mirror of
https://github.com/alextselegidis/easyappointments.git
synced 2024-11-21 23:42:21 +03:00
PHP 8.1 support (#1209)
This commit is contained in:
Alex Tselegidis
parent
a2b14ac93b
commit
aeee91f4ed
2 changed files with 819 additions and 4 deletions
|
|
@ -17,15 +17,24 @@
|
|||
* @package Controllers
|
||||
*/
|
||||
class Captcha extends EA_Controller {
|
||||
/**
|
||||
* Class Constructor
|
||||
*/
|
||||
public function __construct()
|
||||
{
|
||||
parent::__construct();
|
||||
|
||||
$this->load->library('captcha_builder');
|
||||
}
|
||||
|
||||
/**
|
||||
* Make a request to this method to get a captcha image.
|
||||
*/
|
||||
public function index()
|
||||
{
|
||||
header('Content-type: image/jpeg');
|
||||
$builder = new Gregwar\Captcha\CaptchaBuilder;
|
||||
$builder->build();
|
||||
$this->session->set_userdata('captcha_phrase', $builder->getPhrase());
|
||||
$builder->output();
|
||||
$this->captcha_builder->build();
|
||||
$this->session->set_userdata('captcha_phrase', $this->captcha_builder->getPhrase());
|
||||
$this->captcha_builder->output();
|
||||
}
|
||||
}
|
||||
|
|
|
|||
806
application/libraries/Captcha_builder.php
Normal file
806
application/libraries/Captcha_builder.php
Normal file
|
|
@ -0,0 +1,806 @@
|
|||
<?php defined('BASEPATH') or exit('No direct script access allowed');
|
||||
|
||||
/* ----------------------------------------------------------------------------
|
||||
* Easy!Appointments - Open Source Web Scheduler
|
||||
*
|
||||
* @package EasyAppointments
|
||||
* @author A.Tselegidis <alextselegidis@gmail.com>
|
||||
* @copyright Copyright (c) 2013 - 2020, Alex Tselegidis
|
||||
* @license http://opensource.org/licenses/GPL-3.0 - GPLv3
|
||||
* @link http://easyappointments.org
|
||||
* @since v1.4.3
|
||||
* ---------------------------------------------------------------------------- */
|
||||
|
||||
use Gregwar\Captcha\PhraseBuilder;
|
||||
use Gregwar\Captcha\PhraseBuilderInterface;
|
||||
|
||||
/**
|
||||
* Class Captcha_builder
|
||||
*
|
||||
* This class replaces the Gregwar\Captcha\CaptchaBuilder so that it becomes PHP 8.1 compatible.
|
||||
*/
|
||||
class Captcha_builder {
|
||||
/**
|
||||
* @var array
|
||||
*/
|
||||
protected $fingerprint = [];
|
||||
|
||||
/**
|
||||
* @var bool
|
||||
*/
|
||||
protected $useFingerprint = FALSE;
|
||||
|
||||
/**
|
||||
* @var array
|
||||
*/
|
||||
protected $textColor = [];
|
||||
|
||||
/**
|
||||
* @var array
|
||||
*/
|
||||
protected $lineColor = NULL;
|
||||
|
||||
/**
|
||||
* @var array
|
||||
*/
|
||||
protected $backgroundColor = NULL;
|
||||
|
||||
/**
|
||||
* @var array
|
||||
*/
|
||||
protected $backgroundImages = [];
|
||||
|
||||
/**
|
||||
* @var resource
|
||||
*/
|
||||
protected $contents = NULL;
|
||||
|
||||
/**
|
||||
* @var string
|
||||
*/
|
||||
protected $phrase = NULL;
|
||||
|
||||
/**
|
||||
* @var PhraseBuilderInterface
|
||||
*/
|
||||
protected $builder;
|
||||
|
||||
/**
|
||||
* @var bool
|
||||
*/
|
||||
protected $distortion = TRUE;
|
||||
|
||||
/**
|
||||
* The maximum number of lines to draw in front of
|
||||
* the image. null - use default algorithm
|
||||
*/
|
||||
protected $maxFrontLines = NULL;
|
||||
|
||||
/**
|
||||
* The maximum number of lines to draw behind
|
||||
* the image. null - use default algorithm
|
||||
*/
|
||||
protected $maxBehindLines = NULL;
|
||||
|
||||
/**
|
||||
* The maximum angle of char
|
||||
*/
|
||||
protected $maxAngle = 8;
|
||||
|
||||
/**
|
||||
* The maximum offset of char
|
||||
*/
|
||||
protected $maxOffset = 5;
|
||||
|
||||
/**
|
||||
* Is the interpolation enabled ?
