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Diffstat (limited to 'src/gui/image/qpicture.cpp')
| -rw-r--r-- | src/gui/image/qpicture.cpp | 1999 |
1 files changed, 1999 insertions, 0 deletions
diff --git a/src/gui/image/qpicture.cpp b/src/gui/image/qpicture.cpp new file mode 100644 index 0000000000..3f38c0ce2a --- /dev/null +++ b/src/gui/image/qpicture.cpp @@ -0,0 +1,1999 @@ +/**************************************************************************** +** +** 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 "qpicture.h" +#include <private/qpicture_p.h> + +#ifndef QT_NO_PICTURE + +#include <private/qfactoryloader_p.h> +#include <private/qpaintengine_pic_p.h> +#include <private/qfont_p.h> + +#include "qdatastream.h" +#include "qfile.h" +#include "qimage.h" +#include "qmutex.h" +#include "qpainter.h" +#include "qpainterpath.h" +#include "qpixmap.h" +#include "qregion.h" +#include "qdebug.h" + +QT_BEGIN_NAMESPACE + +void qt_format_text(const QFont &fnt, const QRectF &_r, + int tf, const QTextOption *opt, const QString& str, QRectF *brect, + int tabstops, int *, int tabarraylen, + QPainter *painter); + +/*! + \class QPicture + \brief The QPicture class is a paint device that records and + replays QPainter commands. + + \ingroup painting + \ingroup shared + + + A picture serializes painter commands to an IO device in a + platform-independent format. They are sometimes referred to as meta-files. + + Qt pictures use a proprietary binary format. Unlike native picture + (meta-file) formats on many window systems, Qt pictures have no + limitations regarding their contents. Everything that can be + painted on a widget or pixmap (e.g., fonts, pixmaps, regions, + transformed graphics, etc.) can also be stored in a picture. + + QPicture is resolution independent, i.e. a QPicture can be + displayed on different devices (for example svg, pdf, ps, printer + and screen) looking the same. This is, for instance, needed for + WYSIWYG print preview. QPicture runs in the default system dpi, + and scales the painter to match differences in resolution + depending on the window system. + + Example of how to record a picture: + \snippet doc/src/snippets/picture/picture.cpp 0 + + Note that the list of painter commands is reset on each call to + the QPainter::begin() function. + + Example of how to replay a picture: + \snippet doc/src/snippets/picture/picture.cpp 1 + + Pictures can also be drawn using play(). Some basic data about a + picture is available, for example, size(), isNull() and + boundingRect(). + + \sa QMovie +*/ + +const char *qt_mfhdr_tag = "QPIC"; // header tag +static const quint16 mfhdr_maj = 11; // major version # +static const quint16 mfhdr_min = 0; // minor version # + +/*! + Constructs an empty picture. + + The \a formatVersion parameter may be used to \e create a QPicture + that can be read by applications that are compiled with earlier + versions of Qt. + + Note that the default formatVersion is -1 which signifies the + current release, i.e. for Qt 4.0 a formatVersion of 7 is the same + as the default formatVersion of -1. + + Reading pictures generated by earlier versions of Qt is not + supported in Qt 4.0. +*/ + +QPicture::QPicture(int formatVersion) + : QPaintDevice(), + d_ptr(new QPicturePrivate) +{ + Q_D(QPicture); + + if (formatVersion == 0) + qWarning("QPicture: invalid format version 0"); + + // still accept the 0 default from before Qt 3.0. + if (formatVersion > 0 && formatVersion != (int)mfhdr_maj) { + d->formatMajor = formatVersion; + d->formatMinor = 0; + d->formatOk = false; + } else { + d->resetFormat(); + } +} + +/*! + Constructs a copy of \a pic. + + This constructor is fast thanks to \l{implicit sharing}. +*/ + +QPicture::QPicture(const QPicture &pic) + : QPaintDevice(), d_ptr(pic.d_ptr) +{ +} + +/*! \internal */ +QPicture::QPicture(QPicturePrivate &dptr) + : QPaintDevice(), + d_ptr(&dptr) +{ +} + +/*! + Destroys the picture. +*/ +QPicture::~QPicture() +{ +} + +/*! + \internal +*/ +int QPicture::devType() const +{ + return QInternal::Picture; +} + +/*! + \fn bool QPicture::isNull() const + + Returns true if the picture contains no data; otherwise returns + false. +*/ + +/*! + \fn uint QPicture::size() const + + Returns the size of the picture data. + + \sa data() +*/ + +/*! + \fn const char* QPicture::data() const + + Returns a pointer to the picture data. The pointer is only valid + until the next non-const function is called on this picture. The + returned pointer is 0 if the picture contains no data. + + \sa size(), isNull() +*/ + + +bool QPicture::isNull() const +{ + return d_func()->pictb.buffer().isNull(); +} + +uint QPicture::size() const +{ + return d_func()->pictb.buffer().size(); +} + +const char* QPicture::data() const +{ + return d_func()->pictb.buffer(); +} + +void QPicture::detach() +{ + d_ptr.detach(); +} + +bool QPicture::isDetached() const +{ + return d_func()->ref == 1; +} + +/*! + Sets the picture data directly from \a data and \a size. This + function copies the input data. + + \sa data(), size() +*/ + +void QPicture::setData(const char* data, uint size) +{ + detach(); + d_func()->pictb.setData(data, size); + d_func()->resetFormat(); // we'll have to check +} + + +/*! + Loads a picture from the file specified by \a fileName and returns + true if successful; otherwise returns false. + + Please note that the \a format parameter has been deprecated and + will have no effect. + + \sa save() +*/ + +bool QPicture::load(const QString &fileName, const char *format) +{ + QFile f(fileName); + if (!f.open(QIODevice::ReadOnly)) + return false; + return load(&f, format); +} + +/*! + \overload + + \a dev is the device to use for loading. +*/ + +bool QPicture::load(QIODevice *dev, const char *format) +{ + if(format) { +#ifndef QT_NO_PICTUREIO + QPictureIO