binfilter/inc/bf_svtools/gifread.hxx

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  30
  31 #ifndef _GIFREAD_HXX
  32 #define _GIFREAD_HXX
  33
  34 #ifndef _GRAPH_HXX
  35 #include <vcl/graph.hxx>
  36 #endif
  37 #ifndef _BMPACC_HXX
  38 #include <vcl/bmpacc.hxx>
  39 #endif
  40
  41 class SvStream;
  42
  43 namespace binfilter
  44 {
  45
  46 #ifdef _GIFPRIVATE
  47
  48 // ---------
  49 // - Enums -
  50 // ---------
  51
  52 enum GIFAction
  53 {
  54         GLOBAL_HEADER_READING,
  55         MARKER_READING,
  56         EXTENSION_READING,
  57         LOCAL_HEADER_READING,
  58         FIRST_BLOCK_READING,
  59         NEXT_BLOCK_READING,
  60         ABORT_READING,
  61         END_READING
  62 };
  63
  64 // ------------------------------------------------------------------------
  65
  66 enum ReadState
  67 {
  68         GIFREAD_OK,
  69         GIFREAD_ERROR,
  70         GIFREAD_NEED_MORE
  71 };
  72
  73 // -------------
  74 // - GIFReader -
  75 // -------------
  76
  77 class GIFLZWDecompressor;
  78
  79 class GIFReader : public GraphicReader
  80 {
  81         Graphic                         aImGraphic;
  82         Animation                       aAnimation;
  83         Bitmap                          aBmp8;
  84         Bitmap                          aBmp1;
  85         BitmapPalette           aGPalette;
  86         BitmapPalette           aLPalette;
  87         SvStream&                       rIStm;
  88         void*                           pCallerData;
  89         HPBYTE                          pSrcBuf;
  90         GIFLZWDecompressor*     pDecomp;
  91         BitmapWriteAccess*      pAcc8;
  92         BitmapWriteAccess*      pAcc1;
  93         long                            nYAcc;
  94         long                            nLastPos;
  95         sal_uInt32                      nLogWidth100;
  96         sal_uInt32                      nLogHeight100;
  97         USHORT                          nTimer;
  98         USHORT                          nGlobalWidth;                   // maximale Bildbreite aus Header
  99         USHORT                          nGlobalHeight;                  // maximale Bildhoehe aus Header
 100         USHORT                          nImageWidth;                    // maximale Bildbreite aus Header
 101         USHORT                          nImageHeight;                   // maximale Bildhoehe aus Header
 102         USHORT                          nImagePosX;
 103         USHORT                          nImagePosY;
 104         USHORT                          nImageX;                                // maximale Bildbreite aus Header
 105         USHORT                          nImageY;                                // maximale Bildhoehe aus Header
 106         USHORT                          nLastImageY;
 107         USHORT                          nLastInterCount;
 108         USHORT                          nLoops;
 109         GIFAction                       eActAction;
 110         BOOL                            bStatus;
 111         BOOL                            bGCTransparent;                 // Ob das Bild Transparent ist, wenn ja:
 112         BOOL                            bInterlaced;
 113         BOOL                            bOverreadBlock;
 114         BOOL                            bImGraphicReady;
 115         BOOL                            bGlobalPalette;
 116         BYTE                            nBackgroundColor;               // Hintergrundfarbe
 117         BYTE                            nGCTransparentIndex;    // Pixel von diesem Index sind durchsichtig
 118         BYTE                            nGCDisposalMethod;              // 'Disposal Method' (siehe GIF-Doku)
 119         BYTE                            cTransIndex1;
 120         BYTE                            cNonTransIndex1;
 121
 122         void                            ReadPaletteEntries( BitmapPalette* pPal, ULONG nCount );
 123         void                            ClearImageExtensions();
 124         BOOL                            CreateBitmaps( long nWidth, long nHeight, BitmapPalette* pPal, BOOL bWatchForBackgroundColor );
 125         BOOL                            ReadGlobalHeader();
 126         BOOL                            ReadExtension();
 127         BOOL                            ReadLocalHeader();
 128         ULONG                           ReadNextBlock();
 129         void                            FillImages( HPBYTE pBytes, ULONG nCount );
 130         void                            CreateNewBitmaps();
 131         BOOL                            ProcessGIF();
 132
 133 public:
 134
 135         ReadState                       ReadGIF( Graphic& rGraphic );
 136         const Graphic&          GetIntermediateGraphic();
 137
 138                                                 GIFReader( SvStream& rStm );
 139         virtual                         ~GIFReader();
 140 };
 141
 142 #endif // _GIFPRIVATE
 143
 144 // -------------
 145 // - ImportGIF -
 146 // -------------
 147
 148  BOOL ImportGIF( SvStream& rStream, Graphic& rGraphic );
 149
 150  }
 151
 152 #endif // _GIFREAD_HXX