mirror of
https://github.com/haraldk/TwelveMonkeys.git
synced 2025-08-02 19:15:29 -04:00
Rewritten the MappedBufferImage class, should now perform a lot better.
This commit is contained in:
Harald Kuhr
parent
c982203361
commit
7d4d007975
@ -0,0 +1,24 @@
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package com.twelvemonkeys.image;
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import java.awt.*;
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import java.awt.image.DataBuffer;
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import java.awt.image.SampleModel;
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import java.awt.image.WritableRaster;
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/**
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* GenericWritableRaster
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*
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* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
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* @author last modified by $Author: haraldk$
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* @version $Id: GenericWritableRaster.java,v 1.0 Jun 13, 2010 12:27:45 AM haraldk Exp$
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*/
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class GenericWritableRaster extends WritableRaster {
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public GenericWritableRaster(final SampleModel model, final DataBuffer buffer, final Point origin) {
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super(model, buffer, origin);
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}
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@Override
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public String toString() {
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return String.format("%s@%x: w = %s h = %s", getClass().getSimpleName(), System.identityHashCode(this), getWidth(), getHeight());
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}
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}
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@ -1,255 +0,0 @@
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package com.twelvemonkeys.image;
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import javax.swing.*;
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import java.awt.*;
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import java.awt.color.ColorSpace;
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import java.awt.image.*;
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import java.io.File;
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import java.io.IOException;
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import java.io.RandomAccessFile;
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import java.nio.ByteBuffer;
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import java.nio.channels.FileChannel;
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import java.util.Random;
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/**
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* MappedBufferImage
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*
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* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
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* @author last modified by $Author: haraldk$
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* @version $Id: MappedBufferImage.java,v 1.0 May 26, 2010 5:07:01 PM haraldk Exp$
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*/
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public class MappedBufferImage extends BufferedImage {
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private static final boolean ALPHA = true;
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public MappedBufferImage(ColorModel cm, MappedFileRaster raster, boolean isRasterPremultiplied) {
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super(cm, raster, isRasterPremultiplied, null);
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}
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public static void main(String[] args) throws IOException {
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int w = args.length > 0 ? Integer.parseInt(args[0]) : 6000;
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int h = args.length > 1 ? Integer.parseInt(args[1]) : (args.length > 0 ? w * 2 / 3 : 4000);
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DataBuffer buffer = new MappedFileBuffer(w, h, ALPHA ? 4 : 3, 1);
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// Mix in some nice colors
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for (int y = 0; y < h; y++) {
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for (int x = 0; x < w; x++) {
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int r = (int) ((x * y * 255.0) / (h * w));
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int g = (int) (((w - x) * y * 255.0) / (h * w));
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int b = (int) ((x * (h - y) * 255.0) / (h * w));
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int off = (y * w + x) * (ALPHA ? 4 : 3);
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if (ALPHA) {
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int a = (int) (((w - x) * (h - y) * 255.0) / (h * w));
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buffer.setElem(off++, 255 - a);
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}
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buffer.setElem(off++, b);
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buffer.setElem(off++, g);
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buffer.setElem(off, r);
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}
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}
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ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
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ComponentColorModel model = new ComponentColorModel(cs, ALPHA, false, ALPHA ? TRANSLUCENT : OPAQUE, DataBuffer.TYPE_BYTE);
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BufferedImage image = new MappedBufferImage(model, new MappedFileRaster(w, h, buffer), false);
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// Add some random dots (get out the coffee)
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// int s = 300;
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// int ws = w / s;
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// int hs = h / s;
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//
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// Color[] colors = new Color[] {
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// Color.WHITE, Color.ORANGE, Color.BLUE, Color.MAGENTA, Color.BLACK, Color.RED, Color.CYAN,
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// Color.GRAY, Color.GREEN, Color.YELLOW, Color.PINK, Color.LIGHT_GRAY, Color.DARK_GRAY
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// };
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//
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// Random r = new Random();
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//
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// for (int y = 0; y < hs - 1; y++) {
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// for (int x = 0; x < ws - 1; x++) {
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// Graphics2D g = image.getSubimage(x * s, y * s, 2 * s, 2 * s).createGraphics();
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// try {
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// g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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// g.setComposite(AlphaComposite.SrcOver.derive(r.nextFloat()));
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// g.setColor(colors[r.nextInt(colors.length)]);
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// int o = r.nextInt(s) + s / 10;
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// int c = (2 * s - o) / 2;
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// g.fillOval(c, c, o, o);
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// }
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// finally {
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// g.dispose();
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// }
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// }
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// }
