/usr/include/vigra/impexbase.hxx is in libvigraimpex-dev 1.10.0+git20160211.167be93+dfsg-2+b5.
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/* */
/* Copyright 2012 Christoph Spiel */
/* */
/* This file is part of the VIGRA computer vision library. */
/* The VIGRA Website is */
/* http://hci.iwr.uni-heidelberg.de/vigra/ */
/* Please direct questions, bug reports, and contributions to */
/* ullrich.koethe@iwr.uni-heidelberg.de or */
/* vigra@informatik.uni-hamburg.de */
/* */
/* Permission is hereby granted, free of charge, to any person */
/* obtaining a copy of this software and associated documentation */
/* files (the "Software"), to deal in the Software without */
/* restriction, including without limitation the rights to use, */
/* copy, modify, merge, publish, distribute, sublicense, and/or */
/* sell copies of the Software, and to permit persons to whom the */
/* Software is furnished to do so, subject to the following */
/* conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the */
/* Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES */
/* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND */
/* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT */
/* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, */
/* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING */
/* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR */
/* OTHER DEALINGS IN THE SOFTWARE. */
/* */
/************************************************************************/
#ifndef VIGRA_IMPEXBASE_HXX
#define VIGRA_IMPEXBASE_HXX
#include <string>
#include "inspectimage.hxx"
#include "sized_int.hxx"
#include "utilities.hxx"
namespace vigra
{
typedef enum
{
UNSIGNED_INT_8,
UNSIGNED_INT_16,
UNSIGNED_INT_32,
SIGNED_INT_16,
SIGNED_INT_32,
IEEE_FLOAT_32,
IEEE_FLOAT_64
} pixel_t;
namespace detail
{
inline static pixel_t
pixel_t_of_string(const std::string& pixel_type)
{
if (pixel_type == "BILEVEL")
{
return UNSIGNED_INT_8;
}
else if (pixel_type == "UINT8")
{
return UNSIGNED_INT_8;
}
else if (pixel_type == "UINT16")
{
return UNSIGNED_INT_16;
}
else if (pixel_type == "UINT32")
{
return UNSIGNED_INT_32;
}
else if (pixel_type == "INT16")
{
return SIGNED_INT_16;
}
else if (pixel_type == "INT32")
{
return SIGNED_INT_32;
}
else if (pixel_type == "FLOAT")
{
return IEEE_FLOAT_32;
}
else if (pixel_type == "DOUBLE")
{
return IEEE_FLOAT_64;
}
else
{
vigra_fail("vigra_ext::detail::pixel_t_of_string: unknown pixel type");
return UNSIGNED_INT_8; // NOT REACHED
}
}
struct identity
{
template <typename T>
T operator()(T x) const
{
return x;
}
};
typedef pair<double, double> range_t;
class linear_transform
{
public:
linear_transform(const range_t& source, const range_t& destination) :
scale_((destination.second - destination.first) / (source.second - source.first)),
offset_(destination.first / scale_ - source.first)
{}
template <typename T>
double operator()(T x) const
{
return scale_ * (static_cast<double>(x) + offset_);
}
private:
const double scale_;
const double offset_;
};
template <class Iterator, class Accessor>
inline static range_t
find_value_range(Iterator upper_left, Iterator lower_right, Accessor accessor,
/* is_scalar? */ VigraTrueType)
{
typedef typename Accessor::value_type value_type;
FindMinMax<value_type> extrema;
inspectImage(upper_left, lower_right, accessor, extrema);
return range_t(static_cast<double>(extrema.min), static_cast<double>(extrema.max));
}
template <class Iterator, class Accessor>
inline static range_t
find_value_range(Iterator upper_left, Iterator lower_right, Accessor accessor,
/* is_scalar? */ VigraFalseType)
{
typedef typename Accessor::ElementAccessor element_accessor;
typedef typename element_accessor::value_type value_type;
const int number_of_bands(static_cast<int>(accessor.size(upper_left)));
FindMinMax<value_type> extrema;
for (int i = 0; i != number_of_bands; ++i)
{
element_accessor band(i, accessor);
inspectImage(upper_left, lower_right, band, extrema);
}
return range_t(static_cast<double>(extrema.min), static_cast<double>(extrema.max));
}
template <class SourceIterator, class SourceAccessor>
inline static range_t
find_source_value_range(const ImageExportInfo& export_info,
SourceIterator upper_left, SourceIterator lower_right, SourceAccessor accessor)
{
if (export_info.getFromMin() < export_info.getFromMax())
{
return range_t(export_info.getFromMin(), export_info.getFromMax());
}
else
{
typedef typename SourceAccessor::value_type SourceValueType;
typedef typename NumericTraits<SourceValueType>::isScalar is_scalar;
const range_t range(find_value_range(upper_left, lower_right, accessor, is_scalar()));
if (range.first < range.second)
{
return range_t(range.first, range.second);
}
else
{
return range_t(range.first, range.first + 1.0);
}
}
}
template <typename T>
inline static range_t
find_destination_value_range(const ImageExportInfo& export_info)
{
if (export_info.getToMin() < export_info.getToMax())
{
return range_t(export_info.getToMin(), export_info.getToMax());
}
else
{
return range_t(static_cast<double>(NumericTraits<T>::min()),
static_cast<double>(NumericTraits<T>::max()));
}
}
inline static range_t
find_destination_value_range(const ImageExportInfo& export_info, pixel_t pixel_type)
{
switch (pixel_type)
{
case UNSIGNED_INT_8: return find_destination_value_range<UInt8>(export_info);
case UNSIGNED_INT_16: return find_destination_value_range<UInt16>(export_info);
case UNSIGNED_INT_32: return find_destination_value_range<UInt32>(export_info);
case SIGNED_INT_16: return find_destination_value_range<Int16>(export_info);
case SIGNED_INT_32: return find_destination_value_range<Int32>(export_info);
case IEEE_FLOAT_32: return find_destination_value_range<float>(export_info);
case IEEE_FLOAT_64: return find_destination_value_range<double>(export_info);
default:
vigra_fail("vigra_ext::detail::find_destination_value_range: not reached");
return range_t(0.0, 0.0); // NOT REACHED
}
}
} // end namespace detail
} // end namespace vigra
#endif // VIGRA_IMPEXBASE_HXX
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