/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <qdebug.h>+
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#include "qnativeimage_p.h"+
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#include "qcolormap.h"+
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+
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#include "private/qpaintengine_raster_p.h"+
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+
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#if defined(Q_WS_X11) && !defined(QT_NO_MITSHM)+
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#include <qx11info_x11.h>+
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#include <sys/ipc.h>+
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#include <sys/shm.h>+
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#include <qwidget.h>+
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#endif+
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+
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#ifdef Q_WS_MAC+
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#include <private/qpaintengine_mac_p.h>+
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#endif+
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+
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QT_BEGIN_NAMESPACE+
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+
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#ifdef Q_WS_WIN+
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typedef struct {+
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    BITMAPINFOHEADER bmiHeader;+
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    DWORD redMask;+
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    DWORD greenMask;+
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    DWORD blueMask;+
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} BITMAPINFO_MASK;+
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+
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+
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QNativeImage::QNativeImage(int width, int height, QImage::Format format, bool isTextBuffer, QWidget *)+
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{+
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#ifndef Q_WS_WINCE+
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    Q_UNUSED(isTextBuffer);+
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#endif+
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    BITMAPINFO_MASK bmi;+
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    memset(&bmi, 0, sizeof(bmi));+
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    bmi.bmiHeader.biSize        = sizeof(BITMAPINFOHEADER);+
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    bmi.bmiHeader.biWidth       = width;+
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    bmi.bmiHeader.biHeight      = -height;+
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    bmi.bmiHeader.biPlanes      = 1;+
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    bmi.bmiHeader.biSizeImage   = 0;+
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+
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    if (format == QImage::Format_RGB16) {+
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        bmi.bmiHeader.biBitCount = 16;+
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#ifdef Q_WS_WINCE+
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        if (isTextBuffer) {+
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            bmi.bmiHeader.biCompression = BI_RGB;+
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            bmi.redMask = 0;+
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            bmi.greenMask = 0;+
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            bmi.blueMask = 0;+
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        } else+
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#endif+
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        {+
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            bmi.bmiHeader.biCompression = BI_BITFIELDS;+
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            bmi.redMask = 0xF800;+
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            bmi.greenMask = 0x07E0;+
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            bmi.blueMask = 0x001F;+
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        }+
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    } else {+
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        bmi.bmiHeader.biBitCount    = 32;+
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        bmi.bmiHeader.biCompression = BI_RGB;+
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        bmi.redMask = 0;+
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        bmi.greenMask = 0;+
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        bmi.blueMask = 0;+
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    }+
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+
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    HDC display_dc = GetDC(0);+
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    hdc = CreateCompatibleDC(display_dc);+
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    ReleaseDC(0, display_dc);+
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    Q_ASSERT(hdc);+
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+
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    uchar *bits = 0;+
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    bitmap = CreateDIBSection(hdc, reinterpret_cast<BITMAPINFO *>(&bmi), DIB_RGB_COLORS, (void**) &bits, 0, 0);+
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    Q_ASSERT(bitmap);+
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    Q_ASSERT(bits);+
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+
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    null_bitmap = (HBITMAP)SelectObject(hdc, bitmap);+
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    image = QImage(bits, width, height, format);+
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+
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    Q_ASSERT(image.paintEngine()->type() == QPaintEngine::Raster);+
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    static_cast<QRasterPaintEngine *>(image.paintEngine())->setDC(hdc);+
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+
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#ifndef Q_WS_WINCE+
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    GdiFlush();+
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#endif+
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}+
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+
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QNativeImage::~QNativeImage()+
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{+
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    if (bitmap || hdc) {+
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        Q_ASSERT(hdc);+
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        Q_ASSERT(bitmap);+
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        if (null_bitmap)+
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            SelectObject(hdc, null_bitmap);+
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        DeleteDC(hdc);+
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        DeleteObject(bitmap);+
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    }+
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}+
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+
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QImage::Format QNativeImage::systemFormat()+
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{+
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    if (QColormap::instance().depth() == 16)+
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        return QImage::Format_RGB16;+
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    return QImage::Format_RGB32;+
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}+
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+
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+
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#elif defined(Q_WS_X11) && !defined(QT_NO_MITSHM)+
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+
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QNativeImage::QNativeImage(int width, int height, QImage::Format format,bool /* isTextBuffer */, QWidget *widget)+
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    : xshmimg(0), xshmpm(0)+
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{+
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    if (!X11->use_mitshm) {+
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        image = QImage(width, height, format);+
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        // follow good coding practice and set xshminfo attributes, though values not used in this case+
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        xshminfo.readOnly = true;+
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        xshminfo.shmaddr = 0;+
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        xshminfo.shmid = 0;+
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        xshminfo.shmseg = 0;+
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        return;+
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    }+
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+
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    QX11Info info = widget->x11Info();+
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+
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    int dd = info.depth();+
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    Visual *vis = (Visual*) info.visual();+
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+
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    xshmimg = XShmCreateImage(X11->display, vis, dd, ZPixmap, 0, &xshminfo, width, height);+
