代码如下：
<?php
class ThumbHandler {
var $dst_img; // 目标文件
var $h_src; // 图片资源句柄
var $h_dst; // 新图句柄
var $h_mask; // 水印句柄
var $img_create_quality = 100; // 图片生成质量
var $img_display_quality = 80; // 图片显示质量,默认为75
var $img_scale = 0; // 图片缩放比例
var $src_w = 0; // 原图宽度
var $src_h = 0; // 原图高度
var $dst_w = 0; // 新图总宽度
var $dst_h = 0; // 新图总高度
var $fill_w; // 填充图形宽
var $fill_h; // 填充图形高
var $copy_w; // 拷贝图形宽
var $copy_h; // 拷贝图形高
var $src_x = 0; // 原图绘制起始横坐标
var $src_y = 0; // 原图绘制起始纵坐标
var $start_x; // 新图绘制起始横坐标
var $start_y; // 新图绘制起始纵坐标
var $mask_word; // 水印文字
var $mask_img; // 水印图片
var $mask_pos_x = 0; // 水印横坐标
var $mask_pos_y = 0; // 水印纵坐标
var $mask_offset_x = 5; // 水印横向偏移
var $mask_offset_y = 5; // 水印纵向偏移
var $font_w; // 水印字体宽
var $font_h; // 水印字体高
var $mask_w; // 水印宽
var $mask_h; // 水印高
var $mask_font_color = "#ffffff"; // 水印文字颜色
var $mask_font = 2; // 水印字体
var $font_size; // 尺寸
var $mask_position = 0; // 水印位置
var $mask_img_pct = 50; // 图片合并程度,值越大，合并程序越低
var $mask_txt_pct = 50; // 文字合并程度,值越小，合并程序越低
var $img_border_size = 0; // 图片边框尺寸
var $img_border_color; // 图片边框颜色
var $_flip_x = 0; // 水平翻转次数
var $_flip_y = 0; // 垂直翻转次数
var $cut_type = 0; // 剪切类型
var $img_type; // 文件类型
// 文件类型定义,并指出了输出图片的函数
var $all_type = array ("jpg" => array ("output" => "imagejpeg" ), "gif" => array ("output" => "imagegif" ), "png" => array ("output" => "imagepng" ), "wbmp" => array ("output" => "image2wbmp" ), "jpeg" => array ("output" => "imagejpeg" ) );
/**
* 构造函数
*/
function ThumbHandler() {
$this->mask_font_color = "#ffffff";
$this->font = 2;
$this->font_size = 12;
}
/**
* 取得图片的宽
*/
function getImgWidth($src) {
return imagesx ( $src );
}
/**
* 取得图片的高
*/
function getImgHeight($src) {
return imagesy ( $src );
}
/**
* 设置图片生成路径
*
* @param string $src_img 图片生成路径
*/
function setSrcImg($src_img, $img_type = null) {
echo $img_type;
if (! file_exists ( $src_img )) {
die ( "图片不存在" );
}
if (! empty ( $img_type )) {
$this->img_type = $img_type;
} else {
$this->img_type = $this->_getImgType ( $src_img );
}
$this->_checkValid ( $this->img_type );
// file_get_contents函数要求php版本>4.3.0
$src = '';
if (function_exists ( "file_get_contents" )) {
$src = file_get_contents ( $src_img );
} else {
$handle = fopen ( $src_img, "r" );
while ( ! feof ( $handle ) ) {
$src .= fgets ( $fd, 4096 );
}
fclose ( $handle );
}
if (empty ( $src )) {
die ( "图片源为空" );
}
$this->h_src = @ImageCreateFromString ( $src );
$this->src_w = $this->getImgWidth ( $this->h_src );
$this->src_h = $this->getImgHeight ( $this->h_src );
}
/**
* 设置图片生成路径
*
* @param string $dst_img 图片生成路径
*/
function setDstImg($dst_img) {
$arr = explode ( '/', $dst_img );
$last = array_pop ( $arr );
$path = implode ( '/', $arr );
$this->_mkdirs ( $path );
$this->dst_img = $dst_img;
}
/**
* 设置图片的显示质量
*
* @param string $n 质量
*/
function setImgDisplayQuality($n) {
$this->img_display_quality = ( int ) $n;
}
/**
* 设置图片的生成质量
*
* @param string $n 质量
*/
function setImgCreateQuality($n) {
$this->img_create_quality = ( int ) $n;
}
/**
* 设置文字水印
*
* @param string $word 水印文字
* @param integer $font 水印字体
* @param string $color 水印字体颜色
*/
function setMaskWord($word) {
$this->mask_word .= $word;
}
/**
* 设置字体颜色
*
* @param string $color 字体颜色
*/
function setMaskFontColor($color = "#ffffff") {
$this->mask_font_color = $color;
}
/**
* 设置水印字体
*
* @param string|integer $font 字体
*/
function setMaskFont($font = 2) {
if (! is_numeric ( $font ) && ! file_exists ( $font )) {
