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Surfaces identifiers have a local and a namespace component. The namespace is particular to a connection. The local component is up to the endpoint of the connection to manage. In contexts where a surface that may be from anywhere is referenced, a fully qualified ID with both the local and namespace component is needed in order to be unambiguous. In contexts that can only apply to local surfaces only the local id is needed. This updates the mojo.Surface APIs that can only refer to local IDs to only take the local component. In particular creating, destroying, or submitting a frame can only refer to surfaces created on that connection. References to surfaces within a frame may refer to local or foreign surfaces so they use fully qualified IDs. This also skips the SurfacesService indirection since many applications can perform useful operations on a mojo.Surface interface such as create surfaces and submit frames without knowing their ID namespace. The namespace component is needed only to pass fully qualified IDs to other actors that may wish to reference the produced frame. R=sky@chromium.org Review URL: https://codereview.chromium.org/826423008
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef SKY_COMPOSITOR_SURFACE_HOLDER_H_
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#define SKY_COMPOSITOR_SURFACE_HOLDER_H_
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#include "base/callback_forward.h"
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#include "base/memory/scoped_ptr.h"
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#include "base/memory/weak_ptr.h"
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#include "mojo/services/surfaces/public/interfaces/surface_id.mojom.h"
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#include "mojo/services/surfaces/public/interfaces/surfaces.mojom.h"
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#include "mojo/services/surfaces/public/interfaces/surfaces_service.mojom.h"
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#include "ui/gfx/geometry/rect.h"
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namespace mojo {
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class Shell;
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}
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namespace sky {
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class SurfaceAllocator;
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class SurfaceHolder : public mojo::SurfaceClient {
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public:
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class Client {
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public:
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virtual void OnSurfaceIdAvailable(mojo::SurfaceIdPtr surface_id) = 0;
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virtual void ReturnResources(
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mojo::Array<mojo::ReturnedResourcePtr> resources) = 0;
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protected:
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virtual ~Client();
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};
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explicit SurfaceHolder(Client* client, mojo::Shell* shell);
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~SurfaceHolder() override;
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void SetSize(const gfx::Size& size);
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void SubmitFrame(mojo::FramePtr frame, const base::Closure& callback);
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private:
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// mojo::SurfaceClient
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void SetIdNamespace(uint32_t id_namespace) override;
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void ReturnResources(
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mojo::Array<mojo::ReturnedResourcePtr> resources) override;
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void SetQualifiedId();
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Client* client_;
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gfx::Size size_;
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uint32_t id_namespace_;
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uint32_t local_id_;
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mojo::SurfacePtr surface_;
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base::WeakPtrFactory<SurfaceHolder> weak_factory_;
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DISALLOW_COPY_AND_ASSIGN(SurfaceHolder);
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};
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} // namespace sky
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#endif // SKY_COMPOSITOR_SURFACE_HOLDER_H_
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