xref: /third_party/mesa3d/src/mesa/program/program.h (revision bf215546) 
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 "prog_parameter.h"
44
45
46#ifdef __cplusplus
47extern "C" {
48#endif
49
50extern struct gl_program _mesa_DummyProgram;
51
52
53extern void
54_mesa_init_program(struct gl_context *ctx);
55
56extern void
57_mesa_free_program_data(struct gl_context *ctx);
58
59extern void
60_mesa_update_default_objects_program(struct gl_context *ctx);
61
62extern void
63_mesa_set_program_error(struct gl_context *ctx, GLint pos, const char *string);
64
65extern struct gl_program *
66_mesa_init_gl_program(struct gl_program *prog, gl_shader_stage stage,
67                      GLuint id, bool is_arb_asm);
68
69extern struct gl_program *
70_mesa_new_program(struct gl_context *ctx, gl_shader_stage stage, GLuint id,
71                  bool is_arb_asm);
72
73extern void
74_mesa_delete_program(struct gl_context *ctx, struct gl_program *prog);
75
76extern struct gl_program *
77_mesa_lookup_program(struct gl_context *ctx, GLuint id);
78
79extern void
80_mesa_reference_program_(struct gl_context *ctx,
81                         struct gl_program **ptr,
82                         struct gl_program *prog);
83
84static 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
93extern GLint
94_mesa_get_min_invocations_per_fragment(struct gl_context *ctx,
95                                       const struct gl_program *prog);
96
97static inline GLuint
98_mesa_program_enum_to_shader_stage(GLenum v)
99{
100   switch (v) {
101   case GL_VERTEX_PROGRAM_ARB:
102      return MESA_SHADER_VERTEX;
103   case GL_FRAGMENT_PROGRAM_ARB:
104      return MESA_SHADER_FRAGMENT;
105   case GL_FRAGMENT_SHADER_ATI:
106      return MESA_SHADER_FRAGMENT;
107   case GL_GEOMETRY_PROGRAM_NV:
108      return MESA_SHADER_GEOMETRY;
109   case GL_TESS_CONTROL_PROGRAM_NV:
110      return MESA_SHADER_TESS_CTRL;
111   case GL_TESS_EVALUATION_PROGRAM_NV:
112      return MESA_SHADER_TESS_EVAL;
113   case GL_COMPUTE_PROGRAM_NV:
114      return MESA_SHADER_COMPUTE;
115   default:
116      assert(0);
117      return ~0;
118   }
119}
120
121
122static inline GLenum
123_mesa_shader_stage_to_program(unsigned stage)
124{
125   switch (stage) {
126   case MESA_SHADER_VERTEX:
127      return GL_VERTEX_PROGRAM_ARB;
128   case MESA_SHADER_FRAGMENT:
129      return GL_FRAGMENT_PROGRAM_ARB;
130   case MESA_SHADER_GEOMETRY:
131      return GL_GEOMETRY_PROGRAM_NV;
132   case MESA_SHADER_TESS_CTRL:
133      return GL_TESS_CONTROL_PROGRAM_NV;
134   case MESA_SHADER_TESS_EVAL:
135      return GL_TESS_EVALUATION_PROGRAM_NV;
136   case MESA_SHADER_COMPUTE:
137      return GL_COMPUTE_PROGRAM_NV;
138   }
139
140   assert(!"Unexpected shader stage in _mesa_shader_stage_to_program");
141   return GL_VERTEX_PROGRAM_ARB;
142}
143
144
145GLbitfield
146gl_external_samplers(const struct gl_program *prog);
147
148void
149_mesa_add_separate_state_parameters(struct gl_program *prog,
150                                    struct gl_program_parameter_list *state_params);
151
152#ifdef __cplusplus
153} /* extern "C" */
154#endif
155
156#endif /* PROGRAM_H */
157