使用 PHP 旋转 PNG 图像。如何去除原稿周围的黑线？

发布于 2024-11-06 01:12:52 字数 741 浏览 1 评论 0原文

我正在使用 PHP 旋转具有透明背景的 PNG 图像。但无论我如何尝试，原始图像周围仍然存在一些黑线。

怎样去掉黑线。其他一切都很好。图像是透明的，图像被旋转，新的角也是透明的。只是原始正方形（旋转后）周围的黑线让我很恼火。

我使用这段代码：

$angle = -100;
header('Content-type: image/png');  

$image = 'http://mapning.com/img/plane.png';
$file = imagecreatefrompng($image);

$rotate = imagerotate($file, $angle, 0);


imageSaveAlpha($rotate, true);
ImageAlphaBlending($rotate, false);

$transparentColor = imagecolorallocatealpha($rotate, 200, 200, 200, 127);
imagefill($rotate, 0, 0, $transparentColor);

imagepng($rotate);

我在这里找到了答案：

https://www .php.net/manual/en/function.imagerotate.php#47985

原文

I am using PHP to rotate an PNG image, with a transparant background. But whatever I try, there are still some black lines around the original image.

How do I remove the black lines. Everything else works fine. The image is transparant, the image is rotated, the new corners are also transparant. Just the black lines around the original square (which is rotated) are annoying me.

I use this code:

$angle = -100;
header('Content-type: image/png');  

$image = 'http://mapning.com/img/plane.png';
$file = imagecreatefrompng($image);

$rotate = imagerotate($file, $angle, 0);


imageSaveAlpha($rotate, true);
ImageAlphaBlending($rotate, false);

$transparentColor = imagecolorallocatealpha($rotate, 200, 200, 200, 127);
imagefill($rotate, 0, 0, $transparentColor);

imagepng($rotate);

I found my answer here:

https://www.php.net/manual/en/function.imagerotate.php#47985

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