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zintbarcode.prg
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1692 lines (1352 loc) · 48.2 KB
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******************************************************
*
* ZintBarcode
*
* A VFP connector to the Zint Barcode Library
*
* Check documentation for usage and terms
*
*
#DEFINE SAFETHIS ASSERT !USED("This") AND TYPE("This") == "O"
#DEFINE ZBVFPSIG "~zbvfp_"
#DEFINE ZINT_WARNINGS 4
#DEFINE DEF_LIB_PNG 1
#DEFINE DEF_LIB_GS1SYNTAXENGINE 2
* install the classes
SET PROCEDURE TO (SYS(16)) ADDITIVE
* and path to dependencies
SET PATH TO (ADDBS(JUSTPATH(SYS(16))) + "external") ADDITIVE
* instantiate the library and we're ready to go
CREATEOBJECT("ZintLibrary")
*
* ZintBarcode
* a class to produce barcodes images
*
DEFINE CLASS ZintBarcode AS Custom
* manage storage
ADD OBJECT PROTECTED ImageFiles AS Collection
PROTECTED Symbol, ZStructure, ZVersion, ZResult, TempFolder, OwnFolder, SingleFile, CmykModel, DefaultImageFormat
PROTECTED OverlayImage, OverlayPosition, OverlayWidth, OverlayHeight, OverlayMargin, OverlayIsometric
* the address of the Zint symbol structure
Symbol = 0
* members of a Zint symbol structure
ZStructure = .NULL.
* the version of Zint library
ZVersion = 0
* the result of the last Zint operation
ZResult = -1
* location of temporary images (used to set the ControlSource of controls in forms and reports)
TempFolder = ""
OwnFolder = .F.
SingleFile = .F.
* set and get colors in CMYK model
CmykModel = 0
* overlay image and position
OverlayImage = ""
OverlayPosition = "C"
OverlayWidth = 0
OverlayHeight = 0
OverlayMargin = 0
OverlayIsometric = .T.
* default image format (by extension)
DefaultImageFormat = "gif"
_MemberData = '<VFPData>' + ;
'<memberdata name="getversion" type="method" display="GetVersion" />' + ;
'<memberdata name="getlastresult" type="method" display="GetLastResult" />' + ;
'<memberdata name="getgeneratedstatus" type="method" display="GetGeneratedStatus" />' + ;
'<memberdata name="encodesave" type="method" display="EncodeSave" />' + ;
'<memberdata name="encode" type="method" display="Encode" />' + ;
'<memberdata name="save" type="method" display="Save" />' + ;
'<memberdata name="imagefile" type="method" display="ImageFile" />' + ;
'<memberdata name="dynamicsettings" type="method" display="DynamicSettings" />' + ;
'<memberdata name="reset" type="method" display="Reset" />' + ;
'<memberdata name="issupported" type="method" display="IsSupported" />' + ;
'<memberdata name="librarysupport" type="method" display="LibrarySupport" />' + ;
'<memberdata name="getsinglefile" type="method" display="GetSingleFile" />' + ;
'<memberdata name="setsinglefile" type="method" display="SetSingleFile" />' + ;
'<memberdata name="getdefaultimageformat" type="method" display="GetDefaultImageFormat" />' + ;
'<memberdata name="setdefaultimageformat" type="method" display="SetDefaultImageFormat" />' + ;
'<memberdata name="getoverlay" type="method" display="GetOverlay" />' + ;
'<memberdata name="setoverlay" type="method" display="SetOverlay" />' + ;
'<memberdata name="getoverlayposition" type="method" display="GetOverlayPosition" />' + ;
'<memberdata name="setoverlayposition" type="method" display="SetOverlayPosition" />' + ;
'<memberdata name="getoverlaywidth" type="method" display="GetOverlayWidth" />' + ;
'<memberdata name="setoverlaywidth" type="method" display="SetOverlayWidth" />' + ;
'<memberdata name="getoverlayheight" type="method" display="GetOverlayHeight" />' + ;
'<memberdata name="setoverlayheight" type="method" display="SetOverlayHeight" />' + ;
'<memberdata name="getoverlaymargin" type="method" display="GetOverlayMargin" />' + ;
'<memberdata name="setoverlaymargin" type="method" display="SetOverlayMargin" />' + ;
'<memberdata name="getoverlayisometric" type="method" display="GetOverlayIsometric" />' + ;
'<memberdata name="setoverlayisometric" type="method" display="SetOverlayIsometric" />' + ;
'<memberdata name="getcmykmodel" type="method" display="GetCmykModel" />' + ;
'<memberdata name="setcmykmodel" type="method" display="SetCmykModel" />' + ;
'<memberdata name="getsymbology" type="method" display="GetSymbology" />' + ;
'<memberdata name="setsymbology" type="method" display="SetSymbology" />' + ;
'<memberdata name="getheight" type="method" display="GetHeight" />' + ;
'<memberdata name="setheight" type="method" display="SetHeight" />' + ;
'<memberdata name="getwhitespacewidth" type="method" display="GetWhitespaceWidth" />' + ;
'<memberdata name="setwhitespacewidth" type="method" display="SetWhitespaceWidth" />' + ;
