sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
mapnik/src/agg/process_markers_symbolizer.cpp
artemp 5541ea0271 + layer : minimum-extent and buffer-size 
+ agg::process_xxx : remove ad-hoc query_extent modifiers
+ ctrans : simplify vertex skipping
2012-08-01 15:44:36 +01:00

456 lines
20 KiB
C++
Raw Blame History

/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2011 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/debug.hpp>
#include <mapnik/graphics.hpp>
#include <mapnik/geom_util.hpp>
#include <mapnik/agg_renderer.hpp>
#include <mapnik/agg_rasterizer.hpp>
#include <mapnik/expression_evaluator.hpp>
#include <mapnik/vertex_converters.hpp>
#include <mapnik/marker.hpp>
#include <mapnik/marker_cache.hpp>
#include <mapnik/marker_helpers.hpp>
#include <mapnik/svg/svg_renderer.hpp>
#include <mapnik/svg/svg_storage.hpp>
#include <mapnik/svg/svg_path_adapter.hpp>
#include <mapnik/svg/svg_path_attributes.hpp>
#include <mapnik/markers_placement.hpp>
#include <mapnik/markers_symbolizer.hpp>
// agg
#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_pixfmt_rgba.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_scanline_u.h"
#include "agg_path_storage.h"
#include "agg_conv_clip_polyline.h"
#include "agg_conv_transform.h"
#include "agg_image_filters.h"
#include "agg_trans_bilinear.h"
#include "agg_span_allocator.h"
#include "agg_image_accessors.h"
#include "agg_span_image_filter_rgba.h"
// boost
#include <boost/optional.hpp>
namespace mapnik {
template <typename BufferType, typename SvgRenderer, typename Rasterizer, typename Detector>
struct vector_markers_rasterizer_dispatch
{
typedef agg::rgba8 color_type;
typedef agg::order_rgba order_type;
typedef agg::pixel32_type pixel_type;
typedef agg::comp_op_adaptor_rgba_pre<color_type, order_type> blender_type; // comp blender
typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_comp_type;
typedef agg::renderer_base<pixfmt_comp_type> renderer_base;
vector_markers_rasterizer_dispatch(BufferType & image_buffer,
SvgRenderer & svg_renderer,
Rasterizer & ras,
box2d<double> const& bbox,
agg::trans_affine const& marker_trans,
markers_symbolizer const& sym,
Detector & detector,
double scale_factor)
: buf_(image_buffer.raw_data(), image_buffer.width(), image_buffer.height(), image_buffer.width() * 4),
pixf_(buf_),
renb_(pixf_),
svg_renderer_(svg_renderer),
ras_(ras),
bbox_(bbox),
marker_trans_(marker_trans),
sym_(sym),
detector_(detector),
scale_factor_(scale_factor)
{
pixf_.comp_op(static_cast<agg::comp_op_e>(sym_.comp_op()));
}
template <typename T>
void add_path(T & path)
{
marker_placement_e placement_method = sym_.get_marker_placement();
if (placement_method != MARKER_LINE_PLACEMENT)
{
double x,y;
path.rewind(0);
if (placement_method == MARKER_INTERIOR_PLACEMENT)
{
label::interior_position(path, x, y);
}
else
{
label::centroid(path, x, y);
}
agg::trans_affine matrix = marker_trans_;
matrix.translate(x,y);
box2d<double> transformed_bbox = bbox_ * matrix;
if (sym_.get_allow_overlap() ||
detector_.has_placement(transformed_bbox))
{
svg_renderer_.render(ras_, sl_, renb_, matrix, 1, bbox_);
if (!sym_.get_ignore_placement())
detector_.insert(transformed_bbox);
}
}
else
{
markers_placement<T, label_collision_detector4> placement(path, bbox_, marker_trans_, detector_,
sym_.get_spacing() * scale_factor_,
sym_.get_max_error(),
sym_.get_allow_overlap());
double x, y, angle;
while (placement.get_point(x, y, angle))
{
agg::trans_affine matrix = marker_trans_;
matrix.rotate(angle);
matrix.translate(x, y);
svg_renderer_.render(ras_, sl_, renb_, matrix, 1, bbox_);
}
}
}
private:
