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| 1 | <?php | |
| 2 | /** | |
| 3 | * This classes allows you to create thumbnails. Input images will be resized, | |
| 4 | * while the ratio keeps intact, and will cropped to the size given. | |
| 5 | * @author Corné Dorrestijn | |
| 6 | * @license http://www.gnu.org/copyleft/lesser.html GNU Library General Public License | |
| 7 | * @package Default | |
| 8 | */ | |
| 9 | class Thumbnail | |
| 10 | {
| |
| 11 | private $imageData, $newImage, $sourceWidth, $sourceHeight; | |
| 12 | public $width, $height; | |
| 13 | public $quality = 1; | |
| 14 | /** | |
| 15 | * Constructor | |
| 16 | * @param string $url The url to the local file. | |
| 17 | * @param integer $width The width of the thumbnail, default 100px. | |
| 18 | * @param integer $height The height of the thumbnail, default 100px. | |
| 19 | * @return void|String returns a string if there is a error. | |
| 20 | */ | |
| 21 | public function __construct($url, $width = 100, $height = 100) | |
| 22 | {
| |
| 23 | - | if(!isset($url) && $url === undefined && $url === '') die("No image url given.");
|
| 23 | + | if(!isset($url) && $url === undefined && $url === '') return "No image url given."; |
| 24 | - | if(!is_readable($url)) die('Image "' . $url . '" file not readable.');
|
| 24 | + | if(!is_readable($url)) return 'Image "' . $url . '" file not readable.'; |
| 25 | $this->width = $width; | |
| 26 | $this->height = $height; | |
| 27 | $this->imageData = imagecreatefromstring(file_get_contents($url)); | |
| 28 | list($this->sourceWidth, $this->sourceHeight) = getimagesize($url); | |
| 29 | $this->redraw(); | |
| 30 | return; | |
| 31 | } | |
| 32 | ||
| 33 | /** | |
| 34 | * Generates a jpeg image. | |
| 35 | * @param boolean $redraw If set to true it will redraw the image. | |
| 36 | * @param string $path If set it will save the image to the given path. | |
| 37 | * @return void|String returns a string if there is a error. | |
| 38 | */ | |
| 39 | public function getJpeg($redraw = true, $path = '') | |
| 40 | {
| |
| 41 | if($redraw) $this->redraw(); | |
| 42 | $q = round($this->quality * 99); | |
| 43 | if($path !== '') | |
| 44 | {
| |
| 45 | if(imagejpeg($this->newImage, $path, $q)) | |
| 46 | {
| |
| 47 | ||
| 48 | } | |
| 49 | else | |
| 50 | {
| |
| 51 | - | echo "Image NOT saved"; |
| 51 | + | return "Image NOT saved"; |
| 52 | } | |
| 53 | } | |
| 54 | else | |
| 55 | {
| |
| 56 | header ('Content-Type: image/jpeg');
| |
| 57 | imagejpeg($this->newImage, NULL, $q); | |
| 58 | } | |
| 59 | ||
| 60 | imagedestroy($this->newImage); | |
| 61 | return; | |
| 62 | } | |
| 63 | ||
| 64 | /** | |
| 65 | * Generates a png image. | |
| 66 | * @param boolean $redraw If set to true it will redraw the image. | |
| 67 | * @param string $path If set it will save the image to the given path. | |
| 68 | * @return void|String returns a string if there is a error. | |
| 69 | */ | |
| 70 | public function getPng($redraw = true, $path = '') | |
| 71 | {
| |
| 72 | if($redraw) $this->redraw(); | |
| 73 | $q = 9-round($this->quality * 9); | |
| 74 | if($path !== '') | |
| 75 | {
| |
| 76 | if(imagepng($this->newImage, $path, $q)) | |
| 77 | {
| |
| 78 | ||
| 79 | } | |
| 80 | else | |
| 81 | {
| |
| 82 | - | echo "Image NOT saved"; |
| 82 | + | return "Image NOT saved"; |
| 83 | } | |
| 84 | } | |
| 85 | else | |
| 86 | {
| |
| 87 | header ('Content-Type: image/png');
| |
| 88 | imagepng($this->newImage, NULL, $q); | |
| 89 | } | |
| 90 | ||
| 91 | imagedestroy($this->newImage); | |
| 92 | return; | |
| 93 | } | |
| 94 | ||
| 95 | /** | |
| 96 | * Generates a gif image. | |
| 97 | * @param boolean $redraw If set to true it will redraw the image. | |
| 98 | * @param string $path If set it will save the image to the given path. | |
| 99 | * @return void|String returns a string if there is a error. | |
| 100 | */ | |
| 101 | public function getGif($redraw = true, $path = '') | |
| 102 | {
| |
| 103 | if($redraw) $this->redraw(); | |
| 104 | if($path !== '') | |
| 105 | {
| |
| 106 | if(imagegif($this->newImage, $path)) | |
| 107 | {
| |
| 108 | ||
| 109 | } | |
| 110 | else | |
| 111 | {
| |
| 112 | - | echo "Image NOT saved"; |
| 112 | + | return "Image NOT saved"; |
| 113 | } | |
| 114 | } | |
| 115 | else | |
| 116 | {
| |
| 117 | header ('Content-Type: image/gif');
| |
| 118 | imagegif($this->newImage); | |
| 119 | } | |
| 120 | imagedestroy($this->newImage); | |
| 121 | return; | |
| 122 | } | |
| 123 | ||
| 124 | /** | |
| 125 | * Draws the scaled and cropped image in $this->newImage. | |
| 126 | * @return void. | |
| 127 | */ | |
| 128 | private function redraw() | |
| 129 | {
| |
| 130 | $newWidth = $this->width; | |
| 131 | $newHeight = $this->height; | |
| 132 | $offsetX = 0; | |
| 133 | $offsetY = 0; | |
| 134 | $pr = $this->sourceWidth/$this->sourceHeight; | |
| 135 | $tr = $this->width/$this->height; | |
| 136 | if($pr > $tr) | |
| 137 | {
| |
| 138 | $newWidth = round($this->height*$pr); | |
| 139 | $offsetX = -round(($newWidth - $this->width) / 2); | |
| 140 | } | |
| 141 | else | |
| 142 | {
| |
| 143 | $newHeight = round($this->width/$pr); | |
| 144 | $offsetY = -round(($newHeight - $this->height) / 2); | |
| 145 | } | |
| 146 | $this->newImage = imagecreatetruecolor($this->width, $this->height); | |
| 147 | imagecopyresampled($this->newImage, $this->imageData, $offsetX, $offsetY, 0, 0, $newWidth, $newHeight, $this->sourceWidth, $this->sourceHeight); | |
| 148 | return; | |
| 149 | } | |
| 150 | } | |
| 151 | ?> |
