textFont() required?

Core Library Questions

akiersky

in Core Library Questions • 2 years ago

Hi All,

Ive been working all day with no problems, but suddenly I am getting errors about having to call textFont() before any text(). Im fine adding it, but when I do I get another series of errors about using a library that is not compatible with this version of processing:

Exception in thread "Animation Thread" java.lang.NoSuchMethodError:

processing.core.PImage.getCache(Lprocessing/core/PGraphics;)Ljava/lang/Object;

at processing.opengl.PGraphicsOpenGL.bindTexture(PGraphicsOpenGL.java:821)

at codeanticode.glgraphics.GLGraphics.renderTriangles(Unknown Source)

at processing.core.PGraphics3D.endShape(PGraphics3D.java:633)

at processing.core.PGraphics.endShape(PGraphics.java:1153)

at processing.core.PGraphics.imageImpl(PGraphics.java:2293)

at processing.core.PGraphics.image(PGraphics.java:2182)

at processing.core.PApplet.image(PApplet.java:7280)

at C12$Tweet.drawTweet(C12.java:777)

at C12$TwitterStreamThread.moveDown(C12.java:907)

at C12$TwitterStreamThread.newTweet(C12.java:892)

at C12$TwitterStreamThread.getTimeline(C12.java:855)

at C12$TwitterStreamThread.<init>(C12.java:840)

at C12.setup(C12.java:105)

at processing.core.PApplet.handleDraw(PApplet.java:1402)

at processing.core.PApplet.run(PApplet.java:1327)

at java.lang.Thread.run(Thread.java:680)

From what I can tell, this error is thrown when I try to draw a PGraphics to stage with image(). is there some issue with using fonts in PGraphic buffers? is there a way around this?

Thanks!

Replies(10)

akiersky

Re: textFont() required?

2 years ago

Ok, I reverted everything back to where it was before I was having issues, and I am still getting

Exception in thread "Animation Thread" java.lang.RuntimeException: Use textFont() before text()

at processing.core.PGraphics.showTextFontException(PGraphics.java:5014)

at processing.core.PGraphics.text(PGraphics.java:2705)

at C12$StatusPost.createPost(C12.java:666)

at C12$TwitterStreamThread.newTweet(C12.java:801)

at C12$TwitterStreamThread.getTimeline(C12.java:774)

at C12$TwitterStreamThread.<init>(C12.java:759)

at C12.setup(C12.java:104)

at processing.core.PApplet.handleDraw(PApplet.java:1402)

at processing.core.PApplet.run(PApplet.java:1327)

at java.lang.Thread.run(Thread.java:680)

I have not gotten that in the last week I have been working with this same project, with text and all.

I have tested other pde's that use text, in fact the experiment sketches I used before copying to my master project, and they all work fine, so it is only an issue with this one project.

so confused.... :/

cedrickie..

Re: textFont() required?

2 years ago

can you post some example code that illustrates the problem?

akiersky

Re: textFont() required?

2 years ago

its getting to be a pretty big project, but here's the some snippits for where the error is happening:

Class TwitterStreamThread:

import twitter4j.auth.*;
import twitter4j.internal.http.*;
import twitter4j.*;
TwitterStream twitter;
UserStream userStream;
UserStreamListener tweetStream;
Twitter twitterTimeline;
List timelineTweets;
ArrayList tweets;
// my (akiersky) creds:
String consumer_key = "XXXXXXXXXXXXXXXXXX";
String consumer_secret = "XXXXXXXXXXXXXXXXXX";
String oauth_token = "XXXXXXXXXXX-XXXXXXXXXXXXXXXXXX";
String oauth_token_secret = "XXXXXXXXXXXXXXXXXX";
C12UserStreamListener c12usl;
Thread thread;
public Boolean twitterview = false;
public class TwitterStreamThread extends Thread {
private boolean running;
private int wait;
private String id;
private int count;
public TwitterStreamThread(int w, String s) {
wait = w;
running = false;
id = s;
count = 0;
tweets = new ArrayList();
c12usl = new C12UserStreamListener();
c12usl.setParent(this);
twitter = new TwitterStreamFactory().getInstance();
twitter.setOAuthConsumer(consumer_key, consumer_secret);
twitter.setOAuthAccessToken(new AccessToken( oauth_token, oauth_token_secret) );
try {
userStream = twitter.getUserStream();
}
catch(TwitterException e) {
println(e.getStatusCode());
}
getTimeline();
registerDraw(this);
}
public void getTimeline() {
try {
twitterTimeline = new TwitterFactory().getInstance();
twitterTimeline.setOAuthConsumer(consumer_key, consumer_secret);
twitterTimeline.setOAuthAccessToken(new AccessToken( oauth_token, oauth_token_secret) );
timelineTweets = twitterTimeline.getHomeTimeline();
for(int i=5; i>=0; i--) {
Status t = (Status)timelineTweets.get(i);
newTweet(t);
}
} catch (TwitterException e) {}
}
public void start() {
running = true;
println("thread started and will run with this many ms between calls: "+ wait);
super.start();
}
public void run() {
while (running) {
try {
userStream.next(c12usl);
}
catch(Exception e) {
}
}
}
public void newTweet (Status status) {
StatusPost sp = new StatusPost(status.getUser().getScreenName(), status.getText(), status.getCreatedAt(), status.getUser().getProfileImageURL().toString());
PGraphics buf = sp.createPost();
Tweet tw = new Tweet(0, -buf.height, buf);
tweets.add(tw);
moveDown(buf.height);
}
public void twitterView() {
twitterview = true;
}
public void draw() {
if(twitterview) {
moveDown(0);
}
}
public void moveDown(int moveDist) {
for( int i = 0; i< tweets.size(); i++) {
Tweet t = (Tweet)tweets.get(i);
t.drawTweet(moveDist);
}
}
public void quit() {
running = false;
interrupt();
}
}