io(dev, format); + bool result = io.read(); + if (result) { + operator=(io.picture()); + + } else if (format) +#else + bool result = false; +#endif + { + qWarning("QPicture::load: No such picture format: %s", format); + } + return result; + } + + detach(); + QByteArray a = dev->readAll(); + + d_func()->pictb.setData(a); // set byte array in buffer + return d_func()->checkFormat(); +} + +/*! + Saves a picture to the file specified by \a fileName and returns + true if successful; otherwise returns false. + + Please note that the \a format parameter has been deprecated and + will have no effect. + + \sa load() +*/ + +bool QPicture::save(const QString &fileName, const char *format) +{ + if (paintingActive()) { + qWarning("QPicture::save: still being painted on. " + "Call QPainter::end() first"); + return false; + } + + + if(format) { +#ifndef QT_NO_PICTUREIO + QPictureIO io(fileName, format); + bool result = io.write(); + if (result) { + operator=(io.picture()); + } else if (format) +#else + bool result = false; +#endif + { + qWarning("QPicture::save: No such picture format: %s", format); + } + return result; + } + + QFile f(fileName); + if (!f.open(QIODevice::WriteOnly)) + return false; + return save(&f, format); +} + +/*! + \overload + + \a dev is the device to use for saving. +*/ + +bool QPicture::save(QIODevice *dev, const char *format) +{ + if (paintingActive()) { + qWarning("QPicture::save: still being painted on. " + "Call QPainter::end() first"); + return false; + } + + if(format) { +#ifndef QT_NO_PICTUREIO + QPictureIO io(dev, format); + bool result = io.write(); + if (result) { + operator=(io.picture()); + } else if (format) +#else + bool result = false; +#endif + { + qWarning("QPicture::save: No such picture format: %s", format); + } + return result; + } + + dev->write(d_func()->pictb.buffer(), d_func()->pictb.buffer().size()); + return true; +} + +/*! + Returns the picture's bounding rectangle or an invalid rectangle + if the picture contains no data. +*/ + +QRect QPicture::boundingRect() const +{ + Q_D(const QPicture); + // Use override rect where possible. + if (!d->override_rect.isEmpty()) + return d->override_rect; + + if (!d->formatOk) + d_ptr->checkFormat(); + + return d->brect; +} + +/*! + Sets the picture's bounding rectangle to \a r. The automatically + calculated value is overridden. +*/ + +void QPicture::setBoundingRect(const QRect &r) +{ + d_func()->override_rect = r; +} + +/*! + Replays the picture using \a painter, and returns true if + successful; otherwise returns false. + + This function does exactly the same as QPainter::drawPicture() + with (x, y) = (0, 0). +*/ + +bool QPicture::play(QPainter *painter) +{ + Q_D(QPicture); + + if (d->pictb.size() == 0) // nothing recorded + return true; + + if (!d->formatOk && !d->checkFormat()) + return false; + + d->pictb.open(QIODevice::ReadOnly); // open buffer device + QDataStream s; + s.setDevice(&d->pictb); // attach data stream to buffer + s.device()->seek(10); // go directly to the data + s.setVersion(d->formatMajor == 4 ? 3 : d->formatMajor); + + quint8 c, clen; + quint32 nrecords; + s >> c >> clen; + Q_ASSERT(c == QPicturePrivate::PdcBegin); + // bounding rect was introduced in ver 4. Read in checkFormat(). + if (d->formatMajor >= 4) { + qint32 dummy; + s >> dummy >> dummy >> dummy >> dummy; + } + s >> nrecords; + if (!exec(painter, s, nrecords)) { + qWarning("QPicture::play: Format error"); + d->pictb.close(); + return false; + } + d->pictb.close(); + return true; // no end-command +} + + +// +// QFakeDevice is used to create fonts with a custom DPI +// +class QFakeDevice : public QPaintDevice +{ +public: + QFakeDevice() { dpi_x = qt_defaultDpiX(); dpi_y = qt_defaultDpiY(); } + void setDpiX(int dpi) { dpi_x = dpi; } + void setDpiY(int dpi) { dpi_y = dpi; } + QPaintEngine *paintEngine() const { return 0; } + int metric(PaintDeviceMetric m) const + { + switch(m) { + case PdmPhysicalDpiX: + case PdmDpiX: + return dpi_x; + case PdmPhysicalDpiY: + case PdmDpiY: + return dpi_y; + default: + return QPaintDevice::metric(m); + } + } + +private: + int dpi_x; + int dpi_y; +}; + +/*! + \internal + Iterates over the internal picture data and draws the picture using + \a painter. +*/ + +bool QPicture::exec(QPainter *painter, QDataStream &s, int nrecords) +{ + Q_D(QPicture); +#if defined(QT_DEBUG) + int strm_pos; +#endif + quint8 c; // command id + quint8 tiny_len; // 8-bit length descriptor + qint32 len; // 32-bit length descriptor + qint16 i_16, i1_16, i2_16; // parameters... + qint8 i_8; + quint32 ul; + double dbl; + bool bl; + QByteArray str1; + QString str; + QPointF p, p1, p2; + QPoint ip, ip1, ip2; + QRect ir; + QRectF r; + QPolygonF a; + QPolygon ia; + QColor color; + QFont font; + QPen pen; + QBrush brush; + QRegion rgn; + QMatrix wmatrix; + QTransform matrix; + + QTransform worldMatrix = painter->transform(); + worldMatrix.scale(qreal(painter->device()->logicalDpiX()) / qreal(qt_defaultDpiX()), + qreal(painter->device()->logicalDpiY()) / qreal(qt_defaultDpiY())); + painter->setTransform(worldMatrix); + + while (nrecords-- && !s.atEnd()) { + s >> c; // read cmd + s >> tiny_len; // read param length + if (tiny_len == 255) // longer than 254 bytes + s >> len; + else + len = tiny_len; +#if defined(QT_DEBUG) + strm_pos = s.device()->pos(); +#endif + switch (c) { // exec cmd + case QPicturePrivate::PdcNOP: + break; + case QPicturePrivate::PdcDrawPoint: + if (d->formatMajor <= 5) { + s >> ip; + painter->drawPoint(ip); + } else { + s >> p; + painter->drawPoint(p); + } + break; + case QPicturePrivate::PdcDrawPoints: +// ## implement me in the picture paint engine +// s >> a >> i1_32 >> i2_32; +// painter->drawPoints(a.mid(i1_32, i2_32)); + break; + case QPicturePrivate::PdcDrawPath: { + QPainterPath path; + s >> path; + painter->drawPath(path); + break; + } + case QPicturePrivate::PdcDrawLine: + if (d->formatMajor <= 5) { + s >> ip1 >> ip2; + painter->drawLine(ip1, ip2); + } else { + s >> p1 >> p2; + painter->drawLine(p1, p2); + } + break; + case QPicturePrivate::PdcDrawRect: + if (d->formatMajor <= 5) { + s >> ir; + painter->drawRect(ir); + } else { + s >> r; + painter->drawRect(r); + } + break; + case QPicturePrivate::PdcDrawRoundRect: + if (d->formatMajor <= 5) { + s >> ir >> i1_16 >> i2_16; + painter->drawRoundedRect(ir, i1_16, i2_16, Qt::RelativeSize); + } else { + s >> r >> i1_16 >> i2_16; + painter->drawRoundedRect(r, i1_16, i2_16, Qt::RelativeSize); + } + break; + case QPicturePrivate::PdcDrawEllipse: + if (d->formatMajor <= 5) { + s >> ir; + painter->drawEllipse(ir); + } else { + s >> r; + painter->drawEllipse(r); + } + break; + case QPicturePrivate::PdcDrawArc: + if (d->formatMajor <= 5) { + s >> ir; + r = ir; + } else { + s >> r; + } + s >> i1_16 >> i2_16; + painter->drawArc(r, i1_16, i2_16); + break; + case QPicturePrivate::PdcDrawPie: + if (d->formatMajor <= 5) { + s >> ir; + r = ir; + } else { + s >> r; + } + s >> i1_16 >> i2_16; + painter->drawPie(r, i1_16, i2_16); + break; + case QPicturePrivate::PdcDrawChord: + if (d->formatMajor <= 5) { + s >> ir; + r = ir; + } else { + s >> r; + } + s >> i1_16 >> i2_16; + painter->drawChord(r, i1_16, i2_16); + break; + case QPicturePrivate::PdcDrawLineSegments: + s >> ia; + painter->drawLines(ia); + ia.clear(); + break; + case QPicturePrivate::PdcDrawPolyline: + if (d->formatMajor <= 5) { + s >> ia; + painter->drawPolyline(ia); + ia.clear(); + } else { + s >> a; + painter->drawPolyline(a); + a.clear(); + } + break; + case QPicturePrivate::PdcDrawPolygon: + if (d->formatMajor <= 5) { + s >> ia >> i_8; + painter->drawPolygon(ia, i_8 ? Qt::WindingFill : Qt::OddEvenFill); + a.clear(); + } else { + s >> a >> i_8; + painter->drawPolygon(a, i_8 ? Qt::WindingFill : Qt::OddEvenFill); + a.clear(); + } + break; + case QPicturePrivate::PdcDrawCubicBezier: { + s >> ia; + QPainterPath path; + Q_ASSERT(ia.size() == 4); + path.moveTo(ia.at(0)); + path.cubicTo(ia.at(1), ia.at(2), ia.at(3)); + painter->strokePath(path, painter->pen()); + a.clear(); + } + break; + case QPicturePrivate::PdcDrawText: + s >> ip >> str1; + painter->drawText(ip, QString::fromLatin1(str1)); + break; + case QPicturePrivate::PdcDrawTextFormatted: + s >> ir >> i_16 >> str1; + painter->drawText(ir, i_16, QString::fromLatin1(str1)); + break; + case QPicturePrivate::PdcDrawText2: + if (d->formatMajor <= 5) { + s >> ip >> str; + painter->drawText(ip, str); + } else { + s >> p >> str; + painter->drawText(p, str); + } + break; + case QPicturePrivate::PdcDrawText2Formatted: + s >> ir; + s >> i_16; + s >> str; + painter->drawText(ir, i_16, str); + break; + case QPicturePrivate::PdcDrawTextItem: { + s >> p >> str >> font >> ul; + + // the text layout direction is not used here because it's already + // aligned when QPicturePaintEngine::drawTextItem() serializes the + // drawText() call, therefore ul is unsed in this context + + if (d->formatMajor >= 9) { + s >> dbl; + QFont fnt(font); + if (dbl != 1.0) { + QFakeDevice fake; + fake.setDpiX(qRound(dbl*qt_defaultDpiX())); + fake.setDpiY(qRound(dbl*qt_defaultDpiY())); + fnt = QFont(font, &fake); + } + + qreal justificationWidth; + s >> justificationWidth; + + int flags = Qt::TextSingleLine | Qt::TextDontClip | Qt::TextForceLeftToRight; + + QSizeF size(1, 1); + if (justificationWidth > 0) { + size.setWidth(justificationWidth); + flags |= Qt::TextJustificationForced; + flags |= Qt::AlignJustify; + } + + QFontMetrics fm(fnt); + QPointF pt(p.x(), p.y() - fm.ascent()); + qt_format_text(fnt, QRectF(pt, size), flags, /*opt*/0, + str, /*brect=*/0, /*tabstops=*/0, /*...*/0, /*tabarraylen=*/0, painter); + } else { + qt_format_text(font, QRectF(p, QSizeF(1, 1)), Qt::TextSingleLine | Qt::TextDontClip, /*opt*/0, + str, /*brect=*/0, /*tabstops=*/0, /*...*/0, /*tabarraylen=*/0, painter); + } + + break; + } + case QPicturePrivate::PdcDrawPixmap: { + QPixmap pixmap; + if (d->formatMajor < 4) { + s >> ip >> pixmap; + painter->drawPixmap(ip, pixmap); + } else if (d->formatMajor <= 5) { + s >> ir >> pixmap; + painter->drawPixmap(ir, pixmap); + } else { + QRectF sr; + if (d->in_memory_only) { + int index; + s >> r >> index >> sr; + Q_ASSERT(index < d->pixmap_list.size()); + pixmap = d->pixmap_list.at(index); + } else { + s >> r >> pixmap >> sr; + } + painter->drawPixmap(r, pixmap, sr); + } + } + break; + case QPicturePrivate::PdcDrawTiledPixmap: { + QPixmap pixmap; + if (d->in_memory_only) { + int index; + s >> r >> index >> p; + Q_ASSERT(index < d->pixmap_list.size()); + pixmap = d->pixmap_list.at(index); + } else { + s >> r >> pixmap >> p; + } + painter->drawTiledPixmap(r, pixmap, p); + } + break; + case QPicturePrivate::PdcDrawImage: { + QImage image; + if (d->formatMajor < 4) { + s >> p >> image; + painter->drawImage(p, image); + } else if (d->formatMajor <= 5){ + s >> ir >> image; + painter->drawImage(ir, image, QRect(0, 0, ir.width(), ir.height())); + } else { + QRectF sr; + if (d->in_memory_only) { + int index; + s >> r >> index >> sr >> ul; + Q_ASSERT(index < d->image_list.size()); + image = d->image_list.at(index); + } else { + s >> r >> image >> sr >> ul; + } + painter->drawImage(r, image, sr, Qt::ImageConversionFlags(ul)); + } + } + break; + case QPicturePrivate::PdcBegin: + s >> ul; // number of records + if (!exec(painter, s, ul)) + return false; + break; + case QPicturePrivate::PdcEnd: + if (nrecords == 0) + return true; + break; + case QPicturePrivate::PdcSave: + painter->save(); + break; + case QPicturePrivate::PdcRestore: + painter->restore(); + break; + case QPicturePrivate::PdcSetBkColor: + s >> color; + painter->setBackground(color); + break; + case