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System.out.println("image = " + image);
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JFrame frame = new JFrame(String.format("Test [%s x %s] (%s)", w, h, toHumanReadableSize(w * h * (ALPHA ? 4 : 3))));
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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JScrollPane scroll = new JScrollPane(new ImageComponent(image));
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scroll.setBorder(BorderFactory.createEmptyBorder());
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scroll.getViewport().setScrollMode(JViewport.SIMPLE_SCROLL_MODE);
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scroll.getViewport().setDoubleBuffered(false);
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frame.add(scroll);
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frame.pack();
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frame.setLocationRelativeTo(null);
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frame.setVisible(true);
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}
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private static String toHumanReadableSize(long size) {
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return String.format("%,d MB", (int) (size / (double) (1024L << 10)));
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}
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private static class ImageComponent extends JComponent implements Scrollable {
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private final BufferedImage image;
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private final Paint texture;
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public ImageComponent(BufferedImage image) {
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setDoubleBuffered(false);
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this.image = image;
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texture = createTexture();
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}
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private static Paint createTexture() {
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GraphicsConfiguration graphicsConfiguration = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
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BufferedImage pattern = graphicsConfiguration.createCompatibleImage(20, 20);
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Graphics2D g = pattern.createGraphics();
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try {
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g.setColor(Color.LIGHT_GRAY);
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g.fillRect(0, 0, pattern.getWidth(), pattern.getHeight());
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g.setColor(Color.GRAY);
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g.fillRect(0, 0, pattern.getWidth() / 2, pattern.getHeight() / 2);
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g.fillRect(pattern.getWidth() / 2, pattern.getHeight() / 2, pattern.getWidth() / 2, pattern.getHeight() / 2);
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}
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finally {
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g.dispose();
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}
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return new TexturePaint(pattern, new Rectangle(pattern.getWidth(), pattern.getHeight()));
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}
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@Override
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protected void paintComponent(Graphics g) {
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Insets insets = getInsets();
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// We ant to paint only the visible part of the image
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Rectangle rect = getVisibleRect();
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Graphics2D g2 = (Graphics2D) g;
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g2.setPaint(texture);
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g2.fillRect(rect.x, rect.y, rect.width, rect.height);
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try {
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// Paint slices of the image, to preserve memory
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// Make slices wide to conform to memory alignment of buffer
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int sliceHeight = 200;
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int slices = rect.height / sliceHeight;
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for (int i = 0; i <= slices; i++) {
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int h = i == slices ? Math.min(sliceHeight, image.getHeight() - (rect.y + i * sliceHeight)) : sliceHeight;
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if (h == 0) {
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break;
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}
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BufferedImage img = image.getSubimage(rect.x, rect.y + i * sliceHeight, rect.width, h);
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g2.drawImage(img, insets.left + rect.x, insets.top + rect.y + i * sliceHeight, null);
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}
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// BufferedImage img = image.getSubimage(rect.x, rect.y, rect.width, rect.height);
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// g2.drawImage(img, insets.left + rect.x, insets.top + rect.y, null);
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}
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catch (NullPointerException e) {
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e.printStackTrace();
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// Happens whenever apple.awt.OSXCachingSufraceManager runs out of memory
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repaint(); // NOTE: Will cause a brief flash while the component is redrawn
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}
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}
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@Override
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public Dimension getPreferredSize() {
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Insets insets = getInsets();
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return new Dimension(image.getWidth() + insets.left + insets.right, image.getHeight() + insets.top + insets.bottom);
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}
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public Dimension getPreferredScrollableViewportSize() {
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return getPreferredSize();
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}
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public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
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return 10;
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}
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public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
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switch (orientation) {
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case SwingConstants.HORIZONTAL:
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return visibleRect.width * 3 / 4;
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case SwingConstants.VERTICAL:
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default:
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return visibleRect.height * 3 / 4;
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}
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}
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public boolean getScrollableTracksViewportWidth() {
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return false;
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}
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public boolean getScrollableTracksViewportHeight() {
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return false;
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}
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}
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private static class MappedFileBuffer extends DataBuffer {
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final ByteBuffer buffer;
