--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/painting/qwindowsurface_raster.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,416 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 <qglobal.h> // for Q_WS_WIN define (non-PCH)
+#ifdef Q_WS_WIN
+#include <qlibrary.h>
+#include <qt_windows.h>
+#endif
+
+#include <QtGui/qpaintdevice.h>
+#include <QtGui/qwidget.h>
+
+#include "private/qwindowsurface_raster_p.h"
+#include "private/qnativeimage_p.h"
+#include "private/qwidget_p.h"
+
+#ifdef Q_WS_X11
+#include "private/qpixmap_x11_p.h"
+#include "private/qt_x11_p.h"
+#include "private/qwidget_p.h"
+#include "qx11info_x11.h"
+#endif
+#include "private/qdrawhelper_p.h"
+
+#ifdef Q_WS_MAC
+#include <private/qt_cocoa_helpers_mac_p.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+class QRasterWindowSurfacePrivate
+{
+public:
+    QNativeImage *image;
+
+#ifdef Q_WS_X11
+    GC gc;
+#ifndef QT_NO_XRENDER
+    uint translucentBackground : 1;
+#endif
+#endif
+    uint inSetGeometry : 1;
+};
+
+QRasterWindowSurface::QRasterWindowSurface(QWidget *window)
+    : QWindowSurface(window), d_ptr(new QRasterWindowSurfacePrivate)
+{
+#ifdef Q_WS_X11
+    d_ptr->gc = XCreateGC(X11->display, window->handle(), 0, 0);
+#ifndef QT_NO_XRENDER
+    d_ptr->translucentBackground = X11->use_xrender
+        && window->x11Info().depth() == 32;
+#endif
+#endif
+    d_ptr->image = 0;
+    d_ptr->inSetGeometry = false;
+    setStaticContentsSupport(true);
+}
+
+
+QRasterWindowSurface::~QRasterWindowSurface()
+{
+#ifdef Q_WS_X11
+    XFreeGC(X11->display, d_ptr->gc);
+#endif
+    if (d_ptr->image)
+        delete d_ptr->image;
+}
+
+
+QPaintDevice *QRasterWindowSurface::paintDevice()
+{
+    return &d_ptr->image->image;
+}
+
+void QRasterWindowSurface::beginPaint(const QRegion &rgn)
+{
+#if (defined(Q_WS_X11) && !defined(QT_NO_XRENDER)) || (defined(Q_WS_WIN) && !defined(Q_WS_WINCE))
+    if (!qt_widget_private(window())->isOpaque && window()->testAttribute(Qt::WA_TranslucentBackground)) {
+#if defined(Q_WS_WIN) && !defined(Q_WS_WINCE)
+        if (d_ptr->image->image.format() != QImage::Format_ARGB32_Premultiplied)
+            prepareBuffer(QImage::Format_ARGB32_Premultiplied, window());
+#endif
+        QPainter p(&d_ptr->image->image);
+        p.setCompositionMode(QPainter::CompositionMode_Source);
+        const QVector<QRect> rects = rgn.rects();
+        const QColor blank = Qt::transparent;
+        for (QVector<QRect>::const_iterator it = rects.begin(); it != rects.end(); ++it) {
+            p.fillRect(*it, blank);
+        }
+    }
+#else
+    Q_UNUSED(rgn);
+#endif
+}
+
+void QRasterWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &offset)
+{
+    Q_D(QRasterWindowSurface);
+
+    // Not ready for painting yet, bail out. This can happen in
+    // QWidget::create_sys()
+    if (!d->image || rgn.numRects() == 0)
+        return;
+
+#ifdef Q_WS_WIN
