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
|
// 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/gpu_switching_manager.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "ui/gl/gl_switches.h"
#if defined(OS_MACOSX)
#include <OpenGL/OpenGL.h>
#include "base/mac/mac_util.h"
#include "ui/gl/gl_context_cgl.h"
#endif // OS_MACOSX
namespace ui {
struct GpuSwitchingManager::PlatformSpecific {
#if defined(OS_MACOSX)
CGLPixelFormatObj discrete_pixel_format;
#endif // OS_MACOSX
};
// static
GpuSwitchingManager* GpuSwitchingManager::GetInstance() {
return Singleton<GpuSwitchingManager>::get();
}
GpuSwitchingManager::GpuSwitchingManager()
: gpu_switching_option_(gfx::PreferIntegratedGpu),
gpu_switching_option_set_(false),
supports_dual_gpus_(false),
supports_dual_gpus_set_(false),
platform_specific_(new PlatformSpecific) {
#if defined(OS_MACOSX)
platform_specific_->discrete_pixel_format = nullptr;
#endif // OS_MACOSX
}
GpuSwitchingManager::~GpuSwitchingManager() {
#if defined(OS_MACOSX)
if (platform_specific_->discrete_pixel_format)
CGLReleasePixelFormat(platform_specific_->discrete_pixel_format);
#endif // OS_MACOSX
}
void GpuSwitchingManager::ForceUseOfIntegratedGpu() {
DCHECK(SupportsDualGpus());
if (gpu_switching_option_set_) {
DCHECK_EQ(gpu_switching_option_, gfx::PreferIntegratedGpu);
} else {
gpu_switching_option_ = gfx::PreferIntegratedGpu;
gpu_switching_option_set_ = true;
}
}
void GpuSwitchingManager::ForceUseOfDiscreteGpu() {
DCHECK(SupportsDualGpus());
if (gpu_switching_option_set_) {
DCHECK_EQ(gpu_switching_option_, gfx::PreferDiscreteGpu);
} else {
gpu_switching_option_ = gfx::PreferDiscreteGpu;
gpu_switching_option_set_ = true;
#if defined(OS_MACOSX)
// Create a pixel format that lasts the lifespan of Chrome, so Chrome
// stays on the discrete GPU.
SwitchToDiscreteGpuMac();
#endif // OS_MACOSX
}
}
bool GpuSwitchingManager::SupportsDualGpus() {
if (!supports_dual_gpus_set_) {
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
bool flag = false;
if (command_line.HasSwitch(switches::kSupportsDualGpus)) {
// GPU process, flag is passed down from browser process.
std::string flag_string = command_line.GetSwitchValueASCII(
switches::kSupportsDualGpus);
if (flag_string == "true") {
flag = true;
} else if (flag_string == "false") {
flag = false;
} else {
NOTIMPLEMENTED();
}
} else {
// Browser process.
// We only compute this flag in the browser process.
#if defined(OS_MACOSX)
flag = (vendor_ids_.size() == 2);
if (flag && command_line.HasSwitch(switches::kUseGL) &&
command_line.GetSwitchValueASCII(switches::kUseGL) !=
gfx::kGLImplementationDesktopName)
flag = false;
if (flag && !base::mac::IsOSLionOrLater())
flag = false;
if (flag) {
// Only advertise that we have two GPUs to the rest of
// Chrome's code if we find an Intel GPU and some other
// vendor's GPU. Otherwise we don't understand the
// configuration and don't deal well with it (an example being
// the dual AMD GPUs in recent Mac Pros).
const uint32 intel = 0x8086;
flag = ((vendor_ids_[0] == intel && vendor_ids_[1] != intel) ||
(vendor_ids_[0] != intel && vendor_ids_[1] == intel));
}
#endif // OS_MACOSX
}
supports_dual_gpus_ = flag;
supports_dual_gpus_set_ = true;
}
return supports_dual_gpus_;
}
void GpuSwitchingManager::SetGpuVendorIds(
const std::vector<uint32>& vendor_ids) {
vendor_ids_ = vendor_ids;
}
void GpuSwitchingManager::AddObserver(GpuSwitchingObserver* observer) {
observer_list_.AddObserver(observer);
}
void GpuSwitchingManager::RemoveObserver(GpuSwitchingObserver* observer) {
observer_list_.RemoveObserver(observer);
}
void GpuSwitchingManager::NotifyGpuSwitched() {
FOR_EACH_OBSERVER(GpuSwitchingObserver, observer_list_, OnGpuSwitched());
}
gfx::GpuPreference GpuSwitchingManager::AdjustGpuPreference(
gfx::GpuPreference gpu_preference) {
if (!gpu_switching_option_set_)
return gpu_preference;
return gpu_switching_option_;
}
#if defined(OS_MACOSX)
void GpuSwitchingManager::SwitchToDiscreteGpuMac() {
if (platform_specific_->discrete_pixel_format)
return;
CGLPixelFormatAttribute attribs[1];
attribs[0] = static_cast<CGLPixelFormatAttribute>(0);
GLint num_pixel_formats = 0;
CGLChoosePixelFormat(attribs, &platform_specific_->discrete_pixel_format,
&num_pixel_formats);
}
#endif // OS_MACOSX
} // namespace ui
|
