ui/android/resources/ui_resource_provider.h

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_ANDROID_RESOURCES_UI_RESOURCE_PROVIDER_H_
#define UI_ANDROID_RESOURCES_UI_RESOURCE_PROVIDER_H_

#include "base/feature_list.h"
#include "cc/resources/ui_resource_client.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkPixelRef.h"
#include "ui/android/ui_android_export.h"
#include "ui/gfx/geometry/size.h"

namespace ui {

UI_ANDROID_EXPORT BASE_DECLARE_FEATURE(kCompressBitmapAtBackgroundPriority);

class UI_ANDROID_EXPORT UIResourceProvider {
 public:
  // Compresses `raw_data` using ETC1 compression into an SkPixelRef. Can be
  // called on any thread. Returns nullptr on failure.
  // The compressed bitmap can then be used to create a UIResource.
  static sk_sp<SkPixelRef> CompressBitmap(SkBitmap raw_data,
                                          bool supports_etc_npot);
  // Same as above, lowering the thread priority while compression is in
  // progress. Only use in cases where latency is not important.
  static sk_sp<SkPixelRef> CompressBitmapAtBackgroundPriority(
      SkBitmap raw_data,
      bool supports_etc_npot);

  virtual cc::UIResourceId CreateUIResource(cc::UIResourceClient* client) = 0;
  virtual void DeleteUIResource(cc::UIResourceId resource_id) = 0;
  virtual bool SupportsETC1NonPowerOfTwo() const = 0;

 protected:
  virtual ~UIResourceProvider() {}
};

}  // namespace ui

#endif  // UI_ANDROID_RESOURCES_UI_RESOURCE_PROVIDER_H_