virtual void on_draw() {
typedef agg::renderer_base<pixfmt_type> base_ren_type;
pixfmt_type pf(rbuf_window());
base_ren_type ren_base(pf);
ren_base.clear(agg::rgba(1, 1, 1));
render();
agg::render_ctrl(m_ras, m_sl, ren_base, m_polygons);
agg::render_ctrl(m_ras, m_sl, ren_base, m_operation);
}
void agg_renderer<T>::process(line_pattern_symbolizer const& sym,
mapnik::feature_ptr const& feature,
proj_transform const& prj_trans)
{
typedef agg::conv_clip_polyline<geometry_type> clipped_geometry_type;
typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
typedef agg::renderer_base<agg::pixfmt_rgba32_plain> renderer_base;
typedef agg::renderer_outline_image<renderer_base, pattern_type> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
agg::pixfmt_rgba32_plain pixf(buf);
std::string filename = path_processor_type::evaluate( *sym.get_filename(), *feature);
boost::optional<marker_ptr> mark = marker_cache::instance()->find(filename,true);
if (!mark) return;
if (!(*mark)->is_bitmap())
{
std::clog << "### Warning only images (not '" << filename << "') are supported in the line_pattern_symbolizer\n";
return;
}
boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
if (!pat) return;
box2d<double> ext = query_extent_ * 1.1;
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(*(*pat));
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
// TODO - should be sensitive to buffer size
ren.clip_box(0,0,width_,height_);
rasterizer_type ras(ren);
//metawriter_with_properties writer = sym.get_metawriter();
for (unsigned i=0;i<feature->num_geometries();++i)
{
geometry_type & geom = feature->get_geometry(i);
if (geom.num_points() > 1)
{
clipped_geometry_type clipped(geom);
clipped.clip_box(ext.minx(),ext.miny(),ext.maxx(),ext.maxy());
path_type path(t_,clipped,prj_trans);
ras.add_path(path);
//if (writer.first) writer.first->add_line(path, *feature, t_, writer.second);
}
}
}
virtual void on_draw()
{
typedef agg::renderer_base<agg::pixfmt_bgr24> base_ren_type;
agg::pixfmt_bgr24 pf(rbuf_window());
base_ren_type ren_base(pf);
ren_base.clear(agg::rgba(1,1,1));
agg::scanline_u8 sl;
agg::rasterizer_scanline_aa<> ras;
render_clipper(sl, ras);
agg::render_ctrl(ras, sl, ren_base, m_polygons);
agg::render_ctrl(ras, sl, ren_base, m_operation);
}
virtual void on_draw()
{
typedef agg::renderer_base<pixfmt> base_ren_type;
pixfmt pf(rbuf_window());
base_ren_type ren_base(pf);
ren_base.clear(agg::rgba(1,1,1));
agg::scanline_u8 sl;
agg::rasterizer_scanline_aa<> ras;
render_gouraud(sl, ras);
ras.gamma(agg::gamma_none());
agg::render_ctrl(ras, sl, ren_base, m_dilation);
agg::render_ctrl(ras, sl, ren_base, m_gamma);
agg::render_ctrl(ras, sl, ren_base, m_alpha);
}
void agg_renderer<T>::process(line_pattern_symbolizer const& sym,
Feature const& feature,
proj_transform const& prj_trans)
{
typedef coord_transform2<CoordTransform,geometry_type> path_type;
typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
typedef agg::renderer_base<agg::pixfmt_rgba32_plain> renderer_base;
typedef agg::renderer_outline_image<renderer_base, pattern_type> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
agg::pixfmt_rgba32_plain pixf(buf);
std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);
boost::optional<marker_ptr> mark = marker_cache::instance()->find(filename,true);
if (!mark || !(*mark)->is_bitmap()) return;
boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
if (!pat) return;
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(*(*pat));
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
ren.clip_box(0,0,width_,height_);
rasterizer_type ras(ren);
metawriter_with_properties writer = sym.get_metawriter();
for (unsigned i=0;i<feature.num_geometries();++i)
{
geometry_type const& geom = feature.get_geometry(i);
if (geom.num_points() > 1)
{
path_type path(t_,geom,prj_trans);
ras.add_path(path);
if (writer.first) writer.first->add_line(path, feature, t_, writer.second);
}
}
}
virtual void on_draw()
{
typedef agg::renderer_base<pixfmt> base_ren_type;
typedef agg::renderer_scanline_aa_solid<base_ren_type> renderer_solid;
pixfmt pf(rbuf_window());
base_ren_type ren_base(pf);
renderer_solid ren_solid(ren_base);
ren_base.clear(agg::rgba(1,1,1));
agg::scanline_u8 sl;
agg::rasterizer_scanline_aa<> ras;
agg::rasterizer_scanline_aa<> ras2;
agg::render_ctrl(ras, sl, ren_base, m_polygons);
agg::render_ctrl(ras, sl, ren_base, m_fill_rule);
agg::render_ctrl(ras, sl, ren_base, m_scanline_type);
agg::render_ctrl(ras, sl, ren_base, m_operation);
render_sbool(ras, ras2);
}
virtual void on_draw()
{
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_scanline;
