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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/* $Id: context.h,v 1.28 2001/12/14 02:50:01 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 4.1
*
* Copyright (C) 1999-2001 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 "glapi.h"
#include "mtypes.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 *
_mesa_create_visual( GLboolean rgbFlag,
GLboolean dbFlag,
GLboolean stereoFlag,
GLint redBits,
GLint greenBits,
GLint blueBits,
GLint alphaBits,
GLint indexBits,
GLint depthBits,
GLint stencilBits,
GLint accumRedBits,
GLint accumGreenBits,
GLint accumBlueBits,
GLint accumAlphaBits,
GLint numSamples );
extern GLboolean
_mesa_initialize_visual( GLvisual *v,
GLboolean rgbFlag,
GLboolean dbFlag,
GLboolean stereoFlag,
GLint redBits,
GLint greenBits,
GLint blueBits,
GLint alphaBits,
GLint indexBits,
GLint depthBits,
GLint stencilBits,
GLint accumRedBits,
GLint accumGreenBits,
GLint accumBlueBits,
GLint accumAlphaBits,
GLint numSamples );
extern void
_mesa_destroy_visual( GLvisual *vis );
/*
* 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 *
_mesa_create_framebuffer( const GLvisual *visual,
GLboolean softwareDepth,
GLboolean softwareStencil,
GLboolean softwareAccum,
GLboolean softwareAlpha );
extern void
_mesa_initialize_framebuffer( GLframebuffer *fb,
const GLvisual *visual,
GLboolean softwareDepth,
GLboolean softwareStencil,
GLboolean softwareAccum,
GLboolean softwareAlpha );
extern void
_mesa_free_framebuffer_data( GLframebuffer *buffer );
extern void
_mesa_destroy_framebuffer( GLframebuffer *buffer );
/*
* Create/destroy a GLcontext. A GLcontext is like a GLX context. It
* contains the rendering state.
*/
extern GLcontext *
_mesa_create_context( const GLvisual *visual,
GLcontext *share_list,
void *driver_ctx,
GLboolean direct);
extern GLboolean
_mesa_initialize_context( GLcontext *ctx,
const GLvisual *visual,
GLcontext *share_list,
void *driver_ctx,
GLboolean direct );
extern void
_mesa_free_context_data( GLcontext *ctx );
extern void
_mesa_destroy_context( GLcontext *ctx );
extern void
_mesa_copy_context(const GLcontext *src, GLcontext *dst, GLuint mask);
extern void
_mesa_make_current( GLcontext *ctx, GLframebuffer *buffer );
extern void
_mesa_make_current2( GLcontext *ctx, GLframebuffer *drawBuffer,
GLframebuffer *readBuffer );
extern GLcontext *
_mesa_get_current_context(void);
/*
* Macros for fetching current context.
*/
#ifdef THREADS
#define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) (_glapi_Context ? _glapi_Context : _glapi_get_context())
#else
#define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) _glapi_Context
#endif
extern void
_mesa_swapbuffers(GLcontext *ctx);
extern struct _glapi_table *
_mesa_get_dispatch(GLcontext *ctx);
/*
* Miscellaneous
*/
extern void
_mesa_problem( const GLcontext *ctx, const char *s );
extern void
_mesa_warning( const GLcontext *ctx, const char *s );
extern void
_mesa_error( GLcontext *ctx, GLenum error, const char *s );
extern void
_mesa_Finish( void );
extern void
_mesa_Flush( void );
extern void
_mesa_read_config_file(GLcontext *ctx);
extern void
_mesa_register_config_var(const char *name,
void (*notify)( const char *, int ));
#endif
|
