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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
|
// 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_surface.h"
#include <dwmapi.h>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/trace_event/trace_event.h"
#include "base/win/windows_version.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_surface_egl.h"
#include "ui/gl/gl_surface_osmesa.h"
#include "ui/gl/gl_surface_stub.h"
#include "ui/gl/gl_surface_wgl.h"
// From ANGLE's egl/eglext.h.
#if !defined(EGL_D3D11_ELSE_D3D9_DISPLAY_ANGLE)
#define EGL_D3D11_ELSE_D3D9_DISPLAY_ANGLE \
reinterpret_cast<EGLNativeDisplayType>(-2)
#endif
namespace gfx {
// This OSMesa GL surface can use GDI to swap the contents of the buffer to a
// view.
class NativeViewGLSurfaceOSMesa : public GLSurfaceOSMesa {
public:
explicit NativeViewGLSurfaceOSMesa(gfx::AcceleratedWidget window);
// Implement subset of GLSurface.
bool Initialize() override;
void Destroy() override;
bool IsOffscreen() override;
gfx::SwapResult SwapBuffers() override;
bool SupportsPostSubBuffer() override;
gfx::SwapResult PostSubBuffer(int x, int y, int width, int height) override;
private:
~NativeViewGLSurfaceOSMesa() override;
gfx::AcceleratedWidget window_;
HDC device_context_;
DISALLOW_COPY_AND_ASSIGN(NativeViewGLSurfaceOSMesa);
};
class WinVSyncProvider : public VSyncProvider {
public:
explicit WinVSyncProvider(gfx::AcceleratedWidget window) :
window_(window)
{
use_dwm_ = (base::win::GetVersion() >= base::win::VERSION_WIN7);
}
~WinVSyncProvider() override {}
void GetVSyncParameters(const UpdateVSyncCallback& callback) override {
TRACE_EVENT0("gpu", "WinVSyncProvider::GetVSyncParameters");
base::TimeTicks timebase;
base::TimeDelta interval;
bool dwm_active = false;
// Query the DWM timing info first if available. This will provide the most
// precise values.
if (use_dwm_) {
DWM_TIMING_INFO timing_info;
timing_info.cbSize = sizeof(timing_info);
HRESULT result = DwmGetCompositionTimingInfo(NULL, &timing_info);
if (result == S_OK) {
dwm_active = true;
// Calculate an interval value using the rateRefresh numerator and
// denominator.
base::TimeDelta rate_interval;
if (timing_info.rateRefresh.uiDenominator > 0 &&
timing_info.rateRefresh.uiNumerator > 0) {
// Swap the numerator/denominator to convert frequency to period.
rate_interval = base::TimeDelta::FromMicroseconds(
timing_info.rateRefresh.uiDenominator *
base::Time::kMicrosecondsPerSecond /
timing_info.rateRefresh.uiNumerator);
}
if (base::TimeTicks::IsHighResolution()) {
// qpcRefreshPeriod is very accurate but noisy, and must be used with
// a high resolution timebase to avoid frequently missing Vsync.
timebase = base::TimeTicks::FromQPCValue(
static_cast<LONGLONG>(timing_info.qpcVBlank));
interval = base::TimeDelta::FromQPCValue(
static_cast<LONGLONG>(timing_info.qpcRefreshPeriod));
// Check for interval values that are impossibly low. A 29 microsecond
// interval was seen (from a qpcRefreshPeriod of 60).
if (interval < base::TimeDelta::FromMilliseconds(1)) {
interval = rate_interval;
}
// Check for the qpcRefreshPeriod interval being improbably small
// compared to the rateRefresh calculated interval, as another
// attempt at detecting driver bugs.
if (!rate_interval.is_zero() && interval < rate_interval / 2) {
interval = rate_interval;
}
} else {
// If FrameTime is not high resolution, we do not want to translate
// the QPC value provided by DWM into the low-resolution timebase,
// which would be error prone and jittery. As a fallback, we assume
// the timebase is zero and use rateRefresh, which may be rounded but
// isn't noisy like qpcRefreshPeriod, instead. The fact that we don't
// have a timebase here may lead to brief periods of jank when our
// scheduling becomes offset from the hardware vsync.
interval = rate_interval;
}
}
}
if (!dwm_active) {
// When DWM compositing is active all displays are normalized to the
// refresh rate of the primary display, and won't composite any faster.
