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jpge与png图片的融合

时间：2021-07-01 10:21:17 帮助过：15人阅读

jpge图片与png图片的融合，其实就是大家熟悉的水印技术。下面代码中最重要的一句为：

https://img.gxlcms.com//https://img.gxlcms.com//设定图像的混色模式
imagealphablending($ground_im, true);

  1. https://img.gxlcms.com//*
  2. * 功能：PHP图片水印 (水印支持图片或文字)
  3. * 参数：
  4. * $groundImage 背景图片，即需要加水印的图片，暂只支持GIF,JPG,PNG格式；
  5. * $waterPos 水印位置，有10种状态，0为随机位置；
  6. * 1为顶端居左，2为顶端居中，3为顶端居右；
  7. * 4为中部居左，5为中部居中，6为中部居右；
  8. * 7为底端居左，8为底端居中，9为底端居右；
  9. * $waterImage 图片水印，即作为水印的图片，暂只支持GIF,JPG,PNG格式；
  10. * $waterText 文字水印，即把文字作为为水印，支持ASCII码，不支持中文；
  11. * $textFont 文字大小，值为1、2、3、4或5，默认为5；
  12. * $textColor 文字颜色，值为十六进制颜色值，默认为#FF0000(红色)；
  13. *
  14. * 注意：Support GD 2.0，Support FreeType、GIF Read、GIF Create、JPG 、PNG
  15. * $waterImage 和 $waterText 最好不要同时使用，选其中之一即可，优先使用 $waterImage。
  16. * 当$waterImage有效时，参数$waterString、$stringFont、$stringColor均不生效。
  17. * 加水印后的图片的文件名和 $groundImage 一样。
  18. * 作者：longware @ 2004-11-3 14:15:13
  19. *https://img.gxlcms.com//
  21. function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="",$textFont=5,$textColor="#FF0000")
  22. https://img.gxlcms.com//https://img.gxlcms.com//function imageWaterMark($groundImage,$waterPos=0,$waterImage,$waterText=,$textFont=5,$textColor=#FF0000″)
  23. {
  24. $isWaterImage = FALSE;
  25. $formatMsg = "暂不支持该文件格式，请用图片处理软件将图片转换为GIF、JPG、PNG格式。";
  26. https://img.gxlcms.com//https://img.gxlcms.com//读取水印文件
  27. if(!empty($waterImage) && file_exists($waterImage))
  28. {
  29. $isWaterImage = TRUE;
  30. $water_info = getimagesize($waterImage);
  31. $water_w = $water_info[0];https://img.gxlcms.com//https://img.gxlcms.com//取得水印图片的宽
  32. $water_h = $water_info[1];https://img.gxlcms.com//https://img.gxlcms.com//取得水印图片的高
  33. switch($water_info[2])https://img.gxlcms.com//https://img.gxlcms.com//取得水印图片的格式
  34. {
  35. case 1:$water_im = imagecreatefromgif($waterImage);break;
  36. case 2:$water_im = imagecreatefromjpeg($waterImage);break;
  37. case 3:$water_im = imagecreatefrompng($waterImage);break;
  38. default:die($formatMsg);
  39. }
  40. }
  41. https://img.gxlcms.com//https://img.gxlcms.com//读?尘巴计?
  42. if(!empty($groundImage) && file_exists($groundImage))
  43. {
  44. $ground_info = getimagesize($groundImage);
  45. $ground_w = $ground_info[0];https://img.gxlcms.com//https://img.gxlcms.com//取得背景图片的宽
  46. $ground_h = $ground_info[1];https://img.gxlcms.com//https://img.gxlcms.com//取得背景图片的高
  47. switch($ground_info[2])https://img.gxlcms.com//https://img.gxlcms.com//取得背景图片的格式
  48. {
  49. case 1:$ground_im = imagecreatefromgif($groundImage);break;
  50. case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
  51. case 3:$ground_im = imagecreatefrompng($groundImage);break;
  52. default:die($formatMsg);
  53. }
  54. }
  55. else
  56. {
  57. die("需要加水印的图片不存在！");
  58. }
  59. https://img.gxlcms.com//https://img.gxlcms.com//水印位置
  60. if($isWaterImage)https://img.gxlcms.com//https://img.gxlcms.com//图片水印
  61. {
  62. $w = $water_w;
  63. $h = $water_h;
  64. $label = "图片的";
  65. }
  66. elsehttps://img.gxlcms.com//https://img.gxlcms.com//文字水印
  67. {
  68. $temp = imagettfbbox(ceil($textFont*5),0,".https://img.gxlcms.com//cour.ttf",$waterText);https://img.gxlcms.com//https://img.gxlcms.com//取得使用 TrueType 字体的文本的范围
  69. $w = $temp[2] - $temp[6];
  70. $h = $temp[3] - $temp[7];
  71. unset($temp);
  72. $label = "文字区域";
  73. }
  74. if( ($ground_w<$w) || ($ground_h<$h) )
  75. {
  76. echo "需要加水印的图片的长度或宽度比水印".$label."还小，无法生成水印！";
