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      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                                unsigned first_layer);
     97 void lima_update_textures(struct lima_context *ctx);
     98 
     99 
    100 static inline int16_t lima_float_to_fixed8(float f)
    101 {
    102    return (int)(f * 16.0);
    103 }
    104 
    105 static 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