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Pixel.cc File Reference

#include "fl/image.h"
#include "fl/pi.h"
#include <math.h>
#include <algorithm>
#include <endian.h>

Compounds
union	Int2Char
Defines
#define	redWeight   76
#define	greenWeight   150
#define	blueWeight   29
#define	totalWeight   255
#define	redToY   0.2126
#define	greenToY   0.7152
#define	blueToY   0.0722
#define	RGBBits2GrayChar(fromSize)
#define	RGBBits2GrayFloat(imageSize)
#define	RGBBits2GrayDouble(imageSize)
#define	Bits2Bits(fromSize, toSize, fromRed, fromGreen, fromBlue, fromAlpha, toRed, toGreen, toBlue, toAlpha)
#define	OddBits2Bits(toSize, fromRed, fromGreen, fromBlue, fromAlpha, toRed, toGreen, toBlue, toAlpha)
#define	Bits2OddBits(fromSize, fromRed, fromGreen, fromBlue, fromAlpha, toRed, toGreen, toBlue, toAlpha)
#define	OddBits2OddBits(fromRed, fromGreen, fromBlue, fromAlpha, toRed, toGreen, toBlue, toAlpha)
#define	GrayFloat2Bits(fromSize, toSize)
#define	GrayFloat2OddBits(fromSize)
Variables
const float	root32 = sqrtf (3.0f) / 2.0f
const float	onesixth = 1.0f / 6.0f
const float	onethird = 1.0f / 3.0f
const float	twothirds = 2.0f / 3.0f

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Define Documentation

#define Bits2Bits (  fromSize, toSize, fromRed, fromGreen, fromBlue, fromAlpha, toRed, toGreen, toBlue, toAlpha    )

Value: { \ unsigned fromSize * fromPixel = (unsigned fromSize *) image.buffer; \ unsigned toSize * toPixel = (unsigned toSize *) result.buffer; \ unsigned toSize * end = toPixel + result.width * result.height; \ while (toPixel < end) \ { \ unsigned int r = *fromPixel & fromRed; \ unsigned int g = *fromPixel & fromGreen; \ unsigned int b = *fromPixel & fromBlue; \ unsigned int a = *fromPixel & fromAlpha; \ fromPixel++; \ *toPixel++ = ((redShift > 0 ? r << redShift : r >> -redShift) & toRed) \ | ((greenShift > 0 ? g << greenShift : g >> -greenShift) & toGreen) \ | ((blueShift > 0 ? b << blueShift : b >> -blueShift) & toBlue) \ | ((alphaShift > 0 ? a << alphaShift : a >> -alphaShift) & toAlpha); \ } \ }

#define Bits2OddBits (  fromSize, fromRed, fromGreen, fromBlue, fromAlpha, toRed, toGreen, toBlue, toAlpha    )

Value: { \ unsigned fromSize * fromPixel = (unsigned fromSize *) image.buffer; \ unsigned char * toPixel = (unsigned char *) result.buffer; \ unsigned char * end = toPixel + result.width * result.height * 3; \ while (toPixel < end) \ { \ unsigned int r = *fromPixel & fromRed; \ unsigned int g = *fromPixel & fromGreen; \ unsigned int b = *fromPixel & fromBlue; \ unsigned int a = *fromPixel & fromAlpha; \ fromPixel++; \ Int2Char t; \ t.all = ((redShift > 0 ? r << redShift : r >> -redShift) & toRed) \ | ((greenShift > 0 ? g << greenShift : g >> -greenShift) & toGreen) \ | ((blueShift > 0 ? b << blueShift : b >> -blueShift) & toBlue) \ | ((alphaShift > 0 ? a << alphaShift : a >> -alphaShift) & toAlpha); \ *toPixel++ = t.piece[0]; \ *toPixel++ = t.piece[1]; \ *toPixel++ = t.piece[2]; \ } \ }

#define blueToY   0.0722

#define blueWeight   29

#define GrayFloat2Bits (  fromSize, toSize    )

Value: { \ fromSize * fromPixel = (fromSize *) image.buffer; \ unsigned toSize * toPixel = (unsigned toSize *) result.buffer; \ unsigned toSize * end = toPixel + result.width * result.height; \ while (toPixel < end) \ { \ fromSize v = min (max (*fromPixel++, (fromSize) 0.0), (fromSize) 1.0); \ delinearize (v); \ unsigned int t = (unsigned int) (v * (255 << 8)); \ *toPixel++ = ((redShift > 0 ? t << redShift : t >> -redShift) & redMask) \ | ((greenShift > 0 ? t << greenShift : t >> -greenShift) & greenMask) \ | ((blueShift > 0 ? t << blueShift : t >> -blueShift) & blueMask) \ | alphaMask; \ } \ }

#define GrayFloat2OddBits (  fromSize    )

Value: { \ fromSize * fromPixel = (fromSize *) image.buffer; \ unsigned char * toPixel = (unsigned char *) result.buffer; \ unsigned char * end = toPixel + result.width * result.height * 3; \ while (toPixel < end) \ { \ fromSize v = min (max (*fromPixel++, (fromSize) 0.0), (fromSize) 1.0); \ delinearize (v); \ unsigned int t = (unsigned int) (v * (255 << 8)); \ t = ((redShift > 0 ? t << redShift : t >> -redShift) & redMask) \ | ((greenShift > 0 ? t << greenShift : t >> -greenShift) & greenMask) \ | ((blueShift > 0 ? t << blueShift : t >> -blueShift) & blueMask) \ | alphaMask; \ *toPixel++ = t & 0xFF; \ *toPixel++ = (t >>= 8) & 0xFF; \ *toPixel++ = (t >> 8) & 0xFF; \ } \ }

