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qglframebufferobject.h 4.92 KiB
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/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the QtOpenGL module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL21$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QGLFRAMEBUFFEROBJECT_H
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#define QGLFRAMEBUFFEROBJECT_H
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#include <QtOpenGL/qgl.h>
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#include <QtGui/qpaintdevice.h>
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QT_BEGIN_NAMESPACE
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class QGLFramebufferObjectPrivate;
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class QGLFramebufferObjectFormat;
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class Q_OPENGL_EXPORT QGLFramebufferObject : public QPaintDevice
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{
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    Q_DECLARE_PRIVATE(QGLFramebufferObject)
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public:
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    enum Attachment {
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        NoAttachment,
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        CombinedDepthStencil,
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        Depth
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    };
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    QGLFramebufferObject(const QSize &size, GLenum target = GL_TEXTURE_2D);
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    QGLFramebufferObject(int width, int height, GLenum target = GL_TEXTURE_2D);
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    QGLFramebufferObject(const QSize &size, Attachment attachment,
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                         GLenum target = GL_TEXTURE_2D, GLenum internal_format = 0);
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    QGLFramebufferObject(int width, int height, Attachment attachment,
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                         GLenum target = GL_TEXTURE_2D, GLenum internal_format = 0);
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    QGLFramebufferObject(const QSize &size, const QGLFramebufferObjectFormat &format);
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    QGLFramebufferObject(int width, int height, const QGLFramebufferObjectFormat &format);
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    virtual ~QGLFramebufferObject();
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    QGLFramebufferObjectFormat format() const;
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bool isValid() const; bool isBound() const; bool bind(); bool release(); GLuint texture() const; QSize size() const; QImage toImage() const; Attachment attachment() const; QPaintEngine *paintEngine() const Q_DECL_OVERRIDE; GLuint handle() const; static bool bindDefault(); static bool hasOpenGLFramebufferObjects(); void drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D); void drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D); static bool hasOpenGLFramebufferBlit(); static void blitFramebuffer(QGLFramebufferObject *target, const QRect &targetRect, QGLFramebufferObject *source, const QRect &sourceRect, GLbitfield buffers = GL_COLOR_BUFFER_BIT, GLenum filter = GL_NEAREST); protected: int metric(PaintDeviceMetric metric) const Q_DECL_OVERRIDE; int devType() const Q_DECL_OVERRIDE { return QInternal::FramebufferObject; } private: Q_DISABLE_COPY(QGLFramebufferObject) QScopedPointer<QGLFramebufferObjectPrivate> d_ptr; friend class QGLPaintDevice; friend class QGLFBOGLPaintDevice; }; class QGLFramebufferObjectFormatPrivate; class Q_OPENGL_EXPORT QGLFramebufferObjectFormat { public: QGLFramebufferObjectFormat(); QGLFramebufferObjectFormat(const QGLFramebufferObjectFormat &other); QGLFramebufferObjectFormat &operator=(const QGLFramebufferObjectFormat &other); ~QGLFramebufferObjectFormat(); void setSamples(int samples); int samples() const; void setMipmap(bool enabled); bool mipmap() const; void setAttachment(QGLFramebufferObject::Attachment attachment); QGLFramebufferObject::Attachment attachment() const; void setTextureTarget(GLenum target); GLenum textureTarget() const; void setInternalTextureFormat(GLenum internalTextureFormat); GLenum internalTextureFormat() const; bool operator==(const QGLFramebufferObjectFormat& other) const; bool operator!=(const QGLFramebufferObjectFormat& other) const; private: QGLFramebufferObjectFormatPrivate *d; void detach(); };
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QT_END_NAMESPACE #endif // QGLFRAMEBUFFEROBJECT_H