diff options
Diffstat (limited to 'src/kfilepreviewgenerator.cpp')
| -rw-r--r-- | src/kfilepreviewgenerator.cpp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/kfilepreviewgenerator.cpp b/src/kfilepreviewgenerator.cpp index f614aae63..cbbb861ec 100644 --- a/src/kfilepreviewgenerator.cpp +++ b/src/kfilepreviewgenerator.cpp @@ -36,6 +36,12 @@ #include <QScrollBar> #include <QIcon> +#ifdef Q_WS_X11 +# include <QX11Info> +# include <X11/Xlib.h> +# include <X11/extensions/Xrender.h> +#endif + /** * If the passed item view is an instance of QListView, expensive * layout operations are blocked in the constructor and are unblocked @@ -575,7 +581,35 @@ bool KFilePreviewGenerator::Private::applyImageFrame(QPixmap& icon) void KFilePreviewGenerator::Private::limitToSize(QPixmap& icon, const QSize& maxSize) { if ((icon.width() > maxSize.width()) || (icon.height() > maxSize.height())) { +#ifdef Q_WS_X11 + // Assume that the texture size limit is 2048x2048 + if ((icon.width() <= 2048) && (icon.height() <= 2048)) { + QSize size = icon.size(); + size.scale(maxSize, Qt::KeepAspectRatio); + + const qreal factor = size.width() / qreal(icon.width()); + + XTransform xform = {{ + { XDoubleToFixed(1 / factor), 0, 0 }, + { 0, XDoubleToFixed(1 / factor), 0 }, + { 0, 0, XDoubleToFixed(1) } + }}; + + QPixmap pixmap(size); + pixmap.fill(Qt::transparent); + + Display *dpy = QX11Info::display(); + XRenderSetPictureFilter(dpy, icon.x11PictureHandle(), FilterBilinear, 0, 0); + XRenderSetPictureTransform(dpy, icon.x11PictureHandle(), &xform); + XRenderComposite(dpy, PictOpOver, icon.x11PictureHandle(), None, pixmap.x11PictureHandle(), + 0, 0, 0, 0, 0, 0, pixmap.width(), pixmap.height()); + icon = pixmap; + } else { + icon = icon.scaled(maxSize, Qt::KeepAspectRatio, Qt::FastTransformation); + } +#else icon = icon.scaled(maxSize, Qt::KeepAspectRatio, Qt::FastTransformation); +#endif } } |