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_STATEVARS_H
26#define PROG_STATEVARS_H
27
28
29#include "main/glheader.h"
30#include "compiler/shader_enums.h"
31
32
33#ifdef __cplusplus
34extern "C" {
35#endif
36
37
38struct gl_context;
39struct gl_program_parameter_list;
40
41
42/**
43 * Used for describing GL state referenced from inside ARB vertex and
44 * fragment programs.
45 * A string such as "state.light[0].ambient" gets translated into a
46 * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].
47 *
48 * For state that's an array, like STATE_CLIPPLANE, the 2nd token [1] should
49 * always be the array index.
50 */
51typedef enum gl_state_index_ {
52   STATE_MATERIAL = 100,  /* start at 100 so small ints are seen as ints */
53
54   STATE_LIGHT,
55   STATE_LIGHTMODEL_AMBIENT,
56   STATE_LIGHTMODEL_SCENECOLOR,
57   STATE_LIGHTPROD,
58
59   STATE_TEXGEN,
60
61   STATE_FOG_COLOR,
62   STATE_FOG_PARAMS,
63
64   STATE_CLIPPLANE,
65
66   STATE_POINT_SIZE,
67   STATE_POINT_ATTENUATION,
68
69   STATE_MODELVIEW_MATRIX,
70   STATE_PROJECTION_MATRIX,
71   STATE_MVP_MATRIX,
72   STATE_TEXTURE_MATRIX,
73   STATE_PROGRAM_MATRIX,
74   STATE_MATRIX_INVERSE,
75   STATE_MATRIX_TRANSPOSE,
76   STATE_MATRIX_INVTRANS,
77
78   STATE_AMBIENT,
79   STATE_DIFFUSE,
80   STATE_SPECULAR,
81   STATE_EMISSION,
82   STATE_SHININESS,
83   STATE_HALF_VECTOR,
84
85   STATE_POSITION,       /**< xyzw = position */
86   STATE_ATTENUATION,    /**< xyz = attenuation, w = spot exponent */
87   STATE_SPOT_DIRECTION, /**< xyz = direction, w = cos(cutoff) */
88   STATE_SPOT_CUTOFF,    /**< x = cutoff, yzw = undefined */
89
90   STATE_TEXGEN_EYE_S,
91   STATE_TEXGEN_EYE_T,
92   STATE_TEXGEN_EYE_R,
93   STATE_TEXGEN_EYE_Q,
94   STATE_TEXGEN_OBJECT_S,
95   STATE_TEXGEN_OBJECT_T,
96   STATE_TEXGEN_OBJECT_R,
97   STATE_TEXGEN_OBJECT_Q,
98
99   STATE_TEXENV_COLOR,
100
101   STATE_NUM_SAMPLES,    /* An integer, not a float like the other state vars */
102
103   STATE_DEPTH_RANGE,
104
105   STATE_VERTEX_PROGRAM,
106   STATE_FRAGMENT_PROGRAM,
107
108   STATE_ENV,
109   STATE_LOCAL,
110
111   STATE_INTERNAL,		/* Mesa additions */
112   STATE_CURRENT_ATTRIB,        /* ctx->Current vertex attrib value */
113   STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED,        /* ctx->Current vertex attrib value after passthrough vertex processing */
114   STATE_NORMAL_SCALE,
115   STATE_FOG_PARAMS_OPTIMIZED,  /* for faster fog calc */
116   STATE_POINT_SIZE_CLAMPED,    /* includes implementation dependent size clamp */
117   STATE_LIGHT_SPOT_DIR_NORMALIZED,   /* pre-normalized spot dir */
118   STATE_LIGHT_POSITION,              /* object vs eye space */
119   STATE_LIGHT_POSITION_NORMALIZED,   /* object vs eye space */
120   STATE_LIGHT_HALF_VECTOR,           /* object vs eye space */
121   STATE_PT_SCALE,              /**< Pixel transfer RGBA scale */
122   STATE_PT_BIAS,               /**< Pixel transfer RGBA bias */
123   STATE_FB_SIZE,               /**< (width-1, height-1, 0, 0) */
124   STATE_FB_WPOS_Y_TRANSFORM,   /**< (1, 0, -1, height) if a FBO is bound, (-1, height, 1, 0) otherwise */
125   STATE_TCS_PATCH_VERTICES_IN, /**< gl_PatchVerticesIn for TCS (integer) */
126   STATE_TES_PATCH_VERTICES_IN, /**< gl_PatchVerticesIn for TES (integer) */
127   /**
128    * A single enum gl_blend_support_qualifier value representing the
129    * currently active advanced blending equation, or zero if disabled.
130    */
131   STATE_ADVANCED_BLENDING_MODE,
132   STATE_INTERNAL_DRIVER	/* first available state index for drivers (must be last) */
133} gl_state_index;
134
135
136extern void
137_mesa_load_state_parameters(struct gl_context *ctx,
138                            struct gl_program_parameter_list *paramList);
139
140
141extern GLbitfield
142_mesa_program_state_flags(const gl_state_index16 state[STATE_LENGTH]);
143
144
145extern char *
146_mesa_program_state_string(const gl_state_index16 state[STATE_LENGTH]);
147
148
149
150#ifdef __cplusplus
151}
152#endif
153
154#endif /* PROG_STATEVARS_H */
155