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PHP class that implements thumbnails and watermarks

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2016-07-25 08:45:09759browse
  1. /**
  2. * Image scaling watermark class
  3. *
  4. * @version 1.0;
  5. *
  6. */
  7. class cls_photo
  8. {
  9. protected $waterrate = 0.2; //The ratio of the watermark icon on the image
  10. protected $width = 300; //The default width of the thumbnail
  11. protected $height = 200; //Default height of thumbnail
  12. protected $padding = 5; //Distance from watermark image to edge
  13. protected $water_mark = "./water.png";
  14. protected $water_mark_pos = 5; //Watermark image position ( 1=upper left corner, 2=upper right corner, 3=lower left corner, 4=lower right corner, 5 center)
  15. protected $watermode = 0; // 0 does not print watermark when thumbnail 1 prints watermark when thumbnail
  16. protected $magick_handle; //Picture operation handle
  17. protected $format = array('jpg','gif','png','jpeg'); // Picture file format limitation
  18. protected $smallpic_mode = 2; //Default mode 0 is not generated Thumbnail, 1 is crop scaling, 2 is proportional scaling, 3 is scaling fill mode
  19. /**
  20. * Set image parameters
  21. *
  22. * @param $arg Image parameters can be put into the array multiple times as follows
  23. * @param $protected parameter value
  24. * array(
  25. * 'waterrate'=>0.2,
  26. * 'water_mark '=>'./water.png',
  27. * 'water_mark_pos'=>4,
  28. * 'smallpic_mode'=>1
  29. * );
  30. * @return ture/false
  31. */
  32. public function set_args($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. * Image scaling
  63. *
  64. * @param $src_file source file path
  65. * @param $dst_file destination file path
  66. * @return thumbnail image path/false
  67. */
  68. public function scale($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. //Type
  76. $srcext = strtolower(MagicGetImageFormat($magic_water_handle) );
  77. if($srcext=='bmp')
  78. {
  79. $srcext = 'jpeg';
  80. }
  81. if(!in_array($srcext,$this->format))return false;
  82. //size
  83. $src_width = MagickGetImageWidth($magic_water_handle);
  84. $src_height = MagickGetImageHeight($magic_water_handle);
  85. //Crop scaling mode
  86. if($mode == 1)
  87. {
  88. $pos_x=$pos_y = 0;//Crop Cut temporary position
  89. $src_widthc = $src_width;//Cut temporary width
  90. $src_heightc = $src_height;//Cut temporary height
  91. if($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; dst_height/$ dst_width;
  95. $ POS_Y = ($ SRC_HEIGHT -$src_heightc)/2;
  96. }
  97. MagickCropImage($magic_water_handle,$src_widthc,$src_heightc,$pos_x,$pos_y);//Crop
  98. //Because after the MagickCropImage function, the Gif image changes, but the canvas remains unchanged
  99. $ this->magick_handle = NewMagickWand();
  100. MagickNewImage($this->magick_handle,$src_widthc,$src_heightc,'#ffffff');
  101. MagickSetFormat($this->magick_handle,$srcext);
  102. MagickCompositeImage($ this->magick_handle,$magic_water_handle,MW_OverCompositeOp,0,0);
  103. //Scale
  104. MagickScaleImage($this->magick_handle, $dst_width, $dst_height);
  105. }
  106. //Proportional scaling mode
  107. if($ mode == 2)
  108. {
  109. if($src_width/$src_height>$dst_width/$dst_height)
  110. {
  111. $dst_height=$dst_width*$src_height/$src_width;
  112. }
  113. else
  114. {
  115. $dst_width=$dst_height * $src_width/$src_height;
  116. }
  117. $this->magick_handle=$magic_water_handle;//替换
  118. MagickScaleImage($this->magick_handle, $dst_width, $dst_height);//缩放
