我目前正在编写基于Uploadify的上传程序脚本。现在我调整给定的图像和水印的大小之一。这一切运作良好,但我需要脚本来调整高度,然后裁剪宽度,以便纵横比不会混乱。使用GD调整图像尺寸并保留长宽比
这是我到目前为止的代码:
if ($fileExtension == "jpg" ||
$fileExtension == "jpeg" ||
$fileExtension == "png" ||
$fileExtension == "gif"){
// GD variables:
list($width, $height, $type) = GetImageSize($uploadedFile['tmp_name']);
// Image sizes:
$bigImage = array(800, 453);
$mediumImage = array(410, 231);
$listImage = array(120, 68);
$thumbnail = array(90, 51);
$sourceAspect = $width/$height;
$bigAspect = $bigImage[0]/$bigImage[1];
$mediumAspect = $mediumImage[0]/$mediumImage[1];
$listAspect = $listImage[0]/$listImage[1];
$thumbnailAspect = $thumbnail[0]/$thumbnail[1];
// Image is PNG:
if ($type == IMAGETYPE_PNG){
$image = imagecreatefrompng($uploadedFile['tmp_name']);
$valid = true;
}
// Image is JPEG:
else if ($type == IMAGETYPE_JPEG){
$image = imagecreatefromjpeg($uploadedFile['tmp_name']);
$valid = true;
}
// Image is GIF:
else if ($type == IMAGETYPE_GIF){
$image = imagecreatefromgif($uploadedFile['tmp_name']);
$valid = true;
}
// Format not allowed:
else {
$valid = false;
}
// Start creating images:
if ($valid){
// Get size:
$imageSize = getimagesize($uploadedFile['tmp_name']);
// Generate canvas:
$bCanvas = imagecreatetruecolor($bigImage[0], $bigImage[1]);
$mCanvas = imagecreatetruecolor($mediumImage[0], $mediumImage[1]);
$lCanvas = imagecreatetruecolor($listImage[0], $listImage[1]);
$tCanvas = imagecreatetruecolor($thumbnail[0], $thumbnail[1]);
// Copy content:
imagecopyresampled($bCanvas, $image, 0, 0, 0, 0, ($bigImage[0] * $sourceAspect), ($bigImage[1]/$sourceAspect), $imageSize[0], $imageSize[1]);
imagecopyresampled($mCanvas, $image, 0, 0, 0, 0, $mediumImage[0], $mediumImage[1], $imageSize[0], $imageSize[1]);
imagecopyresampled($lCanvas, $image, 0, 0, 0, 0, $listImage[0], $listImage[1], $imageSize[0], $imageSize[1]);
imagecopyresampled($tCanvas, $image, 0, 0, 0, 0, $thumbnail[0], $thumbnail[1], $imageSize[0], $imageSize[1]);
// Save images:
$saveB = imagejpeg($bCanvas, $targetFile.'_big.jpg', 90);
$saveM = imagejpeg($mCanvas, $targetFile.'_medium.jpg', 90);
$saveT = imagejpeg($lCanvas, $targetFile.'_list.jpg', 90);
$saveT = imagejpeg($tCanvas, $targetFile.'_thumb.jpg', 90);
// Destroy images:
imagedestroy($image);
imagedestroy($bCanvas);
imagedestroy($mCanvas);
imagedestroy($lCanvas);
imagedestroy($tCanvas);
// Watermark images:
$mark = imagecreatefrompng("logo.png");
list($mwidth, $mheight) = getimagesize("logo.png");
$img = imagecreatefromjpeg($targetFile.'_big.jpg');
list($bwidth, $bheight) = getimagesize($targetFile.'_big.jpg');
imagecopy($img, $mark, $bwidth-$mwidth-25, $bheight-$mheight-25, 0, 0, $mwidth, $mheight);
imagejpeg($img, $targetFile.'_big.jpg', 100);
imagedestroy($img);
} else {
echo "0";
}
} else {
move_uploaded_file($tempFile,$targetFile.'.'.$fileExtension);
}
我会真的很高兴,如果有人可以帮助我解决这个问题。我一直在尝试几种方法,但没有一个似乎正常工作。正如您在顶部看到的,我已经定义了要在变量“bigImage”,“mediumImage”,“listImage”和“thumbnail”中使用的画布大小。
在此先感谢! // 乔纳森
据我记得你不能用GD做到这一点,但Imagick会提供这些可能性。 – markus