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-/*
- * Copyright © 2011 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#pragma once
-
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * For an overview of the HiZ operations, see the following sections of the
- * Sandy Bridge PRM, Volume 1, Part2:
- * - 7.5.3.1 Depth Buffer Clear
- * - 7.5.3.2 Depth Buffer Resolve
- * - 7.5.3.3 Hierarchical Depth Buffer Resolve
- *
- * Of these, two get entered in the resolve map as needing to be done to the
- * buffer: depth resolve and hiz resolve.
- */
-enum gen6_hiz_op {
- GEN6_HIZ_OP_DEPTH_CLEAR,
- GEN6_HIZ_OP_DEPTH_RESOLVE,
- GEN6_HIZ_OP_HIZ_RESOLVE,
- GEN6_HIZ_OP_NONE,
-};
-
-/**
- * \brief Map of miptree slices to needed resolves.
- *
- * The map is implemented as a linear doubly-linked list.
- *
- * In the intel_resolve_map*() functions, the \c head argument is not
- * inspected for its data. It only serves as an anchor for the list.
- *
- * \par Design Discussion
- *
- * There are two possible ways to record which miptree slices need
- * resolves. 1) Maintain a flag for every miptree slice in the texture,
- * likely in intel_mipmap_level::slice, or 2) maintain a list of only
- * those slices that need a resolve.
- *
- * Immediately before drawing, a full depth resolve performed on each
- * enabled depth texture. If design 1 were chosen, then at each draw call
- * it would be necessary to iterate over each miptree slice of each
- * enabled depth texture in order to query if each slice needed a resolve.
- * In the worst case, this would require 2^16 iterations: 16 texture
- * units, 16 miplevels, and 256 depth layers (assuming maximums for OpenGL
- * 2.1).
- *
- * By choosing design 2, the number of iterations is exactly the minimum
- * necessary.
- */
-struct intel_resolve_map {
- uint32_t level;
- uint32_t layer;
- enum gen6_hiz_op need;
-
- struct intel_resolve_map *next;
- struct intel_resolve_map *prev;
-};
-
-void
-intel_resolve_map_set(struct intel_resolve_map *head,
- uint32_t level,
- uint32_t layer,
- enum gen6_hiz_op need);
-
-struct intel_resolve_map*
-intel_resolve_map_get(struct intel_resolve_map *head,
- uint32_t level,
- uint32_t layer);
-
-void
-intel_resolve_map_remove(struct intel_resolve_map *elem);
-
-void
-intel_resolve_map_clear(struct intel_resolve_map *head);
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-