我正在使用PHP旋转和裁剪图像,但是我得到了显示黑色边框的结果。我知道可以更改背景颜色,但我想将图像旋转和裁剪到填满整个图像。基本上类似于CSS中的
background-size: cover;
(左侧)与background-size: contain;
(右侧) 。
请参见下面的图像,右侧是我现在得到的结果,左侧是我想要实现的效果。旋转的度数是动态的,要生成的图像和源图像都是正方形(200x200)。
编辑: 这是我的快速粗糙代码:
$rotate = imagecreatefromjpeg($image);
// part of code created by www.thewebhelp.com, modified
$square_size = 200;
$original_width = imagesx($rotate);
$original_height = imagesy($rotate);
if($original_width > $original_height){
$new_height = $square_size;
$new_width = $new_height*($original_width/$original_height);
}
if($original_height > $original_width){
$new_width = $square_size;
$new_height = $new_width*($original_height/$original_width);
}
if($original_height == $original_width){
$new_width = $square_size;
$new_height = $square_size;
}
$new_width = round($new_width);
$new_height = round($new_height);
$smaller_image = imagecreatetruecolor($new_width, $new_height);
$square_image = imagecreatetruecolor($square_size, $square_size);
imagecopyresampled($smaller_image, $rotate, 0, 0, 0, 0, $new_width, $new_height, $original_width, $original_height);
if($new_width>$new_height){
$difference = $new_width-$new_height;
$half_difference = round($difference/2);
imagecopyresampled($square_image, $smaller_image, 0-$half_difference+1, 0, 0, 0, $square_size+$difference, $square_size, $new_width, $new_height);
}
if($new_height>$new_width){
$difference = $new_height-$new_width;
$half_difference = round($difference/2);
imagecopyresampled($square_image, $smaller_image, 0, 0-$half_difference+1, 0, 0, $square_size, $square_size+$difference, $new_width, $new_height);
}
if($new_height == $new_width){
imagecopyresampled($square_image, $smaller_image, 0, 0, 0, 0, $square_size, $square_size, $new_width, $new_height);
}
$degrees = rand(1,360);
$square_image = imagerotate($square_image, $degrees, 0);
imagejpeg($square_image,NULL,100);
background-size
比喻与你所需求的不符。 - Ejaz