giffiltr.h

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// $Id: giffiltr.h 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
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----------------------------------

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=================================XARAHEADEREND============================
 */
//

#ifndef INC_GIFFILTR
#define INC_GIFFILTR

#include "maskfilt.h"
//#include "outptgif.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "bmpprefs.h"   // SelectionType
//#include "accures.h"

class CXaraFileRecord;

#define ZERO 0

/********************************************************************************************

  > class GIFImportOptions : public BitmapImportOptions

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    25/06/96
    Purpose:    Provides GIF specific options for the import

********************************************************************************************/
class GIFImportOptions : public BitmapImportOptions
{
    // Declare the class for memory tracking
    CC_DECLARE_MEMDUMP(GIFImportOptions);
public:
    GIFImportOptions() : BitmapImportOptions() {m_bProvideProgress = TRUE;}

};

typedef UINT32 CENTISECONDS;
/********************************************************************************************

>   class GIFExportOptions : public MaskedFilterExportOptions

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    30/10/96
    Purpose:    Base class for storing information about the bitmap we're exporting.

********************************************************************************************/
class GIFExportOptions : public MaskedFilterExportOptions
{
    CC_DECLARE_DYNCREATE(GIFExportOptions)
public:
    static BOOL Declare();

    GIFExportOptions();
    GIFExportOptions(const FilterType FilterID, const StringBase* pFilterName);

    virtual BOOL    RetrieveDefaults();
    virtual BOOL    SetAsDefaults() const;

    // Save and load from named export set properties.
    virtual BOOL Write(CXaraFileRecord* pRec);
    virtual BOOL Read(CXaraFileRecord* pRec);

    virtual BOOL    GetSupportsImageMap() { return TRUE; }

    BOOL                GetGlobalPalette() const                        { return m_GlobalPalette; }
    void                SetGlobalPalette(UINT32 GlobalPalette)          { m_GlobalPalette = GlobalPalette; }

    UINT32              GetLeftOffset() const                           { return m_LeftOffset; }
    void                SetLeftOffset(UINT32 LeftOffset)                    { m_LeftOffset = LeftOffset; }

    UINT32              GetTopOffset() const                            { return m_TopOffset; }
    void                SetTopOffset(UINT32 TopOffset)                  { m_TopOffset = TopOffset; }

    GIFDisposalMethod   GetAnimationRestore();
    BOOL                SetAnimationRestore(const GIFDisposalMethod& DisposalMethod);

    CENTISECONDS        GetAnimationDelay();
    BOOL                SetAnimationDelay(CENTISECONDS Delay);

    UINT32              GetAnimationLoopCount() const;
    BOOL                SetAnimationLoopCount(UINT32 LoopCount, BOOL Value);

    Coord               GetAnimationSize() const;
    BOOL                SetAnimationSize(const Coord& Size);

    BOOL                GetDelayValueIsDefault()    const               { return DelayValueIsDefault; }
    BOOL                SetDelayValueIsDefault(BOOL Value)              { DelayValueIsDefault = Value; return TRUE; }

    static KernelBitmap**   GetBitmapList()                             { return m_pBitmapList; }
    static void             SetBitmapList(KernelBitmap** pBitmap)       { m_pBitmapList = pBitmap; }

    static UINT32               GetListSize()               { return m_ListSize; }
    static void             SetListSize(UINT32 n)           { m_ListSize = n;    }
    static void             IncListSize(UINT32 n)           { m_ListSize += n;   }  
    static void             DecListSize(UINT32 n)           { m_ListSize -= n;   } 

    // for object copying and comparing
    virtual BOOL CopyFrom(BitmapExportOptions *pOther);
//  virtual BOOL Equal(BitmapExportOptions *pOther);

    virtual BOOL FileTypeChangeCopyFrom(BitmapExportOptions *pOther);

