Extract color brightness
int PgGrayValue( PgColor_t color );
ph
This macro converts a composite color into its corresponding level of gray. The calculation is based on 30% red, 59% green, and 11% blue, resulting in a value between 0 and 255.
The gray component of the color.
// Convert pal[i] into monochrome pal[i] = PgGray( PgGrayValue( pal[i] ) );
Photon
Safety: | |
---|---|
Interrupt handler | No |
Signal handler | No |
Thread | No |
PgBlueValue(), PgCMY(), PgColor_t, PgGreenValue(), PgHSV(), PgRedValue(), PgRGB(), PgSetFillColor(), PgSetFillDither()
“Color” in the Raw Drawing and Animation chapter of the Photon Programmer's Guide