Cubemap from dds images

Troubleshooting General Help
1

Hello,



There is a serious bug in loading compressed (like DDS) images as cubemap faces.



The error is in LWJGLTextureState.java (int JOGL too) around line 743:



Here is what we got for cubemap:



ARBTextureCompression.glCompressedTexImage2DARB(

          getGLCubeMapFace(face),

          m,

          TextureStateRecord

          .getGLDataFormat(image

          .getFormat()),

          width, height,

          hasBorder ? 1 : 0, data);



You should rather use following:



ARBTextureCompression.glCompressedTexImage2DARB(

          getGLCubeMapFace(face),

          m,

          TextureStateRecord

          .getGLDataFormat(image

          .getFormat()),

            width, height,

            hasBorder ? 1 : 0,

            image.getData(face.ordinal()));



But is still doesn't solve the problem is images contains mipmaps. For this you have to rework from scratch entire loop here.



Hope that helps in fixing bug.



Thanks,

Konrad.

2

Actually I got cubemaps to work with DXT. But there are two bugs:

  1. You can't flip DXT images, so DXT compressed cubemaps loaded from DDS files will look wrong.
  2. Mipmaps don't work when used with cubemaps. If you enable Nearest/LinearMipmaps in the mini filter, the PositiveX (first image) is used for all faces in the cubemap.
3

Maybe you're right, but for me it makes no sense to use cubemap without mipmaps :slight_smile: That's why I wrote about this problem and possible solution for it.



Thanks,

Konrad