|
||||
*
|
||||
* @var bool
|
||||
*/
|
||||
protected $interpolation = TRUE;
|
||||
|
||||
/**
|
||||
* Ignore all effects
|
||||
*
|
||||
* @var bool
|
||||
*/
|
||||
protected $ignoreAllEffects = FALSE;
|
||||
|
||||
/**
|
||||
* Allowed image types for the background images
|
||||
*
|
||||
* @var array
|
||||
*/
|
||||
protected $allowedBackgroundImageTypes = ['image/png', 'image/jpeg', 'image/gif'];
|
||||
|
||||
/**
|
||||
* The image contents
|
||||
*/
|
||||
public function getContents()
|
||||
{
|
||||
return $this->contents;
|
||||
}
|
||||
|
||||
/**
|
||||
* Enable/Disables the interpolation
|
||||
*
|
||||
* @param $interpolate bool True to enable, false to disable
|
||||
*
|
||||
* @return Captcha_builder
|
||||
*/
|
||||
public function setInterpolation($interpolate = TRUE)
|
||||
{
|
||||
$this->interpolation = $interpolate;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Temporary dir, for OCR check
|
||||
*/
|
||||
public $tempDir = 'temp/';
|
||||
|
||||
public function __construct($phrase = NULL, PhraseBuilderInterface $builder = NULL)
|
||||
{
|
||||
if ($builder === NULL)
|
||||
{
|
||||
$this->builder = new PhraseBuilder;
|
||||
}
|
||||
else
|
||||
{
|
||||
$this->builder = $builder;
|
||||
}
|
||||
|
||||
$this->phrase = is_string($phrase) ? $phrase : $this->builder->build($phrase);
|
||||
}
|
||||
|
||||
/**
|
||||
* Setting the phrase
|
||||
*/
|
||||
public function setPhrase($phrase)
|
||||
{
|
||||
$this->phrase = (string)$phrase;
|
||||
}
|
||||
|
||||
/**
|
||||
* Enables/disable distortion
|
||||
*/
|
||||
public function setDistortion($distortion)
|
||||
{
|
||||
$this->distortion = (bool)$distortion;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
public function setMaxBehindLines($maxBehindLines)
|
||||
{
|
||||
$this->maxBehindLines = $maxBehindLines;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
public function setMaxFrontLines($maxFrontLines)
|
||||
{
|
||||
$this->maxFrontLines = $maxFrontLines;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
public function setMaxAngle($maxAngle)
|
||||
{
|
||||
$this->maxAngle = $maxAngle;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
public function setMaxOffset($maxOffset)
|
||||
{
|
||||
$this->maxOffset = $maxOffset;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the captcha phrase
|
||||
*/
|
||||
public function getPhrase()
|
||||
{
|
||||
return $this->phrase;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns true if the given phrase is good
|
||||
*/
|
||||
public function testPhrase($phrase)
|
||||
{
|
||||
return ($this->builder->niceize($phrase) == $this->builder->niceize($this->getPhrase()));
|
||||
}
|
||||
|
||||
/**
|
||||
* Instantiation
|
||||
*/
|
||||
public static function create($phrase = NULL)
