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      1 /*
      2  * Mesa 3-D graphics library
      3  * Version:  7.1
      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_STATEVARS_H
     26 #define PROG_STATEVARS_H
     27 
     28 #include "main/mtypes.h"
     29 
     30 
     31 /**
     32  * Number of STATE_* values we need to address any GL state.
     33  * Used to dimension arrays.
     34  */
     35 #define STATE_LENGTH 5
     36 
     37 
     38 /**
     39  * Used for describing GL state referenced from inside ARB vertex and
     40  * fragment programs.
     41  * A string such as "state.light[0].ambient" gets translated into a
     42  * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].
     43  *
     44  * For state that's an array, like STATE_CLIPPLANE, the 2nd token [1] should
     45  * always be the array index.
     46  */
     47 typedef enum gl_state_index_ {
     48    STATE_MATERIAL = 100,  /* start at 100 so small ints are seen as ints */
     49 
     50    STATE_LIGHT,
     51    STATE_LIGHTMODEL_AMBIENT,
     52    STATE_LIGHTMODEL_SCENECOLOR,
     53    STATE_LIGHTPROD,
     54 
     55    STATE_TEXGEN,
     56 
     57    STATE_FOG_COLOR,
     58    STATE_FOG_PARAMS,
     59 
     60    STATE_CLIPPLANE,
     61 
     62    STATE_POINT_SIZE,
     63    STATE_POINT_ATTENUATION,
     64 
     65    STATE_MODELVIEW_MATRIX,
     66    STATE_PROJECTION_MATRIX,
     67    STATE_MVP_MATRIX,
     68    STATE_TEXTURE_MATRIX,
     69    STATE_PROGRAM_MATRIX,
     70    STATE_MATRIX_INVERSE,
     71    STATE_MATRIX_TRANSPOSE,
     72    STATE_MATRIX_INVTRANS,
     73 
     74    STATE_AMBIENT,
     75    STATE_DIFFUSE,
     76    STATE_SPECULAR,
     77    STATE_EMISSION,
     78    STATE_SHININESS,
     79    STATE_HALF_VECTOR,
     80 
     81    STATE_POSITION,       /**< xyzw = position */
     82    STATE_ATTENUATION,    /**< xyz = attenuation, w = spot exponent */
     83    STATE_SPOT_DIRECTION, /**< xyz = direction, w = cos(cutoff) */
     84    STATE_SPOT_CUTOFF,    /**< x = cutoff, yzw = undefined */
     85 
     86    STATE_TEXGEN_EYE_S,
     87    STATE_TEXGEN_EYE_T,
     88    STATE_TEXGEN_EYE_R,
     89    STATE_TEXGEN_EYE_Q,
     90    STATE_TEXGEN_OBJECT_S,
     91    STATE_TEXGEN_OBJECT_T,
     92    STATE_TEXGEN_OBJECT_R,
     93    STATE_TEXGEN_OBJECT_Q,
     94 
     95    STATE_TEXENV_COLOR,
     96 
     97    STATE_DEPTH_RANGE,
     98 
     99    STATE_VERTEX_PROGRAM,
    100    STATE_FRAGMENT_PROGRAM,
    101 
    102    STATE_ENV,
    103    STATE_LOCAL,
    104 
    105    STATE_INTERNAL,		/* Mesa additions */
    106    STATE_CURRENT_ATTRIB,        /* ctx->Current vertex attrib value */
    107    STATE_NORMAL_SCALE,
    108    STATE_TEXRECT_SCALE,
    109    STATE_FOG_PARAMS_OPTIMIZED,  /* for faster fog calc */
    110    STATE_POINT_SIZE_CLAMPED,    /* includes implementation dependent size clamp */
    111    STATE_POINT_SIZE_IMPL_CLAMP, /* for implementation clamp only in vs */
    112    STATE_LIGHT_SPOT_DIR_NORMALIZED,   /* pre-normalized spot dir */
    113    STATE_LIGHT_POSITION,              /* object vs eye space */
    114    STATE_LIGHT_POSITION_NORMALIZED,   /* object vs eye space */
    115    STATE_LIGHT_HALF_VECTOR,           /* object vs eye space */
    116    STATE_PT_SCALE,              /**< Pixel transfer RGBA scale */
    117    STATE_PT_BIAS,               /**< Pixel transfer RGBA bias */
    118    STATE_SHADOW_AMBIENT,        /**< ARB_shadow_ambient fail value; token[2] is texture unit index */
    119    STATE_FB_SIZE,               /**< (width-1, height-1, 0, 0) */
    120    STATE_FB_WPOS_Y_TRANSFORM,   /**< (1, 0, -1, height-1) if a FBO is bound, (-1, height-1, 1, 0) otherwise */
    121    STATE_ROT_MATRIX_0,          /**< ATI_envmap_bumpmap, rot matrix row 0 */
    122    STATE_ROT_MATRIX_1,          /**< ATI_envmap_bumpmap, rot matrix row 1 */
    123    STATE_INTERNAL_DRIVER	/* first available state index for drivers (must be last) */
    124 } gl_state_index;
    125 
    126 
    127 
    128 extern void
    129 _mesa_load_state_parameters(struct gl_context *ctx,
    130                             struct gl_program_parameter_list *paramList);
    131 
    132 
    133 extern GLbitfield
    134 _mesa_program_state_flags(const gl_state_index state[STATE_LENGTH]);
    135 
    136 
    137 extern char *
    138 _mesa_program_state_string(const gl_state_index state[STATE_LENGTH]);
    139 
    140 
    141 extern void
    142 _mesa_load_tracked_matrices(struct gl_context *ctx);
    143 
    144 
    145 #endif /* PROG_STATEVARS_H */
    146