| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef _ANDROID_GRAPHICS_UTILS_H_ |
| #define _ANDROID_GRAPHICS_UTILS_H_ |
| |
| #include "SkStream.h" |
| |
| #include "android_util_Binder.h" |
| |
| #include <jni.h> |
| #include <androidfw/Asset.h> |
| |
| namespace android { |
| |
| class AssetStreamAdaptor : public SkStreamRewindable { |
| public: |
| // Enum passed to constructor. If set to kYes_OwnAsset, |
| // the passed in Asset will be deleted upon destruction. |
| enum OwnAsset { |
| kYes_OwnAsset, |
| kNo_OwnAsset, |
| }; |
| |
| // Enum passed to constructor. If set to kYes_HasMemoryBase, |
| // getMemoryBase will return the Asset's buffer. |
| enum HasMemoryBase { |
| kYes_HasMemoryBase, |
| kNo_HasMemoryBase, |
| }; |
| |
| AssetStreamAdaptor(Asset*, OwnAsset, HasMemoryBase); |
| ~AssetStreamAdaptor(); |
| |
| virtual bool rewind(); |
| virtual size_t read(void* buffer, size_t size); |
| virtual bool hasLength() const { return true; } |
| virtual size_t getLength() const; |
| virtual bool isAtEnd() const; |
| |
| virtual const void* getMemoryBase() { return fMemoryBase; } |
| |
| virtual SkStreamRewindable* duplicate() const; |
| private: |
| Asset* fAsset; |
| const void* const fMemoryBase; |
| const OwnAsset fOwnAsset; |
| }; |
| |
| /** |
| * Make a deep copy of the asset, and return it as a stream, or NULL if there |
| * was an error. |
| * FIXME: If we could "ref/reopen" the asset, we may not need to copy it here. |
| */ |
| |
| SkMemoryStream* CopyAssetToStream(Asset*); |
| |
| /** Restore the file descriptor's offset in our destructor |
| */ |
| class AutoFDSeek { |
| public: |
| AutoFDSeek(int fd) : fFD(fd) { |
| fCurr = ::lseek(fd, 0, SEEK_CUR); |
| } |
| ~AutoFDSeek() { |
| if (fCurr >= 0) { |
| ::lseek(fFD, fCurr, SEEK_SET); |
| } |
| } |
| private: |
| int fFD; |
| off64_t fCurr; |
| }; |
| |
| jobject nullObjectReturn(const char msg[]); |
| |
| }; // namespace android |
| |
| #endif // _ANDROID_GRAPHICS_UTILS_H_ |