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