QPicturePrivate::PdcSetBkMode: + s >> i_8; + painter->setBackgroundMode((Qt::BGMode)i_8); + break; + case QPicturePrivate::PdcSetROP: // NOP + s >> i_8; + break; + case QPicturePrivate::PdcSetBrushOrigin: + if (d->formatMajor <= 5) { + s >> ip; + painter->setBrushOrigin(ip); + } else { + s >> p; + painter->setBrushOrigin(p); + } + break; + case QPicturePrivate::PdcSetFont: + s >> font; + painter->setFont(font); + break; + case QPicturePrivate::PdcSetPen: + if (d->in_memory_only) { + int index; + s >> index; + Q_ASSERT(index < d->pen_list.size()); + pen = d->pen_list.at(index); + } else { + s >> pen; + } + painter->setPen(pen); + break; + case QPicturePrivate::PdcSetBrush: + if (d->in_memory_only) { + int index; + s >> index; + Q_ASSERT(index < d->brush_list.size()); + brush = d->brush_list.at(index); + } else { + s >> brush; + } + painter->setBrush(brush); + break; +// #ifdef Q_Q3PAINTER +// case QPicturePrivate::PdcSetTabStops: +// s >> i_16; +// painter->setTabStops(i_16); +// break; +// case QPicturePrivate::PdcSetTabArray: +// s >> i_16; +// if (i_16 == 0) { +// painter->setTabArray(0); +// } else { +// int *ta = new int[i_16]; +// for (int i=0; i<i_16; i++) { +// s >> i1_16; +// ta[i] = i1_16; +// } +// painter->setTabArray(ta); +// delete [] ta; +// } +// break; +// #endif + case QPicturePrivate::PdcSetVXform: + s >> i_8; + painter->setViewTransformEnabled(i_8); + break; + case QPicturePrivate::PdcSetWindow: + if (d->formatMajor <= 5) { + s >> ir; + painter->setWindow(ir); + } else { + s >> r; + painter->setWindow(r.toRect()); + } + break; + case QPicturePrivate::PdcSetViewport: + if (d->formatMajor <= 5) { + s >> ir; + painter->setViewport(ir); + } else { + s >> r; + painter->setViewport(r.toRect()); + } + break; + case QPicturePrivate::PdcSetWXform: + s >> i_8; + painter->setMatrixEnabled(i_8); + break; + case QPicturePrivate::PdcSetWMatrix: + if (d->formatMajor >= 8) { + s >> matrix >> i_8; + } else { + s >> wmatrix >> i_8; + matrix = QTransform(wmatrix); + } + // i_8 is always false due to updateXForm() in qpaintengine_pic.cpp + painter->setTransform(matrix * worldMatrix, i_8); + break; +// #ifdef Q_Q3PAINTER +// case QPicturePrivate::PdcSaveWMatrix: +// painter->saveWorldMatrix(); +// break; +// case QPicturePrivate::PdcRestoreWMatrix: +// painter->restoreWorldMatrix(); +// break; +// #endif + case QPicturePrivate::PdcSetClip: + s >> i_8; + painter->setClipping(i_8); + break; + case QPicturePrivate::PdcSetClipRegion: + s >> rgn >> i_8; + if (d->formatMajor >= 9) { + painter->setClipRegion(rgn, Qt::ClipOperation(i_8)); + } else { + painter->setClipRegion(rgn); + } + break; + case QPicturePrivate::PdcSetClipPath: + { + QPainterPath path; + s >> path >> i_8; + painter->setClipPath(path, Qt::ClipOperation(i_8)); + break; + } + case QPicturePrivate::PdcSetRenderHint: + s >> ul; + painter->setRenderHint(QPainter::Antialiasing, + bool(ul & QPainter::Antialiasing)); + painter->setRenderHint(QPainter::SmoothPixmapTransform, + bool(ul & QPainter::SmoothPixmapTransform)); + break; + case QPicturePrivate::PdcSetCompositionMode: + s >> ul; + painter->setCompositionMode((QPainter::CompositionMode)ul); + break; + case QPicturePrivate::PdcSetClipEnabled: + s >> bl; + painter->setClipping(bl); + break; + case QPicturePrivate::PdcSetOpacity: + s >> dbl; + painter->setOpacity(qreal(dbl)); + break; + default: + qWarning("QPicture::play: Invalid command %d", c); + if (len) // skip unknown command + s.device()->seek(s.device()->pos()+len); + } +#if defined(QT_DEBUG) + //qDebug("device->at(): %i, strm_pos: %i len: %i", (int)s.device()->pos(), strm_pos, len); + Q_ASSERT(qint32(s.device()->pos() - strm_pos) == len); +#endif + } + return false; +} + +/*! + \internal + + Internal implementation of the virtual QPaintDevice::metric() + function. + + A picture has the following hard-coded values: numcolors=16777216 + and depth=24. + + \a m is the metric to get. +*/ + +int QPicture::metric(PaintDeviceMetric m) const +{ + int val; + QRect brect = boundingRect(); + switch (m) { + case PdmWidth: + val = brect.width(); + break; + case PdmHeight: + val = brect.height(); + break; + case PdmWidthMM: + val = int(25.4/qt_defaultDpiX()*brect.width()); + break; + case PdmHeightMM: + val = int(25.4/qt_defaultDpiY()*brect.height()); + break; + case PdmDpiX: + case PdmPhysicalDpiX: + val = qt_defaultDpiX(); + break; + case PdmDpiY: + case PdmPhysicalDpiY: + val = qt_defaultDpiY(); + break; + case PdmNumColors: + val = 16777216; + break; + case PdmDepth: + val = 24; + break; + default: + val = 0; + qWarning("QPicture::metric: Invalid metric command"); + } + return val; +} + +/*! + \fn void QPicture::detach() + \internal + Detaches from shared picture data and makes sure that this picture + is the only one referring to the data. + + If multiple pictures share common data, this picture makes a copy + of the data and detaches itself from the sharing mechanism. + Nothing is done if there is just a single reference. +*/ + +/*! \fn bool QPicture::isDetached() const +\internal +*/ + +/*! \internal +### Qt 5 - remove me + */ +void QPicture::detach_helper() +{ + // QExplicitelySharedDataPointer takes care of cloning using + // QPicturePrivate's copy constructor. Do not call detach_helper() anymore + // and remove in Qt 5, please. + Q_ASSERT_X(false, "QPicture::detach_helper()", "Do not call this function"); +} + +/*! + Assigns picture \a p to this picture and returns a reference to + this picture. +*/ +QPicture& QPicture::operator=(const QPicture &p) +{ + d_ptr = p.d_ptr; + return *this; +} + +/*! + \fn void QPicture::swap(QPicture &other) + \since 4.8 + + Swaps picture \a other with this picture. This operation is very + fast and never fails. +*/ + +/*! + \internal + + Constructs a QPicturePrivate +*/ +QPicturePrivate::QPicturePrivate() + : in_memory_only(false) +{ +} + +/*! + \internal + + Copy-Constructs a QPicturePrivate. Needed when detaching. +*/ +QPicturePrivate::QPicturePrivate(const QPicturePrivate &other) + : trecs(other.trecs), + formatOk(other.formatOk), + formatMinor(other.formatMinor), + brect(other.brect), + override_rect(other.override_rect), + in_memory_only(false) +{ + pictb.setData(other.pictb.data(), other.pictb.size()); + if (other.pictb.isOpen()) { + pictb.open(other.pictb.openMode()); + pictb.seek(other.pictb.pos()); + } +} + +/*! + \internal + + Sets formatOk to false and resets the format version numbers to default +*/ + +void QPicturePrivate::resetFormat() +{ + formatOk = false; + formatMajor = mfhdr_maj; + formatMinor = mfhdr_min; +} + + +/*! + \internal + + Checks data integrity and format version number. Set formatOk to + true on success, to false otherwise. Returns the resulting formatOk + value. +*/ +bool QPicturePrivate::checkFormat() +{ + resetFormat(); + + // can't check anything in an empty buffer + if (pictb.size() == 0 || pictb.isOpen()) + return false; + + pictb.open(QIODevice::ReadOnly); // open buffer device + QDataStream s; + s.setDevice(&pictb); // attach data stream to buffer + + char mf_id[4]; // picture header tag + s.readRawData(mf_id, 4); // read actual tag + if (memcmp(mf_id, qt_mfhdr_tag, 4) != 0) { // wrong header id + qWarning("QPicturePaintEngine::checkFormat: Incorrect header"); + pictb.close(); + return false; + } + + int cs_start = sizeof(quint32); // pos of checksum word + int data_start = cs_start + sizeof(quint16); + quint16 cs,ccs; + QByteArray buf = pictb.buffer(); // pointer to data + + s >> cs; // read checksum + ccs = (quint16) qChecksum(buf.constData() + data_start, buf.size() - data_start); + if (ccs != cs) { + qWarning("QPicturePaintEngine::checkFormat: Invalid checksum %x, %x expected", + ccs, cs); + pictb.close(); + return false; + } + + quint16 major, minor; + s >> major >> minor; // read version number + if (major > mfhdr_maj) { // new, incompatible version + qWarning("QPicturePaintEngine::checkFormat: Incompatible version %d.%d", + major, minor); + pictb.close(); + return false; + } + s.setVersion(major != 4 ? major : 3); + + quint8 c, clen; + s >> c >> clen; + if (c == QPicturePrivate::PdcBegin) { + if (!(major >= 1 && major <= 3)) { + qint32 l, t, w, h; + s >> l >> t >> w >> h; + brect = QRect(l, t, w, h); + } + } else { + qWarning("QPicturePaintEngine::checkFormat: Format error"); + pictb.close(); + return false; + } + pictb.close(); + + formatOk = true; // picture seems to be ok + formatMajor = major; + formatMinor = minor; + return true; +} + +/*! \internal */ +QPaintEngine *QPicture::paintEngine() const +{ + if (!d_func()->paintEngine) + const_cast<QPicture*>(this)->d_func()->paintEngine.reset(new QPicturePaintEngine); + return d_func()->paintEngine.data(); +} + +/***************************************************************************** + QPicture stream functions + *****************************************************************************/ + +#ifndef QT_NO_DATASTREAM +/*! + \relates QPicture + + Writes picture \a r to the stream \a s and returns a reference to + the stream. +*/ + +QDataStream &operator<<(QDataStream &s, const QPicture &r) +{ + quint32 size = r.d_func()->pictb.buffer().size(); + s << size; + // null picture ? + if (size == 0) + return s; + // just write the whole buffer to the stream + s.writeRawData (r.d_func()->pictb.buffer(), r.d_func()->pictb.buffer().size()); + return s; +} + +/*! + \relates QPicture + + Reads a picture from the stream \a s into picture \a r and returns + a reference to the stream. +*/ + +QDataStream &operator>>(QDataStream &s, QPicture &r) +{ + QDataStream sr; + + // "init"; this code is similar to the beginning of QPicture::cmd() + sr.setDevice(&r.d_func()->pictb); + sr.setVersion(r.d_func()->formatMajor); + quint32 len; + s >> len; + QByteArray data; + if (len > 0) { + data.resize(len); + s.readRawData(data.data(), len); + } + + r.d_func()->pictb.setData(data); + r.d_func()->resetFormat(); + return s; +} +#endif // QT_NO_DATASTREAM + + +#ifndef QT_NO_PICTUREIO + +QT_BEGIN_INCLUDE_NAMESPACE +#include "qregexp.h" +#include "qapplication.h" +#include "qpictureformatplugin.h" +QT_END_INCLUDE_NAMESPACE + +/*! + \obsolete + + Returns a string that specifies the picture format of the file \a + fileName, or 0 if the file cannot be read or if the format is not + recognized. + + \sa load() save() +*/ + +const char* QPicture::pictureFormat(const QString &fileName) +{ + return QPictureIO::pictureFormat(fileName); +} + +/*! + \obsolete + + Returns a list of picture formats that are supported for picture + input. + + \sa outputFormats() inputFormatList() QPictureIO +*/ +QList<QByteArray> QPicture::inputFormats() +{ + return QPictureIO::inputFormats(); +} + +static QStringList qToStringList(const QList<QByteArray> arr) +{ + QStringList list; + for (int i = 0; i < arr.count(); ++i) + list.append(QString::fromLatin1(arr.at(i))); + return list; +} + +/*! + \obsolete + + Returns a list of picture formats that are supported for picture + input. + + Note that if you want to iterate over the list, you should iterate + over a copy, e.g. + \snippet doc/src/snippets/picture/picture.cpp 2 + + \sa outputFormatList() inputFormats() QPictureIO +*/ +QStringList QPicture::inputFormatList() +{ + return qToStringList(QPictureIO::inputFormats()); +} + + +/*! + \obsolete + + Returns a list of picture formats that are supported for picture + output. + + Note that if you want to iterate over the list, you should iterate + over a copy, e.g. + \snippet doc/src/snippets/picture/picture.cpp 3 + + \sa inputFormatList() outputFormats() QPictureIO +*/ +QStringList QPicture::outputFormatList() +{ + return