|
||||
{
|
||||
return new self($phrase);
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the text color to use
|
||||
*/
|
||||
public function setTextColor($r, $g, $b)
|
||||
{
|
||||
$this->textColor = [$r, $g, $b];
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the background color to use
|
||||
*/
|
||||
public function setBackgroundColor($r, $g, $b)
|
||||
{
|
||||
$this->backgroundColor = [$r, $g, $b];
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
public function setLineColor($r, $g, $b)
|
||||
{
|
||||
$this->lineColor = [$r, $g, $b];
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the ignoreAllEffects value
|
||||
*
|
||||
* @param bool $ignoreAllEffects
|
||||
* @return Captcha_builder
|
||||
*/
|
||||
public function setIgnoreAllEffects($ignoreAllEffects)
|
||||
{
|
||||
$this->ignoreAllEffects = $ignoreAllEffects;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the list of background images to use (one image is randomly selected)
|
||||
*/
|
||||
public function setBackgroundImages(array $backgroundImages)
|
||||
{
|
||||
$this->backgroundImages = $backgroundImages;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Draw lines over the image
|
||||
*/
|
||||
protected function drawLine($image, $width, $height, $tcol = NULL)
|
||||
{
|
||||
if ($this->lineColor === NULL)
|
||||
{
|
||||
$red = $this->rand(100, 255);
|
||||
$green = $this->rand(100, 255);
|
||||
$blue = $this->rand(100, 255);
|
||||
}
|
||||
else
|
||||
{
|
||||
$red = $this->lineColor[0];
|
||||
$green = $this->lineColor[1];
|
||||
$blue = $this->lineColor[2];
|
||||
}
|
||||
|
||||
if ($tcol === NULL)
|
||||
{
|
||||
$tcol = imagecolorallocate($image, $red, $green, $blue);
|
||||
}
|
||||
|
||||
if ($this->rand(0, 1))
|
||||
{ // Horizontal
|
||||
$Xa = $this->rand(0, $width / 2);
|
||||
$Ya = $this->rand(0, $height);
|
||||
$Xb = $this->rand($width / 2, $width);
|
||||
$Yb = $this->rand(0, $height);
|
||||
}
|
||||
else
|
||||
{ // Vertical
|
||||
$Xa = $this->rand(0, $width);
|
||||
$Ya = $this->rand(0, $height / 2);
|
||||
$Xb = $this->rand(0, $width);
|
||||
$Yb = $this->rand($height / 2, $height);
|
||||
}
|
||||
imagesetthickness($image, $this->rand(1, 3));
|
||||
imageline($image, $Xa, $Ya, $Xb, $Yb, $tcol);
|
||||
}
|
||||
|
||||
/**
|
||||
* Apply some post effects
|
||||
*/
|
||||
protected function postEffect($image)
|
||||
{
|
||||
if ( ! function_exists('imagefilter'))
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
if ($this->backgroundColor != NULL || $this->textColor != NULL)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
// Negate ?
|
||||
if ($this->rand(0, 1) == 0)
|
||||
{
|
||||
imagefilter($image, IMG_FILTER_NEGATE);
|
||||
}
|
||||
|
||||
// Edge ?
