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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "otbImageRegionSquareTileSplitter.h"
#include <fstream>
const int Dimension = 2;
typedef otb::ImageRegionSquareTileSplitter<Dimension> SquareTileSplitterType;
typedef SquareTileSplitterType::IndexType IndexType;
typedef SquareTileSplitterType::SizeType SizeType;
typedef SquareTileSplitterType::RegionType RegionType;
int TestSplitter(const RegionType& region, unsigned int PixelSize, unsigned int MaxTileSize, std::ostream& os)
{
os << "----------------------------------" << std::endl;
os << "Region : " << region << std::endl;
os << "PixelSize : " << PixelSize << std::endl;
os << "MaxTileSize : " << MaxTileSize << std::endl;
SquareTileSplitterType::Pointer splitter;
splitter = SquareTileSplitterType::New();
unsigned int requestedNbSplits = region.GetNumberOfPixels() * PixelSize / MaxTileSize;
if (requestedNbSplits == 0)
requestedNbSplits = 1;
os << "Requested Number of splits : " << requestedNbSplits << std::endl;
const unsigned int nbSplits = splitter->GetNumberOfSplits(region, requestedNbSplits);
os << "Actual Number of splits : " << nbSplits << std::endl;
RegionType split;
// First split :
split = splitter->GetSplit(0, nbSplits, region);
os << "First Split : " << split << "(" << split.GetNumberOfPixels() * PixelSize << " bytes)" << std::endl;
if (nbSplits > 1)
{
// Second split :
split = splitter->GetSplit(1, nbSplits, region);
os << "Second Split : " << split << "(" << split.GetNumberOfPixels() * PixelSize << " bytes)" << std::endl;
}
if (nbSplits > 2)
{
// Last split :
split = splitter->GetSplit(nbSplits - 1, nbSplits, region);
os << "Last Split : " << split << "(" << split.GetNumberOfPixels() * PixelSize << " bytes)" << std::endl;
}
return EXIT_SUCCESS;
}
int otbImageRegionSquareTileSplitter(int itkNotUsed(argc), char* argv[])
{
std::ofstream outfile(argv[1]);
RegionType region;
// Test with a 0-based indexed region
region.SetIndex(0, 0);
region.SetIndex(1, 0);
region.SetSize(0, 1024);
region.SetSize(1, 1024);
TestSplitter(region, 1, 128, outfile);
TestSplitter(region, 1, 512 * 512, outfile);
TestSplitter(region, 2, 512 * 512, outfile);
TestSplitter(region, 4, 512 * 512, outfile);
TestSplitter(region, 8, 512 * 512, outfile);
// Test with a shifted region
region.SetIndex(0, 42);
region.SetIndex(1, 42);
region.SetSize(0, 1000);
region.SetSize(1, 1000);
TestSplitter(region, 1, 128, outfile);
TestSplitter(region, 1, 512 * 512, outfile);
TestSplitter(region, 2, 512 * 512, outfile);
TestSplitter(region, 4, 512 * 512, outfile);
TestSplitter(region, 8, 512 * 512, outfile);
// Test with a negative shift
region.SetIndex(0, -42);
region.SetIndex(1, -42);
region.SetSize(0, 1000);
region.SetSize(1, 1000);
TestSplitter(region, 1, 128, outfile);
TestSplitter(region, 1, 512 * 512, outfile);
TestSplitter(region, 2, 512 * 512, outfile);
TestSplitter(region, 4, 512 * 512, outfile);
TestSplitter(region, 8, 512 * 512, outfile);
// Test with a reduced size
region.SetIndex(0, 0);
region.SetIndex(1, 0);
region.SetSize(0, 1);
region.SetSize(1, 1);
TestSplitter(region, 1, 128, outfile);
TestSplitter(region, 1, 512 * 512, outfile);
TestSplitter(region, 2, 512 * 512, outfile);
TestSplitter(region, 4, 512 * 512, outfile);
TestSplitter(region, 8, 512 * 512, outfile);
// Test with a reduced size, shifted
region.SetIndex(0, 42);
region.SetIndex(1, 42);
region.SetSize(0, 1);
region.SetSize(1, 1);
TestSplitter(region, 1, 128, outfile);
TestSplitter(region, 1, 512 * 512, outfile);
TestSplitter(region, 2, 512 * 512, outfile);
TestSplitter(region, 4, 512 * 512, outfile);
TestSplitter(region, 8, 512 * 512, outfile);
outfile.close();
return EXIT_SUCCESS;
}
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