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Polygon pattern on line geometries for Cairo backend

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This commit is contained in:
Jiri Drbalek 2018-09-17 15:59:21 +00:00
parent 18c1a99604
commit d823378260
3 changed files with 324 additions and 161 deletions
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174
include/mapnik/cairo/render_polygon_pattern.hpp Normal file
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@ -0,0 +1,174 @@
/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2017 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
*
*****************************************************************************/
#ifndef MAPNIK_CAIRO_RENDER_POLYGON_PATTERN_HPP
#define MAPNIK_CAIRO_RENDER_POLYGON_PATTERN_HPP
#include <mapnik/symbolizer.hpp>
#include <mapnik/vertex_processor.hpp>
#include <mapnik/vertex_converters.hpp>
#include <mapnik/renderer_common/pattern_alignment.hpp>
#include <mapnik/renderer_common/render_pattern.hpp>
#include <mapnik/renderer_common/apply_vertex_converter.hpp>
#include <mapnik/renderer_common/clipping_extent.hpp>
#include <mapnik/agg_rasterizer.hpp>
#include <mapnik/marker.hpp>
namespace mapnik {
struct cairo_renderer_process_visitor_p
{
cairo_renderer_process_visitor_p(cairo_context & context,
agg::trans_affine & image_tr,
unsigned offset_x,
unsigned offset_y,
float opacity)
: context_(context),
image_tr_(image_tr),
offset_x_(offset_x),
offset_y_(offset_y),
opacity_(opacity) {}
void operator() (marker_null const&) {}
void operator() (marker_svg const& marker)
{
mapnik::rasterizer ras;
mapnik::box2d<double> const& bbox_image = marker.get_data()->bounding_box() * image_tr_;
mapnik::image_rgba8 image(bbox_image.width(), bbox_image.height());
render_pattern<image_rgba8>(ras, marker, image_tr_, 1.0, image);
cairo_pattern pattern(image, opacity_);
pattern.set_extend(CAIRO_EXTEND_REPEAT);
pattern.set_origin(offset_x_, offset_y_);
context_.set_pattern(pattern);
}
void operator() (marker_rgba8 const& marker)
{
cairo_pattern pattern(marker.get_data(), opacity_);
pattern.set_extend(CAIRO_EXTEND_REPEAT);
pattern.set_origin(offset_x_, offset_y_);
context_.set_pattern(pattern);
}
private:
cairo_context & context_;
agg::trans_affine & image_tr_;
unsigned offset_x_;
unsigned offset_y_;
float opacity_;
};
struct cairo_pattern_base
{
mapnik::marker const& marker_;
renderer_common const& common_;
symbolizer_base const& sym_;
mapnik::feature_impl const& feature_;
proj_transform const& prj_trans_;
agg::trans_affine geom_transform() const
{
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_);
}
return tr;
}
};
template <typename VertexConverter>
struct cairo_polygon_pattern : cairo_pattern_base
{
cairo_polygon_pattern(mapnik::marker const& marker,
renderer_common const& common,
symbolizer_base const& sym,
mapnik::feature_impl const& feature,
proj_transform const& prj_trans)
: cairo_pattern_base{marker, common, sym, feature, prj_trans},
clip_(get<value_bool, keys::clip>(sym_, feature_, common_.vars_)),
clip_box_(clipping_extent(common)),
tr_(geom_transform()),
converter_(clip_box_, sym, common.t_, prj_trans, tr_,
feature, common.vars_, common.scale_factor_)
{
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_);
converter_.template set<affine_transform_tag>();
if (simplify_tolerance > 0.0) converter_.template set<simplify_tag>();
if (smooth > 0.0) converter_.template set<smooth_tag>();
}
void render(cairo_fill_rule_t fill_rule, cairo_context & context)
{
unsigned offset_x=0;
unsigned offset_y=0;
pattern_alignment_enum alignment = get<pattern_alignment_enum, keys::alignment>(sym_, feature_, common_.vars_);
if (alignment == LOCAL_ALIGNMENT)
{
double x0 = 0.0;
double y0 = 0.0;
using apply_local_alignment = detail::apply_local_alignment;
apply_local_alignment apply(common_.t_, prj_trans_, clip_box_, x0, y0);
util::apply_visitor(geometry::vertex_processor<apply_local_alignment>(apply), feature_.get_geometry());
offset_x = std::abs(clip_box_.width() - x0);
offset_y = std::abs(clip_box_.height() - y0);
}
value_double opacity = get<value_double, keys::opacity>(sym_, feature_, common_.vars_);
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_);
}
