Source for file class.imgresize.php

1     <?php
2     /*
3     METAjour version 1.6 - Content Management System
4     Copyright (C) 2003  IPW Systems A/S
5     
6     This program is free software; you can redistribute it and/or
7     modify it under the terms of the GNU General Public License
8     as published by the Free Software Foundation; either version 2
9     of the License, or (at your option) any later version.
10    
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15    
16    You should have received a copy of the GNU General Public License
17    along with this program; if not, write to the Free Software
18    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19    
20    $Id: class.imgresize.php,v 1.2 2004/10/11 00:10:30 jan Exp $
21    
22    */
23    class imgresize {
24        var $img;
25    
26        function imgresize($imgfile, $format) {
27            $this->img['ok'] = true;
28            //detect image format
29    #		$this->img["format"]=ereg_replace(".*\.(.*)$","\\1",$imgfile);
30    #		$this->img["format"]=strtoupper($this->img["format"]);
31            if ($format == "image/pjpeg" || $format == "image/jpeg" ) {
32                //JPEG
33                $this->img["format"]="JPEG";
34                $this->img["src"] = ImageCreateFromJPEG ($imgfile);
35            } elseif ($format == "image/png" ) {
36                //PNG
37                $this->img["format"]="PNG";
38                $this->img["src"] = ImageCreateFromPNG ($imgfile);
39    # GIF IS UNFORTUNATELY NOT SUPPORTED BY ALL VERSIONS OF GD BECAUS OF PATENT ISSUES
40    #		} elseif ($format == "image/gif" ) {
41    #			//GIF
42    #			$this->img["format"]="GIF";
43    #			$this->img["src"] = ImageCreateFromGIF ($imgfile);
44            } elseif ($format == "image/wbmp" ) {
45                //WBMP
46                $this->img["format"]="WBMP";
47                $this->img["src"] = ImageCreateFromWBMP ($imgfile);
48            } else {
49                //DEFAULT
50                $this->img['ok'] = false;
51            }
52            if ($this->img['ok']) {
53                @$this->img["width"] = imagesx($this->img["src"]);
54                @$this->img["height"] = imagesy($this->img["src"]);
55                //default quality jpeg
56                $this->img["quality"]=75;
57            }
58        }
59    
60        function size_height($size=100)
61        {
62            //height
63            $this->img["height_thumb"]=$size;
64            @$this->img["width_thumb"] = ($this->img["height_thumb"]/$this->img["height"])*$this->img["width"];
65        }
66    
67        function size_width($size=100)
68        {
69            //width
70            $this->img["width_thumb"]=$size;
71            @$this->img["height_thumb"] = ($this->img["width_thumb"]/$this->img["width"])*$this->img["height"];
72        }
73    
74        function size_auto($size=100)
75        {
76            //size
77            if ($this->img["width"]>=$this->img["height"]) {
78                $this->img["width_thumb"]=$size;
79                @$this->img["height_thumb"] = ($this->img["width_thumb"]/$this->img["width"])*$this->img["height"];
80            } else {
81                $this->img["height_thumb"]=$size;
82                @$this->img["width_thumb"] = ($this->img["height_thumb"]/$this->img["height"])*$this->img["width"];
83             }
84        }
85    
86        function jpeg_quality($quality=75)
87        {
88            //jpeg quality
89            $this->img["quality"]=$quality;
90        }
91    
92        function show()
93        {
94            //show thumb
95            @Header("Content-Type: image/".$this->img["format"]);
96    
97            /* change ImageCreateTrueColor to ImageCreate if your GD not supported ImageCreateTrueColor function*/
98            if (function_exists('imagecreatetruecolor')) {
99                $this->img["des"] = ImageCreateTrueColor($this->img["width_thumb"],$this->img["height_thumb"]);
100           } else {
101               $this->img["des"] = ImageCreate($this->img["width_thumb"],$this->img["height_thumb"]);
102           }
103           @imagecopyresized ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $this->img["width_thumb"], $this->img["height_thumb"], $this->img["width"], $this->img["height"]);
104   
105           if ($this->img["format"]=="JPG" || $this->img["format"]=="JPEG") {
106               //JPEG
107               imageJPEG($this->img["des"],"",$this->img["quality"]);
108           } elseif ($this->img["format"]=="PNG") {
109               //PNG
110               imagePNG($this->img["des"]);
111           } elseif ($this->img["format"]=="GIF") {
112               //GIF
113               imageGIF($this->img["des"]);
114           } elseif ($this->img["format"]=="WBMP") {
115               //WBMP
116               imageWBMP($this->img["des"]);
117           }
118       }
119   
120       function save($save="")
121       {
122           //save thumb
123           if (empty($save)) $save=strtolower("./thumb.".$this->img["format"]);
124           /* change ImageCreateTrueColor to ImageCreate if your GD not supported ImageCreateTrueColor function*/
125           if (function_exists('imagecreatetruecolor')) {
126               $this->img["des"] = ImageCreateTrueColor($this->img["width_thumb"],$this->img["height_thumb"]);
127           } else {
128               $this->img["des"] = ImageCreate($this->img["width_thumb"],$this->img["height_thumb"]);
129           }
130           @imagecopyresized ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $this->img["width_thumb"], $this->img["height_thumb"], $this->img["width"], $this->img["height"]);
131           
132           if ($this->img["format"]=="JPG" || $this->img["format"]=="JPEG") {
133               //JPEG
134               imageJPEG($this->img["des"],"$save",$this->img["quality"]);
135           } elseif ($this->img["format"]=="PNG") {
136               //PNG
137               imagePNG($this->img["des"],"$save");
138           } elseif ($this->img["format"]=="GIF") {
139               //GIF
140               imageGIF($this->img["des"],"$save");
141           } elseif ($this->img["format"]=="WBMP") {
142               //WBMP
143               imageWBMP($this->img["des"],"$save");
144           }
145       }
146   }
147   ?>