PHP 添加水印 & 比例缩略图 & 固定高度 & 固定宽度 类。

1. //PHP 添加水印 & 比例缩略图 & 固定高度 & 固定宽度 类。
2. class Image_process{
3. public $source; //原图
4. public $source_width; //原图宽度
5. public $source_height; //原图高度
6. public $source_type_id;
7. public $orign_name;
8. public $orign_dirname;
10. //传入原图路径
11. public function __construct($source){
12. $this->typeList = array(1=>'gif',2=>'jpg',3=>'png');
13. $ginfo = getimagesize($source);
14. $this->source_width = $ginfo[0];
15. $this->source_height = $ginfo[1];
16. $this->source_type_id = $ginfo[2];
17. $this->orign_url = $source;
18. $this->orign_name = basename($source);
19. $this->orign_dirname = dirname($source);
20. }
22. //判断图片的文件的格式，返回PHP可识别的编码
23. public function judgeType($type,$source){
24. if($type == 1){
25. return imagecreatefromgif($source); //gif
26. }else if($type == 2){
27. return imagecreatefromjpeg($source); //jpg
28. }else if($type == 3){
29. return imagecreatefrompng($source); //png
30. }else{
31. return false;
32. }
33. }
35. //生成水印图片
36. public function waterMakeImage($logo){
37. $linfo = getimagesize($logo);
38. $logo_width = $linfo[0];
39. $logo_height = $linfo[1];
40. $logo_type_id = $linfo[2];
41. $sourceHandle = $this->judgeType($this->source_type_id,$this->orign_url);
42. $logoHandle = $this->judgeType($logo_type_id,$logo);
43. if(!$sourceHandle || !$logoHandle){
44. return false;
45. }
46. $x = ($this->source_width - $logo_width)/2;
47. $y = ($this->source_height - $logo_height)/2;
48. imagecopy($sourceHandle,$logoHandle,$x,$y,0,0,$logo_width,$logo_height);
49. $newPic = $this->orign_dirname.'\water_'.time().'.'.$this->typeList[$this->source_type_id];
50. if($this->saveImage($sourceHandle,$newPic)){
51. imagedestroy($sourceHandle);
52. imagedestroy($logoHandle);
53. }
54. }
56. //固定高度宽度
57. public function fixSizeImage($width,$height){
58. if($width > $this->source_width) $this->source_width;
59. if($height > $this->source_height) $this->source_height;
60. if($width === false){
61. $width = floor($this->source_width / ($this->source_height / $height));
62. }
63. if($height === false){
64. $height = floor($this->source_height / ($this->source_width / $width));
65. }
66. $this->tinyImage($width,$height);
67. }
69. //等比例缩放图片
70. public function scaleImage($scale){
71. $width = floor($this->source_width * $scale);
72. $height = floor($this->source_height * $scale);
73. $this->tinyImage($width, $height);
74. }
76. //创建缩略图
77. public function tinyImage($width,$height){
78. $tinyImage = imagecreatetruecolor($width,$height);
79. $handle = $this->judgeType($this->source_type_id,$this->orign_url);
80. if(function_exists('imagecopyresampled')){
81. imagecopyresampled($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);
82. }else{
83. imagecopyresized($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);
84. }
85. $newPic = $this->orign_dirname.'\thumb_'.time().'_'.$width."_".$height.".".$this->typeList[$this->source_type_id];
86. if($this->saveImage($tinyImage,$newPic)){
87. imagedestroy($tinyImage);
88. imagedestroy($handle);
89. }
90. }
91. //保存图片
92. private function saveImage($image,$url){
93. if(imagejpeg($image,$url)){
94. return true;
95. }
96. }
97. }
98. $imgHandle = new Image_process('D:\AppServ\www\test\getimg\14061907445601.jpg');
99. //$imgHandle->waterMakeImage('D:\AppServ\www\test\getimg\shougongke.png'); //生成水印图片
100. //$imgHandle->fixSizeImage(200,150); //固定长度图片
101. $imgHandle->scaleImage(0.2); //等比例缩放
102. ?>

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