这篇文章主要介绍了php实现的通用图片处理类,可实现针对图片的缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色等功能,具有一定参考借鉴价值,需要的朋友可以参考下。

本文实例讲述了php实现的通用图片处理类，分享给大家供大家参考，具体如下：

该图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色，处理并保存历史记录的思路：当有图片有改动时自动生成一张新图片，命名方式可以考虑在原图片的基础上加上步骤，例如：图片名称+__第几步。 在一些需要图片高级处理功能的Web应用中，可以参考这个类。

1. <?php
2. class picture
3. {
4. var $PICTURE_URL;//要处理的图片
5. var $DEST_URL="temp__01.jpg";//生成目标图片位置
6. var $PICTURE_CREATE;//要创建的图片
7. var $TURE_COLOR;//新建一个真彩图象
8. var $PICTURE_WIDTH;//原图片宽度
9. var $PICTURE_HEIGHT;//原图片高度
10. /*
11. 水印的类型，默认的为水印文字
12. */
13. var $MARK_TYPE=1;
14. var $WORD;//经过UTF-8后的文字
15. var $WORD_X;//文字横坐标
16. var $WORD_Y;//文字纵坐标
17. var $FONT_TYPE;//字体类型
18. var $FONT_SIZE="12";//字体大小
19. var $FONT_WORD;//文字
20. var $ANGLE=0;//文字的角度，默认为0
21. var $FONT_COLOR="#000000";//文字颜色
22. var $FONT_PATH="font/simkai.ttf";//字体库，默认为宋体
23. var $FORCE_URL;//水印图片
24. var $FORCE_X=0;//水印横坐标
25. var $FORCE_Y=0;//水印纵坐标
26. var $FORCE_START_X=0;//切起水印的图片横坐标
27. var $FORCE_START_Y=0;//切起水印的图片纵坐标
28. var $PICTURE_TYPE;//图片类型
29. var $PICTURE_MIME;//输出的头部
30. /*
31. 缩放比例为1的话就按缩放高度和宽度缩放
32. */
33. var $ZOOM=1;//缩放类型
34. var $ZOOM_MULTIPLE;//缩放比例
35. var $ZOOM_WIDTH;//缩放宽度
36. var $ZOOM_HEIGHT;//缩放高度
37. /*
38. 裁切，按比例和固定长度、宽度
39. */
40. var $CUT_TYPE=1;//裁切类型
41. var $CUT_X=0;//裁切的横坐标
42. var $CUT_Y=0;//裁切的纵坐标
43. var $CUT_;//裁切的宽度
44. var $CUT_HEIGHT=100;//裁切的高度
45. /*
46. 锐化
47. */
48. var $SHARP="7.0";//锐化程度
49. /*
50. 透明度处理
51. */
52. var $ALPHA='100';//透明度在0-127之间
53. var $ALPHA_X="90";
54. var $ALPHA_Y="50";
55. /*
56. 任意角度旋转
57. */
58. var $CIRCUMROTATE="90.0";//注意，必须为浮点数
59. /*
60. 出错信息
61. */
62. var $ERROR=array(
63. 'unalviable'=>'没有找到相关图片!'
