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/***************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation
**
** This library is free software; you can redistribute it and/or
** modify it 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.
**
****************************************************************************/
#include "mlivepixmap.h"
#include "../private/qimage_p.h"
#include "../private/qpixmap_raster_p.h"
#include "mlivepixmap_p.h"
#include "mliveimage_p.h"
#include <QSharedMemory>
/* MLivePixmapPrivate */
MLivePixmapPrivate::MLivePixmapPrivate() : shm(0), shmSerial(0), owns(true), parentImage(0)
{
}
void MLivePixmapPrivate::copyBackFrom(const void *raw)
{
Q_Q(MLivePixmap);
q->detach();
shm->lock();
uchar *dest = ((uchar *) shm->data()) + (2 * sizeof(int));
memcpy(dest, raw, q->width() * q->height() * 4);
shm->unlock();
}
MLivePixmapPrivate::~MLivePixmapPrivate()
{
Q_Q(MLivePixmap);
if (parentImage)
parentImage->d_ptr->detachPixmap(q);
if (shm)
shm->detach();
if (owns)
delete shm;
}
/* MLivePixmap */
MLivePixmap::MLivePixmap(QPixmapData *p) : QPixmap(p), d_ptr(new MLivePixmapPrivate())
{
Q_D(MLivePixmap);
d->q_ptr = this;
}
MLivePixmap* MLivePixmap::fromLiveImage(MLiveImage *liveImage)
{
static int counter = 100;
QSharedMemory *shm = NULL;
uchar* imgData = NULL;
int *header = NULL;
int w = liveImage->width();
int h = liveImage->height();
counter++;
shm = new QSharedMemory(QString("MLivePixmap%1").arg(counter));
shm->create((w * h * 4) + 2 * sizeof(int)); // +2 to store width & height
shm->attach();
imgData = ((uchar *) shm->data()) + (2 * sizeof(int));
header = (int *) shm->data();
header[0] = w;
header[1] = h;
QImage img(imgData, w, h, QImage::Format_ARGB32_Premultiplied);
QPixmapData *pmd = new QRasterPixmapData(QPixmapData::PixmapType);
pmd->fromImage(img, Qt::NoOpaqueDetection);
MLivePixmap *livePixmap = new MLivePixmap(pmd);
livePixmap->d_ptr->shm = shm;
livePixmap->d_ptr->owns = true;
livePixmap->d_ptr->shmSerial = counter;
livePixmap->d_ptr->parentImage = liveImage;
liveImage->d_ptr->attachPixmap(livePixmap);
return livePixmap;
}
MLivePixmap* MLivePixmap::fromHandle(Qt::HANDLE handle)
{
QSharedMemory *shm = NULL;
int *header;
int width;
int height;
uchar* imgData;
shm = new QSharedMemory(QString("MLivePixmap%1").arg(handle));
shm->attach();
shm->lock();
header = (int *) shm->data();
width = header[0];
height = header[1];
shm->unlock();
imgData = ((uchar *) shm->data()) + (2 * sizeof(int));
QImage img(imgData, width, height, QImage::Format_ARGB32_Premultiplied);
QPixmapData *pmd = new QRasterPixmapData(QPixmapData::PixmapType);
pmd->fromImage(img, Qt::NoOpaqueDetection);
MLivePixmap *livePixmap = new MLivePixmap(pmd);
livePixmap->d_ptr->shm = shm;
livePixmap->d_ptr->owns = false;
livePixmap->d_ptr->shmSerial = handle;
return livePixmap;
}
MLivePixmap::~MLivePixmap()
{
}
Qt::HANDLE MLivePixmap::handle()
{
Q_D(MLivePixmap);
return d->shmSerial;
}
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