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/*****************************************************************************
*
* 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/agg_renderer.hpp>
#include <mapnik/agg_rasterizer.hpp>
#include <mapnik/agg_helpers.hpp>
#include <mapnik/graphics.hpp>
#include <mapnik/debug.hpp>
#include <mapnik/layer.hpp>
#include <mapnik/feature_type_style.hpp>
#include <mapnik/marker.hpp>
#include <mapnik/marker_cache.hpp>
#include <mapnik/unicode.hpp>
#include <mapnik/font_set.hpp>
#include <mapnik/parse_path.hpp>
#include <mapnik/map.hpp>
#include <mapnik/svg/svg_converter.hpp>
#include <mapnik/svg/svg_renderer_agg.hpp>
#include <mapnik/svg/svg_path_adapter.hpp>
#include <mapnik/image_compositing.hpp>
#include <mapnik/image_filter.hpp>
#include <mapnik/image_util.hpp>
// agg
#define AGG_RENDERING_BUFFER row_ptr_cache<int8u>
#include "agg_rendering_buffer.h"
#include "agg_pixfmt_rgba.h"
#include "agg_scanline_u.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/utility.hpp>
#include <boost/make_shared.hpp>
#include <boost/math/special_functions/round.hpp>
// stl
#include <cmath>
namespace mapnik
{
class pattern_source : private boost::noncopyable
{
public:
pattern_source(image_data_32 const& pattern)
: pattern_(pattern) {}
unsigned int width() const
{
return pattern_.width();
}
unsigned int height() const
{
return pattern_.height();
}
agg::rgba8 pixel(int x, int y) const
{
unsigned c = pattern_(x,y);
return agg::rgba8(c & 0xff,
(c >> 8) & 0xff,
(c >> 16) & 0xff,
(c >> 24) & 0xff);
}
private:
image_data_32 const& pattern_;
};
template <typename T>
agg_renderer<T>::agg_renderer(Map const& m, T & pixmap, double scale_factor, unsigned offset_x, unsigned offset_y)
: feature_style_processor<agg_renderer>(m, scale_factor),
pixmap_(pixmap),
internal_buffer_(),
current_buffer_(&pixmap),
style_level_compositing_(false),
width_(pixmap_.width()),
height_(pixmap_.height()),
scale_factor_(scale_factor),
t_(m.width(),m.height(),m.get_current_extent(),offset_x,offset_y),
font_engine_(),
font_manager_(font_engine_),
detector_(boost::make_shared<label_collision_detector4>(box2d<double>(-m.buffer_size(), -m.buffer_size(), m.width() + m.buffer_size() ,m.height() + m.buffer_size()))),
ras_ptr(new rasterizer)
{
setup(m);
}
template <typename T>
agg_renderer<T>::agg_renderer(Map const& m, T & pixmap, boost::shared_ptr<label_collision_detector4> detector,
double scale_factor, unsigned offset_x, unsigned offset_y)
: feature_style_processor<agg_renderer>(m, scale_factor),
pixmap_(pixmap),
internal_buffer_(),
current_buffer_(&pixmap),
style_level_compositing_(false),
width_(pixmap_.width()),
height_(pixmap_.height()),
scale_factor_(scale_factor),
t_(m.width(),m.height(),m.get_current_extent(),offset_x,offset_y),
font_engine_(),
font_manager_(font_engine_),
detector_(detector),
ras_ptr(new rasterizer)
{
setup(m);
}
template <typename T>
void agg_renderer<T>::setup(Map const &m)
{
boost::optional<color> const& bg = m.background();
if (bg) pixmap_.set_background(*bg);
boost::optional<std::string> const& image_filename = m.background_image();
if (image_filename)
{
boost::optional<mapnik::marker_ptr> bg_marker = mapnik::marker_cache::instance().find(*image_filename,true);
if (bg_marker && (*bg_marker)->is_bitmap())
{
mapnik::image_ptr bg_image = *(*bg_marker)->get_bitmap_data();
int w = bg_image->width();
int h = bg_image->height();
if ( w > 0 && h > 0)
{
// repeat background-image both vertically and horizontally
unsigned x_steps = unsigned(std::ceil(width_/double(w)));
unsigned y_steps = unsigned(std::ceil(height_/double(h)));
for (unsigned x=0;x<x_steps;++x)
{
for (unsigned y=0;y<y_steps;++y)
{
composite(pixmap_.data(),*bg_image, src_over, 1.0f, x*w, y*h, true);
}
}
}
}
}
agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
agg::pixfmt_rgba32 pixf(buf);
pixf.premultiply();
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Scale=" << m.scale();
}
template <typename T>
agg_renderer<T>::~agg_renderer() {}
template <typename T>
void agg_renderer<T>::start_map_processing(Map const& map)
{
