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115 lines
3.8 KiB
115 lines
3.8 KiB
#ifndef _PalMap_h
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#define _PalMap_h
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// File: PalMap.h
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// Author: Michael Marr (mikemarr)
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//
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// Description:
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// This class helps perform on-the-fly pixel conversions.
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//
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// History:
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// -@- 11/18/96 (mikemarr) created
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// -@- 12/05/96 (mikemarr) modified
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// added code for translating all palettes to 8, 16, 24, and 32 bit;
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// transparency/alpha stuff is not yet implemented
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// -@- 06/24/97 (mikemarr) modified
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// removed PixelInfo
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// -@- 09/23/97 (mikemarr) copied to DXCConv from d2d\mmimage
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//
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// Notes:
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// REVIEW:
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// I probably will never support a 4 bit mode, since 4 bit stuff might
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// as well be stored as 8 bit since the space savings is small. However,
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// 2 and 1 bit stuff should still be considered, since the space savings
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// could be substantial. Further, 1 and 2 bit surfaces represent a large
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// class of content - line art, text, FAX, etc. (2 bits buys BGW +
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// transparency for example). This type of content tends to be much larger
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// in dimension -- so we need an efficient representation.
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#ifndef _PixInfo_h
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#include "PixInfo.h"
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#endif
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typedef WORD MapEntry16;
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typedef DWORD MapEntry24;
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typedef DWORD MapEntry32;
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#define flagTRANSPARENT 0x1
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#define flagPALETTIZED 0x2
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#define nMAXPALETTEENTRIES 256
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typedef enum ConvertCode {
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cvc4To8 = 0, cvc4To16, cvc4To24, cvc4To32,
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cvc8To8, cvc8To16, cvc8To24, cvc8To32,
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cvcInvalid, cvcNumCodes
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} ConvertCode;
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typedef HRESULT (*ConvertFunction)(const BYTE *pSrcPixels, long nSrcPitch,
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BYTE *pDstPixels, long nDstPitch,
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DWORD nWidth, DWORD nHeight,
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const BYTE *pIndexMap);
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typedef DWORD (*GetColorFunction)(DWORD dwSrcColor, const BYTE *pIndexMap);
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extern ConvertFunction g_rgConvertFunctions[cvcNumCodes];
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class CPaletteMap {
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public:
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CPaletteMap();
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~CPaletteMap();
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HRESULT CreateMap(BYTE nBPPSrcPixels, BYTE nBPPSrcPalette, LPPALETTEENTRY rgpeSrc,
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const CPixelInfo &pixiDst, LPDIRECTDRAWPALETTE pddpDst);
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HRESULT CreateMap(LPDIRECTDRAWPALETTE pddpSrc, const CPixelInfo &pixiDst,
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LPDIRECTDRAWPALETTE pddpDst);
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// HRESULT CreateSortedMap(BYTE nBPP, const RGB *rgrgbSrc, BYTE nBPPUsed, DWORD iTransColor,
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// DWORD dwFlags, LPPALETTEENTRY rgpeDst);
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HRESULT BltFast(LPDIRECTDRAWSURFACE pddsSrc, LPRECT prSrc, LPDIRECTDRAWSURFACE pddsDst,
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DWORD nXPos, DWORD nYPos, DWORD dwFlags) const;
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// REVIEW: this is not "clip-safe"
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HRESULT BltFast(const BYTE *pSrcPixels, long nSrcPitch, BYTE *pDstPixels, long nDstPitch,
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DWORD nWidth, DWORD nHeight);
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DWORD GetIndexMapping(DWORD iSrcColor) const;
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DWORD GetSrcBPP() const { return m_cSrcBPP; }
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DWORD GetDstBPP() const { return m_cDstBPP; }
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BOOL IsIdentity() const { return m_bIdentity; }
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private:
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HRESULT DoPalTo16BitMap(BYTE nSrcBPP, const CPixelInfo &pixiDst,
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const PALETTEENTRY *ppeSrc);
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HRESULT DoPalTo24BitMap(BYTE nSrcBPP, const CPixelInfo &pixiDst,
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const PALETTEENTRY *ppeSrc);
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HRESULT DoPalTo32BitMap(BYTE nSrcBPP, const CPixelInfo &pixiDst,
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const PALETTEENTRY *ppeSrc);
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HRESULT DoPalToPalMap(BYTE nSrcBPP, BYTE nDstBPP, const PALETTEENTRY *ppeSrc,
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const PALETTEENTRY *ppeDst);
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static int GetConvertCode(DWORD nSrcBPP, DWORD nDstBPP);
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private:
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BYTE * m_rgIndexMap;
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BYTE m_nConvertCode;
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// REVIEW: we don't need to store the src and dst info ==> implicit in ConvertCode
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BYTE m_cSrcBPP, m_cDstBPP;
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BYTE m_bIdentity;
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};
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inline HRESULT
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CPaletteMap::BltFast(const BYTE *pSrcPixels, long nSrcPitch, BYTE *pDstPixels, long nDstPitch,
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DWORD nWidth, DWORD nHeight)
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{
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ConvertFunction pfnConvertFunction = g_rgConvertFunctions[m_nConvertCode];
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if (pfnConvertFunction)
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return pfnConvertFunction(pSrcPixels, nSrcPitch, pDstPixels, nDstPitch,
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nWidth, nHeight, m_rgIndexMap);
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return E_NOTIMPL;
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}
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#endif
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