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PNGReaderMBS class

dim Current as PictureMBS // global
dim f as FolderItem

f=GetopenFolderItem(FileTypes.Png)

if f<>Nil then
  Current=nil
  
  dim p as new PNGReaderMBS
  
  if p.OpenFile(f) then
    if p.ApplyOptions(0) then
      
      Current=new PictureMBS(p.Width,p.Height,PictureMBS.ImageFormatRGB)
      
      dim i,c as Integer
      
      c=p.Height-1
      for i=0 to c
        Current.RowInFormat(i, PictureMBS.ImageFormatRGBA)=p.ReadRow
      next
      
    end if
  end if
end if

• 2 events
  • event Error(msg as string)
  • event Warning(msg as string)
• 28 properties
  • property AllowDamaged as Boolean
  • property BitDepth as Integer
  • property ChunkCacheMax as UInt32
  • property ChunkMallocMax as UInt64
  • property ColorType as Integer
  • property CompressionBufferSize as UInt64
  • property ExpandGrayToRGB as Boolean
  • property HasTransparency as Boolean
  • property Height as Integer
  • property InterlaceType as Integer
  • property Interlacing as Integer
  • property InvertAlpha as Boolean
  • property Mask as Picture
  • property OriginalColorType as Integer
  • property Pict as Picture
  • property RGBToGray as Boolean
  • property RGBToGrayErrorAction as Integer
  • property RGBToGrayGreen as Double
  • property RGBToGrayRed as Double
  • property SourceData as String
  • property SourceFile as FolderItem
  • property SourcePath as String
  • property StripAlpha as Boolean
  • property SwapRB as Boolean
  • property UseFiller as Boolean
  • property UserHeightMaximum as UInt32
  • property UserWidthMaximum as UInt32
  • property Width as Integer
• 17 methods
  • method ApplyOptions(gamma as double = 0.0, ScreenGamma as double = -1.0) as boolean
  • method CombinePictureWithMask as picture
  • method Open(file as folderitem, data as string) as boolean
  • method OpenData(data as string) as boolean
  • method OpenFile(file as folderitem) as boolean
  • method OpenFile(Path as String) as boolean
  • method ReadEXIF(byref exif as string) as boolean
  • method ReadHeader as Boolean
  • method ReadICCProfile(byref name as string, byref compression as Integer, byref profile as string) as boolean
  • method ReadPicture as boolean
  • method ReadRow as memoryblock
  • method ReadRow(mem as memoryblock) as boolean
  • method ReadRowAlphaOnly(mem as memoryblock) as boolean
  • method ReadRowMaskOnly(mem as memoryblock) as boolean
  • method ReadsRGBTag(byref file_srgb_intent as Integer) as boolean
  • method RowBytes as Integer
• shared method PNGLibVersion as string

This class has no sub classes.

Some examples using this class:

• /Images/JPEG/PNG to JPEG with ICC Profile
• /Images/LargePicture/PictureMBS display huge picture
• /Images/LargePicture/PNG Load and Save
• /Images/PNG/Load iPhone PNG/Load iPhone PNG
• /Images/PNG/PNG Load To MemoryBlocks
• /Images/PNG/png with profile

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Xojo Developer Magazine

• 18.1, page 11: News
• 17.2, page 10: News

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

PNGpictureMBS   -   PNGWriterMBS