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Start map processing bbox=" << map.get_current_extent();
ras_ptr->clip_box(0,0,width_,height_);
}
template <typename T>
void agg_renderer<T>::end_map_processing(Map const& )
{
agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
agg::pixfmt_rgba32 pixf(buf);
pixf.demultiply();
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: End map processing";
}
template <typename T>
void agg_renderer<T>::start_layer_processing(layer const& lay, box2d<double> const& query_extent)
{
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Start processing layer=" << lay.name();
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: -- datasource=" << lay.datasource().get();
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: -- query_extent=" << query_extent;
if (lay.clear_label_cache())
{
detector_->clear();
}
query_extent_ = query_extent;
int buffer_size = lay.buffer_size();
if (buffer_size != 0 )
{
double padding = buffer_size * (double)(query_extent.width()/pixmap_.width());
double x0 = query_extent_.minx();
double y0 = query_extent_.miny();
double x1 = query_extent_.maxx();
double y1 = query_extent_.maxy();
query_extent_.init(x0 - padding, y0 - padding, x1 + padding , y1 + padding);
}
boost::optional<box2d<double> > const& maximum_extent = lay.maximum_extent();
if (maximum_extent)
{
query_extent_.clip(*maximum_extent);
}
}
template <typename T>
void agg_renderer<T>::end_layer_processing(layer const&)
{
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: End layer processing";
}
template <typename T>
void agg_renderer<T>::start_style_processing(feature_type_style const& st)
{
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Start processing style";
if (st.comp_op() || st.image_filters().size() > 0 || st.get_opacity() < 1)
{
style_level_compositing_ = true;
}
else
{
style_level_compositing_ = false;
}
if (style_level_compositing_)
{
if (!internal_buffer_)
{
internal_buffer_ = boost::make_shared<buffer_type>(pixmap_.width(),pixmap_.height());
}
else
{
internal_buffer_->set_background(color(0,0,0,0)); // fill with transparent colour
}
current_buffer_ = internal_buffer_.get();
}
else
{
current_buffer_ = &pixmap_;
}
}
template <typename T>
void agg_renderer<T>::end_style_processing(feature_type_style const& st)
{
if (style_level_compositing_)
{
bool blend_from = false;
if (st.image_filters().size() > 0)
{
blend_from = true;
mapnik::filter::filter_visitor<image_32> visitor(*current_buffer_);
BOOST_FOREACH(mapnik::filter::filter_type const& filter_tag, st.image_filters())
{
boost::apply_visitor(visitor, filter_tag);
}
}
if (st.comp_op())
{
composite(pixmap_.data(),current_buffer_->data(), *st.comp_op(), st.get_opacity(), 0, 0, false);
}
else if (blend_from || st.get_opacity() < 1)
{
composite(pixmap_.data(),current_buffer_->data(), src_over, st.get_opacity(), 0, 0, false);
}
// apply any 'direct' image filters
mapnik::filter::filter_visitor<image_32> visitor(pixmap_);
BOOST_FOREACH(mapnik::filter::filter_type const& filter_tag, st.direct_image_filters())
{
boost::apply_visitor(visitor, filter_tag);
}
}
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: End processing style";
}
template <typename T>
void agg_renderer<T>::render_marker(pixel_position const& pos, marker const& marker, agg::trans_affine const& tr,
double opacity, composite_mode_e comp_op)
{
typedef agg::rgba8 color_type;
typedef agg::order_rgba order_type;
typedef agg::pixel32_type pixel_type;
typedef agg::comp_op_adaptor_rgba<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_solid<renderer_base> renderer_type;
typedef agg::pod_bvector<mapnik::svg::path_attributes> svg_attribute_type;
ras_ptr->reset();
ras_ptr->gamma(agg::gamma_power());
agg::scanline_u8 sl;
agg::rendering_buffer buf(current_buffer_->raw_data(), width_, height_, width_ * 4);
pixfmt_comp_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(comp_op));
renderer_base renb(pixf);
if (marker.is_vector())
{
box2d<double> const& bbox = (*marker.get_vector_data())->bounding_box();
coord<double,2> c = bbox.center();
// center the svg marker on '0,0'
