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Make qt_findAtNxFile return the source device pixel ratio

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QTextImageHandler needs it.
And QQuickImageBase will also need it.

Change-Id: Ica5d17519c4c6c06e25bab7d2b1d3733f4058425
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
This commit is contained in:
Olivier Goffart 2015-11-11 15:32:29 +01:00 committed by Olivier Goffart (Woboq GmbH)
parent 45be405408
commit d6b45853f5
3 changed files with 23 additions and 11 deletions
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11
src/gui/image/qicon.cpp
View File

@ -1378,8 +1378,12 @@ QDebug operator<<(QDebug dbg, const QIcon &i)
Given base foo.png and a target dpr of 2.5, this function will look for
foo@3x.png, then foo@2x, then fall back to foo.png if not found.
\a sourceDevicePixelRatio will be set to the value of N if the argument is
a non-null pointer
*/
QString qt_findAtNxFile(const QString &baseFileName, qreal targetDevicePixelRatio)
QString qt_findAtNxFile(const QString &baseFileName, qreal targetDevicePixelRatio,
qreal *sourceDevicePixelRatio)
{
if (targetDevicePixelRatio <= 1.0)
return baseFileName;
@ -1397,9 +1401,12 @@ QString qt_findAtNxFile(const QString &baseFileName, qreal targetDevicePixelRati
for (int n = qCeil(targetDevicePixelRatio); n > 1; --n) {
QString atNxfileName = baseFileName;
atNxfileName.insert(dotIndex, atNx.arg(n));
if (QFile::exists(atNxfileName))
if (QFile::exists(atNxfileName)) {
if (sourceDevicePixelRatio)
*sourceDevicePixelRatio = n;
return atNxfileName;
}
}
return baseFileName;
}

3
src/gui/image/qicon.h
View File

@ -139,7 +139,8 @@ Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QIcon &);
Q_GUI_EXPORT QDebug operator<<(QDebug dbg, const QIcon &);
#endif
Q_GUI_EXPORT QString qt_findAtNxFile(const QString &baseFileName, qreal targetDevicePixelRatio);
Q_GUI_EXPORT QString qt_findAtNxFile(const QString &baseFileName, qreal targetDevicePixelRatio,
qreal *sourceDevicePixelRatio = Q_NULLPTR);
QT_END_NAMESPACE

20
src/gui/text/qtextimagehandler.cpp
View File

@ -44,8 +44,10 @@
QT_BEGIN_NAMESPACE
extern QString qt_findAtNxFile(const QString &baseFileName, qreal targetDevicePixelRatio);
static QString resolveFileName(QString fileName, QUrl *url, qreal targetDevicePixelRatio)
extern QString qt_findAtNxFile(const QString &baseFileName, qreal targetDevicePixelRatio,
qreal *sourceDevicePixelRatio);
static QString resolveFileName(QString fileName, QUrl *url, qreal targetDevicePixelRatio,
qreal *sourceDevicePixelRatio)
{
// We might use the fileName for loading if url loading fails
// try to make sure it is a valid file path.
@ -64,7 +66,7 @@ static QString resolveFileName(QString fileName, QUrl *url, qreal targetDevicePi
return fileName;
// try to find a Nx version
return qt_findAtNxFile(fileName, targetDevicePixelRatio);
return qt_findAtNxFile(fileName, targetDevicePixelRatio, sourceDevicePixelRatio);
}
@ -76,7 +78,8 @@ static QPixmap getPixmap(QTextDocument *doc, const QTextImageFormat &format, con
if (name.startsWith(QLatin1String(":/"))) // auto-detect resources and convert them to url
name.prepend(QLatin1String("qrc"));
QUrl url = QUrl(name);
name = resolveFileName(name, &url, devicePixelRatio);
qreal sourcePixelRatio = 1.0;
name = resolveFileName(name, &url, devicePixelRatio, &sourcePixelRatio);
const QVariant data = doc->resource(QTextDocument::ImageResource, url);
if (data.type() == QVariant::Pixmap || data.type() == QVariant::Image) {
pm = qvariant_cast<QPixmap>(data);
@ -102,7 +105,7 @@ static QPixmap getPixmap(QTextDocument *doc, const QTextImageFormat &format, con
}
if (name.contains(QStringLiteral("@2x")))
pm.setDevicePixelRatio(2.0);
pm.setDevicePixelRatio(sourcePixelRatio);
return pm;
}
@ -157,7 +160,8 @@ static QImage getImage(QTextDocument *doc, const QTextImageFormat &format, const
if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
name.prepend(QLatin1String("qrc"));
QUrl url = QUrl(name);
name = resolveFileName(name, &url, devicePixelRatio);
qreal sourcePixelRatio = 1.0;
name = resolveFileName(name, &url, devicePixelRatio, &sourcePixelRatio);
const QVariant data = doc->resource(QTextDocument::ImageResource, url);
if (data.type() == QVariant::Image) {
image = qvariant_cast<QImage>(data);
@ -181,8 +185,8 @@ static QImage getImage(QTextDocument *doc, const QTextImageFormat &format, const
doc->addResource(QTextDocument::ImageResource, url, image);
}
if (name.contains(QStringLiteral("@2x")))
image.setDevicePixelRatio(2.0);
if (sourcePixelRatio != 1.0)
image.setDevicePixelRatio(sourcePixelRatio);
return image;
}