PHP Imagick完美实现图片裁切、生成缩略图、添加水印

本文实例讲解了PHP使用Imagick 裁切、生成缩略图、添加水印自动检测和处理,支持gif,分享给大家供大家参考,具体内容如下

调用方式:

1
2
3
4
5
6
7
include ‘imagick.class.php‘
$image = new lib_image_imagick(); 
$image->open(‘a.gif‘); 
$image->resize_to(100, 100, ‘scale_fill‘); 
$image->add_text(‘1024i.com‘, 10, 20); 
$image->add_watermark(‘1024i.gif‘, 10, 50); 
$image->save_to(‘x.gif‘);

imagick.class.php

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
<?php 
/*
@版本日期: 版本日期: 2012年1月18日
@著作权所有: 1024 intelligence ( <a href="http://www.1024i.com" target="_blank">http://www.1024i.com</a> )
获得使用本类库的许可, 您必须保留著作权声明信息.
报告漏洞,意见或建议, 请联系 Lou Barnes(iua1024@gmail.com)
*/ 
  
class lib_image_imagick 
private $image = null; 
private $type = null; 
// 构造函数 
public function __construct(){} 
  
// 析构函数 
public function __destruct() 
if($this->image!==null) $this->image->destroy(); 
// 载入图像 
public function open($path
$this->image = new Imagick( $path ); 
if($this->image) 
$this->type = strtolower($this->image->getImageFormat()); 
return $this->image; 
  
