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Support more types of image resizing

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기존에 지원하던 crop, ratio 외에 fill, stretch, center 옵션을 추가
This commit is contained in:
Kijin Sung 2021-01-19 17:23:43 +09:00
parent 015238d75f
commit 175b797ee1
1 changed files with 50 additions and 33 deletions
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83
classes/file/FileHandler.class.php
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@ -485,7 +485,7 @@ class FileHandler
* @param int $resize_width Width to resize
* @param int $resize_height Height to resize
* @param string $target_type If $target_type is set (gif, jpg, png, bmp), result image will be saved as target type
* @param string $thumbnail_type Thumbnail type(crop, ratio)
* @param string $thumbnail_type Thumbnail type(crop, ratio, stretch, fill, center)
* @param int $quality Compression ratio (0~100)
* @param int $rotate Rotation degrees (0~360)
* @return bool TRUE: success, FALSE: failed
@ -611,34 +611,19 @@ class FileHandler
// If resize not needed, skip thumbnail generation
if ($width == $resize_width && $height == $resize_height)
{
$resize_needed = false;
$thumb = &$source;
}
else
{
// if original image is larger than specified size to resize, calculate the ratio
$width_per = ($resize_width > 0 && $width >= $resize_width) ? $resize_width / $width : 1;
$height_per = ($resize_height > 0 && $height >= $resize_height) ? $resize_height / $height : 1;
$per = NULL;
if($thumbnail_type == 'ratio')
{
$per = ($width_per > $height_per) ? $height_per : $width_per;
$resize_width = $width * $per;
$resize_height = $height * $per;
}
else
{
$per = ($width_per < $height_per) ? $height_per : $width_per;
}
// create temporary image with target size
$resize_needed = true;
$thumb = imagecreatetruecolor($resize_width, $resize_height);
if(!$thumb)
if (!$thumb)
{
return FALSE;
return false;
}
if($target_type == 'png')
if ($target_type == 'png')
{
imagefill($thumb, 0, 0, imagecolorallocatealpha($thumb, 0, 0, 0, 127));
imagesavealpha($thumb, TRUE);
@ -648,20 +633,52 @@ class FileHandler
{
imagefilledrectangle($thumb, 0, 0, $resize_width - 1, $resize_height - 1, imagecolorallocate($thumb, 255, 255, 255));
}
// resize original image and put it into temporary image
$new_width = (int) ($width * $per);
$new_height = (int) ($height * $per);
$x = 0;
$y = 0;
if($thumbnail_type == 'crop')
}
// Resize the original image and copy it to a temporary image
if ($resize_needed)
{
// Calculate the size ratio
$ratio_x = ($resize_width > 0 && $width > 0) ? $resize_width / $width : 1;
$ratio_y = ($resize_height > 0 && $height > 0) ? $resize_height / $height : 1;
$ratio_max = max($ratio_x, $ratio_y);
$ratio_min = min($ratio_x, $ratio_y);
// Determine the X-Y coordinates to copy
switch ($thumbnail_type)
{
$x = (int) ($resize_width / 2 - $new_width / 2);
$y = (int) ($resize_height / 2 - $new_height / 2);
case 'stretch':
$dst_width = $resize_width;
$dst_height = $resize_height;
break;
case 'fill':
$dst_width = round($width * $ratio_max);
$dst_height = round($height * $ratio_max);
break;
case 'center':
$dst_width = $width;
$dst_height = $height;
break;
case 'ratio':
$dst_width = round($width * $ratio_min);
$dst_height = round($height * $ratio_min);
break;
case 'crop':
default:
$dst_width = round($width * min(1, $ratio_max));
$dst_height = round($height * min(1, $ratio_max));
}
imagecopyresampled($thumb, $source, $x, $y, 0, 0, $new_width, $new_height, $width, $height);
if (abs($resize_width - $dst_width) < ($resize_width * 0.02)) $dst_width = $resize_width;
if (abs($resize_height - $dst_height) < ($resize_height * 0.02)) $dst_height = $resize_height;
$dst_x = round(($resize_width - $dst_width) / 2);
$dst_y = round(($resize_height - $dst_height) / 2);
imagecopyresampled($thumb, $source, $dst_x, $dst_y, 0, 0, $dst_width, $dst_height, $width, $height);
}
// create directory