Platforms to show: All Mac Windows Linux Cross-Platform
Required plugins for this example: MBS Main Plugin, MBS Images Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /Images/PNG/Write Gray image
This example is the version from Sun, 5th May 2018.
Project "Write Gray image.xojo_binary_project"
Class App Inherits Application
Const kEditClear = "&Delete"
Const kFileQuit = "&Quit"
Const kFileQuitShortcut = ""
EventHandler Sub Open()
// Write a RGBA PNG file
dim current as Picture = LogoMBS(500) // needs Main Plugin
// create a mask
dim g as Graphics = current.Mask.Graphics
g.ForeColor = &cFFFFFF
g.FillRect 0,0,500,500
g.ForeColor = &c000000
g.FillOval 0,0,500,500
// show in window
window1.Backdrop = current
// and write to file
dim f as FolderItem = SpecialFolder.Desktop.Child("test with alpha.png")
dim p as new PNGWriterMBS
if p.OpenWriteDestination(f) then // open file
if p.SetGrayPicture(current, current.mask) then // set picture to write
if p.SetHeader(false, -1) then // setup file header
if p.SetGamma(0) then // and default gamma
if p.WriteInfo then // write file header
if p.WriteRows then // write pixels
if p.WriteEnd then // and write file end
p = nil // cleanup
f.Launch
end if
end if
end if
end if
end if
end if
end if
f = SpecialFolder.Desktop.Child("test without alpha.png")
p = new PNGWriterMBS
if p.OpenWriteDestination(f) then // open file
if p.SetGrayPicture(current) then // set picture to write
if p.SetHeader(false, -1) then // setup file header
if p.SetGamma(0) then // and default gamma
if p.WriteInfo then // write file header
if p.WriteRows then // write pixels
if p.WriteEnd then // and write file end
p = nil // cleanup
f.Launch
end if
end if
end if
end if
end if
end if
end if
End EventHandler
End Class
MenuBar MenuBar1
MenuItem FileMenu = "&File"
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "&Edit"
MenuItem EditUndo = "&Undo"
MenuItem UntitledMenu1 = "-"
MenuItem EditCut = "Cu&t"
MenuItem EditCopy = "&Copy"
MenuItem EditPaste = "&Paste"
MenuItem EditClear = "#App.kEditClear"
MenuItem UntitledMenu0 = "-"
MenuItem EditSelectAll = "Select &All"
End MenuBar
Class Window1 Inherits Window
End Class
End Project
See also:
The items on this page are in the following plugins: MBS Images Plugin.
