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 struct gl_program *
  67 _mesa_init_gl_program(struct gl_program *prog, GLenum target, GLuint id);
  68
  69 extern struct gl_program *
  70 _mesa_new_program(struct gl_context *ctx, GLenum target, GLuint id);
  71
  72 extern void
  73 _mesa_delete_program(struct gl_context *ctx, struct gl_program *prog);
  74
  75 extern struct gl_program *
  76 _mesa_lookup_program(struct gl_context *ctx, GLuint id);
  77
  78 extern void
  79 _mesa_reference_program_(struct gl_context *ctx,
  80                          struct gl_program **ptr,
  81                          struct gl_program *prog);
  82
  83 static inline void
  84 _mesa_reference_program(struct gl_context *ctx,
  85                         struct gl_program **ptr,
  86                         struct gl_program *prog)
  87 {
  88    if (*ptr != prog)
  89       _mesa_reference_program_(ctx, ptr, prog);
  90 }
  91
  92 static inline void
  93 _mesa_reference_fragprog(struct gl_context *ctx,
  94                          struct gl_fragment_program **ptr,
  95                          struct gl_fragment_program *prog)
  96 {
  97    _mesa_reference_program(ctx, (struct gl_program **) ptr,
  98                            (struct gl_program *) prog);
  99 }
 100
 101 extern  GLboolean
 102 _mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count);
 103
 104 extern  GLboolean
 105 _mesa_delete_instructions(struct gl_program *prog, GLuint start, GLuint count);
 106
 107 extern void
 108 _mesa_find_used_registers(const struct gl_program *prog,
 109                           gl_register_file file,
 110                           GLboolean used[], GLuint usedSize);
 111
 112 extern GLint
 113 _mesa_find_free_register(const GLboolean used[],
 114                          GLuint maxRegs, GLuint firstReg);
 115
 116 extern GLint
 117 _mesa_get_min_invocations_per_fragment(struct gl_context *ctx,
 118                                        const struct gl_fragment_program *prog,
 119                                        bool ignore_sample_qualifier);
 120
 121 static inline GLuint
 122 _mesa_program_enum_to_shader_stage(GLenum v)
 123 {
 124    switch (v) {
 125    case GL_VERTEX_PROGRAM_ARB:
 126       return MESA_SHADER_VERTEX;
 127    case GL_FRAGMENT_PROGRAM_ARB:
 128       return MESA_SHADER_FRAGMENT;
 129    case GL_FRAGMENT_SHADER_ATI:
 130       return MESA_SHADER_FRAGMENT;
 131    case GL_GEOMETRY_PROGRAM_NV:
 132       return MESA_SHADER_GEOMETRY;
 133    case GL_TESS_CONTROL_PROGRAM_NV:
 134       return MESA_SHADER_TESS_CTRL;
 135    case GL_TESS_EVALUATION_PROGRAM_NV:
 136       return MESA_SHADER_TESS_EVAL;
 137    case GL_COMPUTE_PROGRAM_NV:
 138       return MESA_SHADER_COMPUTE;
 139    default:
 140       assert(0);
 141       return ~0;
 142    }
 143 }
 144
 145
 146 static inline GLenum
 147 _mesa_shader_stage_to_program(unsigned stage)
 148 {
 149    switch (stage) {
 150    case MESA_SHADER_VERTEX:
 151       return GL_VERTEX_PROGRAM_ARB;
 152    case MESA_SHADER_FRAGMENT:
 153       return GL_FRAGMENT_PROGRAM_ARB;
 154    case MESA_SHADER_GEOMETRY:
 155       return GL_GEOMETRY_PROGRAM_NV;
 156    case MESA_SHADER_TESS_CTRL:
 157       return GL_TESS_CONTROL_PROGRAM_NV;
 158    case MESA_SHADER_TESS_EVAL:
 159       return GL_TESS_EVALUATION_PROGRAM_NV;
 160    case MESA_SHADER_COMPUTE:
 161       return GL_COMPUTE_PROGRAM_NV;
 162    }
 163
 164    assert(!"Unexpected shader stage in _mesa_shader_stage_to_program");
 165    return GL_VERTEX_PROGRAM_ARB;
 166 }
 167
 168
 169 static inline struct gl_fragment_program *
 170 gl_fragment_program(struct gl_program *prog)
 171 {
 172    return (struct gl_fragment_program *) prog;
 173 }
 174
 175 static inline const struct gl_fragment_program *
 176 gl_fragment_program_const(const struct gl_program *prog)
 177 {
 178    return (const struct gl_fragment_program *) prog;
 179 }
 180
 181 #ifdef __cplusplus
 182 } /* extern "C" */
 183 #endif
 184
 185 #endif /* PROGRAM_H */