[Piglit] [PATCH piglit v2] texsubimage: Test GL_ARB_texture_cube_map_array

[Neil Roberts]

Anuj Phogat <anuj.phogat at gmail.com> writes:

> Looking at the output image I assumed 6 rectangles drawn in a row show
> 6 faces of the cubemap and 8 rows represent 8 layers. But draw coordinates
> don't follow this pattern. It's not incorrect but confusing. I think what you
> need here is:
> piglit_draw_rect_tex3d(i % 6 * w, i / 6 * h, /* x/y */

This is a bit awkward to change. I originally made it so that it would
draw the 6 faces vertically like that because the function is also used
to draw the 3D texture slices and I didn't want to mess with the
appearance of that. If I make the change as you suggest then the 3D case
will render six layers in one row with two layers in the second row
which I think is weirder than having the cube faces not take up a single
row. I would also have to increase the window size to 768 because the
width of the 3D slices are 128. I was hoping to make the minimal changes
and didn't think that lining up the cube faces would matter all that
much.

Regards,
- Neil