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_SAMPLER_DIM_1D   0
31#define LIMA_SAMPLER_DIM_2D   1
32#define LIMA_SAMPLER_DIM_3D   2
33
34#define LIMA_TEX_WRAP_REPEAT                 0
35#define LIMA_TEX_WRAP_CLAMP_TO_EDGE          1
36#define LIMA_TEX_WRAP_CLAMP                  2
37#define LIMA_TEX_WRAP_CLAMP_TO_BORDER        3
38#define LIMA_TEX_WRAP_MIRROR_REPEAT          4
39#define LIMA_TEX_WRAP_MIRROR_CLAMP_TO_EDGE   5
40#define LIMA_TEX_WRAP_MIRROR_CLAMP           6
41#define LIMA_TEX_WRAP_MIRROR_CLAMP_TO_BORDER 7
42
43typedef struct __attribute__((__packed__)) {
44   /* Word 0 */
45   uint32_t format : 6;
46   uint32_t flag1: 1;
47   uint32_t swap_r_b: 1;
48   uint32_t unknown_0_1: 8;
49   uint32_t stride: 15;
50   uint32_t unknown_0_2: 1;
51
52   /* Word 1-3 */
53   uint32_t unknown_1_1: 7;
54   uint32_t unnorm_coords: 1;
55   uint32_t unknown_1_2: 1;
56   uint32_t cube_map: 1;
57   uint32_t sampler_dim: 2;
58   uint32_t min_lod: 8; /* Fixed point, 4.4, unsigned */
59   uint32_t max_lod: 8; /* Fixed point, 4.4, unsigned */
60   uint32_t lod_bias: 9; /* Fixed point, signed, 1.4.4 */
61   uint32_t unknown_2_1: 3;
62   uint32_t has_stride: 1;
63   uint32_t min_mipfilter_2: 2; /* 0x3 for linear, 0x0 for nearest */
64   uint32_t min_img_filter_nearest: 1;
65   uint32_t mag_img_filter_nearest: 1;
66   uint32_t wrap_s: 3;
67   uint32_t wrap_t: 3;
68   uint32_t wrap_r: 3;
69   uint32_t width: 13;
70   uint32_t height: 13;
71   uint32_t depth: 13;
72
73   uint32_t border_red: 16;
74   uint32_t border_green: 16;
75   uint32_t border_blue: 16;
76   uint32_t border_alpha: 16;
77
78   /* Word 5 (last 3 bits) */
79   uint32_t unknown_5_1: 3;
80
81   /* Word 6-15 */
82   /* layout is in va[0] bit 13-14 */
83   /* VAs start in va[0] at bit 30, each VA is 26 bits (only MSBs are stored), stored
84    * linearly in memory */
85   union {
86      uint32_t va[0];
87      struct __attribute__((__packed__)) {
88         uint32_t unknown_6_1: 13;
89         uint32_t layout: 2;
90         uint32_t unknown_6_2: 9;
91         uint32_t unknown_6_3: 6;
92#define VA_BIT_OFFSET 30
93#define VA_BIT_SIZE 26
94         uint32_t va_0: VA_BIT_SIZE;
95         uint32_t va_0_1: 8;
96         uint32_t va_1_x[0];
97      } va_s;
98   };
99} lima_tex_desc;
100
101void lima_texture_desc_set_res(struct lima_context *ctx, lima_tex_desc *desc,
102                               struct pipe_resource *prsc,
103                               unsigned first_level, unsigned last_level,
104                               unsigned first_layer, unsigned mrt_idx);
105void lima_update_textures(struct lima_context *ctx);
106
107
108static inline int16_t lima_float_to_fixed8(float f)
109{
110   return (int)(f * 16.0);
111}
112
113static inline float lima_fixed8_to_float(int16_t i)
114{
115   float sign = 1.0;
116
117   if (i > 0xff) {
118      i = 0x200 - i;
119      sign = -1;
120   }
121
122   return sign * (float)(i / 16.0);
123}
124
125#endif
126