|
||||
if ($this->rand(0, 10) == 0)
|
||||
{
|
||||
imagefilter($image, IMG_FILTER_EDGEDETECT);
|
||||
}
|
||||
|
||||
// Contrast
|
||||
imagefilter($image, IMG_FILTER_CONTRAST, $this->rand(-50, 10));
|
||||
|
||||
// Colorize
|
||||
if ($this->rand(0, 5) == 0)
|
||||
{
|
||||
imagefilter($image, IMG_FILTER_COLORIZE, $this->rand(-80, 50), $this->rand(-80, 50), $this->rand(-80, 50));
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Writes the phrase on the image
|
||||
*/
|
||||
protected function writePhrase($image, $phrase, $font, $width, $height)
|
||||
{
|
||||
$length = mb_strlen($phrase);
|
||||
if ($length === 0)
|
||||
{
|
||||
return \imagecolorallocate($image, 0, 0, 0);
|
||||
}
|
||||
|
||||
// Gets the text size and start position
|
||||
$size = (int)round($width / $length) - $this->rand(0, 3) - 1;
|
||||
$box = \imagettfbbox($size, 0, $font, $phrase);
|
||||
$textWidth = $box[2] - $box[0];
|
||||
$textHeight = $box[1] - $box[7];
|
||||
$x = (int)round(($width - $textWidth) / 2);
|
||||
$y = (int)round(($height - $textHeight) / 2) + $size;
|
||||
|
||||
if ( ! $this->textColor)
|
||||
{
|
||||
$textColor = [$this->rand(0, 150), $this->rand(0, 150), $this->rand(0, 150)];
|
||||
}
|
||||
else
|
||||
{
|
||||
$textColor = $this->textColor;
|
||||
}
|
||||
$col = \imagecolorallocate($image, $textColor[0], $textColor[1], $textColor[2]);
|
||||
|
||||
// Write the letters one by one, with random angle
|
||||
for ($i = 0; $i < $length; $i++)
|
||||
{
|
||||
$symbol = mb_substr($phrase, $i, 1);
|
||||
$box = \imagettfbbox($size, 0, $font, $symbol);
|
||||
$w = $box[2] - $box[0];
|
||||
$angle = $this->rand(-$this->maxAngle, $this->maxAngle);
|
||||
$offset = $this->rand(-$this->maxOffset, $this->maxOffset);
|
||||
\imagettftext($image, $size, $angle, $x, $y + $offset, $col, $font, $symbol);
|
||||
$x += $w;
|
||||
}
|
||||
|
||||
return $col;
|
||||
}
|
||||
|
||||
/**
|
||||
* Try to read the code against an OCR
|
||||
*/
|
||||
public function isOCRReadable()
|
||||
{
|
||||
if ( ! is_dir($this->tempDir))
|
||||
{
|
||||
@mkdir($this->tempDir, 0755, TRUE);
|
||||
}
|
||||
|
||||
$tempj = $this->tempDir . uniqid('captcha', TRUE) . '.jpg';
|
||||
$tempp = $this->tempDir . uniqid('captcha', TRUE) . '.pgm';
|
||||
|
||||
$this->save($tempj);
|
||||
shell_exec("convert $tempj $tempp");
|
||||
$value = trim(strtolower(shell_exec("ocrad $tempp")));
|
||||
|
||||
@unlink($tempj);
|
||||
@unlink($tempp);
|
||||
|
||||
return $this->testPhrase($value);
|
||||
}
|
||||
|
||||
/**
|
||||
* Builds while the code is readable against an OCR
|
||||
*/
|
||||
public function buildAgainstOCR($width = 150, $height = 40, $font = NULL, $fingerprint = NULL)
|
||||
{
|
||||
do
|
||||
{
|
||||
$this->build($width, $height, $font, $fingerprint);
|
||||
}
|
||||
while ($this->isOCRReadable());
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate the image
|
||||
*/
|
||||
public function build($width = 150, $height = 40, $font = NULL, $fingerprint = NULL)
|
||||
{
|
||||
if (NULL !== $fingerprint)
|
||||
{
|
||||
$this->fingerprint = $fingerprint;
|
||||
$this->useFingerprint = TRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