agg::scanline_u8 sl_;
agg::rendering_buffer buf_;
pixfmt_comp_type pixf_;
renderer_base renb_;
SvgRenderer & svg_renderer_;
Rasterizer & ras_;
box2d<double> const& bbox_;
agg::trans_affine const& marker_trans_;
markers_symbolizer const& sym_;
Detector & detector_;
double scale_factor_;
};
template <typename Rasterizer, typename RendererBuffer>
void render_raster_marker(Rasterizer & ras, RendererBuffer & renb,
agg::scanline_u8 & sl, image_data_32 const& src,
agg::trans_affine const& marker_tr, double opacity)
{
double width = src.width();
double height = src.height();
double p[8];
p[0] = 0; p[1] = 0;
p[2] = width; p[3] = 0;
p[4] = width; p[5] = height;
p[6] = 0; p[7] = height;
marker_tr.transform(&p[0], &p[1]);
marker_tr.transform(&p[2], &p[3]);
marker_tr.transform(&p[4], &p[5]);
marker_tr.transform(&p[6], &p[7]);
ras.move_to_d(p[0],p[1]);
ras.line_to_d(p[2],p[3]);
ras.line_to_d(p[4],p[5]);
ras.line_to_d(p[6],p[7]);
typedef agg::rgba8 color_type;
agg::span_allocator<color_type> sa;
agg::image_filter_bilinear filter_kernel;
agg::image_filter_lut filter(filter_kernel, false);
agg::rendering_buffer marker_buf((unsigned char *)src.getBytes(),
src.width(),
src.height(),
src.width()*4);
agg::pixfmt_rgba32_pre pixf(marker_buf);
typedef agg::image_accessor_clone<agg::pixfmt_rgba32_pre> img_accessor_type;
typedef agg::span_interpolator_linear<agg::trans_affine> interpolator_type;
typedef agg::span_image_filter_rgba_2x2<img_accessor_type,
interpolator_type> span_gen_type;
typedef agg::order_rgba order_type;
typedef agg::pixel32_type pixel_type;
typedef agg::comp_op_adaptor_rgba_pre<color_type, order_type> blender_type; // comp blender
typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_comp_type;
typedef agg::renderer_base<pixfmt_comp_type> renderer_base;
typedef agg::renderer_scanline_aa_alpha<renderer_base,
agg::span_allocator<agg::rgba8>,
span_gen_type> renderer_type;
img_accessor_type ia(pixf);
interpolator_type interpolator(agg::trans_affine(p, 0, 0, width, height) );
span_gen_type sg(ia, interpolator, filter);
renderer_type rp(renb,sa, sg, unsigned(opacity*255));
agg::render_scanlines(ras, sl, rp);
}
template <typename BufferType, typename Rasterizer, typename Detector>
struct raster_markers_rasterizer_dispatch
{
typedef agg::rgba8 color_type;
typedef agg::order_rgba order_type;
typedef agg::pixel32_type pixel_type;
typedef agg::comp_op_adaptor_rgba_pre<color_type, order_type> blender_type; // comp blender
typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_comp_type;
typedef agg::renderer_base<pixfmt_comp_type> renderer_base;
raster_markers_rasterizer_dispatch(BufferType & image_buffer,
Rasterizer & ras,
image_data_32 const& src,
agg::trans_affine const& marker_trans,
markers_symbolizer const& sym,
Detector & detector,
double scale_factor)
: buf_(image_buffer.raw_data(), image_buffer.width(), image_buffer.height(), image_buffer.width() * 4),
pixf_(buf_),
renb_(pixf_),
ras_(ras),
src_(src),
marker_trans_(marker_trans),
sym_(sym),
detector_(detector),
scale_factor_(scale_factor)
{
pixf_.comp_op(static_cast<agg::comp_op_e>(sym_.comp_op()));
}
template <typename T>
void add_path(T & path)
{
marker_placement_e placement_method = sym_.get_marker_placement();
box2d<double> bbox_(0,0, src_.width(),src_.height());
if (placement_method != MARKER_LINE_PLACEMENT)
{
double x,y;
path.rewind(0);
if (placement_method == MARKER_INTERIOR_PLACEMENT)
{
label::interior_position(path, x, y);
}
else
{
label::centroid(path, x, y);
}
agg::trans_affine matrix = marker_trans_;
matrix.translate(x,y);
box2d<double> transformed_bbox = bbox_ * matrix;
