<?php
/*
Embroidery Reader - an application to view .pes embroidery designs

Copyright (C) 2009 Nathan Crawford
Converted from C# to php 2009 Robert Heel

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.

A copy of the full GPL 2 license can be found in the docs directory.
You can contact me at http://www.njcrawford.com/contact.php.
*/

class color {
    public $r;
    public $g;
    public $b;

    function __construct($r=0,$g=0,$b=0){
        $this->r=$r;
        $this->g=$g;
        $this->b=$b;
    }
}

class point {
    public $x;
    public $y;

    function __construct($x=0,$y=0){
        $this->x=$x;
        $this->y=$y;
    }
}

class stitchBlock {
    public $color; // color
    public $colorIndex; // int32
    public $stitchesTotal; // int32
    public $stitches; // array

    function __construct(){
        $this->color=new color();
    }
}

class PesFile {
    var $imageWidth;
    var $imageHeight;
    var $pesHeader; // int64
    var $blocks; // stitchBlock
    var $colorTable;
    var $startStitches = 0; // int64
    var $lastError = ""; // string
    var $pesNum = ""; // string
    var $min; // point

    //means we couldn't figure out some or all
    //of the colors, best guess will be used
    private $colorWarning = false; // bool
    private $formatWarning = false; // bool
    private $classWarning = false; // bool

    function PesFile($filename) {
        $this->OpenFile($filename);
    }

    function OpenFile($filename) {
        $file=fopen($filename,'r');
        if($file) {
            // 4 bytes
            $startFileSig = fread($file,4);
            if ($startFileSig!="#PES") {
                //this is not a file that we can read
                $this->lastError = "Missing #PES at beginning of file";
                fclose($file);
                return;
            }

            // 4 bytes
            fread($file,4);

            // pecstart
            $pecstart = $this->readInt32($file,4);

            // Design dimensions
            $this->imageWidth=$this->readInt16($file);
            $this->imageHeight=$this->readInt16($file);

            // Color table
            fseek($file,$pecstart+48);
            $numColors = $this->readInt8($file)+1;
            for ($x = 0; $x < $numColors; $x++) {
                $colorList[] = $this->readInt8($file);
            }

            // Stitch data
            fseek($file,$pecstart + 532);
            $thisPartIsDone = false;
            $prevX = 0;
            $prevY = 0;
            $maxX = 0;
            $minX = 0;
            $maxY = 0;
            $minY = 0;
            $colorNum = -1;
            $colorIndex = 0;
            $tempStitches = array();
            while (!$thisPartIsDone && !feof($file)) {
                $val1 = $this->readInt8($file);
                $val2 = $this->readInt8($file);
                if ($val1 == 255 && $val2 == 0) {
                    //end of stitches
                    $thisPartIsDone = true;

                    //add the last block
                    $curBlock = new stitchBlock();
                    $curBlock->stitches = $tempStitches;
                    $curBlock->stitchesTotal = count($tempStitches);
                    $colorNum++;
                    $colorIndex = $colorList[$colorNum];
                    $curBlock->colorIndex = $colorIndex;
                    $curBlock->color = $this->getColorFromIndex($colorIndex);
                    $this->blocks[]=$curBlock;
                } elseif ($val1 == 254 && $val2 == 176) {
                    //color switch, start a new block
                    $curBlock = new stitchBlock();
                    $curBlock->stitches = $tempStitches;
                    $curBlock->stitchesTotal = count($tempStitches);
                    $colorNum++;
                    $colorIndex = $colorList[$colorNum];
                    $curBlock->colorIndex = $colorIndex;
                    $curBlock->color = $this->getColorFromIndex($colorIndex);
                    $this->blocks[]=$curBlock;

                    $tempStitches = array();

                    //read useless(?) byte
                    fread($file,1);
                } else {
                    $deltaX = 0;
                    $deltaY = 0;
                    if (($val1 & 128) == 128) {//$80
                        //this is a jump stitch
                        $deltaX = (($val1 & 15) * 256) + $val2;
                        if (($deltaX & 2048) == 2048) {//$0800
                            $deltaX = $deltaX - 4096;
                        }
                        //read next byte for Y value
                        $val2 = $this->readInt8($file);
                    } else {
                        //normal stitch
                        $deltaX = $val1;
                        if ($deltaX > 63) {
                            $deltaX = $deltaX - 128;
                        }
                    }

                    if (($val2 & 128) == 128) {//$80
                        //this is a jump stitch
                        $val3 = $this->readInt8($file);
                        $deltaY = (($val2 & 15) * 256) + $val3;
                        if (($deltaY & 2048) == 2048) {
                            $deltaY = $deltaY - 4096;
                        }
                    } else {
                        //normal stitch
                        $deltaY = $val2;
                        if ($deltaY > 63) {
                            $deltaY = $deltaY - 128;
                        }
                    }

