实现缩略图和加水印的php类

WBOY
Lepaskan: 2016-07-25 08:45:09
asal
755 orang telah melayarinya
  1. /**
  2. * 图片缩放水印类
  3. *
  4. * @version 1.0 ;
  5. *
  6. */
  7. class cls_photo
  8. {
  9. protected $waterrate = 0.2; //水印图标在图片上的比例
  10. protected $width = 300; //缩略图默认宽度
  11. protected $height = 200; //缩略图默认高度
  12. protected $padding = 5; //水印图到边的距离
  13. protected $water_mark = "./water.png";
  14. protected $water_mark_pos = 5;//水印图片位置(1=左上角,2=右上角,3=左下角,4=右下角,5中央)
  15. protected $watermode = 0;// 0缩略图时不打水印 1缩略图时打水印
  16. protected $magick_handle;//图片操作句柄
  17. protected $format = array('jpg','gif','png','jpeg'); // 图片文件格式限定
  18. protected $smallpic_mode = 2;//默认模式 0为不生成缩略图, 1为裁切缩放 ,2为比例缩放 3为缩放填充模式
  19. /**
  20. * 设置图片类参数
  21. *
  22. * @param $arg 图片参数 多次可放入数组里 如下
  23. * @param $protected 参数值
  24. * array(
  25. * 'waterrate'=>0.2,
  26. * 'water_mark'=>'./water.png',
  27. * 'water_mark_pos'=>4,
  28. * 'smallpic_mode'=>1
  29. * );
  30. * @return ture/false
  31. */
  32. public function set_args($arg,$val="")
  33. {
  34. $params = array('waterrate','water_mark','water_mark_pos','smallpic_mode','watermode','width','height');
  35. if(is_array($arg))
  36. {
  37. foreach ($arg as $k =>$v)
  38. {
  39. if(in_array($k,$params))
  40. {
  41. $this->$k = $v;
  42. }
  43. }
  44. }
  45. else
  46. {
  47. if(empty($val))
  48. {
  49. return false;
  50. }
  51. else
  52. {
  53. if(in_array($arg,$params))
  54. {
  55. $this->$arg = $val;
  56. }
  57. }
  58. }
  59. return true;
  60. }
  61. /**
  62. * 图片缩放
  63. *
  64. * @param $src_file 源文件路径
  65. * @param $dst_file 目标文件路径
  66. * @return 缩略图片路径/false
  67. */
  68. public function scale($src_file,$dst_file="")
  69. {
  70. $dst_width = $this->width;
  71. $dst_height = $this->height;
  72. $mode = $this->smallpic_mode;
  73. $magic_water_handle = NewMagickWand();
  74. if (!MagickReadImage($magic_water_handle, $src_file))return false;
  75. //类型
  76. $srcext = strtolower(MagickGetImageFormat($magic_water_handle));
  77. if($srcext=='bmp')
  78. {
  79. $srcext = 'jpeg';
  80. }
  81. if(!in_array($srcext,$this->format))return false;
  82. //尺寸
  83. $src_width = MagickGetImageWidth($magic_water_handle);
  84. $src_height = MagickGetImageHeight($magic_water_handle);
  85. //裁切缩放模式
  86. if($mode == 1)
  87. {
  88. $pos_x=$pos_y = 0;//裁切临时位置
  89. $src_widthc = $src_width;//裁切临时宽度
  90. $src_heightc = $src_height;//裁切临时高度
  91. if($src_width/$src_height>$dst_width/$dst_height)
  92. {
  93. $src_widthc = $src_height*$dst_width/$dst_height;
  94. $pos_x = ($src_width-$src_widthc)/2;
  95. }
  96. else
  97. {
  98. $src_heightc = $src_width*$dst_height/$dst_width;
  99. $pos_y = ($src_height-$src_heightc)/2;
  100. }
  101. MagickCropImage($magic_water_handle,$src_widthc,$src_heightc,$pos_x,$pos_y);//裁切
  102. //因为MagickCropImage函数后,Gif 图像改,但画布不变
  103. $this->magick_handle = NewMagickWand();
  104. MagickNewImage($this->magick_handle,$src_widthc,$src_heightc,'#ffffff');
  105. MagickSetFormat($this->magick_handle,$srcext);
  106. MagickCompositeImage($this->magick_handle,$magic_water_handle,MW_OverCompositeOp,0,0);
  107. //缩放
  108. MagickScaleImage($this->magick_handle, $dst_width, $dst_height);
  109. }
  110. //比例缩放模式
  111. if($mode == 2)
  112. {
  113. if($src_width/$src_height>$dst_width/$dst_height)
  114. {
  115. $dst_height=$dst_width*$src_height/$src_width;
  116. }
  117. else
  118. {
  119. $dst_width=$dst_height*$src_width/$src_height;
  120. }
  121. $this->magick_handle=$magic_water_handle;//替换