public function crop($x=0, $y=0, $width=null, $height=null) 
if($width==null) $width = $this->image->getImageWidth()-$x
if($height==null) $height = $this->image->getImageHeight()-$y
if($width<=0 || $height<=0) return
if($this->type==‘gif‘
$image = $this->image; 
$canvas = new Imagick(); 
$images = $image->coalesceImages(); 
foreach($images as $frame){ 
$img = new Imagick(); 
$img->readImageBlob($frame); 
$img->cropImage($width, $height, $x, $y); 
$canvas->addImage( $img ); 
$canvas->setImageDelay( $img->getImageDelay() ); 
$canvas->setImagePage($width, $height, 0, 0); 
$image->destroy(); 
$this->image = $canvas
else 
$this->image->cropImage($width, $height, $x, $y); 
/*
* 更改图像大小
$fit: 适应大小方式
‘force‘: 把图片强制变形成 $width X $height 大小
‘scale‘: 按比例在安全框 $width X $height 内缩放图片, 输出缩放后图像大小 不完全等于 $width X $height
‘scale_fill‘: 按比例在安全框 $width X $height 内缩放图片,安全框内没有像素的地方填充色, 使用此参数时可设置背景填充色 $bg_color = array(255,255,255)(红,绿,蓝, 透明度) 透明度(0不透明-127完全透明))
其它: 智能模能 缩放图像并载取图像的中间部分 $width X $height 像素大小
$fit = ‘force‘,‘scale‘,‘scale_fill‘ 时: 输出完整图像
$fit = 图像方位值 时, 输出指定位置部分图像
字母与图像的对应关系如下:
north_west north north_east
west center east
south_west south south_east
*/ 
public function resize_to($width = 100, $height = 100, $fit = ‘center‘, $fill_color = array(255,255,255,0) ) 
switch($fit
case ‘force‘
if($this->type==‘gif‘
$image = $this->image; 
$canvas = new Imagick(); 
$images = $image->coalesceImages(); 
foreach($images as $frame){ 
$img = new Imagick(); 
$img->readImageBlob($frame); 
$img->thumbnailImage( $width, $height, false ); 
$canvas->addImage( $img ); 
$canvas->setImageDelay( $img->getImageDelay() ); 
$image->destroy(); 
$this->image = $canvas
else 
$this->image->thumbnailImage( $width, $height, false ); 
break
case ‘scale‘
if($this->type==‘gif‘
$image = $this->image; 
$images = $image->coalesceImages(); 
$canvas = new Imagick(); 
foreach($images as $frame){ 
$img = new Imagick(); 
$img->readImageBlob($frame); 
$img->thumbnailImage( $width, $height, true ); 
$canvas->addImage( $img ); 
$canvas->setImageDelay( $img->getImageDelay() ); 
$image->destroy(); 
$this->image = $canvas
else 
$this->image->thumbnailImage( $width, $height, true ); 
break
case ‘scale_fill‘
$size = $this->image->getImagePage(); 
$src_width = $size[‘width‘]; 
$src_height = $size[‘height‘]; 
$x = 0; 
$y = 0; 
$dst_width = $width
$dst_height = $height
if($src_width*$height > $src_height*$width
$dst_height = intval($width*$src_height/$src_width); 
$y = intval( ($height-$dst_height)/2 ); 
else 
$dst_width = intval($height*$src_width/$src_height); 
$x = intval( ($width-$dst_width)/2 ); 
$image = $this->image; 
$canvas = new Imagick(); 
$color = ‘rgba(‘.$fill_color[0].‘,‘.$fill_color[1].‘,‘.$fill_color[2].‘,‘.$fill_color[3].‘)‘
if($this->type==‘gif‘
$images = $image->coalesceImages(); 
foreach($images as $frame
$frame->thumbnailImage( $width, $height, true ); 
$draw = new ImagickDraw(); 
$draw->composite($frame->getImageCompose(), $x, $y, $dst_width, $dst_height, $frame); 
$img = new Imagick(); 
$img->newImage($width, $height, $color, ‘gif‘); 
$img->drawImage($draw); 
$canvas->addImage( $img ); 
$canvas->setImageDelay( $img->getImageDelay() ); 
$canvas->setImagePage($width, $height, 0, 0); 
else 
$image->thumbnailImage( $width, $height, true ); 
$draw = new ImagickDraw(); 
$draw->composite($image->getImageCompose(), $x, $y, $dst_width, $dst_height, $image); 
$canvas->newImage($width, $height, $color, $this->get_type() ); 
$canvas->drawImage($draw); 
$canvas->setImagePage($width, $height, 0, 0); 
$image->destroy(); 
$this->image = $canvas
break
default
$size = $this->image->getImagePage(); 
$src_width = $size[‘width‘]; 
$src_height = $size[‘height‘]; 
$crop_x = 0; 
$crop_y = 0; 
$crop_w = $src_width
$crop_h = $src_height
if($src_width*$height > $src_height*$width
$crop_w = intval($src_height*$width/$height); 
else 
$crop_h = intval($src_width*$height/$width); 
switch($fit
case ‘north_west‘
$crop_x = 0; 
$crop_y = 0; 
break
case ‘north‘
$crop_x = intval( ($src_width-$crop_w)/2 ); 
$crop_y = 0; 
break
case ‘north_east‘
$crop_x = $src_width-$crop_w
$crop_y = 0; 
break
case ‘west‘
$crop_x = 0; 
$crop_y = intval( ($src_height-$crop_h)/2 ); 
break
case ‘center‘
$crop_x = intval( ($src_width-$crop_w)/2 ); 
$crop_y = intval( ($src_height-$crop_h)/2 ); 
break
case ‘east‘
$crop_x = $src_width-$crop_w
$crop_y = intval( ($src_height-$crop_h)/2 ); 
break
case ‘south_west‘
$crop_x = 0; 
$crop_y = $src_height-$crop_h
break
case ‘south‘
$crop_x = intval( ($src_width-$crop_w)/2 ); 
$crop_y = $src_height-$crop_h
break
case ‘south_east‘
$crop_x = $src_width-$crop_w
$crop_y = $src_height-$crop_h
break
default
$crop_x = intval( ($src_width-$crop_w)/2 ); 
$crop_y = intval( ($src_height-$crop_h)/2 ); 
$image = $this->image; 
$canvas = new Imagick(); 
if($this->type==‘gif‘
$images = $image->coalesceImages(); 
foreach($images as $frame){ 
$img = new Imagick(); 
$img->readImageBlob($frame); 
$img->cropImage($crop_w, $crop_h, $crop_x, $crop_y); 
$img->thumbnailImage( $width, $height, true ); 
$canvas->addImage( $img ); 
$canvas->setImageDelay( $img->getImageDelay() ); 
$canvas->setImagePage($width, $height, 0, 0); 
else 
$image->cropImage($crop_w, $crop_h, $crop_x, $crop_y); 
$image->thumbnailImage( $width, $height, true ); 
$canvas->addImage( $image ); 
$canvas->setImagePage($width, $height, 0, 0); 
$image->destroy(); 
$this->image = $canvas
  