qToStringList(QPictureIO::outputFormats()); +} + +/*! + \obsolete + + Returns a list of picture formats that are supported for picture + output. + + \sa inputFormats() outputFormatList() QPictureIO +*/ +QList<QByteArray> QPicture::outputFormats() +{ + return QPictureIO::outputFormats(); +} + +/***************************************************************************** + QPictureIO member functions + *****************************************************************************/ + +/*! + \obsolete + + \class QPictureIO + + \brief The QPictureIO class contains parameters for loading and + saving pictures. + + \ingroup painting + \ingroup io + + QPictureIO contains a QIODevice object that is used for picture data + I/O. The programmer can install new picture file formats in addition + to those that Qt provides. + + You don't normally need to use this class; QPicture::load(), + QPicture::save(). + + \sa QPicture QPixmap QFile +*/ + +struct QPictureIOData +{ + QPicture pi; // picture + int iostat; // IO status + QByteArray frmt; // picture format + QIODevice *iodev; // IO device + QString fname; // file name + QString descr; // picture description + const char *parameters; + int quality; + float gamma; +}; + +/*! + Constructs a QPictureIO object with all parameters set to zero. +*/ + +QPictureIO::QPictureIO() +{ + init(); +} + +/*! + Constructs a QPictureIO object with the I/O device \a ioDevice and a + \a format tag. +*/ + +QPictureIO::QPictureIO(QIODevice *ioDevice, const char *format) +{ + init(); + d->iodev = ioDevice; + d->frmt = format; +} + +/*! + Constructs a QPictureIO object with the file name \a fileName and a + \a format tag. +*/ + +QPictureIO::QPictureIO(const QString &fileName, const char* format) +{ + init(); + d->frmt = format; + d->fname = fileName; +} + +/*! + Contains initialization common to all QPictureIO constructors. +*/ + +void QPictureIO::init() +{ + d = new QPictureIOData(); + d->parameters = 0; + d->quality = -1; // default quality of the current format + d->gamma=0.0f; + d->iostat = 0; + d->iodev = 0; +} + +/*! + Destroys the object and all related data. +*/ + +QPictureIO::~QPictureIO() +{ + if (d->parameters) + delete [] (char*)d->parameters; + delete d; +} + + +/***************************************************************************** + QPictureIO picture handler functions + *****************************************************************************/ + +class QPictureHandler +{ +public: + QPictureHandler(const char *f, const char *h, const QByteArray& fl, + picture_io_handler r, picture_io_handler w); + QByteArray format; // picture format + QRegExp header; // picture header pattern + enum TMode { Untranslated=0, TranslateIn, TranslateInOut } text_mode; + picture_io_handler read_picture; // picture read function + picture_io_handler write_picture; // picture write function + bool obsolete; // support not "published" +}; + +QPictureHandler::QPictureHandler(const char *f, const char *h, const QByteArray& fl, + picture_io_handler r, picture_io_handler w) + : format(f), header(QString::fromLatin1(h)) +{ + text_mode = Untranslated; + if (fl.contains('t')) + text_mode = TranslateIn; + else if (fl.contains('T')) + text_mode = TranslateInOut; + obsolete = fl.contains('O'); + read_picture = r; + write_picture = w; +} + +typedef QList<QPictureHandler *> QPHList; +Q_GLOBAL_STATIC(QPHList, pictureHandlers) + +#ifndef QT_NO_LIBRARY +Q_GLOBAL_STATIC(QMutex, mutex) +Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, factoryLoader, + (QPictureFormatInterface_iid, + QLatin1String("/pictureformats"))) +#endif +void qt_init_picture_plugins() +{ +#ifndef QT_NO_LIBRARY + QMutexLocker locker(mutex()); + QFactoryLoader *loader = factoryLoader(); + QStringList keys = loader->keys(); + for (int i = 0; i < keys.count(); ++i) + if (QPictureFormatInterface *format = qobject_cast<QPictureFormatInterface*>(loader->instance(keys.at(i)))) + format->installIOHandler(keys.at(i)); +#endif +} + +static void cleanup() +{ + // make sure that picture handlers are delete before plugin manager + if (QPHList *list = pictureHandlers()) { + qDeleteAll(*list); + list->clear(); + } +} + +void qt_init_picture_handlers() // initialize picture handlers +{ + static QBasicAtomicInt done = Q_BASIC_ATOMIC_INITIALIZER(0); + if (done.testAndSetRelaxed(0, 1)) { + qAddPostRoutine(cleanup); + } +} + +static QPictureHandler *get_picture_handler(const char *format) +{ // get pointer to handler + qt_init_picture_handlers(); + qt_init_picture_plugins(); + if (QPHList *list = pictureHandlers()) { + for (int i = 0; i < list->size(); ++i) { + if (list->at(i)->format == format) + return list->at(i); + } + } + return 0; // no such handler +} + + +/*! + Defines a picture I/O handler for the picture format called \a + format, which is recognized using the regular + expression defined in \a header, read using \a readPicture and + written using \a writePicture. + + \a flags is a string of single-character flags for this format. + The only flag defined currently is T (upper case), so the only + legal value for \a flags are "T" and the empty string. The "T" + flag means that the picture file is a text file, and Qt should treat + all newline conventions as equivalent. (XPM files and some PPM + files are text files for example.) + + \a format is used to select a handler to write a QPicture; \a header + is used to select a handler to read an picture file. + + If \a readPicture is a null pointer, the QPictureIO will not be able + to read pictures in \a format. If \a writePicture is a null pointer, + the QPictureIO will not be able to write pictures in \a format. If + both are null, the QPictureIO object is valid but useless. + + Example: + \snippet doc/src/snippets/picture/picture.cpp 6 + \codeline + \snippet doc/src/snippets/picture/picture.cpp 