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