问题
In my application i have an image in a div,a button.
I want to rotate the image displayed and save the rotated image when i clicked on the button using jquery.
I already used the code:
http://code.google.com/p/jquery-rotate/
and jquery code:
$(function() { // doc ready
var rotation = 0; // variable to do rotation with
$("#img").click(function() {
rotation = (rotation + 45) % 360; // the mod 360 probably isn't needed
$("#cropbox").rotate(rotation);
});
});
html code:
<img src="demo_files/pool.jpg" id="cropbox" />
<input type="button" id="img" name="img" value="click" />
When i using above code ,There have two images one is the old image and another is the rotated image.
Here i want to rotate the same image and displaying only the rotated image .And save the rotated image ina directory.
How can i do this using jquery? If it is not possible with jquery then how can i do it possible with php/ajax?
回答1:
//define image path
$filename="image.jpg";
// Load the image
$source = imagecreatefromjpeg($filename);
// Rotate
$rotate = imagerotate($source, $degrees, 0);
//and save it on your server...
imagejpeg($rotate, "myNEWimage.jpg");
Take a look at:
imagerotate()
And:
file_put_contents()
回答2:
Image rotation: PNG or JPEG depend on file type with save on your server
// File and rotation
$rotateFilename = '/var/www/your_image.image_type'; // PATH
$degrees = 90;
$fileType = strtolower(substr('your_image.image_type', strrpos('your_image.image_type', '.') + 1));
if($fileType == 'png'){
header('Content-type: image/png');
$source = imagecreatefrompng($rotateFilename);
$bgColor = imagecolorallocatealpha($source, 255, 255, 255, 127);
// Rotate
$rotate = imagerotate($source, $degrees, $bgColor);
imagesavealpha($rotate, true);
imagepng($rotate,$rotateFilename);
}
if($fileType == 'jpg' || $fileType == 'jpeg'){
header('Content-type: image/jpeg');
$source = imagecreatefromjpeg($rotateFilename);
// Rotate
$rotate = imagerotate($source, $degrees, 0);
imagejpeg($rotate,$rotateFilename);
}
// Free the memory
imagedestroy($source);
imagedestroy($rotate);
It's works for me, try it.
回答3:
<?php //image rotate code here
if(isset($_POST['save']))
{
$degrees=90;
$new_file=$sourceName;
$filename ="http://localhost/dostoom/files_user/1000/4/153.jpg";
$rotang = $degrees;
list($width, $height, $type, $attr) = getimagesize($filename);
$size = getimagesize($filename);
switch($size['mime'])
{
case 'image/jpeg':
$source =
imagecreatefromjpeg($filename);
$bgColor=imageColorAllocateAlpha($source, 0, 0,
0, 0);
$rotation = imagerotate($source,
$rotang,$bgColor);
imagealphablending($rotation, false);
imagesavealpha($rotation, true);
imagecreate($width,$height);
imagejpeg($rotation,$new_file);
chmod($filename, 0777);
break;
case 'image/png':
$source =
imagecreatefrompng($filename);
$bgColor=imageColorAllocateAlpha($source, 0, 0,
0, 0);
$rotation = imagerotate($source,
$rotang,$bgColor);
imagealphablending($rotation, false);
imagesavealpha($rotation, true);
imagecreate($width,$height);
imagepng($rotation,$new_file);
chmod($filename, 0777);
break;
case 'image/gif':
$source =
imagecreatefromgif($filename);
$bgColor=imageColorAllocateAlpha($source, 0, 0,
0, 0);
$rotation = imagerotate($source,
$rotang,$bgColor);
imagealphablending($rotation, false);
imagesavealpha($rotation, true);
imagecreate($width,$height);
imagegif($rotation,$new_file);
chmod($filename, 0777);
break;
case 'image/vnd.wap.wbmp':
$source =
imagecreatefromwbmp($filename);
$bgColor=imageColorAllocateAlpha($source, 0, 0,
0, 0);
$rotation = imagerotate($source,
$rotang,$bgColor);
imagealphablending($rotation, false);
imagesavealpha($rotation, true);
imagecreate($width,$height);
imagewbmp($rotation,$new_file);
chmod($filename, 0777);
break;
}
}
?>
回答4:
You can try my solution to rotate the image
<?php
ob_start();
// Content type
header('Content-type: image/jpeg');
class RotateImage {
private $_path;
private $_degrees;
public function __construct($path, $degrees){
$this->_path = $path;
$this->_degrees = $degrees;
}
public function rotate() {
$image = new Imagick($this->_path);
$image->rotateimage('black', $this->_degrees);