// 添加水印图片 
public function add_watermark($path, $x = 0, $y = 0) 
$watermark = new Imagick($path); 
$draw = new ImagickDraw(); 
$draw->composite($watermark->getImageCompose(), $x, $y, $watermark->getImageWidth(), $watermark->getimageheight(), $watermark); 
if($this->type==‘gif‘
$image = $this->image; 
$canvas = new Imagick(); 
$images = $image->coalesceImages(); 
foreach($image as $frame
$img = new Imagick(); 
$img->readImageBlob($frame); 
$img->drawImage($draw); 
$canvas->addImage( $img ); 
$canvas->setImageDelay( $img->getImageDelay() ); 
$image->destroy(); 
$this->image = $canvas
else 
$this->image->drawImage($draw); 
  
// 添加水印文字 
public function add_text($text, $x = 0 , $y = 0, $angle=0, $style=array()) 
$draw = new ImagickDraw(); 
if(isset($style[‘font‘])) $draw->setFont($style[‘font‘]); 
if(isset($style[‘font_size‘])) $draw->setFontSize($style[‘font_size‘]); 
if(isset($style[‘fill_color‘])) $draw->setFillColor($style[‘fill_color‘]); 
if(isset($style[‘under_color‘])) $draw->setTextUnderColor($style[‘under_color‘]); 
if($this->type==‘gif‘
foreach($this->image as $frame
$frame->annotateImage($draw, $x, $y, $angle, $text); 
else 
$this->image->annotateImage($draw, $x, $y, $angle, $text); 
  
// 保存到指定路径 
public function save_to( $path
if($this->type==‘gif‘
$this->image->writeImages($path, true); 
else 
$this->image->writeImage($path); 
// 输出图像 
public function output($header = true) 
if($header) header(‘Content-type: ‘.$this->type); 
echo $this->image->getImagesBlob(); 
  
public function get_width() 
$size = $this->image->getImagePage(); 
return $size[‘width‘]; 
public function get_height() 
$size = $this->image->getImagePage(); 
return $size[‘height‘]; 
// 设置图像类型, 默认与源类型一致 
public function set_type( $type=‘png‘
$this->type = $type
$this->image->setImageFormat( $type ); 
// 获取源图像类型 
public function get_type() 
return $this->type; 
  
// 当前对象是否为图片 
public function is_image() 
if( $this->image ) 
return true; 
else 
return false; 
  
public function thumbnail($width = 100, $height = 100, $fit = true){ $this->image->thumbnailImage( $width, $height, $fit );} // 生成缩略图 $fit为真时将保持比例并在安全框 $width X $height 内生成缩略图片 
/*
添加一个边框
$width: 左右边框宽度
$height: 上下边框宽度
$color: 颜色: RGB 颜色 ‘rgb(255,0,0)‘ 或 16进制颜色 ‘#FF0000‘ 或颜色单词 ‘white‘/‘red‘...
*/ 
public function border($width, $height, $color=‘rgb(220, 220, 220)‘
$color=new ImagickPixel(); 
$color->setColor($color); 
$this->image->borderImage($color, $width, $height); 
public function blur($radius, $sigma){$this->image->blurImage($radius, $sigma);} // 模糊 
public function gaussian_blur($radius, $sigma){$this->image->gaussianBlurImage($radius, $sigma);} // 高斯模糊 
public function motion_blur($radius, $sigma, $angle){$this->image->motionBlurImage($radius, $sigma, $angle);} // 运动模糊 
public function radial_blur($radius){$this->image->radialBlurImage($radius);} // 径向模糊 
public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // 添加噪点 
public function level($black_point, $gamma, $white_point){$this->image->levelImage($black_point, $gamma, $white_point);} // 调整色阶 
public function modulate($brightness, $saturation, $hue){$this->image->modulateImage($brightness, $saturation, $hue);} // 调整亮度、饱和度、色调 
public function charcoal($radius, $sigma){$this->image->charcoalImage($radius, $sigma);} // 素描 
public function oil_paint($radius){$this->image->oilPaintImage($radius);} // 油画效果 
public function flop(){$this->image->flopImage();} // 水平翻转 
public function flip(){$this->image->flipImage();} // 垂直翻转 
}

PHP Imagick完美实现图片裁切、生成缩略图、添加水印

上一篇:PHP中使用Imagick实现各种图片效果实例


下一篇:NET CORE在Linux下部署并且用Nginx 做负载均衡(主要说明CentOS)