diff options
author | Jani Hautakangas <jani.hautakangas@nokia.com> | 2011-03-07 22:26:05 (GMT) |
---|---|---|
committer | Jani Hautakangas <jani.hautakangas@nokia.com> | 2011-03-15 17:09:32 (GMT) |
commit | 2355774b061d9e7213634ddec3c50280c4b10b70 (patch) | |
tree | b7f1b95a4839c2f6cc4f0cd119fd31aeb3929c15 /src/opengl/qgltexturepool_p.h | |
parent | b3b332a50a6288164ca86d0691e9615f9c19abda (diff) | |
download | Qt-2355774b061d9e7213634ddec3c50280c4b10b70.zip Qt-2355774b061d9e7213634ddec3c50280c4b10b70.tar.gz Qt-2355774b061d9e7213634ddec3c50280c4b10b70.tar.bz2 |
Initial implementation of GLES2.0 resource pooling
Keep the implementation in separate
qpixmapdata_poolgl.cpp file until the pooling has
been verified and confirmed to work ok.
Task-number: QTBUG-15253 QTBUG-17850
Reviewed-by: Samuel Rødal
Diffstat (limited to 'src/opengl/qgltexturepool_p.h')
-rw-r--r-- | src/opengl/qgltexturepool_p.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/opengl/qgltexturepool_p.h b/src/opengl/qgltexturepool_p.h new file mode 100644 index 0000000..8b6f726 --- /dev/null +++ b/src/opengl/qgltexturepool_p.h @@ -0,0 +1,147 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtOpenVG module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QGLTEXTUREPOOL_P_H +#define QGLTEXTUREPOOL_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists for the convenience +// of other Qt classes. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include "qgl.h" +#include <QtCore/qscopedpointer.h> + +QT_BEGIN_NAMESPACE + +class QGLPixmapData; +class QGLTexturePoolPrivate; + +class QGLTexturePool +{ +public: + QGLTexturePool(); + virtual ~QGLTexturePool(); + + static QGLTexturePool *instance(); + + // Create a new texture with the specified parameters and associate + // it with "data". The QGLPixmapData will be notified when the + // texture needs to be reclaimed by the pool. + // + // This function will call reclaimSpace() when texture creation fails. + GLuint createTextureForPixmap(GLenum target, + GLint level, + GLint internalformat, + GLsizei width, + GLsizei height, + GLenum format, + GLenum type, + QGLPixmapData *data); + + // Create a permanent texture with the specified parameters. + // If there is insufficient space for the texture, + // then this function will call reclaimSpace() and try again. + // + // The caller is responsible for calling glDeleteTextures() + // when it no longer needs the texture, as the texture is not + // recorded in the texture pool. + bool createPermanentTexture(GLuint texture, + GLenum target, + GLint level, + GLint internalformat, + GLsizei width, + GLsizei height, + GLenum format, + GLenum type, + const GLvoid *data); + + // Release a texture that is no longer required. + void releaseTexture(QGLPixmapData *data, GLuint texture); + + // Notify the pool that a QGLPixmapData object is using + // an texture again. This allows the pool to move the texture + // within a least-recently-used list of QGLPixmapData objects. + void useTexture(QGLPixmapData *data); + + // Notify the pool that the texture associated with a + // QGLPixmapData is being detached from the pool. The caller + // will become responsible for calling glDeleteTextures(). + void detachTexture(QGLPixmapData *data); + + // Reclaim space for an image allocation with the specified parameters. + // Returns true if space was reclaimed, or false if there is no + // further space that can be reclaimed. The "data" parameter + // indicates the pixmap that is trying to obtain space which should + // not itself be reclaimed. + bool reclaimSpace(GLint internalformat, + GLsizei width, + GLsizei height, + GLenum format, + GLenum type, + QGLPixmapData *data); + + // Hibernate the image pool because the context is about to be + // destroyed. All textures left in the pool should be released. + void hibernate(); + +protected: + // Helper functions for managing the LRU list of QGLPixmapData objects. + void moveToHeadOfLRU(QGLPixmapData *data); + void removeFromLRU(QGLPixmapData *data); + QGLPixmapData *pixmapLRU(); + +private: + QScopedPointer<QGLTexturePoolPrivate> d_ptr; + + Q_DECLARE_PRIVATE(QGLTexturePool) + Q_DISABLE_COPY(QGLTexturePool) +}; + +QT_END_NAMESPACE + +#endif |