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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 QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qdebug.h>
+#include "qnativeimage_p.h"
+#include "qcolormap.h"
+
+#include "private/qpaintengine_raster_p.h"
+
+#include "private/qapplication_p.h"
+#include "private/qgraphicssystem_p.h"
+
+#if defined(Q_WS_X11) && !defined(QT_NO_MITSHM)
+#include <qx11info_x11.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <qwidget.h>
+#endif
+
+#ifdef Q_WS_MAC
+#include <private/qpaintengine_mac_p.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#ifdef Q_WS_WIN
+typedef struct {
+ BITMAPINFOHEADER bmiHeader;
+ DWORD redMask;
+ DWORD greenMask;
+ DWORD blueMask;
+} BITMAPINFO_MASK;
+
+
+QNativeImage::QNativeImage(int width, int height, QImage::Format format, bool isTextBuffer, QWidget *)
+{
+#ifndef Q_WS_WINCE
+ Q_UNUSED(isTextBuffer);
+#endif
+ BITMAPINFO_MASK bmi;
+ memset(&bmi, 0, sizeof(bmi));
+ bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+ bmi.bmiHeader.biWidth = width;
+ bmi.bmiHeader.biHeight = -height;
+ bmi.bmiHeader.biPlanes = 1;
+ bmi.bmiHeader.biSizeImage = 0;
+
+ if (format == QImage::Format_RGB16) {
+ bmi.bmiHeader.biBitCount = 16;
+#ifdef Q_WS_WINCE
+ if (isTextBuffer) {
+ bmi.bmiHeader.biCompression = BI_RGB;
+ bmi.redMask = 0;
+ bmi.greenMask = 0;
+ bmi.blueMask = 0;
+ } else
+#endif
+ {
+ bmi.bmiHeader.biCompression = BI_BITFIELDS;
+ bmi.redMask = 0xF800;
+ bmi.greenMask = 0x07E0;
+ bmi.blueMask = 0x001F;
+ }
+ } else {
+ bmi.bmiHeader.biBitCount = 32;
+ bmi.bmiHeader.biCompression = BI_RGB;
+ bmi.redMask = 0;
+ bmi.greenMask = 0;
+ bmi.blueMask = 0;
+ }
+
+ HDC display_dc = GetDC(0);
+ hdc = CreateCompatibleDC(display_dc);
+ ReleaseDC(0, display_dc);
+ Q_ASSERT(hdc);
+
+ uchar *bits = 0;
+ bitmap = CreateDIBSection(hdc, reinterpret_cast<BITMAPINFO *>(&bmi), DIB_RGB_COLORS, (void**) &bits, 0, 0);
+ Q_ASSERT(bitmap);
+ Q_ASSERT(bits);
+
+ null_bitmap = (HBITMAP)SelectObject(hdc, bitmap);
+ image = QImage(bits, width, height, format);
+
+ Q_ASSERT(image.paintEngine()->type() == QPaintEngine::Raster);
+ static_cast<QRasterPaintEngine *>(image.paintEngine())->setDC(hdc);
+
+#ifndef Q_WS_WINCE
+ GdiFlush();
+#endif
+}
+
+QNativeImage::~QNativeImage()
+{
+ if (bitmap || hdc) {
+ Q_ASSERT(hdc);
+ Q_ASSERT(bitmap);
+ if (null_bitmap)
+ SelectObject(hdc, null_bitmap);
+ DeleteDC(hdc);
+ DeleteObject(bitmap);
+ }
+}
+
+QImage::Format QNativeImage::systemFormat()
+{
+ if (QColormap::instance().depth() == 16)
+ return QImage::Format_RGB16;
+ return QImage::Format_RGB32;
+}
+
+
+#elif defined(Q_WS_X11) && !defined(QT_NO_MITSHM)
+
+QNativeImage::QNativeImage(int width, int height, QImage::Format format,bool /* isTextBuffer */, QWidget *widget)
+ : xshmimg(0), xshmpm(0)
+{
+ if (!X11->use_mitshm) {
+ image = QImage(width, height, format);
+ // follow good coding practice and set xshminfo attributes, though values not used in this case
+ xshminfo.readOnly = true;
+ xshminfo.shmaddr = 0;
+ xshminfo.shmid = 0;
+ xshminfo.shmseg = 0;
+ return;
+ }
+
+ QX11Info info = widget->x11Info();
+
+ int dd = info.depth();
+ Visual *vis = (Visual*) info.visual();
+
+ xshmimg = XShmCreateImage(X11->display, vis, dd, ZPixmap, 0, &xshminfo, width, height);
+ if (!xshmimg) {
+ qWarning("QNativeImage: Unable to create shared XImage.");
+ return;
+ }
+
+ bool ok;
+ xshminfo.shmid = shmget(IPC_PRIVATE, xshmimg->bytes_per_line * xshmimg->height,
