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/mtypes.h"
  44
  45
  46 #ifdef __cplusplus
  47 extern "C" {
  48 #endif
  49
  50 extern struct gl_program _mesa_DummyProgram;
  51
  52
  53 extern void
  54 _mesa_init_program(struct gl_context *ctx);
  55
  56 extern void
  57 _mesa_free_program_data(struct gl_context *ctx);
  58
  59 extern void
  60 _mesa_update_default_objects_program(struct gl_context *ctx);
  61
  62 extern void
  63 _mesa_set_program_error(struct gl_context *ctx, GLint pos, const char *string);
  64
  65 extern struct gl_program *
  66 _mesa_init_gl_program(struct gl_program *prog, GLenum target, GLuint id,
  67                       bool is_arb_asm);
  68
  69 extern struct gl_program *
  70 _mesa_new_program(struct gl_context *ctx, GLenum target, GLuint id,
  71                   bool is_arb_asm);
  72
  73 extern void
  74 _mesa_delete_program(struct gl_context *ctx, struct gl_program *prog);
  75
  76 extern struct gl_program *
  77 _mesa_lookup_program(struct gl_context *ctx, GLuint id);
  78
  79 extern void
  80 _mesa_reference_program_(struct gl_context *ctx,
  81                          struct gl_program **ptr,
  82                          struct gl_program *prog);
  83
  84 static inline void
  85 _mesa_reference_program(struct gl_context *ctx,
  86                         struct gl_program **ptr,
  87                         struct gl_program *prog)
  88 {
  89    if (*ptr != prog)
  90       _mesa_reference_program_(ctx, ptr, prog);
  91 }
  92
  93 extern  GLboolean
  94 _mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count);
  95
  96 extern  GLboolean
  97 _mesa_delete_instructions(struct gl_program *prog, GLuint start, GLuint count,
  98                           void *mem_ctx);
  99
 100 extern void
 101 _mesa_find_used_registers(const struct gl_program *prog,
 102                           gl_register_file file,
 103                           GLboolean used[], GLuint usedSize);
 104
 105 extern GLint
 106 _mesa_find_free_register(const GLboolean used[],
 107                          GLuint maxRegs, GLuint firstReg);
 108
 109 extern GLint
 110 _mesa_get_min_invocations_per_fragment(struct gl_context *ctx,
 111                                        const struct gl_program *prog);
 112
 113 static inline GLuint
 114 _mesa_program_enum_to_shader_stage(GLenum v)
 115 {
 116    switch (v) {
 117    case GL_VERTEX_PROGRAM_ARB:
 118       return MESA_SHADER_VERTEX;
 119    case GL_FRAGMENT_PROGRAM_ARB:
 120       return MESA_SHADER_FRAGMENT;
 121    case GL_FRAGMENT_SHADER_ATI:
 122       return MESA_SHADER_FRAGMENT;
 123    case GL_GEOMETRY_PROGRAM_NV:
 124       return MESA_SHADER_GEOMETRY;
 125    case GL_TESS_CONTROL_PROGRAM_NV:
 126       return MESA_SHADER_TESS_CTRL;
 127    case GL_TESS_EVALUATION_PROGRAM_NV:
 128       return MESA_SHADER_TESS_EVAL;
 129    case GL_COMPUTE_PROGRAM_NV:
 130       return MESA_SHADER_COMPUTE;
 131    default:
 132       assert(0);
 133       return ~0;
 134    }
 135 }
 136
 137
 138 static inline GLenum
 139 _mesa_shader_stage_to_program(unsigned stage)
 140 {
 141    switch (stage) {
 142    case MESA_SHADER_VERTEX:
 143       return GL_VERTEX_PROGRAM_ARB;
 144    case MESA_SHADER_FRAGMENT:
 145       return GL_FRAGMENT_PROGRAM_ARB;
 146    case MESA_SHADER_GEOMETRY:
 147       return GL_GEOMETRY_PROGRAM_NV;
 148    case MESA_SHADER_TESS_CTRL:
 149       return GL_TESS_CONTROL_PROGRAM_NV;
 150    case MESA_SHADER_TESS_EVAL:
 151       return GL_TESS_EVALUATION_PROGRAM_NV;
 152    case MESA_SHADER_COMPUTE:
 153       return GL_COMPUTE_PROGRAM_NV;
 154    }
 155
 156    assert(!"Unexpected shader stage in _mesa_shader_stage_to_program");
 157    return GL_VERTEX_PROGRAM_ARB;
 158 }
 159
 160
 161 GLbitfield
 162 gl_external_samplers(const struct gl_program *prog);
 163
 164
 165 #ifdef __cplusplus
 166 } /* extern "C" */
 167 #endif
 168
 169 #endif /* PROGRAM_H */