src/gallium/drivers/llvmpipe/lp_bld_format.h

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  27
  28 #ifndef LP_BLD_H
  29 #define LP_BLD_H
  30
  31
  32 /**
  33  * @file
  34  * LLVM IR building helpers interfaces.
  35  *
  36  * We use LLVM-C bindings for now. They are not documented, but follow the C++
  37  * interfaces very closely, and appear to be complete enough for code
  38  * genration. See
  39  * http://npcontemplation.blogspot.com/2008/06/secret-of-llvm-c-bindings.html
  40  * for a standalone example.
  41  */
  42
  43 #include <llvm-c/Core.h>
  44
  45 #include "pipe/p_format.h"
  46
  47
  48 union lp_type;
  49
  50
  51 /**
  52  * Unpack a pixel into its RGBA components.
  53  *
  54  * @param packed integer.
  55  *
  56  * @return RGBA in a 4 floats vector.
  57  */
  58 LLVMValueRef
  59 lp_build_unpack_rgba(LLVMBuilderRef builder,
  60                      enum pipe_format format,
  61                      LLVMValueRef packed);
  62
  63
  64 /**
  65  * Pack a pixel.
  66  *
  67  * @param rgba 4 float vector with the unpacked components.
  68  */
  69 LLVMValueRef
  70 lp_build_pack_rgba(LLVMBuilderRef builder,
  71                    enum pipe_format format,
  72                    LLVMValueRef rgba);
  73
  74
  75 /**
  76  * Load a pixel into its RGBA components.
  77  *
  78  * @param ptr value with the pointer to the packed pixel. Pointer type is
  79  * irrelevant.
  80  *
  81  * @return RGBA in a 4 floats vector.
  82  */
  83 LLVMValueRef
  84 lp_build_load_rgba(LLVMBuilderRef builder,
  85                    enum pipe_format format,
  86                    LLVMValueRef ptr);
  87
  88
  89 /**
  90  * Store a pixel.
  91  *
  92  * @param rgba 4 float vector with the unpacked components.
  93  */
  94 void
  95 lp_build_store_rgba(LLVMBuilderRef builder,
  96                     enum pipe_format format,
  97                     LLVMValueRef ptr,
  98                     LLVMValueRef rgba);
  99
 100
 101 #endif /* !LP_BLD_H */