light_state_t Struct Reference
The parameters that can be set for a given light.
Not all lights must support all parameters. If you can do something backward-compatible, you should.
|unsigned int color|
The color of the LED in ARGB.
Do your best here.
- If your light can only do red or green, if they ask for blue, you should do green.
If you can only do a brightness ramp, then use this formula: unsigned char brightness = ((77*((color>>16)&0x00ff))
- (150*((color>>8)&0x00ff)) + (29*(color&0x00ff))) >> 8;
- If you can only do on or off, 0 is off, anything else is on.
The high byte should be ignored. Callers will set it to 0xff (which would correspond to 255 alpha).
The documentation for this struct was generated from the following file:
- hardware/libhardware/include/hardware/ lights.h