summaryrefslogtreecommitdiffstats
path: root/src/gui/painting/qwindowsurface_raster.cpp
blob: 7a74fe0dad9afbbf8b810114d016c4a5bb1295b9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include <qdebug.h>

#include <qglobal.h> // for Q_WS_WIN define (non-PCH)
#ifdef Q_WS_WIN
#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

#ifdef Q_WS_WIN
PtrUpdateLayeredWindowIndirect ptrUpdateLayeredWindowIndirect;
#endif

class QRasterWindowSurfacePrivate
{
public:
    QNativeImage *image;

#ifdef Q_WS_X11
    GC gc;
#ifndef QT_NO_XRENDER
    uint translucentBackground : 1;
#endif
#endif
#if defined(Q_WS_WIN) && !defined(Q_OS_WINCE)
    uint canUseLayeredWindow : 1;
#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
#if defined(Q_WS_WIN) && !defined(Q_OS_WINCE)
    d_ptr->canUseLayeredWindow = ptrUpdateLayeredWindowIndirect
        && (qt_widget_private(window)->data.window_flags & Qt::FramelessWindowHint);
#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;

    delete d_ptr;
}


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_OS_WINCE))
    if (!qt_widget_private(window())->isOpaque) {
#if defined(Q_WS_WIN) && !defined(Q_OS_WINCE)
        if (d_ptr->image->image.format() != QImage::Format_ARGB32_Premultiplied
            && d_ptr->canUseLayeredWindow)
            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);
        }
    }
#endif
#if defined(Q_OS_WINCE)
    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)
        return;

#ifdef Q_WS_WIN
    QRect br = rgn.boundingRect();

#ifndef Q_OS_WINCE
    if (!qt_widget_private(window())->isOpaque && d->canUseLayeredWindow) {
        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};
        Q_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();

    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) {
            QX11PixmapData *data = new QX11PixmapData(QPixmapData::PixmapType);
            data->xinfo = widget->x11Info();
            data->fromImage(src, Qt::AutoColor);
            QPixmap pm = QPixmap(data);
            XCopyArea(X11->display, pm.handle(), widget->handle(), d_ptr->gc, br.x() , br.y() , 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());
        }
    }
#endif // FALCON

#ifdef Q_WS_MAC

//     qDebug() << "Flushing" << widget << rgn << offset;

//     d->image->image.save("flush.png");

    // 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
}

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_OS_WINCE))
#ifndef Q_WS_WIN
        if (d_ptr->translucentBackground)
#else
        if (!qt_widget_private(window())->isOpaque && d->canUseLayeredWindow)
#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