@ -13,8 +13,6 @@
namespace PrivateBin;
use PrivateBin\Persistence\ServerSalt;
/**
* Vizhash16x16
*
@ -60,14 +58,6 @@ class Vizhash16x16
*/
private $height;
/**
* salt used when generating the image
*
* @access private
* @var string
*/
private $salt;
/**
* constructor
*
@ -78,12 +68,13 @@ class Vizhash16x16
{
$this->width = 16;
$this->height = 16;
$this->salt = ServerSalt::get();
}
/**
* Generate a 16x16 png corresponding to $text.
*
* The given text should to be 128 to 150 characters long
*
* @access public
* @param string $text
* @return string PNG data. Or empty string if GD is not available.
@ -94,44 +85,35 @@ class Vizhash16x16
return '';
}
// We hash the input string.
$hash=hash('sha1', $text.$this->salt).hash('md5', $text.$this->salt);
$hash=$hash.strrev($hash); # more data to make graphics
$hashlen=strlen($hash);
$textlen=strlen($text);
// We convert the hash into an array of integers.
$this->VALUES=array();
for ($i=0; $i< $hashlen; $i=$i+ 2) {
array_push($this->VALUES, hexdec(substr($hash , $i, 2)));
$this->VALUES = array();
for ($i = 0; $i < $textlen; $i = $i + 2) {
array_push($this->VALUES, hexdec(substr($text , $i, 2)));
}
$this->VALUES_INDEX=0; // to walk the array.
$this->VALUES_INDEX = 0; // to walk the array.
// Then use these integers to drive the creation of an image.
$image = imagecreatetruecolor($this->width, $this->height);
$r0 = $this->getInt();
$r=$r0;
$g0 = $this->getInt();
$g=$g0;
$b0 = $this->getInt();
$b=$b0;
$r = $r0 = $this->getInt();
$g = $g0 = $this->getInt();
$b = $b0 = $this->getInt();
// First, create an image with a specific gradient background.
$op='v';
if (($this->getInt()%2)==0) {
$op='h';
$op = 'v';
if (($this->getInt() % 2) == 0) {
$op = 'h';
};
$image = $this->degrade($image, $op, array($r0, $g0, $b0), array(0, 0, 0));
for ($i=0; $i< 7 ; $ i = $i+1 ) {
$action=$this->getInt();
for ($i = 0; $i < 7 ; + + $ i ) {
$action = $this->getInt();
$color = imagecolorallocate($image, $r, $g, $b);
$r = ($r0 + $this->getInt()/25)%256;
$g = ($g0 + $this->getInt()/25)%256;
$b = ($b0 + $this->getInt()/25)%256;
$r0=$r;
$g0=$g;
$b0=$b;
$r = $r0 = ($r0 + $this->getInt() / 25) % 256;
$g = $g0 = ($g0 + $this->getInt() / 25) % 256;
$b = $b0 = ($b0 + $this->getInt() / 25) % 256;
$this->drawshape($image, $action, $color);
}
@ -154,8 +136,8 @@ class Vizhash16x16
*/
private function getInt()
{
$v= $this->VALUES[$this->VALUES_INDEX];
$this->VALUES_INDEX++ ;
$v = $this->VALUES[$this->VALUES_INDEX];
++ $this->VALUES_INDEX;
$this->VALUES_INDEX %= count($this->VALUES); // Warp around the array
return $v;
}
@ -168,7 +150,7 @@ class Vizhash16x16
*/
private function getX()
{
return $this->width*$this->getInt()/256;
return $this->width * $this->getInt() / 256;
}
/**
@ -179,7 +161,7 @@ class Vizhash16x16
*/
private function getY()
{
return $this->height*$this->getInt()/256;
return $this->height * $this->getInt() / 256;
}
/**
@ -197,7 +179,7 @@ class Vizhash16x16
*/
private function degrade($img, $direction, $color1, $color2)
{
if ($direction=='h') {
if ($direction == 'h') {
$size = imagesx($img);
$sizeinv = imagesy($img);
} else {
@ -205,15 +187,15 @@ class Vizhash16x16
$sizeinv = imagesx($img);
}
$diffs = array(
(($color2[0]-$color1[0])/$size),
(($color2[1]-$color1[1])/$size),
(($color2[2]-$color1[2])/$size)
);
for ($i=0;$i< $size;$i++ ) {
$r = $color1[0]+($diffs[0]*$i);
$g = $color1[1]+($diffs[1]*$i);
$b = $color1[2]+($diffs[2]*$i);
if ($direction=='h') {
(($color2[0] - $color1[0]) / $size),
(($color2[1] - $color1[1]) / $size),
(($color2[2] - $color1[2]) / $size)
);
for ($i = 0; $i < $size; ++ $i) {
$r = $color1[0] + ($diffs[0] * $i);
$g = $color1[1] + ($diffs[1] * $i);
$b = $color1[2] + ($diffs[2] * $i);
if ($direction == 'h') {
imageline($img, $i, 0, $i, $sizeinv, imagecolorallocate($img, $r, $g, $b));
} else {
imageline($img, 0, $i, $sizeinv, $i, imagecolorallocate($img, $r, $g, $b));
@ -233,7 +215,7 @@ class Vizhash16x16
*/
private function drawshape($image, $action, $color)
{
switch ($action%7) {
switch ($action % 7) {
case 0:
ImageFilledRectangle($image, $this->getX(), $this->getY(), $this->getX(), $this->getY(), $color);
break;
@ -246,7 +228,8 @@ class Vizhash16x16
ImageFilledPolygon($image, $points, 4, $color);
break;
default:
$start=$this->getInt()*360/256; $end=$start+$this->getInt()*180/256;
$start = $this->getInt() * 360 /256;
$end = $start + $this->getInt() * 180 / 256;
ImageFilledArc($image, $this->getX(), $this->getY(), $this->getX(), $this->getY(), $start, $end, $color, IMG_ARC_PIE);
}
}