gifimage.h
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef _CGIFIMAGE_H
- #define _CGIFIMAGE_H
- #include "hxtypes.h"
- #include "hxresult.h"
- #include "lzw.h"
- class CGIFImage
- {
- public:
- struct GraphicControlExtension
- {
- UINT32 m_ulDisposalMethod;
- BOOL m_bUserInputExpected;
- BOOL m_bTransparentIndexGiven;
- UINT32 m_ulDelayTime;
- UINT32 m_ulTransparentColorIndex;
- };
- struct ImageDescriptor
- {
- UINT32 m_ulImageLeft;
- UINT32 m_ulImageTop;
- UINT32 m_ulImageWidth;
- UINT32 m_ulImageHeight;
- BOOL m_bLocalColorTablePresent;
- BOOL m_bInterlaced;
- BOOL m_bLocalColorsSorted;
- UINT32 m_ulLocalColorTableBits;
- UINT32 m_ulLocalColorTableNumEntries;
- };
- protected:
- enum
- {
- kRedIndex = 0,
- kGreenIndex = 1,
- kBlueIndex = 2,
- kStateConstructed = 0,
- kStateDecoInitialized = 1,
- kStateDecoInProgress = 2,
- kStateDecoFinished = 3,
- kDisposalMethodNoneSpecified = 0,
- kDisposalMethodDoNotDispose = 1,
- kDisposalMethodRestoreToBackground = 2,
- kDisposalMethodRestoreToPrevious = 3
- };
- ImageDescriptor m_cID;
- GraphicControlExtension m_cGCE;
- BOOL m_bGCEPresent;
- BYTE *m_pucLocalColorMap;
- BOOL m_bGlobalColorMapPresent;
- UINT32 m_ulNumGlobalColors;
- BYTE *m_pucGlobalColorMap;
- BYTE *m_pOutputBuffer;
- UINT32 m_ulOutputBufferSize;
- UINT32 m_ulCurX;
- UINT32 m_ulCurY;
- UINT32 m_ulPass;
- BYTE *m_pOutPtr;
- UINT32 m_ulState;
- LZWCodec *m_pLZWCodec;
- BOOL m_bValid;
- void Reset();
- void BumpPixel();
- public:
- CGIFImage();
- ~CGIFImage();
- void SetGlobalColorMap(UINT32 ulNumColors, BYTE *pMap);
- HX_RESULT SetCompressedBufferSize(UINT32 ulSize);
- HX_RESULT InitDecompress(BYTE *pBuffer, UINT32 ulLen);
- HX_RESULT Decompress(BYTE *pBuffer, UINT32 ulLen);
- HX_RESULT GetIndexImage(BYTE *pLogicalScreen, UINT32 ulWidth, UINT32 ulHeight,
- UINT32 ulPadWidth, BOOL bRowsInverted);
- HX_RESULT GetRGBImage(BYTE *pLogicalScreen, UINT32 ulWidth, UINT32 ulHeight, UINT32 ulPadWidth,
- UINT32 ulBytesPerPixel, BOOL bRowsInverted, BOOL bRGBOrdering,
- BYTE ucBackRed, BYTE ucBackGreen, BYTE ucBackBlue,
- BYTE ulAlpha = 0);
- HX_RESULT GetRGBImageEx(BYTE *pLogicalScreen, UINT32 ulWidth, UINT32 ulHeight, UINT32 ulPadWidth,
- UINT32 ulBytesPerPixel, BOOL bRowsInverted, BOOL bRGBOrdering,
- UINT32 ulBgColor, BOOL bMediaOpacity, UINT32 ulMediaOpacity,
- BOOL bChromaKey, UINT32 ulChromaKey, UINT32 ulChromaKeyTol, UINT32 ulChromaKeyOpacity);
- HX_RESULT GetRGB32(BYTE *pBuffer, UINT32 ulRowStride, BOOL bRowsInverted);
- void TermDecompress();
- BYTE *GetOutputBuffer() { return m_pOutputBuffer; }
- BOOL Finished() { return (m_ulState == kStateDecoFinished ? TRUE : FALSE); }
- void SetFinished() { m_ulState = kStateDecoFinished; }
- BOOL LocalColorMapPresent() { return m_cID.m_bLocalColorTablePresent; }
- UINT32 GetImageWidth() { return m_cID.m_ulImageWidth; }
- UINT32 GetImageHeight() { return m_cID.m_ulImageHeight; }
- UINT32 GetImageLeft() { return m_cID.m_ulImageLeft; }
- UINT32 GetImageTop() { return m_cID.m_ulImageTop; }
- UINT32 GetLocalColorTableNumEntries() { return m_cID.m_ulLocalColorTableNumEntries; }
- BYTE *GetLocalColorTable() { return m_pucLocalColorMap; }
- BOOL GCEPresent() { return m_bGCEPresent; }
- UINT32 GetDelayTime();
- UINT32 GetDisposalMethod() { return m_cGCE.m_ulDisposalMethod; }
- BOOL Transparent() { return m_cGCE.m_bTransparentIndexGiven; }
- UINT32 GetTransparentIndex() { return m_cGCE.m_ulTransparentColorIndex; }
- BOOL GetValid() { return m_bValid; }
- void SetValid(BOOL bValid) { m_bValid = bValid; }
- static void ParseImageDescriptor(BYTE *pBuffer, ImageDescriptor &cID);
- static void ParseGraphicControlExtension(BYTE *pBuffer, GraphicControlExtension &cGCE);
- };
- inline UINT32 CGIFImage::GetDelayTime()
- {
- UINT32 ulRet = m_cGCE.m_ulDelayTime;
- if (!ulRet)
- {
- ulRet = 1;
- }
- return ulRet;
- }
- #endif