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public MappedFileBuffer(final int width, final int height, final int numComponents, final int numBanks) throws IOException {
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super(DataBuffer.TYPE_BYTE, width * height * numComponents, numBanks);
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if (size < 0) {
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throw new IllegalArgumentException("Integer overflow");
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}
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File tempFile = File.createTempFile(String.format("%s-", getClass().getSimpleName()), ".tmp");
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tempFile.deleteOnExit();
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RandomAccessFile raf = new RandomAccessFile(tempFile, "rw");
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raf.setLength(size * banks);
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FileChannel channel = raf.getChannel();
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// Map entire file into memory, let OS virtual memory/paging do the heavy lifting
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buffer = channel.map(FileChannel.MapMode.READ_WRITE, 0, size * banks);
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// According to the docs, we can safely close the channel and delete the file now
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channel.close();
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if (!tempFile.delete()) {
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System.err.println("Could not delete temp file: " + tempFile.getAbsolutePath());
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}
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}
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@Override
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public int getElem(int bank, int i) {
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return buffer.get(bank * size + i);
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}
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@Override
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public void setElem(int bank, int i, int val) {
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buffer.put(bank * size + i, (byte) val);
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}
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}
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private static class MappedFileRaster extends WritableRaster {
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public MappedFileRaster(int w, int h, DataBuffer buffer) {
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super(
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new PixelInterleavedSampleModel(DataBuffer.TYPE_BYTE, w, h, ALPHA ? 4 : 3, w * (ALPHA ? 4 : 3), ALPHA ? new int[]{3, 2, 1, 0} : new int[]{2, 1, 0}),
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buffer, new Point()
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);
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}
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@Override
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public String toString() {
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return String.format("%s@%s: w = %s h = %s", getClass().getSimpleName(), System.identityHashCode(this), getWidth(), getHeight());
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}
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}
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}
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@ -0,0 +1,260 @@
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package com.twelvemonkeys.image;
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import javax.swing.*;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.awt.image.ColorModel;
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import java.awt.image.DataBuffer;
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import java.awt.image.SampleModel;
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import java.io.IOException;
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import java.util.Random;
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/**
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* MappedBufferedImageFactory
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*
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* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
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* @author last modified by $Author: haraldk$
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* @version $Id: MappedBufferedImageFactory.java,v 1.0 May 26, 2010 5:07:01 PM haraldk Exp$
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*/
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public class MappedBufferedImageFactory {
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private static final boolean ALPHA = true;
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public static void main(String[] args) throws IOException {
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int w = args.length > 0 ? Integer.parseInt(args[0]) : 6000;
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int h = args.length > 1 ? Integer.parseInt(args[1]) : w * 2 / 3;
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ColorModel cm = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().
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getDefaultConfiguration().getColorModel(ALPHA ? Transparency.TRANSLUCENT : Transparency.OPAQUE);
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// ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
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// ColorModel cm = new ComponentColorModel(cs, ALPHA, false, ALPHA ? TRANSLUCENT : OPAQUE, DataBuffer.TYPE_BYTE);
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SampleModel sm = cm.createCompatibleSampleModel(w, h);
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// System.err.println("cm: " + cm);
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// System.err.println("cm.getNumComponents(): " + cm.getNumComponents());
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// System.err.println("cm.getPixelSize(): " + cm.getPixelSize());
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// System.err.println("cm.getComponentSize(): " + Arrays.toString(cm.getComponentSize()));
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// System.err.println("sm.getNumDataElements(): " + sm.getNumDataElements());
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// System.err.println("sm.getNumBands(): " + sm.getNumBands());
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// System.err.println("sm.getSampleSize(): " + Arrays.toString(sm.getSampleSize()));
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DataBuffer buffer = MappedFileBuffer.create(sm.getTransferType(), w * h * sm.getNumDataElements(), 1);
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// DataBuffer buffer = sm.createDataBuffer();
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// Mix in some nice colors
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for (int y = 0; y < h; y++) {
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for (int x = 0; x < w; x++) {
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int r = (int) ((x * y * 255.0) / (h * w));
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int g = (int) (((w - x) * y * 255.0) / (h * w));
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int b = (int) ((x * (h - y) * 255.0) / (h * w));
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int a = ALPHA ? (int) (((w - x) * (h - y) * 255.0) / (h * w)) : 0;
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switch (cm.getTransferType()) {
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case DataBuffer.TYPE_BYTE:
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int off = (y * w + x) * (ALPHA ? 4 : 3);
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if (ALPHA) {
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buffer.setElem(off++, 255 - a);
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buffer.setElem(off++, b);
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buffer.setElem(off++, g);
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buffer.setElem(off, r);
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}
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else {
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// TODO: Why RGB / ABGR??
