src/mesa/program/prog_statevars.h

   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
  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_NUM_SAMPLES,    /* An integer, not a float like the other state vars */
 107
 108    STATE_DEPTH_RANGE,
 109
 110    STATE_VERTEX_PROGRAM,
 111    STATE_FRAGMENT_PROGRAM,
 112
 113    STATE_ENV,
 114    STATE_LOCAL,
 115
 116    STATE_INTERNAL,              /* Mesa additions */
 117    STATE_CURRENT_ATTRIB,        /* ctx->Current vertex attrib value */
 118    STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED,        /* ctx->Current vertex attrib value after passthrough vertex processing */
 119    STATE_NORMAL_SCALE,
 120    STATE_FOG_PARAMS_OPTIMIZED,  /* for faster fog calc */
 121    STATE_POINT_SIZE_CLAMPED,    /* includes implementation dependent size clamp */
 122    STATE_LIGHT_SPOT_DIR_NORMALIZED,   /* pre-normalized spot dir */
 123    STATE_LIGHT_POSITION,              /* object vs eye space */
 124    STATE_LIGHT_POSITION_NORMALIZED,   /* object vs eye space */
 125    STATE_LIGHT_HALF_VECTOR,           /* object vs eye space */
 126    STATE_PT_SCALE,              /**< Pixel transfer RGBA scale */
 127    STATE_PT_BIAS,               /**< Pixel transfer RGBA bias */
 128    STATE_FB_SIZE,               /**< (width-1, height-1, 0, 0) */
 129    STATE_FB_WPOS_Y_TRANSFORM,   /**< (1, 0, -1, height) if a FBO is bound, (-1, height, 1, 0) otherwise */
 130    STATE_TCS_PATCH_VERTICES_IN, /**< gl_PatchVerticesIn for TCS (integer) */
 131    STATE_TES_PATCH_VERTICES_IN, /**< gl_PatchVerticesIn for TES (integer) */
 132    /**
 133     * A single enum gl_blend_support_qualifier value representing the
 134     * currently active advanced blending equation, or zero if disabled.
 135     */
 136    STATE_ADVANCED_BLENDING_MODE,
 137    STATE_INTERNAL_DRIVER        /* first available state index for drivers (must be last) */
 138 } gl_state_index;
 139
 140
 141
 142 extern void
 143 _mesa_load_state_parameters(struct gl_context *ctx,
 144                             struct gl_program_parameter_list *paramList);
 145
 146
 147 extern GLbitfield
 148 _mesa_program_state_flags(const gl_state_index state[STATE_LENGTH]);
 149
 150
 151 extern char *
 152 _mesa_program_state_string(const gl_state_index state[STATE_LENGTH]);
 153
 154
 155
 156 #ifdef __cplusplus
 157 }
 158 #endif
 159
 160 #endif /* PROG_STATEVARS_H */