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/**
* This product currently only contains code developed by authors
* of specific components, as identified by the source code files.
*
* Since product implements StAX API, it has dependencies to StAX API
* classes.
*
* For additional credits (generally to people who reported problems)
* see CREDITS file.
*/
/*
Copyright (c) 2010-2011, Advanced Micro Devices, Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following
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Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided with the distribution.
Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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If you use the software (in whole or in part), you shall adhere to all applicable U.S., European, and other export
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774), and E.U. Council Regulation (EC) No 1334/2000 of 22 June 2000. Further, pursuant to Section 740.6 of the EAR,
you hereby certify that, except pursuant to a license granted by the United States Department of Commerce Bureau of
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Regulations ("EAR"), you will not (1) export, re-export or release to a national of a country in Country Groups D:1,
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*/
package com.aparapi.examples.mandel;
import com.aparapi.Kernel;
import com.aparapi.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.util.List;
/**
* An example Aparapi application which displays a view of the Mandelbrot set and lets the user zoom in to a particular point.
*
* When the user clicks on the view, this example application will zoom in to the clicked point and zoom out there after.
* On GPU, additional computing units will offer a better viewing experience. On the other hand on CPU, this example
* application might suffer with sub-optimal frame refresh rate as compared to GPU.
*
* @author gfrost
*
*/
public class Main{
static {
System.setProperty("com.aparapi.dumpProfilesOnExit", "true");
// KernelManager.setKernelManager(new KernelManager() {
// @Override
// protected List getPreferredDeviceTypes() {
// return Collections.singletonList(Device.TYPE.CPU);
// }
// });
}
/**
* An Aparapi Kernel implementation for creating a scaled view of the mandelbrot set.
*
* @author gfrost
*
*/
public static class MandelKernel extends Kernel{
/** RGB buffer used to store the Mandelbrot image. This buffer holds (width * height) RGB values. */
private int[] rgb;
/** Mandelbrot image width. */
private int width;
/** Mandelbrot image height. */
private int height;
/** Maximum iterations for Mandelbrot. */
final private int maxIterations = 64;
/** Palette which maps iteration values to RGB values. */
@Constant final private int pallette[] = new int[maxIterations + 1];
/** Mutable values of scale, offsetx and offsety so that we can modify the zoom level and position of a view. */
private float scale = .0f;
private float offsetx = .0f;
private float offsety = .0f;
/**
* Initialize the Kernel.
*
* @param _width Mandelbrot image width
* @param _height Mandelbrot image height
* @param _rgb Mandelbrot image RGB buffer
*/
public MandelKernel(int _width, int _height, int[] _rgb) {
//Initialize palette values
for (int i = 0; i < maxIterations; i++) {
final float h = i / (float) maxIterations;
final float b = 1.0f - (h * h);
pallette[i] = Color.HSBtoRGB(h, 1f, b);
}
width = _width;
height = _height;
rgb = _rgb;
}
public void resetImage(int _width, int _height, int[] _rgb) {
width = _width;
height = _height;
rgb = _rgb;
}
public int getCount(float x, float y) {
int count = 0;
float zx = x;
float zy = y;
float new_zx = 0f;
// Iterate until the algorithm converges or until maxIterations are reached.
while ((count < maxIterations) && (((zx * zx) + (zy * zy)) < 8)) {
new_zx = ((zx * zx) - (zy * zy)) + x;
zy = (2 * zx * zy) + y;
zx = new_zx;
count++;
}
return count;
}
@Override public void run() {
/** Determine which RGB value we are going to process (0..RGB.length). */
final int gid = getGlobalId();
/** Translate the gid into an x an y value. */
final float x = ((((gid % width) * scale) - ((scale / 2) * width)) / width) + offsetx;
final float y = ((((gid / width) * scale) - ((scale / 2) * height)) / height) + offsety;
int count = getCount(x, y);
// Pull the value out of the palette for this iteration count.
