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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwindowseglcontext.h"
+#include "qwindowscontext.h"
+#include "qwindowswindow.h"
+
+#include <QtCore/QDebug>
+#include <QtGui/QOpenGLContext>
+
+#include <QtPlatformSupport/private/qeglconvenience_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+ \class QWindowsEGLStaticContext
+ \brief Static data for QWindowsEGLContext.
+
+ Keeps the display. The class is shared via
+ QSharedPointer in the windows, the contexts
+ and in QWindowsIntegration. The display will
+ be closed if the last instance is deleted.
+
+ \internal
+ \ingroup qt-lighthouse-win
+*/
+
+QWindowsEGLStaticContext::QWindowsEGLStaticContext(EGLDisplay display, int version)
+ : m_display(display), m_version(version)
+{
+}
+
+QWindowsEGLStaticContext *QWindowsEGLStaticContext::create()
+{
+ const HDC dc = QWindowsContext::instance()->displayContext();
+ if (!dc){
+ qWarning("%s: No Display", Q_FUNC_INFO);
+ return 0;
+ }
+
+ EGLDisplay display = eglGetDisplay((EGLNativeDisplayType)dc);
+ if (!display) {
+ qWarning("%s: Could not obtain EGL display", Q_FUNC_INFO);
+ return 0;
+ }
+
+ EGLint major;
+ EGLint minor;
+ if (!eglInitialize(display, &major, &minor)) {
+ qWarning("%s: Could not initialize egl display: error %d\n",
+ Q_FUNC_INFO, eglGetError());
+ return 0;
+ }
+ if (QWindowsContext::verboseGL)
+ qDebug("%s: Created EGL display %p v%d.%d",
+ __FUNCTION__, display, major, minor);
+ return new QWindowsEGLStaticContext(display, (major << 8) | minor);
+}
+
+QWindowsEGLStaticContext::~QWindowsEGLStaticContext()
+{
+ if (QWindowsContext::verboseGL)
+ qDebug("%s: Releasing EGL display %p", __FUNCTION__, m_display);
+ eglTerminate(m_display);
+}
+
+/*!
+ \class QWindowsEGLContext
+ \brief Open EGL context.
+
+ \section1 Using QWindowsEGLContext for Desktop with ANGLE
+ \section2 Build Instructions
+ \list
+ \o Install the Direct X SDK
+ \o Checkout and build ANGLE (SVN repository) as explained here:
+ \l{http://code.google.com/p/angleproject/wiki/DevSetup}{ANGLE-Project}.
+ When building for 64bit, de-activate the "WarnAsError" option
+ in every project file (as otherwise integer conversion
+ warnings will break the build).
+ \o Run configure.exe with the options "-opengl es2 -angle <path>".
+ \o Build qtbase and test some examples.
+ \endlist
+
+ \internal
+ \ingroup qt-lighthouse-win
+*/
+
+QWindowsEGLContext::QWindowsEGLContext(const QWindowsEGLStaticContextPtr &staticContext,
+ const QSurfaceFormat &format,
+ QPlatformOpenGLContext *share)
+ : QEGLPlatformContext(format, share, staticContext->display(), EGL_OPENGL_ES_API)
+ , m_staticContext(staticContext)
+{
+}
+
+QWindowsEGLContext::~QWindowsEGLContext()
+{
+}
+
+bool QWindowsEGLContext::hasThreadedOpenGLCapability()
+{
+#ifdef QT_OPENGL_ES_2_ANGLE
+ return false;
+#else
+ return true;
+#endif
+}
+
+EGLSurface QWindowsEGLContext::eglSurfaceForPlatformSurface(QPlatformSurface *surface)
+{
+ const QWindowsWindow *window = static_cast<const QWindowsWindow *>(surface);
+ return window->eglSurfaceHandle();
+}
+
+bool QWindowsEGLContext::makeCurrent(QPlatformSurface *surface)
+{
+ bool ok = false;
+ QWindowsWindow *window = static_cast<QWindowsWindow *>(surface);
+ if (EGLSurface eglSurface = window->ensureEglSurfaceHandle(m_staticContext, eglConfig())) {
+ ok = eglMakeCurrent(eglDisplay(), eglSurface, eglSurface, eglContext());
+ if (!ok)
+ qWarning("%s: eglMakeCurrent() failed, eglError: 0x%x, this: %p \n",
+ Q_FUNC_INFO, eglGetError(), this);
+ }
+ return ok;
+}
+
+QT_END_NAMESPACE