$this->fingerprint = [];
|
||||
$this->useFingerprint = FALSE;
|
||||
}
|
||||
|
||||
if ($font === NULL)
|
||||
{
|
||||
$font = __DIR__ . '/../../vendor/gregwar/captcha/src/Gregwar/Captcha/Font/captcha' . $this->rand(0, 5) . '.ttf';
|
||||
}
|
||||
|
||||
if (empty($this->backgroundImages))
|
||||
{
|
||||
// if background images list is not set, use a color fill as a background
|
||||
$image = imagecreatetruecolor($width, $height);
|
||||
if ($this->backgroundColor == NULL)
|
||||
{
|
||||
$bg = imagecolorallocate($image, $this->rand(200, 255), $this->rand(200, 255), $this->rand(200, 255));
|
||||
}
|
||||
else
|
||||
{
|
||||
$color = $this->backgroundColor;
|
||||
$bg = imagecolorallocate($image, $color[0], $color[1], $color[2]);
|
||||
}
|
||||
$this->background = $bg;
|
||||
imagefill($image, 0, 0, $bg);
|
||||
}
|
||||
else
|
||||
{
|
||||
// use a random background image
|
||||
$randomBackgroundImage = $this->backgroundImages[rand(0, count($this->backgroundImages) - 1)];
|
||||
|
||||
$imageType = $this->validateBackgroundImage($randomBackgroundImage);
|
||||
|
||||
$image = $this->createBackgroundImageFromType($randomBackgroundImage, $imageType);
|
||||
}
|
||||
|
||||
// Apply effects
|
||||
if ( ! $this->ignoreAllEffects)
|
||||
{
|
||||
$square = $width * $height;
|
||||
$effects = $this->rand($square / 3000, $square / 2000);
|
||||
|
||||
// set the maximum number of lines to draw in front of the text
|
||||
if ($this->maxBehindLines != NULL && $this->maxBehindLines > 0)
|
||||
{
|
||||
$effects = min($this->maxBehindLines, $effects);
|
||||
}
|
||||
|
||||
if ($this->maxBehindLines !== 0)
|
||||
{
|
||||
for ($e = 0; $e < $effects; $e++)
|
||||
{
|
||||
$this->drawLine($image, $width, $height);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Write CAPTCHA text
|
||||
$color = $this->writePhrase($image, $this->phrase, $font, $width, $height);
|
||||
|
||||
// Apply effects
|
||||
if ( ! $this->ignoreAllEffects)
|
||||
{
|
||||
$square = $width * $height;
|
||||
$effects = $this->rand($square / 3000, $square / 2000);
|
||||
|
||||
// set the maximum number of lines to draw in front of the text
|
||||
if ($this->maxFrontLines != NULL && $this->maxFrontLines > 0)
|
||||
{
|
||||
$effects = min($this->maxFrontLines, $effects);
|
||||
}
|
||||
|
||||
if ($this->maxFrontLines !== 0)
|
||||
{
|
||||
for ($e = 0; $e < $effects; $e++)
|
||||
{
|
||||
$this->drawLine($image, $width, $height, $color);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Distort the image
|
||||
if ($this->distortion && ! $this->ignoreAllEffects)
|
||||
{
|
||||
$image = $this->distort($image, $width, $height, $bg);
|
||||
}
|
||||
|
||||
// Post effects
|
||||
if ( ! $this->ignoreAllEffects)
|
||||
{
|
||||
$this->postEffect($image);
|
||||
}
|
||||
|
||||
$this->contents = $image;
|
||||
|
||||
return $this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Distorts the image
|
||||
*/
|
||||
public function distort($image, $width, $height, $bg)
|
||||
{
|
||||
$contents = imagecreatetruecolor($width, $height);
|
||||
$X = $this->rand(0, $width);
|
||||
$Y = $this->rand(0, $height);
|
||||
$phase = $this->rand(0, 10);
|
||||
