Java-Gaming.org Hi !
Featured games (83)
games approved by the League of Dukes
Games in Showcase (541)
Games in Android Showcase (133)
games submitted by our members
Games in WIP (603)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Texture.getImageWidth() / getImageHeight()  (Read 1174 times)
0 Members and 1 Guest are viewing this topic.
Offline Zig-Zag

Senior Newbie





« Posted 2007-03-05 23:10:32 »

I'm trying to get my Tiles working unter jogl.

I'm loading the Tileimage with the TextureIO class like
1  
2  
file = new File("res/set1.png");
texture = TextureIO.newTexture(file, true);

and try to render them to a quad with
1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
14  
15  
16  
texture.enable();
texture.bind();
gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE,   GL.GL_REPLACE);
TextureCoords coords = texture.getImageTexCoords();

gl.glBegin(GL.GL_QUADS);
gl.glTexCoord2f(coords.left(), coords.bottom());
gl.glVertex2f(0, 0);
gl.glTexCoord2f(coords.right(), coords.bottom());
gl.glVertex2f(texture.getImageWidth(), 0);
gl.glTexCoord2f(coords.right(), coords.top());
gl.glVertex2f(texture.getImageWidth(), texture.getImageHeight());
gl.glTexCoord2f(coords.left(), coords.top());
gl.glVertex2f(0, texture.getImageHeight());
gl.glEnd();
texture.disable();

viewport is set up with glu.gluOrtho2D(0, 800, 0, 600); all the rest is form the JOGL demos.texture.

set1.png is 529x387 pixel and I thougt getImageWidth() and getImageHeight would give me those values, instead the return me the same values as getWidth() (1024) and getHeight() (512). trying to get subImages form this Texture with the right Dimension don't even compile.

Can somebody please tell me what wrong with my code?

Offline Ken Russell

JGO Coder




Java games rock!


« Reply #1 - Posted 2007-03-06 05:17:08 »

The mipmap generation process is causing your top-level image to be rescaled to the next largest power of two along the x and y dimensions. You should be able to get the dimensions you're looking for by creating a TextureData out of the file, querying it for its width and height, and then creating a Texture object from it; you can discard the TextureData immediately afterward.
Offline Zig-Zag

Senior Newbie





« Reply #2 - Posted 2007-03-09 06:15:38 »

Thank for the hint!

Since I only use them for 2D purposes I just create them without mipmap generation and it works fine for me so far.
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

Mr.CodeIt (6 views)
2014-12-27 04:03:04

TheDudeFromCI (12 views)
2014-12-27 02:14:49

Mr.CodeIt (25 views)
2014-12-23 03:34:11

rwatson462 (56 views)
2014-12-15 09:26:44

Mr.CodeIt (46 views)
2014-12-14 19:50:38

BurntPizza (92 views)
2014-12-09 22:41:13

BurntPizza (113 views)
2014-12-08 04:46:31

JscottyBieshaar (83 views)
2014-12-05 12:39:02

SHC (94 views)
2014-12-03 16:27:13

CopyableCougar4 (102 views)
2014-11-29 21:32:03
Resources for WIP games
by kpars
2014-12-18 10:26:14

Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!