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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 
     29 #include "main/glheader.h"
     30 
     31 
     32 #ifdef __cplusplus
     33 extern "C" {
     34 #endif
     35 
     36 
     37 struct gl_context;
     38 struct gl_program_parameter_list;
     39 
     40 /**
     41  * Number of STATE_* values we need to address any GL state.
     42  * Used to dimension arrays.
     43  */
     44 #define STATE_LENGTH 5
     45 
     46 
     47 /**
     48  * Used for describing GL state referenced from inside ARB vertex and
     49  * fragment programs.
     50  * A string such as "state.light[0].ambient" gets translated into a
     51  * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].
     52  *
     53  * For state that's an array, like STATE_CLIPPLANE, the 2nd token [1] should
     54  * always be the array index.
     55  */
     56 typedef enum gl_state_index_ {
     57    STATE_MATERIAL = 100,  /* start at 100 so small ints are seen as ints */
     58 
     59    STATE_LIGHT,
     60    STATE_LIGHTMODEL_AMBIENT,
     61    STATE_LIGHTMODEL_SCENECOLOR,
     62    STATE_LIGHTPROD,
     63 
     64    STATE_TEXGEN,
     65 
     66    STATE_FOG_COLOR,
     67    STATE_FOG_PARAMS,
     68 
     69    STATE_CLIPPLANE,
     70 
     71    STATE_POINT_SIZE,
     72    STATE_POINT_ATTENUATION,
     73 
     74    STATE_MODELVIEW_MATRIX,
     75    STATE_PROJECTION_MATRIX,
     76    STATE_MVP_MATRIX,
     77    STATE_TEXTURE_MATRIX,
     78    STATE_PROGRAM_MATRIX,
     79    STATE_MATRIX_INVERSE,
     80    STATE_MATRIX_TRANSPOSE,
     81    STATE_MATRIX_INVTRANS,
     82 
     83    STATE_AMBIENT,
     84    STATE_DIFFUSE,
     85    STATE_SPECULAR,
     86    STATE_EMISSION,
     87    STATE_SHININESS,
     88    STATE_HALF_VECTOR,
     89 
     90    STATE_POSITION,       /**< xyzw = position */
     91    STATE_ATTENUATION,    /**< xyz = attenuation, w = spot exponent */
     92    STATE_SPOT_DIRECTION, /**< xyz = direction, w = cos(cutoff) */
     93    STATE_SPOT_CUTOFF,    /**< x = cutoff, yzw = undefined */
     94 
     95    STATE_TEXGEN_EYE_S,
     96    STATE_TEXGEN_EYE_T,
     97    STATE_TEXGEN_EYE_R,
     98    STATE_TEXGEN_EYE_Q,
     99    STATE_TEXGEN_OBJECT_S,
    100    STATE_TEXGEN_OBJECT_T,
    101    STATE_TEXGEN_OBJECT_R,
    102    STATE_TEXGEN_OBJECT_Q,
    103 
    104    STATE_TEXENV_COLOR,
    105 
    106    STATE_DEPTH_RANGE,
    107 
    108    STATE_VERTEX_PROGRAM,
    109    STATE_FRAGMENT_PROGRAM,
    110 
    111    STATE_ENV,
    112    STATE_LOCAL,
    113 
    114    STATE_INTERNAL,		/* Mesa additions */
    115    STATE_CURRENT_ATTRIB,        /* ctx->Current vertex attrib value */
    116    STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED,        /* ctx->Current vertex attrib value after passthrough vertex processing */
    117    STATE_NORMAL_SCALE,
    118    STATE_TEXRECT_SCALE,
    119    STATE_FOG_PARAMS_OPTIMIZED,  /* for faster fog calc */
    120    STATE_POINT_SIZE_CLAMPED,    /* includes implementation dependent size clamp */
    121    STATE_LIGHT_SPOT_DIR_NORMALIZED,   /* pre-normalized spot dir */
    122    STATE_LIGHT_POSITION,              /* object vs eye space */
    123    STATE_LIGHT_POSITION_NORMALIZED,   /* object vs eye space */
    124    STATE_LIGHT_HALF_VECTOR,           /* object vs eye space */
    125    STATE_PT_SCALE,              /**< Pixel transfer RGBA scale */
    126    STATE_PT_BIAS,               /**< Pixel transfer RGBA bias */
    127    STATE_FB_SIZE,               /**< (width-1, height-1, 0, 0) */
    128    STATE_FB_WPOS_Y_TRANSFORM,   /**< (1, 0, -1, height) if a FBO is bound, (-1, height, 1, 0) otherwise */
    129    STATE_ROT_MATRIX_0,          /**< ATI_envmap_bumpmap, rot matrix row 0 */
    130    STATE_ROT_MATRIX_1,          /**< ATI_envmap_bumpmap, rot matrix row 1 */
    131    STATE_INTERNAL_DRIVER	/* first available state index for drivers (must be last) */
    132 } gl_state_index;
    133 
    134 
    135 
    136 extern void
    137 _mesa_load_state_parameters(struct gl_context *ctx,
    138                             struct gl_program_parameter_list *paramList);
    139 
    140 
    141 extern GLbitfield
    142 _mesa_program_state_flags(const gl_state_index state[STATE_LENGTH]);
    143 
    144 
    145 extern char *
    146 _mesa_program_state_string(const gl_state_index state[STATE_LENGTH]);
    147 
    148 
    149 extern void
    150 _mesa_load_tracked_matrices(struct gl_context *ctx);
    151 
    152 
    153 #ifdef __cplusplus
    154 }
    155 #endif
    156 
    157 #endif /* PROG_STATEVARS_H */
    158