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
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, gl_shader_stage stage,
67 GLuint id, bool is_arb_asm);
68
69 extern struct gl_program *
70 _mesa_new_program(struct gl_context *ctx, gl_shader_stage stage, 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
_mesa_reference_program(struct gl_context * ctx,struct gl_program ** ptr,struct gl_program * prog)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
_mesa_program_enum_to_shader_stage(GLenum v)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
_mesa_shader_stage_to_program(unsigned stage)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 void
165 _mesa_add_separate_state_parameters(struct gl_program *prog,
166 struct gl_program_parameter_list *state_params);
167
168 #ifdef __cplusplus
169 } /* extern "C" */
170 #endif
171
172 #endif /* PROGRAM_H */
173