<?php
class blocks {
var $block_size;
var $margin_size;
var $colors=array();
var $matrix='';
public function __construct($block_size,$margin_size,$border,$colors) {
$this->block_size=$block_size;
$this->margin_size=$margin_size;
$this->border=$border;
$this->colors=$colors;
}
public function addMatrix($str,$clear=false) {
$lines1=explode(chr(10),$this->matrix);
if((strlen($this->matrix)>0) && !$clear) {
$lines2=explode(chr(10),$str);
for($rows=0;$rows<count($lines1);$rows++) {
$lines1[$rows].=$lines2[$rows];
}
$this->matrix=implode(chr(10),$lines1);
} else {
$this->matrix=$str;
}
}
private function hexToDec($hex) {
$dec = array();
$hash = array( 'A' => 10, 'B' => 11, 'C' => 12, 'D' => 13, 'E' => 14, 'F' => 15);
for ($i = 0; $i < strlen($hex); $i++) {
if(array_key_exists(strtoupper($hex[$i]),$hash)) {
$num=$hash[strtoupper($hex[$i])];
} else {
$num=$hex[$i];
}
$dec[]=$num;
}
return $dec;
}
private function getRGB($hex) {
$decs=$this->hexToDec($hex);
for($i=0;$i<=5;$i=$i+2) {
$col[]=$decs[$i]*16+$decs[$i+1];
}
return $col;
}
private function getHEX($col) {
$hash = array( 0,1,2,3,4,5,6,7,8,9,'A', 'B', 'C', 'D', 'E', 'F');
$r=$hash[floor($col['red']/16)].$hash[($col['red']%16)];
$g=$hash[floor($col['green']/16)].$hash[($col['green']%16)];
$b=$hash[floor($col['blue']/16)].$hash[($col['blue']%16)];
return $r.$g.$b;
}
public function render($type) {
$lines=explode(chr(10),$this->matrix);
array_shift($lines);
array_pop($lines);
$height=$this->block_size*count($lines)+$this->margin_size*(count($lines)-1);
$width=$this->block_size*strlen($lines[0])+$this->margin_size*(strlen($lines[0])-1);
$left=$this->border;
$top=$this->border;
$image = imagecreatetruecolor($width+$this->border*2, $height+$this->border*2);
$c=$this->getRGB($this->colors["0"]);
$col = imagecolorallocate($image, $c[0], $c[1], $c[2]);
imagefill ($image, 0, 0, $col);
for($rows=0;$rows<count($lines);$rows++) {
for($cols=0;$cols<strlen($lines[0]);$cols++) {
$symb=$lines[$rows][$cols];
$right=$left+$this->block_size;
$bottom=$top+$this->block_size;
$c=$this->getRGB($this->colors[$symb]);
$col = imagecolorallocate($image, $c[0], $c[1], $c[2]);
imagefilledrectangle($image, $left, $top, $right, $bottom, $col);
$left+=$this->block_size+$this->margin_size;
}
$left=$this->border;
$top+=$this->block_size+$this->margin_size;
}
switch($type) {
case "png":
header("Content-type: image/png");
imagepng($image);
break;
case "gif":
header("Content-type: image/gif");
imagegif($image);
break;
case "jpg":
header("Content-type: image/jpeg");
imagejpeg($image,null,100);
break;
}
}
public function get_avg_color($im,$sl,$st,$el,$et) {
$indexes=array();
for($t=$st;$t<=$et;$t++){
for($l=$sl;$l<=$el;$l++) {
$indexes[] = imagecolorsforindex($im, imagecolorat($im, $l, $t));
}
}
$color=array_shift($indexes);
while(count($indexes)>0) {
$color['red']=floor(($color['red']+$indexes[0]['red'])/2);
$color['green']=floor(($color['green']+$indexes[0]['green'])/2);
$color['blue']=floor(($color['blue']+$indexes[0]['blue'])/2);
$color['alpha']=floor(($color['alpha']+$indexes[0]['alpha'])/2);
array_shift($indexes);
}
return $color;
}
public function get_near_color($col,$precision=10) {
$ret=false;
foreach($this->colors as $k=>$c) {
$c=$this->getRGB($c);
if((abs($c[0]-$col['red'])<=$precision) && (abs($c[1]-$col['green'])<=$precision) && (abs($c[2]-$col['blue'])<=$precision)) {
$ret=$k;break;
}
}
return $ret;
}
public function get_matrix_form_img($file,$opt) {
if(is_resource($file)) {
$im=$file;
$width_im=imagesx($im);
$height_im=imagesy($im);
} else {
if(!file_exists($file)) die("File doesn't exist!");
list($width_im, $height_im, $type_im, $attr_im) = getimagesize($file);
switch($type_im) {
case "1":
@$im = imagecreatefromgif($file);
break;
case "2":
@$im = imagecreatefromjpeg($file);
break;
case "3":
@$im = imagecreatefrompng($file);
break;
}
}
if(!$im) die('File type not recognized');
$block=$width_im/$opt["width_in_blocks"];
$work_width=$block*$opt["width_in_blocks"];
$work_height=floor($height_im/$block)*$block;
$block_h=floor($height_im/$block);
$block_w=$opt["width_in_blocks"];
$ch=30;
$matrix=chr(10);
for($t=0;$t<$block_h;$t++) {
for($l=0;$l<$block_w;$l++) {
$col=$this->get_avg_color($im,($l*$block),($t*$block),($l*$block+$block),($t*$block+$block));
$near=$this->get_near_color($col,$opt["precision_color_match"]);
if($near!==false) {
$symb=$near;
} else {
if(ord('0')==$ch) $ch++;
$this->colors[chr($ch)]=$this->getHEX($col);
$symb=chr($ch);
$ch++;
}
$matrix.=$symb;
}
$matrix.=chr(10);
}
return $matrix;
}
}
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