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/*
* This file is a part of Luminance HDR package
* ----------------------------------------------------------------------
* Copyright (C) 2013 Davide Anastasia
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* ----------------------------------------------------------------------
*/
#include <gtest/gtest.h>
#include <boost/assign/std/vector.hpp> // for 'operator+=()'
#include <boost/assert.hpp>
#include <Libpfs/array2d.h>
#include <Libpfs/colorspace/colorspace.h>
#include "PrintArray2D.h"
typedef std::vector<float> ColorSpaceSamples;
using namespace std;
using namespace boost::assign; // bring 'operator+=()' into scope
TEST(TestSRGB2Y, TestSRGB2XYZ)
{
ColorSpaceSamples redInput;
ColorSpaceSamples greenInput;
ColorSpaceSamples blueInput;
ColorSpaceSamples xOutput;
ColorSpaceSamples yOutput;
ColorSpaceSamples zOutput;
redInput += 0.f, 1.f, 0.f, 0.f, 0.2f, 1.f, 1.2f, 1.2f, 2.f, -0.2f;
greenInput += 0.f, 0.f, 1.f, 0.f, 0.3f, 1.f, 0.f, 0.0f, 1.2f, -0.9f;
blueInput += 0.f, 0.f, 0.f, 1.f, 0.4f, 1.f, 0.f, 1.4f, 2.f, 0.3f;
xOutput += 0.f, 0.412456f, 0.357576f, 0.180437f, 0.063817f, 0.950470f, 0.625629f, 1.015924f, 3.479490f, -0.281999f;
yOutput += 0.f, 0.212673f, 0.715152f, 0.072175f, 0.069007f, 1.f, 0.322590f, 0.478708f, 2.495864f, -0.564874f;
zOutput += 0.f, 0.019334f, 0.119192f, 0.950304f, 0.135635f, 1.088830f, 0.029326f, 2.084876f, 4.984232f, -0.024894f;
ASSERT_TRUE( static_cast<bool>(yOutput.size()) );
ASSERT_EQ( zOutput.size(), xOutput.size() );
ASSERT_EQ( xOutput.size(), yOutput.size() );
ASSERT_EQ( yOutput.size(), blueInput.size() );
ASSERT_EQ( redInput.size(), blueInput.size() );
ASSERT_EQ( greenInput.size(), blueInput.size() );
pfs::Array2Df A2DRed(redInput.size(), 1);
pfs::Array2Df A2DGreen(greenInput.size(), 1);
pfs::Array2Df A2DBlue(blueInput.size(), 1);
std::copy(redInput.begin(), redInput.end(), A2DRed.begin());
std::copy(greenInput.begin(), greenInput.end(), A2DGreen.begin());
std::copy(blueInput.begin(), blueInput.end(), A2DBlue.begin());
pfs::Array2Df A2DX(xOutput.size(), 1);
pfs::Array2Df A2DY(yOutput.size(), 1);
pfs::Array2Df A2DZ(zOutput.size(), 1);
// function under unit test!
pfs::transformSRGB2XYZ(&A2DRed, &A2DGreen, &A2DBlue, &A2DX, &A2DY, &A2DZ);
print(A2DX);
print(xOutput);
print(A2DY);
print(yOutput);
print(A2DZ);
print(zOutput);
for (size_t idx = 0; idx < A2DY.size(); ++idx)
{
EXPECT_NEAR(xOutput[idx], A2DX(idx), 10e-6);
EXPECT_NEAR(yOutput[idx], A2DY(idx), 10e-6);
EXPECT_NEAR(zOutput[idx], A2DZ(idx), 10e-6);
}
}
TEST(TestSRGB2Y, TestSRGB2Y)
{
ColorSpaceSamples redInput;
ColorSpaceSamples greenInput;
ColorSpaceSamples blueInput;
ColorSpaceSamples yOutput;
redInput += 0.f, 1.f, 0.f, 0.f, 0.2f, 1.f, 1.2f, 1.2f, 2.f;
greenInput += 0.f, 0.f, 1.f, 0.f, 0.3f, 1.f, 0.f, 0.0f, 1.2f;
blueInput += 0.f, 0.f, 0.f, 1.f, 0.4f, 1.f, 0.f, 1.4f, 2.f;
yOutput += 0.f, 0.212673f, 0.715152f, 0.072175f, 0.069007f, 1.f, 0.322590f, 0.478708f, 2.495864;
ASSERT_TRUE( static_cast<bool>(yOutput.size()) );
ASSERT_EQ( yOutput.size(), blueInput.size() );
ASSERT_EQ( redInput.size(), blueInput.size() );
ASSERT_EQ( greenInput.size(), blueInput.size() );
pfs::Array2Df A2DRed(redInput.size(), 1);
pfs::Array2Df A2DGreen(greenInput.size(), 1);
pfs::Array2Df A2DBlue(blueInput.size(), 1);
pfs::Array2Df A2DY(yOutput.size(), 1);
std::copy(redInput.begin(), redInput.end(), A2DRed.begin());
std::copy(greenInput.begin(), greenInput.end(), A2DGreen.begin());
std::copy(blueInput.begin(), blueInput.end(), A2DBlue.begin());
// function under unit test!
pfs::transformSRGB2Y(&A2DRed, &A2DGreen, &A2DBlue,
&A2DY);
for (size_t idx = 0; idx < A2DY.size(); ++idx)
{
EXPECT_NEAR(yOutput[idx], A2DY(idx), 10e-6);
}
}
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