354 lines
12 KiB
PHP
354 lines
12 KiB
PHP
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<?php
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/** This file is part of KCFinder project
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*
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* @desc GD image driver class
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* @package KCFinder
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* @version 3.12
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* @author Pavel Tzonkov <sunhater@sunhater.com>
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* @copyright 2010-2014 KCFinder Project
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* @license http://opensource.org/licenses/GPL-3.0 GPLv3
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* @license http://opensource.org/licenses/LGPL-3.0 LGPLv3
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* @link http://kcfinder.sunhater.com
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*/
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namespace kcfinder;
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class image_gd extends image {
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// ABSTRACT PUBLIC METHODS
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public function resize($width, $height) {
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if (!$width) $width = 1;
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if (!$height) $height = 1;
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return (
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(false !== ($img = new image_gd(array($width, $height)))) &&
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$img->imageCopyResampled($this) &&
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(false !== ($this->image = $img->image)) &&
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(false !== ($this->width = $img->width)) &&
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(false !== ($this->height = $img->height))
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);
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}
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public function resizeFit($width, $height, $background=false) {
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if ((!$width && !$height) || (($width == $this->width) && ($height == $this->height)))
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return true;
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if (!$width || (($height / $width) < ($this->height / $this->width))) {
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$h = $height;
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$w = round(($this->width * $h) / $this->height);
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} elseif (!$height || (($width / $height) < ($this->width / $this->height))) {
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$w = $width;
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$h = round(($this->height * $w) / $this->width);
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} else {
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$w = $width;
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$h = $height;
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}
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if (!$w) $w = 1;
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if (!$h) $h = 1;
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if ($background === false)
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return $this->resize($w, $h);
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else {
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$img = new image_gd(array($width, $height));
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$x = round(($width - $w) / 2);
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$y = round(($height - $h) / 2);
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if ((false === $this->resize($w, $h)) ||
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(false === $img->imageFilledRectangle(0, 0, $width, $height, $background)) ||
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(false === $img->imageCopyResampled($this->image, $x, $y, 0, 0, $w, $h))
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)
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return false;
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$this->image = $img->image;
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$this->width = $width;
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$this->height = $height;
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return true;
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}
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}
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public function resizeCrop($width, $height, $offset=false) {
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if (($this->width / $this->height) > ($width / $height)) {
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$h = $height;
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$w = ($this->width * $h) / $this->height;
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$y = 0;
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if ($offset !== false) {
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if ($offset > 0)
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$offset = -$offset;
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if (($w + $offset) <= $width)
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$offset = $width - $w;
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$x = $offset;
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} else
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$x = ($width - $w) / 2;
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} else {
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$w = $width;
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$h = ($this->height * $w) / $this->width;
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$x = 0;
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if ($offset !== false) {
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if ($offset > 0)
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$offset = -$offset;
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if (($h + $offset) <= $height)
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$offset = $height - $h;
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$y = $offset;
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} else
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$y = ($height - $h) / 2;
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}
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$x = round($x);
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$y = round($y);
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$w = round($w);
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$h = round($h);
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if (!$w) $w = 1;
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if (!$h) $h = 1;
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$return = (
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(false !== ($img = new image_gd(array($width, $height))))) &&
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(false !== ($img->imageCopyResampled($this->image, $x, $y, 0, 0, $w, $h))
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);
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if ($return) {
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$this->image = $img->image;
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$this->width = $w;
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$this->height = $h;
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}
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return $return;
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}
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public function rotate($angle, $background="#000000") {
