mirror of
https://github.com/rn10950/RetroZilla.git
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139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
/* vim:set tw=80 expandtab softtabstop=4 ts=4 sw=4: */
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/* ***** 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 the Mozilla ICO Decoder.
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*
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* The Initial Developer of the Original Code is
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* Netscape.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* David Hyatt <hyatt@netscape.com> (Original Author)
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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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#ifndef _nsICODecoder_h
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#define _nsICODecoder_h
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#include "nsCOMPtr.h"
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#include "imgIDecoder.h"
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#include "imgIContainer.h"
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#include "imgIDecoderObserver.h"
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#include "gfxIImageFrame.h"
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#include "nsBMPDecoder.h"
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// {CB3EDE1A-0FA5-4e27-AAFE-0F7801E5A1F1}
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#define NS_ICODECODER_CID \
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{ 0xcb3ede1a, 0xfa5, 0x4e27, { 0xaa, 0xfe, 0xf, 0x78, 0x1, 0xe5, 0xa1, 0xf1 } }
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#if defined(XP_WIN) || defined(XP_OS2) || defined(XP_BEOS) || defined(MOZ_WIDGET_PHOTON)
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#define GFXFORMATALPHA8 gfxIFormats::BGR_A8
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#else
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#define USE_RGBA1
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#define GFXFORMATALPHA8 gfxIFormats::RGB_A8
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#endif
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struct IconDirEntry
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{
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PRUint8 mWidth;
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PRUint8 mHeight;
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PRUint8 mColorCount;
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PRUint8 mReserved;
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union {
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PRUint16 mPlanes; // ICO
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PRUint16 mXHotspot; // CUR
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};
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union {
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PRUint16 mBitCount; // ICO
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PRUint16 mYHotspot; // CUR
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};
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PRUint32 mBytesInRes;
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PRUint32 mImageOffset;
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};
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class nsICODecoder : public imgIDecoder
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_IMGIDECODER
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nsICODecoder();
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virtual ~nsICODecoder();
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private:
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/** Callback for ReadSegments to avoid copying the data */
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static NS_METHOD ReadSegCb(nsIInputStream* aIn, void* aClosure,
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const char* aFromRawSegment, PRUint32 aToOffset,
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PRUint32 aCount, PRUint32 *aWriteCount);
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// Private helper methods
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nsresult ProcessData(const char* aBuffer, PRUint32 aCount);
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void ProcessDirEntry(IconDirEntry& aTarget);
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void ProcessInfoHeader();
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nsresult SetImageData();
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nsresult SetAlphaData();
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PRUint32 CalcAlphaRowSize();
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private:
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nsCOMPtr<imgIDecoderObserver> mObserver;
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nsCOMPtr<imgIContainer> mImage;
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nsCOMPtr<gfxIImageFrame> mFrame;
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PRUint8 mHaveAlphaData;
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PRPackedBool mDecodingAndMask;
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PRUint32 mPos;
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PRUint16 mNumIcons;
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PRUint16 mCurrIcon;
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PRUint32 mImageOffset;
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char mDirEntryArray[16];
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IconDirEntry mDirEntry;
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char mBIHraw[40];
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BMPINFOHEADER mBIH;
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PRUint32 mNumColors;
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colorTable* mColors;
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PRUint8* mRow; // Holds one raw line of the image
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PRUint32 mRowBytes; // How many bytes of the row were already received
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PRInt32 mCurLine;
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nsresult mStatus;
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PRUint8* mDecodedBuffer;
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PRUint8* mAlphaBuffer;
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PRPackedBool mIsCursor;
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};
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#endif
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