Walter Korman
2572535f95
to separate scene display from editing functionality. Load and initialize managers in a fashion that more appropriately hides the implementation details. Tidied comments up a bit. git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@103 542714f4-19e9-0310-aa3c-eee0fc999fb1
101 lines
2.5 KiB
Java
101 lines
2.5 KiB
Java
//
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// $Id: ImageManager.java,v 1.3 2001/07/23 18:52:51 shaper Exp $
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package com.threerings.media;
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import com.threerings.miso.Log;
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import com.threerings.resource.ResourceManager;
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import java.awt.*;
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import java.awt.image.*;
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import java.io.IOException;
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import java.util.Hashtable;
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/**
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* The ImageManager class provides a single point of access for image
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* retrieval and caching.
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*
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* <p> <b>Note:</b> The ImageManager must be constructed with a root
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* AWT component, in the interest of allowing for proper preparation
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* of images for optimal storage and eventual display.
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*/
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public class ImageManager
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{
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/**
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* Construct an ImageManager object with the ResourceManager from
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* which it will obtain its data, and a root component to which
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* images will be rendered.
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*/
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public ImageManager (ResourceManager rmgr, Component root)
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{
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_rmgr = rmgr;
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_root = root;
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_tk = root.getToolkit();
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}
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/**
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* Load the image from the specified filename and cache it for
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* faster retrieval henceforth.
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*/
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public Image getImage (String fname)
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{
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if (_root == null) {
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Log.warning("Attempt to get image without valid root component.");
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return null;
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}
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Image img = (Image)_imgs.get(fname);
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if (img != null) {
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Log.info("Retrieved image from cache [fname=" + fname + "].");
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return img;
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}
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Log.info("Loading image into cache [fname=" + fname + "].");
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try {
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byte[] data = _rmgr.getResourceAsBytes(fname);
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img = _tk.createImage(data);
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MediaTracker tracker = new MediaTracker(_root);
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tracker.addImage(img, 0);
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tracker.waitForID(0);
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if (tracker.isErrorAny()) {
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Log.warning("Error loading image [fname=" + fname + "].");
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return null;
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} else {
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_imgs.put(fname, img);
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}
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} catch (IOException ioe) {
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Log.warning("Exception loading image [ioe=" + ioe + "].");
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} catch (InterruptedException ie) {
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Log.warning("Interrupted loading image [ie=" + ie + "].");
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}
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return img;
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}
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/**
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* Creates a new image representing the specified rectangular
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* section cropped from the specified full image object.
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*/
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public Image getImageCropped (Image fullImg, int x, int y,
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int width, int height)
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{
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BufferedImage img =
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new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
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Graphics2D g2 = img.createGraphics();
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g2.drawImage(fullImg, -x, -y, null);
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return img;
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}
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protected ResourceManager _rmgr;
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protected Component _root;
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protected Hashtable _imgs = new Hashtable();
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protected Toolkit _tk = Toolkit.getDefaultToolkit();
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}
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