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buffer.setElem(off++, r);
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buffer.setElem(off++, g);
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buffer.setElem(off, b);
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}
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break;
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case DataBuffer.TYPE_INT:
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buffer.setElem(y * w + x, (255 - a) << 24 | r << 16 | g << 8 | b);
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break;
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default:
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System.err.println("Transfer type not supported: " + cm.getTransferType());
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}
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}
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}
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BufferedImage image = new BufferedImage(cm, new GenericWritableRaster(sm, buffer, new Point()), cm.isAlphaPremultiplied(), null);
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||||||
|
// BufferedImage image = new BufferedImage(cm, new SunWritableRaster(sm, buffer, new Point()), cm.isAlphaPremultiplied(), null);
|
||||||
|
// BufferedImage image = new BufferedImage(cm, Raster.createWritableRaster(sm, buffer, null), false null);
|
||||||
|
|
||||||
|
System.out.println("image = " + image);
|
||||||
|
|
||||||
|
// Add some random dots (get out the coffee)
|
||||||
|
int s = 300;
|
||||||
|
int ws = w / s;
|
||||||
|
int hs = h / s;
|
||||||
|
|
||||||
|
Color[] colors = new Color[] {
|
||||||
|
Color.WHITE, Color.ORANGE, Color.BLUE, Color.MAGENTA, Color.BLACK, Color.RED, Color.CYAN,
|
||||||
|
Color.GRAY, Color.GREEN, Color.YELLOW, Color.PINK, Color.LIGHT_GRAY, Color.DARK_GRAY
|
||||||
|
};
|
||||||
|
|
||||||
|
Random r = new Random();
|
||||||
|
|
||||||
|
long start = System.currentTimeMillis();
|
||||||
|
for (int y = 0; y < hs - 1; y++) {
|
||||||
|
for (int x = 0; x < ws - 1; x++) {
|
||||||
|
BufferedImage tile = image.getSubimage(x * s, y * s, 2 * s, 2 * s);
|
||||||
|
Graphics2D g;
|
||||||
|
try {
|
||||||
|
g = tile.createGraphics();
|
||||||
|
}
|
||||||
|
catch (OutOfMemoryError e) {
|
||||||
|
System.gc();
|
||||||
|
g = tile.createGraphics(); // If this fails, give up
|
||||||
|
}
|
||||||
|
|
||||||
|
try {
|
||||||
|
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
|
||||||
|
g.setComposite(AlphaComposite.SrcOver.derive(r.nextFloat()));
|
||||||
|
g.setColor(colors[r.nextInt(colors.length)]);
|
||||||
|
int o = r.nextInt(s) + s / 10;
|
||||||
|
int c = (2 * s - o) / 2;
|
||||||
|
g.fillOval(c, c, o, o);
|
||||||
|
}
|
||||||
|
finally {
|
||||||
|
g.dispose();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
System.out.printf("Done painting %d dots in %d ms%n", hs * ws, System.currentTimeMillis() - start);
|
||||||
|
|
||||||
|
JFrame frame = new JFrame(String.format("Test [%s x %s] (%s)", w, h, toHumanReadableSize(w * h * (ALPHA ? 4 : 3))));
|
||||||
|
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
|
||||||
|
JScrollPane scroll = new JScrollPane(new ImageComponent(image));
|
||||||
|
scroll.setBorder(BorderFactory.createEmptyBorder());
|
||||||
|
frame.add(scroll);
|
||||||
|
frame.pack();
|
||||||
|
frame.setLocationRelativeTo(null);
|
||||||
|
frame.setVisible(true);
|
||||||
|
}
|
||||||
|
|
||||||
|
private static String toHumanReadableSize(long size) {
|
||||||
|
return String.format("%,d MB", (int) (size / (double) (1024L << 10)));
|
||||||
|
}
|
||||||
|
|
||||||
|
private static class ImageComponent extends JComponent implements Scrollable {
|
||||||
|
private final BufferedImage image;
|
||||||
|
private Paint texture;
|
||||||
|
|
||||||
|
public ImageComponent(final BufferedImage image) {
|
||||||
|
setOpaque(true); // Very important when subclassing JComponent...
