php GIF 打水印

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include ‘Timagick.class.php‘;

$image = new Timagick();

$image->open(‘a.gif‘);
$image->resize_to(100, 100, ‘scale_fill‘);
$image->add_text(‘1024i.com‘, 10, 20);
$image->add_watermark(‘1024i.gif‘, 10, 50);
$image->save_to(‘x.gif‘);

<?php

/*
@版本日期: 版本日期: 2012年1月18日
@著作权所有: 1024 intelligence ( http://www.1024i.com )

获得使用本类库的许可, 您必须保留著作权声明信息.
报告漏洞，意见或建议, 请联系 Lou Barnes(iua1024@gmail.com)
*/


class Timagick
{
  private $image = null;
  private $type = null;

  // 构造函数
  public function __construct(){}


  // 析构函数
  public function __destruct()
  {
      if($this->image!==null) $this->image->destroy(); 
  }

  // 载入图像
  public function open($path)
  {
    $this->image = new Imagick( $path );
    if($this->image)
    {
        $this->type = strtolower($this->image->getImageFormat());
    }
    return $this->image;
  }
  

  public function crop($x=0, $y=0, $width=null, $height=null)
  {
      if($width==null) $width = $this->image->getImageWidth()-$x;
      if($height==null) $height = $this->image->getImageHeight()-$y;
      if($width<=0 || $height<=0) return;
      
      if($this->type==‘gif‘)
      {
            $image = $this->image;
          $canvas = new Imagick();
          
          $images = $image->coalesceImages();
          foreach($images as $frame){
              $img = new Imagick();
              $img->readImageBlob($frame);
                $img->cropImage($width, $height, $x, $y);

                $canvas->addImage( $img );
                $canvas->setImageDelay( $img->getImageDelay() );
                $canvas->setImagePage($width, $height, 0, 0);
            }
            
            $image->destroy();
          $this->image = $canvas;
      }
      else
      {
          $this->image->cropImage($width, $height, $x, $y);
      }
  }

  /*
  * 更改图像大小
  $fit: 适应大小方式
  ‘force‘: 把图片强制变形成 $width X $height 大小
  ‘scale‘: 按比例在安全框 $width X $height 内缩放图片, 输出缩放后图像大小 不完全等于 $width X $height
  ‘scale_fill‘: 按比例在安全框 $width X $height 内缩放图片，安全框内没有像素的地方填充色, 使用此参数时可设置背景填充色 $bg_color = array(255,255,255)(红,绿,蓝, 透明度) 透明度(0不透明-127完全透明))
  其它: 智能模能 缩放图像并载取图像的中间部分 $width X $height 像素大小
  $fit = ‘force‘,‘scale‘,‘scale_fill‘ 时： 输出完整图像
  $fit = 图像方位值 时, 输出指定位置部分图像 
  字母与图像的对应关系如下:
  
  north_west   north   north_east
  
  west         center        east
  
  south_west   south   south_east
  
  */
  public function resize_to($width = 100, $height = 100, $fit = ‘center‘, $fill_color = array(255,255,255,0) )
  {
      
      switch($fit)
      {
          case ‘force‘:
              if($this->type==‘gif‘)
              {
                  $image = $this->image;
                  $canvas = new Imagick();
                  
                  $images = $image->coalesceImages();
                  foreach($images as $frame){
                      $img = new Imagick();
                      $img->readImageBlob($frame);
                        $img->thumbnailImage( $width, $height, false );

                        $canvas->addImage( $img );
                        $canvas->setImageDelay( $img->getImageDelay() );
                    }
                    $image->destroy();
                  $this->image = $canvas;
              }
              else
              {
                  $this->image->thumbnailImage( $width, $height, false );
              }
              break;
          case ‘scale‘:
              if($this->type==‘gif‘)
              {
                  $image = $this->image;
                  $images = $image->coalesceImages();
                  $canvas = new Imagick();
                  foreach($images as $frame){
                      $img = new Imagick();
                      $img->readImageBlob($frame);
                        $img->thumbnailImage( $width, $height, true );

                        $canvas->addImage( $img );
                        $canvas->setImageDelay( $img->getImageDelay() );
                    }
                    $image->destroy();
                  $this->image = $canvas;
              }
              else
              {
                  $this->image->thumbnailImage( $width, $height, true );
              }
              break;
          case ‘scale_fill‘:
              $size = $this->image->getImagePage(); 
              $src_width = $size[‘width‘];
              $src_height = $size[‘height‘];
              
                $x = 0;
                $y = 0;
                
                $dst_width = $width;
                $dst_height = $height;

          if($src_width*$height > $src_height*$width)
        {
          $dst_height = intval($width*$src_height/$src_width);
          $y = intval( ($height-$dst_height)/2 );
        }
        else
        {
          $dst_width = intval($height*$src_width/$src_height);
          $x = intval( ($width-$dst_width)/2 );
        }

                $image = $this->image;
                $canvas = new Imagick();
                
                $color = ‘rgba(‘.$fill_color[0].‘,‘.$fill_color[1].‘,‘.$fill_color[2].‘,‘.$fill_color[3].‘)‘;
              if($this->type==‘gif‘)
              {
                  $images = $image->coalesceImages();
                  foreach($images as $frame)
                  {
                      $frame->thumbnailImage( $width, $height, true );

                      $draw = new ImagickDraw();
                        $draw->composite($frame->getImageCompose(), $x, $y, $dst_width, $dst_height, $frame);

                        $img = new Imagick();
                        $img->newImage($width, $height, $color, ‘gif‘);
                        $img->drawImage($draw);

                        $canvas->addImage( $img );
                        $canvas->setImageDelay( $img->getImageDelay() );
                        $canvas->setImagePage($width, $height, 0, 0);
                    }
              }
              else
              {
                  $image->thumbnailImage( $width, $height, true );
                  
                  $draw = new ImagickDraw();
                    $draw->composite($image->getImageCompose(), $x, $y, $dst_width, $dst_height, $image);
                    
                  $canvas->newImage($width, $height, $color, $this->get_type() );
                    $canvas->drawImage($draw);
                    $canvas->setImagePage($width, $height, 0, 0);
              }
              $image->destroy();
              $this->image = $canvas;
              break;
      default:
        $size = $this->image->getImagePage(); 
          $src_width = $size[‘width‘];
              $src_height = $size[‘height‘];
              
                $crop_x = 0;
                $crop_y = 0;
                
                $crop_w = $src_width;
                $crop_h = $src_height;
                
            if($src_width*$height > $src_height*$width)
        {
          $crop_w = intval($src_height*$width/$height);
        }
        else
        {
            $crop_h = intval($src_width*$height/$width);
        }
                
          switch($fit)
              {
            case ‘north_west‘:
                $crop_x = 0;
                $crop_y = 0;
                break;
              case ‘north‘:
                  $crop_x = intval( ($src_width-$crop_w)/2 );
                  $crop_y = 0;
                  break;
              case ‘north_east‘:
                  $crop_x = $src_width-$crop_w;
                  $crop_y = 0;
                  break;
              case ‘west‘:
                  $crop_x = 0;
                  $crop_y = intval( ($src_height-$crop_h)/2 );
                  break;
              case ‘center‘:
                  $crop_x = intval( ($src_width-$crop_w)/2 );
                  $crop_y = intval( ($src_height-$crop_h)/2 );
                  break;
              case ‘east‘:
                  $crop_x = $src_width-$crop_w;
                  $crop_y = intval( ($src_height-$crop_h)/2 );
                  break;
              case ‘south_west‘:
                  $crop_x = 0;
                  $crop_y = $src_height-$crop_h;
                  break;
              case ‘south‘:
                  $crop_x = intval( ($src_width-$crop_w)/2 );
                  $crop_y = $src_height-$crop_h;
                  break;
              case ‘south_east‘:
                  $crop_x = $src_width-$crop_w;
                  $crop_y = $src_height-$crop_h;
                  break;
              default:
                  $crop_x = intval( ($src_width-$crop_w)/2 );
                  $crop_y = intval( ($src_height-$crop_h)/2 );
              }
              
              $image = $this->image;
              $canvas = new Imagick();
              
            if($this->type==‘gif‘)
              {
                  $images = $image->coalesceImages();
                  foreach($images as $frame){
                      $img = new Imagick();
                      $img->readImageBlob($frame);
                        $img->cropImage($crop_w, $crop_h, $crop_x, $crop_y);
                        $img->thumbnailImage( $width, $height, true );
                        
                        $canvas->addImage( $img );
                        $canvas->setImageDelay( $img->getImageDelay() );
                        $canvas->setImagePage($width, $height, 0, 0);
                    }
              }
              else
              {
                  $image->cropImage($crop_w, $crop_h, $crop_x, $crop_y);
                  $image->thumbnailImage( $width, $height, true );
                  $canvas->addImage( $image );
                  $canvas->setImagePage($width, $height, 0, 0);
              }
              $image->destroy();
              $this->image = $canvas;
      }
      
  }
  

  

  // 添加水印图片
  public function add_watermark($path, $x = 0, $y = 0)
  {
        $watermark = new Imagick($path);
        $draw = new ImagickDraw();
        $draw->composite($watermark->getImageCompose(), $x, $y, $watermark->getImageWidth(), $watermark->getimageheight(), $watermark);

      if($this->type==‘gif‘)
      {
          $image = $this->image;
          $canvas = new Imagick();
          $images = $image->coalesceImages();
          foreach($image as $frame)
          {
                $img = new Imagick();
                $img->readImageBlob($frame);
                $img->drawImage($draw);
                
                $canvas->addImage( $img );
                $canvas->setImageDelay( $img->getImageDelay() );
            }
            $image->destroy();
          $this->image = $canvas;
      }
      else
      {
          $this->image->drawImage($draw);
      }
  }

  
  // 添加水印文字
  public function add_text($text, $x = 0 , $y = 0, $angle=0, $style=array())
  {
        $draw = new ImagickDraw();
        if(isset($style[‘font‘])) $draw->setFont($style[‘font‘]);
        if(isset($style[‘font_size‘])) $draw->setFontSize($style[‘font_size‘]);
      if(isset($style[‘fill_color‘])) $draw->setFillColor($style[‘fill_color‘]);
      if(isset($style[‘under_color‘])) $draw->setTextUnderColor($style[‘under_color‘]);
      
      if($this->type==‘gif‘)
      {
          foreach($this->image as $frame)
          {
              $frame->annotateImage($draw, $x, $y, $angle, $text);
          }
      }
      else
      {
          $this->image->annotateImage($draw, $x, $y, $angle, $text);
      }
  }
  
  
  // 保存到指定路径
  public function save_to( $path )
  {
      if($this->type==‘gif‘)
      {
          $this->image->writeImages($path, true);
      }
      else
      {
          $this->image->writeImage($path);
      }
  }

  // 输出图像
  public function output($header = true)
  {
      if($header) header(‘Content-type: ‘.$this->type);
      echo $this->image->getImagesBlob();   
  }

  
  public function get_width()
  {
        $size = $this->image->getImagePage(); 
        return $size[‘width‘];
  }
  
  public function get_height()
  {
      $size = $this->image->getImagePage(); 
        return $size[‘height‘];
  }

  // 设置图像类型， 默认与源类型一致
  public function set_type( $type=‘png‘ )
  {
      $this->type = $type;
        $this->image->setImageFormat( $type );
  }

  // 获取源图像类型
  public function get_type()
  {
    return $this->type;
  }


  // 当前对象是否为图片
  public function is_image()
  {
    if( $this->image )
      return true;
    else
      return false;
  }
  


  public function thumbnail($width = 100, $height = 100, $fit = true){ $this->image->thumbnailImage( $width, $height, $fit );} // 生成缩略图 $fit为真时将保持比例并在安全框 $width X $height 内生成缩略图片

  /*
  添加一个边框
  $width: 左右边框宽度
  $height: 上下边框宽度
  $color: 颜色: RGB 颜色 ‘rgb(255,0,0)‘ 或 16进制颜色 ‘#FF0000‘ 或颜色单词 ‘white‘/‘red‘...
  */
  public function border($width, $height, $color=‘rgb(220, 220, 220)‘)
  {
    $color=new ImagickPixel();
    $color->setColor($color);
    $this->image->borderImage($color, $width, $height);
  }
  
  public function blur($radius, $sigma){$this->image->blurImage($radius, $sigma);} // 模糊
  public function gaussian_blur($radius, $sigma){$this->image->gaussianBlurImage($radius, $sigma);} // 高斯模糊
  public function motion_blur($radius, $sigma, $angle){$this->image->motionBlurImage($radius, $sigma, $angle);} // 运动模糊
  public function radial_blur($radius){$this->image->radialBlurImage($radius);} // 径向模糊

  public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // 添加噪点
  
  public function level($black_point, $gamma, $white_point){$this->image->levelImage($black_point, $gamma, $white_point);} // 调整色阶
  public function modulate($brightness, $saturation, $hue){$this->image->modulateImage($brightness, $saturation, $hue);} // 调整亮度、饱和度、色调

  public function charcoal($radius, $sigma){$this->image->charcoalImage($radius, $sigma);} // 素描
  public function oil_paint($radius){$this->image->oilPaintImage($radius);} // 油画效果
  
  public function flop(){$this->image->flopImage();} // 水平翻转
  public function flip(){$this->image->flipImage();} // 垂直翻转

}

php GIF 打水印

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原文地址：http://my.oschina.net/qianglong/blog/295129