Using revision 0118
Mac OSX, powerbook

A small modification to the PGraphics example produces an error.

PGraphics pg;

void setup() {
size(200, 200);
pg = createGraphics(200, 200,P2D);
pg.beginDraw();
pg.rect(100,100,10,10);
pg.endDraw();
noLoop();
}

void draw() {
image(pg, 0, 0);
}

Error is as follows:

java.lang.NullPointerException
at processing.core.PGraphics2D.thin_pointAtIndex(PGraphics2D.java:1173)
at processing.core.PGraphics2D.thin_flat_line(PGraphics2D.java:1284)
at processing.core.PGraphics2D.rectImpl(PGraphics2D.java:716)
at processing.core.PGraphics.rect(PGraphics.java:1266)
at Temporary_1617_6745.setup(Temporary_1617_6745.java:8)
at processing.core.PApplet.handleDisplay(PApplet.java:1237)
at processing.core.PGraphics.requestDisplay(PGraphics.java:568)
at processing.core.PApplet.run(PApplet.java:1406)
at java.lang.Thread.run(Thread.java:552)

Seems to be failing on either the pixels array or the zbuffer array?

// expects offset/index in pixelbuffer array instead of x/y coords
// used by optimized parts of thin_flat_line() [toxi]
private void thin_pointAtIndex(int offset, float z, int color) {
pixels[offset] = color;
zbuffer[offset] = z;
}

P2D doesn't exist yet. you're probably looking for JAVA2D?

ah, i see the problem. we need to fix the reference since it should use P3D
(or JAVA2D). re-assigning to casey as a reference bug.

Ok, I still get an error with JAVA2D:

java.lang.NullPointerException
at java.lang.System.arraycopy(Native Method)
at
sun.awt.image.IntegerInterleavedRaster.setDataElements(IntegerInterleavedRaster.java:427)
at processing.core.PGraphicsJava2D.updatePixels(PGraphicsJava2D.java:1064)
at processing.core.PGraphicsJava2D.imageImpl(PGraphicsJava2D.java:578)
at processing.core.PGraphics.image(PGraphics.java:1997)
at processing.core.PApplet.image(PApplet.java:7074)
at Temporary_850_3963.draw(Temporary_850_3963.java:13)
at processing.core.PApplet.handleDisplay(PApplet.java:1311)
at processing.core.PGraphics.requestDisplay(PGraphics.java:568)
at processing.core.PApplet.run(PApplet.java:1406)
at java.lang.Thread.run(Thread.java:552)

However, if I add loadPixels & updatePixels, the error goes away, but
nothing is viewable onscreen?

PGraphics pg;

void setup() {
size(200, 200);
pg = createGraphics(200, 200,JAVA2D);
pg.loadPixels();
pg.beginDraw();
pg.background(0);
pg.stroke(255);
pg.noFill();
pg.rect(100,100,10,10);
pg.updatePixels();
pg.endDraw();
}

void draw() {
image(pg, 0, 0);
}

createGraphics() hasn't quite been worked out yet, need to fix things.
drawing images from createGraphics back to the screen doesn't work with
JAVA2D and only works sometimes with P3D.

the reference also needs to have P2D removed from the createGraphics
example, which has happened in subversion, but hasn't yet been update on
the processing site or in the download.

The createGraphics() reference entry is now updated on the site

createGraphics() should be repaired for 0120. it now properly handles (by
default) an ARGB drawing surface that's transparent, and can subsequently
be drawn back into another PGraphics as necessary.

I hope I am not raising alarm too soon but I have tested todays code in
subversion to see if I still have the problem I described in ...

http://processing.org/discourse/yabb_beta/YaBB.cgi?board=SoftwareBugs;action=display;num=1162572625

Unfortunatly the problem is still there.

then it's a different issue, please file a new bug for it because this one
has been closed and fixed.

http://dev.processing.org/bugs/show_bug.cgi?id=428

I have also uploaded the script here.

Before I logged the bug here Im afraid I logged in the wrong place i.e.
http://processing.org/discourse/yabb_beta/YaBB.cgi?board=SoftwareBugs;action=display;num=1162572625

... so I might have confused things a bit. Sorry, next time will be better.

Keep up the good work :)