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Topic: Using p5 in standalone app (Read 1505 times) |
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pbarry
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Using p5 in standalone app
« on: Aug 6th, 2004, 11:38pm » |
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Hi, I'm using p5 as just one of many additional jars in a social network visualization program. My main class makes a JFrame that has my class that extends BApplet as its only component. My program works fine inside eclipse, but when I try to export the code as a jar, I can no longer access any of the images (that are dynamically downloaded at runtime) through p5's loadImage. What seems to be happening is that all of a sudden, the getClass().getResource("...") calls inside BGraphics all return null whenever any resource is attempted to be gotten, even simply requesting the "." resource failed when I tried g.getClass().getResource() in my BApplet extending class (that works in eclipse too). Does anyone know what I need to do to the BGraphics object to enable it to grab my images into BImages? Any help would be greatly appreciated.
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fjen
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Re: Using p5 in standalone app
« Reply #1 on: Aug 7th, 2004, 2:06pm » |
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can you supply some code that gives the same error?
Quote:| (that are dynamically downloaded at runtime) |
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loadImage(URL) or loadImage(file) ?
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pbarry
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Re: Using p5 in standalone app
« Reply #2 on: Aug 7th, 2004, 5:11pm » |
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The images are downloaded to files via java's net stuff, since I want to cache them and not force a download every time the program runs. After they're downloaded, I'm trying to use loadImage(file).
As for some test code, here's a far dumbed down applet that just tries to load in a picture file:
public class ImageLoadingTestApplet extends BApplet {
BImage bimage;
void setup() {
size(100,100);
System.out.println("graphics.getClass().getResource(\".\") => "+g.getClass().getResource("."));
bimage = loadImage("test.jpg");
}
void loop() {
background(255);
image(bimage, 10, 20);
}
}
And my main method in a little Main class is this:
public static void main(String[] args) {
try {
JFrame frame = new JFrame();
JPanel panel = new JPanel();
BApplet applet = new ImageLoadingTestApplet();
applet.init();
applet.start();
panel.setLayout(new BorderLayout());
panel.add(applet, BorderLayout.CENTER);
frame.getContentPane().add(panel);
frame.pack();
frame.setTitle("Test of loadImage");
frame.show();
applet.requestFocus();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
}
And this successfully runs from within eclipse, (that system.out.println prints out the 'bin' directory under my eclipse project), but when I export this to a jar (with the p5 jars in the classpath when I run it), it can't load the image (I've tried putting it in several different directories for p5 to find it in). The output is:
prompt> java -jar SNB.jar
graphics.getClass().getResource(".") => null
could not load image test.jpg
Error while running applet.
java.lang.NullPointerException
at BGraphics.flat_image(BGraphics.java:3211)
at BGraphics.image(BGraphics.java:4202)
at BApplet.image(BApplet.java:2765)
at ImageLoadingTestApplet.loop(ImageLoadingTestApplet.java:21)
at BApplet.nextFrame(BApplet.java:434)
at BApplet.run(BApplet.java:369)
at java.lang.Thread.run(Unknown Source)
Is that enough detail? Thanks for the quick reply!
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fjen
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Re: Using p5 in standalone app
« Reply #3 on: Aug 7th, 2004, 6:54pm » |
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same error for me (os-x, p 68, java 1.4+) ... funny. i'm quite sure i've been loading images from sketches run as .jar before.
here is my workaround:
"test.jpg" is placed next to the .jar
"dummy.jpg" is inside the .jar (from where i can load images)
Code:
BImage bimage;
void setup()
{
size(100,100);
bimage = loadImageJAR("test.jpg");
}
void loop()
{
background(255);
image(bimage, 0, 0);
}
BImage loadImageJAR (String image_name)
{
Toolkit toolkit = Toolkit.getDefaultToolkit();
Image img = toolkit.getImage( image_name );
// dummy image from inside .jar//
BImage dummy = loadImage("dummy.jpg");
try
{
PixelGrabber grabber = new PixelGrabber(img, 0, 0, -1, -1, true);
if (grabber.grabPixels())
{
dummy.width = grabber.getWidth();
dummy.height = grabber.getHeight();
dummy.pixels = (int []) grabber.getPixels();
}
else
{
System.out.println("Error grabbing Pixels");
}
} catch (InterruptedException e) {
e.printStackTrace();
}
return dummy;
}
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/F
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| « Last Edit: Aug 7th, 2004, 7:55pm by fjen » |
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pbarry
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Re: Using p5 in standalone app
« Reply #4 on: Aug 9th, 2004, 1:26am » |
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THANKS SO MUCH!! If you're interested to see the project you helped out, check out
http://patrickbarry.com/projects/ljnet/
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