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/*
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 * Mesa 3-D graphics library
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 *
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 * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included
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 * in all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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 * OTHER DEALINGS IN THE SOFTWARE.
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 */
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#ifndef PROG_STATEVARS_H
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#define PROG_STATEVARS_H
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#include "main/glheader.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct gl_context;
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struct gl_program_parameter_list;
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/**
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 * Number of STATE_* values we need to address any GL state.
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 * Used to dimension arrays.
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 */
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#define STATE_LENGTH 5
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/**
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 * Used for describing GL state referenced from inside ARB vertex and
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 * fragment programs.
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 * A string such as "state.light[0].ambient" gets translated into a
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 * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].
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 *
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 * For state that's an array, like STATE_CLIPPLANE, the 2nd token [1] should
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 * always be the array index.
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 */
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typedef enum gl_state_index_ {
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   STATE_MATERIAL = 100,  /* start at 100 so small ints are seen as ints */
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   STATE_LIGHT,
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   STATE_LIGHTMODEL_AMBIENT,
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   STATE_LIGHTMODEL_SCENECOLOR,
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   STATE_LIGHTPROD,
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   STATE_TEXGEN,
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   STATE_FOG_COLOR,
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   STATE_FOG_PARAMS,
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   STATE_CLIPPLANE,
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   STATE_POINT_SIZE,
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   STATE_POINT_ATTENUATION,
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   STATE_MODELVIEW_MATRIX,
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   STATE_PROJECTION_MATRIX,
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   STATE_MVP_MATRIX,
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   STATE_TEXTURE_MATRIX,
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   STATE_PROGRAM_MATRIX,
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   STATE_MATRIX_INVERSE,
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   STATE_MATRIX_TRANSPOSE,
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   STATE_MATRIX_INVTRANS,
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   STATE_AMBIENT,
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   STATE_DIFFUSE,
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   STATE_SPECULAR,
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   STATE_EMISSION,
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   STATE_SHININESS,
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   STATE_HALF_VECTOR,
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   STATE_POSITION,       /**< xyzw = position */
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   STATE_ATTENUATION,    /**< xyz = attenuation, w = spot exponent */
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   STATE_SPOT_DIRECTION, /**< xyz = direction, w = cos(cutoff) */
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   STATE_SPOT_CUTOFF,    /**< x = cutoff, yzw = undefined */
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   STATE_TEXGEN_EYE_S,
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   STATE_TEXGEN_EYE_T,
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   STATE_TEXGEN_EYE_R,
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   STATE_TEXGEN_EYE_Q,
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   STATE_TEXGEN_OBJECT_S,
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   STATE_TEXGEN_OBJECT_T,
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   STATE_TEXGEN_OBJECT_R,
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   STATE_TEXGEN_OBJECT_Q,
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   STATE_TEXENV_COLOR,
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   STATE_NUM_SAMPLES,    /* An integer, not a float like the other state vars */
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   STATE_DEPTH_RANGE,
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   STATE_VERTEX_PROGRAM,
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   STATE_FRAGMENT_PROGRAM,
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   STATE_ENV,
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   STATE_LOCAL,
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   STATE_INTERNAL,		/* Mesa additions */
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   STATE_CURRENT_ATTRIB,        /* ctx->Current vertex attrib value */
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   STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED,        /* ctx->Current vertex attrib value after passthrough vertex processing */
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   STATE_NORMAL_SCALE,
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   STATE_TEXRECT_SCALE,
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   STATE_FOG_PARAMS_OPTIMIZED,  /* for faster fog calc */
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   STATE_POINT_SIZE_CLAMPED,    /* includes implementation dependent size clamp */
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   STATE_LIGHT_SPOT_DIR_NORMALIZED,   /* pre-normalized spot dir */
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   STATE_LIGHT_POSITION,              /* object vs eye space */
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   STATE_LIGHT_POSITION_NORMALIZED,   /* object vs eye space */
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   STATE_LIGHT_HALF_VECTOR,           /* object vs eye space */
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   STATE_PT_SCALE,              /**< Pixel transfer RGBA scale */
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   STATE_PT_BIAS,               /**< Pixel transfer RGBA bias */
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   STATE_FB_SIZE,               /**< (width-1, height-1, 0, 0) */
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   STATE_FB_WPOS_Y_TRANSFORM,   /**< (1, 0, -1, height) if a FBO is bound, (-1, height, 1, 0) otherwise */
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   STATE_INTERNAL_DRIVER	/* first available state index for drivers (must be last) */
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} gl_state_index;
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extern void
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_mesa_load_state_parameters(struct gl_context *ctx,
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                            struct gl_program_parameter_list *paramList);
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extern GLbitfield
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_mesa_program_state_flags(const gl_state_index state[STATE_LENGTH]);
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extern char *
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_mesa_program_state_string(const gl_state_index state[STATE_LENGTH]);
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#ifdef __cplusplus
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}
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#endif
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#endif /* PROG_STATEVARS_H */