src/mesa/program/program.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 /**
  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 "main/compiler.h"
  44 #include "main/mtypes.h"
  45
  46
  47 #ifdef __cplusplus
  48 extern "C" {
  49 #endif
  50
  51 extern struct gl_program _mesa_DummyProgram;
  52
  53
  54 extern void
  55 _mesa_init_program(struct gl_context *ctx);
  56
  57 extern void
  58 _mesa_free_program_data(struct gl_context *ctx);
  59
  60 extern void
  61 _mesa_update_default_objects_program(struct gl_context *ctx);
  62
  63 extern void
  64 _mesa_set_program_error(struct gl_context *ctx, GLint pos, const char *string);
  65
  66 extern const GLubyte *
  67 _mesa_find_line_column(const GLubyte *string, const GLubyte *pos,
  68                        GLint *line, GLint *col);
  69
  70
  71 extern struct gl_program *
  72 _mesa_init_vertex_program(struct gl_context *ctx,
  73                           struct gl_vertex_program *prog,
  74                           GLenum target, GLuint id);
  75
  76 extern struct gl_program *
  77 _mesa_init_fragment_program(struct gl_context *ctx,
  78                             struct gl_fragment_program *prog,
  79                             GLenum target, GLuint id);
  80
  81 extern struct gl_program *
  82 _mesa_init_geometry_program(struct gl_context *ctx,
  83                             struct gl_geometry_program *prog,
  84                             GLenum target, GLuint id);
  85
  86 extern struct gl_program *
  87 _mesa_init_compute_program(struct gl_context *ctx,
  88                            struct gl_compute_program *prog,
  89                            GLenum target, GLuint id);
  90
  91 extern struct gl_program *
  92 _mesa_new_program(struct gl_context *ctx, GLenum target, GLuint id);
  93
  94 extern void
  95 _mesa_delete_program(struct gl_context *ctx, struct gl_program *prog);
  96
  97 extern struct gl_program *
  98 _mesa_lookup_program(struct gl_context *ctx, GLuint id);
  99
 100 extern void
 101 _mesa_reference_program_(struct gl_context *ctx,
 102                          struct gl_program **ptr,
 103                          struct gl_program *prog);
 104
 105 static inline void
 106 _mesa_reference_program(struct gl_context *ctx,
 107                         struct gl_program **ptr,
 108                         struct gl_program *prog)
 109 {
 110    if (*ptr != prog)
 111       _mesa_reference_program_(ctx, ptr, prog);
 112 }
 113
 114 static inline void
 115 _mesa_reference_vertprog(struct gl_context *ctx,
 116                          struct gl_vertex_program **ptr,
 117                          struct gl_vertex_program *prog)
 118 {
 119    _mesa_reference_program(ctx, (struct gl_program **) ptr,
 120                            (struct gl_program *) prog);
 121 }
 122
 123 static inline void
 124 _mesa_reference_fragprog(struct gl_context *ctx,
 125                          struct gl_fragment_program **ptr,
 126                          struct gl_fragment_program *prog)
 127 {
 128    _mesa_reference_program(ctx, (struct gl_program **) ptr,
 129                            (struct gl_program *) prog);
 130 }
 131
 132 static inline void
 133 _mesa_reference_geomprog(struct gl_context *ctx,
 134                          struct gl_geometry_program **ptr,
 135                          struct gl_geometry_program *prog)
 136 {
 137    _mesa_reference_program(ctx, (struct gl_program **) ptr,
 138                            (struct gl_program *) prog);
 139 }
 140
 141 extern struct gl_program *
 142 _mesa_clone_program(struct gl_context *ctx, const struct gl_program *prog);
 143
 144 static inline struct gl_vertex_program *
 145 _mesa_clone_vertex_program(struct gl_context *ctx,
 146                            const struct gl_vertex_program *prog)
 147 {
 148    return (struct gl_vertex_program *) _mesa_clone_program(ctx, &prog->Base);
 149 }
 150
 151 static inline struct gl_geometry_program *
 152 _mesa_clone_geometry_program(struct gl_context *ctx,
 153                              const struct gl_geometry_program *prog)