die ( "字体文件不存在" );
}
$this->font = $font;
}
/**
* 设置文字字体大小,仅对truetype字体有效
*/
function setMaskFontSize($size = "12") {
$this->font_size = $size;
}
/**
* 设置图片水印
*
* @param string $img 水印图片源
*/
function setMaskImg($img) {
$this->mask_img = $img;
}
/**
* 设置水印横向偏移
*
* @param integer $x 横向偏移量
*/
function setMaskOffsetX($x) {
$this->mask_offset_x = ( int ) $x;
}
/**
* 设置水印纵向偏移
*
* @param integer $y 纵向偏移量
*/
function setMaskOffsetY($y) {
$this->mask_offset_y = ( int ) $y;
}
/**
* 指定水印位置
*
* @param integer $position 位置,1:左上,2:左下,3:右上,0/4:右下
*/
function setMaskPosition($position = 0) {
$this->mask_position = ( int ) $position;
}
/**
* 设置图片合并程度
*
* @param integer $n 合并程度
*/
function setMaskImgPct($n) {
$this->mask_img_pct = ( int ) $n;
}
/**
* 设置文字合并程度
*
* @param integer $n 合并程度
*/
function setMaskTxtPct($n) {
$this->mask_txt_pct = ( int ) $n;
}
/**
* 设置缩略图边框
*
* @param (类型) (参数名) (描述)
*/
function setDstImgBorder($size = 1, $color = "#000000") {
$this->img_border_size = ( int ) $size;
$this->img_border_color = $color;
}
/**
* 水平翻转
*/
function flipH() {
$this->_flip_x ++;
}
/**
* 垂直翻转
*/
function flipV() {
$this->_flip_y ++;
}
/**
* 设置剪切类型
*
* @param (类型) (参数名) (描述)
*/
function setCutType($type) {
$this->cut_type = ( int ) $type;
}
/**
* 设置图片剪切
*
* @param integer $width 矩形剪切
*/
function setRectangleCut($width, $height) {
$this->fill_w = ( int ) $width;
$this->fill_h = ( int ) $height;
}
/**
* 设置源图剪切起始坐标点
*
* @param (类型) (参数名) (描述)
*/
function setSrcCutPosition($x, $y) {
$this->src_x = ( int ) $x;
$this->src_y = ( int ) $y;
}
/**
* 创建图片,主函数
* @param integer $a 当缺少第二个参数时，此参数将用作百分比，
* 否则作为宽度值
* @param integer $b 图片缩放后的高度
*/
function createImg($a, $b = null) {
$num = func_num_args ();
if (1 == $num) {
$r = ( int ) $a;
if ($r < 1) {
die ( "图片缩放比例不得小于1" );
}
$this->img_scale = $r;
$this->_setNewImgSize ( $r );
}
if (2 == $num) {
$w = ( int ) $a;
$h = ( int ) $b;
if (0 == $w) {
die ( "目标宽度不能为0" );
}
if (0 == $h) {
die ( "目标高度不能为0" );
}
$this->_setNewImgSize ( $w, $h );
}
if ($this->_flip_x % 2 != 0) {
$this->_flipH ( $this->h_src );
}
if ($this->_flip_y % 2 != 0) {
$this->_flipV ( $this->h_src );
}
$this->_createMask ();
$this->_output ();
// 释放
if (imagedestroy ( $this->h_src ) && imagedestroy ( $this->h_dst )) {
Return true;
} else {
Return false;
}
}
/**
* 生成水印,调用了生成水印文字和水印图片两个方法
*/
function _createMask() {
if ($this->mask_word) {
// 获取字体信息
$this->_setFontInfo ();
if ($this->_isFull ()) {
die ( "水印文字过大" );
} else {
$this->h_dst = imagecreatetruecolor ( $this->dst_w, $this->dst_h );
$white = ImageColorAllocate ( $this->h_dst, 255, 255, 255 );
imagefilledrectangle ( $this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white ); // 填充背景色
$this->_drawBorder ();
imagecopyresampled ( $this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h );
$this->_createMaskWord ( $this->h_dst );
}
}
if ($this->mask_img) {
$this->_loadMaskImg (); //加载时，取得宽高
if ($this->_isFull ()) {
// 将水印生成在原图上再拷
$this->_createMaskImg ( $this->h_src );
$this->h_dst = imagecreatetruecolor ( $this->dst_w, $this->dst_h );
$white = ImageColorAllocate ( $this->h_dst, 255, 255, 255 );
imagefilledrectangle ( $this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white ); // 填充背景色
$this->_drawBorder ();
imagecopyresampled ( $this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->start_y, $this->copy_w, $this->copy_h );
} else {
// 创建新图并拷贝
$this->h_dst = imagecreatetruecolor ( $this->dst_w, $this->dst_h );
