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Diffstat (limited to 'doc/photo.n')
| -rw-r--r-- | doc/photo.n | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/doc/photo.n b/doc/photo.n index 5e16f92..83a5966 100644 --- a/doc/photo.n +++ b/doc/photo.n @@ -9,7 +9,7 @@ '\" Department of Computer Science, '\" Australian National University. '\" -'\" RCS: @(#) $Id: photo.n,v 1.10 2002/03/14 10:19:40 dkf Exp $ +'\" RCS: @(#) $Id: photo.n,v 1.11 2002/06/14 13:35:47 dkf Exp $ '\" .so man.macros .TH photo n 4.0 Tk "Tk Built-In Commands" @@ -189,6 +189,18 @@ only every \fIx\fRth pixel in the X direction and \fIy\fRth pixel in the Y direction. Negative values will cause the image to be flipped about the Y or X axes, respectively. If \fIy\fR is not given, the default value is the same as \fIx\fR. +.TP +\fB\-compositingrule \fIrule\fR +.VS 8.4 +Specifies how transparent pixels in the source image are combined with +the destination image. When a compositing rule of \fIoverlay\fR is +set, the old contents of the destination image are visible, as if the +source image were printed on a piece of transparent film and placed +over the top of the destination. When a compositing rule of \fIset\R +is set, the old contents of the destination image are discarded and +the source image is used as-is. The default compositing rule is +\fIoverlay\fR. +.VE 8.4 .RE .TP \fIimageName \fBdata ?\fIoption value(s) ...\fR? |