'<memberdata name="getwhitespaceheight" type="method" display="GetWhitespaceHeight" />' + ;
'<memberdata name="setwhitespaceheight" type="method" display="SetWhitespaceHeight" />' + ;
'<memberdata name="getborderwidth" type="method" display="GetBorderWidth" />' + ;
'<memberdata name="setborderwidth" type="method" display="SetBorderWidth" />' + ;
'<memberdata name="getoutputoptions" type="method" display="GetOutputOptions" />' + ;
'<memberdata name="setoutputoptions" type="method" display="SetOutputOptions" />' + ;
'<memberdata name="getfgcolour" type="method" display="GetFGColour" />' + ;
'<memberdata name="setfgcolour" type="method" display="SetFGColour" />' + ;
'<memberdata name="getbgcolour" type="method" display="GetBGColour" />' + ;
'<memberdata name="setbgcolour" type="method" display="SetBGColour" />' + ;
'<memberdata name="getoutfile" type="method" display="GetOutfile" />' + ;
'<memberdata name="setoutfile" type="method" display="SetOutfile" />' + ;
'<memberdata name="getprimary" type="method" display="GetPrimary" />' + ;
'<memberdata name="setprimary" type="method" display="SetPrimary" />' + ;
'<memberdata name="getscale" type="method" display="GetScale" />' + ;
'<memberdata name="setscale" type="method" display="SetScale" />' + ;
'<memberdata name="getoption" type="method" display="GetOption" />' + ;
'<memberdata name="setoption" type="method" display="SetOption" />' + ;
'<memberdata name="getshowhumanreadabletext" type="method" display="GetShowHumanReadableText" />' + ;
'<memberdata name="setshowhumanreadabletext" type="method" display="SetShowHumanReadableText" />' + ;
'<memberdata name="getfontsize" type="method" display="GetFontSize" />' + ;
'<memberdata name="setfontsize" type="method" display="SetFontSize" />' + ;
'<memberdata name="getinputmode" type="method" display="GetInputMode" />' + ;
'<memberdata name="setinputmode" type="method" display="SetInputMode" />' + ;
'<memberdata name="geteci" type="method" display="GetECI" />' + ;
'<memberdata name="seteci" type="method" display="SetECI" />' + ;
'<memberdata name="getdotspermm" type="method" display="GetDotsPerMM" />' + ;
'<memberdata name="setdotspermm" type="method" display="SetDotsPerMM" />' + ;
'<memberdata name="getdotsize" type="method" display="GetDotSize" />' + ;
'<memberdata name="setdotsize" type="method" display="SetDotSize" />' + ;
'<memberdata name="gettextgap" type="method" display="GetTextGap" />' + ;
'<memberdata name="settextgap" type="method" display="SetTextGap" />' + ;
'<memberdata name="getguarddescent" type="method" display="GetGuardDescent" />' + ;
'<memberdata name="setguarddescent" type="method" display="SetGuardDescent" />' + ;
'<memberdata name="gettext" type="method" display="GetText" />' + ;
'<memberdata name="gettextlength" type="method" display="GetTextLength" />' + ;
'<memberdata name="getrows" type="method" display="GetRows" />' + ;
'<memberdata name="getwidth" type="method" display="GetWidth" />' + ;
'<memberdata name="getencodeddata" type="method" display="GetEncodedData" />' + ;
'<memberdata name="getrowheight" type="method" display="GetRowHeight" />' + ;
'<memberdata name="geterrortext" type="method" display="GetErrorText" />' + ;
'<memberdata name="getbitmappointer" type="method" display="GetBitmapPointer" />' + ;
'<memberdata name="getbitmapwidth" type="method" display="GetBitmapWidth" />' + ;
'<memberdata name="getbitmapheight" type="method" display="GetBitmapHeight" />' + ;
'<memberdata name="getalphamappointer" type="method" display="GetAlphamapPointer" />' + ;
'<memberdata name="getbitmapbytelength" type="method" display="GetBitmapByteLength" />' + ;
'<memberdata name="getvectorpointer" type="method" display="GetVectorPointer" />' + ;
'<memberdata name="getdebug" type="method" display="GetDebug" />' + ;
'<memberdata name="setdebug" type="method" display="SetDebug" />' + ;
'<memberdata name="getwarnlevel" type="method" display="GetWarnLevel" />' + ;
'<memberdata name="setwarnlevel" type="method" display="SetWarnLevel" />' + ;
'<memberdata name="getmemfile" type="method" display="GetMemFile" />' + ;
'</VFPData>'
PROCEDURE Init
* get a Zint symbol structure from the Zint library
This.Symbol = ZBarcode_Create()
* get the version of the Zint library
This.ZVersion = ZBarcode_Version()
This.ZStructure = CREATEOBJECT("ZintStructure", This.GetVersion(.T.))
* create a folder for temporary images, or use the general temporary folder if that is not possible
LOCAL Retries AS Integer
m.Retries = 100
DO WHILE m.Retries > 0 AND !This.OwnFolder
TRY
This.TempFolder = ADDBS(SYS(2023)) + SYS(3)
MKDIR (This.TempFolder)
This.OwnFolder = .T.
