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1/****************************************************************************
2**
3** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
4** Contact: http://www.qt-project.org/legal
5**
6** This file is part of the QtOpenGL module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
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14** conditions see http://qt.digia.com/licensing. For further information
15** use the contact form at http://qt.digia.com/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 2.1 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 2.1 requirements
23** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
24**
25** In addition, as a special exception, Digia gives you certain additional
26** rights. These rights are described in the Digia Qt LGPL Exception
27** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
28**
29** GNU General Public License Usage
30** Alternatively, this file may be used under the terms of the GNU
31** General Public License version 3.0 as published by the Free Software
32** Foundation and appearing in the file LICENSE.GPL included in the
33** packaging of this file. Please review the following information to
34** ensure the GNU General Public License version 3.0 requirements will be
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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
63QT_BEGIN_NAMESPACE
64
65static 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
90class QGLTemporaryContextPrivate
91{
92public:
93 QGLWidget *widget;
94};
95
96QGLTemporaryContext::QGLTemporaryContext(bool, QWidget *)
97 : d(new QGLTemporaryContextPrivate)
98{
99 d->widget = new QGLWidget;
100 d->widget->makeCurrent();
101}
102
103QGLTemporaryContext::~QGLTemporaryContext()
104{
105 delete d->widget;
106}
107
108/*****************************************************************************
109 QOpenGL debug facilities
110 *****************************************************************************/
111//#define DEBUG_OPENGL_REGION_UPDATE
112
113bool QGLFormat::hasOpenGLOverlays()
114{
115 QGLScreen *glScreen = glScreenForDevice(0);
116 if (glScreen)
117 return (glScreen->options() & QGLScreen::Overlays);
118 else
119 return false;
120}
121
122static EGLSurface qt_egl_create_surface
123 (QEglContext *context, QPaintDevice *device,
124 const QEglProperties *properties = 0)
125{
126 // Get the screen surface functions, which are used to create native ids.
127 QGLScreen *glScreen = glScreenForDevice(device);
128 if (!glScreen)
129 return EGL_NO_SURFACE;
130 QGLScreenSurfaceFunctions *funcs = glScreen->surfaceFunctions();
131 if (!funcs)
132 return EGL_NO_SURFACE;
133
134 // Create the native drawable for the paint device.
135 int devType = device->devType();
136 EGLNativePixmapType pixmapDrawable = 0;
137 EGLNativeWindowType windowDrawable = 0;
138 bool ok;
139 if (devType == QInternal::Pixmap) {
140 ok = funcs->createNativePixmap(static_cast<QPixmap *>(device), &pixmapDrawable);
141 } else if (devType == QInternal::Image) {
142 ok = funcs->createNativeImage(static_cast<QImage *>(device), &pixmapDrawable);
143 } else {
144 ok = funcs->createNativeWindow(static_cast<QWidget *>(device), &windowDrawable);
145 }
146 if (!ok) {
147 qWarning("QEglContext::createSurface(): Cannot create the native EGL drawable");
148 return EGL_NO_SURFACE;
149 }
150
151 // Create the EGL surface to draw into, based on the native drawable.
152 const EGLint *props;
153 if (properties)
154 props = properties->properties();
155 else
156 props = 0;
157 EGLSurface surf;
158 if (devType == QInternal::Widget) {
159 surf = eglCreateWindowSurface
160 (context->display(), context->config(), windowDrawable, props);
161 } else {
162 surf = eglCreatePixmapSurface
163 (context->display(), context->config(), pixmapDrawable, props);
164 }
165 if (surf == EGL_NO_SURFACE)
166 qWarning("QEglContext::createSurface(): Unable to create EGL surface, error = 0x%x", eglGetError());
167 return surf;
168}
169
170bool QGLContext::chooseContext(const QGLContext* shareContext)
171{
172 Q_D(QGLContext);
173
174 // Validate the device.
175 if (!device())
176 return false;
177 int devType = device()->devType();
178 if (devType != QInternal::Pixmap && devType != QInternal::Image && devType != QInternal::Widget) {
179 qWarning("QGLContext::chooseContext(): Cannot create QGLContext's for paint device type %d", devType);
180 return false;
181 }
182
183 // Get the display and initialize it.
