You find this example project in your Plugins Download as a Xojo project file within the examples folder: /Main/Duplicate Picture with Mask
Class App Inherits Application
Const kEditClear = "&Delete"
Const kFileQuit = "&Quit"
Const kFileQuitShortcut = ""
End Class
Class Window1 Inherits Window
Control Canvas1 Inherits Canvas
ControlInstance Canvas1 Inherits Canvas
End Control
Control Canvas2 Inherits Canvas
ControlInstance Canvas2 Inherits Canvas
End Control
Control PushButton1 Inherits PushButton
ControlInstance PushButton1 Inherits PushButton
EventHandler Sub Action()
dim pic as Picture = LogoMBS(300)
dim mask as Picture = pic.mask
dim g as Graphics = mask.Graphics
g.ForeColor = &cFFFFFF
g.FillRect 0,0,g.Width,g.Height
g.ForeColor = &c000000
g.FillOval 0,0,g.Width,g.Height
canvas1.Backdrop = pic
canvas2.Backdrop = pic.Duplicate
End EventHandler
End Control
Control PushButton2 Inherits PushButton
ControlInstance PushButton2 Inherits PushButton
EventHandler Sub Action()
dim pic as Picture = LogoMBS(300)
canvas1.Backdrop = pic
canvas2.Backdrop = pic.Duplicate
End EventHandler
End Control
Control PushButton3 Inherits PushButton
ControlInstance PushButton3 Inherits PushButton
EventHandler Sub Action()
#if RBVersion >= 2011.04 then
dim pic as Picture = LogoMBS(300, true)
dim m as new Picture(300, 300)
dim g as Graphics = m.Graphics
g.ForeColor = &cFFFFFF
g.FillRect 0,0,g.Width,g.Height
g.ForeColor = &c000000
g.FillOval 0,0,g.Width,g.Height
pic.ApplyMask m
canvas1.Backdrop = pic
canvas2.Backdrop = pic.Duplicate
#else
MsgBox "not supported."
#endif
End EventHandler
End Control
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
Module Module1
Function Duplicate(extends p as Picture) As Picture
#if RBVersion >= 2011.04 then
if p.HasAlphaChannel then
// create nw picture and copy content:
dim q as new Picture(p.Width, p.Height)
q.Graphics.DrawPicture p,0,0
Return q
end if
#endif
// create new picture
dim q as new Picture(p.Width, p.Height, 32)
// get mask
dim oldMask as Picture = p.mask(false)
if oldMask = nil then
// no mask, so simple copy
q.Graphics.DrawPicture p,0,0
Return q
end if
// remove mask
p.mask = nil
// copy picture and mask
q.Graphics.DrawPicture p, 0, 0
q.mask.Graphics.DrawPicture oldMask,0,0
// restore mask
p.mask = oldmask
Return q
End Function
End Module