9732e29bce
Bug: 135133301
Test: Ib84462ea5fa8a7779eaa44494775e182e52ecaca, once
I4cf8bfb0aacfb8e22c3f9b1689bd614ed1253673 lands
AAssetStreamAdaptor lives in libjnigraphics, for use by AImageDecoder.
Change-Id: I4e2559c3c21c866d61fb431a0a1368150c7d39cb
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "SkStream.h"
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#include <android/asset_manager.h>
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// Like AssetStreamAdaptor, but operates on AAsset, a public NDK API.
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class AAssetStreamAdaptor : public SkStreamRewindable {
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public:
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/**
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* Create an SkStream that reads from an AAsset.
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*
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* The AAsset must remain open for the lifetime of the Adaptor. The Adaptor
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* does *not* close the AAsset.
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*/
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explicit AAssetStreamAdaptor(AAsset*);
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bool rewind() override;
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size_t read(void* buffer, size_t size) override;
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bool hasLength() const override { return true; }
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size_t getLength() const override;
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bool hasPosition() const override;
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size_t getPosition() const override;
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bool seek(size_t position) override;
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bool move(long offset) override;
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bool isAtEnd() const override;
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const void* getMemoryBase() override;
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protected:
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SkStreamRewindable* onDuplicate() const override;
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private:
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AAsset* mAAsset;
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};
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