LiVES rendered effect plugin script
------------------------------------

<define>
|1.7
</define>

<name>
skip_forwards
</name>

<version>
1
</version>

<author>
Salsaman|
</author>

# Menu entry|Action description|min_frames|num_channels|
<description>
Skip forward|Applying forward skip to|2|1|
</description>

# requirements (list)
<requires>
composite
</requires>


<params>
skipahead|_Skip ahead|num0|10|1|100|
fadestart|_Fade start|num0|50|0|100
fadeend|Fade _end|num0|50|0|100
</params>

<param_window>
</param_window>

# properties/capabilities (bitmap field)
# 0x0001 == slow (hint to GUI)
<properties>
0x0000
</properties>

# 0xF0 == LiVES-perl
<language_code>
0xF0
</language_code>

# pre loop code (list)
<pre>
$diff=$p0;
$pc_start=$p1; # fade amount
$pc_step=($p2-$p1)/$p0;
</pre>

# loop code (list)
<loop>
if (($frame+$diff>$end)||$diff==0) {
  `cp $in $out`;
}
else {
     $from=&mkname(int($frame+$diff));
     if (-f "$from$img_ext") {
    	     $fromimg="$img_prefix$from$img_ext";
    	   `$composite_command -compose plus -dissolve $pc_start $fromimg -size $width!x$height! $img_prefix$in $out_prefix$out >/dev/null 2>&1`;
	   }
	   else {
     	   	`cp $in $out`;
     		}
}
$diff--;
$pc_start+=$pc_step;
if ($diff<0) {
   $diff=$p0;
   $pc_start=$p1;
}

</loop>

# post loop code (list)
<post>
</post>

<onchange>
</onchange>