text + OpenGL + window resize = fucked up text

Core Library Questions

ochnoe

text + OpenGL + window resize = fucked up text

in Core Library Questions • 2 years ago

hi,

I have a problem with text in combination with using opengl and resizing the window.

everything looks like it should until I resize the window -- afterwards all the glyphs are just white rectangles.

I'd like to change that, but don't know how. the code below is the result of copy and pasting stuff from different sources, so maybe there is something I'm not aware of.

thanks a lot in advance!

import java.awt.event.*;
import controlP5.*;
import processing.opengl.*;
import javax.media.opengl.*;
ControlP5 controlP5;
int x0, y0;
void setup() {
frame.setResizable(true);
size(1500, 800, OPENGL);
frameRate(30);
x0 = width / 2;
y0 = height / 2;
frame.addComponentListener(new ComponentAdapter() {
public void componentResized(ComponentEvent e) {
if (e.getSource()==frame) {
frame.setSize(frame.getWidth(), frame.getHeight());
x0 = frame.getWidth() / 2;
y0 = frame.getHeight() / 2;
}
}
}
);
noSmooth();
hint(ENABLE_OPENGL_4X_SMOOTH);
controlP5 = new ControlP5(this);
controlP5.setAutoDraw(false);
controlP5.addButton("button",10,100,80,80,20);
}
void draw() {
//hint(ENABLE_NATIVE_FONTS);
//textMode(SCREEN);
background(200);
hint(ENABLE_DEPTH_TEST);
pushMatrix();
fill(255);
ellipse(x0, y0, 100, 100);
popMatrix();
hint(DISABLE_DEPTH_TEST);
controlP5.draw();
}

Replies(12)

ochnoe

Re: text + OpenGL + window resize = fucked up text

2 years ago

or would you say that a native java application would be a wiser approach to building a resizable 3D app with controls?

andreas.s..

Re: text + OpenGL + window resize = fucked up text

2 years ago

when i use your code above and resize the window, the textures which are used to render text turn all white and lose their alpha channel information - happens for PFont fonts as well.

if you need controls, maybe an extra window only for controllers helps? for example ControlP5window

ochnoe

Re: text + OpenGL + window resize = fucked up text

2 years ago

an extra window would be a workaround for the desktop, but I would like to use my program as an applet as well.

maybe setting the window size only once during setup is enough -- looks like http://wiki.processing.org/w/Setting_width/height_dynamically will be helpful.

but again, that would be just working around the problem I described. I don't know if this is a bug, but if it is, it should probably be investigated.

motscousus

Re: Re: text + OpenGL + window resize = fucked up text

2 years ago

i had a similar problem with Text rendered using
textFont(TextDrawer.font,fontsize);
fill( p.foregroundR, p.foregroundG, p.foregroundB,p.fgAlpha.v()*255);
text(p.text,Config.WIDTH-app.textWidth(p.text)/2,Config.HEIGHT+fontsize/2);

after i resize the window, all letters are rendered as a big square. i'm not 100% sure, but to me that look more like a processing bug. i'll check tonigh with the lastest processing build.

henri

ochnoe

Re: text + OpenGL + window resize = fucked up text

2 years ago

I just ran the code with version 0195, but the problem still persists.

raykroc89

Re: text + OpenGL + window resize = fucked up text

2 years ago

Hi ochnoe,

I also had the same outcome when I ran it on version 0195. Any idea how to solve the problem?

Thanks.
Ray
Earth 4 Energy

ochnoe

Re: text + OpenGL + window resize = fucked up text

2 years ago

unfortunately I don't know enough about OpenGL and/or the internals of processing to have an idea where to start looking ...

ochnoe

Re: text + OpenGL + window resize = fucked up text

2 years ago

should I report a bug in that case?

forexampl..

Re: Re: text + OpenGL + window resize = fucked up text

2 years ago

yes, please

amnon.owed

Re: text + OpenGL + window resize = fucked up text

2 years ago

Using textMode(SCREEN) solves this issue in Processing 1.5.1.

Code Example

// 1. resize the window => result: text becomes white rectangles
// 2. press space bar to toggle SCREEN => result: the text is looking good again
import processing.opengl.*;
boolean s;
void setup() {
frame.setResizable(true);
size(400, 400, OPENGL);
textFont(createFont("Arial", 50));
}
void draw() {
background(200);
if (s) { textMode(SCREEN); }
else { textMode(MODEL); }
text("some text", 75, 200);
}
void keyPressed() {
if (key == ' ') { s = !s; }
}

eugene.de..

Re: Re: text + OpenGL + window resize = fucked up text

2 years ago

It does for text, but now images disappear !

thanks for your reply.

jeff_g

Re: text + OpenGL + window resize = fucked up text

2 years ago

I've run into this problem before. OpenGL doesn't like to be resized, the textures get all messed up. We're hoping that this will be fixed with the transition to JOGL 2 and the new OpenGL engine due in Processing 2.0. If you want to test it, you can download a build version from the code site. Last I tested, resizing still didn't work quite right, but maybe Andres fixed it. I know it was on the radar.

- Jeff

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