Binding Texture exception~~

OpenGL Development JOGL Development
#1

hi~
I now want to map a texture on the object with following code:

[b] private BufferedImage readPNGImage(String resourceName) {
try {
BufferedImage img = ImageIO.read(getClass().getClassLoader().getResourceAsStream(resourceName));
if (img == null) {
throw new RuntimeException("Error reading resource " + resourceName);
}
return img;
} catch (IOException e) {
throw new RuntimeException(e);
}
}

private void makeRGBTexture(GL gl, GLU glu, BufferedImage img, int target, boolean mipmapped) {
ByteBuffer dest = null;
switch (img.getType()) {
case BufferedImage.TYPE_3BYTE_BGR:
case BufferedImage.TYPE_CUSTOM: {
byte[] data = ((DataBufferByte) img.getRaster().getDataBuffer()).getData();
dest = ByteBuffer.allocateDirect(data.length);
dest.order(ByteOrder.nativeOrder());
dest.put(data, 0, data.length);
break;
}

case BufferedImage.TYPE_INT_RGB: {
  int[] data = ((DataBufferInt) img.getRaster().getDataBuffer()).getData();
  dest = ByteBuffer.allocateDirect(data.length * BufferUtils.SIZEOF_INT);
  dest.order(ByteOrder.nativeOrder());
  dest.asIntBuffer().put(data, 0, data.length);
  break;
}

default:
  throw new RuntimeException("Unsupported image type " + img.getType());
}

if (mipmapped) {
  glu.gluBuild2DMipmaps(target, GL.GL_RGB8, img.getWidth(), img.getHeight(), GL.GL_RGB,
                        GL.GL_UNSIGNED_BYTE, dest);
} else {
  gl.glTexImage2D(target, 0, GL.GL_RGB, img.getWidth(), img.getHeight(), 0,
                  GL.GL_RGB, GL.GL_UNSIGNED_BYTE, dest);
}

}[/b]
but throw following exception ???

[b]java.lang.RuntimeException: Unsupported image type 13

  at jogltest.Main.makeRGBTexture(Main.java:223)

  at jogltest.Main.init(Main.java:50)

  at net.java.games.jogl.impl.GLDrawableHelper.init(GLDrawableHelper.java:68)

  at net.java.games.jogl.GLCanvas$InitAction.run(GLCanvas.java:187)

  at net.java.games.jogl.impl.windows.WindowsGLContext.makeCurrent(WindowsGLContext.java:144)

  at net.java.games.jogl.impl.windows.WindowsOnscreenGLContext.makeCurrent(WindowsOnscreenGLContext.java:110)

  at net.java.games.jogl.impl.GLContext.invokeGL(GLContext.java:162)

  at net.java.games.jogl.GLCanvas.reshape(GLCanvas.java:105)

  at java.awt.Component.setBounds(Component.java:1664)

  at java.awt.BorderLayout.layoutContainer(BorderLayout.java:691)

  at java.awt.Container.layout(Container.java:1020)

  at java.awt.Container.doLayout(Container.java:1010)

  at java.awt.Container.validateTree(Container.java:1092)

  at java.awt.Container.validateTree(Container.java:1099)

  at java.awt.Container.validateTree(Container.java:1099)

  at java.awt.Container.validateTree(Container.java:1099)

  at java.awt.Container.validate(Container.java:1067)

  at java.awt.Window.show(Window.java:461)

  at jogltest.Applet1.jbInit(Applet1.java:41)

  at jogltest.Applet1.init(Applet1.java:31)

  at com.borland.jbuilder.runtime.applet.AppletTestbed.startApplet(Unknown Source)

  at com.borland.jbuilder.runtime.applet.AppletTestbed.main(Unknown Source)[/b]

Can someone help me to slve this problem…thank~~

#2

Sorry for not coming up with any solution~

I encountered exactly the same problem when applying certain .png images, when others work fine. I need to load an image with transparent background, however, if I make a png image with transparent background I encounter this problem too.

What is the solution to this problem, and is there an easier way to make transparent backgrounds?

Thanks for your time,

Emil Olofsson

#3

Please upgrade to the latest JOGL nightly build on the JOGL home page and try the new TextureIO classes in com.sun.opengl.util.texture. They should be able to handle this with just a couple of lines of code, alpha channels included.

#4

The problem is that the code don’t support all the BufferedImage types. I think it would be a good idee to use BufferedImage.getRGB() in the default case, and treat the image as if it has a alpha channel.

#5

We came up with a solution to this problem today. However, when we tried to apply a transparent background, the whole image turned up more or less transparent. We’d like to make certain colors transparent, such as 0.0f, 0.0f, 0.0f = 100% alpha, and the rest is normal.