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
|
// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "imagecachefontcollector.h"
#include <QtGui/qrawfont.h>
#include <QtGui/qpainter.h>
#include <QtGui/qimage.h>
#include <QtGui/qfontdatabase.h>
#include <QtGui/qfontmetrics.h>
#include <QtGui/qicon.h>
#include <QtCore/qfileinfo.h>
namespace QmlDesigner {
ImageCacheFontCollector::ImageCacheFontCollector() = default;
ImageCacheFontCollector::~ImageCacheFontCollector() = default;
namespace {
QByteArray fileToByteArray(QString const &filename)
{
QFile file(filename);
QFileInfo fileInfo(file);
if (fileInfo.exists() && file.open(QFile::ReadOnly))
return file.readAll();
return {};
}
// Returns font id or -1 in case of failure
static int resolveFont(const QString &fontFile, QFont &outFont)
{
int fontId = -1;
QByteArray fontData(fileToByteArray(fontFile));
if (!fontData.isEmpty()) {
fontId = QFontDatabase::addApplicationFontFromData(fontData);
if (fontId != -1) {
QRawFont rawFont(fontData, 10.); // Pixel size is irrelevant, we only need style/weight
const QStringList families = QFontDatabase::applicationFontFamilies(fontId);
if (!families.isEmpty()) {
QString fontFamily = families.first();
outFont.setFamily(fontFamily);
outFont.setStyle(rawFont.style());
outFont.setStyleName(rawFont.styleName());
outFont.setWeight(QFont::Weight(rawFont.weight()));
}
}
}
return fontId;
}
static QImage createFontImage(const QString &text, const QColor &textColor, const QFont &font,
const QSize &size)
{
QRect rect({0, 0}, size);
QImage image(size, QImage::Format_ARGB32);
image.fill(Qt::transparent);
int pixelSize(200);
int flags = Qt::AlignCenter;
QFont renderFont = font;
while (pixelSize >= 2) {
renderFont.setPixelSize(pixelSize);
QFontMetrics fm(renderFont, &image);
QRect bounds = fm.boundingRect(rect, flags, text);
if (bounds.width() < rect.width() && bounds.height() < rect.height()) {
break;
} else {
int newPixelSize = pixelSize - 1;
if (bounds.width() >= rect.width())
newPixelSize = int(qreal(pixelSize) * qreal(rect.width()) / qreal(bounds.width()));
else if (bounds.height() >= rect.height())
newPixelSize = int(qreal(pixelSize) * qreal(rect.height()) / qreal(bounds.height()));
if (newPixelSize < pixelSize)
pixelSize = newPixelSize;
else
--pixelSize;
}
}
QPainter painter(&image);
painter.setPen(textColor);
painter.setFont(renderFont);
painter.drawText(rect, flags, text);
return image;
}
} // namespace
void ImageCacheFontCollector::start(Utils::SmallStringView name,
Utils::SmallStringView,
const ImageCache::AuxiliaryData &auxiliaryDataValue,
CaptureCallback captureCallback,
AbortCallback abortCallback)
{
QFont font;
if (resolveFont(QString(name), font) >= 0) {
auto &&auxiliaryData = std::get<ImageCache::FontCollectorSizeAuxiliaryData>(auxiliaryDataValue);
QColor textColor = auxiliaryData.colorName;
QSize size = auxiliaryData.size;
QString text = font.family() + "\n" + auxiliaryData.text;
QImage image = createFontImage(text, textColor, font, size);
if (!image.isNull()) {
captureCallback(std::move(image), {}, {});
return;
}
}
abortCallback(ImageCache::AbortReason::Failed);
}
ImageCacheCollectorInterface::ImageTuple ImageCacheFontCollector::createImage(
Utils::SmallStringView name,
Utils::SmallStringView,
const ImageCache::AuxiliaryData &auxiliaryDataValue)
{
QFont font;
if (resolveFont(QString(name), font) >= 0) {
auto &&auxiliaryData = std::get<ImageCache::FontCollectorSizeAuxiliaryData>(auxiliaryDataValue);
QColor textColor = auxiliaryData.colorName;
QSize size = auxiliaryData.size;
QString text = font.family() + "\n\n" + auxiliaryData.text;
QImage image = createFontImage(text, textColor, font, size);
if (!image.isNull())
return {image, {}, {}};
}
return {};
}
QIcon ImageCacheFontCollector::createIcon(Utils::SmallStringView name,
Utils::SmallStringView,
const ImageCache::AuxiliaryData &auxiliaryDataValue)
{
QIcon icon;
QFont font;
if (resolveFont(QString(name), font) >= 0) {
auto &&auxiliaryData = std::get<ImageCache::FontCollectorSizesAuxiliaryData>(auxiliaryDataValue);
QColor textColor = auxiliaryData.colorName;
const auto sizes = auxiliaryData.sizes;
QString text = auxiliaryData.text;
for (QSize size : sizes) {
QImage image = createFontImage(text, textColor, font, size);
if (!image.isNull())
icon.addPixmap(QPixmap::fromImage(image));
}
}
return icon;
}
} // namespace QmlDesigner
|