7 + \codeline + \snippet doc/src/snippets/picture/picture.cpp 8 + + Before the regular expression test, all the 0 bytes in the file header are + converted to 1 bytes. This is done because when Qt was ASCII-based, QRegExp + could not handle 0 bytes in strings. + + The regexp is only applied on the first 14 bytes of the file. + + (Note that if one handlerIO supports writing a format and another + supports reading it, Qt supports both reading and writing. If two + handlers support the same operation, Qt chooses one arbitrarily.) +*/ + +void QPictureIO::defineIOHandler(const char *format, + const char *header, + const char *flags, + picture_io_handler readPicture, + picture_io_handler writePicture) +{ + qt_init_picture_handlers(); + if (QPHList *list = pictureHandlers()) { + QPictureHandler *p; + p = new QPictureHandler(format, header, QByteArray(flags), readPicture, writePicture); + list->prepend(p); + } +} + + +/***************************************************************************** + QPictureIO normal member functions + *****************************************************************************/ + +/*! + Returns the picture currently set. + + \sa setPicture() +*/ +const QPicture &QPictureIO::picture() const { return d->pi; } + +/*! + Returns the picture's IO status. A non-zero value indicates an + error, whereas 0 means that the IO operation was successful. + + \sa setStatus() +*/ +int QPictureIO::status() const { return d->iostat; } + +/*! + Returns the picture format string or 0 if no format has been + explicitly set. +*/ +const char *QPictureIO::format() const { return d->frmt; } + +/*! + Returns the IO device currently set. + + \sa setIODevice() +*/ +QIODevice *QPictureIO::ioDevice() const { return d->iodev; } + +/*! + Returns the file name currently set. + + \sa setFileName() +*/ +QString QPictureIO::fileName() const { return d->fname; } + + +/*! + Returns the picture description string. + + \sa setDescription() +*/ +QString QPictureIO::description() const { return d->descr; } + +/*! + Sets the picture to \a picture. + + \sa picture() +*/ +void QPictureIO::setPicture(const QPicture &picture) +{ + d->pi = picture; +} + +/*! + Sets the picture IO status to \a status. A non-zero value indicates + an error, whereas 0 means that the IO operation was successful. + + \sa status() +*/ +void QPictureIO::setStatus(int status) +{ + d->iostat = status; +} + +/*! + Sets the picture format to \a format for the picture to be read or + written. + + It is necessary to specify a format before writing an picture, but + it is not necessary to specify a format before reading an picture. + + If no format has been set, Qt guesses the picture format before + reading it. If a format is set the picture will only be read if it + has that format. + + \sa read() write() format() +*/ +void QPictureIO::setFormat(const char *format) +{ + d->frmt = format; +} + +/*! + Sets the IO device to be used for reading or writing an picture. + + Setting the IO device allows pictures to be read/written to any + block-oriented QIODevice. + + If \a ioDevice is not null, this IO device will override file name + settings. + + \sa setFileName() +*/ +void QPictureIO::setIODevice(QIODevice *ioDevice) +{ + d->iodev = ioDevice; +} + +/*! + Sets the name of the file to read or write an picture from to \a + fileName. + + \sa setIODevice() +*/ +void QPictureIO::setFileName(const QString &fileName) +{ + d->fname = fileName; +} + +/*! + Returns the quality of the written picture, related to the + compression ratio. + + \sa setQuality() QPicture::save() +*/ +int QPictureIO::quality() const +{ + return d->quality; +} + +/*! + Sets the quality of the written picture to \a q, related to the + compression ratio. + + \a q must be in the range -1..100. Specify 0 to obtain small + compressed files, 100 for large uncompressed files. (-1 signifies + the default compression.) + + \sa quality() QPicture::save() +*/ + +void QPictureIO::setQuality(int q) +{ + d->quality = q; +} + +/*! + Returns the picture's parameters string. + + \sa setParameters() +*/ + +const char *QPictureIO::parameters() const +{ + return d->parameters; +} + +/*! + Sets the picture's parameter string to \a parameters. This is for + picture handlers that require special parameters. + + Although the current picture formats supported by Qt ignore the + parameters string, it may be used in future extensions or by + contributions (for example, JPEG). + + \sa parameters() +*/ + +void QPictureIO::setParameters(const char *parameters) +{ + if (d->parameters) + delete [] (char*)d->parameters; + d->parameters = qstrdup(parameters); +} + +/*! + Sets the gamma value at which the picture will be viewed to \a + gamma. If the picture format stores a gamma value for which the + picture is intended to be used, then this setting will be used to + modify the picture. Setting to 0.0 will disable gamma correction + (i.e. any specification in the file will be ignored). + + The default value is 0.0. + + \sa gamma() +*/ +void QPictureIO::setGamma(float gamma) +{ + d->gamma=gamma; +} + +/*! + Returns the gamma value at which the picture will be viewed. + + \sa setGamma() +*/ +float QPictureIO::gamma() const +{ + return d->gamma; +} + +/*! + Sets the picture description string for picture handlers that support + picture descriptions to \a description. + + Currently, no picture format supported by Qt uses the description + string. +*/ + +void QPictureIO::setDescription(const QString &description) +{ + d->descr = description; +} + + +/*! + Returns a string that specifies the picture format of the file \a + fileName, or null if the file cannot be read or if the format is + not recognized. +*/ + +QByteArray QPictureIO::pictureFormat(const QString &fileName) +{ + QFile