Class C12UserStreamListener :

import twitter4j.*;
import org.json.*;
TwitterStreamThread parent;
public class C12UserStreamListener implements UserStreamListener {
public C12UserStreamListener() {
}
void setParent(TwitterStreamThread _parent) {
parent = _parent;
}
void onBlock(User source, User blockedUser) {
}
void onDeletionNotice(long directMessageId, long userId) {
}
void onDirectMessage(DirectMessage directMessage) {
}
void onFavorite(User source, User target, Status favoritedStatus) {
}
void onFollow(User source, User followedUser)
{
}
void onFriendList(long[] friendIds)
{
}
void onRetweet(User source, User target, Status retweetedStatus)
{
}
void onUnblock(User source, User unblockedUser)
{
}
void onUnfavorite(User source, User target, Status unfavoritedStatus)
{
}
void onUserListCreation(User listOwner, UserList list) {
}
void onUserListDeletion(User listOwner, UserList list) {
}
void onUserListMemberAddition(User addedMember, User listOwner, UserList list)
{
}
void onUserListMemberDeletion(User deletedMember, User listOwner, UserList list)
{
}
void onUserListSubscription(User subscriber, User listOwner, UserList list)
{
}
void onUserListUnsubscription(User subscriber, User listOwner, UserList list)
{
}
void onUserListUpdate(User listOwner, UserList list)
{
}
void onUserProfileUpdate(User updatedUser) {
}
void onDeletionNotice(StatusDeletionNotice statusDeletionNotice)
{
}
void onScrubGeo(long userId, long upToStatusId)
{
}
void onStatus(Status status) {
println(status.getUser().getScreenName());
println(status.getText());
println(status.getCreatedAt());
println(status.getUser().getProfileImageURL());
parent.newTweet(status);
}
void onTrackLimitationNotice(int numberOfLimitedStatuses) {
}
void onException(java.lang.Exception ex) {
}
}

Class StatusPost:

public class StatusPost {
import java.util.Date;
import java.net.URL;
PFont font;
String username;
String post;
Date postTime;
String picURL;
PImage img;
StatusPost(String _username, String _post, Date _postTime, String _picURL) {
username = _username;
post = _post;
postTime = _postTime;
picURL = _picURL;
img = loadImage(picURL);
}
PGraphics createPost () {
PGraphics buf = createGraphics(500, 85, JAVA2D);
font = createFont("SansSerif", 11);
float UNheight = 18;
buf.beginDraw();
buf.smooth();
buf.noFill();
buf.noStroke();
buf.fill(83, 212, 255);
buf.rect(0, 0, 5, 75);
buf.image(img, 10, 0);
buf.fill(0,0,200);
buf.textFont(font);
buf.text(username, 70, 10);
buf.fill(0);
buf.text(post, 70, UNheight, 400, 60);
buf.fill(150);
buf.text(postTime.toString(), 12, 65);
buf.stroke(100);
buf.line(10, 75, 500, 75);
buf.endDraw();
println("post was posted");
return buf;
}
}

Class Tweet: The Error is thrown when I call image();

class Tweet {
public int xx;
public int yy;
public PGraphics tw;
public Tweet (int _x, int _y, PGraphics tweetBuffer) {
xx = _x;
yy = _y;
tw = tweetBuffer;
}
public void drawTweet (int amountToMove) {
//error happens here:
println("about to draw to stage");
image(tw, xx, yy+=amountToMove);
println("success!");
}
}

From main setup:

TwitterStreamThread tst;
size(w, h, GLConstants.GLGRAPHICS);
tst = new TwitterStreamThread(1000, "tweets");
tst.start();

Any help would be great!

thanks,

cedrickie..

