61 lines
No EOL
2.1 KiB
C++
61 lines
No EOL
2.1 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2015 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_CONST_RENDERING_BUFFER_HPP
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#define MAPNIK_CONST_RENDERING_BUFFER_HPP
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#include <mapnik/safe_cast.hpp>
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#pragma GCC diagnostic push
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#include <mapnik/warning_ignore_agg.hpp>
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#include "agg_basics.h"
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#pragma GCC diagnostic pop
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#include <cstdint>
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namespace mapnik { namespace util {
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// non-mutable rendering_buffer implementation
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template <typename T>
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struct rendering_buffer
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{
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using image_type = T;
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using pixel_type = typename image_type::pixel_type;
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using row_data = agg::const_row_info<uint8_t>;
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rendering_buffer(T const& data)
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: data_(data) {}
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uint8_t const* buf() const { return data_.bytes(); }
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std::size_t width() const { return data_.width();}
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std::size_t height() const { return data_.height();}
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int stride() const { return data_.row_size();}
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uint8_t const* row_ptr(int, int y, unsigned) {return row_ptr(y);}
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uint8_t const* row_ptr(int y) const { return reinterpret_cast<std::uint8_t const*>(data_.get_row(static_cast<std::size_t>(y))); }
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row_data row (int y) const { return row_data(0, safe_cast<int>(data_.width() - 1), row_ptr(y)); }
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image_type const& data_;
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};
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}}
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#endif // MAPNIK_CONST_RENDERING_BUFFER_HPP
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