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
|
/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 STW_FRAMEBUFFER_H
#define STW_FRAMEBUFFER_H
#include <windows.h>
#include "main/mtypes.h"
#include "os/os_thread.h"
struct pipe_surface;
struct stw_pixelformat_info;
/**
* Windows framebuffer, derived from gl_framebuffer.
*/
struct stw_framebuffer
{
/**
* This mutex has two purposes:
* - protect the access to the mutable data members below
* - prevent the the framebuffer from being deleted while being accessed.
*
* It is OK to lock this mutex while holding the stw_device::fb_mutex lock,
* but the opposite must never happen.
*/
pipe_mutex mutex;
/*
* Immutable members.
*
* Note that even access to immutable members implies acquiring the mutex
* above, to prevent the framebuffer from being destroyed.
*/
HDC hDC;
HWND hWnd;
int iPixelFormat;
const struct stw_pixelformat_info *pfi;
GLvisual visual;
/*
* Mutable members.
*/
struct st_framebuffer *stfb;
/* FIXME: Make this work for multiple contexts bound to the same framebuffer */
boolean must_resize;
unsigned width;
unsigned height;
/**
* Client area rectangle, relative to the window upper-left corner.
*
* @sa GLCBPRESENTBUFFERSDATA::rect.
*/
RECT client_rect;
HANDLE hSharedSurface;
struct stw_shared_surface *shared_surface;
/**
* This is protected by stw_device::fb_mutex, not the mutex above.
*
* Deletions must be done by first acquiring stw_device::fb_mutex, and then
* acquiring the stw_framebuffer::mutex of the framebuffer to be deleted.
* This ensures that nobody else is reading/writing to the.
*
* It is not necessary to aquire the mutex above to navigate the linked list
* given that deletions are done with stw_device::fb_mutex held, so no other
* thread can delete.
*/
struct stw_framebuffer *next;
};
/**
* Create a new framebuffer object which will correspond to the given HDC.
*
* This function will acquire stw_framebuffer::mutex. stw_framebuffer_release
* must be called when done
*/
struct stw_framebuffer *
stw_framebuffer_create(
HDC hdc,
int iPixelFormat );
/**
* Search a framebuffer with a matching HWND.
*
* This function will acquire stw_framebuffer::mutex. stw_framebuffer_release
* must be called when done
*/
struct stw_framebuffer *
stw_framebuffer_from_hwnd(
HWND hwnd );
/**
* Search a framebuffer with a matching HDC.
*
* This function will acquire stw_framebuffer::mutex. stw_framebuffer_release
* must be called when done
*/
struct stw_framebuffer *
stw_framebuffer_from_hdc(
HDC hdc );
BOOL
stw_framebuffer_allocate(
struct stw_framebuffer *fb );
BOOL
stw_framebuffer_present_locked(HDC hdc,
struct stw_framebuffer *fb,
struct pipe_surface *surface);
void
stw_framebuffer_update(
struct stw_framebuffer *fb);
/**
* Release stw_framebuffer::mutex lock. This framebuffer must not be accessed
* after calling this function, as it may have been deleted by another thread
* in the meanwhile.
*/
void
stw_framebuffer_release(
struct stw_framebuffer *fb);
/**
* Cleanup any existing framebuffers when exiting application.
*/
void
stw_framebuffer_cleanup(void);
#endif /* STW_FRAMEBUFFER_H */
|
