我需要创建一个水印,将其应用到图片上并以不同的名称保存。当前脚本运行良好,但唯一的问题是我需要增加“示例文本”的大小并将背景从 black 更改为 white 。我尝试了不同的场景,改变了不透明度,但仍然无法改变背景颜色。
function watermark($imag_path, $photo_id) {
// Load the stamp and the photo to apply the watermark to
$im = imagecreatefromjpeg("$imag_path");
echo "imag_path is $imag_path and photoid is $photo_id";
// First we create our stamp image manually from GD
$stamp = imagecreatetruecolor(490, 20);
//$im = imagecreatefromjpeg("$photo_id");
imagestring($stamp, 5, 20, 2, 'sample text', 0xff0000);
// Set the margins for the stamp and get the height/width of the stamp image
$marge_right = 10;
$marge_bottom = 10;
$sx = imagesx($stamp);
$sy = imagesy($stamp);
// Merge the stamp onto our photo with an opacity (transparency) of 100%
imagecopymerge($im, $stamp, imagesx($im) - $sx - $marge_right, imagesy($im) - $sy - $marge_bottom, 0, 0, imagesx($stamp), imagesy($stamp), 100);
$new_photo_id = $photo_id . "sample.JPG";
// Save the image to file and free memory
imagejpeg($im, "tmp/$new_photo_id");
imagedestroy($im);
}