Introduction Class TWPCustomRTFControl Class TWPRichText Class TWPCustomRichText Class TDBWPRichText Class TWPCustomRtfEdit Class TWPPreview Class TWPRichTextLabel
Class TWPToolbar Class TWPToolButton Class TWPToolPanel Class TWPVertRuler Class TWPRuler Class TWPGutter
Class TTextHeader Class TWPRTFSectionProps Class TWPOwnedCharAttrInterface Class TWPStoredCharAttrInterface Class TWPAbstractCharAttrInterface Class TWPAbstractCharParAttrInterface Class TWPCursorCharAttrInterface Class TWPFoundTextAttrInterface Class TWPCurrentWritingmodeAttrInterface
Class TWPRTFReaderEx Class TWPRTFReader Class TWPRTFWriter Class TWPRTFWriterEx Class TWPToolsReaderWriter Class TWPTextWriter Class TWPHTMLWriter Class TWPTOOLSWriter Class TWPUNITextWriter Class TWPCustomTextWriter Class TWPTextReader Class TWPHTMLReader Class TWPTOOLSReader Class TWPUNITextReader Class TWPCustomTextReader
Class TWPRTFDataCollectionBase Class TWPRTFDataCollection Class TWPRTFDataBlock Class TWPRTFDataBlockEd Class TParagraph Class TWPTextStyle Class TWPORTFTextBox Class TWPObjectField Class TWPObject Class TWPRTFEngineBasis Class TWPRTFEngineEdit
Class TWPManageHeaderFooterDlg Class TWPPagePropDlg Class TWPParagraphBorderDlgEx Class TWPParagraphBorderDlg Class TWPTabDlgPrp Class TWPOneStyleDlg Class TWPBulletDlg Class TWPSymbolDlg Class TWPSymbolDlgEx Class TWPSpellCheckDlg Class TWPStringDlg Class TWPStyleDlg Class TWPCustomAttrDlg Class TWPSearchReplaceDlg Class TWPParagraphPropDlg Class TWPPreviewDlg Class TWPReportBandsDialog Class TWPTableDlg
Class TWPSuperMerge Class TDBWPEvalEngine Class TWPEvalEngine Class TWPTableProducer Class TWPBand Class TWPDataSetAbstractAdapter
Class TWPSvgXMLNode Class TWPXMLOneLevel Class TWPCustomXMLInterface Class TWPXMLInterface Class TWPLanguageControl Class TWPXMLTree Class TWPSVGXMLTree Class TWPCustomXMLTree
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Function TWPOCustomImage.CompressEx(aFileExtension:string; aCompressedStream:TMemoryStream; better_keep_data:Boolean; MetafilesToo:Boolean; dpi:Integer; pObj:TWPTextObj) : Boolean

Unit: WPOBJ_Image
Class: WPOBJ_Image.TWPOCustomImage

Parameters

  • aFileExtension:string
  • aCompressedStream:TMemoryStream
  • better_keep_data:Boolean
  • MetafilesToo:Boolean
  • dpi:Integer
  • pObj:TWPTextObj

Returns

The type of the result value is Boolean.

Description

This method can be used to compress an image. DPI will be used to convert metafiles and also if aFileExtension=''. In this case any image can be resampled and will be sdaved as JPEG.
This example resamples all images in the text: var i : Integer; lst : TWPTextObjList; better_keep_data : Boolean; mem : TMemoryStream; ext : String; begin lst := WPRichText1.CodeListTags(wpobjImage,'*ALL*', true); for i := 0 to lst.Count-1 do begin if (lst[i].IsImage) and (CompareText(lst[i].ObjRef.FileExtension,'JPEG')<>0) then begin mem := TMemoryStream.Create; better_keep_data := false; ext := ''; try (lst[i].ObjRef as TWPOCustomImage).CompressEx( ext, mem, better_keep_data, false, 200); if not better_keep_data then begin (lst[i].ObjRef as TWPOCustomImage).FileExtension := ext; (lst[i].ObjRef as TWPOCustomImage).LoadFromStream(mem); end; finally mem.Free; end; end; end; end;