src/gallium/drivers/softpipe/sp_tex_sample.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  * Copyright 2010 VMware, Inc.  All rights reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 #ifndef SP_TEX_SAMPLE_H
  30 #define SP_TEX_SAMPLE_H
  31
  32
  33 #include "tgsi/tgsi_exec.h"
  34
  35 struct sp_sampler_variant;
  36
  37 typedef void (*wrap_nearest_func)(float s,
  38                                   unsigned size,
  39                                   int *icoord);
  40
  41 typedef void (*wrap_linear_func)(float s,
  42                                  unsigned size,
  43                                  int *icoord0,
  44                                  int *icoord1,
  45                                  float *w);
  46
  47 typedef float (*compute_lambda_func)(const struct sp_sampler_variant *samp,
  48                                      const float s[TGSI_QUAD_SIZE],
  49                                      const float t[TGSI_QUAD_SIZE],
  50                                      const float p[TGSI_QUAD_SIZE]);
  51
  52 typedef void (*img_filter_func)(struct sp_sampler_variant *samp,
  53                                 float s,
  54                                 float t,
  55                                 float p,
  56                                 unsigned level,
  57                                 unsigned face_id,
  58                                 float *rgba);
  59
  60 typedef void (*filter_func)(struct sp_sampler_variant *sp_samp,
  61                             const float s[TGSI_QUAD_SIZE],
  62                             const float t[TGSI_QUAD_SIZE],
  63                             const float p[TGSI_QUAD_SIZE],
  64                             const float c0[TGSI_QUAD_SIZE],
  65                             const float lod[TGSI_QUAD_SIZE],
  66                             enum tgsi_sampler_control control,
  67                             float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  68
  69
  70 typedef void (*get_dim_func)(struct sp_sampler_variant *sp_samp,
  71                              int level, int dims[4]);
  72
  73 typedef void (*fetch_func)(struct sp_sampler_variant *sp_samp,
  74                            const int i[TGSI_QUAD_SIZE],
  75                            const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
  76                            const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
  77                            float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  78
  79
  80 union sp_sampler_key {
  81    struct {
  82       unsigned target:5;
  83       unsigned is_pot:1;
  84       unsigned processor:2;
  85       unsigned unit:4;
  86       unsigned swizzle_r:3;
  87       unsigned swizzle_g:3;
  88       unsigned swizzle_b:3;
  89       unsigned swizzle_a:3;
  90       unsigned pad:8;
  91    } bits;
  92    unsigned value;
  93 };
  94
  95
  96 struct sp_sampler_variant
  97 {
  98    union sp_sampler_key key;
  99
 100    /* The owner of this struct:
 101     */
 102    const struct pipe_sampler_state *sampler;
 103
 104
 105    /* Currently bound texture:
 106     */
 107    const struct pipe_sampler_view *view;
 108    struct softpipe_tex_tile_cache *cache;
 109
 110    /* For sp_get_samples_2d_linear_POT:
 111     */
 112    unsigned xpot;
 113    unsigned ypot;
 114
 115    unsigned faces[TGSI_QUAD_SIZE];
 116
 117    wrap_nearest_func nearest_texcoord_s;
 118    wrap_nearest_func nearest_texcoord_t;
 119    wrap_nearest_func nearest_texcoord_p;
 120
 121    wrap_linear_func linear_texcoord_s;
 122    wrap_linear_func linear_texcoord_t;
 123    wrap_linear_func linear_texcoord_p;
 124
 125    img_filter_func min_img_filter;
 126    img_filter_func mag_img_filter;
 127
 128    compute_lambda_func compute_lambda;
 129
 130    filter_func mip_filter;
 131    filter_func compare;
 132    filter_func sample_target;
 133
 134    filter_func get_samples;
 135    fetch_func get_texel;
 136    get_dim_func get_dims;
 137
 138
 139    /* Linked list:
 140     */
 141    struct sp_sampler_variant *next;
 142 };
 143
 144
 145 /**
 146  * Subclass of tgsi_sampler
 147  */
 148 struct sp_tgsi_sampler
 149 {
 150    struct tgsi_sampler base;  /**< base class */
 151    struct sp_sampler_variant *sp_sampler[PIPE_MAX_SAMPLERS];
 152
 153 };
 154
 155
 156 struct sp_sampler;
 157
 158 /* Create a sampler variant for a given set of non-orthogonal state.  Currently the
 159  */
 160 struct sp_sampler_variant *
 161 sp_create_sampler_variant( const struct pipe_sampler_state *sampler,
 162                            const union sp_sampler_key key );
 163
 164 void sp_sampler_variant_bind_view( struct sp_sampler_variant *variant,
 165                                    struct softpipe_tex_tile_cache *tex_cache,
 166                                    const struct pipe_sampler_view *view );
 167
 168 void sp_sampler_variant_destroy( struct sp_sampler_variant * );
 169
 170
 171
 172 static INLINE struct sp_sampler_variant *
 173 sp_sampler_variant(const struct tgsi_sampler *sampler)
 174 {
 175    return (struct sp_sampler_variant *) sampler;
 176 }
 177
 178 extern void
 179 sp_get_samples(struct tgsi_sampler *tgsi_sampler,
 180                const float s[TGSI_QUAD_SIZE],
 181                const float t[TGSI_QUAD_SIZE],
 182                const float p[TGSI_QUAD_SIZE],
 183                float lodbias,
 184                float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 185
 186
 187 struct sp_tgsi_sampler *
 188 sp_create_tgsi_sampler(void);
 189
 190
 191 #endif /* SP_TEX_SAMPLE_H */