1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtOpenGL module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QGLFRAMEBUFFEROBJECT_H 41 #define QGLFRAMEBUFFEROBJECT_H 42 43 #include <QtOpenGL/qgl.h> 44 #include <QtGui/qpaintdevice.h> 45 46 QT_BEGIN_NAMESPACE 47 48 49 class QGLFramebufferObjectPrivate; 50 class QGLFramebufferObjectFormat; 51 52 class Q_OPENGL_EXPORT QGLFramebufferObject : public QPaintDevice 53 { 54 Q_DECLARE_PRIVATE(QGLFramebufferObject) 55 public: 56 enum Attachment { 57 NoAttachment, 58 CombinedDepthStencil, 59 Depth 60 }; 61 62 QGLFramebufferObject(const QSize &size, GLenum target = GL_TEXTURE_2D); 63 QGLFramebufferObject(int width, int height, GLenum target = GL_TEXTURE_2D); 64 65 QGLFramebufferObject(const QSize &size, Attachment attachment, 66 GLenum target = GL_TEXTURE_2D, GLenum internal_format = 0); 67 QGLFramebufferObject(int width, int height, Attachment attachment, 68 GLenum target = GL_TEXTURE_2D, GLenum internal_format = 0); 69 70 QGLFramebufferObject(const QSize &size, const QGLFramebufferObjectFormat &format); 71 QGLFramebufferObject(int width, int height, const QGLFramebufferObjectFormat &format); 72 73 virtual ~QGLFramebufferObject(); 74 75 QGLFramebufferObjectFormat format() const; 76 77 bool isValid() const; 78 bool isBound() const; 79 bool bind(); 80 bool release(); 81 82 GLuint texture() const; 83 QSize size() const; 84 QImage toImage() const; 85 Attachment attachment() const; 86 87 QPaintEngine *paintEngine() const override; 88 GLuint handle() const; 89 90 static bool bindDefault(); 91 92 static bool hasOpenGLFramebufferObjects(); 93 94 void drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D); 95 void drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D); 96 97 static bool hasOpenGLFramebufferBlit(); 98 static void blitFramebuffer(QGLFramebufferObject *target, const QRect &targetRect, 99 QGLFramebufferObject *source, const QRect &sourceRect, 100 GLbitfield buffers = GL_COLOR_BUFFER_BIT, 101 GLenum filter = GL_NEAREST); 102 103 protected: 104 int metric(PaintDeviceMetric metric) const override; devType()105 int devType() const override { return QInternal::FramebufferObject; } 106 107 private: 108 Q_DISABLE_COPY(QGLFramebufferObject) 109 QScopedPointer<QGLFramebufferObjectPrivate> d_ptr; 110 friend class QGLPaintDevice; 111 friend class QGLFBOGLPaintDevice; 112 }; 113 114 class QGLFramebufferObjectFormatPrivate; 115 class Q_OPENGL_EXPORT QGLFramebufferObjectFormat 116 { 117 public: 118 QGLFramebufferObjectFormat(); 119 QGLFramebufferObjectFormat(const QGLFramebufferObjectFormat &other); 120 QGLFramebufferObjectFormat &operator=(const QGLFramebufferObjectFormat &other); 121 ~QGLFramebufferObjectFormat(); 122 123 void setSamples(int samples); 124 int samples() const; 125 126 void setMipmap(bool enabled); 127 bool mipmap() const; 128 129 void setAttachment(QGLFramebufferObject::Attachment attachment); 130 QGLFramebufferObject::Attachment attachment() const; 131 132 void setTextureTarget(GLenum target); 133 GLenum textureTarget() const; 134 135 void setInternalTextureFormat(GLenum internalTextureFormat); 136 GLenum internalTextureFormat() const; 137 138 bool operator==(const QGLFramebufferObjectFormat& other) const; 139 bool operator!=(const QGLFramebufferObjectFormat& other) const; 140 141 private: 142 QGLFramebufferObjectFormatPrivate *d; 143 144 void detach(); 145 }; 146 147 QT_END_NAMESPACE 148 149 #endif // QGLFRAMEBUFFEROBJECT_H 150