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/*
* Copyright (c) 2018 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.
*/
#include "isl_gen9.h"
#include "isl_gen12.h"
#include "isl_priv.h"
void
isl_gen12_choose_image_alignment_el(const struct isl_device *dev,
const struct isl_surf_init_info *restrict info,
enum isl_tiling tiling,
enum isl_dim_layout dim_layout,
enum isl_msaa_layout msaa_layout,
struct isl_extent3d *image_align_el)
{
/* Handled by isl_choose_image_alignment_el */
assert(info->format != ISL_FORMAT_HIZ);
const struct isl_format_layout *fmtl = isl_format_get_layout(info->format);
if (fmtl->txc == ISL_TXC_CCS) {
/* This CCS compresses a 2D-view of the entire surface. */
assert(info->levels == 1 && info->array_len == 1 && info->depth == 1);
*image_align_el = isl_extent3d(1, 1, 1);
return;
}
if (isl_surf_usage_is_depth(info->usage)) {
/* The alignment parameters for depth buffers are summarized in the
* following table:
*
* Surface Format | MSAA | Align Width | Align Height
* -----------------+-------------+-------------+--------------
* D16_UNORM | 1x, 4x, 16x | 8 | 8
* ----------------+-------------+-------------+--------------
* D16_UNORM | 2x, 8x | 16 | 4
* ----------------+-------------+-------------+--------------
* other | any | 8 | 4
* -----------------+-------------+-------------+--------------
*/
assert(isl_is_pow2(info->samples));
*image_align_el =
info->format != ISL_FORMAT_R16_UNORM ?
isl_extent3d(8, 4, 1) :
(info->samples == 2 || info->samples == 8 ?
isl_extent3d(16, 4, 1) : isl_extent3d(8, 8, 1));
} else if (isl_surf_usage_is_stencil(info->usage)) {
*image_align_el = isl_extent3d(16, 8, 1);
} else {
isl_gen9_choose_image_alignment_el(dev, info, tiling, dim_layout,
msaa_layout, image_align_el);
}
}
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