src/mesa/shader/program.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 1999-2005  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 /**
  26  * \file program.c
  27  * Vertex and fragment program support functions.
  28  * \author Brian Paul
  29  */
  30
  31
  32 /**
  33  * \mainpage Mesa vertex and fragment program module
  34  *
  35  * This module or directory contains most of the code for vertex and
  36  * fragment programs and shaders, including state management, parsers,
  37  * and (some) software routines for executing programs
  38  */
  39
  40 #ifndef PROGRAM_H
  41 #define PROGRAM_H
  42
  43 #include "mtypes.h"
  44
  45
  46 /* for GL_ARB_v_p and GL_ARB_f_p SWZ instruction */
  47 #define SWIZZLE_X    0
  48 #define SWIZZLE_Y    1
  49 #define SWIZZLE_Z    2
  50 #define SWIZZLE_W    3
  51 #define SWIZZLE_ZERO 4          /* keep these values together: KW */
  52 #define SWIZZLE_ONE  5          /* keep these values together: KW */
  53
  54 #define MAKE_SWIZZLE4(a,b,c,d) (((a)<<0) | ((b)<<3) | ((c)<<6) | ((d)<<9))
  55 #define SWIZZLE_NOOP           MAKE_SWIZZLE4(0,1,2,3)
  56 #define GET_SWZ(swz, idx)      (((swz) >> ((idx)*3)) & 0x7)
  57 #define GET_BIT(msk, idx)      (((msk) >> (idx)) & 0x1)
  58
  59
  60 #define WRITEMASK_X     0x1
  61 #define WRITEMASK_Y     0x2
  62 #define WRITEMASK_XY    0x3
  63 #define WRITEMASK_Z     0x4
  64 #define WRITEMASK_XZ    0x5
  65 #define WRITEMASK_YZ    0x6
  66 #define WRITEMASK_XYZ   0x7
  67 #define WRITEMASK_W     0x8
  68 #define WRITEMASK_XW    0x9
  69 #define WRITEMASK_YW    0xa
  70 #define WRITEMASK_XYW   0xb
  71 #define WRITEMASK_ZW    0xc
  72 #define WRITEMASK_XZW   0xd
  73 #define WRITEMASK_YZW   0xe
  74 #define WRITEMASK_XYZW  0xf
  75
  76
  77 extern struct program _mesa_DummyProgram;
  78
  79
  80 /*
  81  * Internal functions
  82  */
  83
  84 extern void
  85 _mesa_init_program(GLcontext *ctx);
  86
  87 extern void
  88 _mesa_free_program_data(GLcontext *ctx);
  89
  90 extern void
  91 _mesa_set_program_error(GLcontext *ctx, GLint pos, const char *string);
  92
  93 extern const GLubyte *
  94 _mesa_find_line_column(const GLubyte *string, const GLubyte *pos,
  95                        GLint *line, GLint *col);
  96
  97
  98 extern struct program *
  99 _mesa_init_vertex_program(GLcontext *ctx,
 100                           struct vertex_program *prog,
 101                           GLenum target, GLuint id);
 102
 103 extern struct program *
 104 _mesa_init_fragment_program(GLcontext *ctx,
 105                             struct fragment_program *prog,
 106                             GLenum target, GLuint id);
 107
 108 extern struct program *
 109 _mesa_init_ati_fragment_shader(GLcontext *ctx,
 110                                struct ati_fragment_shader *prog,
 111                                GLenum target, GLuint id );
 112
 113 extern struct program *
 114 _mesa_new_program(GLcontext *ctx, GLenum target, GLuint id);
 115
 116 extern void
 117 _mesa_delete_program(GLcontext *ctx, struct program *prog);
 118
 119
 120
 121 /**
 122  * Used for describing GL state referenced from inside ARB vertex and
 123  * fragment programs.
 124  * A string such as "state.light[0].ambient" gets translated into a
 125  * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].
