Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Andreas Gampe | ed6b9df | 2014-11-20 22:02:20 -0800 | [diff] [blame] | 17 | #ifndef _ANDROID_GRAPHICS_UTILS_H_ |
| 18 | #define _ANDROID_GRAPHICS_UTILS_H_ |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 19 | |
| 20 | #include "SkStream.h" |
| 21 | |
| 22 | #include "android_util_Binder.h" |
| 23 | |
| 24 | #include <jni.h> |
Mathias Agopian | b13b9bd | 2012-02-17 18:27:36 -0800 | [diff] [blame] | 25 | #include <androidfw/Asset.h> |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 26 | |
| 27 | namespace android { |
| 28 | |
Leon Scroggins III | ca32021 | 2013-08-20 17:59:39 -0400 | [diff] [blame] | 29 | class AssetStreamAdaptor : public SkStreamRewindable { |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 30 | public: |
Ben Wagner | c2d3957 | 2015-01-12 17:06:21 -0500 | [diff] [blame] | 31 | AssetStreamAdaptor(Asset*); |
Leon Scroggins III | 5e49b49 | 2013-12-03 16:26:51 -0500 | [diff] [blame] | 32 | |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 33 | virtual bool rewind(); |
| 34 | virtual size_t read(void* buffer, size_t size); |
Leon Scroggins III | ca32021 | 2013-08-20 17:59:39 -0400 | [diff] [blame] | 35 | virtual bool hasLength() const { return true; } |
| 36 | virtual size_t getLength() const; |
| 37 | virtual bool isAtEnd() const; |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 38 | |
Leon Scroggins III | ca32021 | 2013-08-20 17:59:39 -0400 | [diff] [blame] | 39 | virtual SkStreamRewindable* duplicate() const; |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 40 | private: |
Ben Wagner | c2d3957 | 2015-01-12 17:06:21 -0500 | [diff] [blame] | 41 | Asset* fAsset; |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 42 | }; |
| 43 | |
Leon Scroggins III | ca32021 | 2013-08-20 17:59:39 -0400 | [diff] [blame] | 44 | /** |
| 45 | * Make a deep copy of the asset, and return it as a stream, or NULL if there |
| 46 | * was an error. |
| 47 | * FIXME: If we could "ref/reopen" the asset, we may not need to copy it here. |
| 48 | */ |
| 49 | |
| 50 | SkMemoryStream* CopyAssetToStream(Asset*); |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 51 | |
| 52 | /** Restore the file descriptor's offset in our destructor |
| 53 | */ |
| 54 | class AutoFDSeek { |
| 55 | public: |
| 56 | AutoFDSeek(int fd) : fFD(fd) { |
| 57 | fCurr = ::lseek(fd, 0, SEEK_CUR); |
| 58 | } |
| 59 | ~AutoFDSeek() { |
| 60 | if (fCurr >= 0) { |
| 61 | ::lseek(fFD, fCurr, SEEK_SET); |
| 62 | } |
| 63 | } |
| 64 | private: |
| 65 | int fFD; |
Kenny Root | ddb76c4 | 2010-11-24 12:56:06 -0800 | [diff] [blame] | 66 | off64_t fCurr; |
Wei-Ta Chen | 6b849e2 | 2010-09-07 17:32:18 +0800 | [diff] [blame] | 67 | }; |
| 68 | |
| 69 | jobject nullObjectReturn(const char msg[]); |
| 70 | |
| 71 | }; // namespace android |
| 72 | |
Andreas Gampe | ed6b9df | 2014-11-20 22:02:20 -0800 | [diff] [blame] | 73 | #endif // _ANDROID_GRAPHICS_UTILS_H_ |