cc/output/overlay_candidate_validator.h

   1 // Copyright 2014 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 #ifndef CC_OUTPUT_OVERLAY_CANDIDATE_VALIDATOR_H_
   6 #define CC_OUTPUT_OVERLAY_CANDIDATE_VALIDATOR_H_
   7
   8 #include <vector>
   9
  10 #include "cc/base/cc_export.h"
  11 #include "cc/output/overlay_candidate.h"
  12 #include "cc/output/overlay_processor.h"
  13
  14 namespace cc {
  15
  16 // This class that can be used to answer questions about possible overlay
  17 // configurations for a particular output device.
  18 class CC_EXPORT OverlayCandidateValidator {
  19  public:
  20   // Populates a list of strategies that may work with this validator.
  21   virtual void GetStrategies(OverlayProcessor::StrategyList* strategies) = 0;
  22
  23   // A list of possible overlay candidates is presented to this function.
  24   // The expected result is that those candidates that can be in a separate
  25   // plane are marked with |overlay_handled| set to true, otherwise they are
  26   // to be traditionally composited. Candidates with |overlay_handled| set to
  27   // true must also have their |display_rect| converted to integer
  28   // coordinates if necessary.
  29   virtual void CheckOverlaySupport(OverlayCandidateList* surfaces) = 0;
  30
  31   virtual ~OverlayCandidateValidator() {}
  32 };
  33
  34 }  // namespace cc
  35
  36 #endif  // CC_OUTPUT_OVERLAY_CANDIDATE_VALIDATOR_H_