src/gallium/drivers/softpipe/sp_tex_sample.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   4  * All Rights Reserved.
   5  * Copyright 2010 VMware, Inc.  All rights reserved.
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   8  * copy of this software and associated documentation files (the
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  12  * permit persons to whom the Software is furnished to do so, subject to
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  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
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  27  **************************************************************************/
  28
  29 #ifndef SP_TEX_SAMPLE_H
  30 #define SP_TEX_SAMPLE_H
  31
  32
  33 #include "tgsi/tgsi_exec.h"
  34
  35
  36 struct sp_sampler_view;
  37 struct sp_sampler;
  38
  39 typedef void (*wrap_nearest_func)(float s,
  40                                   unsigned size,
  41                                   int offset,
  42                                   int *icoord);
  43
  44 typedef void (*wrap_linear_func)(float s,
  45                                  unsigned size,
  46                                  int offset,
  47                                  int *icoord0,
  48                                  int *icoord1,
  49                                  float *w);
  50
  51 typedef float (*compute_lambda_func)(const struct sp_sampler_view *sp_sview,
  52                                      const float s[TGSI_QUAD_SIZE],
  53                                      const float t[TGSI_QUAD_SIZE],
  54                                      const float p[TGSI_QUAD_SIZE]);
  55
  56 struct img_filter_args {
  57    float s;
  58    float t;
  59    float p;
  60    unsigned level;
  61    unsigned face_id;
  62    const int8_t *offset;
  63 };
  64
  65 typedef void (*img_filter_func)(struct sp_sampler_view *sp_sview,
  66                                 struct sp_sampler *sp_samp,
  67                                 const struct img_filter_args *args,
  68                                 float *rgba);
  69
  70 struct filter_args {
  71    enum tgsi_sampler_control control;
  72    const int8_t *offset;
  73 };
  74
  75 typedef void (*mip_filter_func)(struct sp_sampler_view *sp_sview,
  76                                 struct sp_sampler *sp_samp,
  77                                 img_filter_func min_filter,
  78                                 img_filter_func mag_filter,
  79                                 const float s[TGSI_QUAD_SIZE],
  80                                 const float t[TGSI_QUAD_SIZE],
  81                                 const float p[TGSI_QUAD_SIZE],
  82                                 const float c0[TGSI_QUAD_SIZE],
  83                                 const float lod[TGSI_QUAD_SIZE],
  84                                 const struct filter_args *args,
  85                                 float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  86
  87
  88 typedef void (*filter_func)(struct sp_sampler_view *sp_sview,
  89                             struct sp_sampler *sp_samp,
  90                             const float s[TGSI_QUAD_SIZE],
  91                             const float t[TGSI_QUAD_SIZE],
  92                             const float p[TGSI_QUAD_SIZE],
  93                             const float c0[TGSI_QUAD_SIZE],
  94                             const float lod[TGSI_QUAD_SIZE],
  95                             const struct filter_args *args,
  96                             float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  97
  98
  99 typedef void (*fetch_func)(struct sp_sampler_view *sp_sview,
 100                            const int i[TGSI_QUAD_SIZE],
 101                            const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
 102                            const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
 103                            float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 104
 105
 106 struct sp_sampler_view
 107 {
 108    struct pipe_sampler_view base;
 109
 110    /* For sp_get_samples_2d_linear_POT:
 111     */
 112    unsigned xpot;
 113    unsigned ypot;
 114
 115    boolean need_swizzle;
 116    boolean pot2d;
 117
 118    filter_func get_samples;
 119
 120    /* this is just abusing the sampler_view object as local storage */
 121    unsigned faces[TGSI_QUAD_SIZE];
 122
 123    /* these are different per shader type */
 124    struct softpipe_tex_tile_cache *cache;
 125    compute_lambda_func compute_lambda;
 126
 127 };
 128
 129
 130 struct sp_sampler {
 131    struct pipe_sampler_state base;
 132
 133    boolean min_mag_equal_repeat_linear;
 134    boolean min_mag_equal;
 135    unsigned min_img_filter;
 136
 137    wrap_nearest_func nearest_texcoord_s;
 138    wrap_nearest_func nearest_texcoord_t;
 139    wrap_nearest_func nearest_texcoord_p;
 140
 141    wrap_linear_func linear_texcoord_s;
 142    wrap_linear_func linear_texcoord_t;
 143    wrap_linear_func linear_texcoord_p;
 144
 145    mip_filter_func mip_filter;
 146 };
 147
 148
 149 /**
 150  * Subclass of tgsi_sampler
 151  */
 152 struct sp_tgsi_sampler
 153 {
 154    struct tgsi_sampler base;  /**< base class */
 155    struct sp_sampler *sp_sampler[PIPE_MAX_SAMPLERS];
 156    struct sp_sampler_view sp_sview[PIPE_MAX_SHADER_SAMPLER_VIEWS];
 157
 158 };
 159
 160 compute_lambda_func
 161 softpipe_get_lambda_func(const struct pipe_sampler_view *view, unsigned shader);
 162
 163
 164 void *
 165 softpipe_create_sampler_state(struct pipe_context *pipe,
 166                               const struct pipe_sampler_state *sampler);
 167
 168
 169 struct pipe_sampler_view *
 170 softpipe_create_sampler_view(struct pipe_context *pipe,
 171                              struct pipe_resource *resource,
 172                              const struct pipe_sampler_view *templ);
 173
 174
 175 struct sp_tgsi_sampler *
 176 sp_create_tgsi_sampler(void);
 177
 178
 179 #endif /* SP_TEX_SAMPLE_H */