    UINT32  DelayIndex;
    UINT32  RestoreIndex;
    
    virtual UINT32 GetFilterNameStrID() { return _R(IDN_FILTERNAME_GIF);}


protected:
    BOOL                m_GlobalPalette;    // Animation has a global rather than a local palette
    UINT32              m_LeftOffset;       // left offset from overall bounds of animation
    UINT32              m_TopOffset;        // top offset from overall bounds of animation
    CENTISECONDS        m_AnimDelay;        // Delay between frames for Animations
    GIFDisposalMethod   m_AnimDispose;      // Disposal method for frames in Animation
    UINT32              m_AnimLoop;         // Number of times to loop Animation
    Coord               m_AnimSize;         // Size for Animation frames
    BOOL                        DelayValueIsDefault;
    static KernelBitmap**       m_pBitmapList;
    static UINT32                   m_ListSize;

    // Persistant buffer
    static CENTISECONDS         g_AnimationDelay;       // Milliseconds between frames.
    static GIFDisposalMethod    g_AnimationRestoreType;
    static UINT32                   g_AnimationLoopCount;   // Times animation should repeat.
};

class KernelBitmap;
class BaseCamelotFilter;

/********************************************************************************************

>   class TI_GIFFilter : public MaskedFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    24/4/95
    Purpose:    Encapsulates a Windows GIF export and import filter.
                Derives off the masked filter which provides funcitonality for doing masked
                bitmap export and import.

********************************************************************************************/

class TI_GIFFilter : public MaskedFilter
{
    CC_DECLARE_DYNAMIC(TI_GIFFilter);
    
public:
    TI_GIFFilter();
    virtual BOOL Init();

    virtual INT32 HowCompatible( PathName& Filename, ADDR HeaderStart, UINT32 HeaderSize,
                               UINT32 FileSize );

    //Graham 5/11/97
    virtual BOOL IsDefaultDocRequired(const TCHAR* pcszPathName);

    virtual FilterType GetFilterType() const { return TI_GIF; }

    // Import related functions
    virtual BOOL ReadFromFile(OILBitmap* pOilBitmap);

    // This is the function for native/web files to use
    virtual BOOL ReadFromFile(OILBitmap* pOilBitmap, BaseCamelotFilter* pFilter,
                              CCLexFile* pFile, BOOL IsCompressed);

    // Function for web/native filters to use to write out the bitmap data to file
    virtual BOOL WriteBitmapToFile(KernelBitmap* pKernelBitmap, BaseCamelotFilter* pFilter,
                                   CCLexFile* pFile, INT32 Compression);

    // Function to write out a list of bitmaps to file
    virtual BOOL SaveExportBitmapsToFile(CCLexFile* pFile, PathName* pPath, BitmapExportParam* pParam,
                                         BOOL DontShowFileName = FALSE);

    void AlterPaletteContents( LPLOGPALETTE pPalette );

    // Check if this Bitmap filter can cope with saving at this Bpp/Colour depth
    virtual BOOL IsThisBppOk(UINT32 Bpp);

    // Public way of finding out how compatable the GIF filter thought the file was
    // We might want to bring in the Accusoft filter to help out.
    INT32 GetGifCompatibility();

    // Virtual overrides
    virtual UINT32 GetExportMsgID();
    virtual BOOL ShouldReuseExistingBitmaps(); 
    virtual void PostGetExportOptions(BitmapExportOptions* pOptions);

protected:

    // Import related functions
    virtual BitmapImportOptions* CreateImportOptions() const;

    // Export related functions 
    virtual BitmapExportOptions* CreateExportOptions() const;

    virtual OutputDIB* GetOutputDIB ( void );

    virtual UINT32 GetHintType(void);
    virtual BOOL GetExportOptions( BitmapExportOptions* pOptions );
    virtual void CleanUpAfterExport();
    virtual BOOL EndWriteToFile( );

    virtual BOOL WriteFileHeader(void);
    virtual BOOL WritePreFrame(void);
    virtual BOOL WritePreSecondPass(void);
    virtual BOOL WritePostOptimisedPalette(void);
    virtual BOOL WriteFrame(void);
    virtual BOOL WritePostFrame(void);
    virtual BOOL WriteFileEnd(void);

    virtual BOOL WriteBitmapToFile(KernelBitmap* pKernelBitmap, double Dpi);
    