#define greenToY   0.7152

#define greenWeight   150

#define OddBits2Bits (  toSize, fromRed, fromGreen, fromBlue, fromAlpha, toRed, toGreen, toBlue, toAlpha    )

Value: { \ unsigned char * fromPixel = (unsigned char *) image.buffer; \ unsigned toSize * toPixel = (unsigned toSize *) result.buffer; \ unsigned toSize * end = toPixel + result.width * result.height; \ while (toPixel < end) \ { \ Int2Char t; \ t.piece[0] = *fromPixel++; \ t.piece[1] = *fromPixel++; \ t.piece[2] = *fromPixel++; \ unsigned int r = t.all & fromRed; \ unsigned int g = t.all & fromGreen; \ unsigned int b = t.all & fromBlue; \ unsigned int a = t.all & fromAlpha; \ *toPixel++ = ((redShift > 0 ? r << redShift : r >> -redShift) & toRed) \ | ((greenShift > 0 ? g << greenShift : g >> -greenShift) & toGreen) \ | ((blueShift > 0 ? b << blueShift : b >> -blueShift) & toBlue) \ | ((alphaShift > 0 ? a << alphaShift : a >> -alphaShift) & toAlpha); \ } \ }

#define OddBits2OddBits (  fromRed, fromGreen, fromBlue, fromAlpha, toRed, toGreen, toBlue, toAlpha    )

Value: { \ unsigned char * fromPixel = (unsigned char *) image.buffer; \ unsigned char * toPixel = (unsigned char *) result.buffer; \ unsigned char * end = toPixel + result.width * result.height * 3; \ while (toPixel < end) \ { \ Int2Char t; \ t.piece[0] = *fromPixel++; \ t.piece[1] = *fromPixel++; \ t.piece[2] = *fromPixel++; \ unsigned int r = t.all & fromRed; \ unsigned int g = t.all & fromGreen; \ unsigned int b = t.all & fromBlue; \ unsigned int a = t.all & fromAlpha; \ t.all = ((redShift > 0 ? r << redShift : r >> -redShift) & toRed) \ | ((greenShift > 0 ? g << greenShift : g >> -greenShift) & toGreen) \ | ((blueShift > 0 ? b << blueShift : b >> -blueShift) & toBlue) \ | ((alphaShift > 0 ? a << alphaShift : a >> -alphaShift) & toAlpha); \ *toPixel++ = t.piece[0]; \ *toPixel++ = t.piece[1]; \ *toPixel++ = t.piece[2]; \ } \ }

#define redToY   0.2126

#define redWeight   76

#define RGBBits2GrayChar (  fromSize    )

Value: { \ unsigned fromSize * fromPixel = (unsigned fromSize *) image.buffer; \ unsigned char * toPixel = (unsigned char *) result.buffer; \ unsigned char * end = toPixel + result.width * result.height; \ while (toPixel < end) \ { \ unsigned int r = *fromPixel & that->redMask; \ unsigned int g = *fromPixel & that->greenMask; \ unsigned int b = *fromPixel & that->blueMask; \ fromPixel++; \ *toPixel++ = ( (redShift > 0 ? r << redShift : r >> -redShift) * redWeight \ + (greenShift > 0 ? g << greenShift : g >> -greenShift) * greenWeight \ + (blueShift > 0 ? b << blueShift : b >> -blueShift) * blueWeight \ ) / (totalWeight << 8); \ } \ }

#define RGBBits2GrayDouble (  imageSize    )

Value: { \ unsigned imageSize * fromPixel = (unsigned imageSize *) image.buffer; \ double * toPixel = (double *) result.buffer; \ double * end = toPixel + result.width * result.height; \ while (toPixel < end) \ { \ unsigned int r = *fromPixel & that->redMask; \ unsigned int g = *fromPixel & that->greenMask; \ unsigned int b = *fromPixel & that->blueMask; \ fromPixel++; \ double fr = (redShift > 0 ? r << redShift : r >> -redShift) / 255.0; \ double fg = (greenShift > 0 ? g << greenShift : g >> -greenShift) / 255.0; \ double fb = (blueShift > 0 ? b << blueShift : b >> -blueShift) / 255.0; \ linearize (fr); \ linearize (fg); \ linearize (fb); \ *toPixel++ = redToY * fr + greenToY * fg + blueToY * fb; \ } \ }

#define RGBBits2GrayFloat (  imageSize    )

Value: { \ unsigned imageSize * fromPixel = (unsigned imageSize *) image.buffer; \ float * toPixel = (float *) result.buffer; \ float * end = toPixel + result.width * result.height; \ while (toPixel < end) \ { \ unsigned int r = *fromPixel & that->redMask; \ unsigned int g = *fromPixel & that->greenMask; \ unsigned int b = *fromPixel & that->blueMask; \ fromPixel++; \ float fr = (redShift > 0 ? r << redShift : r >> -redShift) / 255.0f; \ float fg = (greenShift > 0 ? g << greenShift : g >> -greenShift) / 255.0f; \ float fb = (blueShift > 0 ? b << blueShift : b >> -blueShift) / 255.0f; \ linearize (fr); \ linearize (fg); \ linearize (fb); \ *toPixel++ = redToY * fr + greenToY * fg + blueToY * fb; \ } \ }

#define totalWeight   255

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Variable Documentation

const float onesixth = 1.0f / 6.0f

const float onethird = 1.0f / 3.0f

const float root32 = sqrtf (3.0f) / 2.0f

const float twothirds = 2.0f / 3.0f

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