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,
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  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
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  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
  90 typedef void (*mip_level_func)(struct sp_sampler_view *sp_sview,
  91                                struct sp_sampler *sp_samp,
  92                                const float lod[TGSI_QUAD_SIZE],
  93                                float level[TGSI_QUAD_SIZE]);
  94
  95 typedef void (*fetch_func)(struct sp_sampler_view *sp_sview,
  96                            const int i[TGSI_QUAD_SIZE],
  97                            const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
  98                            const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
  99                            float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 100
 101
 102 struct sp_sampler_view
 103 {
 104    struct pipe_sampler_view base;
 105
 106    /* For sp_get_samples_2d_linear_POT:
 107     */
 108    unsigned xpot;
 109    unsigned ypot;
 110
 111    boolean need_swizzle;
 112    boolean pot2d;
 113    boolean need_cube_convert;
 114
 115    /* this is just abusing the sampler_view object as local storage */
 116    unsigned faces[TGSI_QUAD_SIZE];
 117
 118    /* these are different per shader type */
 119    struct softpipe_tex_tile_cache *cache;
 120    compute_lambda_func compute_lambda;
 121
 122 };
 123
 124 struct sp_filter_funcs {
 125    mip_level_func relative_level;
 126    mip_filter_func filter;
 127 };
 128
 129 struct sp_sampler {
 130    struct pipe_sampler_state base;
 131
 132    boolean min_mag_equal_repeat_linear;
 133    boolean min_mag_equal;
 134    unsigned min_img_filter;
 135
 136    wrap_nearest_func nearest_texcoord_s;
 137    wrap_nearest_func nearest_texcoord_t;
 138    wrap_nearest_func nearest_texcoord_p;
 139
 140    wrap_linear_func linear_texcoord_s;
 141    wrap_linear_func linear_texcoord_t;
 142    wrap_linear_func linear_texcoord_p;
 143
 144    const struct sp_filter_funcs *filter_funcs;
 145 };
 146
 147
 148 /**
 149  * Subclass of tgsi_sampler
 150  */
 151 struct sp_tgsi_sampler
 152 {
 153    struct tgsi_sampler base;  /**< base class */
 154    struct sp_sampler *sp_sampler[PIPE_MAX_SAMPLERS];
 155    struct sp_sampler_view sp_sview[PIPE_MAX_SHADER_SAMPLER_VIEWS];
 156
 157 };
 158
 159 compute_lambda_func
 160 softpipe_get_lambda_func(const struct pipe_sampler_view *view, unsigned shader);
 161
 162
 163 void *
 164 softpipe_create_sampler_state(struct pipe_context *pipe,
 165                               const struct pipe_sampler_state *sampler);
 166
 167
 168 struct pipe_sampler_view *
 169 softpipe_create_sampler_view(struct pipe_context *pipe,
 170                              struct pipe_resource *resource,
 171                              const struct pipe_sampler_view *templ);
 172
 173
 174 struct sp_tgsi_sampler *
 175 sp_create_tgsi_sampler(void);
 176
 177
 178 #endif /* SP_TEX_SAMPLE_H */