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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.