64. );
65. /*
66. 构造函数：函数初始化
67. */
68. function __construct($PICTURE_URL)
69. {
70. $this->get_info($PICTURE_URL);
71. }
72. function get_info($PICTURE_URL)
73. {
74. /*
75. 处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息
76. */
77. @$SIZE=getimagesize($PICTURE_URL);
78. if(!$SIZE)
79. {
80. exit($this->ERROR['unalviable']);
81. }
82. //得到原图片的信息类型、宽度、高度
83. $this->PICTURE_MIME=$SIZE['mime'];
84. $this->PICTURE_;
85. $this->PICTURE_HEIGHT=$SIZE[1];
86. //创建图片
87. switch($SIZE[2])
88. {
89. case 1:
90. $this->PICTURE_CREATE=imagecreatefromgif($PICTURE_URL);
91. $this->PICTURE_TYPE="imagejpeg";
92. $this->PICTURE_EXT="jpg";
93. break;
94. case 2:
95. $this->PICTURE_CREATE=imagecreatefromjpeg($PICTURE_URL);
96. $this->PICTURE_TYPE="imagegif";
97. $this->PICTURE_EXT="gif";
98. break;
99. case 3:
100. $this->PICTURE_CREATE=imagecreatefrompng($PICTURE_URL);
101. $this->PICTURE_TYPE="imagepng";
102. $this->PICTURE_EXT="png";
103. break;
104. }
105. /*
106. 文字颜色转换16进制转换成10进制
107. */
108. preg_match_all("/([0-f]){2,2}/i",$this->FONT_COLOR,$MATCHES);
109. if(count($MATCHES)==3)
110. {
111. $this->RED=hexdec($MATCHES[0][0]);
112. $this->GREEN=hexdec($MATCHES[0][1]);
113. $this->BLUE=hexdec($MATCHES[0][2]);
114. }
115. }
116. //end of __construct
117. /*
118. 将16进制的颜色转换成10进制的（R，G，B）
119. */
120. function hex2dec()
121. {
122. preg_match_all("/([0-f]){2,2}/i",$this->FONT_COLOR,$MATCHES);
123. if(count($MATCHES)==3)
124. {
125. $this->RED=hexdec($MATCHES[0][0]);
126. $this->GREEN=hexdec($MATCHES[0][1]);
127. $this->BLUE=hexdec($MATCHES[0][2]);
128. }
129. }
130. //缩放类型
131. function zoom_type($ZOOM_TYPE)
132. {
133. $this->ZOOM=$ZOOM_TYPE;
134. }
135. //对图片进行缩放,如果不指定高度和宽度就进行缩放
136. function zoom()
137. {
138. //缩放的大小
139. if($this->ZOOM==0)
140. {
141. $this->ZOOM_;gt;PICTURE_WIDTH * $this->ZOOM_MULTIPLE;
142. $this->ZOOM_HEIGHT=$this->PICTURE_HEIGHT * $this->ZOOM_MULTIPLE;
143. }
144. //新建一个真彩图象
145. $this->TRUE_COLOR=imagecreatetruecolor($this->ZOOM_WIDTH,$this->ZOOM_HEIGHT);
146. $WHITE=imagecolorallocate($this->TRUE_COLOR,255,255,255);
147. imagefilledrectangle($this->TRUE_COLOR,0,0,$this->ZOOM_WIDTH,$this->ZOOM_HEIGHT,$WHITE);
148. imagecopyresized($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,0,0,$this->ZOOM_WIDTH,$this->ZOOM_HEIGHT,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
149. }
150. //end of zoom
151. //裁切图片,按坐标或自动
152. function cut()
153. {
154. $this->TRUE_COLOR=imagecreatetruecolor($this->CUT_WIDTH,$this->CUT_WIDTH);
155. imagecopy($this->TRUE_COLOR,$this->PICTURE_CREATE, 0, 0, $this->CUT_X, $this->CUT_Y,$this->CUT_WIDTH,$this->CUT_HEIGHT);
156. }
157. //end of cut
158. /*
159. 在图片上放文字或图片
160. 水印文字
161. */
162. function _mark_text()
163. {
164. $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
165. $this->WORD=mb_convert_encoding($this->FONT_WORD,'utf-8','gb2312');
166. /*
167. 取得使用 TrueType 字体的文本的范围
168. */
169. $TEMP = imagettfbbox($this->FONT_SIZE,0,$this->FONT_PATH,$this->WORD);
170. $WORD_LENGTH=strlen($this->WORD);
171. $WORD_WIDTH =$TEMP[2] - $TEMP[6];
172. $WORD_HEIGHT =$TEMP[3] - $TEMP[7];
173. /*
174. 文字水印的默认位置为右下角
175. */
176. if($this->WORD_X=="")
177. {
178. $this->WORD_X=$this->PICTURE_WIDTH-$WORD_WIDTH;
179. }
180. if($this->WORD_Y=="")
181. {
182. $this->WORD_Y=$this->PICTURE_HEIGHT-$WORD_HEIGHT;