$white = ImageColorAllocate ( $this->h_dst, 255, 255, 255 );
imagefilledrectangle ( $this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white ); // 填充背景色
$this->_drawBorder ();
imagecopyresampled ( $this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h );
$this->_createMaskImg ( $this->h_dst );
}
}
if (empty ( $this->mask_word ) && empty ( $this->mask_img )) {
$this->h_dst = imagecreatetruecolor ( $this->dst_w, $this->dst_h );
$white = ImageColorAllocate ( $this->h_dst, 255, 255, 255 );
imagefilledrectangle ( $this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white ); // 填充背景色
$this->_drawBorder ();
imagecopyresampled ( $this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h );
}
}
/**
* 画边框
*/
function _drawBorder() {
if (! empty ( $this->img_border_size )) {
$c = $this->_parseColor ( $this->img_border_color );
$color = ImageColorAllocate ( $this->h_src, $c [0], $c [1], $c [2] );
imagefilledrectangle ( $this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $color ); // 填充背景色
}
}
/**
* 生成水印文字
*/
function _createMaskWord($src) {
$this->_countMaskPos ();
$this->_checkMaskValid ();
$c = $this->_parseColor ( $this->mask_font_color );
$color = imagecolorallocatealpha ( $src, $c [0], $c [1], $c [2], $this->mask_txt_pct );
if (is_numeric ( $this->font )) {
imagestring ( $src, $this->font, $this->mask_pos_x, $this->mask_pos_y, $this->mask_word, $color );
} else {
imagettftext ( $src, $this->font_size, 0, $this->mask_pos_x, $this->mask_pos_y, $color, $this->font, $this->mask_word );
}
}
/**
* 生成水印图
*/
function _createMaskImg($src) {
$this->_countMaskPos ();
$this->_checkMaskValid ();
imagecopymerge ( $src, $this->h_mask, $this->mask_pos_x, $this->mask_pos_y, 0, 0, $this->mask_w, $this->mask_h, $this->mask_img_pct );
imagedestroy ( $this->h_mask );
}
/**
* 加载水印图
*/
function _loadMaskImg() {
$mask_type = $this->_getImgType ( $this->mask_img );
$this->_checkValid ( $mask_type );
// file_get_contents函数要求php版本>4.3.0
$src = '';
if (function_exists ( "file_get_contents" )) {
$src = file_get_contents ( $this->mask_img );
} else {
$handle = fopen ( $this->mask_img, "r" );
while ( ! feof ( $handle ) ) {
$src .= fgets ( $fd, 4096 );
}
fclose ( $handle );
}
if (empty ( $this->mask_img )) {
die ( "水印图片为空" );
}
$this->h_mask = ImageCreateFromString ( $src );
$this->mask_w = $this->getImgWidth ( $this->h_mask );
$this->mask_h = $this->getImgHeight ( $this->h_mask );
}
/**
* 图片输出
*/
function _output() {
$img_type = $this->img_type;
$func_name = $this->all_type [$img_type] ['output'];
if (function_exists ( $func_name )) {
// 判断浏览器,若是IE就不发送头
if (isset ( $_SERVER ['HTTP_USER_AGENT'] )) {
$ua = strtoupper ( $_SERVER ['HTTP_USER_AGENT'] );
if (! preg_match ( '/^.*MSIE.*\)$/i', $ua )) {
header ( "Content-type:$img_type" );
}
}
$func_name ( $this->h_dst, $this->dst_img, $this->img_display_quality );
} else {
Return false;
}
}
/**
* 分析颜色
*
* @param string $color 十六进制颜色
*/
function _parseColor($color) {
$arr = array ();
for($ii = 1; $ii < strlen ( $color ); $ii ++) {
$arr [] = hexdec ( substr ( $color, $ii, 2 ) );
$ii ++;
}
Return $arr;
}
/**
* 计算出位置坐标
*/
function _countMaskPos() {
if ($this->_isFull ()) {
switch ($this->mask_position) {
case 1 :
// 左上
$this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
$this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
break;
case 2 :
// 左下
$this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