CATCH
m.Retries = m.Retries - 1
ENDTRY
ENDDO
IF !This.OwnFolder
This.TempFolder = SYS(2023)
ENDIF
ENDPROC
PROCEDURE Destroy
SAFETHIS
* on exit, free the Zint symbol structure
ZBarcode_Delete(This.Symbol)
* and try to delete all temporary files and temporary folder, if we created one
IF This.OwnFolder
TRY
ERASE (ADDBS(This.TempFolder) + "*.*")
RMDIR (This.TempFolder)
CATCH
ENDTRY
ELSE
LOCAL Filename AS String
FOR EACH m.Filename IN This.ImageFiles
TRY
ERASE (m.Filename)
CATCH
ENDTRY
ENDFOR
ENDIF
ENDPROC
* returns Zint Version
PROCEDURE GetVersion (MajorMinor AS Logical) AS String
IF m.MajorMinor
RETURN LTRIM(CHRTRAN(TRANSFORM(FLOOR(This.ZVersion / 100), "@R 99-99"), "-", "."))
ELSE
RETURN LTRIM(CHRTRAN(TRANSFORM(This.ZVersion, "@R 99-99-99"), "-", "."))
ENDIF
ENDPROC
* returns last result of an encoding / saving operation
PROCEDURE GetLastResult () AS Integer
RETURN This.ZResult
ENDPROC
* returns generated status
PROCEDURE GetGeneratedStatus () AS Logical
RETURN BETWEEN(This.ZResult, 0, ZINT_WARNINGS)
ENDPROC
* prepare and save a barcode to a file, at a given angle (0-90-180-270)
PROCEDURE EncodeSave (InputData AS String, Filename AS String, Angle AS Integer) AS Integer
SAFETHIS
ZBarcode_Clear(This.Symbol)
IF PCOUNT() > 1 AND ! EMPTY(m.Filename)
This.SetOutfile(m.Filename)
ENDIF
This.ZResult = ZBarcode_Encode_And_Print(This.Symbol, m.InputData, LEN(m.InputData), EVL(m.Angle, 0))
IF This.ZResult <= ZINT_WARNINGS AND IIF(VARTYPE(This.OverlayImage) == "C", !EMPTY(This.OverlayImage), !ISNULL(This.OverlayImage))
This.PlaceOverlayImage()
ENDIF
RETURN This.ZResult
ENDPROC
* prepare and render a barcode
PROCEDURE Encode (InputData AS String, Filename AS String) AS Integer
SAFETHIS
IF PCOUNT() > 1 AND !EMPTY(m.Filename)
This.SetOutfile(m.Filename)
ENDIF
This.ZResult = ZBarcode_Encode(This.Symbol, m.InputData, LEN(m.InputData))
RETURN This.ZResult
ENDPROC
* save a prepared barcode to a file at a given angle (0-90-180-270)
PROCEDURE Save (Angle AS Integer) AS Integer
SAFETHIS
This.ZResult = ZBarcode_Print(This.Symbol, EVL(m.Angle, 0))
RETURN This.ZResult
ENDPROC
* render a barcode and save it to a temporary file, and return its filename
* image file format is set as an extension
PROCEDURE ImageFile (InputData AS String, ImageFormat AS String, Angle AS Integer) AS String
SAFETHIS
LOCAL Filename AS String
LOCAL Extension AS String
LOCAL ARRAY CheckFile(1)
m.Extension = EVL(m.ImageFormat, This.DefaultImageFormat)
IF This.SingleFile AND This.ImageFiles.Count > 0
m.Filename = This.ImageFiles(1)
ELSE
m.Filename = ADDBS(This.TempFolder) + FORCEEXT(ZBVFPSIG + SYS(3), m.Extension)
DO WHILE ADIR(m.CheckFile, m.Filename) > 0
m.Filename = ADDBS(This.TempFolder) + FORCEEXT(ZBVFPSIG + SYS(3), m.Extension)
ENDDO
This.ImageFiles.Add(m.Filename)
ENDIF
* have other settings dynamically prepared
This.DynamicSettings(m.InputData)
IF This.EncodeSave(m.InputData, m.Filename, m.Angle) <= ZINT_WARNINGS
RETURN m.Filename
* the filename can be used as a ControlSource or Picture in controls
ELSE
RETURN ""
* error should be checked by .GetErrorText() or .GetLastResult()
ENDIF
ENDPROC
* places an overlay image on the image rendered at OutFile
HIDDEN PROCEDURE PlaceOverlayImage () AS Void
* test if GdiPlusX library is available, do not proceed if not
IF !PEMSTATUS(_Screen, "System", 5) OR !PEMSTATUS(_Screen.System, "Drawing", 5)
RETURN
ENDIF
LOCAL Drawing AS xfcDrawing
m.Drawing = _Screen.System.Drawing
LOCAL RenderedBarcode AS String
LOCAL OutFileExtension AS String
LOCAL Encoder AS xfcImageFormat
* choose the format - note that not all image formats may be available
m.RenderedBarcode = This.GetOutfile()
m.OutFileExtension = UPPER(JUSTEXT(m.RenderedBarcode))
DO CASE
CASE m.OutFileExtension == "GIF"