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    if (!xshmimg) {+
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        qWarning("QNativeImage: Unable to create shared XImage.");+
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        return;+
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    }+
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+
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    bool ok;+
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    xshminfo.shmid = shmget(IPC_PRIVATE, xshmimg->bytes_per_line * xshmimg->height,+
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                            IPC_CREAT | 0777);+
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    ok = xshminfo.shmid != -1;+
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    if (ok) {+
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        xshmimg->data = (char*)shmat(xshminfo.shmid, 0, 0);+
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        xshminfo.shmaddr = xshmimg->data;+
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        if (shmctl(xshminfo.shmid, IPC_RMID, 0) == -1)+
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            qWarning() << "Error while marking the shared memory segment to be destroyed";+
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        ok = (xshminfo.shmaddr != (char*)-1);+
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        if (ok)+
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            image = QImage((uchar *)xshmimg->data, width, height, systemFormat());+
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    }+
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    xshminfo.readOnly = false;+
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    if (ok)+
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        ok = XShmAttach(X11->display, &xshminfo);+
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    if (!ok) {+
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        qWarning() << "QNativeImage: Unable to attach to shared memory segment.";+
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        if (xshmimg->data) {+
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            free(xshmimg->data);+
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            xshmimg->data = 0;+
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        }+
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        XDestroyImage(xshmimg);+
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        xshmimg = 0;+
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        if (xshminfo.shmaddr)+
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            shmdt(xshminfo.shmaddr);+
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        if (xshminfo.shmid != -1)+
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            shmctl(xshminfo.shmid, IPC_RMID, 0);+
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        return;+
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    }+
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    if (X11->use_mitshm_pixmaps) {+
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        xshmpm = XShmCreatePixmap(X11->display, DefaultRootWindow(X11->display), xshmimg->data,+
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                                  &xshminfo, width, height, dd);+
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        if (!xshmpm) {+
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            qWarning() << "QNativeImage: Unable to create shared Pixmap.";+
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        }+
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    }+
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}+
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+
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+
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QNativeImage::~QNativeImage()+
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{+
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    if (!xshmimg)+
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        return;+
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+
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    if (xshmpm) {+
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        XFreePixmap(X11->display, xshmpm);+
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        xshmpm = 0;+
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    }+
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    XShmDetach(X11->display, &xshminfo);+
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    xshmimg->data = 0;+
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    XDestroyImage(xshmimg);+
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    xshmimg = 0;+
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    shmdt(xshminfo.shmaddr);+
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    shmctl(xshminfo.shmid, IPC_RMID, 0);+
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}+
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+
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QImage::Format QNativeImage::systemFormat()+
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{+
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    if (QX11Info::appDepth() == 16)+
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        return QImage::Format_RGB16;+
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    return QImage::Format_RGB32;+
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}+
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+
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#elif defined(Q_WS_MAC)+
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+
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QNativeImage::QNativeImage(int width, int height, QImage::Format format, bool /* isTextBuffer */, QWidget *widget)+
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    : image(width, height, format)+
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{+
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+
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+
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    uint cgflags = kCGImageAlphaNoneSkipFirst;+
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+
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#ifdef kCGBitmapByteOrder32Host //only needed because CGImage.h added symbols in the minor version+
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    cgflags |= kCGBitmapByteOrder32Host;+
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#endif+
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+
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    cg = CGBitmapContextCreate(image.bits(), width, height, 8, image.bytesPerLine(),+
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                               QCoreGraphicsPaintEngine::macDisplayColorSpace(widget), cgflags);+
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    CGContextTranslateCTM(cg, 0, height);+
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    CGContextScaleCTM(cg, 1, -1);+
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+
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    Q_ASSERT(image.paintEngine()->type() == QPaintEngine::Raster);+
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    static_cast<QRasterPaintEngine *>(image.paintEngine())->setCGContext(cg);+
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}+
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+
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+
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QNativeImage::~QNativeImage()+
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{+
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    CGContextRelease(cg);+
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}+
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+
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QImage::Format QNativeImage::systemFormat()+
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{+
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    return QImage::Format_RGB32;+
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}+
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+
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+
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#else // other platforms...+
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+
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QNativeImage::QNativeImage(int width, int height, QImage::Format format,  bool /* isTextBuffer */, QWidget *)+
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    : image(width, height, format)+
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{+
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+
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}+
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+
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+
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QNativeImage::~QNativeImage()+
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{+
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}+
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+
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QImage::Format QNativeImage::systemFormat()+
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{+
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    return QImage::Format_RGB32;+
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}+
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+
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#endif // platforms+
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+
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QT_END_NAMESPACE+
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+
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