$scale = 1.1 + $this->rand(0, 10000) / 30000;
|
||||
for ($x = 0; $x < $width; $x++)
|
||||
{
|
||||
for ($y = 0; $y < $height; $y++)
|
||||
{
|
||||
$Vx = $x - $X;
|
||||
$Vy = $y - $Y;
|
||||
$Vn = sqrt($Vx * $Vx + $Vy * $Vy);
|
||||
|
||||
if ($Vn != 0)
|
||||
{
|
||||
$Vn2 = $Vn + 4 * sin($Vn / 30);
|
||||
$nX = $X + ($Vx * $Vn2 / $Vn);
|
||||
$nY = $Y + ($Vy * $Vn2 / $Vn);
|
||||
}
|
||||
else
|
||||
{
|
||||
$nX = $X;
|
||||
$nY = $Y;
|
||||
}
|
||||
$nY = $nY + $scale * sin($phase + $nX * 0.2);
|
||||
|
||||
if ($this->interpolation)
|
||||
{
|
||||
$p = $this->interpolate(
|
||||
$nX - floor($nX),
|
||||
$nY - floor($nY),
|
||||
$this->getCol($image, floor($nX), floor($nY), $bg),
|
||||
$this->getCol($image, ceil($nX), floor($nY), $bg),
|
||||
$this->getCol($image, floor($nX), ceil($nY), $bg),
|
||||
$this->getCol($image, ceil($nX), ceil($nY), $bg)
|
||||
);
|
||||
}
|
||||
else
|
||||
{
|
||||
$p = $this->getCol($image, round($nX), round($nY), $bg);
|
||||
}
|
||||
|
||||
if ($p == 0)
|
||||
{
|
||||
$p = $bg;
|
||||
}
|
||||
|
||||
imagesetpixel($contents, $x, $y, $p);
|
||||
}
|
||||
}
|
||||
|
||||
return $contents;
|
||||
}
|
||||
|
||||
/**
|
||||
* Saves the Captcha to a jpeg file
|
||||
*/
|
||||
public function save($filename, $quality = 90)
|
||||
{
|
||||
imagejpeg($this->contents, $filename, $quality);
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the image GD
|
||||
*/
|
||||
public function getGd()
|
||||
{
|
||||
return $this->contents;
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the image contents
|
||||
*/
|
||||
public function get($quality = 90)
|
||||
{
|
||||
ob_start();
|
||||
$this->output($quality);
|
||||
|
||||
return ob_get_clean();
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the HTML inline base64
|
||||
*/
|
||||
public function inline($quality = 90)
|
||||
{
|
||||
return 'data:image/jpeg;base64,' . base64_encode($this->get($quality));
|
||||
}
|
||||
|
||||
/**
|
||||
* Outputs the image
|
||||
*/
|
||||
public function output($quality = 90)
|
||||
{
|
||||
imagejpeg($this->contents, NULL, $quality);
|
||||
}
|
||||
|
||||
/**
|
||||
* @return array
|
||||
*/
|
||||
public function getFingerprint()
|
||||
{
|
||||
return $this->fingerprint;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a random number or the next number in the
|
||||
* fingerprint
|
||||
*/
|
||||
protected function rand($min, $max)
|
||||
{
|
||||
if ( ! is_array($this->fingerprint))
|
||||
{
|
||||
$this->fingerprint = [];
|
||||
}
|
||||
|
||||
if ($this->useFingerprint)
|
||||
{
|
||||
$value = current($this->fingerprint);
|
||||
next($this->fingerprint);
|
||||
}
|
||||
else
|
||||
{
|
||||
$value = mt_rand((int)$min, (int)$max);
|
||||
$this->fingerprint[] = $value;
|
||||
}
|
||||
|
||||
return $value;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param $x
|
||||
* @param $y
|
||||
* @param $nw
|
||||
* @param $ne
|
||||
* @param $sw
|
||||
* @param $se
|
||||
*
|
||||
* @return int
|
||||
*/
|
||||
protected function interpolate($x, $y, $nw, $ne, $sw, $se)
|
||||
{
|
||||
[$r0, $g0, $b0] = $this->getRGB($nw);
|
||||
[$r1, $g1, $b1] = $this->getRGB($ne);
|
||||
[$r2, $g2, $b2] = $this->getRGB($sw);