    // this is used for the actual writing of the file
    static BOOL WriteDataToFile( BOOL End, UINT32 Bpp, UINT32 Compression);
    static BOOL WriteToFile ( CCLexFile* File, LPBITMAPINFO Info, LPBYTE Bits,
                              String_64* ProgressString = NULL);
    // This is the form used for direct saving bitmaps into the native/web file format
    static BOOL WriteToFile ( CCLexFile* File, LPBITMAPINFO Info, LPBYTE Bits,
                              BOOL Interlace, INT32 Transparent,
                              BaseCamelotFilter* pFilter = NULL);

    // The class we use for actually outputting the GIF data and converting from 32 to n bpps
    static OutputGIF DestGIF;

    // This is so we can remember what we thought of the GIF file.
    INT32 GIFHowCompatible;

    static FilterType s_FilterType;     // Type of filter in use (TI_GIF .. TI_GIF_TRANSINTER)

    BOOL m_DoingAnimation;      // flag for wether or not we are generating a GIF animation
    UINT32 m_AnimationFrame;        // the frame we are on in the animation

    // The string to display when exporting the second stage.
    UINT32 Export2ndStageMsgID;

    // When we load a GIF, if there is any x,y offset, then we use 
    UINT32 m_LeftOffset;
    UINT32 m_TopOffset;

    // Give the filter a chance to add in an offset that was contained in the bitmap definition
    virtual BOOL AddOffsetFromBitmap(DocCoord * pOffset);

    // Give the filter a chance to change the layer's flags given the newly loaded bitmap
    // Only applies if loading multiple bitmaps onto new layers.
    virtual BOOL SetFlagsFromBitmap(Layer * pLayer, KernelBitmap * pBitmap, UINT32 nBitmapToRead);

    // Give the filter a chance to change the animation properties given the newly loaded bitmaps
    // Only applies if loading multiple bitmaps onto new layers.
    virtual BOOL SetAnimationPropertiesFromLoaded(Spread * pSpread);

    // Normal action is to centre the object around the drop position. We do not want this
    // and so oeverride this
    virtual BOOL GetDragAndDropTranslation(ImportPosition* pPos, DocRect BoundsRect, Coord* Offset);

    GIFDisposalMethod m_PreviousMethod;
};

/********************************************************************************************

>   class AnimatedGIFImage : public ListItem

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    2/6/97
    Purpose:    Stores details on the GIF image which is part of an export animation sequence.
    
********************************************************************************************/

class AnimatedGIFImage : public ListItem
{
    CC_DECLARE_DYNCREATE( AnimatedGIFImage )

public:
    AnimatedGIFImage();
    ~AnimatedGIFImage();

    AnimatedGIFImage(const INT32 TransColour, const GIFDisposalMethod FrameRestore,
                     const CENTISECONDS FrameDelay,
                     const UINT32 LeftOffset, const UINT32 TopOffset,
                     const LPBITMAPINFO pInfo, const LPBYTE pBytes,
                     const LPBITMAPINFO pDiffInfo = NULL, const LPBYTE pDiffBytes = NULL);

    LPBITMAPINFO        GetOutputInfo() const   { return m_pInfo; }
    LPBYTE              GetOutputBits() const   { return m_pBytes; }

    void SetFrameRestore(const GIFDisposalMethod FrameRestore) { m_FrameRestore = FrameRestore; }
    
    INT32               GetTransColour() const  { return m_TransColour; }
    GIFDisposalMethod   GetFrameRestore() const { return m_FrameRestore; }
    CENTISECONDS        GetFrameDelay() const   { return m_FrameDelay; }
    UINT32              GetLeftOffset() const   { return m_LeftOffset; }
    UINT32              GetTopOffset()  const   { return m_TopOffset; }

protected:
    // Useful information about this frame in the image
    INT32               m_TransColour;
    GIFDisposalMethod   m_FrameRestore;
    CENTISECONDS        m_FrameDelay;

    UINT32              m_LeftOffset;
    UINT32              m_TopOffset;

    // This is a note of the bitmap image that needs outputting
    // It is a reference and so does not need cleaning up
    LPBITMAPINFO        m_pInfo;
    LPBYTE              m_pBytes;
    // This is the difference bitmap that may have been allocated
    // This does need cleaing up
    LPBITMAPINFO        m_pDiffInfo;
    LPBYTE              m_pDiffBytes;
};


#endif // INC_GIFFILTR

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