src/gallium/drivers/llvmpipe/lp_tex_sample.h

   1 /**************************************************************************
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   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  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 lp_sampler_static_state;
  38
  39
  40 /**
  41  * Subclass of tgsi_sampler
  42  */
  43 struct lp_shader_sampler
  44 {
  45    struct tgsi_sampler base;  /**< base class */
  46
  47    unsigned processor;
  48
  49    /* For lp_get_samples_2d_linear_POT:
  50     */
  51    unsigned xpot;
  52    unsigned ypot;
  53    unsigned level;
  54
  55    const struct pipe_texture *texture;
  56    const struct pipe_sampler_state *sampler;
  57 };
  58
  59
  60
  61 static INLINE struct lp_shader_sampler *
  62 lp_shader_sampler(const struct tgsi_sampler *sampler)
  63 {
  64    return (struct lp_shader_sampler *) sampler;
  65 }
  66
  67
  68
  69 extern void
  70 lp_get_samples(struct tgsi_sampler *tgsi_sampler,
  71                const float s[QUAD_SIZE],
  72                const float t[QUAD_SIZE],
  73                const float p[QUAD_SIZE],
  74                float lodbias,
  75                float rgba[NUM_CHANNELS][QUAD_SIZE]);
  76
  77
  78 /**
  79  * Texture sampling code generator that just calls lp_get_samples C function
  80  * for the actual sampling computation.
  81  *
  82  * @param context_ptr LLVM value with the pointer to the struct lp_jit_context.
  83  */
  84 struct lp_build_sampler_soa *
  85 lp_c_sampler_soa_create(LLVMValueRef context_ptr);
  86
  87
  88 /**
  89  * Pure-LLVM texture sampling code generator.
  90  *
  91  * @param context_ptr LLVM value with the pointer to the struct lp_jit_context.
  92  */
  93 struct lp_build_sampler_soa *
  94 lp_llvm_sampler_soa_create(const struct lp_sampler_static_state *key,
  95                            LLVMValueRef context_ptr);
  96
  97
  98 #endif /* LP_TEX_SAMPLE_H */