1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/* $Id: context.h,v 1.3 1999/11/19 22:26:53 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.3
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef CONTEXT_H
#define CONTEXT_H
#include "types.h"
/*
* There are three Mesa datatypes which are meant to be used by device
* drivers:
* GLcontext: this contains the Mesa rendering state
* GLvisual: this describes the color buffer (rgb vs. ci), whether
* or not there's a depth buffer, stencil buffer, etc.
* GLframebuffer: contains pointers to the depth buffer, stencil
* buffer, accum buffer and alpha buffers.
*
* These types should be encapsulated by corresponding device driver
* datatypes. See xmesa.h and xmesaP.h for an example.
*
* In OOP terms, GLcontext, GLvisual, and GLframebuffer are base classes
* which the device driver must derive from.
*
* The following functions create and destroy these datatypes.
*/
/*
* Create/destroy a GLvisual. A GLvisual is like a GLX visual. It describes
* the colorbuffer, depth buffer, stencil buffer and accum buffer which will
* be used by the GL context and framebuffer.
*/
extern GLvisual *gl_create_visual( GLboolean rgbFlag,
GLboolean alphaFlag,
GLboolean dbFlag,
GLboolean stereoFlag,
GLint depthBits,
GLint stencilBits,
GLint accumBits,
GLint indexBits,
GLint redBits,
GLint greenBits,
GLint blueBits,
GLint alphaBits );
extern void gl_destroy_visual( GLvisual *vis );
/*
* Create/destroy a GLcontext. A GLcontext is like a GLX context. It
* contains the rendering state.
*/
extern GLcontext *gl_create_context( GLvisual *visual,
GLcontext *share_list,
void *driver_ctx,
GLboolean direct);
extern void gl_destroy_context( GLcontext *ctx );
/* Called by the driver after both the context and driver are fully
* initialized. Currently just reads the config file.
*/
extern void gl_context_initialize( GLcontext *ctx );
extern void gl_copy_context(const GLcontext *src, GLcontext *dst, GLuint mask);
/*
* Create/destroy a GLframebuffer. A GLframebuffer is like a GLX drawable.
* It bundles up the depth buffer, stencil buffer and accum buffers into a
* single entity.
*/
extern GLframebuffer *gl_create_framebuffer( GLvisual *visual );
extern void gl_destroy_framebuffer( GLframebuffer *buffer );
extern void gl_make_current( GLcontext *ctx, GLframebuffer *buffer );
extern GLcontext *gl_get_current_context(void);
#ifdef THREADS
/*
* A seperate GLcontext for each thread
*/
#define GET_CURRENT_CONTEXT(C) GLcontext *C = gl_get_current_context()
#define GET_IMMEDIATE struct immediate *IM = (gl_get_current_context())->input;
#define SET_IMMEDIATE(ctx, im) \
do { \
ctx->input = im; \
} while (0)
#else
/*
* All threads use same pointer to current context.
*/
extern GLcontext *_mesa_current_context;
extern struct immediate *CURRENT_INPUT;
#define GET_CURRENT_CONTEXT(C) GLcontext *C = _mesa_current_context
#define GET_IMMEDIATE struct immediate *IM = CURRENT_INPUT
#define SET_IMMEDIATE(ctx, im) \
do { \
ctx->input = im; \
CURRENT_INPUT = im; \
} while (0)
#endif
extern void
_mesa_swapbuffers(GLcontext *ctx);
extern struct _glapi_table *
_mesa_get_dispatch(GLcontext *ctx);
/*
* GL_MESA_resize_buffers extension
*/
extern void _mesa_ResizeBuffersMESA( void );
/*
* Miscellaneous
*/
extern void gl_problem( const GLcontext *ctx, const char *s );
extern void gl_warning( const GLcontext *ctx, const char *s );
extern void gl_error( GLcontext *ctx, GLenum error, const char *s );
extern void gl_compile_error( GLcontext *ctx, GLenum error, const char *s );
extern void gl_update_state( GLcontext *ctx );
/* for debugging */
extern void gl_print_state( const char *msg, GLuint state );
/* for debugging */
extern void gl_print_enable_flags( const char *msg, GLuint flags );
#ifdef PROFILE
extern GLdouble gl_time( void );
#endif
#endif
|