  122. MagickScaleImage($this->magick_handle, $dst_width, $dst_height);//缩放
  123. }
  124. //缩放填充模式
  125. if($mode == 3)
  126. {
  127. if($src_width/$src_height>$dst_width/$dst_height)
  128. {
  129. $dst_heightc=$dst_width*$src_height/$src_width;
  130. $dst_widthc=$dst_width;
  131. }
  132. else
  133. {
  134. $dst_widthc=$dst_height*$src_width/$src_height;
  135. $dst_heightc=$dst_height;
  136. }
  137. MagickScaleImage($magic_water_handle, $dst_widthc, $dst_heightc);//缩放
  138. $this->magick_handle = NewMagickWand();
  139. MagickNewImage($this->magick_handle,$dst_width,$dst_height,$this->smallpic_bgcolor);
  140. MagickSetFormat($this->magick_handle,$srcext);
  141. MagickCompositeImage($this->magick_handle,$magic_water_handle,MW_OverCompositeOp,($dst_width-$dst_widthc)/2,($dst_height-$dst_heightc)/2);
  142. }
  143. //打水印
  144. if($this->watermode == 1)
  145. {
  146. $this->set_mark();
  147. }
  148. if(empty($dst_file))
  149. {
  150. //建立临时文件
  151. $dst_file = tempnam($_SERVER["SINASRV_CACHE_DIR"],"TMP_IMG");
  152. }
  153. MagickWriteImage($this->magick_handle, $dst_file);
  154. return $dst_file;
  155. }
  156. /**
  157. * 打水印
  158. *
  159. * @param $src_file 要打水印的图片路径
  160. * @param $dst_file 生产水印的文件保存路径,为空则生产随机临时文件
  161. * @return 水印文件路径/false
  162. */
  163. public function water_mark($src_file,$dst_file="")
  164. {
  165. $this->magick_handle = NewMagickWand();
  166. if (!MagickReadImage($this->magick_handle, $src_file))
  167. return false;
  168. $this->set_mark();
  169. if(empty($dst_file))
  170. {
  171. //建立临时文件
  172. $dst_file = tempnam($_SERVER["SINASRV_CACHE_DIR"],"TMP_IMG");
  173. }
  174. MagickWriteImage($this->magick_handle, $dst_file);
  175. return $dst_file;
  176. }
  177. /**
  178. * 对内接口
  179. * 给图片打水印
  180. *
  181. */
  182. protected function set_mark()
  183. {
  184. //尺寸
  185. $dst_width = MagickGetImageWidth($this->magick_handle);
  186. $dst_height = MagickGetImageHeight($this->magick_handle);
  187. //处理水印图
  188. if ($this->water_mark && is_file($this->water_mark))
  189. {
  190. $magic_water_handle = NewMagickWand();
  191. MagickRemoveImage($magic_water_handle);
  192. if (MagickReadImage($magic_water_handle, $this->water_mark))
  193. {
  194. MagickScaleImage($magic_water_handle, $dst_width*$this->waterrate, $dst_width*$this->waterrate*MagickGetImageHeight($magic_water_handle)/MagickGetImageWidth($magic_water_handle));//缩放水印到图片的1/5
  195. if ($this->water_mark_pos == 1)
  196. {
  197. $left = $this->padding;
  198. $top = $this->padding;
  199. }
  200. elseif ($this->water_mark_pos == 2)
  201. {
  202. $left = $dst_width-$this->padding-MagickGetImageWidth($magic_water_handle);
  203. $top = $this->padding;
  204. }
  205. elseif ($this->water_mark_pos == 3)
  206. {
  207. $left = $this->padding;
  208. $top = $dst_height -$this->padding-MagickGetImageHeight($magic_water_handle);
  209. }
  210. elseif ($this->water_mark_pos == 4)
  211. {
  212. $left = $dst_width-$this->padding-MagickGetImageWidth($magic_water_handle);
  213. $top =$dst_height -$this->padding-MagickGetImageHeight($magic_water_handle);
  214. }
  215. elseif ($this->water_mark_pos == 5)
  216. {
  217. $left = ($dst_width-MagickGetImageWidth($magic_water_handle))/2;
  218. $top =($dst_height -MagickGetImageHeight($magic_water_handle))/2;
  219. }
  220. MagickCompositeImage($this->magick_handle,$magic_water_handle,MW_OverCompositeOp,$left,$top);
  221. }
  222. }
  223. }
  224. }
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