| Pic.SetTransparentColor | Part of Pic module |
| Syntax | Pic.SetTransparentColor (colorNumber : int) |
| Description | The Pic.SetTransparentColor procedure sets the color in the
picture that should be considered transparent when the picture is
drawn using the picMerge or picUnderMerge modes.
If no color is specified, then the default background color
(colorbg, usually white) is used as the transparent
color.
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| Details | This call is often used when displaying images that were
originally stored as GIFs and translated into another format.
Many GIFs have a transparent color that can be non-white. To use
this call, you must know the color number that represents the color
in the image that is to be transparent.
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| Example | This program displays two images loaded from the same file. In the
second image,the transparent color has been set to bright red (that
is, the parts of the image that are meant to be transparent are in
bright red).
var pic1 : int := Pic.FileNew ("airplane.bmp")
var pic2 : int := Pic.FileNew ("airplane.bmp")
Pic.SetTransparentColor (pic2, brightred)
setscreen ("offscreenonly")
for x : 100 .. maxx - 100
cls
put "The lower image has the transparent color set to bright red"
Pic.Draw (pic1, x, 150, picMerge)
Pic.Draw (pic2, x, 50, picMerge)
View.Update
delay (5)
end for
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| Execute | |
| Details | Pic.SetTransparentColour is an alternate spelling for Pic.SetTransparentColor. |
| Status | Exported qualified. This means that you can only call the function by calling Pic.SetTransparentColor, not by calling SetTransparentColor.
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| See also | Pic.Draw and
Pic.FileNew.
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