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
|
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gl/init/gl_initializer.h"
#include "base/apple/bundle_locations.h"
#include "base/apple/foundation_util.h"
#include "base/base_paths.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/native_library.h"
#include "base/path_service.h"
#include "base/threading/thread_restrictions.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_display.h"
#include "ui/gl/gl_egl_api_implementation.h"
#include "ui/gl/gl_gl_api_implementation.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_surface.h"
#include "ui/gl/gl_utils.h"
#include "ui/gl/gpu_switching_manager.h"
#include "ui/gl/init/gl_display_initializer.h"
#include "ui/gl/startup_trace.h"
namespace gl {
namespace init {
namespace {
#if !BUILDFLAG(USE_STATIC_ANGLE)
const char kGLESv2ANGLELibraryName[] = "libGLESv2.dylib";
const char kEGLANGLELibraryName[] = "libEGL.dylib";
bool InitializeStaticEGLInternalFromLibrary() {
// Some unit test targets depend on Angle/SwiftShader but aren't built
// as app bundles. In that case, the .dylib is next to the executable.
base::FilePath base_dir;
if (base::apple::AmIBundled()) {
base_dir = base::apple::FrameworkBundlePath().Append("Libraries");
} else {
if (!base::PathService::Get(base::FILE_EXE, &base_dir)) {
LOG(ERROR) << "PathService::Get failed.";
return false;
}
base_dir = base_dir.DirName();
}
base::FilePath glesv2_path = base_dir.Append(kGLESv2ANGLELibraryName);
base::NativeLibrary gles_library;
{
GPU_STARTUP_TRACE_EVENT("Load gles_library");
gles_library = LoadLibraryAndPrintError(glesv2_path);
}
if (!gles_library) {
return false;
}
base::FilePath egl_path = base_dir.Append(kEGLANGLELibraryName);
base::NativeLibrary egl_library;
{
GPU_STARTUP_TRACE_EVENT("Load egl_library");
egl_library = LoadLibraryAndPrintError(egl_path);
}
if (!egl_library) {
base::UnloadNativeLibrary(gles_library);
return false;
}
GLGetProcAddressProc get_proc_address =
reinterpret_cast<GLGetProcAddressProc>(
base::GetFunctionPointerFromNativeLibrary(egl_library,
"eglGetProcAddress"));
if (!get_proc_address) {
LOG(ERROR) << "eglGetProcAddress not found.";
base::UnloadNativeLibrary(egl_library);
base::UnloadNativeLibrary(gles_library);
return false;
}
SetGLGetProcAddressProc(get_proc_address);
// FIXME: SwiftShader must load symbols from libGLESv2 before libEGL on MacOS
// currently
AddGLNativeLibrary(gles_library);
AddGLNativeLibrary(egl_library);
return true;
}
#endif // !BUILDFLAG(USE_STATIC_ANGLE)
bool InitializeStaticEGLInternal(GLImplementationParts implementation) {
DCHECK(implementation.gl == kGLImplementationEGLANGLE);
#if BUILDFLAG(USE_STATIC_ANGLE)
if (!InitializeStaticANGLEEGL()) {
return false;
}
#else
if (!InitializeStaticEGLInternalFromLibrary()) {
return false;
}
#endif // !BUILDFLAG(USE_STATIC_ANGLE)
SetGLImplementationParts(implementation);
InitializeStaticGLBindingsGL();
InitializeStaticGLBindingsEGL();
return true;
}
} // namespace
GLDisplay* InitializeGLOneOffPlatform(gl::GpuPreference gpu_preference) {
GLDisplayEGL* display = GetDisplayEGL(gpu_preference);
switch (GetGLImplementation()) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE:
if (!InitializeDisplay(display, EGLDisplayPlatform(0))) {
LOG(ERROR) << "GLDisplayEGL::Initialize failed.";
return nullptr;
}
break;
default:
break;
}
return display;
}
bool InitializeStaticGLBindings(GLImplementationParts implementation) {
// Prevent reinitialization with a different implementation. Once the gpu
// unit tests have initialized with kGLImplementationMock, we don't want to
// later switch to another GL implementation.
DCHECK_EQ(kGLImplementationNone, GetGLImplementation());
// Allow the main thread or another to initialize these bindings
// after instituting restrictions on I/O. Going forward they will
// likely be used in the browser process on most platforms. The
// one-time initialization cost is small, between 2 and 5 ms.
base::ScopedAllowBlocking allow_blocking;
switch (implementation.gl) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE:
return InitializeStaticEGLInternal(implementation);
case kGLImplementationMockGL:
case kGLImplementationStubGL:
SetGLImplementationParts(implementation);
InitializeStaticGLBindingsGL();
return true;
default:
NOTREACHED();
}
}
void ShutdownGLPlatform(GLDisplay* display) {
ClearBindingsGL();
if (display)
display->Shutdown();
ClearBindingsEGL();
}
} // namespace init
} // namespace gl
|
