When rendering to a texture with BaseLevel set, the miptree may be laid
out such that BaseLevel is in level 0 of the miptree (to avoid wasting
memory on unused levels between 0 and BaseLevel-1). In that case, we
have to shift our render target's level down to the appropriate level of
the smaller miptree.
The WebGL test in combination with a meta code relating to
glGenerateMipmap also triggered a similar failure scenario.
This GPU hang regression was introduced by
c754f7a8.
Bugzilla: http://bugs.freedesktop.org/show_bug.cgi?id=65324
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
assert(brw->has_surface_tile_offset);
- surf[5] = irb->mt_level;
+ surf[5] = irb->mt_level - irb->mt->first_level;
surf[2] = SET_FIELD(irb->mt->logical_width0 - 1, GEN7_SURFACE_WIDTH) |
SET_FIELD(irb->mt->logical_height0 - 1, GEN7_SURFACE_HEIGHT);