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kdeui: optimize icon loader

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pixmap data is explicity shared and there is no need to insert multiple
pixmaps with the same key into the cache

Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
This commit is contained in:
Ivailo Monev 2019-05-28 15:09:14 +00:00
parent 74efdc02ad
commit fdfa8de248
1 changed files with 5 additions and 70 deletions
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75
kdeui/icons/kiconloader.cpp
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@ -33,9 +33,6 @@
#include <QtCore/QCache>
#include <QtCore/QFileInfo>
#include <QtCore/QDir>
#include <QtCore/QBuffer>
#include <QtCore/QDataStream>
#include <QtCore/QByteArray>
#include <QtGui/QIcon>
#include <QtGui/QImage>
#include <QtGui/QMovie>
@ -156,7 +153,6 @@ public:
KIconLoaderPrivate(KIconLoader *q)
: q(q)
, mpGroups(0)
, mIconCache(0)
{
}
@ -166,7 +162,6 @@ public:
deleted when the elements of d->links are deleted */
qDeleteAll(links);
delete[] mpGroups;
delete mIconCache;
}
/**
@ -280,16 +275,13 @@ public:
KIconEffect mpEffect;
QList<KIconThemeNode *> links;
// This shares the icons across all processes
QSharedPointer<QCache<QString, QByteArray> >* mIconCache;
// This caches rendered QPixmaps in just this process.
QCache<QString, PixmapWithPath> mPixmapCache;
bool extraDesktopIconsLoaded :1;
bool extraDesktopIconsLoaded;
// lazy loading: initIconThemes() is only needed when the "links" list is needed
// mIconThemeInited is used inside initIconThemes() to init only once
bool mIconThemeInited :1;
bool mIconThemeInited;
QString appname;
void drawOverlays(const KIconLoader *loader, KIconLoader::Group group, int state, QPixmap& pix, const QStringList& overlays);
@ -441,7 +433,6 @@ KIconLoader::KIconLoader(const KComponentData &componentData, QObject* parent)
void KIconLoader::reconfigure( const QString& _appname, KStandardDirs *_dirs )
{
d->mIconCache->clear();
delete d;
d = new KIconLoaderPrivate(this);
d->init( _appname, _dirs );
@ -463,8 +454,6 @@ void KIconLoaderPrivate::init( const QString& _appname, KStandardDirs *_dirs )
appname = KGlobal::mainComponent().componentName();
// Initialize icon cache
mIconCache = new QSharedPointer<QCache<QString, QByteArray> >(new QCache<QString, QByteArray>());
mIconCache->data()->setMaxCost(10240);
mPixmapCache.setMaxCost(10240);
// These have to match the order in kicontheme.h
@ -803,29 +792,12 @@ void KIconLoaderPrivate::insertCachedPixmapWithPath(
return;
}
if (mPixmapCache.contains(key)) {
return;
}
// Even if the pixmap is null, we add it to the caches so that we record
// the fact that whatever icon led to us getting a null pixmap doesn't
// exist.
QBuffer output;
output.open(QIODevice::WriteOnly);
QDataStream outputStream(&output);
outputStream.setVersion(QDataStream::Qt_4_6);
outputStream << path;
// Convert the QPixmap to PNG. This is actually done by Qt's own operator.
outputStream << data;
output.close();
// The byte array contained in the QBuffer is what we want in the cache
// and we do not want a reference to the buffer so hard-copy it.
mIconCache->data()->insert(key, new QByteArray(output.buffer()));
// Also insert the object into our process-local cache for even more
// speed.
PixmapWithPath *pixmapPath = new PixmapWithPath;
pixmapPath->pixmap = data;
pixmapPath->path = path;
@ -845,43 +817,6 @@ bool KIconLoaderPrivate::findCachedPixmapWithPath(const QString &key, QPixmap &d
return true;
}
// Otherwise try to find it in our shared memory cache since that will
// be quicker than the disk, especially for SVGs.
QByteArray *result = mIconCache->data()->object(key);
if (!result || result->isEmpty()) {
return false;
}
QBuffer buffer;
buffer.setBuffer(result);
buffer.open(QIODevice::ReadOnly);
QDataStream inputStream(&buffer);
inputStream.setVersion(QDataStream::Qt_4_6);
QString tempPath;
inputStream >> tempPath;
if (inputStream.status() == QDataStream::Ok) {
QPixmap tempPixmap;
inputStream >> tempPixmap;
if (inputStream.status() == QDataStream::Ok) {
data = tempPixmap;
path = tempPath;
// Since we're here we didn't have a QPixmap cache entry, add one now.
PixmapWithPath *newPixmapWithPath = new PixmapWithPath;
newPixmapWithPath->pixmap = data;
newPixmapWithPath->path = path;
mPixmapCache.insert(key, newPixmapWithPath, data.width() * data.height() + 1);
return true;
}
}
return false;
}