184 d->eglContext = new QEglContext();
185 d->ownsEglContext = true;
186 d->eglContext->setApi(QEgl::OpenGL);
187
188 // Construct the configuration we need for this surface.
189 QEglProperties configProps;
190 qt_eglproperties_set_glformat(configProps, d->glFormat);
191 configProps.setDeviceType(devType);
192 configProps.setPaintDeviceFormat(device());
193 configProps.setRenderableType(QEgl::OpenGL);
194
195 // Search for a matching configuration, reducing the complexity
196 // each time until we get something that matches.
197 if (!d->eglContext->chooseConfig(configProps)) {
198 delete d->eglContext;
199 d->eglContext = 0;
200 return false;
201 }
202
203 // Inform the higher layers about the actual format properties.
204 qt_glformat_from_eglconfig(d->glFormat, d->eglContext->config());
205
206 // Create a new context for the configuration.
207 if (!d->eglContext->createContext
208 (shareContext ? shareContext->d_func()->eglContext : 0)) {
209 delete d->eglContext;
210 d->eglContext = 0;
211 return false;
212 }
213 d->sharing = d->eglContext->isSharing();
214 if (d->sharing && shareContext)
215 const_cast<QGLContext *>(shareContext)->d_func()->sharing = true;
216
217#if defined(EGL_VERSION_1_1)
218 if (d->glFormat.swapInterval() != -1 && devType == QInternal::Widget)
219 eglSwapInterval(d->eglContext->display(), d->glFormat.swapInterval());
220#endif
221
222 // Create the EGL surface to draw into. We cannot use
223 // QEglContext::createSurface() because it does not have
224 // access to the QGLScreen.
225 d->eglSurface = qt_egl_create_surface(d->eglContext, device());
226 if (d->eglSurface == EGL_NO_SURFACE) {
227 delete d->eglContext;
228 d->eglContext = 0;
229 return false;
230 }
231
232 return true;
233}
234
235
236bool QGLWidget::event(QEvent *e)
237{
238 return QWidget::event(e);
239}
240
241
242void QGLWidget::resizeEvent(QResizeEvent *)
243{
244 Q_D(QGLWidget);
245 if (!isValid())
246 return;
247 makeCurrent();
248 if (!d->glcx->initialized())
249 glInit();
250 resizeGL(width(), height());
251 //handle overlay
252}
253
254const QGLContext* QGLWidget::overlayContext() const
255{
256 return 0;
257}
258
259void QGLWidget::makeOverlayCurrent()
260{
261 //handle overlay
262}
263
264void QGLWidget::updateOverlayGL()
265{
266 //handle overlay
267}
268
269void QGLWidget::setContext(QGLContext *context, const QGLContext* shareContext, bool deleteOldContext)
270{
271 Q_D(QGLWidget);
272 if(context == 0) {
273 qWarning("QGLWidget::setContext: Cannot set null context");
274 return;
275 }
276
277 if(d->glcx)
278 d->glcx->doneCurrent();
279 QGLContext* oldcx = d->glcx;
280 d->glcx = context;
281 if(!d->glcx->isValid())
282 d->glcx->create(shareContext ? shareContext : oldcx);
283 if(deleteOldContext)
284 delete oldcx;
285}
286
287void QGLWidgetPrivate::init(QGLContext *context, const QGLWidget* shareWidget)
288{
289 Q_Q(QGLWidget);
290
291 QGLScreen *glScreen = glScreenForDevice(q);
292 if (glScreen) {
293 wsurf = static_cast<QWSGLWindowSurface*>(glScreen->createSurface(q));
294 q->setWindowSurface(wsurf);
295 }
296
297 initContext(context, shareWidget);
298
299 if(q->isValid() && glcx->format().hasOverlay()) {
300 //no overlay
301 qWarning("QtOpenGL ES doesn't currently support overlays");
302 }
303}
304
305void QGLWidgetPrivate::cleanupColormaps()
306{
307}
308
309const QGLColormap & QGLWidget::colormap() const
310{
311 return d_func()->cmap;
312}
313
314void QGLWidget::setColormap(const QGLColormap &)
315{
316}
317
318QT_END_NAMESPACE
319

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