agg::trans_affine mtx = agg::trans_affine_translation(-c.x,-c.y);
// apply symbol transformation to get to map space
mtx *= tr;
mtx *= agg::trans_affine_scaling(scale_factor_);
// render the marker at the center of the marker box
mtx.translate(pos.x, pos.y);
using namespace mapnik::svg;
vertex_stl_adapter<svg_path_storage> stl_storage((*marker.get_vector_data())->source());
svg_path_adapter svg_path(stl_storage);
svg_renderer_agg<svg_path_adapter,
svg_attribute_type,
renderer_type,
pixfmt_comp_type> svg_renderer(svg_path,
(*marker.get_vector_data())->attributes());
svg_renderer.render(*ras_ptr, sl, renb, mtx, opacity, bbox);
}
else
{
double width = (*marker.get_bitmap_data())->width();
double height = (*marker.get_bitmap_data())->height();
double cx = 0.5 * width;
double cy = 0.5 * height;
if (std::fabs(1.0 - scale_factor_) < 0.001 && tr.is_identity())
{
composite(current_buffer_->data(), **marker.get_bitmap_data(),
comp_op, opacity,
boost::math::iround(pos.x - cx),
boost::math::iround(pos.y - cy),
false);
}
else
{
double p[8];
double x0 = pos.x - 0.5 * width;
double y0 = pos.y - 0.5 * height;
p[0] = x0; p[1] = y0;
p[2] = x0 + width; p[3] = y0;
p[4] = x0 + width; p[5] = y0 + height;
p[6] = x0; p[7] = y0 + height;
agg::trans_affine marker_tr;
marker_tr *= agg::trans_affine_translation(-pos.x,-pos.y);
marker_tr *= tr;
marker_tr *= agg::trans_affine_scaling(scale_factor_);
marker_tr *= agg::trans_affine_translation(pos.x,pos.y);
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_ptr->move_to_d(p[0],p[1]);
ras_ptr->line_to_d(p[2],p[3]);
ras_ptr->line_to_d(p[4],p[5]);
ras_ptr->line_to_d(p[6],p[7]);
agg::span_allocator<color_type> sa;
agg::image_filter_bilinear filter_kernel;
agg::image_filter_lut filter(filter_kernel, false);
image_data_32 const& src = **marker.get_bitmap_data();
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::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_ptr, sl, rp);
}
}
}
template <typename T>
void agg_renderer<T>::painted(bool painted)
{
pixmap_.painted(painted);
}
template <typename T>
void agg_renderer<T>::debug_draw_box(box2d<double> const& box,
double x, double y, double angle)
{
agg::rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_ * 4);
debug_draw_box(buf, box, x, y, angle);
}
template <typename T> template <typename R>
void agg_renderer<T>::debug_draw_box(R& buf, box2d<double> const& box,
double x, double y, double angle)
{
typedef agg::pixfmt_rgba32 pixfmt;
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_type;
agg::scanline_p8 sl_line;
pixfmt pixf(buf);
renderer_base renb(pixf);
renderer_type ren(renb);
// compute tranformation matrix
agg::trans_affine tr = agg::trans_affine_rotation(angle).translate(x, y);
// prepare path
agg::path_storage pbox;
pbox.start_new_path();
pbox.move_to(box.minx(), box.miny());
pbox.line_to(box.maxx(), box.miny());
pbox.line_to(box.maxx(), box.maxy());
pbox.line_to(box.minx(), box.maxy());
pbox.line_to(box.minx(), box.miny());
// prepare stroke with applied transformation
typedef agg::conv_transform<agg::path_storage> conv_transform;
typedef agg::conv_stroke<conv_transform> conv_stroke;
conv_transform tbox(pbox, tr);
conv_stroke sbox(tbox);
sbox.generator().width(1.0 * scale_factor_);
// render the outline
ras_ptr->reset();
ras_ptr->add_path(sbox);
ren.color(agg::rgba8(0x33, 0x33, 0xff, 0xcc)); // blue is fine
agg::render_scanlines(*ras_ptr, sl_line, ren);
}
template <typename T>
void agg_renderer<T>::draw_geo_extent(box2d<double> const& extent, mapnik::color const& color)
{
box2d<double> box = t_.forward(extent);
double x0 = box.minx();
double x1 = box.maxx();
double y0 = box.miny();
double y1 = box.maxy();
unsigned rgba = color.rgba();
for (double x=x0; x<x1; x++)
{
pixmap_.setPixel(x, y0, rgba);
pixmap_.setPixel(x, y1, rgba);
}
for (double y=y0; y<y1; y++)
{
pixmap_.setPixel(x0, y, rgba);
pixmap_.setPixel(x1, y, rgba);
}
}
template class agg_renderer<image_32>;
template void agg_renderer<image_32>::debug_draw_box<agg::rendering_buffer>(
agg::rendering_buffer& buf,
box2d<double> const& box,
double x, double y, double angle);
}
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