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project/fm_viewer/fav/widget/QOpenGLWidget.h

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+/******************************************************************************
+    QtAV:  Multimedia framework based on Qt and FFmpeg
+    Copyright (C) 2012-2016 Wang Bin <wbsecg1@gmail.com>
+
+*   This file is part of QtAV (from 2015)
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+******************************************************************************/
+
+#ifndef QTAV_QOPENGLWIDGET_H
+#define QTAV_QOPENGLWIDGET_H
+#define REMOVE_OPENGL_WIDGET 1
+#if !(REMOVE_OPENGL_WIDGET)
+#include "global.h"
+#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
+#error "Qt5 is required!"
+#endif
+#include <QtGui/QOpenGLFunctions>
+#include <QtGui/QOpenGLPaintDevice>
+#include <QtGui/QSurfaceFormat>
+#include <QtWidgets/QWidget>
+
+
+
+namespace FAV {
+
+/*!
+ * \brief The QOpenGLWidget class
+ * A widget for rendering OpenGL graphics without QtOpenGL module
+ */
+class Q_AVWIDGETS_EXPORT QOpenGLWidget : public QWidget
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(QOpenGLWidget)
+public:
+    explicit QOpenGLWidget(QWidget* parent = 0, Qt::WindowFlags f = 0);
+    virtual ~QOpenGLWidget();
+    void setFormat(const QSurfaceFormat &format);
+    QSurfaceFormat format() const;
+    bool isValid() const;
+    void makeCurrent();
+    void doneCurrent();
+    QOpenGLContext *context() const;
+
+
+
+protected:
+    QPaintDevice* redirected(QPoint *offset) const Q_DECL_OVERRIDE;
+    virtual void initializeGL();
+    virtual void resizeGL(int w, int h);
+    virtual void paintGL();
+    void paintEvent(QPaintEvent *e) Q_DECL_OVERRIDE;
+    void resizeEvent(QResizeEvent *e) Q_DECL_OVERRIDE;
+private:
+    void initialize();
+    void render();
+    void invokeUserPaint();
+
+    bool m_initialized;
+    bool m_fakeHidden;
+    QOpenGLContext *m_context;
+    QOpenGLPaintDevice *m_paintDevice;
+    QSurfaceFormat m_requestedFormat;
+};
+} //namespace FAV
+
+#endif // @REMOVE_OPENGL_WIDGET
+#endif //QTAV_QOPENGLWIDGET_H