                    $prevX = $prevX + $deltaX;
                    $prevY = $prevY + $deltaY;
                    $tempStitches[]=new point($prevX, $prevY);

                    if ($prevX > $maxX) {
                        $maxX = $prevX;
                    }    elseif ($prevX < $minX)    {
                        $minX = $prevX;
                    }

                    if ($prevY > $maxY) {
                        $maxY = $prevY;
                    }    elseif ($prevY < $minY) {
                        $minY = $prevY;
                    }
                }
            }
            $this->imageWidth = $maxX - $minX;
            $this->imageHeight = $maxY - $minY;
            $this->min->x = $minX;
            $this->min->y = $minY;
        }
    }

    function readInt8($file){
        return(ord(fread($file,1)));
    }

    function readInt16($file){
        return(array_shift(unpack('v',fread($file,2))));
    }

    function readInt32($file){
        return(array_shift(unpack('V',fread($file,4))));
    }

    function getColorFromIndex($index){
        switch ($index){
            case 1:
                $color=new color(14, 31, 124);
            break;
            case 2:
                $color=new color(10, 85, 163);
            break;
            case 3:
                $color=new color(48, 135, 119);
            break;
            case 4:
                $color=new color(75, 107, 175);
            break;
            case 5:
                $color=new color(237, 23, 31);
            break;
            case 6:
                $color=new color(209, 92, 0);
            break;
            case 7:
                $color=new color(145, 54, 151);
            break;
            case 8:
                $color=new color(228, 154, 203);
            break;
            case 9:
                $color=new color(145, 95, 172);
            break;
            case 10:
                $color=new color(157, 214, 125);
            break;
            case 11:
                $color=new color(232, 169, 0);
            break;
            case 12:
                $color=new color(254, 186, 53);
            break;
            case 13:
                $color=new color(255, 255, 0);
            break;
            case 14:
                $color=new color(112, 188, 31);
            break;
            case 15:
                $color=new color(192, 148, 0);
            break;
            case 16:
                $color=new color(168, 168, 168);
            break;
            case 17:
                $color=new color(123, 111, 0);
            break;
            case 18:
                $color=new color(255, 255, 179);
            break;
            case 19:
                $color=new color(79, 85, 86);
            break;
            case 20:
                $color=new color(0, 0, 0);
            break;
            case 21:
                $color=new color(11, 61, 145);
            break;
            case 22:
                $color=new color(119, 1, 118);
            break;
            case 23:
                $color=new color(41, 49, 51);
            break;
            case 24:
                $color=new color(42, 19, 1);
            break;
            case 25:
                $color=new color(246, 74, 138);
            break;
            case 26:
                $color=new color(178, 118, 36);
            break;
            case 27:
                $color=new color(252, 187, 196);
            break;
            case 28:
                $color=new color(254, 55, 15);
            break;
            case 29:
                $color=new color(240, 240, 240);
            break;
            case 30:
                $color=new color(106, 28, 138);
            break;
            case 31:
                $color=new color(168, 221, 196);
            break;
            case 32:
                $color=new color(37, 132, 187);
            break;
            case 33:
                $color=new color(254, 179, 67);
            break;
            case 34:
                $color=new color(255, 240, 141);
            break;
            case 35:
                $color=new color(208, 166, 96);
            break;
            case 36:
                $color=new color(209, 84, 0);
            break;
            case 37:
                $color=new color(102, 186, 73);
            break;
            case 38:
                $color=new color(19, 74, 70);
            break;
            case 39:
                $color=new color(135, 135, 135);
            break;
            case 40:
                $color=new color(216, 202, 198);
            break;
            case 41:
                $color=new color(67, 86, 7);
            break;
            case 42:
                $color=new color(254, 227, 197);
            break;
            case 43:
                $color=new color(249, 147, 188);
            break;
            case 44:
                $color=new color(0, 56, 34);
            break;
            case 45:
                $color=new color(178, 175, 212);
            break;
            case 46:
                $color=new color(104, 106, 176);
            break;
            case 47:
                $color=new color(239, 227, 185);
            break;
            case 48:
                $color=new color(247, 56, 102);
            break;
            case 49:
                $color=new color(181, 76, 100);
            break;
            case 50:
                $color=new color(19, 43, 26);
            break;
            case 51:
                $color=new color(199, 1, 85);
            break;
            case 52:
                $color=new color(254, 158, 50);
            break;
            case 53:
                $color=new color(168, 222, 235);
            break;
            case 54:
                $color=new color(0, 103, 26);
            break;
            case 55:
                $color=new color(78, 41, 144);
            break;
            case 56:
                $color=new color(47, 126, 32);
            break;
            case 57:
                $color=new color(253, 217, 222);
            break;
            case 58:
                $color=new color(255, 217, 17);
            break;
            case 59:
                $color=new color(9, 91, 166);
            break;
            case 60:
                $color=new color(240, 249, 112);
            break;
            case 61:
                $color=new color(227, 243, 91);
            break;
            case 62:
                $color=new color(255, 200, 100);
            break;
            case 63:
                $color=new color(255, 200, 150);
            break;
            case 64:
                $color=new color(255, 200, 200);
            break;
            default:
                $color=new color(0, 0, 0);
                $this->colorWarning = true;
            break;
        }
        return $color;
    }
}
?>