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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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, Digia gives you certain additional
+** rights. These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qioscontext.h"
+#include "qioswindow.h"
+
+#include <dlfcn.h>
+
+#include <QtGui/QOpenGlContext>
+
+#import <OpenGLES/EAGL.h>
+#import <QuartzCore/CAEAGLLayer.h>
+
+QIOSContext::QIOSContext(QOpenGLContext *context)
+ : QPlatformOpenGLContext()
+ , m_eaglContext([[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2])
+{
+ // Start out with the requested format
+ QSurfaceFormat format = context->format();
+
+ format.setRenderableType(QSurfaceFormat::OpenGLES);
+ format.setMajorVersion(2);
+ format.setMinorVersion(0);
+
+ // Even though iOS internally double-buffers its rendering, we
+ // report single-buffered here since the buffer remains unchanged
+ // when swapping unlesss you manually clear it yourself.
+ format.setSwapBehavior(QSurfaceFormat::SingleBuffer);
+
+ m_format = format;
+}
+
+QIOSContext::~QIOSContext()
+{
+ [m_eaglContext release];
+}
+
+QSurfaceFormat QIOSContext::format() const
+{
+ return m_format;
+}
+
+bool QIOSContext::makeCurrent(QPlatformSurface *surface)
+{
+ Q_ASSERT(surface && surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
+ [EAGLContext setCurrentContext:m_eaglContext];
+ glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebufferObject(surface));
+
+ return true;
+}
+
+void QIOSContext::doneCurrent()
+{
+ [EAGLContext setCurrentContext:nil];
+}
+
+void QIOSContext::swapBuffers(QPlatformSurface *surface)
+{
+ Q_ASSERT(surface && surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
+ [EAGLContext setCurrentContext:m_eaglContext];
+
+ GLint renderbuffer;
+ glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebufferObject(surface));
+ glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &renderbuffer);
+ glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
+
+ [m_eaglContext presentRenderbuffer:GL_RENDERBUFFER];
+}
+
+GLuint QIOSContext::defaultFramebufferObject(QPlatformSurface *surface) const
+{
+ return static_cast<QIOSWindow *>(surface)->framebufferObject(*const_cast<const QIOSContext*>(this));
+}
+
+QFunctionPointer QIOSContext::getProcAddress(const QByteArray& functionName)
+{
+ return reinterpret_cast<QFunctionPointer>(dlsym(RTLD_NEXT, functionName.constData()));
+}
+
+EAGLContext *QIOSContext::nativeContext() const
+{
+ return m_eaglContext;
+}