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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt scene graph research project.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 QSGTEXTUREMANAGER_H
#define QSGTEXTUREMANAGER_H
#include "qmlscene_global.h"
#include "qsgcontext.h"
#include <QObject>
#include <QImage>
class QSGTextureManagerPrivate;
class QT_SCENEGRAPH_EXPORT QSGTexture : public QObject
{
Q_OBJECT
public:
enum Status {
Null,
Loading,
Ready,
Error
};
QSGTexture();
~QSGTexture();
void setTextureId(int id) { m_texture_id = id; }
int textureId() const { return m_texture_id; }
void setTextureSize(const QSize &size) { m_texture_size = size; }
QSize textureSize() const { return m_texture_size; }
void setAlphaChannel(bool hasAlpha) { m_has_alpha = hasAlpha; }
bool hasAlphaChannel() const { return m_has_alpha; }
void setOwnsTexture(bool does) { m_owns_texture = does; }
bool ownsTexture() const { return m_owns_texture; }
void setHasMipmaps(bool has) { m_has_mipmaps = has; }
bool hasMipmaps() const { return m_has_mipmaps; }
void setStatus(Status s);
Status status() const { return m_status; }
signals:
void statusChanged(int status);
// ### put into the private object...
public:
Status m_status;
int m_texture_id;
mutable int m_ref_count;
QSize m_texture_size;
uint m_has_alpha : 1;
uint m_owns_texture : 1;
uint m_has_mipmaps : 1;
friend class QSGTextureRef;
};
class QT_SCENEGRAPH_EXPORT QSGTextureRef
{
public:
QSGTextureRef()
: m_texture(0)
{
}
QSGTextureRef(const QSGTexture *texture, const QRectF &subrect = QRectF(0, 0, 1, 1))
: m_texture(texture)
, m_sub_rect(subrect)
{
if (texture)
++texture->m_ref_count;
}
QSGTextureRef(const QSGTextureRef &other)
: m_sub_rect(other.m_sub_rect)
{
m_texture = other.m_texture;
++m_texture->m_ref_count;
}
~QSGTextureRef()
{
deref();
}
void setSubRect(const QRectF &subrect) { m_sub_rect = subrect; }
QRectF subRect() const { return m_sub_rect; }
const QSGTexture *texture() const { return m_texture; }
const QSGTexture *operator->() const { return m_texture; }
QSGTextureRef &operator=(const QSGTextureRef &other)
{
++other.m_texture->m_ref_count;
deref();
m_texture = other.m_texture;
m_sub_rect = other.m_sub_rect;
return *this;
}
bool isNull() const { return m_texture == 0; }
private:
void deref() {
if (m_texture && !--m_texture->m_ref_count) {
delete m_texture;
}
}
const QSGTexture *m_texture;
QRectF m_sub_rect;
};
class QT_SCENEGRAPH_EXPORT QSGTextureManager : public QObject
{
Q_OBJECT
public:
QSGTextureManager();
virtual void setContext(QSGContext *context);
QSGContext *context() const;
virtual QSGTextureRef upload(const QImage &image);
virtual QSGTextureRef requestUpload(const QImage &image, const QObject *listener, const char *slot);
static void swizzleBGRAToRGBA(QImage *image);
private slots:
void processAsyncTextures();
private:
QSGTextureManagerPrivate *d;
};
#endif // QSGTEXTUREMANAGER_H
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