/**
* Creates and returns a new Image object that is a rendering of this Image object. The input
* object defines the rendering parameters of the new Image object. Imagemagick's convert program
* is used to create a scaled bounding box of this Image with the given dimensions.
*
* @param {Object} input A JavaScript object specifying the rendering parameters. For example,
* <code> {maxWidth:200, maxHeight:100} </code>
* @returns {Image} The rendered Image object
* @throws Exception
*/
public ImageObject jsFunction_render(Object input) throws Exception {
if (input == null || !(input instanceof Scriptable)) {
throw new RuntimeException("The first argument to render() must be a scriptable object.");
}
Scriptable s = (Scriptable) input;
int maxWidth = toInt(s.get("maxWidth", s));
int maxHeight = toInt(s.get("maxHeight", s));
int cropWidth = toInt(s.get("cropWidth", s));
int cropHeight = toInt(s.get("cropHeight", s));
int cropXOffset = toInt(s.get("cropXOffset", s));
int cropYOffset = toInt(s.get("cropYOffset", s));
int currentWidth = (int) node.getInteger(WIDTH);
int currentHeight = (int) node.getInteger(HEIGHT);
String aname = null;
if (maxWidth > 0 && maxHeight > 0 && currentWidth > 0 && currentHeight > 0) {
int[] dims = this.computeResizedDimensions(maxWidth, maxHeight, currentWidth, currentHeight);
aname = dims[0] + "x" + dims[1];
maxWidth = dims[0];
maxHeight = dims[1];
} else if (cropWidth > 0 && cropHeight > 0) {
aname = cropWidth + "x" + cropHeight + "_" + cropXOffset + "x" + cropYOffset;
} else {
throw new RuntimeException("render(), invalid parameter set.");
}
Object o = this.jsFunction_get(aname);
if (o instanceof ImageObject) {
return (ImageObject) o;
}
try {
synchronized (this) {
while (this.convertOps.contains(aname)) {
this.wait();
}
this.convertOps.add(aname);
}
o = ((axiom.objectmodel.db.Node) this.node).getChildElement(aname, true);
if (o instanceof Node) {
return (ImageObject) Context.toObject(o, this.core.global);
}
ImageObject computedImg = null;
String[] paths = getPaths();
String imgPath = paths[0];
String tmpPath = paths[1];
String fileName = node.getString(FileObject.FILE_NAME);
try {
File tmpFile = new File(tmpPath);
int[] dims = null;
if (maxWidth > 0 && maxHeight > 0) {
dims =
this.resize(
maxWidth,
maxHeight,
(int) this.node.getInteger(WIDTH),
(int) this.node.getInteger(HEIGHT),
imgPath,
tmpPath,
true);
} else {
dims = this.crop(cropWidth, cropHeight, cropXOffset, cropYOffset, imgPath, tmpPath);
}
if (dims == null) {
throw new Exception("ImageObject.render(), resizing the image failed.");
}
final String protoname = "Image";
INode node =
new axiom.objectmodel.db.Node(protoname, protoname, core.app.getWrappedNodeManager());
computedImg = new ImageObject("Image", core, node, core.getPrototype(protoname), true);
node.setString(FileObject.FILE_NAME, fileName);
node.setString(FileObject.ACCESSNAME, FileObjectCtor.generateAccessName(fileName));
node.setString(FileObject.CONTENT_TYPE, this.node.getString(FileObject.CONTENT_TYPE));
node.setJavaObject(FileObject.SELF, computedImg);
node.setInteger(ImageObject.WIDTH, dims[0]);
node.setInteger(ImageObject.HEIGHT, dims[1]);
node.setString(FileObject.RENDERED_CONTENT, "true");
node.setInteger(FileObject.FILE_SIZE, tmpFile.length());
computedImg.tmpPath = tmpPath;
} catch (Exception ex) {
throw new RuntimeException(
"ImageObject.jsfunction_bound(): Could not write the image to temporary storage, "
+ ex.getMessage());
}
if (computedImg != null) {
this.jsFunction_addThumbnail(computedImg, null);
return computedImg;
}
} finally {
synchronized (this) {
this.convertOps.remove(aname);
this.notifyAll();
}
}
return null;
}
