1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2007  Brian Paul   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 "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * 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
32typedef void (*FetchTexelLodFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
33                                  GLfloat lambda, GLuint unit, GLfloat color[4]);
34
35typedef 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 */
49struct 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   GLint AddressReg[MAX_PROGRAM_ADDRESS_REGS][4];
67   GLfloat SystemValues[SYSTEM_VALUE_MAX][4];
68
69   const GLubyte *Samplers;  /** Array mapping sampler var to tex unit */
70
71   GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */
72   GLuint StackDepth; /**< Index/ptr to top of CallStack[] */
73
74   /** Texture fetch functions */
75   FetchTexelLodFunc FetchTexelLod;
76   FetchTexelDerivFunc FetchTexelDeriv;
77};
78
79
80extern GLboolean
81_mesa_execute_program(struct gl_context *ctx,
82                      const struct gl_program *program,
83                      struct gl_program_machine *machine);
84
85
86#endif /* PROG_EXECUTE_H */
87