mirror of
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131 lines
4.7 KiB
C++
131 lines
4.7 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is an implementation of an icon encoder.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian R. Bondy <netzen@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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 "nsAutoPtr.h"
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#include "nsCOMPtr.h"
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#include "ICOFileHeaders.h"
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class nsBMPEncoder;
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class nsPNGEncoder;
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#define NS_ICOENCODER_CID \
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{ /*92AE3AB2-8968-41B1-8709-B6123BCEAF21 */ \
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0x92ae3ab2, \
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0x8968, \
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0x41b1, \
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{0x87, 0x09, 0xb6, 0x12, 0x3b, 0Xce, 0xaf, 0x21} \
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}
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// Provides ICO encoding functionality. Use InitFromData() to do the
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// encoding. See that function definition for encoding options.
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class nsICOEncoder 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_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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nsICOEncoder();
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~nsICOEncoder();
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// Obtains the width of the icon directory entry
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PRUint32 GetRealWidth() const
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{
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return mICODirEntry.mWidth == 0 ? 256 : mICODirEntry.mWidth;
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}
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// Obtains the height of the icon directory entry
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PRUint32 GetRealHeight() const
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{
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return mICODirEntry.mHeight == 0 ? 256 : mICODirEntry.mHeight;
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}
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protected:
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nsresult ParseOptions(const nsAString& aOptions, PRUint32* bpp,
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bool *usePNG);
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void NotifyListener();
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// Initializes the icon file header mICOFileHeader
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void InitFileHeader();
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// Initializes the icon directory info header mICODirEntry
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void InitInfoHeader(PRUint32 aBPP, PRUint8 aWidth, PRUint8 aHeight);
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// Encodes the icon file header mICOFileHeader
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void EncodeFileHeader();
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// Encodes the icon directory info header mICODirEntry
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void EncodeInfoHeader();
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// Obtains the current offset filled up to for the image buffer
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inline PRInt32 GetCurrentImageBufferOffset()
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{
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return static_cast<PRInt32>(mImageBufferCurr - mImageBufferStart);
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}
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// Holds either a PNG or a BMP depending on the encoding options specified
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// or if no encoding options specified will use the default (PNG)
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nsCOMPtr<imgIEncoder> mContainedEncoder;
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// These headers will always contain endian independent stuff.
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// Don't trust the width and height of mICODirEntry directly,
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// instead use the accessors GetRealWidth() and GetRealHeight().
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mozilla::imagelib::IconFileHeader mICOFileHeader;
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mozilla::imagelib::IconDirEntry mICODirEntry;
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// Keeps track of the start of the image buffer
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PRUint8* mImageBufferStart;
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// Keeps track of the current position in the image buffer
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PRUint8* mImageBufferCurr;
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// Keeps track of the image buffer size
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PRUint32 mImageBufferSize;
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// Keeps track of the number of bytes in the image buffer which are read
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PRUint32 mImageBufferReadPoint;
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// Stores true if the image is done being encoded
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bool mFinished;
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// Stores true if the contained image is a PNG
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bool mUsePNG;
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nsCOMPtr<nsIInputStreamCallback> mCallback;
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nsCOMPtr<nsIEventTarget> mCallbackTarget;
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PRUint32 mNotifyThreshold;
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};
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