src/gallium/auxiliary/gallivm/lp_bld_tgsi.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  * TGSI to LLVM IR translation.
  31  *
  32  * @author Jose Fonseca <jfonseca@vmware.com>
  33  */
  34
  35 #ifndef LP_BLD_TGSI_H
  36 #define LP_BLD_TGSI_H
  37
  38 #include "gallivm/lp_bld.h"
  39
  40
  41 struct tgsi_token;
  42 struct tgsi_shader_info;
  43 struct lp_type;
  44 struct lp_build_context;
  45 struct lp_build_mask_context;
  46
  47
  48 enum lp_build_tex_modifier {
  49    LP_BLD_TEX_MODIFIER_NONE = 0,
  50    LP_BLD_TEX_MODIFIER_PROJECTED,
  51    LP_BLD_TEX_MODIFIER_LOD_BIAS,
  52    LP_BLD_TEX_MODIFIER_EXPLICIT_LOD,
  53    LP_BLD_TEX_MODIFIER_EXPLICIT_DERIV
  54 };
  55
  56
  57 /**
  58  * Sampler code generation interface.
  59  *
  60  * Although texture sampling is a requirement for TGSI translation, it is
  61  * a very different problem with several different approaches to it. This
  62  * structure establishes an interface for texture sampling code generation, so
  63  * that we can easily use different texture sampling strategies.
  64  */
  65 struct lp_build_sampler_soa
  66 {
  67    void
  68    (*destroy)( struct lp_build_sampler_soa *sampler );
  69
  70    void
  71    (*emit_fetch_texel)( const struct lp_build_sampler_soa *sampler,
  72                         LLVMBuilderRef builder,
  73                         struct lp_type type,
  74                         unsigned unit,
  75                         unsigned num_coords,
  76                         const LLVMValueRef *coords,
  77                         const LLVMValueRef *ddx,
  78                         const LLVMValueRef *ddy,
  79                         LLVMValueRef lod_bias, /* optional */
  80                         LLVMValueRef explicit_lod, /* optional */
  81                         LLVMValueRef *texel);
  82 };
  83
  84
  85 struct lp_build_sampler_aos
  86 {
  87    LLVMValueRef
  88    (*emit_fetch_texel)( struct lp_build_sampler_aos *sampler,
  89                         struct lp_build_context *bld,
  90                         unsigned target, /* TGSI_TEXTURE_* */
  91                         unsigned unit,
  92                         LLVMValueRef coords,
  93                         LLVMValueRef ddx,
  94                         LLVMValueRef ddy,
  95                         enum lp_build_tex_modifier modifier);
  96 };
  97
  98
  99 void
 100 lp_build_tgsi_soa(LLVMBuilderRef builder,
 101                   const struct tgsi_token *tokens,
 102                   struct lp_type type,
 103                   struct lp_build_mask_context *mask,
 104                   LLVMValueRef consts_ptr,
 105                   const LLVMValueRef *pos,
 106                   const LLVMValueRef (*inputs)[4],
 107                   LLVMValueRef (*outputs)[4],
 108                   struct lp_build_sampler_soa *sampler,
 109                   const struct tgsi_shader_info *info);
 110
 111
 112 void
 113 lp_build_tgsi_aos(LLVMBuilderRef builder,
 114                   const struct tgsi_token *tokens,
 115                   struct lp_type type,
 116                   const unsigned char swizzles[4],
 117                   LLVMValueRef consts_ptr,
 118                   const LLVMValueRef *inputs,
 119                   LLVMValueRef *outputs,
 120                   struct lp_build_sampler_aos *sampler,
 121                   const struct tgsi_shader_info *info);
 122
 123
 124 #endif /* LP_BLD_TGSI_H */