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
|
/*
* Copyright (C) 2018 Metrological Group B.V.
* Copyright (C) 2018, 2019 Igalia S.L.
* Copyright (C) 2009-2020 Apple Inc.
* Copyright (C) 2020 Sony Interactive Entertainment Inc.
*
* 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* HOLDER OR 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 "ANGLEContext.h"
#if USE(TEXTURE_MAPPER) && USE(ANGLE) && !USE(NICOSIA)
#include "ANGLEHeaders.h"
#include "Logging.h"
#include <wtf/Vector.h>
namespace WebCore {
const char* ANGLEContext::errorString(int statusCode)
{
static_assert(sizeof(int) >= sizeof(EGLint), "EGLint must not be wider than int");
switch (statusCode) {
#define CASE_RETURN_STRING(name) case name: return #name
// https://www.khronos.org/registry/EGL/sdk/docs/man/html/eglGetError.xhtml
CASE_RETURN_STRING(EGL_SUCCESS);
CASE_RETURN_STRING(EGL_NOT_INITIALIZED);
CASE_RETURN_STRING(EGL_BAD_ACCESS);
CASE_RETURN_STRING(EGL_BAD_ALLOC);
CASE_RETURN_STRING(EGL_BAD_ATTRIBUTE);
CASE_RETURN_STRING(EGL_BAD_CONTEXT);
CASE_RETURN_STRING(EGL_BAD_CONFIG);
CASE_RETURN_STRING(EGL_BAD_CURRENT_SURFACE);
CASE_RETURN_STRING(EGL_BAD_DISPLAY);
CASE_RETURN_STRING(EGL_BAD_SURFACE);
CASE_RETURN_STRING(EGL_BAD_MATCH);
CASE_RETURN_STRING(EGL_BAD_PARAMETER);
CASE_RETURN_STRING(EGL_BAD_NATIVE_PIXMAP);
CASE_RETURN_STRING(EGL_BAD_NATIVE_WINDOW);
CASE_RETURN_STRING(EGL_CONTEXT_LOST);
#undef CASE_RETURN_STRING
default: return "Unknown EGL error";
}
}
const char* ANGLEContext::lastErrorString()
{
return errorString(EGL_GetError());
}
std::unique_ptr<ANGLEContext> ANGLEContext::createContext(EGLContext sharingContext, bool isForWebGL2)
{
EGLDisplay display = EGL_GetDisplay(EGL_DEFAULT_DISPLAY);
if (display == EGL_NO_DISPLAY)
return nullptr;
EGLint majorVersion, minorVersion;
if (EGL_Initialize(display, &majorVersion, &minorVersion) == EGL_FALSE) {
LOG(WebGL, "EGLDisplay Initialization failed.");
return nullptr;
}
LOG(WebGL, "ANGLE initialised Major: %d Minor: %d", majorVersion, minorVersion);
const char* displayExtensions = EGL_QueryString(display, EGL_EXTENSIONS);
LOG(WebGL, "Extensions: %s", displayExtensions);
EGLConfig config;
EGLint configAttributes[] = {
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_NONE
};
EGLint numberConfigsReturned = 0;
EGL_ChooseConfig(display, configAttributes, &config, 1, &numberConfigsReturned);
if (numberConfigsReturned != 1) {
LOG(WebGL, "EGLConfig Initialization failed.");
return nullptr;
}
LOG(WebGL, "Got EGLConfig");
EGL_BindAPI(EGL_OPENGL_ES_API);
if (EGL_GetError() != EGL_SUCCESS) {
LOG(WebGL, "Unable to bind to OPENGL_ES_API");
return nullptr;
}
Vector<EGLint> contextAttributes;
if (isForWebGL2) {
contextAttributes.append(EGL_CONTEXT_CLIENT_VERSION);
contextAttributes.append(3);
} else {
contextAttributes.append(EGL_CONTEXT_CLIENT_VERSION);
contextAttributes.append(2);
// ANGLE will upgrade the context to ES3 automatically unless this is specified.
contextAttributes.append(EGL_CONTEXT_OPENGL_BACKWARDS_COMPATIBLE_ANGLE);
contextAttributes.append(EGL_FALSE);
}
contextAttributes.append(EGL_CONTEXT_WEBGL_COMPATIBILITY_ANGLE);
contextAttributes.append(EGL_TRUE);
// WebGL requires that all resources are cleared at creation.
contextAttributes.append(EGL_ROBUST_RESOURCE_INITIALIZATION_ANGLE);
contextAttributes.append(EGL_TRUE);
// WebGL doesn't allow client arrays.
contextAttributes.append(EGL_CONTEXT_CLIENT_ARRAYS_ENABLED_ANGLE);
contextAttributes.append(EGL_FALSE);
// WebGL doesn't allow implicit creation of objects on bind.
contextAttributes.append(EGL_CONTEXT_BIND_GENERATES_RESOURCE_CHROMIUM);
contextAttributes.append(EGL_FALSE);
if (strstr(displayExtensions, "EGL_ANGLE_power_preference")) {
contextAttributes.append(EGL_POWER_PREFERENCE_ANGLE);
// EGL_LOW_POWER_ANGLE is the default. Change to
// EGL_HIGH_POWER_ANGLE if desired.
contextAttributes.append(EGL_LOW_POWER_ANGLE);
}
contextAttributes.append(EGL_NONE);
EGLContext context = EGL_CreateContext(display, config, sharingContext, contextAttributes.data());
if (context == EGL_NO_CONTEXT) {
LOG(WebGL, "EGLContext Initialization failed.");
return nullptr;
}
LOG(WebGL, "Got EGLContext");
return std::unique_ptr<ANGLEContext>(new ANGLEContext(display, config, context, EGL_NO_SURFACE));
}
ANGLEContext::ANGLEContext(EGLDisplay display, EGLConfig config, EGLContext context, EGLSurface surface)
: m_display(display)
, m_config(config)
, m_context(context)
, m_surface(surface)
{
}
ANGLEContext::~ANGLEContext()
{
if (m_context) {
GL_BindFramebuffer(GL_FRAMEBUFFER, 0);
EGL_MakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
EGL_DestroyContext(m_display, m_context);
}
if (m_surface)
EGL_DestroySurface(m_display, m_surface);
}
bool ANGLEContext::makeContextCurrent()
{
ASSERT(m_context);
if (EGL_GetCurrentContext() != m_context)
return EGL_MakeCurrent(m_display, m_surface, m_surface, m_context);
return true;
}
EGLContext ANGLEContext::platformContext() const
{
return m_context;
}
EGLDisplay ANGLEContext::platformDisplay() const
{
return m_display;
}
EGLConfig ANGLEContext::platformConfig() const
{
return m_config;
}
} // namespace WebCore
#endif
|
