1 /*
2  * Mesa 3-D graphics library
3  * Version:  7.0.3
4  *
5  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11  * and/or sell copies of the Software, and to permit persons to whom the
12  * Software is furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included
15  * in all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  */
24 
25 #ifndef PROG_EXECUTE_H
26 #define PROG_EXECUTE_H
27 
28 #include "main/config.h"
29 #include "main/mtypes.h"
30 
31 
32 typedef void (*FetchTexelLodFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
33                                   GLfloat lambda, GLuint unit, GLfloat color[4]);
34 
35 typedef void (*FetchTexelDerivFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
36                                     const GLfloat texdx[4],
37                                     const GLfloat texdy[4],
38                                     GLfloat lodBias,
39                                     GLuint unit, GLfloat color[4]);
40 
41 
42 /** NOTE: This must match SWRAST_MAX_WIDTH */
43 #define PROG_MAX_WIDTH 16384
44 
45 
46 /**
47  * Virtual machine state used during execution of vertex/fragment programs.
48  */
49 struct gl_program_machine
50 {
51    const struct gl_program *CurProgram;
52 
53    /** Fragment Input attributes */
54    GLfloat (*Attribs)[PROG_MAX_WIDTH][4];
55    GLfloat (*DerivX)[4];
56    GLfloat (*DerivY)[4];
57    GLuint NumDeriv; /**< Max index into DerivX/Y arrays */
58    GLuint CurElement; /**< Index into Attribs arrays */
59 
60    /** Vertex Input attribs */
61    GLfloat VertAttribs[VERT_ATTRIB_MAX][4];
62 
63    GLfloat Temporaries[MAX_PROGRAM_TEMPS][4];
64    GLfloat Outputs[MAX_PROGRAM_OUTPUTS][4];
65    GLfloat (*EnvParams)[4]; /**< Vertex or Fragment env parameters */
66    GLuint CondCodes[4];  /**< COND_* value for x/y/z/w */
67    GLint AddressReg[MAX_PROGRAM_ADDRESS_REGS][4];
68    GLfloat SystemValues[SYSTEM_VALUE_MAX][4];
69 
70    const GLubyte *Samplers;  /** Array mapping sampler var to tex unit */
71 
72    GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */
73    GLuint StackDepth; /**< Index/ptr to top of CallStack[] */
74 
75    /** Texture fetch functions */
76    FetchTexelLodFunc FetchTexelLod;
77    FetchTexelDerivFunc FetchTexelDeriv;
78 };
79 
80 
81 extern void
82 _mesa_get_program_register(struct gl_context *ctx, gl_register_file file,
83                            GLuint index, GLfloat val[4]);
84 
85 extern GLboolean
86 _mesa_execute_program(struct gl_context *ctx,
87                       const struct gl_program *program,
88                       struct gl_program_machine *machine);
89 
90 
91 #endif /* PROG_EXECUTE_H */
92