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
|
/*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "GLXContext.h"
#if USE(ACCELERATED_COMPOSITING) && USE(GLX)
#include "X11Helper.h"
namespace WebCore {
typedef GLXContext (*GLXCREATECONTEXTATTRIBSARBPROC)(Display*, GLXFBConfig, GLXContext, Bool, const int*);
static GLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = 0;
static int Attribs[] = {
GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
GLX_LOSE_CONTEXT_ON_RESET_ARB,
0 };
static void initializeARBExtensions()
{
static bool initialized = false;
if (initialized)
return;
initialized = true;
if (GLPlatformContext::supportsGLXExtension(X11Helper::nativeDisplay(), "GLX_ARB_create_context_robustness"))
glXCreateContextAttribsARB = reinterpret_cast<GLXCREATECONTEXTATTRIBSARBPROC>(glXGetProcAddress(reinterpret_cast<const GLubyte*>("glXCreateContextAttribsARB")));
}
GLXOffScreenContext::GLXOffScreenContext()
: GLPlatformContext()
{
}
bool GLXOffScreenContext::initialize(GLPlatformSurface* surface, PlatformContext sharedContext)
{
if (!surface)
return false;
Display* x11Display = surface->sharedDisplay();
if (!x11Display)
return false;
GLXFBConfig config = surface->configuration();
if (config) {
initializeARBExtensions();
if (glXCreateContextAttribsARB)
m_contextHandle = glXCreateContextAttribsARB(x11Display, config, sharedContext, true, Attribs);
if (m_contextHandle) {
// The GLX_ARB_create_context_robustness spec requires that a context created with
// GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB bit set must also support GL_ARB_robustness or
// a version of OpenGL incorporating equivalent functionality.
// The spec also defines similar requirements for attribute GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB.
if (platformMakeCurrent(surface) && GLPlatformContext::supportsGLExtension("GL_ARB_robustness"))
m_resetLostContext = true;
else
glXDestroyContext(x11Display, m_contextHandle);
}
bool supportsAlpha = surface->attributes() & GLPlatformSurface::SupportAlpha;
if (!m_contextHandle)
m_contextHandle = glXCreateNewContext(x11Display, config, supportsAlpha ? GLX_RGBA_TYPE : 0, sharedContext, true);
if (m_contextHandle)
return true;
}
return false;
}
GLXOffScreenContext::~GLXOffScreenContext()
{
}
bool GLXOffScreenContext::isCurrentContext() const
{
return m_contextHandle == glXGetCurrentContext();
}
bool GLXOffScreenContext::platformMakeCurrent(GLPlatformSurface* surface)
{
return glXMakeCurrent(surface->sharedDisplay(), surface->drawable(), m_contextHandle);
}
void GLXOffScreenContext::platformReleaseCurrent()
{
Display* x11Display = X11Helper::nativeDisplay();
if (!x11Display)
return;
glXMakeCurrent(x11Display, 0, 0);
}
void GLXOffScreenContext::freeResources()
{
Display* x11Display = X11Helper::nativeDisplay();
if (!x11Display)
return;
if (m_contextHandle)
glXDestroyContext(x11Display, m_contextHandle);
m_contextHandle = 0;
}
void GLXOffScreenContext::destroy()
{
freeResources();
GLPlatformContext::destroy();
}
}
#endif
|
