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!21 保留图片透明背景 

Merge pull request !21 from hakulamatata/master
feat/task1-c-wallet
Devil 2020-11-23 15:37:52 +08:00 committed by Gitee
parent d1be08fd23 5dd33243f4
commit c05853b0e6
1 changed files with 38 additions and 1 deletions
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39
extend/base/Images.php
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@ -319,17 +319,54 @@ class Images
/* 新建一个真彩色图像 */
$dst_im = imagecreatetruecolor($new_width, $new_height);
/* 是否裁剪图片 */
/* 保留透明背景 */
switch($type)
{
case 'gif':
case 'png':
/* 保存完整alpha通道信息 */
imagesavealpha($dst_im, true);
/* 上色 */
$color = imagecolorallocatealpha($dst_im, 0, 0, 0, 127);
/* 设置透明色 */
imagecolortransparent($dst_im, $color);
/* 填充透明色 */
imagefill($dst_im, 0, 0, $color);
break;
default:;
}
/* 是否裁剪图片 */
if($src_width > 0 && $src_height > 0)
{
/* 新建拷贝大小的真彩图像 */
$cpd_im = imagecreatetruecolor($src_width, $src_height);
/* 保留透明背景 */
switch($type)
{
case 'gif':
case 'png':
/* 保存完整alpha通道信息 */
imagesavealpha($cpd_im, true);
/* 上色 */
$color = imagecolorallocatealpha($cpd_im, 0, 0, 0, 127);
/* 设置透明色 */
imagecolortransparent($cpd_im, $color);
/* 填充透明色 */
imagefill($cpd_im, 0, 0, $color);
break;
default:;
}
/* 拷贝图片 */
imagecopy($cpd_im, $src_im, 0, 0, $src_x, $src_y, $src_width, $src_height);
/* 图片缩放 */
$s = imagecopyresampled($dst_im, $cpd_im, 0, 0, 0, 0, $new_width, $new_height, $src_width, $src_height);
/* 销毁画布 */
imagedestroy($cpd_im);
} else {
/* 图片缩放 */
$s = imagecopyresampled($dst_im, $src_im, 0, 0, 0, 0, $new_width, $new_height, $w, $h);