+ IPC_CREAT | 0777);
+ ok = xshminfo.shmid != -1;
+ if (ok) {
+ xshmimg->data = (char*)shmat(xshminfo.shmid, 0, 0);
+ xshminfo.shmaddr = xshmimg->data;
+ ok = (xshminfo.shmaddr != (char*)-1);
+ if (ok)
+ image = QImage((uchar *)xshmimg->data, width, height, format);
+ }
+ xshminfo.readOnly = false;
+ if (ok) {
+ ok = XShmAttach(X11->display, &xshminfo);
+ XSync(X11->display, False);
+ if (shmctl(xshminfo.shmid, IPC_RMID, 0) == -1)
+ qWarning() << "Error while marking the shared memory segment to be destroyed";
+ }
+ if (!ok) {
+ qWarning() << "QNativeImage: Unable to attach to shared memory segment.";
+ if (xshmimg->data) {
+ free(xshmimg->data);
+ xshmimg->data = 0;
+ }
+ XDestroyImage(xshmimg);
+ xshmimg = 0;
+ if (xshminfo.shmaddr)
+ shmdt(xshminfo.shmaddr);
+ if (xshminfo.shmid != -1)
+ shmctl(xshminfo.shmid, IPC_RMID, 0);
+ return;
+ }
+ if (X11->use_mitshm_pixmaps) {
+ xshmpm = XShmCreatePixmap(X11->display, DefaultRootWindow(X11->display), xshmimg->data,
+ &xshminfo, width, height, dd);
+ if (!xshmpm) {
+ qWarning() << "QNativeImage: Unable to create shared Pixmap.";
+ }
+ }
+}
+
+
+QNativeImage::~QNativeImage()
+{
+ if (!xshmimg)
+ return;
+
+ if (xshmpm) {
+ XFreePixmap(X11->display, xshmpm);
+ xshmpm = 0;
+ }
+ XShmDetach(X11->display, &xshminfo);
+ xshmimg->data = 0;
+ XDestroyImage(xshmimg);
+ xshmimg = 0;
+ shmdt(xshminfo.shmaddr);
+ shmctl(xshminfo.shmid, IPC_RMID, 0);
+}
+
+QImage::Format QNativeImage::systemFormat()
+{
+ if (QX11Info::appDepth() == 16)
+ return QImage::Format_RGB16;
+ return QImage::Format_RGB32;
+}
+
+#elif defined(Q_WS_MAC)
+
+QNativeImage::QNativeImage(int width, int height, QImage::Format format, bool /* isTextBuffer */, QWidget *widget)
+ : image(width, height, format)
+{
+
+ uint cgflags = kCGImageAlphaNoneSkipFirst;
+ switch (format) {
+ case QImage::Format_ARGB32:
+ cgflags = kCGImageAlphaFirst;
+ break;
+ case QImage::Format_ARGB32_Premultiplied:
+ case QImage::Format_ARGB8565_Premultiplied:
+ case QImage::Format_ARGB6666_Premultiplied:
+ case QImage::Format_ARGB8555_Premultiplied:
+ case QImage::Format_ARGB4444_Premultiplied:
+ cgflags = kCGImageAlphaPremultipliedFirst;
+ break;
+ default:
+ break;
+ }
+
+#ifdef kCGBitmapByteOrder32Host //only needed because CGImage.h added symbols in the minor version
+ cgflags |= kCGBitmapByteOrder32Host;
+#endif
+
+ cg = CGBitmapContextCreate(image.bits(), width, height, 8, image.bytesPerLine(),
+ QCoreGraphicsPaintEngine::macDisplayColorSpace(widget), cgflags);
+ CGContextTranslateCTM(cg, 0, height);
+ CGContextScaleCTM(cg, 1, -1);
+
+ Q_ASSERT(image.paintEngine()->type() == QPaintEngine::Raster);
+ static_cast<QRasterPaintEngine *>(image.paintEngine())->setCGContext(cg);
+}
+
+
+QNativeImage::~QNativeImage()
+{
+ CGContextRelease(cg);
+}
+
+QImage::Format QNativeImage::systemFormat()
+{
+ return QImage::Format_RGB32;
+}
+
+
+#else // other platforms...
+
+QNativeImage::QNativeImage(int width, int height, QImage::Format format, bool /* isTextBuffer */, QWidget *)
+ : image(width, height, format)
+{
+
+}
+
+
+QNativeImage::~QNativeImage()
+{
+}
+
+QImage::Format QNativeImage::systemFormat()
+{
+#ifdef Q_WS_QPA
+ return QApplicationPrivate::platformIntegration()->screens().at(0)->format();
+#else
+ return QImage::Format_RGB32;
+#endif
+}
+
+#endif // platforms
+
+QT_END_NAMESPACE
+
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