diff options
Diffstat (limited to 'doc/src/platforms/emb-directfb-EmbLinux.qdoc')
-rw-r--r-- | doc/src/platforms/emb-directfb-EmbLinux.qdoc | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/doc/src/platforms/emb-directfb-EmbLinux.qdoc b/doc/src/platforms/emb-directfb-EmbLinux.qdoc index 74f2aaa..9e060f8 100644 --- a/doc/src/platforms/emb-directfb-EmbLinux.qdoc +++ b/doc/src/platforms/emb-directfb-EmbLinux.qdoc @@ -267,7 +267,8 @@ perform well. \o QT_NO_DIRECTFB_IMAGEPROVIDER \o By default Qt will use DirectFB to load QPixmaps from disk/memory. If your DirectFB implementation does not support this it might make sense to -define this. +define this. If you see strange rendering issues with pixmaps that have an +alpha channel defining this could solve the problem. \row \o QT_DIRECTFB_IMAGEPROVIDER_KEEPALIVE @@ -327,4 +328,9 @@ QT_DIRECTFB_DISABLE_RASTERFALLBACKS is defined, DirectFB will only return instead of falling back to QRasterPaintEngine. Please note that these defines should only be used when optimizing the application. +\section2 Top level transparency +\note DirectFB supports partially or fully transparent top level windows, +either through QWidget::setWindowOpacity or through setting a non-opaque +background brush. Note that for the latter it is not supported to change an +opaque window to be transparent at runtime. */ |