): Cannot create the native EGL drawable");

   163         return EGL_NO_SURFACE;

   164     }

   165 

   166     // Create the EGL surface to draw into, based on the native drawable.

   167     const int *props;

   168     if (properties)

   169         props = properties->properties();

   170     else

   171         props = 0;

   172     EGLSurface surf;

   173     if (devType == QInternal::Widget) {

   174         surf = eglCreateWindowSurface

   175             (context->display(), context->config(), windowDrawable, props);

   176     } else {

   177         surf = eglCreatePixmapSurface

   178             (context->display(), context->config(), pixmapDrawable, props);

   179     }

   180     if (surf == EGL_NO_SURFACE)

   181         qWarning("QEglContext::createSurface(): Unable to create EGL surface, error = 0x%x", eglGetError());

   182     return surf;

   183 }

   184 

   185 bool QGLContext::chooseContext(const QGLContext* shareContext)

   186 {

   187     Q_D(QGLContext);

   188 

   189     // Validate the device.

   190     if (!device())

   191         return false;

   192     int devType = device()->devType();

   193     if (devType != QInternal::Pixmap && devType != QInternal::Image && devType != QInternal::Widget) {

   194         qWarning("QGLContext::chooseContext(): Cannot create QGLContext's for paint device type %d", devType);

   195         return false;

   196     }

   197 

   198     // Get the display and initialize it.

   199     d->eglContext = new QEglContext();

   200     d->eglContext->setApi(QEgl::OpenGL);

   201 

   202     // Construct the configuration we need for this surface.

   203     QEglProperties configProps;

   204     qt_egl_add_platform_config(configProps, device());

   205     qt_egl_set_format(configProps, devType, d->glFormat);

   206     configProps.setRenderableType(QEgl::OpenGL);

   207 

   208     // Search for a matching configuration, reducing the complexity

   209     // each time until we get something that matches.

   210     if (!d->eglContext->chooseConfig(configProps)) {

   211         delete d->eglContext;

   212         d->eglContext = 0;

   213         return false;

   214     }

   215 

   216     // Inform the higher layers about the actual format properties.

   217     qt_egl_update_format(*(d->eglContext), d->glFormat);

   218 

   219     // Create a new context for the configuration.

   220     if (!d->eglContext->createContext

   221             (shareContext ? shareContext->d_func()->eglContext : 0)) {

   222         delete d->eglContext;

   223         d->eglContext = 0;

   224         return false;

   225     }

   226     d->sharing = d->eglContext->isSharing();

   227     if (d->sharing && shareContext)

   228         const_cast<QGLContext *>(shareContext)->d_func()->sharing = true;

   229 

   230 #if defined(EGL_VERSION_1_1)

   231     if (d->glFormat.swapInterval() != -1 && devType == QInternal::Widget)

   232         eglSwapInterval(d->eglContext->display(), d->glFormat.swapInterval());

   233 #endif

   234 

   235     // Create the EGL surface to draw into.  We cannot use

   236     // QEglContext::createSurface() because it does not have

   237     // access to the QGLScreen.

   238     d->eglSurface = qt_egl_create_surface(d->eglContext, device());

   239     if (d->eglSurface == EGL_NO_SURFACE) {

   240         delete d->eglContext;

   241         d->eglContext = 0;

   242         return false;

   243     }

   244 

   245     return true;

   246 }

   247 

   248 

   249 bool QGLWidget::event(QEvent *e)

   250 {

   251     return QWidget::event(e);

   252 }

   253 

   254 

   255 void QGLWidget::resizeEvent(QResizeEvent *)

   256 {

   257     Q_D(QGLWidget);

   258     if (!isValid())

   259         return;

   260     makeCurrent();

   261     if (!d->glcx->initialized())

   262         glInit();

   263     resizeGL(width(), height());

   264     //handle overlay

   265 }

   266 

   267 const QGLContext* QGLWidget::overlayContext() const

   268 {

   269     return 0;

   270 }

   271 

   272 void QGLWidget::makeOverlayCurrent()

   273 {

   274     //handle overlay

   275 }

   276 

   277 void QGLWidget::updateOverlayGL()

   278 {

   279     //handle overlay

   280 }

   281 

   282 void QGLWidget::setContext(QGLContext *context, const QGLContext* shareContext, bool deleteOldContext)

   283 {

   284     Q_D(QGLWidget);

   285     if(context == 0) {

   286         qWarning("QGLWidget::setContext: Cannot set null context");

   287         return;

   288     }

   289 

   290     if(d->glcx)

   291         d->glcx->doneCurrent();

   292     QGLContext* oldcx = d->glcx;

   293     d->glcx = context;

   294     if(!d->glcx->isValid())

   295         d->glcx->create(shareContext ? shareContext : oldcx);

   296     if(deleteOldContext)

   297         delete oldcx;

   298 }

   299 

   300 void QGLWidgetPrivate::init(QGLContext *context, const QGLWidget* shareWidget)

   301 {

   302     Q_Q(QGLWidget);

   303 

   304     QGLScreen *glScreen = glScreenForDevice(q);

   305     if (glScreen) {

   306         wsurf = static_cast<QWSGLWindowSurface*>(glScreen->createSurface(q));

   307         q->setWindowSurface(wsurf);

   308     }

   309 

   310     initContext(context, shareWidget);

   311 

   312     if(q->isValid() && glcx->format().hasOverlay()) {

   313         //no overlay

   314         qWarning("QtOpenGL ES doesn't currently support overlays");

   315     }

   316 }

   317 

   318 void QGLWidgetPrivate::cleanupColormaps()

   319 {

   320 }

   321 

   322 const QGLColormap & QGLWidget::colormap() const

   323 {

   324     return d_func()->cmap;

   325 }

   326 

   327 void QGLWidget::setColormap(const QGLColormap &)

   328 {

   329 }

   330 

   331 QT_END_NAMESPACE