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TiledWatermark.class.php
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<?php
/**
* 文字图案水印平铺工具类
*
* @time 2017.02.16 23:26:33
* @author Joe
* @link https://tahenniu.com
*
*/
class TiledWatermark
{
private static $_instance;
private $use_size_array = true;
private $is_run = false;
private $horizontal = 0;
private $vertical = 0;
private $font_size = 12;
# 基础配置
private $all_config = array();
private function __construct()
{}
private function __clone()
{}
public static function getInstance()
{
if (!self::$_instance instanceof self)
{
self::$_instance = new self;
}
return self::$_instance;
}
/**
* mime类型 file ext
*
* @var array
*/
private static $mime_types = array(
2 => array('jpeg', '.jpg'),
3 => array('png', '.png')
);
/**
* size数组
*
* @var array
*
* 参数分别为：背景width范围,font-size,x以及y坐标位置偏移量
* 可根据实际使用情况调整以达到最佳显示效果
*/
private $size_array = array(
320 => array(12, 120, 55),
480 => array(13, 130, 60),
700 => array(14, 140, 80),
1200 => array(18, 180, 100),
1900 => array(26, 280, 120),
2500 => array(36, 430, 180),
3200 => array(52, 630, 260),
'max_size' => array(66, 730, 280)
);
/**
* 检查图片
*
*/
private function ckeckImage($image_path_type = 'bg')
{
# 检查图片
$this->image_type_name = $image_path_type =='bg' ? '背景' : 'logo';
$this->image_path = $image_path_type =='bg' ? $this->all_config['draw_bg'] : $this->all_config['logo_img'];
if(!$this->image_path || !is_file($this->image_path))
{
trigger_error($this->image_type_name .'图片不存在！"' . $image_path . '"', E_USER_ERROR);
}
# 图片数据，0 width, 1 height mime mime类型
$tmp_data = getimagesize($this->image_path);
# 检查图片尺寸
if(!isset($tmp_data[0]) || $tmp_data[0] < 1 || !isset($tmp_data[1]) || $tmp_data[1] < 1) {
trigger_error('路径：' . $this->image_path . '无效或已损毁的'.$this->image_type_name.'图片！');
}
# 检查图片类型
if(!isset($tmp_data[2]) || !isset(self::$mime_types[$tmp_data[2]][0])) {
trigger_error('路径：' . $this->image_path . '不被允许的'.$this->image_type_name.'图片类型！', E_USER_ERROR);
}
if ($this->image_type_name =='背景')
{
$this->tmp_data = getimagesize($this->all_config['draw_bg']);
list($this->img_w, $this->img_h) = $this->tmp_data;
}
else
{
$this->logo_tmp_data = getimagesize($this->all_config['logo_img']);
list($this->logo_w, $this->logo_h) = $this->logo_tmp_data;
}
}
/**
* 初始化
*/
private function initialize()
{
if(!$this->is_run)
{
$this->ckeckImage('bg');
# 是否已加载GD库
if(!function_exists('getimagesize'))
{
trigger_error(__CLASS__ . '运行依赖GD库，请检查扩展是否安装或加载！', E_USER_ERROR);
}
if($this->all_config['draw_type'] =='img')
{
# 检查logo文件
$this->ckeckImage('logo');
}
else
{
# 检查字体文件
if(!is_file($this->all_config['font_file'])) {
trigger_error('字体文件不存在！', E_USER_ERROR);
}
# 是否为水印设置了有效的RBG参数
if($this->all_config['text_rgb'] === null || strlen($this->all_config['text_rgb']) < 1)
{
# 设置水印默认RGB值
$this->all_config['text_rgb'] = 'x0b4';
}
# 是否为阴影设置了有效的RGB参数
if($this->all_config['shadow'])
{
if($this->all_config['shadow_rgb'] === null || strlen($this->all_config['shadow_rgb']) < 1)
{
# 默认阴影RGB
$this->all_config['shadow_rgb'] = '0x00';
}
}
# 检查水印文本
if(strlen($this->all_config['watermark_text']) < 1 || str_replace(' ','',$this->all_config['watermark_text']) =='')
{
trigger_error('无效的水印文字！', E_USER_ERROR);
}
}
# 可以开始绘制水印
$this->is_run = true;
}
}
/**
* RGB字符串转换为数组
*
* @param mixed $rgb_string
* @return array 0 red, 1 green, 2 blue.