// If DWM compositing is disabled, though, we can use the refresh rates
// reported by each display, which will help systems that have mis-matched
// displays that run at different frequencies.
HMONITOR monitor = MonitorFromWindow(window_, MONITOR_DEFAULTTONEAREST);
MONITORINFOEX monitor_info;
monitor_info.cbSize = sizeof(MONITORINFOEX);
BOOL result = GetMonitorInfo(monitor, &monitor_info);
if (result) {
DEVMODE display_info;
display_info.dmSize = sizeof(DEVMODE);
display_info.dmDriverExtra = 0;
result = EnumDisplaySettings(monitor_info.szDevice,
ENUM_CURRENT_SETTINGS, &display_info);
if (result && display_info.dmDisplayFrequency > 1) {
interval = base::TimeDelta::FromMicroseconds(
(1.0 / static_cast<double>(display_info.dmDisplayFrequency)) *
base::Time::kMicrosecondsPerSecond);
}
}
}
if (interval.ToInternalValue() != 0) {
callback.Run(timebase, interval);
}
}
private:
DISALLOW_COPY_AND_ASSIGN(WinVSyncProvider);
gfx::AcceleratedWidget window_;
bool use_dwm_;
};
// Helper routine that does one-off initialization like determining the
// pixel format.
bool GLSurface::InitializeOneOffInternal() {
switch (GetGLImplementation()) {
case kGLImplementationDesktopGL:
if (!GLSurfaceWGL::InitializeOneOff()) {
LOG(ERROR) << "GLSurfaceWGL::InitializeOneOff failed.";
return false;
}
break;
case kGLImplementationEGLGLES2:
if (!GLSurfaceEGL::InitializeOneOff()) {
LOG(ERROR) << "GLSurfaceEGL::InitializeOneOff failed.";
return false;
}
break;
}
return true;
}
NativeViewGLSurfaceOSMesa::NativeViewGLSurfaceOSMesa(
gfx::AcceleratedWidget window)
: GLSurfaceOSMesa(OSMesaSurfaceFormatRGBA, gfx::Size(1, 1)),
window_(window),
device_context_(NULL) {
DCHECK(window);
}
NativeViewGLSurfaceOSMesa::~NativeViewGLSurfaceOSMesa() {
Destroy();
}
bool NativeViewGLSurfaceOSMesa::Initialize() {
if (!GLSurfaceOSMesa::Initialize())
return false;
device_context_ = GetDC(window_);
return true;
}
void NativeViewGLSurfaceOSMesa::Destroy() {
if (window_ && device_context_)
ReleaseDC(window_, device_context_);
device_context_ = NULL;
GLSurfaceOSMesa::Destroy();
}
bool NativeViewGLSurfaceOSMesa::IsOffscreen() {
return false;
}
gfx::SwapResult NativeViewGLSurfaceOSMesa::SwapBuffers() {
DCHECK(device_context_);
gfx::Size size = GetSize();
// Note: negating the height below causes GDI to treat the bitmap data as row
// 0 being at the top.
BITMAPV4HEADER info = { sizeof(BITMAPV4HEADER) };
info.bV4Width = size.width();
info.bV4Height = -size.height();
info.bV4Planes = 1;
info.bV4BitCount = 32;
info.bV4V4Compression = BI_BITFIELDS;
info.bV4RedMask = 0x000000FF;
info.bV4GreenMask = 0x0000FF00;
info.bV4BlueMask = 0x00FF0000;
info.bV4AlphaMask = 0xFF000000;
// Copy the back buffer to the window's device context. Do not check whether
// StretchDIBits succeeds or not. It will fail if the window has been
// destroyed but it is preferable to allow rendering to silently fail if the
// window is destroyed. This is because the primary application of this
// class of GLContext is for testing and we do not want every GL related ui /
// browser test to become flaky if there is a race condition between GL
// context destruction and window destruction.