$this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
break;
case 3 :
// 右上
$this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
$this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
break;
case 4 :
// 右下
$this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
$this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
break;
default :
// 默认将水印放到右下,偏移指定像素
$this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
$this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
break;
}
} else {
switch ($this->mask_position) {
case 1 :
// 左上
$this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
$this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
break;
case 2 :
// 左下
$this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
$this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
break;
case 3 :
// 右上
$this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
$this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
break;
case 4 :
// 右下
$this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
$this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
break;
default :
// 默认将水印放到右下,偏移指定像素
$this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
$this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
break;
}
}
}
/**
* 设置字体信息
*/
function _setFontInfo() {
if (is_numeric ( $this->font )) {
$this->font_w = imagefontwidth ( $this->font );
$this->font_h = imagefontheight ( $this->font );
// 计算水印字体所占宽高
$word_length = strlen ( $this->mask_word );
$this->mask_w = $this->font_w * $word_length;
$this->mask_h = $this->font_h;
} else {
$arr = imagettfbbox ( $this->font_size, 0, $this->font, $this->mask_word );
$this->mask_w = abs ( $arr [0] - $arr [2] );
$this->mask_h = abs ( $arr [7] - $arr [1] );
}
}
/**
* 设置新图尺寸
*
* @param integer $img_w 目标宽度
* @param integer $img_h 目标高度
*/
function _setNewImgSize($img_w, $img_h = null) {
$num = func_num_args ();
if (1 == $num) {
$this->img_scale = $img_w; // 宽度作为比例
$this->fill_w = round ( $this->src_w * $this->img_scale / 100 ) - $this->img_border_size * 2;
$this->fill_h = round ( $this->src_h * $this->img_scale / 100 ) - $this->img_border_size * 2;
// 源文件起始坐标
$this->src_x = 0;
$this->src_y = 0;
$this->copy_w = $this->src_w;
$this->copy_h = $this->src_h;
// 目标尺寸
$this->dst_w = $this->fill_w + $this->img_border_size * 2;
$this->dst_h = $this->fill_h + $this->img_border_size * 2;
}
if (2 == $num) {
$fill_w = ( int ) $img_w - $this->img_border_size * 2;
$fill_h = ( int ) $img_h - $this->img_border_size * 2;
if ($fill_w < 0 || $fill_h < 0) {
die ( "图片边框过大，已超过了图片的宽度" );
}
$rate_w = $this->src_w / $fill_w;
$rate_h = $this->src_h / $fill_h;
switch ($this->cut_type) {
case 0 :
// 如果原图大于缩略图，产生缩小，否则不缩小
if ($rate_w < 1 && $rate_h < 1) {
$this->fill_w = ( int ) $this->src_w;
$this->fill_h = ( int ) $this->src_h;
} else {
if ($rate_w >= $rate_h) {
$this->fill_w = ( int ) $fill_w;
$this->fill_h = round ( $this->src_h / $rate_w );
} else {
$this->fill_w = round ( $this->src_w / $rate_h );
$this->fill_h = ( int ) $fill_h;
}
}
$this->src_x = 0;
$this->src_y = 0;
$this->copy_w = $this->src_w;
$this->copy_h = $this->src_h;
// 目标尺寸
$this->dst_w = $this->fill_w + $this->img_border_size * 2;
$this->dst_h = $this->fill_h + $this->img_border_size * 2;
break;
// 自动裁切
case 1 :
// 如果图片是缩小剪切才进行操作
if ($rate_w >= 1 && $rate_h >= 1) {
if ($this->src_w > $this->src_h) {
