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11 * The above copyright notice and this permission notice (including the next
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25 #include "isl_gen12.h"
29 isl_gen12_choose_image_alignment_el(const struct isl_device
*dev
,
30 const struct isl_surf_init_info
*restrict info
,
31 enum isl_tiling tiling
,
32 enum isl_dim_layout dim_layout
,
33 enum isl_msaa_layout msaa_layout
,
34 struct isl_extent3d
*image_align_el
)
36 /* Handled by isl_choose_image_alignment_el */
37 assert(info
->format
!= ISL_FORMAT_HIZ
);
39 const struct isl_format_layout
*fmtl
= isl_format_get_layout(info
->format
);
40 if (fmtl
->txc
== ISL_TXC_CCS
) {
41 /* This CCS compresses a 2D-view of the entire surface. */
42 assert(info
->levels
== 1 && info
->array_len
== 1 && info
->depth
== 1);
43 *image_align_el
= isl_extent3d(1, 1, 1);
47 if (isl_surf_usage_is_depth(info
->usage
)) {
48 /* The alignment parameters for depth buffers are summarized in the
51 * Surface Format | MSAA | Align Width | Align Height
52 * -----------------+-------------+-------------+--------------
53 * D16_UNORM | 1x, 4x, 16x | 8 | 8
54 * ----------------+-------------+-------------+--------------
55 * D16_UNORM | 2x, 8x | 16 | 4
56 * ----------------+-------------+-------------+--------------
58 * -----------------+-------------+-------------+--------------
60 assert(isl_is_pow2(info
->samples
));
62 info
->format
!= ISL_FORMAT_R16_UNORM
?
63 isl_extent3d(8, 4, 1) :
64 (info
->samples
== 2 || info
->samples
== 8 ?
65 isl_extent3d(16, 4, 1) : isl_extent3d(8, 8, 1));
66 } else if (isl_surf_usage_is_stencil(info
->usage
)) {
67 *image_align_el
= isl_extent3d(16, 8, 1);
69 isl_gen9_choose_image_alignment_el(dev
, info
, tiling
, dim_layout
,
70 msaa_layout
, image_align_el
);