rgb[gid] = pallette[count];
}
public void setScaleAndOffset(float _scale, float _offsetx, float _offsety) {
offsetx = _offsetx;
offsety = _offsety;
scale = _scale;
}
public int[] getRgbs() {
return rgb;
}
}
/** User selected zoom-in point on the Mandelbrot view. */
public static volatile Point to = null;
@SuppressWarnings("serial") public static void main(String[] _args) {
final JFrame frame = new JFrame("MandelBrot");
/** Width of Mandelbrot view. */
final int width = 768;
/** Height of Mandelbrot view. */
final int height = 768;
/** Mandelbrot image height. */
final Range range = Range.create(width * height);
/** Image for Mandelbrot view. */
final BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
final BufferedImage offscreen = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// Draw Mandelbrot image
final JComponent viewer = new JComponent(){
@Override public void paintComponent(Graphics g) {
g.drawImage(image, 0, 0, width, height, this);
}
};
// Set the size of JComponent which displays Mandelbrot image
viewer.setPreferredSize(new Dimension(width, height));
final Object doorBell = new Object();
// Mouse listener which reads the user clicked zoom-in point on the Mandelbrot view
viewer.addMouseListener(new MouseAdapter(){
@Override public void mouseClicked(MouseEvent e) {
to = e.getPoint();
synchronized (doorBell) {
doorBell.notify();
}
}
});
// Swing housework to create the frame
frame.getContentPane().add(viewer);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
// Extract the underlying RGB buffer from the image.
// Pass this to the kernel so it operates directly on the RGB buffer of the image
final int[] rgb = ((DataBufferInt) offscreen.getRaster().getDataBuffer()).getData();
final int[] imageRgb = ((DataBufferInt) image.getRaster().getDataBuffer()).getData();
// Create a Kernel passing the size, RGB buffer and the palette.
final MandelKernel kernel = new MandelKernel(width, height, rgb);
final float defaultScale = 3f;
// Set the default scale and offset, execute the kernel and force a repaint of the viewer.
kernel.setScaleAndOffset(defaultScale, -1f, 0f);
kernel.execute(range);
System.arraycopy(rgb, 0, imageRgb, 0, rgb.length);
viewer.repaint();
System.out.println("device=" + kernel.getTargetDevice());
// Window listener to dispose Kernel resources on user exit.
frame.addWindowListener(new WindowAdapter(){
@Override public void windowClosing(WindowEvent _windowEvent) {
kernel.dispose();
System.exit(0);
}
});
// Wait until the user selects a zoom-in point on the Mandelbrot view.
while (true) {
// Wait for the user to click somewhere
while (to == null) {
synchronized (doorBell) {
try {
doorBell.wait();
} catch (final InterruptedException ie) {
ie.getStackTrace();
}
}
}
float x = -1f;
float y = 0f;
float scale = defaultScale;
final float tox = ((float) (to.x - (width / 2)) / width) * scale;
final float toy = ((float) (to.y - (height / 2)) / height) * scale;
// This is how many frames we will display as we zoom in and out.
final int frames = 128;
final long startMillis = System.currentTimeMillis();
for (int sign = -1; sign < 2; sign += 2) {
for (int i = 0; i < (frames - 4); i++) {
scale = scale + ((sign * defaultScale) / frames);
x = x - (sign * (tox / frames));
y = y - (sign * (toy / frames));
// Set the scale and offset, execute the kernel and force a repaint of the viewer.
kernel.setScaleAndOffset(scale, x, y);
kernel.execute(range);
final List profileInfo = kernel.getProfileInfo();
if ((profileInfo != null) && (profileInfo.size() > 0)) {
for (final ProfileInfo p : profileInfo) {
System.out.print(" " + p.getType() + " " + p.getLabel() + " " + (p.getStart() / 1000) + " .. "
+ (p.getEnd() / 1000) + " " + ((p.getEnd() - p.getStart()) / 1000) + "us");
}
System.out.println();
}
System.arraycopy(rgb, 0, imageRgb, 0, rgb.length);
viewer.repaint();
}
}
final long elapsedMillis = System.currentTimeMillis() - startMillis;
System.out.println("FPS = " + ((frames * 1000) / elapsedMillis));
// Reset zoom-in point.
to = null;
}
}
}