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$angle = -$angle;
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$img = @imagerotate($this->image, $angle, $this->gdColor($background));
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if ($img === false)
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return false;
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$this->width = imagesx($img);
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$this->height = imagesy($img);
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$this->image = $img;
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return true;
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}
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public function flipHorizontal() {
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$img = imagecreatetruecolor($this->width, $this->height);
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if (imagecopyresampled($img, $this->image, 0, 0, ($this->width - 1), 0, $this->width, $this->height, -$this->width, $this->height))
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$this->image = $img;
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else
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return false;
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return true;
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}
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public function flipVertical() {
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$img = imagecreatetruecolor($this->width, $this->height);
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if (imagecopyresampled($img, $this->image, 0, 0, 0, ($this->height - 1), $this->width, $this->height, $this->width, -$this->height))
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$this->image = $img;
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else
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return false;
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return true;
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}
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public function watermark($file, $left=false, $top=false) {
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$info = getimagesize($file);
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list($w, $h, $t) = $info;
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if (!in_array($t, array(IMAGETYPE_PNG, IMAGETYPE_GIF)))
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return false;
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$imagecreate = ($t == IMAGETYPE_PNG) ? "imagecreatefrompng" : "imagecreatefromgif";
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if (!@imagealphablending($this->image, true) ||
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(false === ($wm = @$imagecreate($file)))
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)
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return false;
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$w = imagesx($wm);
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$h = imagesy($wm);
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$x =
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($left === true) ? 0 : (
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($left === null) ? round(($this->width - $w) / 2) : (
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(($left === false) || !preg_match('/^\d+$/', $left)) ? ($this->width - $w) : $left));
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$y =
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($top === true) ? 0 : (
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($top === null) ? round(($this->height - $h) / 2) : (
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(($top === false) || !preg_match('/^\d+$/', $top)) ? ($this->height - $h) : $top));
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if ((($x + $w) > $this->width) ||
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(($y + $h) > $this->height) ||
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($x < 0) || ($y < 0)
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)
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return false;
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if (($wm === false) || !@imagecopy($this->image, $wm, $x, $y, 0, 0, $w, $h))
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return false;
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@imagealphablending($this->image, false);
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@imagesavealpha($this->image, true);
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return true;
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}
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public function output($type='jpeg', array $options=array()) {
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$method = "output_$type";
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if (!method_exists($this, $method))
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return false;
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return $this->$method($options);
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}
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// ABSTRACT PROTECTED METHODS
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protected function getBlankImage($width, $height) {
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$image = imagecreatetruecolor($width, $height);
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imagealphablending($image, false);
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imagesavealpha($image, true);
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return $image;
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}
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protected function getImage($image, &$width, &$height) {
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if (is_resource($image) && (get_resource_type($image) == "gd")) {
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$width = @imagesx($image);
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$height = @imagesy($image);
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imagealphablending($image, false);
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imagesavealpha($image, true);
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return $image;
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} elseif (is_string($image) &&
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(false !== (list($width, $height, $t) = @getimagesize($image)))
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) {
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$image =
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($t == IMAGETYPE_GIF) ? @imagecreatefromgif($image) : (
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($t == IMAGETYPE_WBMP) ? @imagecreatefromwbmp($image) : (
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($t == IMAGETYPE_JPEG) ? @imagecreatefromjpeg($image) : (
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($t == IMAGETYPE_PNG) ? @imagecreatefrompng($image) : (
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($t == IMAGETYPE_XBM) ? @imagecreatefromxbm($image) : false
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))));
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if ($t == IMAGETYPE_PNG) {
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imagealphablending($image, false);
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imagesavealpha($image, true);
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}
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return $image;
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} else
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return false;
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}
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// PSEUDO-ABSTRACT STATIC METHODS
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static function available() {
