src/gallium/auxiliary/tgsi/tgsi_transform.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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   7  * copy of this software and associated documentation files (the
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  11  * permit persons to whom the Software is furnished to do so, subject to
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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.
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  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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  26  **************************************************************************/
  27
  28 #ifndef TGSI_TRANSFORM_H
  29 #define TGSI_TRANSFORM_H
  30
  31
  32 #include "pipe/p_shader_tokens.h"
  33 #include "tgsi/tgsi_parse.h"
  34 #include "tgsi/tgsi_build.h"
  35
  36
  37
  38 /**
  39  * Subclass this to add caller-specific data
  40  */
  41 struct tgsi_transform_context
  42 {
  43 /**** PUBLIC ***/
  44
  45    /**
  46     * User-defined callbacks invoked per instruction.
  47     */
  48    void (*transform_instruction)(struct tgsi_transform_context *ctx,
  49                                  struct tgsi_full_instruction *inst);
  50
  51    void (*transform_declaration)(struct tgsi_transform_context *ctx,
  52                                  struct tgsi_full_declaration *decl);
  53
  54    void (*transform_immediate)(struct tgsi_transform_context *ctx,
  55                                struct tgsi_full_immediate *imm);
  56
  57    /**
  58     * Called at end of input program to allow caller to append extra
  59     * instructions.  Return number of tokens emitted.
  60     */
  61    void (*epilog)(struct tgsi_transform_context *ctx);
  62
  63
  64 /*** PRIVATE ***/
  65
  66    /**
  67     * These are setup by tgsi_transform_shader() and cannot be overridden.
  68     * Meant to be called from in the above user callback functions.
  69     */
  70    void (*emit_instruction)(struct tgsi_transform_context *ctx,
  71                             const struct tgsi_full_instruction *inst);
  72    void (*emit_declaration)(struct tgsi_transform_context *ctx,
  73                             const struct tgsi_full_declaration *decl);
  74    void (*emit_immediate)(struct tgsi_transform_context *ctx,
  75                           const struct tgsi_full_immediate *imm);
  76
  77    struct tgsi_header *header;
  78    uint max_tokens_out;
  79    struct tgsi_token *tokens_out;
  80    uint ti;
  81 };
  82
  83
  84
  85 extern int
  86 tgsi_transform_shader(const struct tgsi_token *tokens_in,
  87                       struct tgsi_token *tokens_out,
  88                       uint max_tokens_out,
  89                       struct tgsi_transform_context *ctx);
  90
  91
  92 #endif /* TGSI_TRANSFORM_H */