src/gallium/drivers/softpipe/sp_tex_sample.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  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 struct sp_sampler_variant;
  36
  37 typedef void (*wrap_nearest_func)(float s,
  38                                   unsigned size,
  39                                   int *icoord);
  40
  41 typedef void (*wrap_linear_func)(float s,
  42                                  unsigned size,
  43                                  int *icoord0,
  44                                  int *icoord1,
  45                                  float *w);
  46
  47 typedef float (*compute_lambda_func)(const struct sp_sampler_variant *sampler,
  48                                      const float s[TGSI_QUAD_SIZE],
  49                                      const float t[TGSI_QUAD_SIZE],
  50                                      const float p[TGSI_QUAD_SIZE]);
  51
  52 typedef void (*img_filter_func)(struct tgsi_sampler *tgsi_sampler,
  53                                 float s,
  54                                 float t,
  55                                 float p,
  56                                 unsigned level,
  57                                 unsigned face_id,
  58                                 float *rgba);
  59
  60 typedef void (*filter_func)(struct tgsi_sampler *tgsi_sampler,
  61                             const float s[TGSI_QUAD_SIZE],
  62                             const float t[TGSI_QUAD_SIZE],
  63                             const float p[TGSI_QUAD_SIZE],
  64                             const float c0[TGSI_QUAD_SIZE],
  65                             const float lod[TGSI_QUAD_SIZE],
  66                             enum tgsi_sampler_control control,
  67                             float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
  68
  69
  70 union sp_sampler_key {
  71    struct {
  72       unsigned target:5;
  73       unsigned is_pot:1;
  74       unsigned processor:2;
  75       unsigned unit:4;
  76       unsigned swizzle_r:3;
  77       unsigned swizzle_g:3;
  78       unsigned swizzle_b:3;
  79       unsigned swizzle_a:3;
  80       unsigned pad:8;
  81    } bits;
  82    unsigned value;
  83 };
  84
  85 /**
  86  * Subclass of tgsi_sampler
  87  */
  88 struct sp_sampler_variant
  89 {
  90    struct tgsi_sampler base;  /**< base class */
  91
  92    union sp_sampler_key key;
  93
  94    /* The owner of this struct:
  95     */
  96    const struct pipe_sampler_state *sampler;
  97
  98
  99    /* Currently bound texture:
 100     */
 101    const struct pipe_sampler_view *view;
 102    struct softpipe_tex_tile_cache *cache;
 103
 104    unsigned processor;
 105
 106    /* For sp_get_samples_2d_linear_POT:
 107     */
 108    unsigned xpot;
 109    unsigned ypot;
 110
 111    unsigned faces[TGSI_QUAD_SIZE];
 112
 113    wrap_nearest_func nearest_texcoord_s;
 114    wrap_nearest_func nearest_texcoord_t;
 115    wrap_nearest_func nearest_texcoord_p;
 116
 117    wrap_linear_func linear_texcoord_s;
 118    wrap_linear_func linear_texcoord_t;
 119    wrap_linear_func linear_texcoord_p;
 120
 121    img_filter_func min_img_filter;
 122    img_filter_func mag_img_filter;
 123
 124    compute_lambda_func compute_lambda;
 125
 126    filter_func mip_filter;
 127    filter_func compare;
 128    filter_func sample_target;
 129
 130    /* Linked list:
 131     */
 132    struct sp_sampler_variant *next;
 133 };
 134
 135 struct sp_sampler;
 136
 137 /* Create a sampler variant for a given set of non-orthogonal state.  Currently the
 138  */
 139 struct sp_sampler_variant *
 140 sp_create_sampler_variant( const struct pipe_sampler_state *sampler,
 141                            const union sp_sampler_key key );
 142
 143 void sp_sampler_variant_bind_view( struct sp_sampler_variant *variant,
 144                                    struct softpipe_tex_tile_cache *tex_cache,
 145                                    const struct pipe_sampler_view *view );
 146
 147 void sp_sampler_variant_destroy( struct sp_sampler_variant * );
 148
 149
 150
 151 static INLINE struct sp_sampler_variant *
 152 sp_sampler_variant(const struct tgsi_sampler *sampler)
 153 {
 154    return (struct sp_sampler_variant *) sampler;
 155 }
 156
 157 extern void
 158 sp_get_samples(struct tgsi_sampler *tgsi_sampler,
 159                const float s[TGSI_QUAD_SIZE],
 160                const float t[TGSI_QUAD_SIZE],
 161                const float p[TGSI_QUAD_SIZE],
 162                float lodbias,
 163                float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 164
 165
 166 #endif /* SP_TEX_SAMPLE_H */