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mapnik/src/image_copy.cpp
Mathis Logemann e7c3d04309 format dir include and src 
format all files

Revert "format all files"

This reverts commit 95d5812e49e7f916b68e786596f5a8eb5bcac414.

Revert "format some files"

This reverts commit ed3c8762d4d828b2b28e7b18809fc33f4f8ccaf5.

format all files

fix formatting in dir include

fix formatting of debug macro
2022-01-27 00:12:08 +01:00

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9.6 KiB
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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2021 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
// mapnik
#include <mapnik/image_copy.hpp>
#include <mapnik/image.hpp>
#include <mapnik/image_any.hpp>
#include <mapnik/safe_cast.hpp>
namespace mapnik {
namespace detail {
template<typename T0>
struct visitor_image_copy
{
using dst_type = typename T0::pixel_type;
T0 operator()(image_null const&) const { throw std::runtime_error("Can not cast a null image"); }
T0 operator()(T0 const& src) { return T0(src); }
template<typename T1>
T0 operator()(T1 const& src) const
{
T0 dst(safe_cast<int>(src.width()), safe_cast<int>(src.height()), false);
for (std::size_t y = 0; y < dst.height(); ++y)
{
for (std::size_t x = 0; x < dst.width(); ++x)
{
dst(x, y) = safe_cast<dst_type>(src(x, y));
}
}
return T0(std::move(dst));
}
};
template<typename T0>
struct visitor_image_copy_so
{
using dst_type = typename T0::pixel_type;
visitor_image_copy_so(double offset, double scaling)
: offset_(offset)
, scaling_(scaling)
{}
T0 operator()(image_null const&) { throw std::runtime_error("Can not cast a null image"); }
T0 operator()(T0 const& src) const
{
if (offset_ == src.get_offset() && scaling_ == src.get_scaling())
{
return T0(src);
}
else
{
T0 dst(src);
dst.set_scaling(scaling_);
dst.set_offset(offset_);
return T0(std::move(dst));
}
}
template<typename T1>
T0 operator()(T1 const& src) const
{
double src_offset = src.get_offset();
double src_scaling = src.get_scaling();
T0 dst(safe_cast<int>(src.width()), safe_cast<int>(src.height()), false);
dst.set_scaling(scaling_);
dst.set_offset(offset_);
for (std::size_t y = 0; y < dst.height(); ++y)
{
for (std::size_t x = 0; x < dst.width(); ++x)
{
double scaled_src_val = (safe_cast<double>(src(x, y)) * src_scaling) + src_offset;
double dst_val = (scaled_src_val - offset_) / scaling_;
dst(x, y) = safe_cast<dst_type>(dst_val);
}
}
return T0(std::move(dst));
}
private:
double offset_;
double scaling_;
};
} // namespace detail
template<typename T>
MAPNIK_DECL T image_copy(image_any const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
return util::apply_visitor(detail::visitor_image_copy<T>(), data);
}
else
{
return util::apply_visitor(detail::visitor_image_copy_so<T>(offset, scaling), data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_rgba8 const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray8 const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray8s const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray16 const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray16s const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray32 const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray32s const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray32f const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray64 const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray64s const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
template<typename T>
MAPNIK_DECL T image_copy(image_gray64f const& data, double offset, double scaling)
{
if (offset == 0.0 && scaling == 1.0 && data.get_offset() == 0.0 && data.get_scaling() == 1.0)
{
detail::visitor_image_copy<T> visit;
return visit(data);
}
else
{
detail::visitor_image_copy_so<T> visit(offset, scaling);
return visit(data);
}
}
MAPNIK_DECL image_any image_copy(image_any const& data, image_dtype type, double offset, double scaling)
{
switch (type)
{
case image_dtype_rgba8:
return image_any(image_copy<image_rgba8>(data, offset, scaling));
case image_dtype_gray8:
return image_any(image_copy<image_gray8>(data, offset, scaling));
case image_dtype_gray8s:
return image_any(image_copy<image_gray8s>(data, offset, scaling));
case image_dtype_gray16:
return image_any(image_copy<image_gray16>(data, offset, scaling));
case image_dtype_gray16s:
return image_any(image_copy<image_gray16s>(data, offset, scaling));
case image_dtype_gray32:
return image_any(image_copy<image_gray32>(data, offset, scaling));
case image_dtype_gray32s:
return image_any(image_copy<image_gray32s>(data, offset, scaling));
case image_dtype_gray32f:
return image_any(image_copy<image_gray32f>(data, offset, scaling));
case image_dtype_gray64:
return image_any(image_copy<image_gray64>(data, offset, scaling));
case image_dtype_gray64s:
return image_any(image_copy<image_gray64s>(data, offset, scaling));
case image_dtype_gray64f:
return image_any(image_copy<image_gray64f>(data, offset, scaling));
case image_dtype_null:
throw std::runtime_error("Can not cast a null image");
case IMAGE_DTYPE_MAX:
default:
throw std::runtime_error("Can not cast unknown type");
}
throw std::runtime_error("Unknown image type passed");
}
} // namespace mapnik
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