blob: 0a10f224fce682138d50249b68425114b5db0322 (
plain)
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
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gl/gl_implementation.h"
#include <algorithm>
#include <string>
#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/logging.h"
namespace gfx {
namespace {
const struct {
const char* name;
GLImplementation implementation;
} kGLImplementationNamePairs[] = {
{ kGLImplementationDesktopName, kGLImplementationDesktopGL },
{ kGLImplementationOSMesaName, kGLImplementationOSMesaGL },
#if defined(OS_MACOSX)
{ kGLImplementationAppleName, kGLImplementationAppleGL },
#endif
{ kGLImplementationEGLName, kGLImplementationEGLGLES2 },
{ kGLImplementationMockName, kGLImplementationMockGL }
};
typedef std::vector<base::NativeLibrary> LibraryArray;
GLImplementation g_gl_implementation = kGLImplementationNone;
LibraryArray* g_libraries;
GLGetProcAddressProc g_get_proc_address;
void CleanupNativeLibraries(void* unused) {
if (g_libraries) {
for (LibraryArray::iterator it = g_libraries->begin();
it != g_libraries->end(); ++it) {
base::UnloadNativeLibrary(*it);
}
delete g_libraries;
g_libraries = NULL;
}
}
bool ExportsCoreFunctionsFromGetProcAddress(GLImplementation implementation) {
switch (GetGLImplementation()) {
case kGLImplementationDesktopGL:
case kGLImplementationOSMesaGL:
case kGLImplementationAppleGL:
case kGLImplementationMockGL:
return true;
case kGLImplementationEGLGLES2:
return false;
default:
NOTREACHED();
return true;
}
}
}
GLImplementation GetNamedGLImplementation(const std::string& name) {
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kGLImplementationNamePairs); ++i) {
if (name == kGLImplementationNamePairs[i].name)
return kGLImplementationNamePairs[i].implementation;
}
return kGLImplementationNone;
}
const char* GetGLImplementationName(GLImplementation implementation) {
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kGLImplementationNamePairs); ++i) {
if (implementation == kGLImplementationNamePairs[i].implementation)
return kGLImplementationNamePairs[i].name;
}
return "unknown";
}
void SetGLImplementation(GLImplementation implementation) {
g_gl_implementation = implementation;
}
GLImplementation GetGLImplementation() {
return g_gl_implementation;
}
bool HasDesktopGLFeatures() {
return kGLImplementationDesktopGL == g_gl_implementation ||
kGLImplementationOSMesaGL == g_gl_implementation ||
kGLImplementationAppleGL == g_gl_implementation;
}
void AddGLNativeLibrary(base::NativeLibrary library) {
DCHECK(library);
if (!g_libraries) {
g_libraries = new LibraryArray;
base::AtExitManager::RegisterCallback(CleanupNativeLibraries, NULL);
}
g_libraries->push_back(library);
}
void UnloadGLNativeLibraries() {
CleanupNativeLibraries(NULL);
}
void SetGLGetProcAddressProc(GLGetProcAddressProc proc) {
DCHECK(proc);
g_get_proc_address = proc;
}
void* GetGLCoreProcAddress(const char* name) {
DCHECK(g_gl_implementation != kGLImplementationNone);
if (g_libraries) {
for (size_t i = 0; i < g_libraries->size(); ++i) {
void* proc = base::GetFunctionPointerFromNativeLibrary((*g_libraries)[i],
name);
if (proc)
return proc;
}
}
if (ExportsCoreFunctionsFromGetProcAddress(g_gl_implementation) &&
g_get_proc_address) {
void* proc = g_get_proc_address(name);
if (proc)
return proc;
}
return NULL;
}
void* GetGLProcAddress(const char* name) {
DCHECK(g_gl_implementation != kGLImplementationNone);
void* proc = GetGLCoreProcAddress(name);
if (!proc && g_get_proc_address) {
proc = g_get_proc_address(name);
if (proc)
return proc;
}
return proc;
}
} // namespace gfx
|
