src/gallium/drivers/lima/lima_texture.h

   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
  33 typedef 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
  93 void 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 void lima_update_textures(struct lima_context *ctx);
  97
  98
  99 static inline int16_t lima_float_to_fixed8(float f)
 100 {
 101    return (int)(f * 16.0);
 102 }
 103
 104 static inline float lima_fixed8_to_float(int16_t i)
 105 {
 106    float sign = 1.0;
 107
 108    if (i > 0xff) {
 109       i = 0x200 - i;
 110       sign = -1;
 111    }
 112
 113    return sign * (float)(i / 16.0);
 114 }
 115
 116 #endif