diff options
Diffstat (limited to 'src/gui/opengl/qopenglbuffer.cpp')
| -rw-r--r-- | src/gui/opengl/qopenglbuffer.cpp | 99 |
1 files changed, 74 insertions, 25 deletions
diff --git a/src/gui/opengl/qopenglbuffer.cpp b/src/gui/opengl/qopenglbuffer.cpp index a8a2255104..c8e3782274 100644 --- a/src/gui/opengl/qopenglbuffer.cpp +++ b/src/gui/opengl/qopenglbuffer.cpp @@ -1,40 +1,32 @@ /**************************************************************************** ** -** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the QtGui module of the Qt Toolkit. ** -** $QT_BEGIN_LICENSE:LGPL$ +** $QT_BEGIN_LICENSE:LGPL21$ ** 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 Digia. For licensing terms and -** conditions see http://qt.digia.com/licensing. For further information +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information ** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 2.1 requirements -** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Digia gives you certain additional -** rights. These rights are described in the Digia Qt LGPL Exception +** rights. These rights are described in the Digia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3.0 as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU General Public License version 3.0 requirements will be -** met: http://www.gnu.org/copyleft/gpl.html. -** -** ** $QT_END_LICENSE$ ** ****************************************************************************/ @@ -128,6 +120,18 @@ QT_BEGIN_NAMESPACE \value ReadWrite The buffer will be mapped for reading and writing. */ +/*! + \enum QOpenGLBuffer::RangeAccessFlag + This enum defines the access mode bits for QOpenGLBuffer::mapRange(). + + \value RangeRead The buffer will be mapped for reading. + \value RangeWrite The buffer will be mapped for writing. + \value RangeInvalidate Discard the previous contents of the specified range. + \value RangeInvalidateBuffer Discard the previous contents of the entire buffer. + \value RangeFlushExplicit Indicates that modifications are to be flushed explicitly via \c glFlushMappedBufferRange. + \value RangeUnsynchronized Indicates that pending operations should not be synchronized before returning from mapRange(). +*/ + class QOpenGLBufferPrivate { public: @@ -514,10 +518,14 @@ int QOpenGLBuffer::size() const It is assumed that create() has been called on this buffer and that it has been bound to the current context. - This function is only supported under OpenGL/ES if the - \c{GL_OES_mapbuffer} extension is present. + \note This function is only supported under OpenGL ES 2.0 or + earlier if the \c GL_OES_mapbuffer extension is present. - \sa unmap(), create(), bind() + \note On OpenGL ES 3.0 and newer, or, in case if desktop OpenGL, + if \c GL_ARB_map_buffer_range is supported, this function uses + \c glMapBufferRange instead of \c glMapBuffer. + + \sa unmap(), create(), bind(), mapRange() */ void *QOpenGLBuffer::map(QOpenGLBuffer::Access access) { @@ -528,7 +536,48 @@ void *QOpenGLBuffer::map(QOpenGLBuffer::Access access) #endif if (!d->guard || !d->guard->id()) return 0; - return d->funcs->glMapBuffer(d->type, access); + if (d->funcs->hasOpenGLExtension(QOpenGLExtensions::MapBufferRange)) { + QOpenGLBuffer::RangeAccessFlags rangeAccess = 0; + switch (access) { + case QOpenGLBuffer::ReadOnly: + rangeAccess = QOpenGLBuffer::RangeRead; + break; + case QOpenGLBuffer::WriteOnly: + rangeAccess = QOpenGLBuffer::RangeWrite; + break; + case QOpenGLBuffer::ReadWrite: + rangeAccess = QOpenGLBuffer::RangeRead | QOpenGLBuffer::RangeWrite; + break; + } + return d->funcs->glMapBufferRange(d->type, 0, size(), rangeAccess); + } else { + return d->funcs->glMapBuffer(d->type, access); + } +} + +/*! + Maps the range specified by \a offset and \a count of the contents + of this buffer into the application's memory space and returns a + pointer to it. Returns null if memory mapping is not possible. + The \a access parameter specifies a combination of access flags. + + It is assumed that create() has been called on this buffer and that + it has been bound to the current context. + + \note This function is not available on OpenGL ES 2.0 and earlier. + + \sa unmap(), create(), bind() + */ +void *QOpenGLBuffer::mapRange(int offset, int count, QOpenGLBuffer::RangeAccessFlags access) +{ + Q_D(QOpenGLBuffer); +#ifndef QT_NO_DEBUG + if (!isCreated()) + qWarning("QOpenGLBuffer::mapRange(): buffer not created"); +#endif + if (!d->guard || !d->guard->id()) + return 0; + return d->funcs->glMapBufferRange(d->type, offset, count, access); } /*! @@ -539,8 +588,8 @@ void *QOpenGLBuffer::map(QOpenGLBuffer::Access access) It is assumed that this buffer has been bound to the current context, and that it was previously mapped with map(). - This function is only supported under OpenGL/ES if the - \c{GL_OES_mapbuffer} extension is present. + \note This function is only supported under OpenGL ES 2.0 and + earlier if the \c{GL_OES_mapbuffer} extension is present. \sa map() */ |