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/glheader.h"
30#include "compiler/shader_enums.h"
31
32struct gl_context;
33
34typedef void (*FetchTexelLodFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
35                                  GLfloat lambda, GLuint unit, GLfloat color[4]);
36
37typedef void (*FetchTexelDerivFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
38                                    const GLfloat texdx[4],
39                                    const GLfloat texdy[4],
40                                    GLfloat lodBias,
41                                    GLuint unit, GLfloat color[4]);
42
43
44/** NOTE: This must match SWRAST_MAX_WIDTH */
45#define PROG_MAX_WIDTH 16384
46
47
48/**
49 * Virtual machine state used during execution of vertex/fragment programs.
50 */
51struct gl_program_machine
52{
53   const struct gl_program *CurProgram;
54
55   /** Fragment Input attributes */
56   GLfloat (*Attribs)[PROG_MAX_WIDTH][4];
57   GLfloat (*DerivX)[4];
58   GLfloat (*DerivY)[4];
59   GLuint NumDeriv; /**< Max index into DerivX/Y arrays */
60   GLuint CurElement; /**< Index into Attribs arrays */
61
62   /** Vertex Input attribs */
63   GLfloat VertAttribs[VERT_ATTRIB_MAX][4];
64
65   GLfloat Temporaries[MAX_PROGRAM_TEMPS][4];
66   GLfloat Outputs[MAX_PROGRAM_OUTPUTS][4];
67   GLfloat (*EnvParams)[4]; /**< Vertex or Fragment env parameters */
68   GLint AddressReg[MAX_PROGRAM_ADDRESS_REGS][4];
69   GLfloat SystemValues[SYSTEM_VALUE_MAX][4];
70
71   const GLubyte *Samplers;  /** Array mapping sampler var to tex unit */
72
73   GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */
74   GLuint StackDepth; /**< Index/ptr to top of CallStack[] */
75
76   /** Texture fetch functions */
77   FetchTexelLodFunc FetchTexelLod;
78   FetchTexelDerivFunc FetchTexelDeriv;
79};
80
81
82extern GLboolean
83_mesa_execute_program(struct gl_context *ctx,
84                      const struct gl_program *program,
85                      struct gl_program_machine *machine);
86
87
88#endif /* PROG_EXECUTE_H */
89