Monkeybread Xojo plugin - PNGReaderMBS class

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PNGReaderMBS class

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
class	PNG	MBS Images Plugin	9.0	✅ Yes	✅ Yes	✅ Yes	✅ Yes	All

Function: The class for reading PNG files.
Example:

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

Notes:
Use this class to read PNG files row by row as memoryblock.

Based on LibPNG.

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:

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

PNGpictureMBS - PNGWriterMBS

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