m.Encoder = m.Drawing.Imaging.ImageFormat.Gif
CASE m.OutFileExtension == "PNG"
m.Encoder = m.Drawing.Imaging.ImageFormat.Png
CASE m.OutFileExtension == "BMP"
m.Encoder = m.Drawing.Imaging.ImageFormat.Bmp
CASE m.OutFileExtension == "JPG"
m.Encoder = m.Drawing.Imaging.ImageFormat.Jpeg
OTHERWISE
RETURN && if not supported, return the barcode without the overlaying
ENDCASE
* objects/attributes of the base image
LOCAL ImgBase AS xfcImage
LOCAL BaseOffsetX AS Integer
LOCAL BaseOffsetY AS Integer
LOCAL RectBase AS xfcRectangle
* objects/attributes of the overlay image
LOCAL ImgOverlay AS xfcImage
LOCAL OvrOffsetX AS Integer
LOCAL OvrOffsetY AS Integer
LOCAL OvrWidth AS Integer
LOCAL OvrHeight AS Integer
LOCAL OvrBox AS Logical
LOCAL RectOverlay AS xfcRectangle
LOCAL ResizeFactor AS Double
LOCAL ResizeFactorX AS Double
LOCAL ResizeFactorY AS Double
LOCAL ResizeOffsetX AS Integer
LOCAL ResizeOffsetY AS Integer
* objects/attributes of the final image
LOCAL ImgFinal AS xfcBitmap
LOCAL ImgGraphic AS xfcGraphics
LOCAL ImgColor AS xfcColor
LOCAL ExtraWidth AS Integer
LOCAL ExtraHeight AS Integer
* get the rendered barcode (it will be the base for the new image) and the overlay image
m.ImgBase = m.Drawing.Image.FromFile(m.RenderedBarcode)
DO CASE
CASE VARTYPE(This.OverlayImage) == "C"
m.ImgOverlay = m.Drawing.Image.FromFile(This.OverlayImage)
CASE !EMPTY(This.OverlayImage.PictureVal)
m.ImgOverlay = m.Drawing.Image.FromVarbinary(This.OverlayImage.PictureVal)
OTHERWISE
m.ImgOverlay = m.Drawing.Image.FromFile(This.OverlayImage.Picture)
ENDCASE
* forget about overlaying if the overlay image can not be loaded into an object
IF ISNULL(m.ImgOverlay)
RETURN
ENDIF
* overlay image may be inserted inside a box
IF EMPTY(This.OverlayWidth) AND EMPTY(This.OverlayHeight)
m.OvrBox = .F.
m.OvrHeight = m.ImgOverlay.Height
m.OvrWidth = m.ImgOverlay.Width
ELSE
m.OvrBox = .T.
m.OvrHeight = This.OverlayHeight
m.OvrWidth = This.OverlayWidth
ENDIF
* if the overlay image is not centered
IF !This.OverlayPosition == "C"
* the barcode width and height will increase to place the overlay in one corner
m.ExtraHeight = INT(m.OvrHeight / 2)
m.ExtraWidth = INT(m.OvrWidth / 2)
* depending on the corner on which the overlay will be placed,
* the offset position of both the base image and the overlay image
* may require to be set
DO CASE
CASE This.OverlayPosition == "TL" && top left
* overlay
* base
m.OvrOffsetX = 0
m.OvrOffsetY = 0
m.BaseOffsetX = m.ExtraWidth
m.BaseOffsetY = m.ExtraHeight
CASE This.OverlayPosition == "TR" && top right
* overlay
* base
m.OvrOffsetX = m.ImgBase.Width - m.ExtraWidth
m.OvrOffsetY = 0
m.BaseOffsetX = 0
m.BaseOffsetY = m.ExtraHeight
CASE This.OverlayPosition == "BL" && bottom left
* base
* overlay
m.OvrOffsetX = 0
m.OvrOffsetY = m.ImgBase.Height - m.ExtraHeight
m.BaseOffsetX = m.ExtraWidth
m.BaseOffsetY = 0
CASE This.OverlayPosition == "BR" && bottom right
* base
* overlay
m.OvrOffsetX = m.ImgBase.Width - m.ExtraWidth
m.OvrOffsetY = m.ImgBase.Height - m.ExtraHeight
m.BaseOffsetX = 0
m.BaseOffsetY = 0
OTHERWISE
RETURN && placement not recognized, no changes to the rendered barcode
ENDCASE
ELSE
m.BaseOffsetX = 0
m.BaseOffsetY = 0
m.ExtraHeight = 0
m.ExtraWidth = 0
* if centered, the rendered barcode dimension will not change
* and the overlay will move to the center
m.OvrOffsetX = INT(m.ImgBase.Width / 2) - INT(m.OvrWidth / 2)
m.OvrOffsetY = INT(m.ImgBase.Height / 2) - INT(m.OvrHeight / 2)
ENDIF
* the new final image size
m.ImgFinal = m.Drawing.Bitmap.New(m.ImgBase.Width + m.ExtraWidth, m.ImgBase.Height + m.ExtraHeight)
* prepare an extended graphic canvas
m.ImgGraphic = m.Drawing.Graphics.FromImage(m.ImgFinal)
m.ImgColor = m.Drawing.Color.FromRGB(This.GetBGColour(.T.))
