mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Attributes.h"
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#include "mozilla/ReentrantMonitor.h"
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#include "imgIEncoder.h"
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#include "BMPFileHeaders.h"
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#include "nsCOMPtr.h"
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#define NS_BMPENCODER_CID \
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{ /* 13a5320c-4c91-4FA4-bd16-b081a3ba8c0b */ \
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0x13a5320c, \
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0x4c91, \
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0x4fa4, \
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{0xbd, 0x16, 0xb0, 0x81, 0xa3, 0Xba, 0x8c, 0x0b} \
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}
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// Provides BMP encoding functionality. Use InitFromData() to do the
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// encoding. See that function definition for encoding options.
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class nsBMPEncoder MOZ_FINAL : public imgIEncoder
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{
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typedef mozilla::ReentrantMonitor ReentrantMonitor;
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_IMGIENCODER
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NS_DECL_NSIINPUTSTREAM
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NS_DECL_NSIASYNCINPUTSTREAM
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nsBMPEncoder();
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~nsBMPEncoder();
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protected:
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enum Version {
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VERSION_3 = 3,
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VERSION_5 = 5
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};
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// See InitData in the cpp for valid parse options
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nsresult ParseOptions(const nsAString& aOptions, Version* version,
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uint32_t* bpp);
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// Obtains data with no alpha in machine-independent byte order
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void ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
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uint32_t aPixelWidth);
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// Thread safe notify listener
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void NotifyListener();
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// Initializes the bitmap file header member mBMPFileHeader
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void InitFileHeader(Version aVersion, uint32_t aBPP, uint32_t aWidth,
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uint32_t aHeight);
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// Initializes the bitmap info header member mBMPInfoHeader
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void InitInfoHeader(Version aVersion, uint32_t aBPP, uint32_t aWidth,
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uint32_t aHeight);
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// Encodes the bitmap file header member mBMPFileHeader
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void EncodeFileHeader();
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// Encodes the bitmap info header member mBMPInfoHeader
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void EncodeInfoHeader();
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// Encodes a row of image data which does not have alpha data
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void EncodeImageDataRow24(const uint8_t* aData);
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// Encodes a row of image data which does have alpha data
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void EncodeImageDataRow32(const uint8_t* aData);
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// Obtains the current offset filled up to for the image buffer
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inline int32_t GetCurrentImageBufferOffset()
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{
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return static_cast<int32_t>(mImageBufferCurr - mImageBufferStart);
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}
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// These headers will always contain endian independent stuff
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// They store the BMP headers which will be encoded
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mozilla::image::BMPFILEHEADER mBMPFileHeader;
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mozilla::image::BITMAPV5HEADER mBMPInfoHeader;
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// Keeps track of the start of the image buffer
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uint8_t* mImageBufferStart;
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// Keeps track of the current position in the image buffer
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uint8_t* mImageBufferCurr;
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// Keeps track of the image buffer size
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uint32_t mImageBufferSize;
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// Keeps track of the number of bytes in the image buffer which are read
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uint32_t mImageBufferReadPoint;
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// Stores true if the image is done being encoded
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bool mFinished;
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nsCOMPtr<nsIInputStreamCallback> mCallback;
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nsCOMPtr<nsIEventTarget> mCallbackTarget;
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uint32_t mNotifyThreshold;
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};
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