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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCanvas3D 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the QtCanvas3D 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.
#ifndef CANVASRENDERER_P_H
#define CANVASRENDERER_P_H
#include "canvas3dcommon_p.h"
#include "contextattributes_p.h"
#include "glcommandqueue_p.h"
#include "glstatestore_p.h"
#include "canvas3d_p.h"
#include <QtCore/QElapsedTimer>
#include <QtGui/QOpenGLContext>
#include <QtGui/QOpenGLFunctions>
#include <QtGui/QOpenGLFramebufferObject>
#include <QtQuick/QQuickItem>
#include <QtCore/QMutex>
QT_BEGIN_NAMESPACE
class QOffscreenSurface;
class QQuickWindow;
class QOpenGLShaderProgram;
class QOpenGLShader;
QT_CANVAS3D_BEGIN_NAMESPACE
class QT_CANVAS3D_EXPORT CanvasRenderer : public QObject, QOpenGLFunctions
{
Q_OBJECT
Q_DISABLE_COPY(CanvasRenderer)
public:
CanvasRenderer(QObject *parent = 0);
~CanvasRenderer();
void resolveQtContext(QQuickWindow *window, const QSize &initializedSize,
Canvas::RenderTarget renderTarget);
void createContextShare();
void getQtContextAttributes(CanvasContextAttributes &contextAttributes);
void init(QQuickWindow *window, const CanvasContextAttributes &contextAttributes,
GLint &maxVertexAttribs, QSize &maxSize, int &contextVersion,
QSet<QByteArray> &extensions, bool &isCombinedDepthStencilSupported);
bool createContext(QQuickWindow *window, const CanvasContextAttributes &contextAttributes,
GLint &maxVertexAttribs, QSize &maxSize, int &contextVersion,
QSet<QByteArray> &extensions, bool &isCombinedDepthStencilSupported);
void createFBOs();
void bindCurrentRenderTarget();
void setFboSize(const QSize &fboSize);
QSize fboSize() const { return m_fboSize; }
uint fps() const { return m_fps; }
CanvasGlCommandQueue *commandQueue() { return &m_commandQueue; }
void transferCommands();
void makeCanvasContextCurrent();
void executeCommandQueue();
void executeSyncCommand(GlSyncCommand &command);
void finalizeTexture();
void restoreCanvasOpenGLState();
void resetQtOpenGLState();
int maxSamples() const { return m_maxSamples; }
bool isOpenGLES2() const { return m_isOpenGLES2; }
bool contextCreated() const { return (m_glContext != 0); }
bool qtContextResolved() const { return (m_glContextQt != 0); }
bool usingQtContext() const { return m_renderTarget != Canvas::RenderTargetOffscreenBuffer; }
void resolveMSAAFbo();
void deleteCommandData();
qint64 previousFrameTime();
void destroy();
public slots:
void shutDown();
void render();
void clearBackground();
signals:
void fpsChanged(uint fps);
void textureReady(int id, const QSize &size);
void textureIdResolved(QQuickItem *item);
private:
bool updateGlError(const char *funcName);
void multiplyAlpha();
QSize m_fboSize;
QSize m_initializedSize;
QOpenGLContext *m_glContext;
QOpenGLContext *m_glContextQt;
QOpenGLContext *m_glContextShare;
QQuickWindow *m_contextWindow;
Canvas::RenderTarget m_renderTarget;
GLStateStore *m_stateStore;
uint m_fps;
int m_maxSamples;
bool m_isOpenGLES2;
bool m_antialias;
bool m_preserveDrawingBuffer;
bool m_multiplyAlpha;
QOpenGLShaderProgram *m_alphaMultiplierProgram;
QOpenGLShader *m_alphaMultiplierVertexShader;
QOpenGLShader *m_alphaMultiplierFragmentShader;
GLuint m_alphaMultiplierVertexBuffer;
GLuint m_alphaMultiplierUVBuffer;
GLint m_alphaMultiplierVertexAttribute;
GLint m_alphaMultiplierUVAttribute;
QOpenGLFramebufferObject *m_antialiasFbo;
QOpenGLFramebufferObject *m_renderFbo;
QOpenGLFramebufferObject *m_displayFbo;
QOpenGLFramebufferObject *m_alphaMultiplierFbo;
QOpenGLFramebufferObjectFormat m_fboFormat;
QOpenGLFramebufferObjectFormat m_antialiasFboFormat;
bool m_recreateFbos;
bool m_verifyFboBinds;
QOffscreenSurface *m_offscreenSurface;
CanvasGlCommandQueue m_commandQueue;
QVector<GlCommand> m_executeQueue;
int m_executeQueueCount;
int m_executeStartIndex;
int m_executeEndIndex;
GLuint m_currentFramebufferId;
QRect m_forceViewportRect;
int m_glError;
QElapsedTimer m_fpsTimer;
QElapsedTimer m_frameTimer;
qint64 m_frameTimeMs;
int m_fpsFrames;
bool m_textureFinalized;
GLbitfield m_clearMask;
QMutex m_shutdownMutex;
};
QT_CANVAS3D_END_NAMESPACE
QT_END_NAMESPACE
#endif // CANVASRENDERER_P_H
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