echo $image->getImageBlob();
exit();
}
}
if($_SERVER['REQUEST_METHOD'] == 'GET'){
$sourceImagePath = isset($_GET['image_path']) ? $_GET['image_path'] : null;
$degrees = isset($_GET['degrees']) ? $_GET['degrees'] : 90;
$obj = new RotateImage($sourceImagePath, $degrees);
return $obj->rotate();
}
?>
回答5:
it will helps to rotate an image and save the image in whatever the angle image has. for example we rotated image into 180 degrees .we can save that image (180 degrees) into our folder.here we used canvas.it helps for ASP.NET developers
<div class="modal fade" id="myModal" role="dialog">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" id="CLoseToggle" onclick="CloseModal()">×</button>
<h4 class="modal-title">Image Preview</h4>
</div>
<div class="modal-body">
<div class="row">
<div class="col-md-12 cr-img-box">
<asp:Image ID="CropImg" ImageUrl="" runat="server" class="north"/>
<canvas id="canvas"></canvas>
<input type="hidden" id="hfData" runat="server"/>
<input type="hidden" id="hdnCropImageFileLocation"/>
</div>
</div>
</div>
<div class="modal-footer">
<div style="text-align: center;">
<input type="button" id="btnRotate" class="btn btn-sm btn-info" value="Rotate"/>
<asp:Button ID="OKFinalSave" class="btn btn-sm btn-info" Text="Submit" runat="server"
OnClick="OKFinalSave_Click"/>
</div>
</div>
</div>
</div>
</div>
protected void OKFinalSave_Click(object sender, EventArgs e)
{
string
CropImageLocation = ConfigurationManager.AppSettings["CropFileLocation"].ToString();
CropImageLocation = CropImageLocation + DateTime.Now.ToString("yyyyMMdd") + "\\" + LoanNumber.Value;
string
a = CropImageLocation + "\\" + LoanNumber.Value + "_SIGN";
string
base64String = hfData.Value.Replace("data:image/png;base64,", string.Empty);
byte[]
bytes = Convert.FromBase64String(base64String);
string
filePath = a;
if (!Directory.Exists(CropImageLocation)) {
Directory.CreateDirectory(CropImageLocation);
}
if (File.Exists(a)) {
File.Delete(CropImageLocation + "\\" + LoanNumber.Value + "_SIGN");
}
System.IO.File.WriteAllBytes(CropImageLocation + "\\" + LoanNumber.Value + "_SIGN.jpeg", bytes);
SaveCropedPath(LoanNumber.Value, CropImageLocation + "\\" + LoanNumber.Value + "_SIGN.jpeg");
}
<script type = "text/javascript" >
var img = null, canvas = null;
$(function () {
$("#canvas").css("display", "none");
img = document.getElementById('CropImg');
canvas = document.getElementById('canvas');
if (!canvas || !canvas.getContext) {
canvas.parentNode.removeChild(canvas);
} else {
//img.style.position = 'absolute';
//img.style.visibility = 'hidden';
}
RotateImage(0);
$('#btnRotate').click(function () {
$("#CropImg").css("display", "none");
$("#canvas").css("display", "block");
if (img.className == "north") {
RotateImage(90);
img.className = "west";
} else if (img.className == "west") {
RotateImage(180);
img.className = "south";
} else if (img.className == "south") {
RotateImage(270);
img.className = "east";
} else if (img.className == "east") {
RotateImage(0);
img.className = "north";
}
});
});
function RotateImage(degree) {
if (document.getElementById('canvas')) {
var context = canvas.getContext('2d');
var cw = img.width, ch = img.height, cx = 0, cy = 0;
switch (degree) {
case 90:
cw = img.height;
ch = img.width;
cy = img.height * (-1);
break;
case 180:
cx = img.width * (-1);
cy = img.height * (-1);
break;
case 270:
cw = img.height;
ch = img.width;
cx = img.width * (-1);
break;
}
canvas.setAttribute('width', cw);
canvas.setAttribute('height', ch);
context.rotate(degree * Math.PI / 180);
context.drawImage(img, cx, cy);
document.getElementById('hfData').value = canvas.toDataURL();
} else {
switch (degree) {
case 0:
image.style.filter = 'progid:DXImageTransform.Microsoft.BasicImage(rotation=0)';
break;
case 90:
image.style.filter = 'progid:DXImageTransform.Microsoft.BasicImage(rotation=1)';
break;
case 180:
image.style.filter = 'progid:DXImageTransform.Microsoft.BasicImage(rotation=2)';
break;
case 270:
image.style.filter = 'progid:DXImageTransform.Microsoft.BasicImage(rotation=3)';
break;
}
}
}
</script>
来源：https://stackoverflow.com/questions/11259881/how-to-rotate-image-and-save-the-image