183. }
184. imagesettile($this->TRUE_COLOR,$this->PICTURE_CREATE);
185. imagefilledrectangle($this->TRUE_COLOR,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT,IMG_COLOR_TILED);
186. $TEXT2=imagecolorallocate($this->TRUE_COLOR,$this->RED,$this->GREEN,$this->Blue);
187. imagettftext($this->TRUE_COLOR,$this->FONT_SIZE,$this->ANGLE,$this->WORD_X,$this->WORD_Y,$TEXT2,$this->FONT_PATH,$this->WORD);
188. }
189. /*
190. 水印图片
191. */
192. function _mark_picture()
193. {
194. /*
195. 获取水印图片的信息
196. */
197. @$SIZE=getimagesize($this->FORCE_URL);
198. if(!$SIZE)
199. {
200. exit($this->ERROR['unalviable']);
201. }
202. $FORCE_PICTURE_;
203. $FORCE_PICTURE_HEIGHT=$SIZE[1];
204. //创建水印图片
205. switch($SIZE[2])
206. {
207. case 1:
208. $FORCE_PICTURE_CREATE=imagecreatefromgif($this->FORCE_URL);
209. $FORCE_PICTURE_TYPE="gif";
210. break;
211. case 2:
212. $FORCE_PICTURE_CREATE=imagecreatefromjpeg($this->FORCE_URL);
213. $FORCE_PICTURE_TYPE="jpg";
214. break;
215. case 3:
216. $FORCE_PICTURE_CREATE=imagecreatefrompng($this->FORCE_URL);
217. $FORCE_PICTURE_TYPE="png";
218. break;
219. }
220. /*
221. 判断水印图片的大小，并生成目标图片的大小，如果水印比图片大，则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。
222. */
223. $this->NEW_PICTURE=$this->PICTURE_CREATE;
224. if($FORCE_PICTURE_WIDTH>$this->PICTURE_WIDTH)
225. {
226. $CREATE_;gt;FORCE_START_X;
227. }
228. else
229. {
230. $CREATE_;gt;PICTURE_WIDTH;
231. }
232. if($FORCE_PICTURE_HEIGHT>$this->PICTURE_HEIGHT)
233. {
234. $CREATE_HEIGHT=$FORCE_PICTURE_HEIGHT-$this->FORCE_START_Y;
235. }
236. else
237. {
238. $CREATE_HEIGHT=$this->PICTURE_HEIGHT;
239. }
240. /*
241. 创建一个画布
242. */
243. $NEW_PICTURE_CREATE=imagecreatetruecolor($CREATE_WIDTH,$CREATE_HEIGHT);
244. $WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
245. /*
246. 将背景图拷贝到画布中
247. */
248. imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
249. /*
250. 将目标图片拷贝到背景图片上
251. */
252. imagecopy($NEW_PICTURE_CREATE, $FORCE_PICTURE_CREATE, $this->FORCE_X, $this->FORCE_Y, $this->FORCE_START_X, $this->FORCE_START_Y,$FORCE_PICTURE_WIDTH,$FORCE_PICTURE_HEIGHT);
253. $this->TRUE_COLOR=$NEW_PICTURE_CREATE;
254. }
255. //end of mark
256. function alpha_()
257. {
258. $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
259. $rgb="#CDCDCD";
260. $tran_color="#000000";
261. for($j=0;$j<=$this->PICTURE_HEIGHT-1;$j++)
262. {
263. for ($i=0;$i<=$this->PICTURE_WIDTH-1;$i++)
264. {
265. $rgb = imagecolorat($this->PICTURE_CREATE,$i,$j);
266. $r = ($rgb >> 16) & 0xFF;
267. $g = ($rgb >> 8) & 0xFF;
268. $b = $rgb & 0xFF;
269. $now_color=imagecolorallocate($this->PICTURE_CREATE,$r,$g,$b);
270. if ($now_color==$tran_color)
271. {
272. continue;
273. }
274. else
275. {
276. $color=imagecolorallocatealpha($this->PICTURE_CREATE,$r,$g,$b,$ALPHA);
277. imagesetpixel($this->PICTURE_CREATE,$ALPHA_X+$i,$ALPHA_Y+$j,$color);
278. }
279. $this->TRUE_COLOR=$this->PICTURE_CREATE;
280. }
281. }
282. }
283. /*
284. 图片旋转:
285. 沿y轴旋转
286. */
287. function turn_y()
288. {
289. $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
290. for ($x = 0; $x < $this->PICTURE_WIDTH; $x++)
291. {
292. imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, $this->PICTURE_WIDTH - $x - 1, 0, $x, 0, 1, $this->PICTURE_HEIGHT);
293. }
294. }
295. /*
296. 沿X轴旋转
297. */
298. function turn_x()
299. {
