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/AVFoundation/CVPixelBuffer test
Required plugins for this example: MBS Main Plugin, MBS AVFoundation Plugin, MBS MacCI Plugin, MBS MacCG Plugin, MBS MacCF Plugin, MBS MacBase Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /AVFoundation/CVPixelBuffer test
This example is the version from Tue, 26th Aug 2019.
Project "CVPixelBuffer test.xojo_binary_project"
Class App Inherits Application
Const kEditClear = "&Delete"
Const kFileQuit = "&Quit"
Const kFileQuitShortcut = ""
End Class
Class MainWindow Inherits Window
Control Canvas1 Inherits Canvas
ControlInstance Canvas1 Inherits Canvas
EventHandler Sub Paint(g As Graphics, areas() As REALbasic.Rect)
If pic1 <> Nil Then
g.DrawPicture pic1, 0, 0, g.Width, g.Height, 0, 0, pic1.Width, pic1.Height
End If
End EventHandler
End Control
Control Canvas2 Inherits Canvas
ControlInstance Canvas2 Inherits Canvas
EventHandler Sub Paint(g As Graphics, areas() As REALbasic.Rect)
If pic2 <> Nil Then
g.DrawPicture pic2, 0, 0, g.Width, g.Height, 0, 0, pic2.Width, pic2.Height
End If
End EventHandler
End Control
Control Canvas3 Inherits Canvas
ControlInstance Canvas3 Inherits Canvas
EventHandler Sub Paint(g As Graphics, areas() As REALbasic.Rect)
If pic3 <> Nil Then
g.DrawPicture pic3, 0, 0, g.Width, g.Height, 0, 0, pic3.Width, pic3.Height
End If
End EventHandler
End Control
Control Canvas4 Inherits Canvas
ControlInstance Canvas4 Inherits Canvas
EventHandler Sub Paint(g As Graphics, areas() As REALbasic.Rect)
If pic4 <> Nil Then
g.DrawPicture pic4, 0, 0, g.Width, g.Height, 0, 0, pic4.Width, pic4.Height
End If
End EventHandler
End Control
Control List Inherits Listbox
ControlInstance List Inherits Listbox
End Control
EventHandler Sub Open()
MakePic1
MakePic2
MakePic3
MakePic4
End EventHandler
Sub MakePic1()
// 8bit gray
list.AddRow CurrentMethodName
Const Width = 600
Const Height = 400
Dim BytesPerPixel As Integer = 1
Dim RowBytes As Integer = RoundUp32( BytesPerPixel * Width)
Dim data As New MemoryBlock(RowBytes * Height)
Dim w As Integer = Width -1
Dim h As Integer = Height-1
Dim o As Integer
For y As Integer = 0 To h
o = y * rowbytes
For x As Integer = 0 To w
data.UInt8Value(o) = x + y
o = o + BytesPerPixel
Next
Next
Dim dic As New Dictionary
dic.Value(CVPixelBufferMBS.kCVPixelBufferCGImageCompatibilityKey) = True
dic.Value(CVPixelBufferMBS.kCVPixelBufferCGBitmapContextCompatibilityKey) = True
Dim c As New CVPixelBufferMBS(width, Height, CVPixelBufferMBS.kCVPixelFormatType_OneComponent8, data, RowBytes, dic)
Dim image As CIImageMBS = c.CIImage
If image <> Nil Then
pic1 = image.RenderPicture
Else
List.AddRow "CIImage is nil"
End If
Exception u As UnsupportedOperationException
list.AddRow u.message + " "+Str(u.errorNumber)
End Sub
Sub MakePic2()
// 24 bit RGB
list.AddRow CurrentMethodName
Const Width = 600
Const Height = 400
Dim BytesPerPixel As Integer = 3
Dim RowBytes As Integer = RoundUp32( BytesPerPixel * Width)
Dim data As New MemoryBlock(RowBytes * Height)
Dim w As Integer = Width -1
Dim h As Integer = Height-1
Dim o As Integer
For y As Integer = 0 To h
o = y * rowbytes
For x As Integer = 0 To w
data.UInt8Value(o+0) = x + y
data.UInt8Value(o+1) = x
data.UInt8Value(o+2) = y
o = o + BytesPerPixel
Next
Next
