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1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "content/browser/renderer_host/compositing_iosurface_layer_mac.h" | |
6 | |
7 #include <CoreFoundation/CoreFoundation.h> | |
8 #include <OpenGL/gl.h> | |
9 | |
10 #include "base/mac/mac_util.h" | |
11 #include "base/mac/sdk_forward_declarations.h" | |
12 #include "content/browser/renderer_host/render_widget_host_impl.h" | |
13 #include "content/browser/renderer_host/render_widget_host_view_mac.h" | |
14 #include "content/browser/renderer_host/compositing_iosurface_context_mac.h" | |
15 #include "content/browser/renderer_host/compositing_iosurface_mac.h" | |
16 #include "ui/base/cocoa/animation_utils.h" | |
17 #include "ui/gfx/size_conversions.h" | |
18 #include "ui/gl/gpu_switching_manager.h" | |
19 | |
20 //////////////////////////////////////////////////////////////////////////////// | |
21 // CompositingIOSurfaceLayerHelper | |
22 | |
23 namespace content { | |
24 | |
25 CompositingIOSurfaceLayerHelper::CompositingIOSurfaceLayerHelper( | |
26 CompositingIOSurfaceLayerClient* client, | |
27 CompositingIOSurfaceLayer* layer) | |
28 : client_(client), | |
29 layer_(layer), | |
30 needs_display_(false), | |
31 has_pending_frame_(false), | |
32 did_not_draw_counter_(0), | |
33 is_pumping_frames_(false), | |
34 timer_( | |
35 FROM_HERE, | |
36 base::TimeDelta::FromSeconds(1) / 6, | |
37 this, | |
38 &CompositingIOSurfaceLayerHelper::TimerFired) {} | |
39 | |
40 CompositingIOSurfaceLayerHelper::~CompositingIOSurfaceLayerHelper() { | |
41 // Any acks that were waiting on this layer to draw will not occur, so ack | |
42 // them now to prevent blocking the renderer. | |
43 AckPendingFrame(true); | |
44 } | |
45 | |
46 void CompositingIOSurfaceLayerHelper::GotNewFrame() { | |
47 // A trace value of 2 indicates that there is a pending swap ack. See | |
48 // canDrawInCGLContext for other value meanings. | |
49 TRACE_COUNTER_ID1("browser", "PendingSwapAck", this, 2); | |
50 | |
51 has_pending_frame_ = true; | |
52 needs_display_ = true; | |
53 timer_.Reset(); | |
54 | |
55 // If reqested, draw immediately and don't bother trying to use the | |
56 // isAsynchronous property to ensure smooth animation. If this is while | |
57 // frames are being pumped then ack and display immediately to get a | |
58 // correct-sized frame displayed as soon as possible. | |
59 if (is_pumping_frames_ || client_->AcceleratedLayerShouldAckImmediately()) { | |
60 SetNeedsDisplayAndDisplayAndAck(); | |
61 } else { | |
62 if (![layer_ isAsynchronous]) | |
63 [layer_ setAsynchronous:YES]; | |
64 } | |
65 } | |
66 | |
67 void CompositingIOSurfaceLayerHelper::SetNeedsDisplay() { | |
68 needs_display_ = true; | |
69 } | |
70 | |
71 bool CompositingIOSurfaceLayerHelper::CanDraw() { | |
72 // If we return NO 30 times in a row, switch to being synchronous to avoid | |
73 // burning CPU cycles on this callback. | |
74 if (needs_display_) { | |
75 did_not_draw_counter_ = 0; | |
76 } else { | |
77 did_not_draw_counter_ += 1; | |
78 if (did_not_draw_counter_ == 30) | |
79 [layer_ setAsynchronous:NO]; | |
80 } | |
81 | |
82 // Add an instantaneous blip to the PendingSwapAck state to indicate | |
83 // that CoreAnimation asked if a frame is ready. A blip up to to 3 (usually | |
84 // from 2, indicating that a swap ack is pending) indicates that we | |
85 // requested a draw. A blip up to 1 (usually from 0, indicating there is no | |
86 // pending swap ack) indicates that we did not request a draw. This would | |
87 // be more natural to do with a tracing pseudo-thread | |
88 // http://crbug.com/366300 | |
89 TRACE_COUNTER_ID1("browser", "PendingSwapAck", this, needs_display_ ? 3 : 1); | |
90 TRACE_COUNTER_ID1("browser", "PendingSwapAck", this, | |
