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.
   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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  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
  36 struct sp_sampler_view;
  37 struct sp_sampler;
  38
  39 typedef void (*wrap_nearest_func)(float s,
  40                                   unsigned size,
  41                                   int *icoord);
  42
  43 typedef void (*wrap_linear_func)(float s,
  44                                  unsigned size,
  45                                  int *icoord0,
  46                                  int *icoord1,
  47                                  float *w);
  48
  49 typedef float (*compute_lambda_func)(const struct sp_sampler_view *sp_sview,
  50                                      const float s[TGSI_QUAD_SIZE],
  51                                      const float t[TGSI_QUAD_SIZE],
  52                                      const float p[TGSI_QUAD_SIZE]);
  53
  54 typedef void (*img_filter_func)(struct sp_sampler_view *sp_sview,
  55                                 struct sp_sampler *sp_samp,
  56                                 float s,
  57                                 float t,
  58                                 float p,
  59                                 unsigned level,
  60                                 unsigned face_id,
  61                                 float *rgba);
  62
  63 typedef void (*mip_filter_func)(struct sp_sampler_view *sp_sview,
  64                                 struct sp_sampler *sp_samp,
  65                                 img_filter_func min_filter,
  66                                 img_filter_func mag_filter,
  67                                 const float s[TGSI_QUAD_SIZE],
  68                                 const float t[TGSI_QUAD_SIZE],
  69                                 const float p[TGSI_QUAD_SIZE],
  70                                 const float c0[TGSI_QUAD_SIZE],
  71                                 const float lod[TGSI_QUAD_SIZE],
  72                                 enum tgsi_sampler_control control,
  73                                 float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  74
  75
  76 typedef void (*filter_func)(struct sp_sampler_view *sp_sview,
  77                             struct sp_sampler *sp_samp,
  78                             const float s[TGSI_QUAD_SIZE],
  79                             const float t[TGSI_QUAD_SIZE],
  80                             const float p[TGSI_QUAD_SIZE],
  81                             const float c0[TGSI_QUAD_SIZE],
  82                             const float lod[TGSI_QUAD_SIZE],
  83                             enum tgsi_sampler_control control,
  84                             float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  85
  86
  87 typedef void (*fetch_func)(struct sp_sampler_view *sp_sview,
  88                            const int i[TGSI_QUAD_SIZE],
  89                            const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
  90                            const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
  91                            float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  92
  93
  94 struct sp_sampler_view
  95 {
  96    struct pipe_sampler_view base;
  97
  98    /* For sp_get_samples_2d_linear_POT:
  99     */
 100    unsigned xpot;
 101    unsigned ypot;
 102
 103    boolean need_swizzle;
 104    boolean pot2d;
 105
 106    filter_func get_samples;
 107
 108    /* this is just abusing the sampler_view object as local storage */
 109    unsigned faces[TGSI_QUAD_SIZE];
 110
 111    /* these are different per shader type */
 112    struct softpipe_tex_tile_cache *cache;
 113    compute_lambda_func compute_lambda;
 114
 115 };
 116
 117
 118 struct sp_sampler {
 119    struct pipe_sampler_state base;
 120
 121    boolean min_mag_equal_repeat_linear;
 122    boolean min_mag_equal;
 123    unsigned min_img_filter;
 124
 125    wrap_nearest_func nearest_texcoord_s;
 126    wrap_nearest_func nearest_texcoord_t;
 127    wrap_nearest_func nearest_texcoord_p;
 128
 129    wrap_linear_func linear_texcoord_s;
 130    wrap_linear_func linear_texcoord_t;
 131    wrap_linear_func linear_texcoord_p;
 132
 133    mip_filter_func mip_filter;
 134 };
 135
 136
 137 /**
 138  * Subclass of tgsi_sampler
 139  */
 140 struct sp_tgsi_sampler
 141 {
 142    struct tgsi_sampler base;  /**< base class */
 143    struct sp_sampler *sp_sampler[PIPE_MAX_SAMPLERS];
 144    struct sp_sampler_view sp_sview[PIPE_MAX_SHADER_SAMPLER_VIEWS];
 145
 146 };
 147
 148 compute_lambda_func
 149 softpipe_get_lambda_func(const struct pipe_sampler_view *view, unsigned shader);
 150
 151
 152 void *
 153 softpipe_create_sampler_state(struct pipe_context *pipe,
 154                               const struct pipe_sampler_state *sampler);
 155
 156
 157 struct pipe_sampler_view *
 158 softpipe_create_sampler_view(struct pipe_context *pipe,
 159                              struct pipe_resource *resource,
 160                              const struct pipe_sampler_view *templ);
 161
 162
 163 struct sp_tgsi_sampler *
 164 sp_create_tgsi_sampler(void);
 165
 166
 167 #endif /* SP_TEX_SAMPLE_H */