Dim dic As New Dictionary
dic.Value(CVPixelBufferMBS.kCVPixelBufferCGImageCompatibilityKey) = True
dic.Value(CVPixelBufferMBS.kCVPixelBufferCGBitmapContextCompatibilityKey) = True
#Pragma BreakOnExceptions off
Dim c As New CVPixelBufferMBS(width, Height, CVPixelBufferMBS.kCVPixelFormatType_24RGB, data, RowBytes, dic)
Dim image As CIImageMBS = c.CIImage
If image <> Nil Then
pic2 = image.RenderPicture
Else
List.AddRow "CIImage is nil"
End If
Exception u As UnsupportedOperationException
list.AddRow u.message + " "+Str(u.errorNumber)
End Sub
Sub MakePic3()
// 32bit RGB
list.AddRow CurrentMethodName
Const Width = 600
Const Height = 400
Dim BytesPerPixel As Integer = 4
Dim RowBytes As Integer = RoundUp32( BytesPerPixel * Width)
Dim data As New MemoryBlock(RowBytes * Height)
Dim w As Integer = Width -1
Dim h As Integer = Height-1
Dim o As Integer
For y As Integer = 0 To h
o = y * rowbytes
For x As Integer = 0 To w
data.UInt8Value(o+0) = 255
data.UInt8Value(o+1) = x + y
data.UInt8Value(o+2) = x
data.UInt8Value(o+3) = y
o = o + BytesPerPixel
Next
Next
Dim dic As New Dictionary
dic.Value(CVPixelBufferMBS.kCVPixelBufferCGImageCompatibilityKey) = True
dic.Value(CVPixelBufferMBS.kCVPixelBufferCGBitmapContextCompatibilityKey) = True
#Pragma BreakOnExceptions off
Dim c As New CVPixelBufferMBS(width, Height, CVPixelBufferMBS.kCVPixelFormatType_32ARGB, data, RowBytes, dic)
Dim image As CIImageMBS = c.CIImage
If image <> Nil Then
pic3 = image.RenderPicture
Else
List.AddRow "CIImage is nil"
End If
Exception u As UnsupportedOperationException
list.AddRow u.message + " "+Str(u.errorNumber)
End Sub
Sub MakePic4()
// VUY
list.AddRow CurrentMethodName
Const Width = 600
Const Height = 400
Dim BytesPerPixel As Integer = 1
Dim RowBytes As Integer = RoundUp32( BytesPerPixel * Width)
Dim data As New MemoryBlock(RowBytes * Height)
Dim w As Integer = Width -1
Dim h As Integer = Height-1
Dim o As Integer
For y As Integer = 0 To h
o = y * rowbytes
For x As Integer = 0 To w
data.UInt8Value(o+0) = x + y
o = o + BytesPerPixel
Next
Next
Dim dic As New Dictionary
dic.Value(CVPixelBufferMBS.kCVPixelBufferCGImageCompatibilityKey) = True
dic.Value(CVPixelBufferMBS.kCVPixelBufferCGBitmapContextCompatibilityKey) = True
#Pragma BreakOnExceptions off
Dim c As New CVPixelBufferMBS(width, Height, CVPixelBufferMBS.kCVPixelFormatType_422YpCbCr8, data, RowBytes, dic)
Dim image As CIImageMBS = c.CIImage
If image <> Nil Then
pic4 = image.RenderPicture
Else
List.AddRow "CIImage is nil"
End If
Exception u As UnsupportedOperationException
list.AddRow u.message + " "+Str(u.errorNumber)
End Sub
Function RoundUp32(n as integer) As integer
Dim r As Integer = (n+31) \ 32
Return r * 32
End Function
Property pic1 As picture
Property pic2 As picture
Property pic3 As picture
Property pic4 As picture
End Class
MenuBar MainMenuBar
MenuItem FileMenu = "&File"
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "&Edit"
MenuItem EditUndo = "&Undo"
MenuItem EditSeparator1 = "-"
MenuItem EditCut = "Cu&t"
MenuItem EditCopy = "&Copy"
MenuItem EditPaste = "&Paste"
MenuItem EditClear = "#App.kEditClear"
MenuItem EditSeparator2 = "-"
MenuItem EditSelectAll = "Select &All"
End MenuBar
End Project
The items on this page are in the following plugins: MBS AVFoundation Plugin.
