prvwflt.h

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// $Id: prvwflt.h 809 2006-04-13 11:28:42Z phil $
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----------------------------------

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 */

// The preview filters. Basically the same as the normal filter but never puts
// a dialog up for the export options - always provides sensible defaults for
// the preview.


#ifndef INC_PREVIEWFILTERS
#define INC_PREVIEWFILTERS

#include "bmpfiltr.h"   // for BMP preview
#include "giffiltr.h"   // for GIF preview
#include "exjpeg.h"     // for JPEG preview
#include "pngfiltr.h"   // for, you guessed it.. PNG preview

// Forward definitions.
class AIEPSRenderRegion;

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

>   class PreviewFilter : public Filter

    Author:     Martin_Bell (Xara Group Ltd) <camelotdev@xara.com>
    Created:    01/01/97
    Purpose:    The filter's sole purpose is to hold the PreviewBitmapSize static. It can
                not import, export or appear on a menu.
    Notes:      20/01/97
                This class used to be derived from AccusoftFilters (but prob never should 
                have been). All other preview filters were derived from this, but are now
                derived from their respectively similar file filter i.e. PreviewFilterBMP
                is derived from BMPFilter. This causes a problem with FILTERIDs cos
                FILTERID_PREVIEW_TIFF is defined to be the same as FILTERID_PREVIEW obviously
                this won't work now that the filters are not all derived from PreviewFilter

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

class PreviewFilter : public Filter
{
    CC_DECLARE_DYNAMIC(PreviewFilter);
    
public:
    PreviewFilter();
    BOOL Init();

    // we will always be incompatible
    virtual INT32 HowCompatible( PathName&, ADDR, UINT32, UINT32 );

    // we will never import
    virtual BOOL DoImport(SelOperation*, CCLexFile*, Document*, 
                          BOOL AutoChosen = FALSE, ImportPosition *Pos = NULL,
                           KernelBitmap** ppImportedBitmap = NULL, 
                           DocCoord* pPosTranslate = NULL, String_256* = NULL);

    // we will never export
    virtual BOOL DoExport(Operation*, CCLexFile*, PathName*, Document*, BOOL);

public:
    // The Size of the Preview Bitmap Preference
    static MILLIPOINT PreviewBitmapSize;

};

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

>   class PreviewFilterBMP : public BMPFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    24/6/95
    Purpose:    The filter will save out the BMP Preview Bitmap. Overrides GetExportOptions
                so dialogs are not put up but returns preview export options.

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

class PreviewFilterBMP : public BMPFilter
{
    CC_DECLARE_DYNAMIC(PreviewFilterBMP);
    
public:
    PreviewFilterBMP();
    BOOL Init();
    virtual BOOL DoExport(Operation*, CCLexFile*, PathName*, Document*, BOOL);

protected:
    virtual BOOL GetExportOptions(BitmapExportOptions* pOptions);
};

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

>   class PreviewFilterGIF : public TI_GIFFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    24/6/95
    Purpose:    The filter will save out the GIF Preview Bitmap. Overrides GetExportOptions
                so dialogs are not put up but returns preview export options.

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

class PreviewFilterGIF : public TI_GIFFilter
{
    CC_DECLARE_DYNAMIC(PreviewFilterGIF);
    
public:
    PreviewFilterGIF();
    BOOL Init();
    virtual BOOL DoExport(Operation*, CCLexFile*, PathName*, Document*, BOOL);

protected:
    virtual BOOL GetExportOptions(BitmapExportOptions* pOptions);
};


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

>   class PreviewFilterJPEG : public JPEGExportFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    24/6/95
    Purpose:    The filter will save out the JPEG Preview Bitmap. Overrides GetExportOptions
                so dialogs are not put up but returns preview export options.
    Note:       22/01/97    Preview filters can generally import as well now (if their base 
                class can) but obviously this one can't - use JPEGImportFilter instead.

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

class PreviewFilterJPEG : public JPEGExportFilter
{
    CC_DECLARE_MEMDUMP(PreviewFilterJPEG);
    
public:
    PreviewFilterJPEG();
    BOOL Init();
    virtual BOOL DoExport(Operation*, CCLexFile*, PathName*, Document*, BOOL);

protected:
    virtual BOOL GetExportOptions(BitmapExportOptions* pOptions);
};


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

>   class PreviewFilterPNG : public PNGFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    24/6/95
    Purpose:    The filter will save out the PNG Preview Bitmap. Overrides GetExportOptions
                so dialogs are not put up but returns preview export options.

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

class PreviewFilterPNG : public PNGFilter
{
    CC_DECLARE_DYNAMIC(PreviewFilterPNG);
    
public:
    PreviewFilterPNG();
    BOOL Init();
    virtual BOOL DoExport(Operation*, CCLexFile*, PathName*, Document*, BOOL);

protected:
    virtual BOOL GetExportOptions(BitmapExportOptions* pOptions);
};

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

>   class ThumbnailFilterPNG : public PreviewFilterPNG

    Author:     Stefan_Stoykov (Xara Group Ltd) <camelotdev@xara.com>
    Created:    10/6/97
    Purpose:    The filter will save out the PNG Thumbnail Bitmap. Overrides DoExport
                so dialogs are not put up but returns preview export options.

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

class ThumbnailFilterPNG : public PreviewFilterPNG
{
    CC_DECLARE_DYNAMIC(ThumbnailFilterPNG);
    
public:
    ThumbnailFilterPNG() : PreviewFilterPNG() {};

    virtual BOOL DoExport(Operation* pOp, CCLexFile* pFile, PathName* pPath, 
                                Document* TheDocument, BOOL ShowOptions);
};

#endif  // INC_PREVIEWFILTERS

---