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HomeBackend DevelopmentPHP Tutorialphp imagick 扩张合成图片的两张方法

php imagick 扩展合成图片的两张方法


方法一:compositeimages

/**     *  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();    }



方法二:combineimages

/**     *  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();    }

个人认为方法二效率更高
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