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/****************************************************************************
**
** 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 plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef XCBSHAREDBUFFERMANAGER_H
#define XCBSHAREDBUFFERMANAGER_H
#if defined(QT_USE_XCB_SHARED_GRAPHICS_CACHE)
#include <QtCore/qset.h>
#include <QtCore/qhash.h>
#include <QtCore/qsharedmemory.h>
#include <GLES2/gl2.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
class wl_resource;
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QXcbSharedBufferManager
{
public:
struct Buffer {
Buffer()
: width(-1)
, height(-1)
, bytesPerPixel(1)
, nextX(-1)
, nextY(-1)
, currentLineMaxHeight(0)
, next(0)
, prev(0)
, buffer(0)
, textureId(0)
{
}
~Buffer()
{
delete buffer;
if (textureId != 0)
glDeleteTextures(1, &textureId);
}
QByteArray cacheId;
int width;
int height;
int bytesPerPixel;
int nextX;
int nextY;
int currentLineMaxHeight;
Buffer *next;
Buffer *prev;
QSharedMemory *buffer;
GLuint textureId;
QAtomicInt ref;
};
typedef QHash<QByteArray, QSet<quint32> > PendingItemIds;
QXcbSharedBufferManager();
~QXcbSharedBufferManager();
void beginSharedBufferAction(const QByteArray &cacheId);
void insertItem(quint32 itemId, uchar *data, int itemWidth, int itemHeight);
void requestItems(const QSet<quint32> &itemIds);
void releaseItems(const QSet<quint32> &itemIds);
void endSharedBufferAction();
void getBufferForItem(const QByteArray &cacheId, quint32 itemId, Buffer **buffer,
int *x, int *y) const;
QPair<QByteArray, int> serializeBuffer(QSharedMemory *buffer) const;
PendingItemIds pendingItemsInvalidated() const
{
Q_ASSERT_X(m_currentCacheId.isEmpty(), Q_FUNC_INFO,
"Call endSharedBufferAction() before accessing data");
return m_pendingInvalidatedItems;
}
PendingItemIds pendingItemsReady() const
{
Q_ASSERT_X(m_currentCacheId.isEmpty(), Q_FUNC_INFO,
"Call endSharedBufferAction() before accessing data");
return m_pendingReadyItems;
}
PendingItemIds pendingItemsMissing() const
{
Q_ASSERT_X(m_currentCacheId.isEmpty(), Q_FUNC_INFO,
"Call endSharedBufferAction() before accessing data");
return m_pendingMissingItems;
}
private:
struct Item {
Item()
: next(0)
, prev(0)
, buffer(0)
, itemId(0)
, x(-1)
, y(-1)
, width(-1)
, height(-1)
{
}
Item *next;
Item *prev;
Buffer *buffer;
quint32 itemId;
int x;
int y;
int width;
int height;
};
struct Items
{
Items() : leastRecentlyUsed(0), mostRecentlyUsed(0) {}
Item *leastRecentlyUsed;
Item *mostRecentlyUsed;
QByteArray cacheId;
QHash<quint32, Item *> items;
};
void findAvailableBuffer(int itemWidth, int itemHeight, Buffer **buffer, int *x, int *y);
void recycleItem(Buffer **buffer, int *x, int *y);
void copyIntoBuffer(Buffer *buffer, int x, int y, int itemWidth, int itemHeight, uchar *data);
void touchBuffer(Buffer *buffer);
void deleteLeastRecentlyUsed();
Buffer *createNewBuffer(const QByteArray &cacheId, int heightRequired);
Buffer *resizeBuffer(Buffer *buffer, const QSize &newSize);
Buffer *allocateBuffer(int width, int height);
Items *itemsForCache(const QByteArray &cacheId) const;
void pushItemToBack(Items *items, Item *item);
void touchItem(Items *items, Item *item);
void deleteItem(Items *items, Item *item);
void recycleItem(const QByteArray &cacheId, Buffer **sharedBuffer, int *glyphX, int *glyphY);
QByteArray m_currentCacheId;
quint32 m_memoryUsed;
Buffer *m_mostRecentlyUsed;
Buffer *m_leastRecentlyUsed;
mutable QHash<QByteArray, Items *> m_items;
QMultiHash<QByteArray, Buffer *> m_buffers;
PendingItemIds m_pendingInvalidatedItems;
PendingItemIds m_pendingReadyItems;
PendingItemIds m_pendingMissingItems;
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // QT_USE_XCB_SHARED_GRAPHICS_CACHE
#endif // XCBSHAREDBUFFERMANAGER_H
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