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return function_exists("imagecreatefromjpeg");
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}
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static function checkImage($file) {
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if (!is_string($file) ||
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((false === (list($width, $height, $t) = @getimagesize($file))))
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)
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return false;
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$img =
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($t == IMAGETYPE_GIF) ? @imagecreatefromgif($file) : (
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($t == IMAGETYPE_WBMP) ? @imagecreatefromwbmp($file) : (
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($t == IMAGETYPE_JPEG) ? @imagecreatefromjpeg($file) : (
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($t == IMAGETYPE_PNG) ? @imagecreatefrompng($file) : (
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($t == IMAGETYPE_XBM) ? @imagecreatefromxbm($file) : false
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))));
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return ($img !== false);
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}
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// OWN METHODS
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protected function output_png(array $options=array()) {
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$file = isset($options['file']) ? $options['file'] : null;
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$quality = isset($options['quality']) ? $options['quality'] : null;
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$filters = isset($options['filters']) ? $options['filters'] : null;
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if (($file === null) && !headers_sent())
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header("Content-Type: image/png");
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return imagepng($this->image, $file, $quality, $filters);
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}
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protected function output_jpeg(array $options=array()) {
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$file = isset($options['file']) ? $options['file'] : null;
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$quality = isset($options['quality'])
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? $options['quality']
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: self::DEFAULT_JPEG_QUALITY;
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if (($file === null) && !headers_sent())
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header("Content-Type: image/jpeg");
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return imagejpeg($this->image, $file, $quality);
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}
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protected function output_gif(array $options=array()) {
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$file = isset($options['file']) ? $options['file'] : null;
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if (isset($options['file']) && !headers_sent())
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header("Content-Type: image/gif");
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return imagegif($this->image, $file);
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}
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protected function gdColor() {
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$args = func_get_args();
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$exprRGB = '/^rgb\(\s*(\d{1,3})\s*\,\s*(\d{1,3})\s*\,\s*(\d{1,3})\s*\)$/i';
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$exprHex1 = '/^\#?([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i';
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$exprHex2 = '/^\#?([0-9a-f])([0-9a-f])([0-9a-f])$/i';
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$exprByte = '/^([01]?\d?\d|2[0-4]\d|25[0-5])$/';
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if (!isset($args[0]))
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return false;
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if (count($args[0]) == 3) {
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list($r, $g, $b) = $args[0];
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} elseif (preg_match($exprRGB, $args[0], $match)) {
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list($tmp, $r, $g, $b) = $match;
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} elseif (preg_match($exprHex1, $args[0], $match)) {
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list($tmp, $r, $g, $b) = $match;
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$r = hexdec($r);
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$g = hexdec($g);
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$b = hexdec($b);
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} elseif (preg_match($exprHex2, $args[0], $match)) {
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list($tmp, $r, $g, $b) = $match;
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$r = hexdec("$r$r");
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$g = hexdec("$g$g");
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$b = hexdec("$b$b");
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} elseif ((count($args) == 3) &&
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preg_match($exprByte, $args[0]) &&
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preg_match($exprByte, $args[1]) &&
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preg_match($exprByte, $args[2])
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) {
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list($r, $g, $b) = $args;
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} else
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return false;
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return imagecolorallocate($this->image, $r, $g, $b);
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}
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protected function imageFilledRectangle($x1, $y1, $x2, $y2, $color) {
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$color = $this->gdColor($color);
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if ($color === false) return false;
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return imageFilledRectangle($this->image, $x1, $y1, $x2, $y2, $color);
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}
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protected function imageCopyResampled(
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$src, $dstX=0, $dstY=0, $srcX=0, $srcY=0, $dstW=null, $dstH=null, $srcW=null, $srcH=null
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) {
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$imageDetails = $this->buildImage($src);
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if ($imageDetails === false)
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return false;
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list($src, $srcWidth, $srcHeight) = $imageDetails;
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if (is_null($dstW)) $dstW = $this->width - $dstW;
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if (is_null($dstH)) $dstH = $this->height - $dstY;
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if (is_null($srcW)) $srcW = $srcWidth - $srcX;
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if (is_null($srcH)) $srcH = $srcHeight - $srcY;
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return imageCopyResampled($this->image, $src, $dstX, $dstY, $srcX, $srcY, $dstW, $dstH, $srcW, $srcH);
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}
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}
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?>
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