|
||||||
|
this.image = image;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void addNotify() {
|
||||||
|
super.addNotify();
|
||||||
|
|
||||||
|
texture = createTexture();
|
||||||
|
}
|
||||||
|
|
||||||
|
private Paint createTexture() {
|
||||||
|
BufferedImage pattern = getGraphicsConfiguration().createCompatibleImage(20, 20);
|
||||||
|
Graphics2D g = pattern.createGraphics();
|
||||||
|
|
||||||
|
try {
|
||||||
|
g.setColor(Color.LIGHT_GRAY);
|
||||||
|
g.fillRect(0, 0, pattern.getWidth(), pattern.getHeight());
|
||||||
|
g.setColor(Color.GRAY);
|
||||||
|
g.fillRect(0, 0, pattern.getWidth() / 2, pattern.getHeight() / 2);
|
||||||
|
g.fillRect(pattern.getWidth() / 2, pattern.getHeight() / 2, pattern.getWidth() / 2, pattern.getHeight() / 2);
|
||||||
|
}
|
||||||
|
finally {
|
||||||
|
g.dispose();
|
||||||
|
}
|
||||||
|
|
||||||
|
return new TexturePaint(pattern, new Rectangle(pattern.getWidth(), pattern.getHeight()));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
protected void paintComponent(Graphics g) {
|
||||||
|
// TODO: Figure out why mouse wheel/track pad scroll repaints entire component,
|
||||||
|
// consider creating a custom mouse wheel listener as a workaround
|
||||||
|
|
||||||
|
// We want to paint only the visible part of the image
|
||||||
|
Rectangle visible = getVisibleRect();
|
||||||
|
Rectangle clip = g.getClipBounds();
|
||||||
|
Rectangle rect = clip == null ? visible : visible.intersection(clip);
|
||||||
|
|
||||||
|
Graphics2D g2 = (Graphics2D) g;
|
||||||
|
g2.setPaint(texture);
|
||||||
|
g2.fillRect(rect.x, rect.y, rect.width, rect.height);
|
||||||
|
|
||||||
|
long start = System.currentTimeMillis();
|
||||||
|
repaintImage(rect, g2);
|
||||||
|
System.err.println("repaint: " + (System.currentTimeMillis() - start) + " ms");
|
||||||
|
}
|
||||||
|
|
||||||
|
private void repaintImage(Rectangle rect, Graphics2D g2) {
|
||||||
|
try {
|
||||||
|
// Paint tiles of the image, to preserve memory
|
||||||
|
int sliceSize = 200;
|
||||||
|
|
||||||
|
int slicesW = rect.width / sliceSize;
|
||||||
|
int slicesH = rect.height / sliceSize;
|
||||||
|
|
||||||
|
for (int sliceY = 0; sliceY <= slicesH; sliceY++) {
|
||||||
|
for (int sliceX = 0; sliceX <= slicesW; sliceX++) {
|
||||||
|
int x = rect.x + sliceX * sliceSize;
|
||||||
|
int y = rect.y + sliceY * sliceSize;
|
||||||
|
|
||||||
|
int w = sliceX == slicesW ? Math.min(sliceSize, rect.x + rect.width - x) : sliceSize;
|
||||||
|
int h = sliceY == slicesH ? Math.min(sliceSize, rect.y + rect.height - y) : sliceSize;
|
||||||
|
|
||||||
|
if (w == 0 || h == 0) {
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// System.err.printf("%04d, %04d, %04d, %04d%n", x, y, w, h);
|
||||||
|
BufferedImage img = image.getSubimage(x, y, w, h);
|
||||||
|
g2.drawImage(img, x, y, null);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// BufferedImage img = image.getSubimage(rect.x, rect.y, rect.width, rect.height);
|
||||||
|
// g2.drawImage(img, rect.x, rect.y, null);
|
||||||
|
}
|
||||||
|
catch (NullPointerException e) {
|
||||||
|
// e.printStackTrace();
|
||||||
|
// Happens whenever apple.awt.OSXCachingSufraceManager runs out of memory
|
||||||
|
// TODO: Figure out why repaint(x,y,w,h) doesn't work any more..?
