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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  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 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    bool gather_only;
  64    int gather_comp;
  65 };
  66
  67 typedef void (*img_filter_func)(struct sp_sampler_view *sp_sview,
  68                                 struct sp_sampler *sp_samp,
  69                                 const struct img_filter_args *args,
  70                                 float *rgba);
  71
  72 struct filter_args {
  73    enum tgsi_sampler_control control;
  74    const int8_t *offset;
  75 };
  76
  77 typedef void (*mip_filter_func)(struct sp_sampler_view *sp_sview,
  78                                 struct sp_sampler *sp_samp,
  79                                 img_filter_func min_filter,
  80                                 img_filter_func mag_filter,
  81                                 const float s[TGSI_QUAD_SIZE],
  82                                 const float t[TGSI_QUAD_SIZE],
  83                                 const float p[TGSI_QUAD_SIZE],
  84                                 const float c0[TGSI_QUAD_SIZE],
  85                                 const float lod[TGSI_QUAD_SIZE],
  86                                 const struct filter_args *args,
  87                                 float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  88
  89 typedef void (*fetch_func)(struct sp_sampler_view *sp_sview,
  90                            const int i[TGSI_QUAD_SIZE],
  91                            const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
  92                            const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
  93                            float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  94
  95
  96 struct sp_sampler_view
  97 {
  98    struct pipe_sampler_view base;
  99
 100    /* For sp_get_samples_2d_linear_POT:
 101     */
 102    unsigned xpot;
 103    unsigned ypot;
 104
 105    boolean need_swizzle;
 106    boolean pot2d;
 107    boolean need_cube_convert;
 108
 109    /* this is just abusing the sampler_view object as local storage */
 110    unsigned faces[TGSI_QUAD_SIZE];
 111
 112    /* these are different per shader type */
 113    struct softpipe_tex_tile_cache *cache;
 114    compute_lambda_func compute_lambda;
 115
 116 };
 117
 118 struct sp_filter_funcs {
 119    mip_filter_func filter;
 120 };
 121
 122 struct sp_sampler {
 123    struct pipe_sampler_state base;
 124
 125    boolean min_mag_equal_repeat_linear;
 126    boolean min_mag_equal;
 127    unsigned min_img_filter;
 128
 129    wrap_nearest_func nearest_texcoord_s;
 130    wrap_nearest_func nearest_texcoord_t;
 131    wrap_nearest_func nearest_texcoord_p;
 132
 133    wrap_linear_func linear_texcoord_s;
 134    wrap_linear_func linear_texcoord_t;
 135    wrap_linear_func linear_texcoord_p;
 136
 137    const struct sp_filter_funcs *filter_funcs;
 138 };
 139
 140
 141 /**
 142  * Subclass of tgsi_sampler
 143  */
 144 struct sp_tgsi_sampler
 145 {
 146    struct tgsi_sampler base;  /**< base class */
 147    struct sp_sampler *sp_sampler[PIPE_MAX_SAMPLERS];
 148    struct sp_sampler_view sp_sview[PIPE_MAX_SHADER_SAMPLER_VIEWS];
 149
 150 };
 151
 152 compute_lambda_func
 153 softpipe_get_lambda_func(const struct pipe_sampler_view *view, unsigned shader);
 154
 155
 156 void *
 157 softpipe_create_sampler_state(struct pipe_context *pipe,
 158                               const struct pipe_sampler_state *sampler);
 159
 160
 161 struct pipe_sampler_view *
 162 softpipe_create_sampler_view(struct pipe_context *pipe,
 163                              struct pipe_resource *resource,
 164                              const struct pipe_sampler_view *templ);
 165
 166
 167 struct sp_tgsi_sampler *
 168 sp_create_tgsi_sampler(void);
 169
 170
 171 #endif /* SP_TEX_SAMPLE_H */