 154 {
 155    return (struct gl_geometry_program *) _mesa_clone_program(ctx, &prog->Base);
 156 }
 157
 158 static inline struct gl_fragment_program *
 159 _mesa_clone_fragment_program(struct gl_context *ctx,
 160                              const struct gl_fragment_program *prog)
 161 {
 162    return (struct gl_fragment_program *) _mesa_clone_program(ctx, &prog->Base);
 163 }
 164
 165
 166 extern  GLboolean
 167 _mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count);
 168
 169 extern  GLboolean
 170 _mesa_delete_instructions(struct gl_program *prog, GLuint start, GLuint count);
 171
 172 extern struct gl_program *
 173 _mesa_combine_programs(struct gl_context *ctx,
 174                        const struct gl_program *progA,
 175                        const struct gl_program *progB);
 176
 177 extern void
 178 _mesa_find_used_registers(const struct gl_program *prog,
 179                           gl_register_file file,
 180                           GLboolean used[], GLuint usedSize);
 181
 182 extern GLint
 183 _mesa_find_free_register(const GLboolean used[],
 184                          GLuint maxRegs, GLuint firstReg);
 185
 186
 187 extern GLboolean
 188 _mesa_valid_register_index(const struct gl_context *ctx,
 189                            gl_shader_stage shaderType,
 190                            gl_register_file file, GLint index);
 191
 192 extern void
 193 _mesa_postprocess_program(struct gl_context *ctx, struct gl_program *prog);
 194
 195 extern GLint
 196 _mesa_get_min_invocations_per_fragment(struct gl_context *ctx,
 197                                        const struct gl_fragment_program *prog,
 198                                        bool ignore_sample_qualifier);
 199
 200 static inline GLuint
 201 _mesa_program_enum_to_shader_stage(GLenum v)
 202 {
 203    switch (v) {
 204    case GL_VERTEX_PROGRAM_ARB:
 205       return MESA_SHADER_VERTEX;
 206    case GL_FRAGMENT_PROGRAM_ARB:
 207       return MESA_SHADER_FRAGMENT;
 208    case GL_GEOMETRY_PROGRAM_NV:
 209       return MESA_SHADER_GEOMETRY;
 210    case GL_COMPUTE_PROGRAM_NV:
 211       return MESA_SHADER_COMPUTE;
 212    default:
 213       ASSERT(0);
 214       return ~0;
 215    }
 216 }
 217
 218
 219 static inline GLenum
 220 _mesa_shader_stage_to_program(unsigned stage)
 221 {
 222    switch (stage) {
 223    case MESA_SHADER_VERTEX:
 224       return GL_VERTEX_PROGRAM_ARB;
 225    case MESA_SHADER_FRAGMENT:
 226       return GL_FRAGMENT_PROGRAM_ARB;
 227    case MESA_SHADER_GEOMETRY:
 228       return GL_GEOMETRY_PROGRAM_NV;
 229    case MESA_SHADER_COMPUTE:
 230       return GL_COMPUTE_PROGRAM_NV;
 231    }
 232
 233    assert(!"Unexpected shader stage in _mesa_shader_stage_to_program");
 234    return GL_VERTEX_PROGRAM_ARB;
 235 }
 236
 237
 238 /* Cast wrappers from gl_program to gl_vertex/geometry/fragment_program */
 239
 240 static inline struct gl_fragment_program *
 241 gl_fragment_program(struct gl_program *prog)
 242 {
 243    return (struct gl_fragment_program *) prog;
 244 }
 245
 246 static inline const struct gl_fragment_program *
 247 gl_fragment_program_const(const struct gl_program *prog)
 248 {
 249    return (const struct gl_fragment_program *) prog;
 250 }
 251
 252
 253 static inline struct gl_vertex_program *
 254 gl_vertex_program(struct gl_program *prog)
 255 {
 256    return (struct gl_vertex_program *) prog;
 257 }
 258
 259 static inline const struct gl_vertex_program *
 260 gl_vertex_program_const(const struct gl_program *prog)
 261 {
 262    return (const struct gl_vertex_program *) prog;
 263 }
 264
 265
 266 static inline struct gl_geometry_program *
 267 gl_geometry_program(struct gl_program *prog)
 268 {
 269    return (struct gl_geometry_program *) prog;
 270 }
 271
 272 static inline const struct gl_geometry_program *
 273 gl_geometry_program_const(const struct gl_program *prog)
 274 {
 275    return (const struct gl_geometry_program *) prog;
 276 }
 277
 278
 279 #ifdef __cplusplus
 280 } /* extern "C" */
 281 #endif
 282
 283 #endif /* PROGRAM_H */