+    QRect br = rgn.boundingRect();
+
+#ifndef Q_WS_WINCE
+    if (!qt_widget_private(window())->isOpaque
+        && window()->testAttribute(Qt::WA_TranslucentBackground)
+        && (qt_widget_private(window())->data.window_flags & Qt::FramelessWindowHint))
+    {
+        QRect r = window()->frameGeometry();
+        QPoint frameOffset = qt_widget_private(window())->frameStrut().topLeft();
+        QRect dirtyRect = br.translated(offset + frameOffset);
+
+        SIZE size = {r.width(), r.height()};
+        POINT ptDst = {r.x(), r.y()};
+        POINT ptSrc = {0, 0};
+        BLENDFUNCTION blend = {AC_SRC_OVER, 0, (int)(255.0 * window()->windowOpacity()), Q_AC_SRC_ALPHA};
+        RECT dirty = {dirtyRect.x(), dirtyRect.y(),
+            dirtyRect.x() + dirtyRect.width(), dirtyRect.y() + dirtyRect.height()};
+        Q_UPDATELAYEREDWINDOWINFO info = {sizeof(info), NULL, &ptDst, &size, d->image->hdc, &ptSrc, 0, &blend, Q_ULW_ALPHA, &dirty};
+        ptrUpdateLayeredWindowIndirect(window()->internalWinId(), &info);
+    } else
+#endif
+    {
+        QPoint wOffset = qt_qwidget_data(widget)->wrect.topLeft();
+
+        HDC widget_dc = widget->getDC();
+
+        QRect wbr = br.translated(-wOffset);
+        BitBlt(widget_dc, wbr.x(), wbr.y(), wbr.width(), wbr.height(),
+               d->image->hdc, br.x() + offset.x(), br.y() + offset.y(), SRCCOPY);
+        widget->releaseDC(widget_dc);
+    }
+
+#ifndef QT_NO_DEBUG
+    static bool flush = !qgetenv("QT_FLUSH_WINDOWSURFACE").isEmpty();
+    if (flush) {
+        SelectObject(qt_win_display_dc(), GetStockObject(BLACK_BRUSH));
+        Rectangle(qt_win_display_dc(), 0, 0, d->image->width() + 2, d->image->height() + 2);
+        BitBlt(qt_win_display_dc(), 1, 1, d->image->width(), d->image->height(),
+               d->image->hdc, 0, 0, SRCCOPY);
+    }
+#endif
+
+#endif
+
+#ifdef Q_WS_X11
+    extern void *qt_getClipRects(const QRegion &r, int &num); // in qpaintengine_x11.cpp
+    extern QWidgetData* qt_widget_data(QWidget *);
+    QPoint wOffset = qt_qwidget_data(widget)->wrect.topLeft();
+
+    if (widget->window() != window()) {
+        XFreeGC(X11->display, d_ptr->gc);
+        d_ptr->gc = XCreateGC(X11->display, widget->handle(), 0, 0);
+    }
+
+    QRegion wrgn(rgn);
+    if (!wOffset.isNull())
+        wrgn.translate(-wOffset);
+    QRect wbr = wrgn.boundingRect();
+
+    if (wrgn.numRects() != 1) {
+        int num;
+        XRectangle *rects = (XRectangle *)qt_getClipRects(wrgn, num);
+        XSetClipRectangles(X11->display, d_ptr->gc, 0, 0, rects, num, YXBanded);
+    }
+
+    QRect br = rgn.boundingRect().translated(offset);
+#ifndef QT_NO_MITSHM
+    if (d_ptr->image->xshmpm) {
+        XCopyArea(X11->display, d_ptr->image->xshmpm, widget->handle(), d_ptr->gc,
+                  br.x(), br.y(), br.width(), br.height(), wbr.x(), wbr.y());
+        XSync(X11->display, False);