if (sym_.get_allow_overlap() ||
detector_.has_placement(transformed_bbox))
{
float opacity = sym_.get_opacity() ? *sym_.get_opacity() : 1;
render_raster_marker(ras_, renb_, sl_, src_,
matrix, opacity);
if (!sym_.get_ignore_placement())
detector_.insert(transformed_bbox);
}
}
else
{
markers_placement<T, label_collision_detector4> placement(path, bbox_, marker_trans_, detector_,
sym_.get_spacing() * scale_factor_,
sym_.get_max_error(),
sym_.get_allow_overlap());
double x, y, angle;
while (placement.get_point(x, y, angle))
{
agg::trans_affine matrix = marker_trans_;
matrix.rotate(angle);
matrix.translate(x,y);
float opacity = sym_.get_opacity() ? *sym_.get_opacity() : 1;
render_raster_marker(ras_, renb_, sl_, src_,
matrix, opacity);
}
}
}
private:
agg::scanline_u8 sl_;
agg::rendering_buffer buf_;
pixfmt_comp_type pixf_;
renderer_base renb_;
Rasterizer & ras_;
image_data_32 const& src_;
agg::trans_affine const& marker_trans_;
markers_symbolizer const& sym_;
Detector & detector_;
double scale_factor_;
};
template <typename T>
void agg_renderer<T>::process(markers_symbolizer const& sym,
feature_impl & feature,
proj_transform const& prj_trans)
{
typedef agg::rgba8 color_type;
typedef agg::order_rgba order_type;
typedef agg::pixel32_type pixel_type;
typedef agg::comp_op_adaptor_rgba_pre<color_type, order_type> blender_type; // comp blender
typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_comp_type;
typedef agg::renderer_base<pixfmt_comp_type> renderer_base;
typedef label_collision_detector4 detector_type;
typedef boost::mpl::vector<clip_line_tag,clip_poly_tag,transform_tag,smooth_tag> conv_types;
std::string filename = path_processor_type::evaluate(*sym.get_filename(), feature);
if (!filename.empty())
{
boost::optional<marker_ptr> mark = mapnik::marker_cache::instance()->find(filename, true);
if (mark && *mark)
{
ras_ptr->reset();
ras_ptr->gamma(agg::gamma_power());
agg::trans_affine geom_tr;
evaluate_transform(geom_tr, feature, sym.get_transform());
agg::trans_affine tr;
tr *= agg::trans_affine_scaling(scale_factor_);
if ((*mark)->is_vector())
{
using namespace mapnik::svg;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_type;
typedef agg::pod_bvector<path_attributes> svg_attribute_type;
typedef svg_renderer<svg_path_adapter,
svg_attribute_type,
renderer_type,
agg::pixfmt_rgba32 > svg_renderer_type;
typedef vector_markers_rasterizer_dispatch<buffer_type,
svg_renderer_type,
rasterizer,
detector_type > dispatch_type;
boost::optional<svg_path_ptr> const& stock_vector_marker = (*mark)->get_vector_data();
expression_ptr const& width_expr = sym.get_width();
expression_ptr const& height_expr = sym.get_height();
// special case for simple ellipse markers
// to allow for full control over rx/ry dimensions
if (filename == "shape://ellipse"
&& (width_expr || height_expr))
{
svg_storage_type marker_ellipse;
vertex_stl_adapter<svg_path_storage> stl_storage(marker_ellipse.source());
svg_path_adapter svg_path(stl_storage);
build_ellipse(sym, feature, marker_ellipse, svg_path);
svg_attribute_type attributes;
bool result = push_explicit_style( (*stock_vector_marker)->attributes(), attributes, sym);
svg_renderer_type svg_renderer(svg_path, result ? attributes : (*stock_vector_marker)->attributes());
evaluate_transform(tr, feature, sym.get_image_transform());
box2d<double> bbox = marker_ellipse.bounding_box();
coord2d center = bbox.center();
agg::trans_affine_translation recenter(-center.x, -center.y);
agg::trans_affine marker_trans = recenter * tr;
dispatch_type rasterizer_dispatch(*current_buffer_,svg_renderer,*ras_ptr,
