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authordkf <donal.k.fellows@manchester.ac.uk>2002-06-14 13:35:46 (GMT)
committerdkf <donal.k.fellows@manchester.ac.uk>2002-06-14 13:35:46 (GMT)
commit8abf69416e48492ccda18dcfc6e8adf9d33d0a32 (patch)
treec4ad54b29f443e940a51b7b0ca0a9c57e5b65adc /doc/photo.n
parent8c18f8111d03425255bcd1d60b70da5c9ae5f521 (diff)
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TIP#98 implementation; improved photo image copy and GIF frame access
Diffstat (limited to 'doc/photo.n')
-rw-r--r--doc/photo.n14
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?