/*****************************************************************************
 *
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2015 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/feature.hpp>
#include <mapnik/debug.hpp>
#include <mapnik/image_any.hpp>
#include <mapnik/agg_renderer.hpp>
#include <mapnik/agg_rasterizer.hpp>
#include <mapnik/agg_pattern_source.hpp>
#include <mapnik/marker.hpp>
#include <mapnik/marker_cache.hpp>
#include <mapnik/symbolizer.hpp>
#include <mapnik/vertex_converters.hpp>
#include <mapnik/vertex_processor.hpp>
#include <mapnik/util/noncopyable.hpp>
#include <mapnik/parse_path.hpp>
#include <mapnik/renderer_common/clipping_extent.hpp>
#include <mapnik/renderer_common/render_pattern.hpp>
#include <mapnik/renderer_common/apply_vertex_converter.hpp>


#pragma GCC diagnostic push
#include <mapnik/warning_ignore_agg.hpp>
#include "agg_basics.h"
#include "agg_pixfmt_rgba.h"
#include "agg_color_rgba.h"
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_outline.h"
#include "agg_rasterizer_outline_aa.h"
#include "agg_scanline_u.h"
#include "agg_renderer_scanline.h"
#include "agg_pattern_filters_rgba.h"
#include "agg_span_allocator.h"
#include "agg_span_pattern_rgba.h"
#include "agg_renderer_outline_image.h"
#pragma GCC diagnostic pop

namespace mapnik {

template <typename buffer_type>
struct agg_renderer_process_visitor_l
{
    agg_renderer_process_visitor_l(renderer_common & common,
                                 buffer_type & pixmap,
                                 buffer_type * current_buffer,
                                 std::unique_ptr<rasterizer> const& ras_ptr,
                                 line_pattern_symbolizer const& sym,
                                 mapnik::feature_impl & feature,
                                 proj_transform const& prj_trans)
        : common_(common),
          pixmap_(pixmap),
          current_buffer_(current_buffer),
          ras_ptr_(ras_ptr),
          sym_(sym),
          feature_(feature),
          prj_trans_(prj_trans) {}

    void operator() (marker_null const&) const {}

    void operator() (marker_svg const& marker) const
    {
        agg::trans_affine image_tr = agg::trans_affine_scaling(common_.scale_factor_);
        auto image_transform = get_optional<transform_type>(sym_, keys::image_transform);
        if (image_transform) evaluate_transform(image_tr, feature_, common_.vars_, *image_transform, common_.scale_factor_);
        mapnik::box2d<double> const& bbox_image = marker.get_data()->bounding_box() * image_tr;
        image_rgba8 image(bbox_image.width(), bbox_image.height());
        render_pattern<buffer_type>(*ras_ptr_, marker, image_tr, 1.0, image);
        render(image, marker.width(), marker.height());
    }

    void operator() (marker_rgba8 const& marker) const
    {
        render(marker.get_data(), marker.width(), marker.height());
    }

private:
    void render(mapnik::image_rgba8 const& marker, double width, double height) const
    {
        using color = agg::rgba8;
        using order = agg::order_rgba;
        using blender_type = agg::comp_op_adaptor_rgba_pre<color, order>;
        using pattern_filter_type = agg::pattern_filter_bilinear_rgba8;
        using pattern_type = agg::line_image_pattern<pattern_filter_type>;
        using pixfmt_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
        using renderer_base = agg::renderer_base<pixfmt_type>;
        using renderer_type = agg::renderer_outline_image<renderer_base, pattern_type>;
        using rasterizer_type = agg::rasterizer_outline_aa<renderer_type>;

        value_double opacity = get<value_double, keys::opacity>(sym_, feature_, common_.vars_);
        value_bool clip = get<value_bool, keys::clip>(sym_, feature_, common_.vars_);
        value_double offset = get<value_double, keys::offset>(sym_, feature_, common_.vars_);
        value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym_, feature_, common_.vars_);
        value_double smooth = get<value_double, keys::smooth>(sym_, feature_, common_.vars_);

        agg::rendering_buffer buf(current_buffer_->bytes(),current_buffer_->width(),
                                  current_buffer_->height(), current_buffer_->row_size());
        pixfmt_type pixf(buf);
        pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e, keys::comp_op>(sym_, feature_, common_.vars_)));
        renderer_base ren_base(pixf);
        agg::pattern_filter_bilinear_rgba8 filter;

        pattern_source source(marker, opacity);
        pattern_type pattern (filter,source);
        renderer_type ren(ren_base, pattern);
        double half_stroke = std::max(width / 2.0, height / 2.0);
        int rast_clip_padding = static_cast<int>(std::round(half_stroke));
        ren.clip_box(-rast_clip_padding,-rast_clip_padding,common_.width_+rast_clip_padding,common_.height_+rast_clip_padding);
        rasterizer_type ras(ren);

        agg::trans_affine tr;
        auto transform = get_optional<transform_type>(sym_, keys::geometry_transform);
        if (transform) evaluate_transform(tr, feature_, common_.vars_, *transform, common_.scale_factor_);

        box2d<double> clip_box = clipping_extent(common_);
        if (clip)
        {
            double padding = (double)(common_.query_extent_.width()/pixmap_.width());
            if (half_stroke > 1)
                padding *= half_stroke;
            if (std::fabs(offset) > 0)
                padding *= std::fabs(offset) * 1.2;
            padding *= common_.scale_factor_;
            clip_box.pad(padding);
        }
        using vertex_converter_type = vertex_converter<clip_line_tag, transform_tag,
                                                       affine_transform_tag,
                                                       simplify_tag,smooth_tag,
                                                       offset_transform_tag>;

        vertex_converter_type converter(clip_box,sym_,common_.t_,prj_trans_,tr,feature_,common_.vars_,common_.scale_factor_);

        if (clip) converter.set<clip_line_tag>();
        converter.set<transform_tag>(); //always transform
        if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
        if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
        converter.set<affine_transform_tag>(); // optional affine transform
        if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter

        using apply_vertex_converter_type = detail::apply_vertex_converter<vertex_converter_type, rasterizer_type>;
        using vertex_processor_type = geometry::vertex_processor<apply_vertex_converter_type>;
        apply_vertex_converter_type apply(converter, ras);
        mapnik::util::apply_visitor(vertex_processor_type(apply), feature_.get_geometry());
    }

    renderer_common & common_;
    buffer_type & pixmap_;
    buffer_type * current_buffer_;
    std::unique_ptr<rasterizer> const& ras_ptr_;
    line_pattern_symbolizer const& sym_;
    mapnik::feature_impl & feature_;
    proj_transform const& prj_trans_;
};

template <typename T0, typename T1>
void  agg_renderer<T0,T1>::process(line_pattern_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{


    std::string filename = get<std::string, keys::file>(sym, feature, common_.vars_);
    if (filename.empty()) return;
    ras_ptr->reset();
    if (gamma_method_ != GAMMA_POWER || gamma_ != 1.0)
    {
        ras_ptr->gamma(agg::gamma_power());
        gamma_method_ = GAMMA_POWER;
        gamma_ = 1.0;
    }
    std::shared_ptr<mapnik::marker const> marker = marker_cache::instance().find(filename, true);
    agg_renderer_process_visitor_l<buffer_type> visitor(common_,
                                         pixmap_,
                                         current_buffer_,
                                         ras_ptr,
                                         sym,
                                         feature,
                                         prj_trans);
    util::apply_visitor(visitor, *marker);
}

template void agg_renderer<image_rgba8>::process(line_pattern_symbolizer const&,
                                              mapnik::feature_impl &,
                                              proj_transform const&);

}