*/
private function rgbStringToArray($rgb_string)
{
$rgb = array(
0 => null,
1 => null,
2 => null
);
# 单个值
if(strpos($rgb_string, ',') === false)
{
for($i = 0; $i < 3; $i++)
{
$rgb[$i] = $rgb_string;
}
}
# 多个值
else
{
$rgb_string = explode(',', $rgb_string);
if(count($rgb_string) == 3)
{
for($i = 0; $i < count($rgb_string); $i++)
{
$rgb[$i] = trim($rgb_string[$i]);
}
}
else
{
trigger_error('rgb参数不正确！', E_USER_ERROR);
}
}
return $rgb;
}
/**
* 计算标记水印
*
* @staticvar int $i
* @param array $points
* @param int $p
* @param int $max_x
* @return array
*/
private function markPoints($points = array(), $p = 20, $max_x = 0)
{
static $i = 0;
if(count($points) > 0) {
$i++;
$rand = rand(0, count($points) - 1);
if(isset($points[$rand]))
{
# 确保位置不超出范围
if(($points[$rand]['x'] < $max_x && $points[$rand]['y'] != $p && $points[$rand]['y'] < $max_x) || $i >= 100)
{
$points[$rand]['flag'] = true;
}
else
{
return $this->markPoints($points, $p, $max_x);
}
}
}
return $points;
}
/**
* 绘制水印
*
*/
public function okIsRun($config)
{
$this->all_config = $config;
$this->initialize();
# 使用尺寸数组
if(is_array($this->size_array) && count($this->size_array) > 0)
{
$img_max = $this->img_w > $this->img_h ? $this->img_w : $this->img_h;
$font_set = false;
foreach($this->size_array as $size => $v)
{
if($size !== 'max_size')
{
if($img_max < $size && isset($v[0]) && isset($v[1]))
{
$this->font_size = (int)$v[0];
$this->horizontal = (int)$v[1];
$this->vertical = (int)$v[2];
$font_set = true;
break;
}
}
}
# 设置最大尺寸
if(!$font_set && isset($this->size_array['max_size'][0]) && isset($this->size_array['max_size'][1]))
{
$this->font_size = (int)$this->size_array['max_size'][0];
$this->horizontal = (int)$this->size_array['max_size'][1];
$this->vertical = (int)$this->size_array['max_size'][1];
}
}
# png
if($this->tmp_data[2] == 3)
{
$img = imagecreatetruecolor($this->img_w, $this->img_h);
$img_source = imagecreatefrompng($this->all_config['draw_bg']);
imagecopyresampled($img, $img_source, 0, 0, 0, 0, $this->img_w, $this->img_h, $this->img_w, $this->img_h);
}
else
{
# 按需生成图像资源
$f = 'imagecreatefrom' . self::$mime_types[$this->tmp_data[2]][0];
$img = $f($this->all_config['draw_bg']);
}
# 设置水印颜色
$rgb = $this->rgbStringToArray($this->all_config['text_rgb']);
$rgb2 = $this->rgbStringToArray($this->all_config['shadow_rgb']);
# 如果设置透明度需要使用透明效果
if((int)$this->all_config['opacity'] > 0 && (int)$this->all_config['opacity'] <= 127)
{
$wm_color = imagecolorallocatealpha($img, $rgb[0], $rgb[1], $rgb[2], (int)$this->all_config['opacity']);
if($this->all_config['shadow'])
{
$wm_shadow_color = imagecolorallocatealpha($img, $rgb2[0], $rgb2[1], $rgb2[2], (int)$this->all_config['opacity']);
}
}
else
{
$wm_color = imagecolorallocate($img, $rgb[0], $rgb[1], $rgb[2]);
if($this->all_config['shadow'])
{
$wm_shadow_color = imagecolorallocate($img, $rgb2[0], $rgb2[1], $rgb2[2]);
}
}
# 生成绘制坐标点
$p = $this->all_config['random_location'] ? rand(10,100) : 25;
$i = $max_x = 0;
$points = array();
for($x = $p; $x < $this->img_w; $x += $this->horizontal)
{
if($x > $max_x)
{
$max_x = $x;
}
for($y = $p; $y < $this->img_h; $y += $this->vertical)
{
$points[$i] = array('x' => $x, 'y' => $y);
if($this->all_config['shadow'])
{
$points[$i]['x2'] = $x + $this->all_config['shadow_offset'];
$points[$i]['y2'] = $y + $this->all_config['shadow_offset'];
}
$i++;
}
}
switch ($this->all_config['draw_type'])
{
case 'txt':
foreach($points as $m)
{
if(isset($m['x2']) && isset($m['y2']))
{
# 绘制阴影
imagettftext($img, $this->font_size, $this->all_config['rotate_angle'], $m['x2'], $m['y2'],
$wm_shadow_color, $this->all_config['font_file'], $this->all_config['watermark_text']);
}
# 绘制水印
imagettftext($img, $this->font_size, $this->all_config['rotate_angle'], $m['x'], $m['y'], $wm_color,
$this->all_config['font_file'], $this->all_config['watermark_text']);
}
break;
case 'img':
$f = 'imagecreatefrom' . self::$mime_types[$this->logo_tmp_data[2]][0];
$logo_img = $f($this->all_config['logo_img']);
foreach($points as $m)
{
# 合并图像
imagecopy($img,$logo_img,$m['x'],$m['y'],0,0,$this->logo_w,$this->logo_h);
}
break;
default:
trigger_error('水印类型参数不正确！', E_USER_ERROR);
break;
}
if ($this->tmp_data[2] == 3 || (isset($this->logo_tmp_data[2]) && $this->logo_tmp_data[2] == 3))
{
$f = 'imagepng';
$o_ext = self::$mime_types[3][1];
}
else
{
$f = 'image' . self::$mime_types[$this->tmp_data[2]][0];
$o_ext = self::$mime_types[$this->tmp_data[2]][1];
}
if(isset($this->logo_tmp_data[2]) && $this->logo_tmp_data[2] == 3)
{
$this->out_image_mime = $this->logo_tmp_data['mime'];
}
else
{
$this->out_image_mime = $this->tmp_data['mime'];
}
# 输出图像
header('Content-type: '.$this->out_image_mime);
$f($img);
//$f($img, './resources/newfile'. $o_ext);
# 释放资源
if (isset($logo_img))
{
imagedestroy($logo_img);
}
imagedestroy($img);
}
}