#!/usr/bin/perl

#######################################################################
# LiVES rotate plugin, version 2
# Compiled with Builder version 3.2.0
# 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 [<in2_prefix> [<in_prefix>]] <out_prefix> <out_ext> <start> <end>
#  <width> <height> <img_ext> <fps> [<img2_ext> <start2> <handle2>]  <parameters>
# you should create all output frames $out_prefix%08d$out_ext in numerical 
# from start to end inclusive,
# using $in_prefix%08d$in_ext and $in2_prefix%08d$img2_ext as applicable.
# in / out images are in current dir, In2 images can be located in ../handle2 and numbered from 
# Each time calling sig_progress (see smogrify) - writes current frame number to 
# <dir>/.status
# and checking for pause (test for a file of that name in current dir - if present just sleep until deleted)
#
# Any errors - 
# write "error|msg1|msg2|msg3|" to .status
# msgn must not contain "\n", but can be omitted

# 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;
setlocale(LC_NUMERIC, "C");

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 "32770\n";
    exit 0;
}

if ($command eq "version") {
    print "rotate version 2 : builder version 3.2.0\n";
    exit 0;
}

if ($command eq "get_define") {
    print "|1.8.3\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 "Rotate Clip|Rotating|0|1|\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 "cw|90 degrees _Clockwise    |bool|1|1|\n";
    print "acw|90 degrees _Anticlockwise|bool|0|1|\n";
    print "180|180 _degrees             |bool|0|1|\n";
    print "deg|_degrees|num0|0|-180|180|\n";
    print "other|_Other|bool|0|1|\n";
    print "bgcol|_Background Colour|colRGB24|0|0|0|\n";
    exit 0;
}

if ($command eq "get_param_window") {
    print "layout|p0|\"(Changes frame size)\"|\n";
    print "layout|p1|\"(Changes frame size)\"|\n";
    print "layout|p2||\n";
    print "layout|p4|p3|\"(May change frame size)\"|\n";
    print "layout|hseparator||\n";
    print "layout|p5||\n";
    print "layout|\"To maintain original frame size, use the \"spin\" effect.\"|\n";
    exit 0;
}

if ($command eq "get_onchange") {
    print "3|\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("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 = 1;
    }
    else {
      $p0 = $ARGV[1];
    }
    unless (defined($ARGV[2])) {
      $p1 = 0;
    }
    else {
      $p1 = $ARGV[2];
    }
    unless (defined($ARGV[3])) {
      $p2 = 0;
    }
    else {
      $p2 = $ARGV[3];
    }
    unless (defined($ARGV[4])) {
      $p3 = 0;
    }
    else {
      $p3 = $ARGV[4];
    }
    unless (defined($ARGV[5])) {
      $p4 = 0;
    }
    else {
      $p4 = $ARGV[5];
    }
    unless (defined($ARGV[6])) {
      $p5 = 0;
    }
    else {
      $p5 = $ARGV[6];
    }
    $p0 = ~(~$p0);
    $p1 = ~(~$p1);
    $p2 = ~(~$p2);
    $! = 0;
    if ($p3 >= 0) {
        $p3 = int(POSIX::strtod($p3) * 1 + .5) / 1;
    } else {
        $p3 = int(POSIX::strtod($p3) * 1 - .5) / 1;
    }
    if ($p3 < -180) {
       &sig_error("deg must be >= -180");
       exit 1;
    }
    if ($p3 > 180) {
       &sig_error("deg must be <= 180");
       exit 1;
    }
    $p4 = ~(~$p4);
    $p5 = int($p5);
    if ($p5 > 0xFFFFFF || $p5 < 0) {
        &sig_error("Invalid colour for bgcol.");
        exit 1;
    }
    $p5_red = int($p5 / 65536);
    $p5 -= $p5_red * 65536;
    $p5_green = int($p5 / 256);
    $p5 -= $p5_green * 256;
    $p5_blue = $p5;
    if ($img_ext eq ".png") {
        $img_prefix = "PNG32:";
    } else {
        $img_prefix = "";
    }

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

    $cstring = &RGB24_to_string($p5_red, $p5_green, $p5_blue);
    $antialias = &config_get("antialias", $configfile);
    $nwidth = $width;
    $nheight = $height;
    
    if ($p0) {
        $deg = 90;
        $nheight = $width;
        $nwidth = $height;
    }
    elsif ($p1) {
        $deg = -90;
        $nheight = $width;
        $nwidth = $height;
    }
    elsif ($p2) {
        $deg = 180;
    }
    else {
        $deg = $p3;
        $nwidth = $nheight = 0;
    }
    $width = $nwidth;
    $height = $nheight;

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


################# loop through frames #################
    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.");
        }
        $out = "$name$out_ext";

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

        `flock $in true`;
##################### the all-important bit #######################

        system ("$convert_command $img_prefix$in -background $cstring -rotate $deg $out_prefix$out");
        if ($width == 0 || $height == 0) {
           $imresact = "none";
           &get_image_size($out);
           $width = $hsize;
           $height = $vsize;
        }

###################################################################
        for (my $i = 0; $i < 5; $i++) {
            if (! -s $out) {
                sleep 1;
            }
        }

        if (! -s $out) {
            print STDERR "Warning: effect plugin rotate skipped frame $frame !\n";
            return 1;
        }

        &sig_progress($frame);

        if ($p5_red > 255) {
            $p5_red = 255;
        }
        elsif ($p5_red < 0) {
            $p5_red = 0;
        }
        if ($p5_green > 255) {
            $p5_green = 255;
        }
        elsif ($p5_green < 0) {
            $p5_green = 0;
        }
        if ($p5_blue > 255) {
            $p5_blue = 255;
        }
        elsif ($p5_blue < 0) {
            $p5_blue = 0;
        }
        }
    return 1;
}



########## Post loop code ############
if ($command eq "clear") {
    exit 0;
}

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

if ($command eq "onchange_3") {
    $p0 = @ARGV[1];
    $p1 = @ARGV[2];
    $p2 = @ARGV[3];
    $p3 = @ARGV[4];
    $p3_min = @ARGV[5];
    $p3_max = @ARGV[6];
    $p4 = @ARGV[7];
    $p5_red = @ARGV[8];
    $p5_green = @ARGV[9];
    $p5_blue = @ARGV[10];
    $width = @ARGV[11];
    $height = @ARGV[12];
    $start = @ARGV[13];
    $end = @ARGV[14];
    $last = @ARGV[15];
    $length = $end - $start + 1;

    $p4=1;

    print "$p0 $p1 $p2 $p3 $p3_min $p3_max $p4 $p5_red $p5_green $p5_blue ";
    exit 0;
}
