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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qpa/qplatformopenglcontext.h>
#include <emscripten.h>
#include <emscripten/html5.h>
QT_BEGIN_NAMESPACE
class QPlatformScreen;
class QWasmOpenGLContext : public QPlatformOpenGLContext
{
public:
QWasmOpenGLContext(const QSurfaceFormat &format);
~QWasmOpenGLContext();
QSurfaceFormat format() const override;
void swapBuffers(QPlatformSurface *surface) override;
GLuint defaultFramebufferObject(QPlatformSurface *surface) const override;
bool makeCurrent(QPlatformSurface *surface) override;
void doneCurrent() override;
bool isSharing() const override;
bool isValid() const override;
QFunctionPointer getProcAddress(const char *procName) override;
private:
static bool isOpenGLVersionSupported(QSurfaceFormat format);
bool maybeCreateEmscriptenContext(QPlatformSurface *surface);
static EMSCRIPTEN_WEBGL_CONTEXT_HANDLE createEmscriptenContext(const QString &canvasId, QSurfaceFormat format);
QSurfaceFormat m_requestedFormat;
QPlatformScreen *m_screen = nullptr;
EMSCRIPTEN_WEBGL_CONTEXT_HANDLE m_context = 0;
};
QT_END_NAMESPACE
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