|
||||||
|
// repaint(rect.x, rect.y, rect.width, rect.height); // NOTE: Will cause a brief flash while the component is redrawn
|
||||||
|
repaint(); // NOTE: Might cause a brief flash while the component is redrawn
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public Dimension getPreferredSize() {
|
||||||
|
return new Dimension(image.getWidth(), image.getHeight());
|
||||||
|
}
|
||||||
|
|
||||||
|
public Dimension getPreferredScrollableViewportSize() {
|
||||||
|
return getPreferredSize();
|
||||||
|
}
|
||||||
|
|
||||||
|
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
|
||||||
|
return 10;
|
||||||
|
}
|
||||||
|
|
||||||
|
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
|
||||||
|
switch (orientation) {
|
||||||
|
case SwingConstants.HORIZONTAL:
|
||||||
|
return visibleRect.width * 3 / 4;
|
||||||
|
case SwingConstants.VERTICAL:
|
||||||
|
default:
|
||||||
|
return visibleRect.height * 3 / 4;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public boolean getScrollableTracksViewportWidth() {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
public boolean getScrollableTracksViewportHeight() {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
}
|
||||||
@ -0,0 +1,152 @@
|
|||||||
|
package com.twelvemonkeys.image;
|
||||||
|
|
||||||
|
import java.awt.image.DataBuffer;
|
||||||
|
import java.io.File;
|
||||||
|
import java.io.IOException;
|
||||||
|
import java.io.RandomAccessFile;
|
||||||
|
import java.nio.*;
|
||||||
|
import java.nio.channels.FileChannel;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* MappedFileBuffer
|
||||||
|
*
|
||||||
|
* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
|
||||||
|
* @author last modified by $Author: haraldk$
|
||||||
|
* @version $Id: MappedFileBuffer.java,v 1.0 Jun 12, 2010 4:56:51 PM haraldk Exp$
|
||||||
|
*/
|
||||||
|
public abstract class MappedFileBuffer extends DataBuffer {
|
||||||
|
final Buffer buffer;
|
||||||
|
|
||||||
|
private MappedFileBuffer(final int type, final int size, final int numBanks) throws IOException {
|
||||||
|
super(type, size, numBanks);
|
||||||
|
|
||||||
|
if (size < 0) {
|
||||||
|
throw new IllegalArgumentException("Integer overflow for size: " + size);
|
||||||
|
}
|
||||||
|
|
||||||
|
int componentSize;
|
||||||
|
switch (type) {
|
||||||
|
case DataBuffer.TYPE_BYTE:
|
||||||
|
componentSize = 1;
|
||||||
|
break;
|
||||||
|
case DataBuffer.TYPE_USHORT:
|
||||||
|
componentSize = 2;
|
||||||
|
break;
|
||||||
|
case DataBuffer.TYPE_INT:
|
||||||
|
componentSize = 4;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
throw new IllegalArgumentException("Unsupported data type: " + type);
|
||||||
|
}
|
||||||
|
|
||||||
|
File tempFile = File.createTempFile(String.format("%s-", getClass().getSimpleName()), ".tmp");
|
||||||
|
tempFile.deleteOnExit();
|
||||||
|
|
||||||
|
try {
|
||||||
|
RandomAccessFile raf = new RandomAccessFile(tempFile, "rw");
|
||||||
|
|
||||||
|
long length = ((long) size) * componentSize * numBanks;
|
||||||
|
|
||||||
|
raf.setLength(length);
|
||||||
|
FileChannel channel = raf.getChannel();
|
||||||
|
|
||||||
|
// Map entire file into memory, let OS virtual memory/paging do the heavy lifting
|
||||||
|
MappedByteBuffer byteBuffer = channel.map(FileChannel.MapMode.READ_WRITE, 0, length);
|
||||||
|
// MappedByteBuffer byteBuffer = channel.map(FileChannel.MapMode.PRIVATE, 0, length);
