[英]How to crop a verticaly and horizontaly centered version of an image?
我目前正在調整圖像尺寸,以保持寬高比為自定義:
class ImgResizer {
var $originalFile = '$newName';
function ImgResizer($originalFile = '$newName') {
$this -> originalFile = $originalFile;
}
function resize($newWidth, $targetFile) {
if (empty($newWidth) || empty($targetFile)) {
return false;
}
$src = imagecreatefromjpeg($this -> originalFile);
list($width, $height) = getimagesize($this -> originalFile);
$newHeight = ($height / $width) * $newWidth;
$tmp = imagecreatetruecolor($newWidth, $newHeight);
imagecopyresampled($tmp, $src, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
if (file_exists($targetFile)) {
unlink($targetFile);
}
imagejpeg($tmp, $targetFile, 95);
}
}
用法:
$work = new ImgResizer($path);
$work -> resize(200, $path);
但我想獲得200x200px的圖像版本。 並且它應該在垂直和水平居中的位置(基本上得到圖像的主要200px)
那可能嗎?
-編輯-
function resize($newWidth, $targetFile) {
if (empty($newWidth) || empty($targetFile)) {
return false;
}
$src = imagecreatefromjpeg($this -> originalFile);
list($width, $height) = getimagesize($this -> originalFile);
$newHeight = $newWidth;
if ($width > $newWidth){
$srcx = $width/2 - $newWidth/2;
$destx = 0;
}
else{
$srcx = 0;
$destx = $newWidth/2 - $width/2;
}
if ($height > $newHeight){
$srcy = $height/2 - $newHeight/2;
$desty = 0;
}
else{
$srcy = 0;
$desty = $newHeight/2 - $height/2;
}
$tmp = imagecreatetruecolor($newWidth, $newHeight);
imagecopyresampled($tmp, $src, $destx, $desty, $srcx, $srcy, $newWidth, $newHeight, $width, $height);
if (file_exists($targetFile)) {
unlink($targetFile);
}
imagejpeg($tmp, $targetFile, 95);
}
會產生意外情況: HTTP://209.51.221.243/integracion/files/uploads/1_050.JPG
: HTTP://209.51.221.243/integracion/files/uploads/1_050.JPG
嘗試
if ($width > $newWidth){
$srcx = $width/2 - $newWidth/2;
$destx = 0;
$w = $newWidth;
}
else{
$srcx = 0;
$destx = $newWidth/2 - $width/2;
$w = $width;
}
if ($height > $newHeight){
$srcy = $height/2 - $newHeight/2;
$desty = 0;
$h = $newHeight;
}
else{
$srcy = 0;
$desty = $newHeight/2 - $height/2;
$h = $keight;
}
imagecopyresampled($tmp, $src, $destx, $desty, $srcx, $srcy, $w, $h, $w, $h);
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