300. $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
301. for ($y = 0; $y < $this->PICTURE_HEIGHT; $y++)
302. {
303. imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, 0, $this->PICTURE_HEIGHT - $y - 1, 0, $y, $this->PICTURE_WIDTH, 1);
304. }
305. }
306. /*
307. 任意角度旋转
308. */
309. function turn()
310. {
311. $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
312. imageCopyResized($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
313. $WHITE=imagecolorallocate($this->TRUE_COLOR,255,255,255);
314. $this->TRUE_COLOR=imagerotate ($this->TRUE_COLOR, $this->CIRCUMROTATE, $WHITE);
315. }
316. /*
317. 图片锐化
318. */
319. function sharp()
320. {
321. $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
322. $cnt=0;
323. for ($x=0; $x<$this->PICTURE_WIDTH; $x++)
324. {
325. for ($y=0; $y<$this->PICTURE_HEIGHT; $y++)
326. {
327. $src_clr1 = imagecolorsforindex($this->TRUE_COLOR, imagecolorat($this->PICTURE_CREATE, $x-1, $y-1));
328. $src_clr2 = imagecolorsforindex($this->TRUE_COLOR, imagecolorat($this->PICTURE_CREATE, $x, $y));
329. $r = intval($src_clr2["red"]+$this->SHARP*($src_clr2["red"]-$src_clr1["red"]));
330. $g = intval($src_clr2["green"]+$this->SHARP*($src_clr2["green"]-$src_clr1["green"]));
331. $b = intval($src_clr2["blue"]+$this->SHARP*($src_clr2["blue"]-$src_clr1["blue"]));
332. $r = min(255, max($r, 0));
333. $g = min(255, max($g, 0));
334. $b = min(255, max($b, 0));
335. if (($DST_CLR=imagecolorexact($this->PICTURE_CREATE, $r, $g, $b))==-1)
336. $DST_CLR = imagecolorallocate($this->PICTURE_CREATE, $r, $g, $b);
337. $cnt++;
338. if ($DST_CLR==-1) die("color allocate faile at $x, $y ($cnt).");
339. imagesetpixel($this->TRUE_COLOR, $x, $y, $DST_CLR);
340. }
341. }
342. }
343. /*
344. 将图片反色处理??
345. */
346. function return_color()
347. {
348. /*
349. 创建一个画布
350. */
351. $NEW_PICTURE_CREATE=imagecreate($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
352. $WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
353. /*
354. 将背景图拷贝到画布中
355. */
356. imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
357. $this->TRUE_COLOR=$NEW_PICTURE_CREATE;
358. }
359. /*
360. 生成目标图片并显示
361. */
362. function show()
363. {
364. // 判断浏览器,若是IE就不发送头
365. if(isset($_SERVER['HTTP_USER_AGENT']))
366. {
367. $ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
368. if(!preg_match('/^.*MSIE.*\)$/i',$ua))
369. {
370. header("Content-type:$this->PICTURE_MIME");
371. }
372. }
373. $OUT=$this->PICTURE_TYPE;
374. $OUT($this->TRUE_COLOR);
375. }
376. /*
377. 生成目标图片并保存
378. */
379. function save_picture()
380. {
381. // 以 JPEG 格式将图像输出到浏览器或文件
382. $OUT=$this->PICTURE_TYPE;
383. if(function_exists($OUT))
384. {
385. // 判断浏览器,若是IE就不发送头
386. if(isset($_SERVER['HTTP_USER_AGENT']))
387. {
388. $ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
389. if(!preg_match('/^.*MSIE.*\)$/i',$ua))
390. {
391. header("Content-type:$this->PICTURE_MIME");
392. }
393. }
394. if(!$this->TRUE_COLOR)
395. {
396. exit($this->ERROR['unavilable']);
397. }
398. else
399. {
400. $OUT($this->TRUE_COLOR,$this->DEST_URL);
401. $OUT($this->TRUE_COLOR);
402. }
403. }
404. }
405. /*
406. 析构函数：释放图片
407. */
408. function __destruct()
409. {
410. /*释放图片*/
411. imagedestroy($this->TRUE_COLOR);
412. imagedestroy($this->PICTURE_CREATE);
413. }
414. //end of class
415. }
416. ?>