src/gallium/drivers/llvmpipe/lp_tex_sample.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
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   9  * without limitation the rights to use, copy, modify, merge, publish,
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
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  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
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  26  **************************************************************************/
  27
  28 #ifndef LP_TEX_SAMPLE_H
  29 #define LP_TEX_SAMPLE_H
  30
  31
  32 #include <llvm-c/Core.h>
  33
  34 #include "tgsi/tgsi_exec.h"
  35
  36
  37 struct llvmpipe_tex_tile_cache;
  38 struct lp_sampler_static_state;
  39
  40
  41 /**
  42  * Subclass of tgsi_sampler
  43  */
  44 struct lp_shader_sampler
  45 {
  46    struct tgsi_sampler base;  /**< base class */
  47
  48    unsigned processor;
  49
  50    /* For lp_get_samples_2d_linear_POT:
  51     */
  52    unsigned xpot;
  53    unsigned ypot;
  54    unsigned level;
  55
  56    const struct pipe_texture *texture;
  57    const struct pipe_sampler_state *sampler;
  58
  59    struct llvmpipe_tex_tile_cache *cache;
  60 };
  61
  62
  63
  64 static INLINE struct lp_shader_sampler *
  65 lp_shader_sampler(const struct tgsi_sampler *sampler)
  66 {
  67    return (struct lp_shader_sampler *) sampler;
  68 }
  69
  70
  71
  72 extern void
  73 lp_get_samples(struct tgsi_sampler *tgsi_sampler,
  74                const float s[QUAD_SIZE],
  75                const float t[QUAD_SIZE],
  76                const float p[QUAD_SIZE],
  77                float lodbias,
  78                float rgba[NUM_CHANNELS][QUAD_SIZE]);
  79
  80
  81 /**
  82  * Texture sampling code generator that just calls lp_get_samples C function
  83  * for the actual sampling computation.
  84  *
  85  * @param context_ptr LLVM value with the pointer to the struct lp_jit_context.
  86  */
  87 struct lp_build_sampler_soa *
  88 lp_c_sampler_soa_create(LLVMValueRef context_ptr);
  89
  90
  91 /**
  92  * Pure-LLVM texture sampling code generator.
  93  *
  94  * @param context_ptr LLVM value with the pointer to the struct lp_jit_context.
  95  */
  96 struct lp_build_sampler_soa *
  97 lp_llvm_sampler_soa_create(const struct lp_sampler_static_state *key,
  98                            LLVMValueRef context_ptr);
  99
 100
 101 #endif /* LP_TEX_SAMPLE_H */