Camelot: PreviewFilterPNG Class Reference

00773                                    : PNGFilter()
00774 {
00775     ImportMsgID = _R(IDS_IMPORTMSG_PNG);
00776     
00777     // Set it up so that it can neither Import or Export so that it does not appear in the
00778     // Filter menus.
00779     Flags.CanImport = FALSE;
00780     Flags.CanExport = FALSE;
00781     FilterID = FILTERID_PNG;        // FILTERID_PREVIEW_PNG;
00782 
00783     ExportRegion = NULL;
00784     ExportMsgID = _R(IDS_BUILDINGPREVIEW);
00785     ExportingMsgID = _R(IDS_BUILDINGPREVIEW);
00786 }

00835 {
00836     INT32 OldPreviewSize = PreviewFilter::PreviewBitmapSize;
00837     // Set the Preview to be just over an inch accross
00838     PreviewFilter::PreviewBitmapSize = 96000;
00839 
00840     // set ourselves up - this flags the BaseBitmapFilter to do resizing, which needs to be
00841     // done there because of Accusoft.
00842     SetPreviewBitmap(TRUE);
00843 
00844     // Export the Preview to the file by doing what our base class does
00845     BOOL ok = PNGFilter::DoExport(pOp, pFile, pPath, TheDocument, TRUE);
00846 
00847     // Set ourselves back
00848     SetPreviewBitmap(FALSE);
00849     // Set the Preview back to its default setting
00850     PreviewFilter::PreviewBitmapSize = OldPreviewSize;
00851 
00852     return ok;
00853 }

00868 {
00869     ERROR2IF(pOptions == NULL, FALSE, "NULL Args");
00870     ERROR3IF(!pOptions->IS_KIND_OF(PNGExportOptions), "pOptions isn't a PNGExportOptions");
00871 
00872     PNGExportOptions* pPNGOptions = (PNGExportOptions*)pOptions;
00873 
00874     // the depth we ask GDraw to render is always 32-bit, so we can get transparency
00875     // we have to convert for other formats when writing the actual bytes to the file
00876     SetDepthToRender(32);
00877 
00878     // We haven't written the header yet
00879     WrittenHeader = FALSE;
00880 
00882     // BitmapExportOptions
00883     //
00884 
00885     // this dpi will be used to scale the preview
00886     pPNGOptions->SetDPI(96.0);
00887 
00888     // the export depth of the preview is always 8
00889     pPNGOptions->SetDepth(8);
00890 
00891     // I'm fairly sure this isn't used for anything in WEBSTER-Martin-17/01/97
00892     //PreviewDither = ?;
00893     PreviewPalette = PAL_OPTIMISED;
00894 
00896     // MaskedFilterExportOptions
00897     //
00898 
00899     pPNGOptions->SetDither( XARADITHER_NONE );
00900 
00901     // Previews have an optimized palette
00902     PaletteType = PreviewPalette;
00903 //  pPNGOptions->SetPalette( (PALETTE)PreviewPalette );
00904 
00905     // Previews have no interlace/transparency
00906 //  pPNGOptions->SetMakeTransparent( FALSE );
00907     pPNGOptions->SetTransparencyIndex(-1);
00908     pPNGOptions->SetMakeInterlaced( FALSE );
00909 
00910     // We are a first pass render and not doing the mask, by default
00911     SecondPass = FALSE;
00912     DoingMask = FALSE;
00913 
00914     // Default will range from 0 to 4 types which correspond to the combinations of
00915     // on/off interlaced and on/off transparent
00916     Compression = 0;                // Previews have no interlace/transparency
00917 
00918     // Determine the filter type currently in use in Accusoft format
00919     FilterID = FILTERID_PNG;
00920     pPNGOptions->SetFilterType(PNG);
00921 
00922     return TRUE;
00923 }

00802 {
00803     // Get the OILFilter object
00804     pOILFilter = new PNGOILFilter(this);
00805     if (pOILFilter==NULL)
00806         return FALSE;
00807 
00808     // Load the description strings
00809     FilterName.Load(_R(IDS_PNG_FILTERNAME));
00810     FilterInfo.Load(_R(IDS_PNG_FILTERINFO));
00811 
00812     // All ok
00813     return TRUE;
00814 }


Public Member Functions
	PreviewFilterPNG ()
	Constructor for an PreviewFilterPNG object. The object should be initialised before use.
BOOL	Init ()
	Initialise an PreviewFilter object.
virtual BOOL	DoExport (Operation , CCLexFile , PathName , Document , BOOL)
	Do some set up before exporting so the BaseBitmapFilter base class knows it is really a preview. The BaseBitmapFilter can then do resizing as necessary.
Protected Member Functions
virtual BOOL	GetExportOptions (BitmapExportOptions *pOptions)
	Override base class so we don't put up a dialog but still provide fixed options for preview bitmap filters. Notes: See BaseBitmapFilter for interface details.
Private Member Functions
	CC_DECLARE_DYNAMIC (PreviewFilterPNG)

PreviewFilterPNG Class Reference

Public Member Functions

Protected Member Functions

Private Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation