#!/usr/bin/perl

#######################################################################
# LiVES transition_bwthresh plugin, version 1.7
# RFX version 1.8
# autogenerated from script by Salsaman|

# rendered plugins should accept:
# <plugin_name> version (return <plugin_name> version <version>)
# <plugin_name> get_define
# <plugin_name> get_capabilities
# <plugin_name> get_description (e.g. "Edge detect|Edge detecting|1|1|")
# <plugin_name> clear (clean up any plugin generated temp files)
# and optionally any of: 
# <plugin_name> get_parameters
# <plugin_name> get_param_window
# <plugin_name> get_onchange
# <plugin_name> onchange_<when> (for any triggers, e.g. onchange_init)
#
# they must accept:
# <plugin_name> process <parameters>

# You should not skip any frames, if a frame is not changed you must do:
# `cp $in $out`
#
# for *non-Perl* plugins, LiVES will call:
# <plugin_name> process "<dir>" <in_ext> <out_ext> <start> <end>
#  <width> <height> <parameters>
# first you should chdir to <dir>
# then you should create all output frames %8d$out_ext in numerical 
# from start to end inclusive,
# each time calling sig_progress (see smogrify) - writes current frame number to 
# <dir>/.status
# and checking for pause
#
# Any errors should be transmitted as in sig_error - 
# write "error|msg1|msg2|msg3|" to <dir>/.status
# msgn must not contain "\n", but can be omitted

# output frames should be named %8d$out_ext in the same directory
# after processing, you should leave no gaps in out frames, you should not resize
# or change the palette from RGB24 (LiVES will check and autocorrect this soon)

# Also you must implement your own: &sig_error and &sig_progress


#######################################################################

use POSIX;

my $command=$ARGV[0];

if ($command eq "get_capabilities") {
    # capabilities is a bitmap field
    # 0x0001 == slow (hint to GUI)
    # 0x0002 == may resize (all frames to  x )
    # 0x0004 == block mode generator
    # 0x8000 == reserved
    print "32768\n";
    exit 0;
}

if ($command eq "version") {
    print "transition_bwthresh version 1 : builder version 2.0.3\n";
    exit 0;
}

if ($command eq "get_define") {
    print "|1.7\n";
    exit 0;
}

if ($command eq "get_description") {
    #format here is "Menu entry|Action description|min_frames|number_of_in_channels|"
    # min_frames==-1 indicates a special "no processing" effect. This allows more
    #general parameter windows which are not really effects (e.g. frame_calculator)
    print "B/W Threshold|B/W thresholding|1|2|\n";
    exit 0;
}


if ($command eq "get_parameters") {
    # "name|label|type|other fields..."
    # eg. print "radius|_radius|num0|1|1|100|";
    # types can be numx,colRGB24,bool,string or string_list
    print "thresh|Thres_hold|num0|8000|0|65535|\n";
    print "btrans|_Black is transparent|bool|1|1|\n";
    print "wtrans|_White is transparent|bool|0|1|\n";
    print "cover|Clipboard _over selection|bool|1|2|\n";
    print "cunder|Clipboard _under selection|bool|0|2|\n";
    print "width|_Width|num0|0|0|10000|\n";
    print "height|_Height|num0|0|0|10000|\n";
    print "cx|Centre _X|num0|0|0|10000|\n";
    print "cy|Centre _Y|num0|0|0|10000|\n";
    print "finf|Frame _in frame position of top frame...|bool|0|\n";
    exit 0;
}

if ($command eq "get_param_window") {
    print "layout|p0|\"(0 = no transparency, 65535 = all transparent)\"||\n";
    print "layout|p1|p2||\n";
    print "layout|hseparator||\n";
    print "layout|p9||\n";
    print "layout|p5|p6||\n";
    print "layout|p7|p8||\n";
    print "layout|hseparator||\n";
    print "layout|$p3|$p4||\n";
    exit 0;
}

if ($command eq "get_onchange") {
    print "init|\n";
    print "5|\n";
    print "6|\n";
    print "9|\n";
    exit 0;
}

#######################################################

if ($command eq "process") {

# in case of error, you should do:
# &sig_error("msg1","msg2","msg3","msg4"); [ msg's are optional, but must not
# contain newlines (\n) ]

##### check requirements first #######
    if (&location("convert") eq "") {
      &sig_error("You must install 'convert' before you can use this effect.");
      exit 1;
    }
    if (&location("composite") eq "") {
      &sig_error("You must install 'composite' before you can use this effect.");
      exit 1;
    }
    if (&location("convert") eq "") {
      &sig_error("You must install 'convert' before you can use this effect.");
      exit 1;
    }

###### handle parameters #############
# autogenerated from get_parameters

    unless (defined($ARGV[1])) {
      $p0=8000;
    }
    else {
      $p0=$ARGV[1];
    }
    unless (defined($ARGV[2])) {
      $p1=1;
    }
    else {
      $p1=$ARGV[2];
    }
    unless (defined($ARGV[3])) {
      $p2=0;
    }
    else {
      $p2=$ARGV[3];
    }
    unless (defined($ARGV[4])) {
      $p3=1;
    }
    else {
      $p3=$ARGV[4];
    }
    unless (defined($ARGV[5])) {
      $p4=0;
    }
    else {
      $p4=$ARGV[5];
    }
    unless (defined($ARGV[6])) {
      $p5=0;
    }
    else {
      $p5=$ARGV[6];
    }
    unless (defined($ARGV[7])) {
      $p6=0;
    }
    else {
      $p6=$ARGV[7];
    }
    unless (defined($ARGV[8])) {
      $p7=0;
    }
    else {
      $p7=$ARGV[8];
    }
    unless (defined($ARGV[9])) {
      $p8=0;
    }
    else {
      $p8=$ARGV[9];
    }
    unless (defined($ARGV[10])) {
      $p9=0;
    }
    else {
      $p9=$ARGV[10];
    }
    $!=0;
    if ($p0>=0) {
        $p0=int(POSIX::strtod($p0)*1+.5)/1;
    } else {
        $p0=int(POSIX::strtod($p0)*1-.5)/1;
    }
    if ($p0<0) {
       &sig_error("thresh must be >= 0");
       exit 1;
    }
    if ($p0>65535) {
       &sig_error("thresh must be <= 65535");
       exit 1;
    }
    $p1=~(~$p1);
    $p2=~(~$p2);
    $p3=~(~$p3);
    $p4=~(~$p4);
    $!=0;
    if ($p5>=0) {
        $p5=int(POSIX::strtod($p5)*1+.5)/1;
    } else {
        $p5=int(POSIX::strtod($p5)*1-.5)/1;
    }
    if ($p5<0) {
       &sig_error("width must be >= 0");
       exit 1;
    }
    if ($p5>10000) {
       &sig_error("width must be <= 10000");
       exit 1;
    }
    $!=0;
    if ($p6>=0) {
        $p6=int(POSIX::strtod($p6)*1+.5)/1;
    } else {
        $p6=int(POSIX::strtod($p6)*1-.5)/1;
    }
    if ($p6<0) {
       &sig_error("height must be >= 0");
       exit 1;
    }
    if ($p6>10000) {
       &sig_error("height must be <= 10000");
       exit 1;
    }
    $!=0;
    if ($p7>=0) {
        $p7=int(POSIX::strtod($p7)*1+.5)/1;
    } else {
        $p7=int(POSIX::strtod($p7)*1-.5)/1;
    }
    if ($p7<0) {
       &sig_error("cx must be >= 0");
       exit 1;
    }
    if ($p7>10000) {
       &sig_error("cx must be <= 10000");
       exit 1;
    }
    $!=0;
    if ($p8>=0) {
        $p8=int(POSIX::strtod($p8)*1+.5)/1;
    } else {
        $p8=int(POSIX::strtod($p8)*1-.5)/1;
    }
    if ($p8<0) {
       &sig_error("cy must be >= 0");
       exit 1;
    }
    if ($p8>10000) {
       &sig_error("cy must be <= 10000");
       exit 1;
    }
    $p9=~(~$p9);
   $nwidth=$width;
$nheight=$height;

    if ($img_ext2 eq ".png") {
        $img_prefix2="PNG32:";
    } else {
        $img_prefix2="";
    }

   if ($img_ext eq ".png") {
        $img_prefix="PNG32:";
   } else {
        $img_prefix="";
   }

   if ($out_ext eq ".png") {
        $out_prefix="PNG32:";
   } else {
        $out_prefix="";
   }

    $rwidth=$width;
    $rheight=$height;
    $xoff=$yoff=0;
    
    if ($p9) {
     $rwidth=$p5;
     $rheight=$p6;
     $xoff=$p7-int($rwidth/2.+.5);
     $yoff=$p8-int($rheight/2.+.5);
    }
    

    if ($start==0) {$start = 1;}


################# loop through frames #################
   if ($img_ext eq ".png") {
        $img_prefix="PNG32:";
   } else {
        $img_prefix="";
   }

   if ($out_ext eq ".png") {
        $out_prefix="PNG32:";
   } else {
        $out_prefix="";
   }

    $frame2=$start2;
    unless (defined($img_ext2)) {
        $img_ext2=$img_ext;
    }

    if (!($img_ext2 eq $img_ext) && &location("convert") eq "") {
         &sig_error("'convert' is required by this plugin.","Please install imagemagick and try again.");
         exit 1;
    }

    if ($img_ext2 eq ".png") {
        $img_prefix2="PNG32:";
    } else {
        $img_prefix2="";
    }

    for ($frame=$start;$frame<=$end;$frame++) {
	# sig progress will update the progress bar from $start->$end
	$name=&mkname($frame);
	$in="$name$img_ext";

     if (!defined($end) || $end==0) {
         print STDERR "WARNING: generator plugin did not set $end !";
         &sig_error("Generator plugin did not set $end.");
     }
        $name2=&mkname($frame2);
        $in2="$clipboard/$name2$img_ext2";
        unless (-f $in2f) {
            # end of clipboard reached, loop back to start
            $frame2=$start2;
            $name2=&mkname($frame2);
            $in2="$clipboard/$name2$img_ext2";
	}
        unless ($img_ext2 eq $img_ext) {
            system("$convert_command $img_prefix2\"$in2\" $img_prefix\"$clipboard/$name2$img_ext\"");
            $img_prefix2=$img_prefix;
        }
	$out="$name$out_ext";

# wait for front end to create 
 while (!-f $in) {
     sleep 1;
 }

##################### the all-important bit #######################

        if ($p3) {
                        # transparent over
                	system("$convert_command +antialias $img_prefix2$in2 -scale $rwidth!x$rheight! resize.png");
                        if (!$p2) {
                            system("$convert_command resize.png -threshold $p0 -monochrome mask.png");
                        }
                        else {
                            system("$convert_command resize.png -threshold ".(65535-$p0)." -negate -monochrome mask.png");
                        }
                        system("$composite_command -compose over -geometry $rwidth!x$rheight! resize.png -geometry +$xoff!+$yoff! -size $width!x$height! $img_prefix$in mask.png $frame.tmp");
                }
                else {
                	#transparent under
                        if ($antialias eq "false") {
                            system("$convert_command +antialias $img_prefix2$in2 -scale $width!x$height! resize.png");
                        }
                        else {
                            system("$convert_command $img_prefix2$in2 -resize $width!x$height! resize.png");
                        }
                        system("$convert_command $img_prefix$in -resize $rwidth!x$rheight! resize2.png");
                        if (!$p2) {
                            system("$convert_command -threshold ".($p0)." resize2.png -monochrome mask.png");
                        }
                        else {
                            system("$convert_command -threshold ".(65535-$p0)." -negate resize2.png -monochrome mask.png");
                        }
                	system("$composite_command -compose over -geometry $rwidth!x$rheight! resize2.png -geometry +$xoff!+$yoff! -size $width!x$height! resize.png mask.png $frame.tmp");
                }
                
                system("$convert_command +matte $frame.tmp $out_prefix$out");
                unlink "$frame.tmp";

###################################################################
        unless ($img_ext2 eq $img_ext) {
            unlink $in2;
        }
        $frame2++;
        $opfailed=0;
        if (! -f $out) {
            print STDERR "Warning: effect plugin transition_bwthresh skipped frame $frame !\n";
            print STDERR "Retrying\n";
            $frame--;
            $opfailed=1;
        }
        unless ($opfailed) {
	    &sig_progress($frame);
        }
    }
    return 1;
}



########## Post loop code ############
if ($command eq "clear") {
    $start=$ARGV[1];
    $end=$ARGV[2];
    $img_ext=$ARGV[3];

    unlink <mask.png resize.png resize2.png>;
    exit 0;
}

########## Triggers ############

if ($command eq "onchange_6") {
    $p0=@ARGV[1];
    $p0_min=@ARGV[2];
    $p0_max=@ARGV[3];
    $p1=@ARGV[4];
    $p2=@ARGV[5];
    $p3=@ARGV[6];
    $p4=@ARGV[7];
    $p5=@ARGV[8];
    $p5_min=@ARGV[9];
    $p5_max=@ARGV[10];
    $p6=@ARGV[11];
    $p6_min=@ARGV[12];
    $p6_max=@ARGV[13];
    $p7=@ARGV[14];
    $p7_min=@ARGV[15];
    $p7_max=@ARGV[16];
    $p8=@ARGV[17];
    $p8_min=@ARGV[18];
    $p8_max=@ARGV[19];
    $p9=@ARGV[20];
    $width=@ARGV[21];
    $height=@ARGV[22];
    $start=@ARGV[23];
    $end=@ARGV[24];
    $last=@ARGV[25];
    $length=$end-$start+1;
    $width2=@ARGV[26];
    $height2=@ARGV[27];

    $p8_max=$height-1-int($p6/2+.5);$p8_min=int($p6/2+.5);

    print "$p0 $p0_min $p0_max $p1 $p2 $p3 $p4 $p5 $p5_min $p5_max $p6 $p6_min $p6_max $p7 $p7_min $p7_max $p8 $p8_min $p8_max $p9 ";
    exit 0;
}

if ($command eq "onchange_9") {
    $p0=@ARGV[1];
    $p0_min=@ARGV[2];
    $p0_max=@ARGV[3];
    $p1=@ARGV[4];
    $p2=@ARGV[5];
    $p3=@ARGV[6];
    $p4=@ARGV[7];
    $p5=@ARGV[8];
    $p5_min=@ARGV[9];
    $p5_max=@ARGV[10];
    $p6=@ARGV[11];
    $p6_min=@ARGV[12];
    $p6_max=@ARGV[13];
    $p7=@ARGV[14];
    $p7_min=@ARGV[15];
    $p7_max=@ARGV[16];
    $p8=@ARGV[17];
    $p8_min=@ARGV[18];
    $p8_max=@ARGV[19];
    $p9=@ARGV[20];
    $width=@ARGV[21];
    $height=@ARGV[22];
    $start=@ARGV[23];
    $end=@ARGV[24];
    $last=@ARGV[25];
    $length=$end-$start+1;
    $width2=@ARGV[26];
    $height2=@ARGV[27];

    if ($p9) {$p7_max=$width-1-int($p5/2+.5);$p7_min=int($p5/2+.5);$p8_max=$height-1-int($p6/2+.5);$p8_min=int($p6/2+.5);}

    print "$p0 $p0_min $p0_max $p1 $p2 $p3 $p4 $p5 $p5_min $p5_max $p6 $p6_min $p6_max $p7 $p7_min $p7_max $p8 $p8_min $p8_max $p9 ";
    exit 0;
}

if ($command eq "onchange_5") {
    $p0=@ARGV[1];
    $p0_min=@ARGV[2];
    $p0_max=@ARGV[3];
    $p1=@ARGV[4];
    $p2=@ARGV[5];
    $p3=@ARGV[6];
    $p4=@ARGV[7];
    $p5=@ARGV[8];
    $p5_min=@ARGV[9];
    $p5_max=@ARGV[10];
    $p6=@ARGV[11];
    $p6_min=@ARGV[12];
    $p6_max=@ARGV[13];
    $p7=@ARGV[14];
    $p7_min=@ARGV[15];
    $p7_max=@ARGV[16];
    $p8=@ARGV[17];
    $p8_min=@ARGV[18];
    $p8_max=@ARGV[19];
    $p9=@ARGV[20];
    $width=@ARGV[21];
    $height=@ARGV[22];
    $start=@ARGV[23];
    $end=@ARGV[24];
    $last=@ARGV[25];
    $length=$end-$start+1;
    $width2=@ARGV[26];
    $height2=@ARGV[27];

    $p7_max=$width-1-int($p5/2+.5);$p7_min=int($p5/2+.5);

    print "$p0 $p0_min $p0_max $p1 $p2 $p3 $p4 $p5 $p5_min $p5_max $p6 $p6_min $p6_max $p7 $p7_min $p7_max $p8 $p8_min $p8_max $p9 ";
    exit 0;
}

if ($command eq "onchange_init") {
    $p0=@ARGV[1];
    $p0_min=@ARGV[2];
    $p0_max=@ARGV[3];
    $p1=@ARGV[4];
    $p2=@ARGV[5];
    $p3=@ARGV[6];
    $p4=@ARGV[7];
    $p5=@ARGV[8];
    $p5_min=@ARGV[9];
    $p5_max=@ARGV[10];
    $p6=@ARGV[11];
    $p6_min=@ARGV[12];
    $p6_max=@ARGV[13];
    $p7=@ARGV[14];
    $p7_min=@ARGV[15];
    $p7_max=@ARGV[16];
    $p8=@ARGV[17];
    $p8_min=@ARGV[18];
    $p8_max=@ARGV[19];
    $p9=@ARGV[20];
    $width=@ARGV[21];
    $height=@ARGV[22];
    $start=@ARGV[23];
    $end=@ARGV[24];
    $last=@ARGV[25];
    $length=$end-$start+1;
    $width2=@ARGV[26];
    $height2=@ARGV[27];

    $p5=$width2; $p5_max=$width;
    $p6=$height2; $p6_max=$height;
    $p7=int($width/2+.5);
    $p8=int($height/2+.5);

    print "$p0 $p0_min $p0_max $p1 $p2 $p3 $p4 $p5 $p5_min $p5_max $p6 $p6_min $p6_max $p7 $p7_min $p7_max $p8 $p8_min $p8_max $p9 ";
    exit 0;
}