m.ImgGraphic.Clear(m.ImgColor)
* place the base image at its calculated offset
m.RectBase = m.Drawing.Rectangle.New(m.BaseOffsetX, m.BaseOffsetY, m.ImgBase.Width, m.ImgBase.Height)
m.ImgGraphic.DrawImage(m.ImgBase, m.RectBase)
* place the overlay image at its calculated offset
IF !m.OvrBox
m.RectOverlay = m.Drawing.Rectangle.New(m.OvrOffsetX, m.OvrOffsetY, m.OvrWidth, m.OvrHeight)
m.ImgGraphic.DrawImage(m.ImgOverlay, m.RectOverlay)
ELSE
* in a box, start by clearing it
m.ImgGraphic.FillRectangle(m.Drawing.SolidBrush.New(m.ImgColor), m.OvrOffsetX, m.OvrOffsetY, m.OvrWidth, m.OvrHeight)
* if needed, make room for a margin
m.OvrOffsetX = m.OvrOffsetX + This.OverlayMargin
m.OvrOffsetY = m.OvrOffsetY + This.OverlayMargin
m.OvrWidth = m.OvrWidth - This.OverlayMargin * 2
m.OvrHeight = m.OvrHeight - This.OverlayMargin * 2
* redimension the image while retaining proportions, if isometric
IF This.OverlayIsometric
* the target dimensions
m.ResizeOffsetX = m.OvrWidth
m.ResizeOffsetY = m.OvrHeight
* get the dominant resizing factor (width or height)
m.ResizeFactorX = m.OvrWidth / m.ImgOverlay.Width
m.ResizeFactorY = m.OvrHeight / m.ImgOverlay.Height
m.ResizeFactor = MIN(m.ResizeFactorX, m.ResizeFactorY)
* new dimensions
m.OvrHeight = m.ImgOverlay.Height * m.ResizeFactor
m.OvrWidth = m.ImgOverlay.Width * m.ResizeFactor
* and adjust to the new empty space, if any
m.OvrOffsetX = m.OvrOffsetX + (m.ResizeOffsetX - m.OvrWidth) / 2
m.OvrOffsetY = m.OvrOffsetY + (m.ResizeOffsetY - m.OvrHeight) / 2
ENDIF
* resize the image with the best quality possible
m.RectOverlay = m.Drawing.Rectangle.New(m.OvrOffsetX, m.OvrOffsetY, m.OvrWidth, m.OvrHeight)
m.ImgGraphic.SmoothingMode = m.Drawing.Drawing2d.SmoothingMode.Highquality
m.ImgGraphic.InterpolationMode = m.Drawing.Drawing2d.Interpolationmode.Highqualitybicubic
* draw it
m.ImgGraphic.DrawImage(m.ImgOverlay, m.RectOverlay)
ENDIF
* overwrite the output file with the new overlayed image, and done
m.ImgBase = .NULL.
m.ImgFinal.Save(m.RenderedBarcode, m.Encoder)
ENDFUNC
* from CMYK to RGB color
HIDDEN FUNCTION CmykToRgb (CMYK AS String, DefaultRGB AS Integer) AS Integer
SAFETHIS
LOCAL Black AS Integer
LOCAL ARRAY CMYKParts[4]
IF ALINES(m.CMYKParts, m.CMYK, 1, ',') == 4
m.Black = (1 - VAL(m.CMYKParts[4]) / 100)
RETURN BITOR(BITAND(ROUND(255 * (1 - VAL(m.CMYKParts[1]) / 100) * m.Black, 0), 0xFF), ;
BITLSHIFT(BITAND(ROUND(255 * (1 - VAL(m.CMYKParts[2]) / 100) * m.Black, 0), 0xFF), 8), ;
BITLSHIFT(BITAND(ROUND(255 * (1 - VAL(m.CMYKParts[3]) / 100) * m.Black, 0), 0xFF), 16))
ELSE
RETURN m.DefaultRGB
ENDIF
ENDFUNC
* from RGB to CMYK color
HIDDEN FUNCTION RgbToCmyk (RGBCode AS Integer) AS String
SAFETHIS
LOCAL Red AS Integer, Green AS Integer, Blue AS Integer, Black AS Integer
m.Red = BITAND(m.RGBCode, 0xFF) / 255
m.Green = BITAND(BITRSHIFT(m.RGBCode, 8), 0xFF) / 255
m.Blue = BITAND(BITRSHIFT(m.RGBCode, 16), 0xFF) / 255
m.Black = 1 - MAX(m.Red, m.Green, m.Blue)
IF m.Black == 1
RETURN "0,0,0,100"
ELSE
RETURN CHRTRAN(STR(ROUND((1 - m.Red - m.Black) / (1 - m.Black) * 100, 0)) + "," + ;
STR(ROUND((1 - m.Green - m.Black) / (1 - m.Black) * 100, 0)) + "," + ;
STR(ROUND((1 - m.Blue - m.Black) / (1 - m.Black) * 100, 0)) + "," + ;
STR(ROUND(m.Black * 100, 0)), " ", "")
ENDIF
ENDFUNC
* a placeholder for dynamic settings (subclass ZintBarcode to use this feature)
PROCEDURE DynamicSettings (InputData AS String)
ENDPROC
* reset the Symbol structure to its defaults
PROCEDURE Reset ()
SAFETHIS
ZBarcode_Clear(This.Symbol)
LOCAL ZB AS ZintBarcode
m.ZB = CREATEOBJECT("ZintBarCode")
This.SetSymbology(m.ZB.GetSymbology())
This.SetHeight(m.ZB.GetHeight())
