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comparison: image/encoders/bmp/nsBMPEncoder.h
image/encoders/bmp/nsBMPEncoder.h
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| -1:000000000000 | 0:7d55537c2490 |
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| 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 #include "BMPFileHeaders.h" | |
| 10 | |
| 11 #include "nsCOMPtr.h" | |
| 12 | |
| 13 #define NS_BMPENCODER_CID \ | |
| 14 { /* 13a5320c-4c91-4FA4-bd16-b081a3ba8c0b */ \ | |
| 15 0x13a5320c, \ | |
| 16 0x4c91, \ | |
| 17 0x4fa4, \ | |
| 18 {0xbd, 0x16, 0xb0, 0x81, 0xa3, 0Xba, 0x8c, 0x0b} \ | |
| 19 } | |
| 20 | |
| 21 // Provides BMP encoding functionality. Use InitFromData() to do the | |
| 22 // encoding. See that function definition for encoding options. | |
| 23 | |
| 24 class nsBMPEncoder MOZ_FINAL : public imgIEncoder | |
| 25 { | |
| 26 typedef mozilla::ReentrantMonitor ReentrantMonitor; | |
| 27 public: | |
| 28 NS_DECL_THREADSAFE_ISUPPORTS | |
| 29 NS_DECL_IMGIENCODER | |
| 30 NS_DECL_NSIINPUTSTREAM | |
| 31 NS_DECL_NSIASYNCINPUTSTREAM | |
| 32 | |
| 33 nsBMPEncoder(); | |
| 34 ~nsBMPEncoder(); | |
| 35 | |
| 36 protected: | |
| 37 enum Version { | |
| 38 VERSION_3 = 3, | |
| 39 VERSION_5 = 5 | |
| 40 }; | |
| 41 | |
| 42 // See InitData in the cpp for valid parse options | |
| 43 nsresult ParseOptions(const nsAString& aOptions, Version* version, | |
| 44 uint32_t* bpp); | |
| 45 // Obtains data with no alpha in machine-independent byte order | |
| 46 void ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest, | |
| 47 uint32_t aPixelWidth); | |
| 48 // Thread safe notify listener | |
| 49 void NotifyListener(); | |
| 50 | |
| 51 // Initializes the bitmap file header member mBMPFileHeader | |
| 52 void InitFileHeader(Version aVersion, uint32_t aBPP, uint32_t aWidth, | |
| 53 uint32_t aHeight); | |
| 54 // Initializes the bitmap info header member mBMPInfoHeader | |
| 55 void InitInfoHeader(Version aVersion, uint32_t aBPP, uint32_t aWidth, | |
| 56 uint32_t aHeight); | |
| 57 | |
| 58 // Encodes the bitmap file header member mBMPFileHeader | |
| 59 void EncodeFileHeader(); | |
| 60 // Encodes the bitmap info header member mBMPInfoHeader | |
| 61 void EncodeInfoHeader(); | |
| 62 // Encodes a row of image data which does not have alpha data | |
| 63 void EncodeImageDataRow24(const uint8_t* aData); | |
| 64 // Encodes a row of image data which does have alpha data | |
| 65 void EncodeImageDataRow32(const uint8_t* aData); | |
| 66 // Obtains the current offset filled up to for the image buffer | |
| 67 inline int32_t GetCurrentImageBufferOffset() | |
| 68 { | |
| 69 return static_cast<int32_t>(mImageBufferCurr - mImageBufferStart); | |
| 70 } | |
| 71 | |
| 72 // These headers will always contain endian independent stuff | |
| 73 // They store the BMP headers which will be encoded | |
| 74 mozilla::image::BMPFILEHEADER mBMPFileHeader; | |
| 75 mozilla::image::BITMAPV5HEADER mBMPInfoHeader; | |
| 76 | |
| 77 // Keeps track of the start of the image buffer | |
| 78 uint8_t* mImageBufferStart; | |
| 79 // Keeps track of the current position in the image buffer | |
| 80 uint8_t* mImageBufferCurr; | |
| 81 // Keeps track of the image buffer size | |
| 82 uint32_t mImageBufferSize; | |
| 83 // Keeps track of the number of bytes in the image buffer which are read | |
| 84 uint32_t mImageBufferReadPoint; | |
| 85 // Stores true if the image is done being encoded | |
| 86 bool mFinished; | |
| 87 | |
| 88 nsCOMPtr<nsIInputStreamCallback> mCallback; | |
| 89 nsCOMPtr<nsIEventTarget> mCallbackTarget; | |
| 90 uint32_t mNotifyThreshold; | |
| 91 }; |