  119. }
  120. //缩放填充模式
  121. if($mode == 3)
  122. {
  123. if($src_width/$src_height>$dst_width/$dst_height)
  124. {
  125. $dst_heightc=$dst_width*$src_height/$src_width;
  126. $dst_widthc=$dst_width;
  127. }
  128. else
  129. {
  130. $dst_widthc=$dst_height*$src_width/$src_height;
  131. $dst_heightc=$dst_height;
  132. }
  133. MagickScaleImage($magic_water_handle, $dst_widthc, $dst_heightc);//缩放
  134. $this->magick_handle = NewMagickWand();
  135. MagickNewImage($this->magick_handle,$dst_width,$dst_height,$this->smallpic_bgcolor);
  136. MagickSetFormat($this->magick_handle,$srcext);
  137. MagickCompositeImage($this->magick_handle,$magic_water_handle,MW_OverCompositeOp,($dst_width-$dst_widthc)/2,($dst_height-$dst_heightc)/2);
  138. }
  139. //打水印
  140. if($this->watermode == 1)
  141. {
  142. $this->set_mark();
  143. }
  144. if(empty($dst_file))
  145. {
  146. //建立临时文件
  147. $dst_file = tempnam($_SERVER["SINASRV_CACHE_DIR"],"TMP_IMG");
  148. }
  149. MagickWriteImage($this->magick_handle, $dst_file);
  150. return $dst_file;
  151. }
  152. /**
  153. * Watermarking
  154. *
  155. * @param $src_file The path of the image to be watermarked
  156. * @param $dst_file The file saving path for producing watermarks. If it is empty, a random temporary file will be produced
  157. * @return The path of the watermark file/false
  158. */
  159. public function water_mark($src_file,$dst_file="")
  160. {
  161. $this->magick_handle = NewMagickWand();
  162. if (!MagickReadImage($this->magick_handle, $src_file))
  163. return false;
  164. $this->set_mark();
  165. if(empty($dst_file))
  166. {
  167. //建立临时文件
  168. $dst_file = tempnam($_SERVER["SINASRV_CACHE_DIR"],"TMP_IMG");
  169. }
  170. MagickWriteImage($this->magick_handle, $dst_file);
  171. return $dst_file;
  172. }
  173. /**
  174. * Internal interface
  175. * Watermark pictures
  176. *
  177. */
  178. protected function set_mark()
  179. {
  180. //尺寸
  181. $dst_width = MagickGetImageWidth($this->magick_handle);
  182. $dst_height = MagickGetImageHeight($this->magick_handle);
  183. //处理水印图
  184. if ($this->water_mark && is_file($this->water_mark))
  185. {
  186. $magic_water_handle = NewMagickWand();
  187. MagickRemoveImage($magic_water_handle);
  188. if (MagickReadImage($magic_water_handle, $this->water_mark))
  189. {
  190. MagickScaleImage($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
  191. if ($this->water_mark_pos == 1)
  192. {
  193. $left = $this->padding;
  194. $top = $this->padding;
  195. }
  196. elseif ($this->water_mark_pos == 2)
  197. {
  198. $left = $dst_width-$this->padding-MagickGetImageWidth($magic_water_handle);
  199. $top = $this->padding;
  200. }
  201. elseif ($this->water_mark_pos == 3)
  202. {
  203. $left = $this->padding;
  204. $top = $dst_height -$this->padding-MagickGetImageHeight($magic_water_handle);
  205. }
  206. elseif ($this->water_mark_pos == 4)
  207. {
  208. $left = $dst_width-$this->padding-MagickGetImageWidth($magic_water_handle);
  209. $top =$dst_height -$this->padding-MagickGetImageHeight($magic_water_handle);
  210. }
  211. elseif ($this->water_mark_pos == 5)
  212. {
  213. $left = ($dst_width-MagickGetImageWidth($magic_water_handle))/2;
  214. $top =($dst_height -MagickGetImageHeight($magic_water_handle))/2;
  215. }
  216. MagickCompositeImage($this->magick_handle,$magic_water_handle,MW_OverCompositeOp,$left,$top);
  217. }
  218. }
  219. }
  220. }
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