|
||||||
|
|
||||||
|
switch (type) {
|
||||||
|
case DataBuffer.TYPE_BYTE:
|
||||||
|
buffer = byteBuffer;
|
||||||
|
break;
|
||||||
|
case DataBuffer.TYPE_USHORT:
|
||||||
|
buffer = byteBuffer.asShortBuffer();
|
||||||
|
break;
|
||||||
|
case DataBuffer.TYPE_INT:
|
||||||
|
buffer = byteBuffer.asIntBuffer();
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
throw new IllegalArgumentException("Unsupported data type: " + type);
|
||||||
|
}
|
||||||
|
|
||||||
|
// According to the docs, we can safely close the channel and delete the file now
|
||||||
|
channel.close();
|
||||||
|
}
|
||||||
|
finally {
|
||||||
|
if (!tempFile.delete()) {
|
||||||
|
System.err.println("Could not delete temp file: " + tempFile.getAbsolutePath());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// TODO: Is throws IOException a good idea?
|
||||||
|
|
||||||
|
public static MappedFileBuffer create(final int type, final int size, final int numBanks) throws IOException {
|
||||||
|
switch (type) {
|
||||||
|
case DataBuffer.TYPE_BYTE:
|
||||||
|
return new DataBufferByte(size, numBanks);
|
||||||
|
case DataBuffer.TYPE_USHORT:
|
||||||
|
return new DataBufferUShort(size, numBanks);
|
||||||
|
case DataBuffer.TYPE_INT:
|
||||||
|
return new DataBufferInt(size, numBanks);
|
||||||
|
default:
|
||||||
|
throw new IllegalArgumentException("Unsupported data type: " + type);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
final static class DataBufferByte extends MappedFileBuffer {
|
||||||
|
private final ByteBuffer buffer;
|
||||||
|
|
||||||
|
public DataBufferByte(int size, int numBanks) throws IOException {
|
||||||
|
super(DataBuffer.TYPE_BYTE, size, numBanks);
|
||||||
|
buffer = (ByteBuffer) super.buffer;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public int getElem(int bank, int i) {
|
||||||
|
return buffer.get(bank * size + i);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void setElem(int bank, int i, int val) {
|
||||||
|
buffer.put(bank * size + i, (byte) val);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
final static class DataBufferUShort extends MappedFileBuffer {
|
||||||
|
private final ShortBuffer buffer;
|
||||||
|
|
||||||
|
public DataBufferUShort(int size, int numBanks) throws IOException {
|
||||||
|
super(DataBuffer.TYPE_USHORT, size, numBanks);
|
||||||
|
buffer = (ShortBuffer) super.buffer;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public int getElem(int bank, int i) {
|
||||||
|
return buffer.get(bank * size + i);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void setElem(int bank, int i, int val) {
|
||||||
|
buffer.put(bank * size + i, (short) (val & 0xffff));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
final static class DataBufferInt extends MappedFileBuffer {
|
||||||
|
private final IntBuffer buffer;
|
||||||
|
|
||||||
|
public DataBufferInt(int size, int numBanks) throws IOException {
|
||||||
|
super(DataBuffer.TYPE_INT, size, numBanks);
|
||||||
|
buffer = (IntBuffer) super.buffer;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public int getElem(int bank, int i) {
|
||||||
|
return buffer.get(bank * size + i);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void setElem(int bank, int i, int val) {
|
||||||
|
buffer.put(bank * size + i, val);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
x
Reference in New Issue
Block a user