+    } else
+#endif
+    {
+        const QImage &src = d->image->image;
+        br = br.intersected(src.rect());
+        if (src.format() != QImage::Format_RGB32 || widget->x11Info().depth() < 24) {
+            Q_ASSERT(src.depth() >= 16);
+            const QImage sub_src(src.scanLine(br.y()) + br.x() * (uint(src.depth()) / 8),
+                                 br.width(), br.height(), src.bytesPerLine(), src.format());
+            QX11PixmapData *data = new QX11PixmapData(QPixmapData::PixmapType);
+            data->xinfo = widget->x11Info();
+            data->fromImage(sub_src, Qt::NoOpaqueDetection);
+            QPixmap pm = QPixmap(data);
+            XCopyArea(X11->display, pm.handle(), widget->handle(), d_ptr->gc, 0 , 0 , br.width(), br.height(), wbr.x(), wbr.y());
+        } else {
+            // qpaintengine_x11.cpp
+            extern void qt_x11_drawImage(const QRect &rect, const QPoint &pos, const QImage &image, Drawable hd, GC gc, Display *dpy, Visual *visual, int depth);
+            qt_x11_drawImage(br, wbr.topLeft(), src, widget->handle(), d_ptr->gc, X11->display, (Visual *)widget->x11Info().visual(), widget->x11Info().depth());
+        }
+    }
+
+    if (wrgn.numRects() != 1)
+        XSetClipMask(X11->display, d_ptr->gc, XNone);
+#endif // FALCON
+
+#ifdef Q_WS_MAC
+
+//     qDebug() << "Flushing" << widget << rgn << offset;
+
+//     d->image->image.save("flush.png");
+
+    Q_UNUSED(offset);
+    // Get a context for the widget.
+#ifndef QT_MAC_USE_COCOA
+    CGContextRef context;
+    CGrafPtr port = GetWindowPort(qt_mac_window_for(widget));
+    QDBeginCGContext(port, &context);
+#else
+    extern CGContextRef qt_mac_graphicsContextFor(QWidget *);
+    CGContextRef context = qt_mac_graphicsContextFor(widget);
+#endif
+    CGContextSaveGState(context);
+
+    // Flip context.
+    CGContextTranslateCTM(context, 0, widget->height());
+    CGContextScaleCTM(context, 1, -1);
+
+    // Clip to region.
+    const QVector<QRect> &rects = rgn.rects();
+    for (int i = 0; i < rects.size(); ++i) {
+        const QRect &rect = rects.at(i);
+        CGContextAddRect(context, CGRectMake(rect.x(), rect.y(), rect.width(), rect.height()));
+    }
+    CGContextClip(context);
+
+    QRect r = rgn.boundingRect();
+    const CGRect area = CGRectMake(r.x(), r.y(), r.width(), r.height());
+    CGImageRef image = CGBitmapContextCreateImage(d->image->cg);
+    CGImageRef subImage = CGImageCreateWithImageInRect(image, area);
+
+    qt_mac_drawCGImage(context, &area, subImage);
+    CGImageRelease(subImage);
+    CGImageRelease(image);
+
+//     CGSize size = { d->image->image.width(), d->image->image.height() };
+//     CGLayerRef layer = CGLayerCreateWithContext(d->image->cg, size, 0);
+//     CGPoint pt = { 0, 0 };
+//     CGContextDrawLayerAtPoint(context, pt, layer);
+//     CGLayerRelease(layer);
+
+    // Restore context.
