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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   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 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 typedef float (*compute_lambda_from_grad_func)(const struct sp_sampler_view *sp_sview,
  57                                                const float derivs[3][2][TGSI_QUAD_SIZE],
  58                                                uint quad);
  59
  60 struct img_filter_args {
  61    float s;
  62    float t;
  63    float p;
  64    unsigned level;
  65    unsigned face_id;
  66    const int8_t *offset;
  67    bool gather_only;
  68    int gather_comp;
  69 };
  70
  71 typedef void (*img_filter_func)(const struct sp_sampler_view *sp_sview,
  72                                 const struct sp_sampler *sp_samp,
  73                                 const struct img_filter_args *args,
  74                                 float *rgba);
  75
  76 struct filter_args {
  77    enum tgsi_sampler_control control;
  78    const int8_t *offset;
  79    const uint *faces;
  80 };
  81
  82 typedef void (*mip_filter_func)(const struct sp_sampler_view *sp_sview,
  83                                 const struct sp_sampler *sp_samp,
  84                                 img_filter_func min_filter,
  85                                 img_filter_func mag_filter,
  86                                 const float s[TGSI_QUAD_SIZE],
  87                                 const float t[TGSI_QUAD_SIZE],
  88                                 const float p[TGSI_QUAD_SIZE],
  89                                 int gather_comp,
  90                                 const float lod[TGSI_QUAD_SIZE],
  91                                 const struct filter_args *args,
  92                                 float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  93
  94
  95 typedef void (*mip_level_func)(const struct sp_sampler_view *sp_sview,
  96                                const struct sp_sampler *sp_samp,
  97                                const float lod[TGSI_QUAD_SIZE],
  98                                float level[TGSI_QUAD_SIZE]);
  99
 100 typedef void (*fetch_func)(struct sp_sampler_view *sp_sview,
 101                            const int i[TGSI_QUAD_SIZE],
 102                            const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
 103                            const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
 104                            float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 105
 106
 107 struct sp_sampler_view
 108 {
 109    struct pipe_sampler_view base;
 110
 111    /* For sp_get_samples_2d_linear_POT:
 112     */
 113    unsigned xpot;
 114    unsigned ypot;
 115
 116    boolean need_swizzle;
 117    boolean pot2d;
 118    boolean need_cube_convert;
 119
 120    /* these are different per shader type */
 121    struct softpipe_tex_tile_cache *cache;
 122    compute_lambda_func compute_lambda;
 123    compute_lambda_from_grad_func compute_lambda_from_grad;
 124    union pipe_color_union border_color;
 125 };
 126
 127 struct sp_filter_funcs {
 128    mip_level_func relative_level;
 129    mip_filter_func filter;
 130 };
 131
 132 struct sp_sampler {
 133    struct pipe_sampler_state base;
 134
 135    boolean min_mag_equal_repeat_linear;
 136    boolean min_mag_equal;
 137    unsigned min_img_filter;
 138
 139    wrap_nearest_func nearest_texcoord_s;
 140    wrap_nearest_func nearest_texcoord_t;
 141    wrap_nearest_func nearest_texcoord_p;
 142
 143    wrap_linear_func linear_texcoord_s;
 144    wrap_linear_func linear_texcoord_t;
 145    wrap_linear_func linear_texcoord_p;
 146
 147    const struct sp_filter_funcs *filter_funcs;
 148 };
 149
 150
 151 /**
 152  * Subclass of tgsi_sampler
 153  */
 154 struct sp_tgsi_sampler
 155 {
 156    struct tgsi_sampler base;  /**< base class */
 157    struct sp_sampler *sp_sampler[PIPE_MAX_SAMPLERS];
 158    struct sp_sampler_view sp_sview[PIPE_MAX_SHADER_SAMPLER_VIEWS];
 159
 160 };
 161
 162 compute_lambda_func
 163 softpipe_get_lambda_func(const struct pipe_sampler_view *view,
 164                          enum pipe_shader_type shader);
 165
 166 compute_lambda_from_grad_func
 167 softpipe_get_lambda_from_grad_func(const struct pipe_sampler_view *view,
 168                                    enum pipe_shader_type shader);
 169
 170 void *
 171 softpipe_create_sampler_state(struct pipe_context *pipe,
 172                               const struct pipe_sampler_state *sampler);
 173
 174
 175 struct pipe_sampler_view *
 176 softpipe_create_sampler_view(struct pipe_context *pipe,
 177                              struct pipe_resource *resource,
 178                              const struct pipe_sampler_view *templ);
 179
 180
 181 struct sp_tgsi_sampler *
 182 sp_create_tgsi_sampler(void);
 183
 184
 185 #endif /* SP_TEX_SAMPLE_H */