[Mesa-dev] [PATCH 1/9] i965: Rename intel_mipmap_tree::r8stencil_* -> ::shadow_*

[Nanley Chery]

Use more generic field names. We'll reuse these fields for a workaround
with ASTC miptrees.
---
 src/mesa/drivers/dri/i965/brw_wm_surface_state.c |  8 ++++----
 src/mesa/drivers/dri/i965/intel_mipmap_tree.c    | 16 ++++++++--------
 src/mesa/drivers/dri/i965/intel_mipmap_tree.h    | 14 +++++++-------
 3 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 8d21cf5fa70..e214fae140b 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -563,15 +563,15 @@ static void brw_update_texture_surface(struct gl_context *ctx,
 
       if (obj->StencilSampling && firstImage->_BaseFormat == GL_DEPTH_STENCIL) {
          if (devinfo->gen <= 7) {
-            assert(mt->r8stencil_mt && !mt->stencil_mt->r8stencil_needs_update);
-            mt = mt->r8stencil_mt;
+            assert(mt->shadow_mt && !mt->stencil_mt->shadow_needs_update);
+            mt = mt->shadow_mt;
          } else {
             mt = mt->stencil_mt;
          }
          format = ISL_FORMAT_R8_UINT;
       } else if (devinfo->gen <= 7 && mt->format == MESA_FORMAT_S_UINT8) {
-         assert(mt->r8stencil_mt && !mt->r8stencil_needs_update);
-         mt = mt->r8stencil_mt;
+         assert(mt->shadow_mt && !mt->shadow_needs_update);
+         mt = mt->shadow_mt;
          format = ISL_FORMAT_R8_UINT;
       }
 
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index e32641f4098..332c5d88f58 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -1214,7 +1214,7 @@ intel_miptree_release(struct intel_mipmap_tree **mt)
 
       brw_bo_unreference((*mt)->bo);
       intel_miptree_release(&(*mt)->stencil_mt);
-      intel_miptree_release(&(*mt)->r8stencil_mt);
+      intel_miptree_release(&(*mt)->shadow_mt);
       intel_miptree_aux_buffer_free((*mt)->aux_buf);
       free_aux_state_map((*mt)->aux_state);
 
@@ -2427,7 +2427,7 @@ intel_miptree_finish_write(struct brw_context *brw,
    switch (mt->aux_usage) {
    case ISL_AUX_USAGE_NONE:
       if (mt->format == MESA_FORMAT_S_UINT8 && devinfo->gen <= 7)
-         mt->r8stencil_needs_update = true;
+         mt->shadow_needs_update = true;
       break;
 
    case ISL_AUX_USAGE_MCS:
@@ -2933,9 +2933,9 @@ intel_update_r8stencil(struct brw_context *brw,
 
    assert(src->surf.size_B > 0);
 
-   if (!mt->r8stencil_mt) {
+   if (!mt->shadow_mt) {
       assert(devinfo->gen > 6); /* Handle MIPTREE_LAYOUT_GEN6_HIZ_STENCIL */
-      mt->r8stencil_mt = make_surface(
+      mt->shadow_mt = make_surface(
                             brw,
                             src->target,
                             MESA_FORMAT_R_UINT8,
@@ -2949,13 +2949,13 @@ intel_update_r8stencil(struct brw_context *brw,
                             ISL_TILING_Y0_BIT,
                             ISL_SURF_USAGE_TEXTURE_BIT,
                             BO_ALLOC_BUSY, 0, NULL);
-      assert(mt->r8stencil_mt);
+      assert(mt->shadow_mt);
    }
 
-   if (src->r8stencil_needs_update == false)
+   if (src->shadow_needs_update == false)
       return;
 
-   struct intel_mipmap_tree *dst = mt->r8stencil_mt;
+   struct intel_mipmap_tree *dst = mt->shadow_mt;
 
    for (int level = src->first_level; level <= src->last_level; level++) {
       const unsigned depth = src->surf.dim == ISL_SURF_DIM_3D ?
@@ -2975,7 +2975,7 @@ intel_update_r8stencil(struct brw_context *brw,
    }
 
    brw_cache_flush_for_read(brw, dst->bo);
-   src->r8stencil_needs_update = false;
+   src->shadow_needs_update = false;
 }
 
 static void *
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
index 708757c47b8..d75c93b8b42 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
@@ -294,16 +294,16 @@ struct intel_mipmap_tree
    struct intel_mipmap_tree *stencil_mt;
 
    /**
-    * \brief Stencil texturing miptree for sampling from a stencil texture
+    * \brief Shadow miptree for sampling when the main isn't supported by HW.
     *
-    * Some hardware doesn't support sampling from the stencil texture as
-    * required by the GL_ARB_stencil_texturing extenion. To workaround this we
-    * blit the texture into a new texture that can be sampled.
+    * To workaround various sampler bugs and limitations, we blit the main
+    * texture into a new texture that can be sampled.
     *
-    * \see intel_update_r8stencil()
+    * This miptree may be used for:
+    * - Stencil texturing (pre-BDW) as required by GL_ARB_stencil_texturing.
     */
-   struct intel_mipmap_tree *r8stencil_mt;
-   bool r8stencil_needs_update;
+   struct intel_mipmap_tree *shadow_mt;
+   bool shadow_needs_update;
 
    /**
     * \brief CCS, MCS, or HiZ auxiliary buffer.
-- 
2.19.0