composite_mode_e comp_op = get<composite_mode_e, keys::comp_op>(sym_, feature_, common_.vars_);
cairo_save_restore guard(context);
context.set_operator(comp_op);
util::apply_visitor(cairo_renderer_process_visitor_p(
context, image_tr, offset_x, offset_y, opacity), marker_);
using apply_vertex_converter_type = detail::apply_vertex_converter<VertexConverter, cairo_context>;
using vertex_processor_type = geometry::vertex_processor<apply_vertex_converter_type>;
apply_vertex_converter_type apply(converter_, context);
mapnik::util::apply_visitor(vertex_processor_type(apply),feature_.get_geometry());
// fill polygon
context.set_fill_rule(fill_rule);
context.fill();
}
const bool clip_;
const box2d<double> clip_box_;
const agg::trans_affine tr_;
VertexConverter converter_;
};
} // namespace mapnik
#endif // MAPNIK_CAIRO_RENDER_POLYGON_PATTERN_HPP

214
src/cairo/process_line_pattern_symbolizer.cpp
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@ -27,6 +27,7 @@
#include <mapnik/feature.hpp>
#include <mapnik/proj_transform.hpp>
#include <mapnik/cairo/cairo_renderer.hpp>
#include <mapnik/cairo/render_polygon_pattern.hpp>
#include <mapnik/renderer_common/render_pattern.hpp>
#include <mapnik/vertex_converters.hpp>
#include <mapnik/vertex_processor.hpp>
@ -40,13 +41,16 @@
namespace mapnik
{
struct cairo_renderer_process_visitor_l
namespace
{
cairo_renderer_process_visitor_l(renderer_common const& common,
line_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
std::size_t & width,
std::size_t & height)
struct prepare_pattern_visitor
{
prepare_pattern_visitor(renderer_common const& common,
symbolizer_base const& sym,
feature_impl const& feature,
std::size_t & width,
std::size_t & height)
: common_(common),
sym_(sym),
feature_(feature),
@ -81,86 +85,156 @@ struct cairo_renderer_process_visitor_l
private:
renderer_common const& common_;
line_pattern_symbolizer const& sym_;
mapnik::feature_impl & feature_;
symbolizer_base const& sym_;
feature_impl const& feature_;
std::size_t & width_;
std::size_t & height_;
};
template <typename... Converters>
using vertex_converter_type = vertex_converter<clip_line_tag,
transform_tag,
affine_transform_tag,
simplify_tag,
smooth_tag,
offset_transform_tag,
Converters...>;
struct warp_pattern : cairo_pattern_base
{
using vc_type = vertex_converter_type<>;
warp_pattern(mapnik::marker const& marker,
renderer_common const& common,
symbolizer_base const& sym,
mapnik::feature_impl const& feature,
proj_transform const& prj_trans)
: cairo_pattern_base{marker, common, sym, feature, prj_trans},
clip_(get<value_bool, keys::clip>(sym, feature, common.vars_)),
offset_(get<value_double, keys::offset>(sym, feature, common.vars_)),
clip_box_(clipping_extent(common)),
tr_(geom_transform()),
converter_(clip_box_, sym, common.t_, prj_trans, tr_,
feature, common.vars_, common.scale_factor_)
{
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_);
if (std::fabs(offset) > 0.0) converter_.template set<offset_transform_tag>();
converter_.template set<affine_transform_tag>();
if (simplify_tolerance > 0.0) converter_.template set<simplify_tag>();
if (smooth > 0.0) converter_.template set<smooth_tag>();
if (clip_) converter_.template set<clip_line_tag>();
}
box2d<double> clip_box() const
{
box2d<double> clipping_extent = common_.query_extent_;
if (clip_)
{
double pad_per_pixel = static_cast<double>(common_.query_extent_.width() / common_.width_);
double pixels = std::ceil(std::max(marker_.width() / 2.0 + std::fabs(offset_),
(std::fabs(offset_) * offset_converter_default_threshold)));
double padding = pad_per_pixel * pixels * common_.scale_factor_;
clipping_extent.pad(padding);
}
return clipping_extent;
}
void render(cairo_context & context)
{
std::size_t width = marker_.width();
std::size_t height = marker_.height();
// TODO - re-implement at renderer level like polygon_pattern symbolizer
prepare_pattern_visitor visit(common_, sym_, feature_, width, height);
std::shared_ptr<cairo_pattern> pattern = util::apply_visitor(visit, marker_);
pattern->set_extend(CAIRO_EXTEND_REPEAT);
pattern->set_filter(CAIRO_FILTER_BILINEAR);
composite_mode_e comp_op = get<composite_mode_e, keys::comp_op>(sym_, feature_, common_.vars_);
cairo_save_restore guard(context);
