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| 1 // Copyright 2017 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 "components/viz/client/local_surface_id_provider.h" |
| 6 #include "cc/output/compositor_frame.h" |
| 7 |
| 8 namespace viz { |
| 9 |
| 10 LocalSurfaceIdProvider::LocalSurfaceIdProvider() = default; |
| 11 |
| 12 LocalSurfaceIdProvider::~LocalSurfaceIdProvider() = default; |
| 13 |
| 14 DefaultLocalSurfaceIdProvider::DefaultLocalSurfaceIdProvider() = default; |
| 15 |
| 16 const cc::LocalSurfaceId& |
| 17 DefaultLocalSurfaceIdProvider::GetLocalSurfaceIdForFrame( |
| 18 const cc::CompositorFrame& frame) { |
| 19 gfx::Size frame_size = frame.render_pass_list.back()->output_rect.size(); |
| 20 if (!local_surface_id_.is_valid() || surface_size_ != frame_size || |
| 21 frame.metadata.device_scale_factor != device_scale_factor_) { |
| 22 local_surface_id_ = local_surface_id_allocator_.GenerateId(); |
| 23 } |
| 24 surface_size_ = frame_size; |
| 25 device_scale_factor_ = frame.metadata.device_scale_factor; |
| 26 return local_surface_id_; |
| 27 } |
| 28 |
| 29 } // namespace viz |
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