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Sample 13


Copy/resize of transparent image part, saving it to GIF and palette PNG files


Creating a transparent image, drawing, writing to file, reading from file. Copy and resize.

ResizeTransparentPalette.vbs

Dim im
Set im = CreateObject("ActiveImage.Images.1")
im.SetImageType 1

'Set image dimensions
w1 = 300
h1 = 200

'Create Palette image
im.CreateImagePalette w1,h1
'Set white color as transparent
'First specified color becomes background
im.SetColor 255,255,255
'Set current color to transparent
im.SetTransparent 1


'Draw red circle
im.SetColor 255,0,0
im.DrawEllipse CInt(w1/2), CInt(h1/2), 100,100

'Set GIF image type
im.SetImageType 3
im.WriteToFile "C:\circle.gif"
im.DestroyImage

'Set GIF image type
im.SetImageType 3
'Load file
im.ReadFromFile "C:\circle.gif"

w1 = im.GetWidth
h1 = im.GetHeight

im.SetImage 1
w2 = 100
h2 = 100
'Create palette image
im.CreateImagePalette w2,h2
im.SetColor 255,255,255
im.SetTransparent 1
im.SetColor 0,0,255

im.DrawFilledRectangle 0,CInt(h2/2)-5,w2,CInt(h2/2)+5
im.DrawFilledRectangle CInt(w2/2)-5,0,CInt(w2/2)+5,h2

'Set GIF image type
im.SetImageType 3
im.WriteToFile "C:\plus.gif"
im.DestroyImage

'Set GIF image type
im.SetImageType 3
'Load from file
im.ReadFromFile "c:\plus.gif"

w2 = im.GetWidth
h2 = im.GetHeight
x1 = w1/2 - w2/2
y1 = h1/2 - h2/2

'Copy and resize image
im.CopyImageResize 0,1,CInt(x1),CInt(y1),0,0,CInt(w2/2),Cint(h2/2),CInt(w2), CInt(h2)

im.SetImage 0
im.WriteToFile "c:\rti.gif"
im.DestroyImage
im.SetImage 1
im.DestroyImage

Set im = Nothing


 circle plus
 Picture 1. circle.gif (transparent, size - 2,1 Kb) Picture 2. plus.gif (transparent, size - 1 Kb)
 rti.gif
 Picture 3. rti.gif (transparent, size - 2,3 Kb)

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