summaryrefslogtreecommitdiffstats
path: root/src/qt3support/painting/q3picture.cpp
blob: c2aae078cb170b0e68fe9ee9a01eecc2cbbfc753 (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
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Qt3Support 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 "private/qpicture_p.h"
#include "qfile.h"
#include "qpainter.h"
#include "q3picture.h"
#include "q3paintengine_svg_p.h"

QT_BEGIN_NAMESPACE

class Q3SvgDevice : public QPaintDevice
{
public:
    Q3SvgDevice() : QPaintDevice() {}
    bool load(QIODevice *dev) { return svgEngine.load(dev); }
    bool save(const QString &fileName) { return svgEngine.save(fileName); }
    bool save(QIODevice *dev) { return svgEngine.save(dev); }
    void setBoundingRect(const QRect &rect) { svgEngine.setBoundingRect(rect); }
    QRect boundingRect() const { return svgEngine.boundingRect(); }
    QPaintEngine *paintEngine() const { return (QPaintEngine *)&svgEngine; }
    bool play(QPainter *p) { return svgEngine.play(p); }
    int metric(PaintDeviceMetric m) const;

private:
    Q3SVGPaintEngine svgEngine;
};

int Q3SvgDevice::metric(PaintDeviceMetric m) const
{
        int val;
        QRect br = svgEngine.boundingRect();
        switch (m) {
        case PdmWidth:
            val = br.width();
            break;
        case PdmHeight:
            val = br.height();
            break;
        case PdmWidthMM:
            val = int(25.4/72.0*br.width());
            break;
        case PdmHeightMM:
            val = int(25.4/72.0*br.height());
            break;
        case PdmDpiX:
            val = 72;
            break;
        case PdmDpiY:
            val = 72;
            break;
        case PdmNumColors:
            val = 16777216;
            break;
        case PdmDepth:
            val = 24;
            break;
        default:
            val = 0;
            qWarning("Q3SvgDevice::metric: Invalid metric command");
        }
        return val;
}

/*!
    \class Q3Picture
    \brief The Q3Picture class is a paint device that records and
    replays Q3Painter commands.

    \compat

    Q3Picture can also read and write SVG (Scalable Vector Graphics)
    files, a \l{http://www.w3.org/Graphics/SVG/} {W3C} XML format.
    Note that when using the load() and save() functions to read and
    write SVG files, the format must be specified.

    \sa QPicture
*/

/*!
    \fn Q3Picture::Q3Picture()

    Constructs a Q3Picture.
*/

/*!
    \fn Q3Picture::Q3Picture(const QPicture &other)

    Constructs a copy of \a other.
*/

/*!
    \overload
    Loads the picture in the specified \a format from a file with the
    given \a fileName. Returns true if the file is loaded successfully;
    otherwise returns false.
*/
bool Q3Picture::load(const QString &fileName, const char *format)
{
    QFile f(fileName);
    if (!f.open(QIODevice::ReadOnly))
        return false;
    return load(&f, format);
}

/*!
    \fn bool Q3Picture::load(QIODevice *device, const char *format)

    Loads the picture in the specified \a format from the given \a device.
    Returns true if the file is loaded successfully; otherwise returns false.

    Note that when using the load() function to read SVG files, the
    format must be specified. For example:

    \snippet doc/src/snippets/code/src_qt3support_painting_q3picture.cpp 0

    \sa save()
*/
bool Q3Picture::load(QIODevice *dev, const char *format)
{
    if (qstrcmp(format, "svg" ) == 0) {
	Q3SvgDevice svg;
	if (!svg.load(dev))
	    return false;
        QPainter p(this);
        p.setRenderHint(QPainter::Antialiasing);
	bool b = svg.play(&p);
	d_func()->brect = svg.boundingRect();
	return b;
    }
    return QPicture::load(dev, format);
}

/*!
    \overload
    Saves the picture in the specified \a format to the file with the
    given \a fileName.

    \sa load()
*/
bool Q3Picture::save(const QString &fileName, const char *format)
{
    if (paintingActive()) {
        qWarning("Q3Picture::save: still being painted on. "
                  "Call QPainter::end() first");
        return false;
    }

    // identical to QIODevice* code below but the file name
    // makes a difference when it comes to saving pixmaps
    if (qstricmp( format, "svg") == 0) {
	Q3SvgDevice svg;
	QPainter p(&svg);
	if (!play(&p))
	    return false;
	svg.setBoundingRect(boundingRect());
	return svg.save(fileName);
    }

    return QPicture::save(fileName, format);
}

/*!
    \fn bool Q3Picture::save(QIODevice *device, const char *format)

    Saves the picture in the specified \a format to the given \a device.
    Returns true if the save is successful. Returns false if, for
    example, the picture is still being painted, i.e., QPainter::end()
    has not yet been called.

    Note that when using the save() function to save SVG files, the
    format must be specified. For example:

    \snippet doc/src/snippets/code/src_qt3support_painting_q3picture.cpp 1

    \sa load()
*/
bool Q3Picture::save(QIODevice *dev, const char *format)
{
    if (paintingActive()) {
        qWarning("Q3Picture::save: still being painted on. "
                  "Call QPainter::end() first");
        return false;
    }

    if (qstricmp(format, "svg") == 0) {
	Q3SvgDevice svg;
	QPainter p(&svg);
	if (!play(&p))
	    return false;
	svg.setBoundingRect(boundingRect());
	return svg.save(dev);
    }
    return QPicture::save(dev, format);
}

QT_END_NAMESPACE