Re: textFont() required?

2 years ago

i was actually hoping for some small code that just recreates your text problem...
with all that libraries and classes its hard to test... looking through the code i couldnt spot any obvious problem so far

akiersky

Re: textFont() required?

2 years ago

yeah, sorry, it's a pretty integrated project. fun though :) just not now...

So the error happens in the Tweet class here:

public void drawTweet (int amountToMove) {
//error happens here:
println("about to draw to stage");
image(tw, xx, yy+=amountToMove);
println("success!");
}

where I try to draw the PGraphic image buffer (tw) to stage. It seems to not work if I put a PImage in instead. I see the "about to draw to stage" then this error spits out:

Exception in thread "Animation Thread" java.lang.NoSuchMethodError:

processing.core.PImage.getCache(Lprocessing/core/PGraphics;)Ljava/lang/Object;
...

Which I believe is the image() method trying to convert the PGraphics to a PImage with the getCache() method, which I have found in the JavaDocs ( link). I have also tried doing the conversion myself and passing a PImage to the draw, but with the same results.

One thing that could be causing errors is the fact that the main MODE is GLConstants.GLGRAPHICS, and the PGraphics is JAVA2D. I have tried changing the JAVA2D to all the other options, with no luck. Im stuck with the GLGraphics for other parts of the app. Looking at the error chain (in my first post) it looks like glgraphics may be part of the problem:

at codeanticode.glgraphics.GLGraphics.renderTriangles(Unknown Source)

ill look further into that.

quite a tangled mess I have going here...

Thanks for looking!
ak

PhiLho

Re: textFont() required?

2 years ago

What version of Processing do you use?

akiersky

Re: textFont() required?

2 years ago

version 1.5.1 of processing, glgraphics .99 on OS X 10.6.7

akiersky

Re: textFont() required?

2 years ago

it looks like it is defanitely a problem in the getCache() method of PImage. Im not sure if it is the way I am using it, or a larger problem needing an official bug report.

Ive tried different renderers (OPENGL, P2D, P3D, etc), and get the same error.

I have also done the PGraphics to PImage conversion myself with the get() method, same error once it tries to draw that image to the screen.

I can call the getCache method on the PImage I create, and it returns 'null', looking at the docs, this should be a valid return and will create a PGraphics renderer.

seeming like a bug...

thanks,

akiersky

Re: textFont() required?

2 years ago

OK.

so I rebuilt everything one step at a time to try to isolate the problem and I think I may have found something. everything with the twitter feeding (may or may not have to do with the twitter4j lib) works great until I import the processing.xml.*; lib. then it spits out the error :

Exception in thread "Animation Thread" java.lang.NoSuchMethodError: processing.core.PImage.getCache(Lprocessing/core/PGraphics;)Ljava/lang/Object;

which is strange as I am not using the xml lib in this project yet. I was using it in another part of the project, but maybe I can avoid it. I am using the twitter4j lib and a json.org for data import, which could be competing?

here's a bare minimum code example showing where the problem is if anyone wants to experiment (libraries included!): http://dl.dropbox.com/u/4933598/MinimalTest.zip

Try commenting out the xml import at the top to see the error. also, as this thread was started, if the textFont() is removed, it seems to require it. (maybe to create bitmaps of the text to later draw to the stage?)

I can change all the renderers to JAVA2D, and use the PGraphics buffer with no problems at all, but OPENGL gives the same problem.

Seems that OPENGL offscreen buffers do not play well with processing.xml.

andres

Re: textFont() required?

2 years ago

Hello, I run your minimal test on the same configuration you reported earlier ( processing 1.5.1, glgraphics 0.99 , OS X 10.6.7), and the only problem I found so far is that you redeclare the font variable inside setup(). Because of this, the global font variable doesn't get properly initialized, leading to a crash. The following code works fine for me:

import codeanticode.glgraphics.*;
import processing.opengl.*;
GLGraphicsOffScreen buf;
PFont font;
void setup() {
size(250, 250, GLConstants.GLGRAPHICS);
buf = new GLGraphicsOffScreen(this, 200, 200);
font = createFont("SansSerif", 12);
}
void draw() {
buf.beginDraw();
buf.background(255);
buf.smooth();
buf.noFill();
buf.noStroke();
buf.fill(0);
buf.textFont(font);
buf.text("Hello, World!", 50, 50);
buf.endDraw();
image(buf.getTexture(), 20, 20);
}

Also note that the xml library doesn't actually exist. The xml functionality is part of the core and can be used without importing any library. Adding the import processing.xml.* at the beginning just results in the warning message "No library found for processing.xml", but the sketch still runs fine.

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