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#
# Copyright (c) 1995 Regents of the University of California.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the Network Research
# Group at Lawrence Berkeley National Laboratory.
# 4. Neither the name of the University nor of the Laboratory may be used
# to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
# Handle commands that come over conference bus for manipulating
# overlaid images (e.g., from a title generator).
#
proc tm_bootstrap {} {
global tm411 tm422
if ![info exists tm411] {
set tm411 [new module compositor/411]
set tm422 [new module compositor/422]
}
}
proc tm_init { grabber encoder } {
global tmEnable
if ![info exists tmEnable] {
return 0
}
set ff [$encoder frame-format]
if { $ff == "cif" } {
set ff 411
}
if { $ff == "411" || $ff == "422" } {
global tm411 tm422
tm_bootstrap
set tm [set tm$ff]
$tm target $encoder
$grabber target $tm
return 1
} else {
return 0
}
}
proc tm_enable {} {
global tmEnable V
if [info exists tmEnable] {
return
}
set tmEnable 1
if [have grabber] {
tm_init $V(grabber) $V(encoder)
}
}
proc tm_disable {} {
global tmEnable V
catch "unset tmEnable"
if [have grabber] {
# remove the title-maker from the path
# XXX this assumes the title-maker is the only
# intervening modules
$V(grabber) target $V(encoder)
}
}
proc tm_check id {
global tm_obj
return [info exists tm_obj($id)]
}
proc tm_create { id file width height } {
puts create/$id/$file/$width/$height
global tm_obj
if [tm_check $id] {
tm_destroy $id
}
set tm_obj($id) [new overlay]
#XXX check for error
$tm_obj($id) load $file $width $height
tm_bootstrap
}
proc tm_transparent { id lum } {
puts transparent:$id/$lum
global tm_obj
if [tm_check $id] {
set o $tm_obj($id)
$o transparent $lum
}
}
proc tm_destroy id {
global tm411 tm422 tm_obj
if [tm_check $id] {
set o $tm_obj($id)
unset tm_obj($id)
$tm411 detach $o
$tm422 detach $o
delete $o
}
}
proc tm_place { id x y depth } {
global tm411 tm422 tm_obj tm_depth
if [tm_check $id] {
set o $tm_obj($id)
if { ![info exists tm_depth($o)] } {
set tm_depth($o) $depth
$tm411 attach $o $x $y $depth
$tm422 attach $o $x $y $depth
} elseif { $tm_depth($o) != $depth } {
set tm_depth($o) $depth
$tm411 detach $o
$tm422 detach $o
$tm411 attach $o $x $y $depth
$tm422 attach $o $x $y $depth
} else {
$tm411 move $o $x $y
$tm422 move $o $x $y
}
}
}
proc tm_remove id {
global tm411 tm422 tm_obj
if [tm_check $id] {
set o $tm_obj($id)
unset tm_obj($id)
$tm411 detach $o
$tm422 detach $o
delete $o
}
}
#
# initialize the dispatch table with the title-maker API
#
foreach proc { tm_enable tm_disable tm_create tm_destroy \
tm_place tm_remove tm_transparent } {
set cb_dispatch($proc) $proc
}
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