|
||||
[$r3, $g3, $b3] = $this->getRGB($se);
|
||||
|
||||
$cx = 1.0 - $x;
|
||||
$cy = 1.0 - $y;
|
||||
|
||||
$m0 = $cx * $r0 + $x * $r1;
|
||||
$m1 = $cx * $r2 + $x * $r3;
|
||||
$r = (int)($cy * $m0 + $y * $m1);
|
||||
|
||||
$m0 = $cx * $g0 + $x * $g1;
|
||||
$m1 = $cx * $g2 + $x * $g3;
|
||||
$g = (int)($cy * $m0 + $y * $m1);
|
||||
|
||||
$m0 = $cx * $b0 + $x * $b1;
|
||||
$m1 = $cx * $b2 + $x * $b3;
|
||||
$b = (int)($cy * $m0 + $y * $m1);
|
||||
|
||||
return ($r << 16) | ($g << 8) | $b;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param $image
|
||||
* @param $x
|
||||
* @param $y
|
||||
*
|
||||
* @return int
|
||||
*/
|
||||
protected function getCol($image, $x, $y, $background)
|
||||
{
|
||||
$L = imagesx($image);
|
||||
$H = imagesy($image);
|
||||
if ($x < 0 || $x >= $L || $y < 0 || $y >= $H)
|
||||
{
|
||||
return $background;
|
||||
}
|
||||
|
||||
return imagecolorat($image, $x, $y);
|
||||
}
|
||||
|
||||
/**
|
||||
* @param $col
|
||||
*
|
||||
* @return array
|
||||
*/
|
||||
protected function getRGB($col)
|
||||
{
|
||||
return [
|
||||
(int)($col >> 16) & 0xff,
|
||||
(int)($col >> 8) & 0xff,
|
||||
(int)($col) & 0xff,
|
||||
];
|
||||
}
|
||||
|
||||
/**
|
||||
* Validate the background image path. Return the image type if valid
|
||||
*
|
||||
* @param string $backgroundImage
|
||||
* @return string
|
||||
* @throws Exception
|
||||
*/
|
||||
protected function validateBackgroundImage($backgroundImage)
|
||||
{
|
||||
// check if file exists
|
||||
if ( ! file_exists($backgroundImage))
|
||||
{
|
||||
$backgroundImageExploded = explode('/', $backgroundImage);
|
||||
$imageFileName = count($backgroundImageExploded) > 1 ? $backgroundImageExploded[count($backgroundImageExploded) - 1] : $backgroundImage;
|
||||
|
||||
throw new Exception('Invalid background image: ' . $imageFileName);
|
||||
}
|
||||
|
||||
// check image type
|
||||
$finfo = finfo_open(FILEINFO_MIME_TYPE); // return mime type ala mimetype extension
|
||||
$imageType = finfo_file($finfo, $backgroundImage);
|
||||
finfo_close($finfo);
|
||||
|
||||
if ( ! in_array($imageType, $this->allowedBackgroundImageTypes))
|
||||
{
|
||||
throw new Exception('Invalid background image type! Allowed types are: ' . join(', ', $this->allowedBackgroundImageTypes));
|
||||
}
|
||||
|
||||
return $imageType;
|
||||
}
|
||||
|
||||
/**
|
||||
* Create background image from type
|
||||
*
|
||||
* @param string $backgroundImage
|
||||
* @param string $imageType
|
||||
* @return resource
|
||||
* @throws Exception
|
||||
*/
|
||||
protected function createBackgroundImageFromType($backgroundImage, $imageType)
|
||||
{
|
||||
switch ($imageType)
|
||||
{
|
||||
case 'image/jpeg':
|
||||
$image = imagecreatefromjpeg($backgroundImage);
|
||||
break;
|
||||
case 'image/png':
|
||||
$image = imagecreatefrompng($backgroundImage);
|
||||
break;
|
||||
case 'image/gif':
|
||||
$image = imagecreatefromgif($backgroundImage);
|
||||
break;
|
||||
|
||||
default:
|
||||
throw new Exception('Not supported file type for background image!');
|
||||
break;
|
||||
}
|
||||
|
||||
return $image;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue