<?php
/**
 * 添加图片全屏水印
 * $sourcePath 源图片路径
 * $logoPath   水印logo路径
*  $savePath   添加水印后图片的保存路径
 */
function addImageWater($sourcePath,$logoPath,$savePath){
        $im = imagecreatefromstring(file_get_contents($sourcePath));
        //获取水印源
        $watermark = imagecreatefromstring(file_get_contents($logoPath));
        //获取图、水印 宽高类型
        list($bgWidth, $bgHight, $bgType) = getimagesize($sourcePath);
        list($logoWidth, $logoHight, $logoType) = getimagesize($logoPath);
        //定义平铺数据
        $x_length = $bgWidth - 1; //x轴总长度
        $y_length = $bgHight - 1; //y轴总长度
        //创建透明画布 伪白色
        $opacity=15;
        $w = imagesx($watermark);
        $h = imagesy($watermark);
        $cut = imagecreatetruecolor($w,$h);
        $white = imagecolorallocatealpha($cut, 255,255,255,0);
        imagefill( $cut, 0, 0, $white );
        //整合水印
        imagecopy($cut, $watermark, 0, 0, 0, 0, $w, $h);
        //循环平铺水印
        for ($x = 0; $x < $x_length; $x++)
        {
            for ($y = 0; $y < $y_length; $y++) {
                imagecopymerge($im, $cut, $x, $y, 0, 0, $logoWidth, $logoHight, $opacity);
                $y += $logoHight;
            }
            $x += $logoWidth;
        }
        //header("Content-type:image/png");
       // imagepng($im,$savePath);   //色彩还原度高，但是文件大
        imagejpeg($im,$savePath);
}

addImageWater('mmexport1689653536755.jpg','logo.png','2.jpg');
?>

# xiaoxiao [ 2023-07-18 ]

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# http://www.s7smile.com/php/55

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