This.SetWhitespaceWidth(m.ZB.GetWhitespaceWidth())
This.SetWhitespaceHeight(m.ZB.GetWhitespaceHeight())
This.SetBorderWidth(m.ZB.GetBorderWidth())
This.SetOutputOptions(m.ZB.GetOutputOptions())
This.SetFGColour(m.ZB.GetFGColour())
This.SetBGColour(m.ZB.GetBGColour())
This.SetOutfile(m.ZB.GetOutfile())
This.SetPrimary(m.ZB.GetPrimary())
This.SetScale(m.ZB.GetScale())
This.SetOption(1, m.ZB.GetOption(1))
This.SetOption(2, m.ZB.GetOption(2))
This.SetOption(3, m.ZB.GetOption(3))
This.SetShowHumanReadableText(m.ZB.GetShowHumanReadableText())
This.SetInputMode(m.ZB.GetInputMode())
This.SetECI(m.ZB.GetECI())
This.SetDotsPerMM(m.ZB.GetDotsPerMM())
This.SetDotSize(m.ZB.GetDotSize())
This.SetTextGap(m.ZB.GetTextGap())
This.SetGuardDescent(m.ZB.GetGuardDescent())
ENDPROC
* check if a barcode symbology, or a feature of a barcode symbology, is supported by the library
PROCEDURE IsSupported (Symbology AS Integer, Feature AS Integer) AS Logical
SAFETHIS
IF PCOUNT() > 1
RETURN ZBarcode_Cap(m.Symbology, m.Feature) == m.Feature
ELSE
RETURN ZBarcode_ValidID(m.Symbology) != 0
ENDIF
ENDPROC
* check if a generic feature of the library is available (use LIB_ZINT_* enumeration members)
PROCEDURE LibrarySupport (Feature AS Integer) AS Logical
SAFETHIS
LOCAL Supported AS Logical
m.Supported = .NULL. && meaning "we don't know..."
DO CASE
CASE m.Feature == DEF_LIB_PNG
TRY
m.Supported = ZBarcode_NoPng() == 0
CATCH
ENDTRY
CASE m.Feature == DEF_LIB_GS1SYNTAXENGINE
TRY
m.Supported = ZBarcode_HaveGS1SyntaxEngine() == 1
CATCH
m.Supported = .F.
ENDTRY
ENDCASE
RETURN m.Supported
ENDPROC
* the SingleFile property determines if the ControlSource requires a single file (for instance, in a form)
* or different files (for several barcodes in a page report)
PROCEDURE GetSingleFile () AS Logical
SAFETHIS
RETURN This.SingleFile
ENDPROC
PROCEDURE SetSingleFile (SingleFile AS Logical)
This.SingleFile = m.SingleFile
ENDPROC
* the DefaultImageFormat property holds the default image format when not specified in methods' parameters
FUNCTION GetDefaultImageFormat () AS String
SAFETHIS
RETURN This.DefaultImageFormat
ENDFUNC
PROCEDURE SetDefaultImageFormat (DefaultImageFormat AS String)
This.DefaultImageFormat = m.DefaultImageFormat
ENDPROC
* the CmykModel property determines if colors are transformed according to the CMYK model
PROCEDURE GetCmykModel () AS Integer
SAFETHIS
RETURN This.CmykModel
ENDPROC
PROCEDURE SetCmykModel (CmykModel AS Integer)
This.CmykModel = MAX(MIN(INT(m.CmykModel), IIF(This.ZVersion >= 21300, 2, 0)), 0)
ENDPROC
* an overlay image may be placed over the resulting barcode at the center or at one of the barcode corners
PROCEDURE GetOverlay () AS StringOrImage
SAFETHIS
RETURN This.OverlayImage
ENDPROC
PROCEDURE SetOverlay (ImageFile AS StringOrImage)
This.OverlayImage = m.ImageFile
ENDPROC
* overlay positions: C, TL, TR, BL, BR
PROCEDURE GetOverlayPosition () AS String
SAFETHIS
RETURN This.OverlayPosition
ENDPROC
PROCEDURE SetOverlayPosition (OverlayPosition AS String)
This.OverlayPosition = UPPER(m.OverlayPosition)
ENDPROC
* overlay width, height, and margin
PROCEDURE GetOverlayWidth () AS Integer
SAFETHIS
RETURN This.OverlayWidth
ENDPROC
PROCEDURE SetOverlayWidth (OverlayWidth AS Integer)
This.OverlayWidth = m.OverlayWidth
ENDPROC
PROCEDURE GetOverlayHeight () AS Integer
SAFETHIS
RETURN This.OverlayHeight
ENDPROC
PROCEDURE SetOverlayHeight (OverlayHeight AS Integer)
This.OverlayHeight = m.OverlayHeight
ENDPROC
PROCEDURE GetOverlayMargin() AS Integer
SAFETHIS
RETURN This.OverlayMargin
ENDPROC
PROCEDURE SetOverlayMargin (OverlayMargin AS Integer)
This.OverlayMargin = m.OverlayMargin
ENDPROC
* overlay isometric?
