PHP基于imagick扩展实现合成图片的两种方法【附imagick扩展下载】

/*** function: 合成图片* @param string   $output_url 图片保存路径* @param string   $img_type  图片保存类型* @param integral  $line_num  每行显示图片数量* @param array    $logo_info 每张待合成图片的信息（要求所有尺寸统一）* @param array    $img_list 待合成的图片绝对路径** @return void*/public function generate($output_url, $img_type, $line_num, $logo_info, $img_list=array()) {    //计算图片有多少行    $lines = ceil(count($img_list)/$line_num);    $bg_width = ($logo_info['width'] + $logo_info['line_width']) * $line_num;    $bg_height = ($logo_info['height'] + $logo_info['line_height']) * $lines;    //构建画布    $canvas = new Imagick();    $canvas->newimage($bg_width, $bg_height, 'white');    $canvas->setimageformat($img_type);    $i = $j = 0;    foreach ($img_list as $item) {      $im = new Imagick($item);      $x = $logo_info['line_width']*2 + $i * $logo_info['width'];      $y = $logo_info['line_height']*2 + $j * $logo_info['height'];      // $canvas->compositeimage($im -> getimage(), Imagick::COMPOSITE_OVER, $x, $y);      $canvas -> compositeimage($im, $im->getImageCompose(), $x, $y);      if (($i + 1) % $line_num === 0) {        $i = 0;        $j++;      } else {        $i++;      }      // unset($im);      $im -> destroy();    }    $canvas->writeimage($output_url);    //销毁对象    $canvas -> destroy();}

/*** function: 合成图片* @param string   $output_url 图片保存路径* @param string   $img_type  图片保存类型* @param integral  $line_num  每行显示图片数量* @param array    $logo_info 每张待合成图片的信息（要求所有尺寸统一）* @param array    $img_list 待合成的图片绝对路径** @return void*/public function generate($output_url, $img_type, $line_num, $logo_info, $img_list=array()) {    //计算图片有多少行    $lines = ceil(count($img_list)/$line_num);    $bg_width = ($logo_info['width'] + $logo_info['line_width']) * $line_num;    $bg_height = ($logo_info['height'] + $logo_info['line_height']) * $lines;    //构建画布    $canvas = null;    $canvas = new Imagick();    $canvas -> newimage($bg_width, $bg_height, 'white');    $i = $j = 0;    foreach ($img_list as $item) {      $im = null;      $im = new Imagick($item);      // $canvas -> readImage($item);      $canvas -> addimage($im);      $im -> clear();      $im -> destroy();    }    // $canvas -> flattenImages();    $canvas -> combineImages( Imagick::CHANNEL_ALL );    $canvas -> writeimage($output_url);    //销毁对象    $canvas -> clear();    $canvas -> destroy();}