The Tor Browser / file comparison
comparison: image/encoders/ico/nsICOEncoder.h
image/encoders/ico/nsICOEncoder.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:2aef84c00581 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "mozilla/Attributes.h" | |
| 6 #include "mozilla/ReentrantMonitor.h" | |
| 7 | |
| 8 #include "imgIEncoder.h" | |
| 9 | |
| 10 #include "nsAutoPtr.h" | |
| 11 #include "nsCOMPtr.h" | |
| 12 #include "ICOFileHeaders.h" | |
| 13 | |
| 14 class nsBMPEncoder; | |
| 15 class nsPNGEncoder; | |
| 16 | |
| 17 #define NS_ICOENCODER_CID \ | |
| 18 { /*92AE3AB2-8968-41B1-8709-B6123BCEAF21 */ \ | |
| 19 0x92ae3ab2, \ | |
| 20 0x8968, \ | |
| 21 0x41b1, \ | |
| 22 {0x87, 0x09, 0xb6, 0x12, 0x3b, 0Xce, 0xaf, 0x21} \ | |
| 23 } | |
| 24 | |
| 25 // Provides ICO encoding functionality. Use InitFromData() to do the | |
| 26 // encoding. See that function definition for encoding options. | |
| 27 | |
| 28 class nsICOEncoder MOZ_FINAL : public imgIEncoder | |
| 29 { | |
| 30 typedef mozilla::ReentrantMonitor ReentrantMonitor; | |
| 31 public: | |
| 32 NS_DECL_THREADSAFE_ISUPPORTS | |
| 33 NS_DECL_IMGIENCODER | |
| 34 NS_DECL_NSIINPUTSTREAM | |
| 35 NS_DECL_NSIASYNCINPUTSTREAM | |
| 36 | |
| 37 nsICOEncoder(); | |
| 38 ~nsICOEncoder(); | |
| 39 | |
| 40 // Obtains the width of the icon directory entry | |
| 41 uint32_t GetRealWidth() const | |
| 42 { | |
| 43 return mICODirEntry.mWidth == 0 ? 256 : mICODirEntry.mWidth; | |
| 44 } | |
| 45 | |
| 46 // Obtains the height of the icon directory entry | |
| 47 uint32_t GetRealHeight() const | |
| 48 { | |
| 49 return mICODirEntry.mHeight == 0 ? 256 : mICODirEntry.mHeight; | |
| 50 } | |
| 51 | |
| 52 protected: | |
| 53 nsresult ParseOptions(const nsAString& aOptions, uint32_t* bpp, | |
| 54 bool *usePNG); | |
| 55 void NotifyListener(); | |
| 56 | |
| 57 // Initializes the icon file header mICOFileHeader | |
| 58 void InitFileHeader(); | |
| 59 // Initializes the icon directory info header mICODirEntry | |
| 60 void InitInfoHeader(uint32_t aBPP, uint8_t aWidth, uint8_t aHeight); | |
| 61 // Encodes the icon file header mICOFileHeader | |
| 62 void EncodeFileHeader(); | |
| 63 // Encodes the icon directory info header mICODirEntry | |
| 64 void EncodeInfoHeader(); | |
| 65 // Obtains the current offset filled up to for the image buffer | |
| 66 inline int32_t GetCurrentImageBufferOffset() | |
| 67 { | |
| 68 return static_cast<int32_t>(mImageBufferCurr - mImageBufferStart); | |
| 69 } | |
| 70 | |
| 71 // Holds either a PNG or a BMP depending on the encoding options specified | |
| 72 // or if no encoding options specified will use the default (PNG) | |
| 73 nsCOMPtr<imgIEncoder> mContainedEncoder; | |
| 74 | |
| 75 // These headers will always contain endian independent stuff. | |
| 76 // Don't trust the width and height of mICODirEntry directly, | |
| 77 // instead use the accessors GetRealWidth() and GetRealHeight(). | |
| 78 mozilla::image::IconFileHeader mICOFileHeader; | |
| 79 mozilla::image::IconDirEntry mICODirEntry; | |
| 80 | |
| 81 // Keeps track of the start of the image buffer | |
| 82 uint8_t* mImageBufferStart; | |
| 83 // Keeps track of the current position in the image buffer | |
| 84 uint8_t* mImageBufferCurr; | |
| 85 // Keeps track of the image buffer size | |
| 86 uint32_t mImageBufferSize; | |
| 87 // Keeps track of the number of bytes in the image buffer which are read | |
| 88 uint32_t mImageBufferReadPoint; | |
| 89 // Stores true if the image is done being encoded | |
| 90 bool mFinished; | |
| 91 // Stores true if the contained image is a PNG | |
| 92 bool mUsePNG; | |
| 93 | |
| 94 nsCOMPtr<nsIInputStreamCallback> mCallback; | |
| 95 nsCOMPtr<nsIEventTarget> mCallbackTarget; | |
| 96 uint32_t mNotifyThreshold; | |
| 97 }; |
