03-12-2002, 02:18 AM
I want to subload texture with glCompressedTexImage2DARB, but I have a alignement problem. I m looking for help or a sample of using.
03-12-2002, 02:30 AM
If your using one of the S3TC variants then
texsubimage2d and copytexsubimage2d should work as long as you are working along 4x4 texel boundaries.
your width , height and offset should all be multiples of 4 (unless your offset is zero in which case the texture width/height are valid values)
03-12-2002, 03:11 AM
These functions work I think, but...
I try to subload a compressed texture, but glCompressedTexSubImage2DARB
This is a sample of my code :
/*load compressed image*/
glCompressedTexImage2DARB(GL_TEXTURE_2D, 0,dxtcimg->format,dxtcimg->width,dxtcimg->height,0,dxtcimg->size, dxtcimg->pixels);
/*these functions have no effect on the alignment of the subloaded texture, WHY ?*/
/*subload parts of the original compressed image.*/
GL_TEXTURE_2D,0, 256, 256, 128, 128,
dxtcimg->format, 128*128/2, dxtcimg->pixels);
I think i have a problem with the alignement of my data, how can i specify alignement of compressed data (glPixelStorei) ?
07-03-2002, 06:39 AM
Do you still have the problem?
What kind of gfx card do you have, what drivers, operatingsystem?
I have the same problem but just with a GeForce 2 MX. With a GeForce 2 GTS the same code works fine.
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