context.set_operator(comp_op);
context.set_line_width(height);
using rasterizer_type = line_pattern_rasterizer<cairo_context>;
rasterizer_type ras(context, *pattern, width, height);
using apply_vertex_converter_type = detail::apply_vertex_converter<
vc_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());
}
const bool clip_;
const double offset_;
const box2d<double> clip_box_;
const agg::trans_affine tr_;
vc_type converter_;
};
using repeat_pattern_base = cairo_polygon_pattern<vertex_converter_type<dash_tag,
stroke_tag>>;
struct repeat_pattern : repeat_pattern_base
{
using repeat_pattern_base::cairo_polygon_pattern;
void render(cairo_context & context)
{
if (has_key(sym_, keys::stroke_dasharray))
{
converter_.template set<dash_tag>();
}
if (clip_) converter_.template set<clip_line_tag>();
value_double offset = get<value_double, keys::offset>(sym_, feature_, common_.vars_);
if (std::fabs(offset) > 0.0) converter_.template set<offset_transform_tag>();
repeat_pattern_base::render(CAIRO_FILL_RULE_WINDING, context);
}
};
}
template <typename T>
void cairo_renderer<T>::process(line_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
feature_impl & feature,
proj_transform const& prj_trans)
{
std::string filename = get<std::string, keys::file>(sym, feature, common_.vars_);
composite_mode_e comp_op = get<composite_mode_e, keys::comp_op>(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_);
std::shared_ptr<mapnik::marker const> marker = marker_cache::instance().find(filename, true);
if (filename.empty())
if (marker->is<mapnik::marker_null>())
{
return;
}
std::shared_ptr<mapnik::marker const> marker = marker_cache::instance().find(filename, true);
if (marker->is<mapnik::marker_null>()) return;
std::size_t width = marker->width();
std::size_t height = marker->height();
cairo_save_restore guard(context_);
context_.set_operator(comp_op);
// TODO - re-implement at renderer level like polygon_pattern symbolizer
cairo_renderer_process_visitor_l visit(common_,
sym,
feature,
width,
height);
std::shared_ptr<cairo_pattern> pattern = util::apply_visitor(visit, *marker);
context_.set_line_width(height);
pattern->set_extend(CAIRO_EXTEND_REPEAT);
pattern->set_filter(CAIRO_FILTER_BILINEAR);
agg::trans_affine tr;
auto geom_transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (geom_transform) { evaluate_transform(tr, feature, common_.vars_, *geom_transform, common_.scale_factor_); }
box2d<double> clipping_extent = common_.query_extent_;
if (clip)
line_pattern_enum pattern = get<line_pattern_enum, keys::line_pattern>(sym, feature, common_.vars_);
switch (pattern)
{
double pad_per_pixel = static_cast<double>(common_.query_extent_.width()/common_.width_);
double pixels = std::ceil(std::max(width / 2.0 + std::fabs(offset),
(std::fabs(offset) * offset_converter_default_threshold)));
double padding = pad_per_pixel * pixels * common_.scale_factor_;
clipping_extent.pad(padding);
case LINE_PATTERN_WARP:
{
warp_pattern pattern(*marker, common_, sym, feature, prj_trans);
pattern.render(context_);
break;
}
case LINE_PATTERN_REPEAT:
{
repeat_pattern pattern(*marker, common_, sym, feature, prj_trans);
pattern.render(context_);
break;
}
case line_pattern_enum_MAX:
default:
MAPNIK_LOG_ERROR(process_line_pattern_symbolizer) << "Incorrect line-pattern value.";
}
using rasterizer_type = line_pattern_rasterizer<cairo_context>;
rasterizer_type ras(context_, *pattern, width, height);
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(clipping_extent,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 (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
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());
}
template void cairo_renderer<cairo_ptr>::process(line_pattern_symbolizer const&,

97
src/cairo/process_polygon_pattern_symbolizer.cpp
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@ -27,123 +27,38 @@
#include <mapnik/proj_transform.hpp>
#include <mapnik/cairo/cairo_renderer.hpp>
#include <mapnik/cairo/cairo_render_vector.hpp>
#include <mapnik/renderer_common/render_pattern.hpp>
#include <mapnik/cairo/render_polygon_pattern.hpp>
#include <mapnik/vertex_converters.hpp>
#include <mapnik/vertex_processor.hpp>
#include <mapnik/marker.hpp>
#include <mapnik/marker_cache.hpp>
