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-rw-r--r--src/plugins/platforms/xlib/qxlibbackingstore.cpp223
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diff --git a/src/plugins/platforms/xlib/qxlibbackingstore.cpp b/src/plugins/platforms/xlib/qxlibbackingstore.cpp
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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.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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 &region, 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 &region)
+{
+ 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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