Mesa (master): i965/miptree: Stop multiplying cube depth by 6 in HiZ calculations

[Jason Ekstrand]

Module: Mesa
Branch: master
Commit: 5d76690f170de9acc541aa6b4a507ccd20a78158
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5d76690f170de9acc541aa6b4a507ccd20a78158

Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Wed Jul 20 08:24:15 2016 -0700

i965/miptree: Stop multiplying cube depth by 6 in HiZ calculations

intel_mipmap_tree::logical_depth0 is now in number of 2D slices so we no
longer need to be multiplying by 6.

Signed-off-by: Jason Ekstrand <jason at jlekstrand.net>
Reviewed-by: Anuj Phogat <anuj.phogat at gmail.com>
Cc: "12.0" <mesa-stable at lists.freedesktop.org>

---

 src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index c8e84b7..a988221 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -1794,14 +1794,8 @@ intel_gen7_hiz_buf_create(struct brw_context *brw,
       hz_height = DIV_ROUND_UP(hz_height, 2);
    } else {
       const unsigned hz_qpitch = h0 + h1 + (12 * vertical_align);
-      if (mt->target == GL_TEXTURE_CUBE_MAP_ARRAY ||
-          mt->target == GL_TEXTURE_CUBE_MAP) {
-         /* HZ_Height (rows) = Ceiling ( ( Q_pitch * Z_depth * 6/2) /8 ) * 8 */
-         hz_height = DIV_ROUND_UP(hz_qpitch * Z0 * 6, 2 * 8) * 8;
-      } else {
-         /* HZ_Height (rows) = Ceiling ( ( Q_pitch * Z_depth/2) /8 ) * 8 */
-         hz_height = DIV_ROUND_UP(hz_qpitch * Z0, 2 * 8) * 8;
-      }
+      /* HZ_Height (rows) = Ceiling ( ( Q_pitch * Z_depth/2) /8 ) * 8 */
+      hz_height = DIV_ROUND_UP(hz_qpitch * Z0, 2 * 8) * 8;
    }
 
    unsigned long pitch;
@@ -1898,15 +1892,6 @@ intel_gen8_hiz_buf_create(struct brw_context *brw,
    } else {
       /* HZ_Height (rows) = ceiling( (HZ_QPitch/2)/8) *8 * Z_Depth */
       hz_height = DIV_ROUND_UP(buf->qpitch, 2 * 8) * 8 * Z0;
-      if (mt->target == GL_TEXTURE_CUBE_MAP_ARRAY ||
-          mt->target == GL_TEXTURE_CUBE_MAP) {
-         /* HZ_Height (rows) = ceiling( (HZ_QPitch/2)/8) *8 * 6 * Z_Depth
-          *
-          * We can can just take our hz_height calculation from above, and
-          * multiply by 6 for the cube map and cube map array types.
-          */
-         hz_height *= 6;
-      }
    }
 
    unsigned long pitch;