#include <mapnik/agg_rasterizer.hpp>
#include <mapnik/renderer_common/clipping_extent.hpp>
#include <mapnik/renderer_common/apply_vertex_converter.hpp>
#include <mapnik/renderer_common/pattern_alignment.hpp>
namespace mapnik
{
struct cairo_renderer_process_visitor_p
{
cairo_renderer_process_visitor_p(cairo_context & context,
agg::trans_affine & image_tr,
unsigned offset_x,
unsigned offset_y,
float opacity)
: context_(context),
image_tr_(image_tr),
offset_x_(offset_x),
offset_y_(offset_y),
opacity_(opacity) {}
void operator() (marker_null const&) {}
void operator() (marker_svg const& marker)
{
mapnik::rasterizer ras;
mapnik::box2d<double> const& bbox_image = marker.get_data()->bounding_box() * image_tr_;
mapnik::image_rgba8 image(bbox_image.width(), bbox_image.height());
render_pattern<image_rgba8>(ras, marker, image_tr_, 1.0, image);
cairo_pattern pattern(image, opacity_);
pattern.set_extend(CAIRO_EXTEND_REPEAT);
pattern.set_origin(offset_x_, offset_y_);
context_.set_pattern(pattern);
}
void operator() (marker_rgba8 const& marker)
{
cairo_pattern pattern(marker.get_data(), opacity_);
pattern.set_extend(CAIRO_EXTEND_REPEAT);
pattern.set_origin(offset_x_, offset_y_);
context_.set_pattern(pattern);
}
private:
cairo_context & context_;
agg::trans_affine & image_tr_;
unsigned offset_x_;
unsigned offset_y_;
float opacity_;
};
template <typename T>
void cairo_renderer<T>::process(polygon_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
composite_mode_e comp_op = get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_);
std::string filename = get<std::string, keys::file>(sym, feature, common_.vars_);
value_bool clip = get<value_bool, keys::clip>(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_);
value_double opacity = get<value_double, keys::opacity>(sym, feature, common_.vars_);
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_);
cairo_save_restore guard(context_);
context_.set_operator(comp_op);
std::shared_ptr<mapnik::marker const> marker = mapnik::marker_cache::instance().find(filename,true);
if (marker->is<mapnik::marker_null>()) return;
unsigned offset_x=0;
unsigned offset_y=0;
box2d<double> const& clip_box = clipping_extent(common_);
pattern_alignment_enum alignment = get<pattern_alignment_enum, keys::alignment>(sym, feature, common_.vars_);
if (alignment == LOCAL_ALIGNMENT)
{
double x0 = 0.0;
double y0 = 0.0;
using apply_local_alignment = detail::apply_local_alignment;
apply_local_alignment apply(common_.t_, prj_trans, clip_box, x0, y0);
util::apply_visitor(geometry::vertex_processor<apply_local_alignment>(apply), feature.get_geometry());
offset_x = std::abs(clip_box.width() - x0);
offset_y = std::abs(clip_box.height() - y0);
}
util::apply_visitor(cairo_renderer_process_visitor_p(context_, image_tr, offset_x, offset_y, opacity), *marker);
agg::trans_affine tr;
auto geom_transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (geom_transform) { evaluate_transform(tr, feature, common_.vars_, *geom_transform, common_.scale_factor_); }
using vertex_converter_type = vertex_converter<clip_poly_tag,
transform_tag,
affine_transform_tag,
simplify_tag,
smooth_tag>;
using pattern_type = cairo_polygon_pattern<vertex_converter_type>;
vertex_converter_type converter(clip_box,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
if (prj_trans.equal() && clip) converter.set<clip_poly_tag>();
converter.set<transform_tag>(); //always transform
converter.set<affine_transform_tag>();
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
pattern_type pattern(*marker, common_, sym, feature, prj_trans);
using apply_vertex_converter_type = detail::apply_vertex_converter<vertex_converter_type, cairo_context>;
using vertex_processor_type = geometry::vertex_processor<apply_vertex_converter_type>;
apply_vertex_converter_type apply(converter, context_);
mapnik::util::apply_visitor(vertex_processor_type(apply),feature.get_geometry());
// fill polygon
context_.set_fill_rule(CAIRO_FILL_RULE_EVEN_ODD);
context_.fill();
if (prj_trans.equal() && pattern.clip_) pattern.converter_.set<clip_poly_tag>();
pattern.render(CAIRO_FILL_RULE_EVEN_ODD, context_);
}
template void cairo_renderer<cairo_ptr>::process(polygon_pattern_symbolizer const&,