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      1 /**************************************************************************
      2  *
      3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
      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 TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     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 #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    void (*transform_property)(struct tgsi_transform_context *ctx,
     57                               struct tgsi_full_property *prop);
     58 
     59    /**
     60     * Called at end of input program to allow caller to append extra
     61     * instructions.  Return number of tokens emitted.
     62     */
     63    void (*epilog)(struct tgsi_transform_context *ctx);
     64 
     65 
     66 /*** PRIVATE ***/
     67 
     68    /**
     69     * These are setup by tgsi_transform_shader() and cannot be overridden.
     70     * Meant to be called from in the above user callback functions.
     71     */
     72    void (*emit_instruction)(struct tgsi_transform_context *ctx,
     73                             const struct tgsi_full_instruction *inst);
     74    void (*emit_declaration)(struct tgsi_transform_context *ctx,
     75                             const struct tgsi_full_declaration *decl);
     76    void (*emit_immediate)(struct tgsi_transform_context *ctx,
     77                           const struct tgsi_full_immediate *imm);
     78    void (*emit_property)(struct tgsi_transform_context *ctx,
     79                          const struct tgsi_full_property *prop);
     80 
     81    struct tgsi_header *header;
     82    uint max_tokens_out;
     83    struct tgsi_token *tokens_out;
     84    uint ti;
     85 };
     86 
     87 
     88 
     89 extern int
     90 tgsi_transform_shader(const struct tgsi_token *tokens_in,
     91                       struct tgsi_token *tokens_out,
     92                       uint max_tokens_out,
     93                       struct tgsi_transform_context *ctx);
     94 
     95 
     96 #endif /* TGSI_TRANSFORM_H */
     97