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PNGWriterMBS class

Var Current as PictureMBS // your picture
Var f as FolderItem

f=GetsaveFolderItem(FileTypes.Png,"test.png")

if f<>Nil then
  const PNG_COLOR_MASK_PALETTE   = 1
  const PNG_COLOR_MASK_COLOR     = 2
  const PNG_COLOR_MASK_ALPHA     = 4
  
  Var p as new PNGWriterMBS
  
  p.Width=Current.Width
  p.Height=Current.Height
  p.Type=PNG_COLOR_MASK_COLOR
  p.bpc=3
  p.Rowbytes=p.Width*p.bpc
  
  if p.OpenWriteDestination(f) then
    if p.SetHeader(false, -1) then
      if p.SetGamma(0) then
        if p.WriteInfo then
          Var i,c as Integer
          
          c=p.Height-1
          for i=0 to c
            p.WriteRow current.RowInFormat(i, Current.ImageFormatRGB)
          next
          
          if p.WriteEnd then
            MsgBox "OK"
          end if
        end if
      end if
    end if
  end if
end if

• 2 events
  • event Error(msg as string)
  • event Warning(msg as string)
• 5 properties
  • property bpc as Integer
  • property Height as Integer
  • property Rowbytes as Integer
  • property Type as Integer
  • property Width as Integer
• 22 methods
  • method CloseDestination
  • method Finish as string
  • method OpenWriteDestination(file as folderitem) as boolean
  • method OpenWriteDestination(Path as String) as boolean
  • method SetAlphaData(alphas() as Integer, colors() as color) as boolean
  • method SetAlphas as boolean
  • method SetEXIF(EXIFData as string) as boolean
  • method SetGamma(gamma as Double = 0.0) as boolean
  • method SetGrayPicture(pict as picture, mask as picture = nil) as boolean
  • method SetHeader(Interlace as boolean = false, Filter as Integer = -1, Compression as Integer = -1) as boolean
  • method SetICCProfile(name as string, CompressionType as Integer, Profile as string) as boolean
  • method SetPalette as boolean
  • method SetPaletteData(colors() as color) as boolean
  • method SetPalettePicture(pict as picture) as boolean
  • method SetResolution(ResolutionHorizontal as Integer, ResolutionVertical as Integer, Unit as Integer) as boolean
  • method SetRGBPicture(pict as picture, mask as picture = nil) as boolean
  • method SetRows(rows() as memoryblock) as boolean
  • method SetsRGB(intent as Integer) as boolean
  • method WriteEnd as boolean
  • method WriteInfo as boolean
  • method WriteRow(row as memoryblock)
  • method WriteRows as boolean
• shared method PNGLibVersion as string
• 8 constants

Constants

Type Constants

This class has no sub classes.

Some examples using this class:

• /Images/LargePicture/PNG Load and Save
• /Images/PNG/Filters and Interlace
• /Images/PNG/png with profile
• /Images/PNG/Write Gray image
• /Images/PNG/Write with PictureMBS

Blog Entries

• MBS Xojo Plugins, version 19.5pr6
• MBS Xojo Plugins in version 19.0
• MBS Xojo Plugins, version 19.0pr6
• MBS Xojo / Real Studio Plugins, version 15.0pr11
• MBS Real Studio Plugins, version 11.3pr13
• MBS REALbasic plug-ins version 9.4

Xojo Developer Magazine

• 17.2, page 11: News

Release notes

• Version 19.5
  • Added path variants for OpenWriteDestination method to PNGWriterMBS class.
• Version 19.0
  • Added SetEXIF for PNGWriterMBS class.

The items on this page are in the following plugins: MBS Images Plugin.

PNGReaderMBS   -   PopupMenu