#include <cstring>
#include "tcolorfunctions.h"
#include "tpixelutils.h"

TPixel32 TColorFader::operator()(const TPixel32 &color) const
{
	TPixel32 ret = blend(color, m_color, m_fade);
	return ret;
}

bool TColorFader::getParameters(Parameters &p) const
{
	p.m_mR = p.m_mG = p.m_mB = p.m_mM = (1 - m_fade);
	p.m_cR = m_fade * m_color.r;
	p.m_cG = m_fade * m_color.g;
	p.m_cB = m_fade * m_color.b;
	p.m_cM = m_fade * m_color.m;
	return true;
}

//---------------------------------------

TGenericColorFunction::TGenericColorFunction(const double m[4], const double c[4])
{
	memcpy(m_m, m, 4 * sizeof(double));
	memcpy(m_c, c, 4 * sizeof(double));
}

//---------------------------------------

TPixel32 TGenericColorFunction::operator()(const TPixel32 &color) const
{
	return TPixel32(tcrop(m_m[0] * color.r + m_c[0], 0.0, 255.0),
					tcrop(m_m[1] * color.g + m_c[1], 0.0, 255.0),
					tcrop(m_m[2] * color.b + m_c[2], 0.0, 255.0),
					tcrop(m_m[3] * color.m + m_c[3], 0.0, 255.0));
}

//---------------------------------------

bool TGenericColorFunction::getParameters(Parameters &p) const
{
	p.m_mR = m_m[0], p.m_mG = m_m[1], p.m_mB = m_m[2], p.m_mM = m_m[3];
	p.m_cR = m_c[0], p.m_cG = m_c[1], p.m_cB = m_c[2], p.m_cM = m_c[3];

	return true;
}

//---------------------------------------

TPixel32 TTranspFader::operator()(const TPixel32 &color) const
{
	return TPixel32(color.r, color.g, color.b, m_transp * color.m);
}

//---------------------------------------

bool TTranspFader::getParameters(Parameters &p) const
{
	assert(false);
	return true;
}

//----------------------------------

TPixel32 TOnionFader::operator()(const TPixel32 &color) const
{
	if (color.m == 0)
		return color;

	TPixel32 blendColor = blend(color, m_color, m_fade);
	blendColor.m = 180;
	return blendColor;
}

bool TOnionFader::getParameters(Parameters &p) const
{
	p.m_mR = p.m_mG = p.m_mB = (1 - m_fade);
	p.m_mM = 1;
	p.m_cR = m_fade * m_color.r;
	p.m_cG = m_fade * m_color.g;
	p.m_cB = m_fade * m_color.b;
	p.m_cM = m_color.m;
	return true;
}