  77. return;
  78. }
  79. switch($waterPos)
  80. {
  81. case 0:https://img.gxlcms.com//https://img.gxlcms.com//随机
  82. $posX = rand(0,($ground_w - $w));
  83. $posY = rand(0,($ground_h - $h));
  84. break;
  85. case 1:https://img.gxlcms.com//https://img.gxlcms.com//1为顶端居左
  86. $posX = 0;
  87. $posY = 0;
  88. break;
  89. case 2:https://img.gxlcms.com//https://img.gxlcms.com//2为顶端居中
  90. $posX = ($ground_w - $w) https://img.gxlcms.com// 2;
  91. $posY = 0;
  92. break;
  93. case 3:https://img.gxlcms.com//https://img.gxlcms.com//3为顶端居右
  94. $posX = $ground_w - $w;
  95. $posY = 0;
  96. break;
  97. case 4:https://img.gxlcms.com//https://img.gxlcms.com//4为中部居左
  98. $posX = 0;
  99. $posY = ($ground_h - $h) https://img.gxlcms.com// 2;
  100. break;
  101. case 5:https://img.gxlcms.com//https://img.gxlcms.com//5为中部居中
  102. $posX = ($ground_w - $w) https://img.gxlcms.com// 2;
  103. $posY = ($ground_h - $h) https://img.gxlcms.com// 2;
  104. break;
  105. case 6:https://img.gxlcms.com//https://img.gxlcms.com//6为中部居右
  106. $posX = $ground_w - $w;
  107. $posY = ($ground_h - $h) https://img.gxlcms.com// 2;
  108. break;
  109. case 7:https://img.gxlcms.com//https://img.gxlcms.com//7为底端居左
  110. $posX = 0;
  111. $posY = $ground_h - $h;
  112. break;
  113. case 8:https://img.gxlcms.com//https://img.gxlcms.com//8为底端居中
  114. $posX = ($ground_w - $w) https://img.gxlcms.com// 2;
  115. $posY = $ground_h - $h;
  116. break;
  117. case 9:https://img.gxlcms.com//https://img.gxlcms.com//9为底端居右
  118. $posX = $ground_w - $w;
  119. $posY = $ground_h - $h;
  120. break;
  121. default:https://img.gxlcms.com//https://img.gxlcms.com//随机
  122. $posX = rand(0,($ground_w - $w));
  123. $posY = rand(0,($ground_h - $h));
  124. break;
  125. }
  126. https://img.gxlcms.com//https://img.gxlcms.com//设定图像的混色模式
  127. imagealphablending($ground_im, true);
  128. if($isWaterImage)https://img.gxlcms.com//https://img.gxlcms.com//图片水印
  129. {
  130. imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);https://img.gxlcms.com//https://img.gxlcms.com//拷贝水印到目标文件
  131. }
  132. elsehttps://img.gxlcms.com//https://img.gxlcms.com//文字水印
  133. {
  134. if( !empty($textColor) && (strlen($textColor)==7) )
  135. {
  136. $R = hexdec(substr($textColor,1,2));
  137. $G = hexdec(substr($textColor,3,2));
  138. $B = hexdec(substr($textColor,5));
  139. }
  140. else
  141. {
  142. die("水印文字颜色格式不正确！");
  143. }
  144. imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
  145. }
  146. https://img.gxlcms.com//https://img.gxlcms.com//生成水印后的图片
  147. @unlink($groundImage);
  148. switch($ground_info[2])https://img.gxlcms.com//https://img.gxlcms.com//取得背景图片的格式
  149. {
  150. case 1:imagegif($ground_im,$groundImage);break;
  151. case 2:imagejpeg($ground_im,$groundImage);break;
  152. case 3:imagepng($ground_im,$groundImage);break;
  153. default:die($errorMsg);
  154. }
  156. https://img.gxlcms.com//https://img.gxlcms.com//释放内存
  157. if(isset($water_info)) unset($water_info);
  158. if(isset($water_im)) imagedestroy($water_im);
  159. unset($ground_info);
  160. imagedestroy($ground_im);
  161. }
  162. $uploadfile="your_picture.jpg"; https://img.gxlcms.com//https://img.gxlcms.com//待处理的背景图片位置
  163. $waterImage="Hat.png"; https://img.gxlcms.com//https://img.gxlcms.com//透明图片位置
  164. imageWaterMark($uploadfile,9,$waterImage);
  165. https://img.gxlcms.com//https://img.gxlcms.com//在web上显示出来
  166. echo "";
  167. ?>

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