bbox, marker_trans, sym, *detector_, scale_factor_);
vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
CoordTransform, proj_transform, agg::trans_affine, conv_types>
converter(query_extent_, rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
if (sym.clip() && feature.paths().size() > 0) // optional clip (default: true)
{
eGeomType type = feature.paths()[0].type();
if (type == Polygon)
converter.template set<clip_poly_tag>();
else if (type == LineString)
converter.template set<clip_line_tag>();
// don't clip if type==Point
}
converter.template set<transform_tag>(); //always transform
if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
BOOST_FOREACH(geometry_type & geom, feature.paths())
{
converter.apply(geom);
}
}
else
{
box2d<double> const& bbox = (*mark)->bounding_box();
setup_label_transform(tr, bbox, feature, sym);
coord2d center = bbox.center();
agg::trans_affine_translation recenter(-center.x, -center.y);
agg::trans_affine marker_trans = recenter * tr;
vertex_stl_adapter<svg_path_storage> stl_storage((*stock_vector_marker)->source());
svg_path_adapter svg_path(stl_storage);
svg_attribute_type attributes;
bool result = push_explicit_style( (*stock_vector_marker)->attributes(), attributes, sym);
svg_renderer_type svg_renderer(svg_path, result ? attributes : (*stock_vector_marker)->attributes());
dispatch_type rasterizer_dispatch(*current_buffer_,svg_renderer,*ras_ptr,
bbox, marker_trans, sym, *detector_, scale_factor_);
vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
CoordTransform, proj_transform, agg::trans_affine, conv_types>
converter(query_extent_, rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
if (sym.clip() && feature.paths().size() > 0) // optional clip (default: true)
{
eGeomType type = feature.paths()[0].type();
if (type == Polygon)
converter.template set<clip_poly_tag>();
else if (type == LineString)
converter.template set<clip_line_tag>();
// don't clip if type==Point
}
converter.template set<transform_tag>(); //always transform
if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
BOOST_FOREACH(geometry_type & geom, feature.paths())
{
converter.apply(geom);
}
}
}
else // raster markers
{
box2d<double> const& bbox = (*mark)->bounding_box();
setup_label_transform(tr, bbox, feature, sym);
coord2d center = bbox.center();
agg::trans_affine_translation recenter(-center.x, -center.y);
agg::trans_affine marker_trans = recenter * tr;
boost::optional<mapnik::image_ptr> marker = (*mark)->get_bitmap_data();
typedef raster_markers_rasterizer_dispatch<buffer_type,rasterizer, detector_type> dispatch_type;
dispatch_type rasterizer_dispatch(*current_buffer_,*ras_ptr, **marker,
marker_trans, sym, *detector_, scale_factor_);
vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
CoordTransform, proj_transform, agg::trans_affine, conv_types>
converter(query_extent_, rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
if (sym.clip() && feature.paths().size() > 0) // optional clip (default: true)
{
eGeomType type = feature.paths()[0].type();
if (type == Polygon)
converter.template set<clip_poly_tag>();
else if (type == LineString)
converter.template set<clip_line_tag>();
// don't clip if type==Point
}
converter.template set<transform_tag>(); //always transform
if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
BOOST_FOREACH(geometry_type & geom, feature.paths())
{
converter.apply(geom);
}
}
}
}
}
template void agg_renderer<image_32>::process(markers_symbolizer const&,
mapnik::feature_impl &,
proj_transform const&);
}
Reference in a new issue View git blame Copy permalink