surface_control.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "impeller/toolkit/android/surface_control.h"
 
#include "impeller/base/validation.h"
#include "impeller/toolkit/android/proc_table.h"
#include "impeller/toolkit/android/surface_transaction.h"
 
namespace impeller::android {
 
SurfaceControl::SurfaceControl(ANativeWindow* window, const char* debug_name) {
  if (window == nullptr) {
    VALIDATION_LOG << "Parent window of surface was null.";
    return;
  }
  if (debug_name == nullptr) {
    debug_name = "Impeller Layer";
  }
  control_.reset(
      GetProcTable().ASurfaceControl_createFromWindow(window, debug_name));
}
 
SurfaceControl::~SurfaceControl() {
  if (IsValid() && !RemoveFromParent()) {
    VALIDATION_LOG << "Surface control could not be removed from its parent. "
                      "Expect a leak.";
  }
}
 
bool SurfaceControl::IsValid() const {
  return control_.is_valid();
}
 
ASurfaceControl* SurfaceControl::GetHandle() const {
  return control_.get();
}
 
bool SurfaceControl::RemoveFromParent() const {
  if (!IsValid()) {
    return false;
  }
  SurfaceTransaction transaction;
  if (!transaction.SetParent(*this, nullptr)) {
    return false;
  }
  return transaction.Apply();
}
 
bool SurfaceControl::IsAvailableOnPlatform() {
  return GetProcTable().IsValid() &&
         GetProcTable().ASurfaceControl_createFromWindow.IsAvailable() &&
         GetProcTable().ASurfaceTransaction_setEnableBackPressure.IsAvailable();
}
 
}  // namespace impeller::android