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 #include "compiler/shader_enums.h" 31 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 38 struct gl_context; 39 struct gl_program_parameter_list; 40 41 42 /** 43 * Used for describing GL state referenced from inside ARB vertex and 44 * fragment programs. 45 * A string such as "state.light[0].ambient" gets translated into a 46 * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ]. 47 * 48 * For state that's an array, like STATE_CLIPPLANE, the 2nd token [1] should 49 * always be the array index. 50 */ 51 typedef enum gl_state_index_ { 52 STATE_MATERIAL = 100, /* start at 100 so small ints are seen as ints */ 53 54 STATE_LIGHT, 55 STATE_LIGHTMODEL_AMBIENT, 56 STATE_LIGHTMODEL_SCENECOLOR, 57 STATE_LIGHTPROD, 58 59 STATE_TEXGEN, 60 61 STATE_FOG_COLOR, 62 STATE_FOG_PARAMS, 63 64 STATE_CLIPPLANE, 65 66 STATE_POINT_SIZE, 67 STATE_POINT_ATTENUATION, 68 69 STATE_MODELVIEW_MATRIX, 70 STATE_PROJECTION_MATRIX, 71 STATE_MVP_MATRIX, 72 STATE_TEXTURE_MATRIX, 73 STATE_PROGRAM_MATRIX, 74 STATE_MATRIX_INVERSE, 75 STATE_MATRIX_TRANSPOSE, 76 STATE_MATRIX_INVTRANS, 77 78 STATE_AMBIENT, 79 STATE_DIFFUSE, 80 STATE_SPECULAR, 81 STATE_EMISSION, 82 STATE_SHININESS, 83 STATE_HALF_VECTOR, 84 85 STATE_POSITION, /**< xyzw = position */ 86 STATE_ATTENUATION, /**< xyz = attenuation, w = spot exponent */ 87 STATE_SPOT_DIRECTION, /**< xyz = direction, w = cos(cutoff) */ 88 STATE_SPOT_CUTOFF, /**< x = cutoff, yzw = undefined */ 89 90 STATE_TEXGEN_EYE_S, 91 STATE_TEXGEN_EYE_T, 92 STATE_TEXGEN_EYE_R, 93 STATE_TEXGEN_EYE_Q, 94 STATE_TEXGEN_OBJECT_S, 95 STATE_TEXGEN_OBJECT_T, 96 STATE_TEXGEN_OBJECT_R, 97 STATE_TEXGEN_OBJECT_Q, 98 99 STATE_TEXENV_COLOR, 100 101 STATE_NUM_SAMPLES, /* An integer, not a float like the other state vars */ 102 103 STATE_DEPTH_RANGE, 104 105 STATE_VERTEX_PROGRAM, 106 STATE_FRAGMENT_PROGRAM, 107 108 STATE_ENV, 109 STATE_LOCAL, 110 111 STATE_INTERNAL, /* Mesa additions */ 112 STATE_CURRENT_ATTRIB, /* ctx->Current vertex attrib value */ 113 STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED, /* ctx->Current vertex attrib value after passthrough vertex processing */ 114 STATE_NORMAL_SCALE, 115 STATE_FOG_PARAMS_OPTIMIZED, /* for faster fog calc */ 116 STATE_POINT_SIZE_CLAMPED, /* includes implementation dependent size clamp */ 117 STATE_LIGHT_SPOT_DIR_NORMALIZED, /* pre-normalized spot dir */ 118 STATE_LIGHT_POSITION, /* object vs eye space */ 119 STATE_LIGHT_POSITION_NORMALIZED, /* object vs eye space */ 120 STATE_LIGHT_HALF_VECTOR, /* object vs eye space */ 121 STATE_PT_SCALE, /**< Pixel transfer RGBA scale */ 122 STATE_PT_BIAS, /**< Pixel transfer RGBA bias */ 123 STATE_FB_SIZE, /**< (width-1, height-1, 0, 0) */ 124 STATE_FB_WPOS_Y_TRANSFORM, /**< (1, 0, -1, height) if a FBO is bound, (-1, height, 1, 0) otherwise */ 125 STATE_FB_PNTC_Y_TRANSFORM, /**< (1, 0, 0, 0) if point origin is upper left, (-1, 1, 0, 0) otherwise */ 126 STATE_TCS_PATCH_VERTICES_IN, /**< gl_PatchVerticesIn for TCS (integer) */ 127 STATE_TES_PATCH_VERTICES_IN, /**< gl_PatchVerticesIn for TES (integer) */ 128 /** 129 * A single enum gl_blend_support_qualifier value representing the 130 * currently active advanced blending equation, or zero if disabled. 131 */ 132 STATE_ADVANCED_BLENDING_MODE, 133 STATE_ALPHA_REF, /* alpha-test reference value */ 134 STATE_CLIP_INTERNAL, /* similar to STATE_CLIPPLANE, but in clip-space */ 135 STATE_INTERNAL_DRIVER /* first available state index for drivers (must be last) */ 136 } gl_state_index; 137 138 139 extern void 140 _mesa_load_state_parameters(struct gl_context *ctx, 141 struct gl_program_parameter_list *paramList); 142 143 extern unsigned 144 _mesa_program_state_value_size(const gl_state_index16 state[STATE_LENGTH]); 145 146 extern GLbitfield 147 _mesa_program_state_flags(const gl_state_index16 state[STATE_LENGTH]); 148 149 150 extern char * 151 _mesa_program_state_string(const gl_state_index16 state[STATE_LENGTH]); 152 153 154 155 #ifdef __cplusplus 156 } 157 #endif 158 159 #endif /* PROG_STATEVARS_H */ 160