StretchDIBits(device_context_,
0, 0, size.width(), size.height(),
0, 0, size.width(), size.height(),
GetHandle(),
reinterpret_cast<BITMAPINFO*>(&info),
DIB_RGB_COLORS,
SRCCOPY);
return gfx::SwapResult::SWAP_ACK;
}
bool NativeViewGLSurfaceOSMesa::SupportsPostSubBuffer() {
return true;
}
gfx::SwapResult NativeViewGLSurfaceOSMesa::PostSubBuffer(int x,
int y,
int width,
int height) {
DCHECK(device_context_);
gfx::Size size = GetSize();
// Note: negating the height below causes GDI to treat the bitmap data as row
// 0 being at the top.
BITMAPV4HEADER info = { sizeof(BITMAPV4HEADER) };
info.bV4Width = size.width();
info.bV4Height = -size.height();
info.bV4Planes = 1;
info.bV4BitCount = 32;
info.bV4V4Compression = BI_BITFIELDS;
info.bV4RedMask = 0x000000FF;
info.bV4GreenMask = 0x0000FF00;
info.bV4BlueMask = 0x00FF0000;
info.bV4AlphaMask = 0xFF000000;
// Copy the back buffer to the window's device context. Do not check whether
// StretchDIBits succeeds or not. It will fail if the window has been
// destroyed but it is preferable to allow rendering to silently fail if the
// window is destroyed. This is because the primary application of this
// class of GLContext is for testing and we do not want every GL related ui /
// browser test to become flaky if there is a race condition between GL
// context destruction and window destruction.
StretchDIBits(device_context_,
x, size.height() - y - height, width, height,
x, y, width, height,
GetHandle(),
reinterpret_cast<BITMAPINFO*>(&info),
DIB_RGB_COLORS,
SRCCOPY);
return gfx::SwapResult::SWAP_ACK;
}
scoped_refptr<GLSurface> GLSurface::CreateViewGLSurface(
gfx::AcceleratedWidget window) {
TRACE_EVENT0("gpu", "GLSurface::CreateViewGLSurface");
switch (GetGLImplementation()) {
case kGLImplementationOSMesaGL: {
scoped_refptr<GLSurface> surface(
new NativeViewGLSurfaceOSMesa(window));
if (!surface->Initialize())
return NULL;
return surface;
}
case kGLImplementationEGLGLES2: {
DCHECK(window != gfx::kNullAcceleratedWidget);
scoped_refptr<NativeViewGLSurfaceEGL> surface(
new NativeViewGLSurfaceEGL(window));
scoped_ptr<VSyncProvider> sync_provider;
sync_provider.reset(new WinVSyncProvider(window));
if (!surface->Initialize(sync_provider.Pass()))
return NULL;
return surface;
}
case kGLImplementationDesktopGL: {
scoped_refptr<GLSurface> surface(new NativeViewGLSurfaceWGL(
window));
if (!surface->Initialize())
return NULL;
return surface;
}
case kGLImplementationMockGL:
return new GLSurfaceStub;
default:
NOTREACHED();
return NULL;
}
}
scoped_refptr<GLSurface> GLSurface::CreateOffscreenGLSurface(
const gfx::Size& size) {
TRACE_EVENT0("gpu", "GLSurface::CreateOffscreenGLSurface");
switch (GetGLImplementation()) {
case kGLImplementationOSMesaGL: {
scoped_refptr<GLSurface> surface(
new GLSurfaceOSMesa(OSMesaSurfaceFormatRGBA, size));
if (!surface->Initialize())
return NULL;
return surface;
}
case kGLImplementationEGLGLES2: {
scoped_refptr<GLSurface> surface(new PbufferGLSurfaceEGL(size));
if (!surface->Initialize())
return NULL;
return surface;
}
case kGLImplementationDesktopGL: {
scoped_refptr<GLSurface> surface(new PbufferGLSurfaceWGL(size));
if (!surface->Initialize())
return NULL;
return surface;
}
case kGLImplementationMockGL:
return new GLSurfaceStub;
default:
NOTREACHED();
return NULL;
}
}
EGLNativeDisplayType GetPlatformDefaultEGLNativeDisplay() {
return GetDC(NULL);
}
} // namespace gfx
|