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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** 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.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qxlibbackingstore.h"
#include "qxlibintegration.h"
#include <QtCore/qdebug.h>
#include <QWindowSystemInterface>
#include "qxlibwindow.h"
#include "qxlibscreen.h"
#include "qxlibdisplay.h"
#include "qpainter.h"
# include <sys/ipc.h>
# include <sys/shm.h>
# include <X11/extensions/XShm.h>
QT_BEGIN_NAMESPACE
struct QXlibShmImageInfo {
QXlibShmImageInfo(Display *xdisplay) : image(0), display(xdisplay) {}
~QXlibShmImageInfo() { destroy(); }
void destroy();
XShmSegmentInfo shminfo;
XImage *image;
Display *display;
};
#ifndef DONT_USE_MIT_SHM
void QXlibShmImageInfo::destroy()
{
XShmDetach (display, &shminfo);
XDestroyImage (image);
shmdt (shminfo.shmaddr);
shmctl (shminfo.shmid, IPC_RMID, 0);
}
#endif
void QXlibBackingStore::resizeShmImage(int width, int height)
{
QXlibScreen *screen = QXlibScreen::testLiteScreenForWidget(window());
QXlibWindow *win = static_cast<QXlibWindow*>(window()->handle());
QImage::Format format = win->depth() == 16 ? QImage::Format_RGB16 : QImage::Format_RGB32;
#ifdef DONT_USE_MIT_SHM
shm_img = QImage(width, height, format);
#else
if (image_info)
image_info->destroy();
else
image_info = new QXlibShmImageInfo(screen->display()->nativeDisplay());
XImage *image = XShmCreateImage (screen->display()->nativeDisplay(), win->visual(), win->depth(), ZPixmap, 0,
&image_info->shminfo, width, height);
image_info->shminfo.shmid = shmget (IPC_PRIVATE,
image->bytes_per_line * image->height, IPC_CREAT|0777);
image_info->shminfo.shmaddr = image->data = (char*)shmat (image_info->shminfo.shmid, 0, 0);
image_info->shminfo.readOnly = False;
image_info->image = image;
Status shm_attach_status = XShmAttach(screen->display()->nativeDisplay(), &image_info->shminfo);
Q_ASSERT(shm_attach_status == True);
shm_img = QImage((uchar*) image->data, image->width, image->height, image->bytes_per_line, format);
#endif
painted = false;
}
void QXlibBackingStore::resizeBuffer(QSize s)
{
if (shm_img.size() != s)
resizeShmImage(s.width(), s.height());
}
QSize QXlibBackingStore::bufferSize() const
{
return shm_img.size();
}
QXlibBackingStore::QXlibBackingStore(QWindow *window)
: QPlatformBackingStore(window),
painted(false), image_info(0)
{
xw = static_cast<QXlibWindow*>(window->handle());
// qDebug() << "QTestLiteWindowSurface::QTestLiteWindowSurface:" << xw->window;
}
QXlibBackingStore::~QXlibBackingStore()
{
delete image_info;
}
QPaintDevice *QXlibBackingStore::paintDevice()
{
return &shm_img;
}
void QXlibBackingStore::flush(QWindow *w, const QRegion ®ion, const QPoint &offset)
{
Q_UNUSED(region);
Q_UNUSED(offset);
if (!painted)
return;
QXlibScreen *screen = QXlibScreen::testLiteScreenForWidget(w);
GC gc = xw->graphicsContext();
Window window = xw->xWindow();
#ifdef DONT_USE_MIT_SHM
// just convert the image every time...
if (!shm_img.isNull()) {
QXlibWindow *win = static_cast<QXlibWindow*>(w->handle());
QImage image = shm_img;
//img.convertToFormat(
XImage *xi = XCreateImage(screen->display()->nativeDisplay(), win->visual(), win->depth(), ZPixmap,
0, (char *) image.scanLine(0), image.width(), image.height(),
32, image.bytesPerLine());
int x = 0;
int y = 0;
/*int r =*/ XPutImage(screen->display()->nativeDisplay(), window, gc, xi, 0, 0, x, y, image.width(), image.height());
xi->data = 0; // QImage owns these bits
XDestroyImage(xi);
}
#else
// Use MIT_SHM
if (image_info && image_info->image) {
//qDebug() << "Here we go" << image_info->image->width << image_info->image->height;
int x = 0;
int y = 0;
// We could set send_event to true, and then use the ShmCompletion to synchronize,
// but let's do like Qt/11 and just use XSync
XShmPutImage (screen->display()->nativeDisplay(), window, gc, image_info->image, 0, 0,
x, y, image_info->image->width, image_info->image->height,
/*send_event*/ False);
screen->display()->sync();
}
#endif
}
void QXlibBackingStore::resize(const QSize &size, const QRegion &)
{
resizeBuffer(size);
}
void QXlibBackingStore::beginPaint(const QRegion ®ion)
{
Q_UNUSED(region);
if (shm_img.hasAlphaChannel()) {
QPainter p(&shm_img);
p.setCompositionMode(QPainter::CompositionMode_Source);
const QVector<QRect> rects = region.rects();
const QColor blank = Qt::transparent;
for (QVector<QRect>::const_iterator it = rects.begin(); it != rects.end(); ++it) {
p.fillRect(*it, blank);
}
}
}
void QXlibBackingStore::endPaint()
{
painted = true; //there is content in the buffer
}
QT_END_NAMESPACE
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