$src_x = round ( $this->src_w - $this->src_h ) / 2;
$this->setSrcCutPosition ( $src_x, 0 );
$this->setRectangleCut ( $fill_h, $fill_h );
$this->copy_w = $this->src_h;
$this->copy_h = $this->src_h;
} elseif ($this->src_w < $this->src_h) {
$src_y = round ( $this->src_h - $this->src_w ) / 2;
$this->setSrcCutPosition ( 0, $src_y );
$this->setRectangleCut ( $fill_w, $fill_h );
$this->copy_w = $this->src_w;
$this->copy_h = $this->src_w;
} else {
$this->setSrcCutPosition ( 0, 0 );
$this->copy_w = $this->src_w;
$this->copy_h = $this->src_w;
$this->setRectangleCut ( $fill_w, $fill_h );
}
} else {
$this->setSrcCutPosition ( 0, 0 );
$this->setRectangleCut ( $this->src_w, $this->src_h );
$this->copy_w = $this->src_w;
$this->copy_h = $this->src_h;
}
// 目标尺寸
$this->dst_w = $this->fill_w + $this->img_border_size * 2;
$this->dst_h = $this->fill_h + $this->img_border_size * 2;
break;
// 手工裁切
case 2 :
$this->copy_w = $this->fill_w;
$this->copy_h = $this->fill_h;
// 目标尺寸
$this->dst_w = $this->fill_w + $this->img_border_size * 2;
$this->dst_h = $this->fill_h + $this->img_border_size * 2;
break;
default :
break;
}
}
// 目标文件起始坐标
$this->start_x = $this->img_border_size;
$this->start_y = $this->img_border_size;
}
/**
* 检查水印图是否大于生成后的图片宽高
*/
function _isFull() {
Return ($this->mask_w + $this->mask_offset_x > $this->fill_w || $this->mask_h + $this->mask_offset_y > $this->fill_h) ? true : false;
}
/**
* 检查水印图是否超过原图
*/
function _checkMaskValid() {
if ($this->mask_w + $this->mask_offset_x > $this->src_w || $this->mask_h + $this->mask_offset_y > $this->src_h) {
die ( "水印图片尺寸大于原图，请缩小水印图" );
}
}
/**
* 取得图片类型
*
* @param string $file_path 文件路径
*/
function _getImgType($file_path) {
$type_list = array ("1" => "gif", "2" => "jpg", "3" => "png", "4" => "swf", "5" => "psd", "6" => "bmp", "15" => "wbmp" );
if (file_exists ( $file_path )) {
$img_info = @getimagesize ( $file_path );
if (isset ( $type_list [$img_info [2]] )) {
Return $type_list [$img_info [2]];
}
} else {
die ( "文件不存在,不能取得文件类型!" );
}
}
/**
* 检查图片类型是否合法,调用了array_key_exists函数，此函数要求
* php版本大于4.1.0
*
* @param string $img_type 文件类型
*/
function _checkValid($img_type) {
if (! array_key_exists ( $img_type, $this->all_type )) {
Return false;
}
}
/**
* 按指定路径生成目录
*
* @param string $path 路径
*/
function _mkdirs($path) {
$adir = explode ( '/', $path );
$dirlist = '';
$rootdir = array_shift ( $adir );
if (($rootdir != '.' || $rootdir != '..') && ! file_exists ( $rootdir )) {
@mkdir ( $rootdir );
}
foreach ( $adir as $key => $val ) {
if ($val != '.' && $val != '..') {
$dirlist .= "/" . $val;
$dirpath = $rootdir . $dirlist;
if (! file_exists ( $dirpath )) {
@mkdir ( $dirpath );
@chmod ( $dirpath, 0777 );
}
}
}
}
/**
* 垂直翻转
*
* @param string $src 图片源
*/
function _flipV($src) {
$src_x = $this->getImgWidth ( $src );
$src_y = $this->getImgHeight ( $src );
$new_im = imagecreatetruecolor ( $src_x, $src_y );
for($y = 0; $y < $src_y; $y ++) {
imagecopy ( $new_im, $src, 0, $src_y - $y - 1, 0, $y, $src_x, 1 );
}
$this->h_src = $new_im;
}
/**
* 水平翻转
*
* @param string $src 图片源
*/
function _flipH($src) {
$src_x = $this->getImgWidth ( $src );
$src_y = $this->getImgHeight ( $src );
$new_im = imagecreatetruecolor ( $src_x, $src_y );
for($x = 0; $x < $src_x; $x ++) {
imagecopy ( $new_im, $src, $src_x - $x - 1, 0, $x, 0, 1, $src_y );
}
$this->h_src = $new_im;
}
}?>
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本文链接地址: PHP版的图片水印类
转载请注明：26点的博客 » PHP版的图片水印类
