DitherTestpublic class DitherTest extends Applet implements Runnable
| Fields Summary |
|---|
| static final int | NOOP | | static final int | RED | | static final int | GREEN | | static final int | BLUE | | static final int | ALPHA | | static final int | SATURATION | | ThreadGroup | appletThreadGroup | | Thread | kicker | | DitherControls | XControls | | DitherControls | YControls | | DitherCanvas | canvas |
| Methods Summary |
|---|
| void | applymethod(int[] c, int method, int step, int total, int[] vals)
if (method == NOOP)
return;
int val = ((total < 2)
? vals[0]
: vals[0] + ((vals[1] - vals[0]) * step / (total - 1)));
switch (method) {
case RED:
c[0] = val;
break;
case GREEN:
c[1] = val;
break;
case BLUE:
c[2] = val;
break;
case ALPHA:
c[3] = val;
break;
case SATURATION:
int max = Math.max(Math.max(c[0], c[1]), c[2]);
int min = max * (255 - val) / 255;
if (c[0] == 0) c[0] = min;
if (c[1] == 0) c[1] = min;
if (c[2] == 0) c[2] = min;
break;
}
| | int | colormethod(java.lang.String s, int[] vals)
int method = NOOP;
if (s == null)
s = "";
String lower = s.toLowerCase();
int len = 0;
if (lower.startsWith("red")) {
method = RED;
lower = lower.substring(3);
} else if (lower.startsWith("green")) {
method = GREEN;
lower = lower.substring(5);
} else if (lower.startsWith("blue")) {
method = BLUE;
lower = lower.substring(4);
} else if (lower.startsWith("alpha")) {
method = ALPHA;
lower = lower.substring(4);
} else if (lower.startsWith("saturation")) {
method = SATURATION;
lower = lower.substring(10);
}
if (method == NOOP) {
vals[0] = 0;
vals[1] = 0;
return method;
}
int begval = 0;
int endval = 255;
try {
int dash = lower.indexOf('-");
if (dash < 0) {
begval = endval = Integer.parseInt(lower);
} else {
begval = Integer.parseInt(lower.substring(0, dash));
endval = Integer.parseInt(lower.substring(dash+1));
}
} catch (Exception e) {
}
if (begval < 0) begval = 0;
if (endval < 0) endval = 0;
if (begval > 255) begval = 255;
if (endval > 255) endval = 255;
vals[0] = begval;
vals[1] = endval;
return method;
| | public void | init()
String xspec, yspec;
int xvals[] = new int[2];
int yvals[] = new int[2];
try {
xspec = getParameter("xaxis");
} catch (Exception e) {
xspec = null;
}
try {
yspec = getParameter("yaxis");
} catch (Exception e) {
yspec = null;
}
if (xspec == null) xspec = "red";
if (yspec == null) yspec = "blue";
int xmethod = colormethod(xspec, xvals);
int ymethod = colormethod(yspec, yvals);
setLayout(new BorderLayout());
XControls = new DitherControls(this, xvals[0], xvals[1],
xmethod, false);
YControls = new DitherControls(this, yvals[0], yvals[1],
ymethod, true);
YControls.addRenderButton();
add("North", XControls);
add("South", YControls);
add("Center", canvas = new DitherCanvas());
appletThreadGroup = Thread.currentThread().getThreadGroup();
| | public static void | main(java.lang.String[] args)
Frame f = new Frame("DitherTest");
DitherTest ditherTest = new DitherTest();
ditherTest.init();
f.add("Center", ditherTest);
f.pack();
f.show();
ditherTest.start();
| | synchronized void | newImage(java.lang.Thread me, int width, int height, int[] pixels)
if (kicker != me) {
return;
}
Image img;
img = createImage(new MemoryImageSource(width, height,
ColorModel.getRGBdefault(),
pixels, 0, width));
canvas.setImage(img);
kicker = null;
| | public void | restart()
stop();
canvas.setImage(null);
start();
| | public void | run()
Thread me = Thread.currentThread();
me.setPriority(3);
int width = canvas.size().width;
int height = canvas.size().height;
int xvals[] = new int[2];
int yvals[] = new int[2];
int xmethod = XControls.getParams(xvals);
int ymethod = YControls.getParams(yvals);
int pixels[] = new int[width * height];
int c[] = new int[4];
int index = 0;
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; i++) {
c[0] = c[1] = c[2] = 0;
c[3] = 255;
if (xmethod < ymethod) {
applymethod(c, xmethod, i, width, xvals);
applymethod(c, ymethod, j, height, yvals);
} else {
applymethod(c, ymethod, j, height, yvals);
applymethod(c, xmethod, i, width, xvals);
}
pixels[index++] = ((c[3] << 24) |
(c[0] << 16) |
(c[1] << 8) |
(c[2] << 0));
if (kicker != me) {
return;
}
}
}
newImage(me, width, height, pixels);
| | public synchronized void | start()
if (canvas.getImage() == null) {
kicker = new Thread(appletThreadGroup, this);
kicker.start();
}
| | public synchronized void | stop()
try {
if (kicker != null) {
kicker.stop();
}
} catch (Exception e) {
}
kicker = null;
|
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