1/*
2 * Copyright (C) 2016 Rob Clark <robclark@freedesktop.org>
3 * Copyright © 2018 Google, Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 * Authors:
25 *    Rob Clark <robclark@freedesktop.org>
26 */
27
28#include "pipe/p_defines.h"
29#include "util/format/u_format.h"
30
31#include "fd6_format.h"
32#include "freedreno_resource.h"
33
34enum a6xx_tex_swiz
35fd6_pipe2swiz(unsigned swiz)
36{
37   switch (swiz) {
38   default:
39   case PIPE_SWIZZLE_X:
40      return A6XX_TEX_X;
41   case PIPE_SWIZZLE_Y:
42      return A6XX_TEX_Y;
43   case PIPE_SWIZZLE_Z:
44      return A6XX_TEX_Z;
45   case PIPE_SWIZZLE_W:
46      return A6XX_TEX_W;
47   case PIPE_SWIZZLE_0:
48      return A6XX_TEX_ZERO;
49   case PIPE_SWIZZLE_1:
50      return A6XX_TEX_ONE;
51   }
52}
53
54void
55fd6_tex_swiz(enum pipe_format format, enum a6xx_tile_mode tile_mode, unsigned char *swiz, unsigned swizzle_r,
56             unsigned swizzle_g, unsigned swizzle_b, unsigned swizzle_a)
57{
58   const struct util_format_description *desc = util_format_description(format);
59   const unsigned char uswiz[4] = {swizzle_r, swizzle_g, swizzle_b, swizzle_a};
60
61   /* Gallium expects stencil sampler to return (s,s,s,s), so massage
62    * the swizzle to do so.
63    */
64   if (format == PIPE_FORMAT_X24S8_UINT) {
65      const unsigned char stencil_swiz[4] = {PIPE_SWIZZLE_W, PIPE_SWIZZLE_W,
66                                             PIPE_SWIZZLE_W, PIPE_SWIZZLE_W};
67      util_format_compose_swizzles(stencil_swiz, uswiz, swiz);
68   } else if (format == PIPE_FORMAT_R8G8_R8B8_UNORM || format == PIPE_FORMAT_G8R8_B8R8_UNORM) {
69      unsigned char fswiz[4] = {PIPE_SWIZZLE_Z, PIPE_SWIZZLE_X, PIPE_SWIZZLE_Y, PIPE_SWIZZLE_1};
70      util_format_compose_swizzles(fswiz, uswiz, swiz);
71   } else if (fd6_texture_swap(format, TILE6_LINEAR) != WZYX || format == PIPE_FORMAT_A1R5G5B5_UNORM) {
72      /* Formats with a non-pass-through swap are permutations of RGBA
73       * formats. We program the permutation using the swap and don't
74       * need to compose the format swizzle with the user swizzle.
75       */
76      memcpy(swiz, uswiz, sizeof(uswiz));
77   } else {
78      /* Otherwise, it's an unswapped RGBA format or a format like L8 where
79       * we need the XXX1 swizzle from the gallium format description.
80       */
81      util_format_compose_swizzles(desc->swizzle, uswiz, swiz);
82   }
83}
84
85/* Compute the TEX_CONST_0 value for texture state, including SWIZ/SWAP/etc: */
86uint32_t
87fd6_tex_const_0(struct pipe_resource *prsc, unsigned level,
88                enum pipe_format format, unsigned swizzle_r, unsigned swizzle_g,
89                unsigned swizzle_b, unsigned swizzle_a)
90{
91   struct fd_resource *rsc = fd_resource(prsc);
92   unsigned char swiz[4];
93
94   fd6_tex_swiz(format, rsc->layout.tile_mode, swiz, swizzle_r, swizzle_g, swizzle_b, swizzle_a);
95
96   return A6XX_TEX_CONST_0_FMT(fd6_texture_format(format, rsc->layout.tile_mode)) |
97          A6XX_TEX_CONST_0_SAMPLES(fd_msaa_samples(prsc->nr_samples)) |
98          A6XX_TEX_CONST_0_SWAP(fd6_texture_swap(format, rsc->layout.tile_mode)) |
99          A6XX_TEX_CONST_0_TILE_MODE(fd_resource_tile_mode(prsc, level)) |
100          COND(util_format_is_srgb(format), A6XX_TEX_CONST_0_SRGB) |
101          A6XX_TEX_CONST_0_SWIZ_X(fd6_pipe2swiz(swiz[0])) |
102          A6XX_TEX_CONST_0_SWIZ_Y(fd6_pipe2swiz(swiz[1])) |
103          A6XX_TEX_CONST_0_SWIZ_Z(fd6_pipe2swiz(swiz[2])) |
104          A6XX_TEX_CONST_0_SWIZ_W(fd6_pipe2swiz(swiz[3]));
105}
106