src/gallium/auxiliary/gallivm/lp_bld_sample.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  * Texture sampling.
  31  *
  32  * @author Jose Fonseca <jfonseca@vmware.com>
  33  */
  34
  35 #ifndef LP_BLD_SAMPLE_H
  36 #define LP_BLD_SAMPLE_H
  37
  38
  39 #include "gallivm/lp_bld.h"
  40
  41 struct pipe_resource;
  42 struct pipe_sampler_view;
  43 struct pipe_sampler_state;
  44 struct util_format_description;
  45 struct lp_type;
  46 struct lp_build_context;
  47
  48
  49 /**
  50  * Sampler static state.
  51  *
  52  * These are the bits of state from pipe_resource and pipe_sampler_state that
  53  * are embedded in the generated code.
  54  */
  55 struct lp_sampler_static_state
  56 {
  57    /* pipe_texture's state */
  58    enum pipe_format format;
  59    unsigned target:3;
  60    unsigned pot_width:1;
  61    unsigned pot_height:1;
  62    unsigned pot_depth:1;
  63
  64    /* pipe_sampler_state's state */
  65    unsigned wrap_s:3;
  66    unsigned wrap_t:3;
  67    unsigned wrap_r:3;
  68    unsigned min_img_filter:2;
  69    unsigned min_mip_filter:2;
  70    unsigned mag_img_filter:2;
  71    unsigned compare_mode:1;
  72    unsigned compare_func:3;
  73    unsigned normalized_coords:1;
  74    float lod_bias, min_lod, max_lod;
  75    float border_color[4];
  76 };
  77
  78
  79 /**
  80  * Sampler dynamic state.
  81  *
  82  * These are the bits of state from pipe_resource and pipe_sampler_state that
  83  * are computed in runtime.
  84  *
  85  * There are obtained through callbacks, as we don't want to tie the texture
  86  * sampling code generation logic to any particular texture layout or pipe
  87  * driver.
  88  */
  89 struct lp_sampler_dynamic_state
  90 {
  91
  92    /** Obtain the base texture width. */
  93    LLVMValueRef
  94    (*width)( struct lp_sampler_dynamic_state *state,
  95              LLVMBuilderRef builder,
  96              unsigned unit);
  97
  98    /** Obtain the base texture height. */
  99    LLVMValueRef
 100    (*height)( struct lp_sampler_dynamic_state *state,
 101               LLVMBuilderRef builder,
 102               unsigned unit);
 103
 104    /** Obtain the base texture depth. */
 105    LLVMValueRef
 106    (*depth)( struct lp_sampler_dynamic_state *state,
 107              LLVMBuilderRef builder,
 108              unsigned unit);
 109
 110    /** Obtain the number of mipmap levels (minus one). */
 111    LLVMValueRef
 112    (*last_level)( struct lp_sampler_dynamic_state *state,
 113                   LLVMBuilderRef builder,
 114                   unsigned unit);
 115
 116    LLVMValueRef
 117    (*row_stride)( struct lp_sampler_dynamic_state *state,
 118                   LLVMBuilderRef builder,
 119                   unsigned unit);
 120
 121    LLVMValueRef
 122    (*img_stride)( struct lp_sampler_dynamic_state *state,
 123                   LLVMBuilderRef builder,
 124                   unsigned unit);
 125
 126    LLVMValueRef
 127    (*data_ptr)( struct lp_sampler_dynamic_state *state,
 128                 LLVMBuilderRef builder,
 129                 unsigned unit);
 130
 131 };
 132
 133
 134 /**
 135  * Derive the sampler static state.
 136  */
 137 void
 138 lp_sampler_static_state(struct lp_sampler_static_state *state,
 139                         const struct pipe_sampler_view *view,
 140                         const struct pipe_sampler_state *sampler);
 141
 142
 143 LLVMValueRef
 144 lp_build_gather(LLVMBuilderRef builder,
 145                 unsigned length,
 146                 unsigned src_width,
 147                 unsigned dst_width,
 148                 LLVMValueRef base_ptr,
 149                 LLVMValueRef offsets);
 150
 151
 152 LLVMValueRef
 153 lp_build_sample_offset(struct lp_build_context *bld,
 154                        const struct util_format_description *format_desc,
 155                        LLVMValueRef x,
 156                        LLVMValueRef y,
 157                        LLVMValueRef z,
 158                        LLVMValueRef y_stride,
 159                        LLVMValueRef z_stride);
 160
 161
 162 void
 163 lp_build_sample_soa(LLVMBuilderRef builder,
 164                     const struct lp_sampler_static_state *static_state,
 165                     struct lp_sampler_dynamic_state *dynamic_state,
 166                     struct lp_type fp_type,
 167                     unsigned unit,
 168                     unsigned num_coords,
 169                     const LLVMValueRef *coords,
 170                     LLVMValueRef lodbias,
 171                     LLVMValueRef *texel);
 172
 173
 174
 175 #endif /* LP_BLD_SAMPLE_H */