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
|
/*
* 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 "EGLContext.h"
#if USE(EGL)
#include <wtf/text/WTFString.h>
namespace WebCore {
static const EGLint contextAttributes[] = {
#if USE(OPENGL_ES_2)
EGL_CONTEXT_CLIENT_VERSION, 2,
#endif
EGL_NONE
};
static const EGLint contextRobustnessAttributes[] = {
#if USE(OPENGL_ES_2)
EGL_CONTEXT_CLIENT_VERSION, 2,
#endif
EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT,
EGL_LOSE_CONTEXT_ON_RESET_EXT,
EGL_NONE
};
static bool isRobustnessExtSupported(EGLDisplay display)
{
static bool didQueryForRobustnessExtension = false;
static bool isRobustnessExtensionSupported = false;
if (!didQueryForRobustnessExtension) {
didQueryForRobustnessExtension = true;
isRobustnessExtensionSupported = GLPlatformContext::supportsEGLExtension(display, "EGL_EXT_create_context_robustness");
}
return isRobustnessExtensionSupported;
}
EGLOffScreenContext::EGLOffScreenContext()
: GLPlatformContext()
, m_display(0)
{
}
bool EGLOffScreenContext::initialize(GLPlatformSurface* surface, PlatformContext sharedContext)
{
if (!surface)
return false;
if (!eglBindAPI(eglAPIVersion)) {
LOG_ERROR("Failed to set EGL API(%d).", eglGetError());
return false;
}
m_display = surface->sharedDisplay();
if (!m_display)
return false;
EGLConfig config = surface->configuration();
if (!config)
return false;
if (isRobustnessExtSupported(m_display))
m_contextHandle = eglCreateContext(m_display, config, sharedContext, contextRobustnessAttributes);
if (m_contextHandle != EGL_NO_CONTEXT) {
// The EGL_EXT_create_context_robustness spec requires that a context created with
// EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT bit set must also support GL_EXT_robustness or
// a version of OpenGL incorporating equivalent functionality.
// The spec also defines similar requirements for attribute EGL_LOSE_CONTEXT_ON_RESET_EXT.
if (platformMakeCurrent(surface) && (GLPlatformContext::supportsGLExtension("GL_EXT_robustness")))
m_resetLostContext = true;
else
eglDestroyContext(m_display, m_contextHandle);
}
if (m_contextHandle == EGL_NO_CONTEXT)
m_contextHandle = eglCreateContext(m_display, config, sharedContext, contextAttributes);
if (m_contextHandle != EGL_NO_CONTEXT)
return true;
return false;
}
EGLOffScreenContext::~EGLOffScreenContext()
{
}
bool EGLOffScreenContext::isCurrentContext() const
{
return m_contextHandle == eglGetCurrentContext();
}
bool EGLOffScreenContext::platformMakeCurrent(GLPlatformSurface* surface)
{
if (!eglMakeCurrent(m_display, surface->drawable(), surface->drawable(), m_contextHandle)) {
LOG_ERROR("Failed to make context current(%d).", eglGetError());
if (m_resetLostContext && eglGetError() == EGL_CONTEXT_LOST) {
LOG_ERROR("Lost current context.");
m_contextLost = true;
}
return false;
}
return true;
}
void EGLOffScreenContext::platformReleaseCurrent()
{
eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
}
void EGLOffScreenContext::freeResources()
{
if (m_contextHandle == EGL_NO_CONTEXT)
return;
eglDestroyContext(m_display, m_contextHandle);
m_contextHandle = EGL_NO_CONTEXT;
m_display = 0;
}
void EGLOffScreenContext::destroy()
{
GLPlatformContext::destroy();
freeResources();
}
}
#endif
|
