gifimage.h
上传用户:dangjiwu
上传日期:2013-07-19
资源大小:42019k
文件大小:8k
- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: gifimage.h,v 1.1.26.1 2004/07/09 01:54:26 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (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.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. 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
- * RPSL, the RCSL or the GPL.
- *
- * 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