 126  */
 127 enum state_index {
 128    STATE_MATERIAL,
 129
 130    STATE_LIGHT,
 131    STATE_LIGHTMODEL_AMBIENT,
 132    STATE_LIGHTMODEL_SCENECOLOR,
 133    STATE_LIGHTPROD,
 134
 135    STATE_TEXGEN,
 136
 137    STATE_FOG_COLOR,
 138    STATE_FOG_PARAMS,
 139
 140    STATE_CLIPPLANE,
 141
 142    STATE_POINT_SIZE,
 143    STATE_POINT_ATTENUATION,
 144
 145    STATE_MATRIX,
 146    STATE_MODELVIEW,
 147    STATE_PROJECTION,
 148    STATE_MVP,
 149    STATE_TEXTURE,
 150    STATE_PROGRAM,
 151    STATE_MATRIX_INVERSE,
 152    STATE_MATRIX_TRANSPOSE,
 153    STATE_MATRIX_INVTRANS,
 154
 155    STATE_AMBIENT,
 156    STATE_DIFFUSE,
 157    STATE_SPECULAR,
 158    STATE_EMISSION,
 159    STATE_SHININESS,
 160    STATE_HALF,
 161
 162    STATE_POSITION,
 163    STATE_ATTENUATION,
 164    STATE_SPOT_DIRECTION,
 165
 166    STATE_TEXGEN_EYE_S,
 167    STATE_TEXGEN_EYE_T,
 168    STATE_TEXGEN_EYE_R,
 169    STATE_TEXGEN_EYE_Q,
 170    STATE_TEXGEN_OBJECT_S,
 171    STATE_TEXGEN_OBJECT_T,
 172    STATE_TEXGEN_OBJECT_R,
 173    STATE_TEXGEN_OBJECT_Q,
 174
 175    STATE_TEXENV_COLOR,
 176
 177    STATE_DEPTH_RANGE,
 178
 179    STATE_VERTEX_PROGRAM,
 180    STATE_FRAGMENT_PROGRAM,
 181
 182    STATE_ENV,
 183    STATE_LOCAL,
 184
 185    STATE_INTERNAL,              /* Mesa additions */
 186    STATE_NORMAL_SCALE,
 187    STATE_POSITION_NORMALIZED    /* normalized light position */
 188 };
 189
 190
 191
 192 /**
 193  * Named program parameters
 194  * Used for NV_fragment_program "DEFINE"d constants and "DECLARE"d parameters,
 195  * and ARB_fragment_program global state references.  For the later, Name
 196  * might be "state.light[0].diffuse", for example.
 197  */
 198 struct program_parameter
 199 {
 200    const char *Name;                   /* Null-terminated */
 201    enum register_file Type; /** PROGRAM_NAMED_PARAM, CONSTANT or STATE_VAR */
 202    enum state_index StateIndexes[6];   /* Global state reference */
 203 };
 204
 205
 206 struct program_parameter_list
 207 {
 208    GLuint Size;           /** allocated size of Parameters, ParameterValues */
 209    GLuint NumParameters;  /** number of parameters in arrays */
 210    struct program_parameter *Parameters; /** Array [Size] */
 211    GLfloat (*ParameterValues)[4];        /** Array [Size] */
 212 };
 213
 214
 215 /*
 216  * Program parameter functions
 217  */
 218
 219 extern struct program_parameter_list *
 220 _mesa_new_parameter_list(void);
 221
 222 extern void
 223 _mesa_free_parameter_list(struct program_parameter_list *paramList);
 224
 225 extern void
 226 _mesa_free_parameters(struct program_parameter_list *paramList);
 227
 228 extern GLint
 229 _mesa_add_named_parameter(struct program_parameter_list *paramList,
 230                           const char *name, const GLfloat values[4]);
 231
 232 extern GLint
 233 _mesa_add_named_constant(struct program_parameter_list *paramList,
 234                          const char *name, const GLfloat values[4]);
 235
 236 extern GLint
 237 _mesa_add_unnamed_constant(struct program_parameter_list *paramList,
 238                            const GLfloat values[4]);
 239
 240 extern GLint
 241 _mesa_add_state_reference(struct program_parameter_list *paramList,
 242                           const GLint *stateTokens);
 243
 244 extern GLfloat *
 245 _mesa_lookup_parameter_value(struct program_parameter_list *paramList,
 246                              GLsizei nameLen, const char *name);
 247
 248 extern GLint
 249 _mesa_lookup_parameter_index(struct program_parameter_list *paramList,
 250                              GLsizei nameLen, const char *name);
 251
 252 extern void
 253 _mesa_load_state_parameters(GLcontext *ctx,
 254                             struct program_parameter_list *paramList);
 255
 256
 257 /*
 258  * API functions common to ARB/NV_vertex/fragment_program
 259  */
 260
 261 extern void GLAPIENTRY
 262 _mesa_BindProgram(GLenum target, GLuint id);
 263
 264 extern void GLAPIENTRY
 265 _mesa_DeletePrograms(GLsizei n, const GLuint *ids);
 266
 267 extern void GLAPIENTRY
 268 _mesa_GenPrograms(GLsizei n, GLuint *ids);
 269
 270 extern GLboolean GLAPIENTRY
 271 _mesa_IsProgram(GLuint id);
 272
 273
 274
 275 /*
 276  * GL_MESA_program_debug
 277  */
 278
 279 extern void
 280 _mesa_ProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback,
 281                           GLvoid *data);
 282
 283 extern void
 284 _mesa_GetProgramRegisterfvMESA(GLenum target, GLsizei len,
 285                                const GLubyte *registerName, GLfloat *v);
 286
 287
 288 #endif /* PROGRAM_H */