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https://github.com/mapnik/mapnik.git
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233 lines
8.5 KiB
C++
233 lines
8.5 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) 2025 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_IMAGE_SCALING_TRAITS_HPP
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#define MAPNIK_IMAGE_SCALING_TRAITS_HPP
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// mapnik
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#include <mapnik/image.hpp>
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#include <mapnik/image_scaling.hpp>
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#include <mapnik/span_image_filter.hpp>
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#include <mapnik/warning.hpp>
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MAPNIK_DISABLE_WARNING_PUSH
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#include <mapnik/warning_ignore_agg.hpp>
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#include "agg_image_accessors.h"
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#include "agg_pixfmt_rgba.h"
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#include "agg_pixfmt_gray.h"
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#include "agg_span_allocator.h"
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#include "agg_span_image_filter_gray.h"
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#include "agg_span_image_filter_rgba.h"
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#include "agg_span_interpolator_linear.h"
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MAPNIK_DISABLE_WARNING_POP
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namespace mapnik {
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namespace detail {
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template<typename T>
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struct agg_scaling_traits
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{};
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template<>
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struct agg_scaling_traits<image_rgba8>
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{
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using pixfmt_pre = agg::pixfmt_rgba32_pre;
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using color_type = agg::rgba8;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_rgba_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_rgba_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray8>
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{
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using pixfmt_pre = agg::pixfmt_gray8_pre;
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using color_type = agg::gray8;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray8s>
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{
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using pixfmt_pre = agg::pixfmt_gray8_pre;
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using color_type = agg::gray8;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray16>
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{
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using pixfmt_pre = agg::pixfmt_gray16_pre;
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using color_type = agg::gray16;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray16s>
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{
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using pixfmt_pre = agg::pixfmt_gray16_pre;
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using color_type = agg::gray16;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray32>
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{
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using pixfmt_pre = agg::pixfmt_gray32_pre;
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using color_type = agg::gray32;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray32s>
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{
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using pixfmt_pre = agg::pixfmt_gray32_pre;
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using color_type = agg::gray32;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray32f>
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{
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using pixfmt_pre = agg::pixfmt_gray32_pre;
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using color_type = agg::gray32;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray64>
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{
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using pixfmt_pre = agg::pixfmt_gray32_pre;
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using color_type = agg::gray32;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray64s>
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{
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using pixfmt_pre = agg::pixfmt_gray32_pre;
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using color_type = agg::gray32;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<>
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struct agg_scaling_traits<image_gray64f>
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{
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using pixfmt_pre = agg::pixfmt_gray32_pre;
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using color_type = agg::gray32;
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using interpolator_type = agg::span_interpolator_linear<>;
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using img_src_type = agg::image_accessor_clone<pixfmt_pre>;
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using span_image_filter = agg::span_image_filter_gray_nn<img_src_type, interpolator_type>;
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using span_image_resample_affine = span_image_resample_gray_affine<img_src_type>;
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};
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template<typename Filter>
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void set_scaling_method(Filter& filter, scaling_method_e scaling_method, double filter_factor)
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{
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switch (scaling_method)
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{
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case SCALING_BILINEAR:
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filter.calculate(agg::image_filter_bilinear(), true);
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break;
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case SCALING_BICUBIC:
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filter.calculate(agg::image_filter_bicubic(), true);
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break;
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case SCALING_SPLINE16:
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filter.calculate(agg::image_filter_spline16(), true);
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break;
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case SCALING_SPLINE36:
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filter.calculate(agg::image_filter_spline36(), true);
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break;
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case SCALING_HANNING:
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filter.calculate(agg::image_filter_hanning(), true);
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break;
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case SCALING_HAMMING:
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filter.calculate(agg::image_filter_hamming(), true);
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break;
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case SCALING_HERMITE:
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filter.calculate(agg::image_filter_hermite(), true);
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break;
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case SCALING_KAISER:
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filter.calculate(agg::image_filter_kaiser(), true);
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break;
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case SCALING_QUADRIC:
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filter.calculate(agg::image_filter_quadric(), true);
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break;
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case SCALING_CATROM:
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filter.calculate(agg::image_filter_catrom(), true);
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break;
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case SCALING_GAUSSIAN:
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filter.calculate(agg::image_filter_gaussian(), true);
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break;
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case SCALING_BESSEL:
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filter.calculate(agg::image_filter_bessel(), true);
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break;
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case SCALING_MITCHELL:
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filter.calculate(agg::image_filter_mitchell(), true);
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break;
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case SCALING_SINC:
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filter.calculate(agg::image_filter_sinc(filter_factor), true);
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break;
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case SCALING_LANCZOS:
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filter.calculate(agg::image_filter_lanczos(filter_factor), true);
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break;
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case SCALING_BLACKMAN:
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filter.calculate(agg::image_filter_blackman(filter_factor), true);
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break;
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default:
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break;
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}
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}
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} // namespace detail
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} // namespace mapnik
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#endif // MAPNIK_IMAGE_SCALING_TRAITS_HPP
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