91 has_pending_frame_ ? 2 : 0); | |
92 | |
93 return needs_display_; | |
94 } | |
95 | |
96 void CompositingIOSurfaceLayerHelper::DidDraw(bool success) { | |
97 needs_display_ = false; | |
98 AckPendingFrame(success); | |
99 } | |
100 | |
101 void CompositingIOSurfaceLayerHelper::AckPendingFrame(bool success) { | |
102 if (!has_pending_frame_) | |
103 return; | |
104 has_pending_frame_ = false; | |
105 if (success) | |
106 client_->AcceleratedLayerDidDrawFrame(); | |
107 else | |
108 client_->AcceleratedLayerHitError(); | |
109 // A trace value of 0 indicates that there is no longer a pending swap ack. | |
110 TRACE_COUNTER_ID1("browser", "PendingSwapAck", this, 0); | |
111 } | |
112 | |
113 void CompositingIOSurfaceLayerHelper::SetNeedsDisplayAndDisplayAndAck() { | |
114 // Drawing using setNeedsDisplay and displayIfNeeded will result in | |
115 // subsequent canDrawInCGLContext callbacks getting dropped, and jerky | |
116 // animation. Disable asynchronous drawing before issuing these calls as a | |
117 // workaround. | |
118 // http://crbug.com/395827 | |
119 if ([layer_ isAsynchronous]) | |
120 [layer_ setAsynchronous:NO]; | |
121 | |
122 [layer_ setNeedsDisplay]; | |
123 DisplayIfNeededAndAck(); | |
124 } | |
125 | |
126 void CompositingIOSurfaceLayerHelper::DisplayIfNeededAndAck() { | |
127 if (!needs_display_) | |
128 return; | |
129 | |
130 // As in SetNeedsDisplayAndDisplayAndAck, disable asynchronous drawing before | |
131 // issuing displayIfNeeded. | |
132 // http://crbug.com/395827 | |
133 if ([layer_ isAsynchronous]) | |
134 [layer_ setAsynchronous:NO]; | |
135 | |
136 // Do not bother drawing while pumping new frames -- wait until the waiting | |
137 // block ends to draw any of the new frames. | |
138 if (!is_pumping_frames_) | |
139 [layer_ displayIfNeeded]; | |
140 | |
141 // Calls to setNeedsDisplay can sometimes be ignored, especially if issued | |
142 // rapidly (e.g, with vsync off). This is unacceptable because the failure | |
143 // to ack a single frame will hang the renderer. Ensure that the renderer | |
144 // not be blocked by lying and claiming that we drew the frame. | |
145 AckPendingFrame(true); | |
146 } | |
147 | |
148 void CompositingIOSurfaceLayerHelper::TimerFired() { | |
149 SetNeedsDisplayAndDisplayAndAck(); | |
150 } | |
151 | |
152 void CompositingIOSurfaceLayerHelper::BeginPumpingFrames() { | |
153 is_pumping_frames_ = true; | |
154 } | |
155 | |
156 void CompositingIOSurfaceLayerHelper::EndPumpingFrames() { | |
157 is_pumping_frames_ = false; | |
158 DisplayIfNeededAndAck(); | |
159 } | |
160 | |
161 } // namespace content | |
162 | |
163 //////////////////////////////////////////////////////////////////////////////// | |
164 // CompositingIOSurfaceLayer | |
165 | |
166 @implementation CompositingIOSurfaceLayer | |
167 | |
168 - (content::CompositingIOSurfaceMac*)iosurface { | |
169 return iosurface_.get(); | |
170 } | |
171 | |
172 - (content::CompositingIOSurfaceContext*)context { | |
173 return context_.get(); | |
174 } | |
175 | |
176 - (id)initWithIOSurface:(scoped_refptr<content::CompositingIOSurfaceMac>) | |
177 iosurface | |
178 withScaleFactor:(float)scale_factor | |
179 withClient:(content::CompositingIOSurfaceLayerClient*)client { | |
180 DCHECK(iosurface); | |
181 if (self = [super init]) { | |
182 helper_.reset(new content::CompositingIOSurfaceLayerHelper(client, self)); | |
183 | |
184 iosurface_ = iosurface; | |
185 context_ = content::CompositingIOSurfaceContext::Get( | |
186 content::CompositingIOSurfaceContext::kCALayerContextWindowNumber); | |
187 if (!context_) { | |
188 LOG(ERROR) << "Failed create CompositingIOSurfaceContext"; | |
189 [self resetClient]; | |
190 [self release]; | |
191 return nil; | |
