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
|
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2018 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#ifndef SFML_WGLCONTEXT_HPP
#define SFML_WGLCONTEXT_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Window/GlContext.hpp>
#include <SFML/Window/Win32/WglExtensions.hpp>
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
/// \brief Windows (WGL) implementation of OpenGL contexts
///
////////////////////////////////////////////////////////////
class WglContext : public GlContext
{
public:
////////////////////////////////////////////////////////////
/// \brief Create a new default context
///
/// \param shared Context to share the new one with (can be NULL)
///
////////////////////////////////////////////////////////////
WglContext(WglContext* shared);
////////////////////////////////////////////////////////////
/// \brief Create a new context attached to a window
///
/// \param shared Context to share the new one with
/// \param settings Creation parameters
/// \param owner Pointer to the owner window
/// \param bitsPerPixel Pixel depth, in bits per pixel
///
////////////////////////////////////////////////////////////
WglContext(WglContext* shared, const ContextSettings& settings, const WindowImpl* owner, unsigned int bitsPerPixel);
////////////////////////////////////////////////////////////
/// \brief Create a new context that embeds its own rendering target
///
/// \param shared Context to share the new one with
/// \param settings Creation parameters
/// \param width Back buffer width, in pixels
/// \param height Back buffer height, in pixels
///
////////////////////////////////////////////////////////////
WglContext(WglContext* shared, const ContextSettings& settings, unsigned int width, unsigned int height);
////////////////////////////////////////////////////////////
/// \brief Destructor
///
////////////////////////////////////////////////////////////
~WglContext();
////////////////////////////////////////////////////////////
/// \brief Get the address of an OpenGL function
///
/// \param name Name of the function to get the address of
///
/// \return Address of the OpenGL function, 0 on failure
///
////////////////////////////////////////////////////////////
static GlFunctionPointer getFunction(const char* name);
////////////////////////////////////////////////////////////
/// \brief Activate the context as the current target for rendering
///
/// \param current Whether to make the context current or no longer current
///
/// \return True on success, false if any error happened
///
////////////////////////////////////////////////////////////
virtual bool makeCurrent(bool current);
////////////////////////////////////////////////////////////
/// \brief Display what has been rendered to the context so far
///
////////////////////////////////////////////////////////////
virtual void display();
////////////////////////////////////////////////////////////
/// \brief Enable or disable vertical synchronization
///
/// Activating vertical synchronization will limit the number
/// of frames displayed to the refresh rate of the monitor.
/// This can avoid some visual artifacts, and limit the framerate
/// to a good value (but not constant across different computers).
///
/// \param enabled: True to enable v-sync, false to deactivate
///
////////////////////////////////////////////////////////////
virtual void setVerticalSyncEnabled(bool enabled);
////////////////////////////////////////////////////////////
/// \brief Select the best pixel format for a given set of settings
///
/// \param deviceContext Device context
/// \param bitsPerPixel Pixel depth, in bits per pixel
/// \param settings Requested context settings
/// \param pbuffer Whether the pixel format should support pbuffers
///
/// \return The best pixel format
///
////////////////////////////////////////////////////////////
static int selectBestPixelFormat(HDC deviceContext, unsigned int bitsPerPixel, const ContextSettings& settings, bool pbuffer = false);
private:
////////////////////////////////////////////////////////////
/// \brief Set the pixel format of the device context
///
/// \param bitsPerPixel Pixel depth, in bits per pixel
///
////////////////////////////////////////////////////////////
void setDevicePixelFormat(unsigned int bitsPerPixel);
////////////////////////////////////////////////////////////
/// \brief Update the context settings from the selected pixel format
///
////////////////////////////////////////////////////////////
void updateSettingsFromPixelFormat();
////////////////////////////////////////////////////////////
/// \brief Create the context's drawing surface
///
/// \param shared Shared context (can be NULL)
/// \param width Back buffer width, in pixels
/// \param height Back buffer height, in pixels
/// \param bitsPerPixel Pixel depth, in bits per pixel
///
////////////////////////////////////////////////////////////
void createSurface(WglContext* shared, unsigned int width, unsigned int height, unsigned int bitsPerPixel);
////////////////////////////////////////////////////////////
/// \brief Create the context's drawing surface from an existing window
///
/// \param window Window handle of the owning window
/// \param bitsPerPixel Pixel depth, in bits per pixel
///
////////////////////////////////////////////////////////////
void createSurface(HWND window, unsigned int bitsPerPixel);
////////////////////////////////////////////////////////////
/// \brief Create the context
///
/// \param shared Context to share the new one with (can be NULL)
///
////////////////////////////////////////////////////////////
void createContext(WglContext* shared);
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
HWND m_window; ///< Window to which the context is attached
HPBUFFERARB m_pbuffer; ///< Handle to a pbuffer if one was created
HDC m_deviceContext; ///< Device context associated to the context
HGLRC m_context; ///< OpenGL context
bool m_ownsWindow; ///< Do we own the target window?
};
} // namespace priv
} // namespace sf
#endif // SFML_WGLCONTEXT_HPP
|
