Detailed Description

Functions to convert from the HSV colorspace to the RGB colorspace.

Definition in file hsv2rgb.cpp.

#include <stdint.h>
#include "FastLED.h"

Macros
#define	FASTLED_INTERNAL
	Disables pragma messages and warnings.

#define	APPLY_DIMMING(X) (X)
	Apply dimming compensation to values.

#define	HSV_SECTION_6 (0x20)
	Divide the color wheel into eight sections, 32 elements each.

#define	HSV_SECTION_3 (0x40)
	Divide the color wheel into four sections, 64 elements each.

#define	FORCE_REFERENCE(var) asm volatile( "" : : "r" (var) )
	Force a variable reference to avoid compiler over-optimization.

#define	FIXFRAC8(N, D) (((N)*256)/(D))
	Convert a fractional input into a constant.

Functions
void	hsv2rgb_raw_C (const struct CHSV &hsv, struct CRGB &rgb)
	HSV to RGB implementation in raw C, platform independent.

void	hsv2rgb_raw_avr (const struct CHSV &hsv, struct CRGB &rgb)
	HSV to RGB implementation in raw C, for the AVR platform only.

void	hsv2rgb_raw (const struct CHSV &hsv, struct CRGB &rgb)
	Convert an HSV value to RGB using a mathematically straight spectrum.

void	hsv2rgb_spectrum (const struct CHSV &hsv, CRGB &rgb)
	Convert an HSV value to RGB using a mathematically straight spectrum.

void	hsv2rgb_rainbow (const CHSV &hsv, CRGB &rgb)

void	hsv2rgb_raw (const struct CHSV phsv, struct CRGB prgb, int numLeds)
	Convert an HSV value to RGB using a mathematically straight spectrum.

void	hsv2rgb_rainbow (const struct CHSV phsv, struct CRGB prgb, int numLeds)
	Forward declaration of hsv2rgb_rainbow here, to avoid circular dependencies.

void	hsv2rgb_spectrum (const struct CHSV phsv, struct CRGB prgb, int numLeds)
	Convert an HSV value to RGB using a mathematically straight spectrum.

CHSV	rgb2hsv_approximate (const CRGB &rgb)
	Recover approximate HSV values from RGB.

Macro Definition Documentation

◆ APPLY_DIMMING

#define APPLY_DIMMING ( X ) (X)

Apply dimming compensation to values.

Definition at line 31 of file hsv2rgb.cpp.

◆ FASTLED_INTERNAL

#define FASTLED_INTERNAL

Disables pragma messages and warnings.

Definition at line 5 of file hsv2rgb.cpp.

◆ FIXFRAC8

#define FIXFRAC8	(		N,
			D ) (((N)*256)/(D))

Convert a fractional input into a constant.

Definition at line 493 of file hsv2rgb.cpp.

◆ FORCE_REFERENCE

#define FORCE_REFERENCE ( var ) asm volatile( "" : : "r" (var) )

Force a variable reference to avoid compiler over-optimization.

Sometimes the compiler will do clever things to reduce code size that result in a net slowdown, if it thinks that a variable is not used in a certain location. This macro does its best to convince the compiler that the variable is used in this location, to help control code motion and de-duplication that would result in a slowdown.

Definition at line 241 of file hsv2rgb.cpp.

◆ HSV_SECTION_3

#define HSV_SECTION_3 (0x40)

Divide the color wheel into four sections, 64 elements each.

Todo: I believe this is mis-named, and should be HSV_SECTION_4

Definition at line 39 of file hsv2rgb.cpp.

◆ HSV_SECTION_6

#define HSV_SECTION_6 (0x20)

Divide the color wheel into eight sections, 32 elements each.

Todo: Unused. Remove?

Definition at line 35 of file hsv2rgb.cpp.

Function Documentation

◆ hsv2rgb_rainbow()

void hsv2rgb_rainbow	(	const CHSV &	hsv,
		CRGB &	rgb )

Definition at line 251 of file hsv2rgb.cpp.

◆ hsv2rgb_raw_C()

void hsv2rgb_raw_C	(	const struct CHSV &	hsv,
		struct CRGB &	rgb )

HSV to RGB implementation in raw C, platform independent.

Definition at line 41 of file hsv2rgb.cpp.