PROCEDURE GetOverlayIsometric() AS Logical
SAFETHIS
RETURN This.OverlayIsometric
ENDPROC
PROCEDURE SetOverlayIsometric (OverlayIsometric AS Logical)
This.OverlayIsometric = m.OverlayIsometric
ENDPROC
* getters and setters of the Zint properties
* check Zint documentation, mainly at https://www.zint.org.uk/manual/chapter/5
* ordered as in the table in the Zint documentation (point 5.6) or zint.h
**** Symbology
PROCEDURE GetSymbology () AS Integer
SAFETHIS
RETURN This.ReadInt(This.Symbol + This.ZStructure.ZSSymbology)
ENDPROC
PROCEDURE SetSymbology (Symbology AS Integer)
SAFETHIS
This.WriteInt(This.Symbol + This.ZStructure.ZSSymbology, m.Symbology)
ENDPROC
**** Height
PROCEDURE GetHeight () AS Float
SAFETHIS
RETURN This.ReadFloat(This.Symbol + This.ZStructure.ZSHeight)
ENDPROC
PROCEDURE SetHeight (Height AS Float)
SAFETHIS
This.WriteFloat(This.Symbol + This.ZStructure.ZSHeight, m.Height)
ENDPROC
**** Scale
PROCEDURE GetScale () AS Float
SAFETHIS
RETURN This.ReadFloat(This.Symbol + This.ZStructure.ZSScale)
ENDPROC
PROCEDURE SetScale (Scale AS Float)
SAFETHIS
This.WriteFloat(This.Symbol + This.ZStructure.ZSScale, m.Scale)
ENDPROC
**** Whitespace Width
PROCEDURE GetWhitespaceWidth () AS Integer
SAFETHIS
RETURN This.ReadInt(This.Symbol + This.ZStructure.ZSWhitespaceWidth)
ENDPROC
PROCEDURE SetWhitespaceWidth (WhitespaceWidth AS Integer)
SAFETHIS
This.WriteInt(This.Symbol + This.ZStructure.ZSWhitespaceWidth, m.WhitespaceWidth)
ENDPROC
**** Whitespace Height
PROCEDURE GetWhitespaceHeight () AS Integer
SAFETHIS
RETURN This.ReadInt(This.Symbol + This.ZStructure.ZSWhitespaceHeight)
ENDPROC
PROCEDURE SetWhitespaceHeight (WhitespaceHeight AS Integer)
SAFETHIS
This.WriteInt(This.Symbol + This.ZStructure.ZSWhitespaceHeight, m.WhitespaceHeight)
ENDPROC
**** Border Width
PROCEDURE GetBorderWidth () AS Integer
SAFETHIS
RETURN This.ReadInt(This.Symbol + This.ZStructure.ZSBorderWidth)
ENDPROC
PROCEDURE SetBorderWidth (BorderWidth AS Integer)
SAFETHIS
This.WriteInt(This.Symbol + This.ZStructure.ZSBorderWidth, m.BorderWidth)
ENDPROC
**** Output Options
PROCEDURE GetOutputOptions () AS Integer
SAFETHIS
RETURN This.ReadInt(This.Symbol + This.ZStructure.ZSOutputOptions)
ENDPROC
PROCEDURE SetOutputOptions (OutputOptions AS Integer)
SAFETHIS
This.WriteInt(This.Symbol + This.ZStructure.ZSOutputOptions, m.OutputOptions)
ENDPROC
* colors are translated back and forth to VFP's RGB() colors
* helper functions to get and set colours
HIDDEN FUNCTION GetColour (Member AS Integer, DefaultColor AS IntegerOrString, ForceRGB AS Logical) AS IntegerOrString
SAFETHIS
LOCAL HexString AS String
LOCAL ColorCode AS IntegerOrString
DO CASE
CASE This.CmykModel == 1 AND ! m.ForceRGB
m.ColorCode = This.CmykToRgb(This.ReadCString(This.Symbol + m.Member), m.DefaultColor)
CASE This.CmykModel == 2 AND ! m.ForceRGB
m.ColorCode = This.ReadCString(This.Symbol + m.Member)
OTHERWISE
m.HexString = PADR(This.ReadCString(This.Symbol + m.Member), 6, "0")
TRY
m.ColorCode = EVALUATE("0x" + RIGHT(m.HexString, 2) + SUBSTR(m.HexString, 3, 2) + LEFT(m.HexString, 2))
CATCH
m.ColorCode = m.DefaultColor
ENDTRY
ENDCASE
RETURN m.ColorCode
ENDFUNC
HIDDEN FUNCTION SetColour (Member as Integer, Colour AS IntegerOrString, ForceRGB AS Logical)
SAFETHIS
DO CASE
CASE This.CmykModel == 1 AND ! m.ForceRGB
