pjs/modules/libpr0n/decoders/bmp/nsICODecoder.h

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/* vim:set tw=80 expandtab softtabstop=4 ts=4 sw=4: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla ICO Decoder.
*
* The Initial Developer of the Original Code is
* Netscape.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* David Hyatt <hyatt@netscape.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef _nsICODecoder_h
#define _nsICODecoder_h
#include "nsCOMPtr.h"
#include "imgIDecoder.h"
#include "imgIContainer.h"
#include "imgIDecoderObserver.h"
#include "gfxIImageFrame.h"
#include "nsBMPDecoder.h"
// {CB3EDE1A-0FA5-4e27-AAFE-0F7801E5A1F1}
#define NS_ICODECODER_CID \
{ 0xcb3ede1a, 0xfa5, 0x4e27, { 0xaa, 0xfe, 0xf, 0x78, 0x1, 0xe5, 0xa1, 0xf1 } }
#if defined(XP_WIN) || defined(XP_OS2) || defined(XP_BEOS) || defined(MOZ_WIDGET_PHOTON)
#define GFXFORMATALPHA8 gfxIFormats::BGR_A8
#else
#define USE_RGBA1
#define GFXFORMATALPHA8 gfxIFormats::RGB_A8
#endif
struct IconDirEntry
{
PRUint8 mWidth;
PRUint8 mHeight;
PRUint8 mColorCount;
PRUint8 mReserved;
union {
PRUint16 mPlanes; // ICO
PRUint16 mXHotspot; // CUR
};
union {
PRUint16 mBitCount; // ICO
PRUint16 mYHotspot; // CUR
};
PRUint32 mBytesInRes;
PRUint32 mImageOffset;
};
class nsICODecoder : public imgIDecoder
{
public:
NS_DECL_ISUPPORTS
NS_DECL_IMGIDECODER
nsICODecoder();
virtual ~nsICODecoder();
private:
/** Callback for ReadSegments to avoid copying the data */
static NS_METHOD ReadSegCb(nsIInputStream* aIn, void* aClosure,
const char* aFromRawSegment, PRUint32 aToOffset,
PRUint32 aCount, PRUint32 *aWriteCount);
// Private helper methods
nsresult ProcessData(const char* aBuffer, PRUint32 aCount);
void ProcessDirEntry(IconDirEntry& aTarget);
void ProcessInfoHeader();
nsresult SetImageData();
nsresult SetAlphaData();
PRUint32 CalcAlphaRowSize();
private:
nsCOMPtr<imgIDecoderObserver> mObserver;
nsCOMPtr<imgIContainer> mImage;
nsCOMPtr<gfxIImageFrame> mFrame;
PRUint8 mHaveAlphaData;
PRPackedBool mDecodingAndMask;
PRUint32 mPos;
PRUint16 mNumIcons;
PRUint16 mCurrIcon;
PRUint32 mImageOffset;
char mDirEntryArray[16];
IconDirEntry mDirEntry;
char mBIHraw[40];
BMPINFOHEADER mBIH;
PRUint32 mNumColors;
colorTable* mColors;
PRUint8* mRow; // Holds one raw line of the image
PRUint32 mRowBytes; // How many bytes of the row were already received
PRInt32 mCurLine;
nsresult mStatus;
PRUint8* mDecodedBuffer;
PRUint8* mAlphaBuffer;
PRPackedBool mIsCursor;
};
#endif