[Mesa-dev] [PATCH 14/17] i965: Support non_mip_arrays for multiple miplevels

[Jordan Justen]

Previously array spacing lod0 was only used with a single mip level.
It indicated that no mip level spacing should be used between array
slices.

gen6 separate stencil & hiz only support LOD0, so we need to allocate
the miptree similar to array spacing lod0, except we also need
multiple mip levels.

So, the miptree is allocated with tightly packed array slice spacing,
but we still also pack the miplevels into the region similar to a
normal multi mip level packing.

Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
---
 src/mesa/drivers/dri/i965/brw_tex_layout.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_tex_layout.c b/src/mesa/drivers/dri/i965/brw_tex_layout.c
index 9e2720b..9d248cb 100644
--- a/src/mesa/drivers/dri/i965/brw_tex_layout.c
+++ b/src/mesa/drivers/dri/i965/brw_tex_layout.c
@@ -203,6 +203,11 @@ brw_miptree_layout_2d(struct intel_mipmap_tree *mt)
       if (mt->compressed)
 	 img_height /= mt->align_h;
 
+      if (mt->non_mip_arrays) {
+         /* Compact arrays with separated miplevels */
+	 img_height *= depth;
+      }
+
       /* Because the images are packed better, the final offset
        * might not be the maximal one:
        */
@@ -238,6 +243,7 @@ brw_miptree_layout_texture_array(struct brw_context *brw,
 				 struct intel_mipmap_tree *mt)
 {
    int h0, h1;
+   unsigned height = mt->physical_height0;
 
    h0 = ALIGN(mt->physical_height0, mt->align_h);
    h1 = ALIGN(minify(mt->physical_height0, 1), mt->align_h);
@@ -251,11 +257,22 @@ brw_miptree_layout_texture_array(struct brw_context *brw,
    brw_miptree_layout_2d(mt);
 
    for (unsigned level = mt->first_level; level <= mt->last_level; level++) {
+      unsigned img_height;
+      img_height = ALIGN(height, mt->align_h);
+      if (mt->compressed)
+         img_height /= mt->align_h;
+
       for (int q = 0; q < mt->physical_depth0; q++) {
-	 intel_miptree_set_image_offset(mt, level, q, 0, q * physical_qpitch);
+         if (mt->non_mip_arrays) {
+            intel_miptree_set_image_offset(mt, level, q, 0, q * img_height);
+         } else {
+            intel_miptree_set_image_offset(mt, level, q, 0, q * physical_qpitch);
+         }
       }
+      height = minify(height, 1);
    }
-   mt->total_height = physical_qpitch * mt->physical_depth0;
+   if (!mt->non_mip_arrays)
+      mt->total_height = physical_qpitch * mt->physical_depth0;
 
    align_cube(mt);
 }
-- 
2.0.1