Extract the alpha component from a color value
int PgAlphaValue( PgColor_t color );
ph
This macro extracts the alpha color component from a composite color value. The result is between 0 and 255.
This macro doesn't check the color model currently in use, and gives undefined results if you're not using the Pg_CM_ARGB model. |
Photon
Safety: | |
---|---|
Interrupt handler | No |
Signal handler | No |
Thread | No |
PgARGB(), PgBlueValue(), PgCMY(), PgColor_t, PgGreenValue(), PgHSV(), PgRedValue(), PgRGB(), PgSetFillColor(), PgSetFillDither()
“Color” and “Alpha Blending Support” in the Raw Drawing and Animation chapter of the Photon Programmer's Guide