+    CGContextRestoreGState(context);
+#ifndef QT_MAC_USE_COCOA
+    QDEndCGContext(port, &context);
+#else
+    CGContextFlush(context);
+#endif
+#endif
+
+#ifdef Q_OS_SYMBIAN
+    Q_UNUSED(widget);
+    Q_UNUSED(rgn);
+    Q_UNUSED(offset);
+#endif
+}
+
+void QRasterWindowSurface::setGeometry(const QRect &rect)
+{
+    QWindowSurface::setGeometry(rect);
+    Q_D(QRasterWindowSurface);
+    d->inSetGeometry = true;
+    if (d->image == 0 || d->image->width() < rect.width() || d->image->height() < rect.height()) {
+#if (defined(Q_WS_X11) && !defined(QT_NO_XRENDER)) || (defined(Q_WS_WIN) && !defined(Q_WS_WINCE))
+#ifndef Q_WS_WIN
+        if (d_ptr->translucentBackground)
+#else
+        if (!qt_widget_private(window())->isOpaque)
+#endif
+            prepareBuffer(QImage::Format_ARGB32_Premultiplied, window());
+        else
+#endif
+            prepareBuffer(QNativeImage::systemFormat(), window());
+    }
+    d->inSetGeometry = false;
+}
+
+// from qwindowsurface.cpp
+extern void qt_scrollRectInImage(QImage &img, const QRect &rect, const QPoint &offset);
+
+bool QRasterWindowSurface::scroll(const QRegion &area, int dx, int dy)
+{
+#ifdef Q_WS_WIN
+    Q_D(QRasterWindowSurface);
+
+    if (!d->image || !d->image->hdc)
+        return false;
+
+    QRect rect = area.boundingRect();
+    BitBlt(d->image->hdc, rect.x()+dx, rect.y()+dy, rect.width(), rect.height(),
+           d->image->hdc, rect.x(), rect.y(), SRCCOPY);
+
+    return true;
+#else
+    Q_D(QRasterWindowSurface);
+
+    if (!d->image || d->image->image.isNull())
+        return false;
+
+    const QVector<QRect> rects = area.rects();
+    for (int i = 0; i < rects.size(); ++i)
+        qt_scrollRectInImage(d->image->image, rects.at(i), QPoint(dx, dy));
+
+    return true;
+#endif
+}
+
+
+void QRasterWindowSurface::prepareBuffer(QImage::Format format, QWidget *widget)
+{
+    Q_D(QRasterWindowSurface);
+
+    int width = window()->width();
+    int height = window()->height();
+    if (d->image) {
+        width = qMax(d->image->width(), width);
+        height = qMax(d->image->height(), height);
+    }
+
+    if (width == 0 || height == 0) {
+        delete d->image;
+        d->image = 0;
+        return;
+    }
+
+    QNativeImage *oldImage = d->image;
+
+    d->image = new QNativeImage(width, height, format, false, widget);
+
+    if (oldImage && d->inSetGeometry && hasStaticContents()) {
+        // Make sure we use the const version of bits() (no detach).
+        const uchar *src = const_cast<const QImage &>(oldImage->image).bits();
+        uchar *dst = d->image->image.bits();
+
+        const int srcBytesPerLine = oldImage->image.bytesPerLine();
+        const int dstBytesPerLine = d->image->image.bytesPerLine();
+        const int bytesPerPixel = oldImage->image.depth() >> 3;
+
+        QRegion staticRegion(staticContents());
+        // Make sure we're inside the boundaries of the old image.
+        staticRegion &= QRect(0, 0, oldImage->image.width(), oldImage->image.height());
+        const QVector<QRect> &rects = staticRegion.rects();
+        const QRect *srcRect = rects.constData();
+
+        // Copy the static content of the old image into the new one.
+        int numRectsLeft = rects.size();
+        do {
+            const int bytesOffset = srcRect->x() * bytesPerPixel;
+            const int dy = srcRect->y();
+
+            // Adjust src and dst to point to the right offset.
+            const uchar *s = src + dy * srcBytesPerLine + bytesOffset;
+            uchar *d = dst + dy * dstBytesPerLine + bytesOffset;
+            const int numBytes = srcRect->width() * bytesPerPixel;
+
+            int numScanLinesLeft = srcRect->height();
+            do {
+                ::memcpy(d, s, numBytes);
+                d += dstBytesPerLine;
+                s += srcBytesPerLine;
+            } while (--numScanLinesLeft);
+
+            ++srcRect;
+        } while (--numRectsLeft);
+    }
+
+    delete oldImage;
+}
+
+QT_END_NAMESPACE