1/*
2 * Copyright (c) 2018-2019 Lima Project
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 */
24
25#ifndef H_LIMA_TEXTURE
26#define H_LIMA_TEXTURE
27
28#define lima_min_tex_desc_size 64
29
30#define LIMA_TEXTURE_TYPE_2D   2
31#define LIMA_TEXTURE_TYPE_CUBE 5
32
33typedef struct __attribute__((__packed__)) {
34   /* Word 0 */
35   uint32_t format : 6;
36   uint32_t flag1: 1;
37   uint32_t swap_r_b: 1;
38   uint32_t unknown_0_1: 8;
39   uint32_t stride: 15;
40   uint32_t unknown_0_2: 1;
41
42   /* Word 1-3 */
43   uint32_t unknown_1_1: 7;
44   uint32_t unnorm_coords: 1;
45   uint32_t unknown_1_2: 1;
46   uint32_t texture_type: 3;
47   uint32_t min_lod: 8; /* Fixed point, 4.4, unsigned */
48   uint32_t max_lod: 8; /* Fixed point, 4.4, unsigned */
49   uint32_t lod_bias: 9; /* Fixed point, signed, 1.4.4 */
50   uint32_t unknown_2_1: 3;
51   uint32_t has_stride: 1;
52   uint32_t min_mipfilter_2: 2; /* 0x3 for linear, 0x0 for nearest */
53   uint32_t min_img_filter_nearest: 1;
54   uint32_t mag_img_filter_nearest: 1;
55   uint32_t wrap_s_clamp_to_edge: 1;
56   uint32_t wrap_s_clamp: 1;
57   uint32_t wrap_s_mirror_repeat: 1;
58   uint32_t wrap_t_clamp_to_edge: 1;
59   uint32_t wrap_t_clamp: 1;
60   uint32_t wrap_t_mirror_repeat: 1;
61   uint32_t unknown_2_2: 3;
62   uint32_t width: 13;
63   uint32_t height: 13;
64   uint32_t unknown_3_1: 1;
65   uint32_t unknown_3_2: 15;
66
67   /* Word 4 */
68   uint32_t unknown_4;
69
70   /* Word 5 */
71   uint32_t unknown_5;
72
73   /* Word 6-15 */
74   /* layout is in va[0] bit 13-14 */
75   /* VAs start in va[0] at bit 30, each VA is 26 bits (only MSBs are stored), stored
76    * linearly in memory */
77   union {
78      uint32_t va[0];
79      struct __attribute__((__packed__)) {
80         uint32_t unknown_6_1: 13;
81         uint32_t layout: 2;
82         uint32_t unknown_6_2: 9;
83         uint32_t unknown_6_3: 6;
84#define VA_BIT_OFFSET 30
85#define VA_BIT_SIZE 26
86         uint32_t va_0: VA_BIT_SIZE;
87         uint32_t va_0_1: 8;
88         uint32_t va_1_x[0];
89      } va_s;
90   };
91} lima_tex_desc;
92
93void lima_texture_desc_set_res(struct lima_context *ctx, lima_tex_desc *desc,
94                               struct pipe_resource *prsc,
95                               unsigned first_level, unsigned last_level,
96                               unsigned first_layer);
97void lima_update_textures(struct lima_context *ctx);
98
99
100static inline int16_t lima_float_to_fixed8(float f)
101{
102   return (int)(f * 16.0);
103}
104
105static inline float lima_fixed8_to_float(int16_t i)
106{
107   float sign = 1.0;
108
109   if (i > 0xff) {
110      i = 0x200 - i;
111      sign = -1;
112   }
113
114   return sign * (float)(i / 16.0);
115}
116
117#endif
118