Platform | Win32, x64 |
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Purpose |
To set the opacity for future drawing operations. |
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Syntax |
SUBROUTINE SET_OPACITY( OPACITY ) |
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Description |
SET_OPACITY@ enables programmers to set the alpha value for colours. A value for Opacity in the range 0-255 inclusive, sets this as the default value for the current drawing surface and activates the GDI+ library. 255 is fully opaque - colours without an opacity value can be considered having an opacity of 255. A value of 256 (the initial default) indicates that the GDI+ library is not to be used. This function returns the previous opacity value. With the function and SET_SMOOTHING_MODE@, standard ClearWin+ drawing routines like DRAW_LINE_BETWEEN@ and DRAW_CHARACTERS@ can be used without change. |
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Notes |
Introduced with FTN95 7.00. |
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See also |