192 } | |
193 | |
194 [self setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)]; | |
195 [self setAnchorPoint:CGPointMake(0, 0)]; | |
196 // Setting contents gravity is necessary to prevent the layer from being | |
197 // scaled during dyanmic resizes (especially with devtools open). | |
198 [self setContentsGravity:kCAGravityTopLeft]; | |
199 if ([self respondsToSelector:(@selector(setContentsScale:))]) { | |
200 [self setContentsScale:scale_factor]; | |
201 } | |
202 } | |
203 return self; | |
204 } | |
205 | |
206 - (void)dealloc { | |
207 DCHECK(!helper_); | |
208 [super dealloc]; | |
209 } | |
210 | |
211 - (void)resetClient { | |
212 helper_.reset(); | |
213 } | |
214 | |
215 - (void)gotNewFrame { | |
216 helper_->GotNewFrame(); | |
217 } | |
218 | |
219 - (void)setNeedsDisplayAndDisplayAndAck { | |
220 helper_->SetNeedsDisplayAndDisplayAndAck(); | |
221 } | |
222 | |
223 - (void)displayIfNeededAndAck { | |
224 helper_->DisplayIfNeededAndAck(); | |
225 } | |
226 | |
227 - (void)beginPumpingFrames { | |
228 helper_->BeginPumpingFrames(); | |
229 } | |
230 | |
231 - (void)endPumpingFrames { | |
232 helper_->EndPumpingFrames(); | |
233 } | |
234 | |
235 // The remaining methods implement the CAOpenGLLayer interface. | |
236 | |
237 - (CGLPixelFormatObj)copyCGLPixelFormatForDisplayMask:(uint32_t)mask { | |
238 if (!context_) | |
239 return [super copyCGLPixelFormatForDisplayMask:mask]; | |
240 return CGLRetainPixelFormat(CGLGetPixelFormat(context_->cgl_context())); | |
241 } | |
242 | |
243 - (CGLContextObj)copyCGLContextForPixelFormat:(CGLPixelFormatObj)pixelFormat { | |
244 if (!context_) | |
245 return [super copyCGLContextForPixelFormat:pixelFormat]; | |
246 return CGLRetainContext(context_->cgl_context()); | |
247 } | |
248 | |
249 - (void)setNeedsDisplay { | |
250 if (helper_) | |
251 helper_->SetNeedsDisplay(); | |
252 [super setNeedsDisplay]; | |
253 } | |
254 | |
255 - (BOOL)canDrawInCGLContext:(CGLContextObj)glContext | |
256 pixelFormat:(CGLPixelFormatObj)pixelFormat | |
257 forLayerTime:(CFTimeInterval)timeInterval | |
258 displayTime:(const CVTimeStamp*)timeStamp { | |
259 if (helper_) | |
260 return helper_->CanDraw(); | |
261 return NO; | |
262 } | |
263 | |
264 - (void)drawInCGLContext:(CGLContextObj)glContext | |
265 pixelFormat:(CGLPixelFormatObj)pixelFormat | |
266 forLayerTime:(CFTimeInterval)timeInterval | |
267 displayTime:(const CVTimeStamp*)timeStamp { | |
268 TRACE_EVENT0("browser", "CompositingIOSurfaceLayer::drawInCGLContext"); | |
269 | |
270 if (!iosurface_->HasIOSurface() || context_->cgl_context() != glContext) { | |
271 glClearColor(1, 1, 1, 1); | |
272 glClear(GL_COLOR_BUFFER_BIT); | |
273 return; | |
274 } | |
275 | |
276 // The correct viewport to cover the layer will be set up by the caller. | |
277 // Transform this into a window size for DrawIOSurface, where it will be | |
278 // transformed back into this viewport. | |
279 GLint viewport[4]; | |
280 glGetIntegerv(GL_VIEWPORT, viewport); | |
281 gfx::Rect window_rect(viewport[0], viewport[1], viewport[2], viewport[3]); | |
282 float window_scale_factor = 1.f; | |
283 if ([self respondsToSelector:(@selector(contentsScale))]) | |
284 window_scale_factor = [self contentsScale]; | |
285 window_rect = ToNearestRect( | |
286 gfx::ScaleRect(window_rect, 1.f/window_scale_factor)); | |
287 | |
288 bool draw_succeeded = iosurface_->DrawIOSurface( | |
289 context_, window_rect, window_scale_factor); | |
290 | |
291 if (helper_) | |
292 helper_->DidDraw(draw_succeeded); | |
293 | |
294 [super drawInCGLContext:glContext | |
295 pixelFormat:pixelFormat | |
296 forLayerTime:timeInterval | |
297 displayTime:timeStamp]; | |
298 } | |
299 | |
300 @end | |
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