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
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  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_sampler_view's state */
  58    enum pipe_format format;
  59    unsigned swizzle_r:3;
  60    unsigned swizzle_g:3;
  61    unsigned swizzle_b:3;
  62    unsigned swizzle_a:3;
  63
  64    /* pipe_texture's state */
  65    unsigned target:3;
  66    unsigned pot_width:1;
  67    unsigned pot_height:1;
  68    unsigned pot_depth:1;
  69
  70    /* pipe_sampler_state's state */
  71    unsigned wrap_s:3;
  72    unsigned wrap_t:3;
  73    unsigned wrap_r:3;
  74    unsigned min_img_filter:2;
  75    unsigned min_mip_filter:2;
  76    unsigned mag_img_filter:2;
  77    unsigned compare_mode:1;
  78    unsigned compare_func:3;
  79    unsigned normalized_coords:1;
  80    float lod_bias, min_lod, max_lod;
  81    float border_color[4];
  82 };
  83
  84
  85 /**
  86  * Sampler dynamic state.
  87  *
  88  * These are the bits of state from pipe_resource and pipe_sampler_state that
  89  * are computed in runtime.
  90  *
  91  * There are obtained through callbacks, as we don't want to tie the texture
  92  * sampling code generation logic to any particular texture layout or pipe
  93  * driver.
  94  */
  95 struct lp_sampler_dynamic_state
  96 {
  97
  98    /** Obtain the base texture width. */
  99    LLVMValueRef
 100    (*width)( struct lp_sampler_dynamic_state *state,
 101              LLVMBuilderRef builder,
 102              unsigned unit);
 103
 104    /** Obtain the base texture height. */
 105    LLVMValueRef
 106    (*height)( struct lp_sampler_dynamic_state *state,
 107               LLVMBuilderRef builder,
 108               unsigned unit);
 109
 110    /** Obtain the base texture depth. */
 111    LLVMValueRef
 112    (*depth)( struct lp_sampler_dynamic_state *state,
 113              LLVMBuilderRef builder,
 114              unsigned unit);
 115
 116    /** Obtain the number of mipmap levels (minus one). */
 117    LLVMValueRef
 118    (*last_level)( struct lp_sampler_dynamic_state *state,
 119                   LLVMBuilderRef builder,
 120                   unsigned unit);
 121
 122    LLVMValueRef
 123    (*row_stride)( struct lp_sampler_dynamic_state *state,
 124                   LLVMBuilderRef builder,
 125                   unsigned unit);
 126
 127    LLVMValueRef
 128    (*img_stride)( struct lp_sampler_dynamic_state *state,
 129                   LLVMBuilderRef builder,
 130                   unsigned unit);
 131
 132    LLVMValueRef
 133    (*data_ptr)( struct lp_sampler_dynamic_state *state,
 134                 LLVMBuilderRef builder,
 135                 unsigned unit);
 136
 137 };
 138
 139
 140 /**
 141  * Derive the sampler static state.
 142  */
 143 void
 144 lp_sampler_static_state(struct lp_sampler_static_state *state,
 145                         const struct pipe_sampler_view *view,
 146                         const struct pipe_sampler_state *sampler);
 147
 148
 149 LLVMValueRef
 150 lp_build_gather(LLVMBuilderRef builder,
 151                 unsigned length,
 152                 unsigned src_width,
 153                 unsigned dst_width,
 154                 LLVMValueRef base_ptr,
 155                 LLVMValueRef offsets);
 156
 157
 158 LLVMValueRef
 159 lp_build_sample_offset(struct lp_build_context *bld,
 160                        const struct util_format_description *format_desc,
 161                        LLVMValueRef x,
 162                        LLVMValueRef y,
 163                        LLVMValueRef z,
 164                        LLVMValueRef y_stride,
 165                        LLVMValueRef z_stride);
 166
 167
 168 void
 169 lp_build_sample_soa(LLVMBuilderRef builder,
 170                     const struct lp_sampler_static_state *static_state,
 171                     struct lp_sampler_dynamic_state *dynamic_state,
 172                     struct lp_type fp_type,
 173                     unsigned unit,
 174                     unsigned num_coords,
 175                     const LLVMValueRef *coords,
 176                     LLVMValueRef lodbias,
 177                     LLVMValueRef *texel);
 178
 179
 180
 181 #endif /* LP_BLD_SAMPLE_H */