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)(const float s[4],
  38                                   unsigned size,
  39                                   int icoord[4]);
  40
  41 typedef void (*wrap_linear_func)(const float s[4],
  42                                  unsigned size,
  43                                  int icoord0[4],
  44                                  int icoord1[4],
  45                                  float w[4]);
  46
  47 typedef float (*compute_lambda_func)(const struct sp_sampler_variant *sampler,
  48                                      const float s[QUAD_SIZE],
  49                                      const float t[QUAD_SIZE],
  50                                      const float p[QUAD_SIZE]);
  51
  52 typedef void (*filter_func)(struct tgsi_sampler *tgsi_sampler,
  53                             const float s[QUAD_SIZE],
  54                             const float t[QUAD_SIZE],
  55                             const float p[QUAD_SIZE],
  56                             const float c0[QUAD_SIZE],
  57                             enum tgsi_sampler_control control,
  58                             float rgba[NUM_CHANNELS][QUAD_SIZE]);
  59
  60
  61 union sp_sampler_key {
  62    struct {
  63       unsigned target:3;
  64       unsigned is_pot:1;
  65       unsigned processor:2;
  66       unsigned unit:4;
  67       unsigned swizzle_r:3;
  68       unsigned swizzle_g:3;
  69       unsigned swizzle_b:3;
  70       unsigned swizzle_a:3;
  71       unsigned pad:10;
  72    } bits;
  73    unsigned value;
  74 };
  75
  76 /**
  77  * Subclass of tgsi_sampler
  78  */
  79 struct sp_sampler_variant
  80 {
  81    struct tgsi_sampler base;  /**< base class */
  82
  83    union sp_sampler_key key;
  84
  85    /* The owner of this struct:
  86     */
  87    const struct pipe_sampler_state *sampler;
  88
  89
  90    /* Currently bound texture:
  91     */
  92    const struct pipe_resource *texture;
  93    struct softpipe_tex_tile_cache *cache;
  94
  95    unsigned processor;
  96
  97    /* For sp_get_samples_2d_linear_POT:
  98     */
  99    unsigned xpot;
 100    unsigned ypot;
 101    unsigned level;
 102
 103    unsigned faces[4];
 104
 105    wrap_nearest_func nearest_texcoord_s;
 106    wrap_nearest_func nearest_texcoord_t;
 107    wrap_nearest_func nearest_texcoord_p;
 108
 109    wrap_linear_func linear_texcoord_s;
 110    wrap_linear_func linear_texcoord_t;
 111    wrap_linear_func linear_texcoord_p;
 112
 113    filter_func min_img_filter;
 114    filter_func mag_img_filter;
 115
 116    compute_lambda_func compute_lambda;
 117
 118    filter_func mip_filter;
 119    filter_func compare;
 120    filter_func sample_target;
 121
 122    /* Linked list:
 123     */
 124    struct sp_sampler_variant *next;
 125 };
 126
 127 struct sp_sampler;
 128
 129 /* Create a sampler variant for a given set of non-orthogonal state.  Currently the
 130  */
 131 struct sp_sampler_variant *
 132 sp_create_sampler_variant( const struct pipe_sampler_state *sampler,
 133                            const union sp_sampler_key key );
 134
 135 void sp_sampler_variant_bind_texture( struct sp_sampler_variant *variant,
 136                                       struct softpipe_tex_tile_cache *tex_cache,
 137                                       const struct pipe_resource *tex );
 138
 139 void sp_sampler_variant_destroy( struct sp_sampler_variant * );
 140
 141
 142
 143 static INLINE struct sp_sampler_variant *
 144 sp_sampler_variant(const struct tgsi_sampler *sampler)
 145 {
 146    return (struct sp_sampler_variant *) sampler;
 147 }
 148
 149 extern void
 150 sp_get_samples(struct tgsi_sampler *tgsi_sampler,
 151                const float s[QUAD_SIZE],
 152                const float t[QUAD_SIZE],
 153                const float p[QUAD_SIZE],
 154                float lodbias,
 155                float rgba[NUM_CHANNELS][QUAD_SIZE]);
 156
 157
 158 #endif /* SP_TEX_SAMPLE_H */