This.WriteCharArray(This.Symbol + m.Member, This.RgbToCmyk(m.Colour) + CHR(0))
CASE This.CmykModel == 2 AND ! m.ForceRGB
This.WriteCharArray(This.Symbol + m.Member, m.Colour + CHR(0))
OTHERWISE
This.WriteCharArray(This.Symbol + m.Member, SUBSTR(TRANSFORM(CTOBIN(BINTOC(m.Colour, "S"), "4RS"), "@0"), 3, 6) + CHR(0))
ENDCASE
ENDFUNC
*** Foreground Colour
PROCEDURE GetFGColour (ForceRGB AS Logical) AS IntegerOrString
RETURN This.GetColour(This.ZStructure.ZSFGColour, RGB(0, 0, 0), m.ForceRGB)
ENDPROC
PROCEDURE SetFGColour (FGColour AS IntegerOrString, ForceRGB AS Logical)
This.SetColour(This.ZStructure.ZSFGColour, m.FGColour, m.ForceRGB)
ENDPROC
*** Background Colour
PROCEDURE GetBGColour (ForceRGB AS Logical) AS IntegerOrString
RETURN This.GetColour(This.ZStructure.ZSBGColour, RGB(255, 255, 255), m.ForceRGB)
ENDPROC
PROCEDURE SetBGColour (BGColour AS IntegerOrString, ForceRGB AS Logical)
This.SetColour(This.ZStructure.ZSBGColour, m.BGColour, m.ForceRGB)
ENDPROC
**** Out File
PROCEDURE GetOutfile () AS String
SAFETHIS
LOCAL OutFile AS String
m.OutFile = This.ReadCString(This.Symbol + This.ZStructure.ZSOutfile)
IF This.ZVersion >= 21300
m.OutFile = STRCONV(m.OutFile, 11)
ENDIF
RETURN m.OutFile
ENDPROC
PROCEDURE SetOutfile (Outfile AS String)
SAFETHIS
LOCAL Transformed AS String
IF This.ZVersion >= 21300
m.Transformed = STRCONV(m.Outfile, 9)
ELSE
m.Transformed = m.Outfile
ENDIF
This.WriteCharArray(This.Symbol + This.ZStructure.ZSOutfile, PADR(m.Transformed, This.ZStructure.ZSOutfileLen - 1, CHR(0)))
ENDPROC
**** Primary message data
PROCEDURE GetPrimary () AS String
SAFETHIS
RETURN This.ReadCString(This.Symbol + This.ZStructure.ZSPrimary)
ENDPROC
PROCEDURE SetPrimary (PrimaryMessage AS String)
SAFETHIS
This.WriteCharArray(This.Symbol + This.ZStructure.ZSPrimary, PADR(m.PrimaryMessage, This.ZStructure.ZSPrimaryLen - 1, CHR(0)))
ENDPROC
* options are indexed 1..3
**** Option
PROCEDURE GetOption (Option AS Integer) AS Integer
SAFETHIS
RETURN This.ReadInt(This.Symbol + This.ZStructure.ZSOption + (MIN((MAX(INT(m.Option), 1)), 3) - 1) * 4)
ENDPROC
PROCEDURE SetOption (Option AS Integer, OptionValue AS Integer) AS Integer
SAFETHIS
This.WriteInt(This.Symbol + This.ZStructure.ZSOption + (MIN((MAX(INT(m.Option), 1)), 3) - 1) * 4, m.OptionValue)
ENDPROC
**** Show Human Readable Text
PROCEDURE GetShowHumanReadableText () AS Logical
SAFETHIS
RETURN This.ReadInt(This.Symbol + This.ZStructure.ZSShowHumanReadableText) == 1
ENDPROC
PROCEDURE SetShowHumanReadableText (ShowHumanReadableText AS Logical)
SAFETHIS
This.WriteInt(This.Symbol + This.ZStructure.ZSShowHumanReadableText, IIF(m.ShowHumanReadableText, 1, 0))
ENDPROC
**** Font Size **** Unused
PROCEDURE GetFontSize () AS Integer
SAFETHIS
RETURN IIF(ISNULL(This.ZStructure.ZSFontSize), 0, This.ReadInt(This.Symbol + This.ZStructure.ZSFontSize))
ENDPROC
PROCEDURE SetFontSize (FontSize AS Integer)
SAFETHIS
IF ! ISNULL(This.ZStructure.ZSFontSize)
This.WriteInt(This.Symbol + This.ZStructure.ZSFontSize, m.FontSize)
ENDIF
ENDPROC
**** Input Mode
PROCEDURE GetInputMode () AS Integer
SAFETHIS
RETURN This.ReadInt(This.Symbol + This.ZStructure.ZSInputMode)
ENDPROC
PROCEDURE SetInputMode (InputMode AS Integer)
SAFETHIS
This.WriteInt(This.Symbol + This.ZStructure.ZSInputMode, m.InputMode)
ENDPROC
**** Extended Channel Interpretation