file(fileName); + QByteArray format; + if (!file.open(QIODevice::ReadOnly)) + return format; + format = pictureFormat(&file); + file.close(); + return format; +} + +/*! + \overload + + Returns a string that specifies the picture format of the picture read + from IO device \a d, or 0 if the device cannot be read or if the + format is not recognized. + + Make sure that \a d is at the right position in the device (for + example, at the beginning of the file). + + \sa QIODevice::at() +*/ + +QByteArray QPictureIO::pictureFormat(QIODevice *d) +{ + // if you change this change the documentation for defineIOHandler() + const int buflen = 14; + + char buf[buflen]; + char buf2[buflen]; + qt_init_picture_handlers(); + qt_init_picture_plugins(); + int pos = d->pos(); // save position + int rdlen = d->read(buf, buflen); // read a few bytes + + QByteArray format; + if (rdlen != buflen) + return format; + + memcpy(buf2, buf, buflen); + + for (int n = 0; n < rdlen; n++) + if (buf[n] == '\0') + buf[n] = '\001'; + if (rdlen > 0) { + buf[rdlen - 1] = '\0'; + QString bufStr = QString::fromLatin1(buf); + if (QPHList *list = pictureHandlers()) { + for (int i = 0; i < list->size(); ++i) { + if (list->at(i)->header.indexIn(bufStr) != -1) { // try match with headers + format = list->at(i)->format; + break; + } + } + } + } + d->seek(pos); // restore position + return format; +} + +/*! + Returns a sorted list of picture formats that are supported for + picture input. +*/ +QList<QByteArray> QPictureIO::inputFormats() +{ + QList<QByteArray> result; + + qt_init_picture_handlers(); + qt_init_picture_plugins(); + + if (QPHList *list = pictureHandlers()) { + for (int i = 0; i < list->size(); ++i) { + QPictureHandler *p = list->at(i); + if (p->read_picture && !p->obsolete && !result.contains(p->format)) + result.append(p->format); + } + } + qSort(result); + + return result; +} + +/*! + Returns a sorted list of picture formats that are supported for + picture output. +*/ +QList<QByteArray> QPictureIO::outputFormats() +{ + qt_init_picture_handlers(); + qt_init_picture_plugins(); + + QList<QByteArray> result; + if (QPHList *list = pictureHandlers()) { + for (int i = 0; i < list->size(); ++i) { + QPictureHandler *p = list->at(i); + if (p->write_picture && !p->obsolete && !result.contains(p->format)) + result.append(p->format); + } + } + return result; +} + + + +/*! + Reads an picture into memory and returns true if the picture was + successfully read; otherwise returns false. + + Before reading an picture you must set an IO device or a file name. + If both an IO device and a file name have been set, the IO device + will be used. + + Setting the picture file format string is optional. + + Note that this function does \e not set the \link format() + format\endlink used to read the picture. If you need that + information, use the pictureFormat() static functions. + + Example: + + \snippet doc/src/snippets/picture/picture.cpp 4 + + \sa setIODevice() setFileName() setFormat() write() QPixmap::load() +*/ +bool QPictureIO::read() +{ + QFile file; + const char *picture_format; + QPictureHandler *h; + + if (d->iodev) { // read from io device + // ok, already open + } else if (!d->fname.isEmpty()) { // read from file + file.setFileName(d->fname); + if (!file.open(QIODevice::ReadOnly)) + return false; // cannot open file + d->iodev = &file; + } else { // no file name or io device + return false; + } + if (d->frmt.isEmpty()) { + // Try to guess format + picture_format = pictureFormat(d->iodev); // get picture format + if (!picture_format) { + if (file.isOpen()) { // unknown format + file.close(); + d->iodev = 0; + } + return false; + } + } else { + picture_format = d->frmt; + } + + h = get_picture_handler(picture_format); + if (file.isOpen()) { +#if !defined(Q_OS_UNIX) + if (h && h->text_mode) { // reopen in translated mode + file.close(); + file.open(QIODevice::ReadOnly | QIODevice::Text); + } + else +#endif + file.seek(0); // position to start + } + d->iostat = 1; // assume error + + if (h && h->read_picture) + (*h->read_picture)(this); + + if (file.isOpen()) { // picture was read using file + file.close(); + d->iodev = 0; + } + return d->iostat == 0; // picture successfully read? +} + + +/*! + Writes an picture to an IO device and returns true if the picture was + successfully written; otherwise returns false. + + Before writing an picture you must set an IO device or a file name. + If both an IO device and a file name have been set, the IO device + will be used. + + The picture will be written using the specified picture format. + + Example: + \snippet doc/src/snippets/picture/picture.cpp 5 + + \sa setIODevice() setFileName() setFormat() read() QPixmap::save() +*/ +bool QPictureIO::write() +{ + if (d->frmt.isEmpty()) + return false; + QPictureHandler *h = get_picture_handler(d->frmt); + if (!h || !h->write_picture) { + qWarning("QPictureIO::write: No such picture format handler: %s", + format()); + return false; + } + QFile file; + if (!d->iodev && !d->fname.isEmpty()) { + file.setFileName(d->fname); + bool translate = h->text_mode==QPictureHandler::TranslateInOut; + QIODevice::OpenMode fmode = translate ? QIODevice::WriteOnly | QIODevice::Text : QIODevice::OpenMode(QIODevice::WriteOnly); + if (!file.open(fmode)) // couldn't create file + return false; + d->iodev = &file; + } + d->iostat = 1; + (*h->write_picture)(this); + if (file.isOpen()) { // picture was written using file + file.close(); + d->iodev = 0; + } + return d->iostat == 0; // picture successfully written? +} +#endif //QT_NO_PICTUREIO + +/*! + \fn QPicture QPicture::copy() const + + Use simple assignment instead. +*/ + +QT_END_NAMESPACE + +#endif // QT_NO_PICTURE + +/*! + \typedef QPicture::DataPtr + \internal +*/ + +/*! + \fn DataPtr &QPicture::data_ptr() + \internal +*/ |