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Side by Side Diff: cc/ipc/mojo_compositor_frame_sink.mojom

Issue 2527283003: cc: Introduce BeginFrame sequence numbers and acknowledgements.
Patch Set: . Created 4 years ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved. 1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 module cc.mojom; 5 module cc.mojom;
6 6
7 import "cc/ipc/begin_frame_args.mojom"; 7 import "cc/ipc/begin_frame_args.mojom";
8 import "cc/ipc/compositor_frame.mojom"; 8 import "cc/ipc/compositor_frame.mojom";
9 import "cc/ipc/frame_sink_id.mojom"; 9 import "cc/ipc/frame_sink_id.mojom";
10 import "cc/ipc/local_frame_id.mojom"; 10 import "cc/ipc/local_frame_id.mojom";
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28 // For successful swaps, the implementation must call 28 // For successful swaps, the implementation must call
29 // DidReceiveCompositorFrameAck() asynchronously when the frame has been 29 // DidReceiveCompositorFrameAck() asynchronously when the frame has been
30 // processed in order to unthrottle the next frame. 30 // processed in order to unthrottle the next frame.
31 SubmitCompositorFrame(cc.mojom.LocalFrameId local_frame_id, 31 SubmitCompositorFrame(cc.mojom.LocalFrameId local_frame_id,
32 cc.mojom.CompositorFrame frame); 32 cc.mojom.CompositorFrame frame);
33 33
34 // Notify that the surface is no longer in use (and is okay to be evicted) so 34 // Notify that the surface is no longer in use (and is okay to be evicted) so
35 // that its resources gets returned in time. 35 // that its resources gets returned in time.
36 EvictFrame(); 36 EvictFrame();
37 37
38 // Notifies the frame sink that a BeginFrame was completed, but that no
39 // CompositorFrame was produced as a result of it.
40 BeginFrameDidNotDraw(BeginFrameAck ack);
41
38 // TODO(fsamuel): ReadbackBitmap API would be useful here. 42 // TODO(fsamuel): ReadbackBitmap API would be useful here.
39 }; 43 };
40 44
41 interface MojoCompositorFrameSinkClient { 45 interface MojoCompositorFrameSinkClient {
42 // Notification that the previous CompositorFrame given to 46 // Notification that the previous CompositorFrame given to
43 // SubmitCompositorFrame() has been processed and that another frame 47 // SubmitCompositorFrame() has been processed and that another frame
44 // can be submitted. This provides backpressure from the display compositor 48 // can be submitted. This provides backpressure from the display compositor
45 // so that frames are submitted only at the rate it can handle them. 49 // so that frames are submitted only at the rate it can handle them.
46 // TODO(fsamuel): This method ought not be necessary with unified BeginFrame. 50 // TODO(fsamuel): This method ought not be necessary with unified BeginFrame.
47 // However, there's a fair amount of cleanup and refactoring necessary to get 51 // However, there's a fair amount of cleanup and refactoring necessary to get
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59 }; 63 };
60 64
61 // MojoCompositorFrameSinkPrivate is used by the display compositor host to set 65 // MojoCompositorFrameSinkPrivate is used by the display compositor host to set
62 // up BeginFrameSource hierarchies. This API lives in SurfaceManager but is 66 // up BeginFrameSource hierarchies. This API lives in SurfaceManager but is
63 // called from here in order to ensure that hierarchy registration does not race 67 // called from here in order to ensure that hierarchy registration does not race
64 // CompositorFrameSink creation. 68 // CompositorFrameSink creation.
65 interface MojoCompositorFrameSinkPrivate { 69 interface MojoCompositorFrameSinkPrivate {
66 AddChildFrameSink(FrameSinkId child_frame_sink_id); 70 AddChildFrameSink(FrameSinkId child_frame_sink_id);
67 RemoveChildFrameSink(FrameSinkId child_frame_sink_id); 71 RemoveChildFrameSink(FrameSinkId child_frame_sink_id);
68 }; 72 };
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