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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QEGLPLATFORMCONTEXT_H
#define QEGLPLATFORMCONTEXT_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qtextstream.h>
#include <qpa/qplatformwindow.h>
#include <qpa/qplatformopenglcontext.h>
#include <QtCore/qvariant.h>
#include <QtGui/private/qt_egl_p.h>
#include <QtGui/private/qopenglcontext_p.h>
QT_BEGIN_NAMESPACE
class Q_GUI_EXPORT QEGLPlatformContext : public QPlatformOpenGLContext,
public QPlatformInterface::QEGLContext
{
public:
enum Flag {
NoSurfaceless = 0x01
};
Q_DECLARE_FLAGS(Flags, Flag)
QEGLPlatformContext(const QSurfaceFormat &format, QPlatformOpenGLContext *share, EGLDisplay display,
EGLConfig *config = nullptr, Flags flags = { });
template <typename T>
static QOpenGLContext *createFrom(EGLContext context, EGLDisplay contextDisplay,
EGLDisplay platformDisplay, QOpenGLContext *shareContext)
{
if (!context)
return nullptr;
// A context belonging to a given EGLDisplay cannot be used with another one
if (contextDisplay != platformDisplay) {
qWarning("QEGLPlatformContext: Cannot adopt context from different display");
return nullptr;
}
QPlatformOpenGLContext *shareHandle = shareContext ? shareContext->handle() : nullptr;
auto *resultingContext = new QOpenGLContext;
auto *contextPrivate = QOpenGLContextPrivate::get(resultingContext);
auto *platformContext = new T;
platformContext->adopt(context, contextDisplay, shareHandle);
contextPrivate->adopt(platformContext);
return resultingContext;
}
~QEGLPlatformContext();
void initialize() override;
bool makeCurrent(QPlatformSurface *surface) override;
void doneCurrent() override;
void swapBuffers(QPlatformSurface *surface) override;
QFunctionPointer getProcAddress(const char *procName) override;
QSurfaceFormat format() const override;
bool isSharing() const override { return m_shareContext != EGL_NO_CONTEXT; }
bool isValid() const override { return m_eglContext != EGL_NO_CONTEXT; }
EGLContext nativeContext() const override { return eglContext(); }
EGLContext eglContext() const;
EGLDisplay eglDisplay() const;
EGLConfig eglConfig() const;
protected:
QEGLPlatformContext() {} // For adoption
virtual EGLSurface eglSurfaceForPlatformSurface(QPlatformSurface *surface) = 0;
virtual EGLSurface createTemporaryOffscreenSurface();
virtual void destroyTemporaryOffscreenSurface(EGLSurface surface);
virtual void runGLChecks();
private:
void adopt(EGLContext context, EGLDisplay display, QPlatformOpenGLContext *shareContext);
void updateFormatFromGL();
EGLContext m_eglContext;
EGLContext m_shareContext;
EGLDisplay m_eglDisplay;
EGLConfig m_eglConfig;
QSurfaceFormat m_format;
EGLenum m_api;
int m_swapInterval = -1;
bool m_swapIntervalEnvChecked = false;
int m_swapIntervalFromEnv = -1;
Flags m_flags;
bool m_ownsContext = false;
QList<EGLint> m_contextAttrs;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QEGLPlatformContext::Flags)
QT_END_NAMESPACE
#endif //QEGLPLATFORMCONTEXT_H
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