typedef agg::scanline_u8 scanline;
pixfmt pixf(rbuf_window());
renderer_base ren_base(pixf);
ren_base.clear(agg::rgba(1.0, 1.0, 0.95));
renderer_scanline ren(ren_base);
unsigned i;
unsigned w = unsigned(width());
m_gradient.resize(w);
agg::rgba8 c1(255, 0, 0, 180);
agg::rgba8 c2(0, 0, 255, 180);
for(i = 0; i < w; i++)
{
m_gradient[i] = c1.gradient(c2, i / width());
m_gradient[i].premultiply();
}
agg::rasterizer_scanline_aa<agg::rasterizer_sl_clip_dbl> ras;
agg::rasterizer_compound_aa<agg::rasterizer_sl_clip_dbl> rasc;
agg::scanline_u8 sl;
agg::scanline_bin sl_bin;
agg::conv_transform<agg::compound_shape> shape(m_shape, m_scale);
agg::conv_stroke<agg::conv_transform<agg::compound_shape> > stroke(shape);
agg::test_styles style_handler(m_colors, m_gradient.data());
agg::span_allocator<agg::rgba8> alloc;
m_shape.approximation_scale(m_scale.scale());
// Fill shape
//----------------------
rasc.clip_box(0, 0, width(), height());
rasc.reset();
//rasc.filling_rule(agg::fill_even_odd);
start_timer();
for(i = 0; i < m_shape.paths(); i++)
{
if(m_shape.style(i).left_fill >= 0 ||
m_shape.style(i).right_fill >= 0)
{
rasc.styles(m_shape.style(i).left_fill,
m_shape.style(i).right_fill);
rasc.add_path(shape, m_shape.style(i).path_id);
}
}
agg::render_scanlines_compound(rasc, sl, sl_bin, ren_base, alloc, style_handler);
double tfill = elapsed_time();
// Hit-test test
bool draw_strokes = true;
if(m_hit_x >= 0 && m_hit_y >= 0)
{
if(rasc.hit_test(m_hit_x, m_hit_y))
{
draw_strokes = false;
}
}
// Draw strokes
//----------------------
start_timer();
if(draw_strokes)
{
ras.clip_box(0, 0, width(), height());
stroke.width(sqrt(m_scale.scale()));
stroke.line_join(agg::round_join);
stroke.line_cap(agg::round_cap);
for(i = 0; i < m_shape.paths(); i++)
{
ras.reset();
if(m_shape.style(i).line >= 0)
{
ras.add_path(stroke, m_shape.style(i).path_id);
ren.color(agg::rgba8(0,0,0, 128));
agg::render_scanlines(ras, sl, ren);
}
}
}
double tstroke = elapsed_time();
char buf[256];
agg::gsv_text t;
t.size(8.0);
t.flip(true);
agg::conv_stroke<agg::gsv_text> ts(t);
ts.width(1.6);
ts.line_cap(agg::round_cap);
sprintf(buf, "Fill=%.2fms (%dFPS) Stroke=%.2fms (%dFPS) Total=%.2fms (%dFPS)\n\n"
"Space: Next Shape\n\n"
"+/- : ZoomIn/ZoomOut (with respect to the mouse pointer)",
tfill, int(1000.0 / tfill),
tstroke, int(1000.0 / tstroke),
tfill+tstroke, int(1000.0 / (tfill+tstroke)));
t.start_point(10.0, 20.0);
t.text(buf);
ras.add_path(ts);
ren.color(agg::rgba(0,0,0));
agg::render_scanlines(ras, sl, ren);
if(m_gamma.gamma() != 1.0)
{
pixf.apply_gamma_inv(m_gamma);
}
}
virtual void on_draw()
{
pixfmt pf(rbuf_window());
renderer_base ren_base(pf);
ren_base.clear(agg::rgba(0.5, 0.75, 0.85));
renderer_scanline ren(ren_base);
rasterizer_scanline ras;
scanline sl;
ras.clip_box(0, 0, width(), height());
// Pattern source. Must have an interface:
// width() const
// height() const
// pixel(int x, int y) const
// Any agg::renderer_base<> or derived
// is good for the use as a source.
//-----------------------------------
pattern_src_brightness_to_alpha_rgba8 p1(rbuf_img(0));
agg::pattern_filter_bilinear_rgba8 fltr; // Filtering functor
// agg::line_image_pattern is the main container for the patterns. It creates
// a copy of the patterns extended according to the needs of the filter.
// agg::line_image_pattern can operate with arbitrary image width, but if the
// width of the pattern is power of 2, it's better to use the modified
// version agg::line_image_pattern_pow2 because it works about 15-25 percent
// faster than agg::line_image_pattern (because of using simple masking instead
// of expensive '%' operation).
typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
typedef agg::renderer_base<pixfmt> base_ren_type;
typedef agg::renderer_outline_image<base_ren_type, pattern_type> renderer_img_type;
typedef agg::rasterizer_outline_aa<renderer_img_type, agg::line_coord_sat> rasterizer_img_type;
typedef agg::renderer_outline_aa<base_ren_type> renderer_line_type;
typedef agg::rasterizer_outline_aa<renderer_line_type, agg::line_coord_sat> rasterizer_line_type;
//-- Create with specifying the source
//pattern_type patt(fltr, src);
//-- Create uninitialized and set the source
pattern_type patt(fltr);
patt.create(p1);
renderer_img_type ren_img(ren_base, patt);
rasterizer_img_type ras_img(ren_img);
//-- create uninitialized and set parameters
agg::line_profile_aa profile;
profile.smoother_width(10.0); //optional
profile.width(8.0); //mandatory!
renderer_line_type ren_line(ren_base, profile);
ren_line.color(agg::rgba8(0,0,127)); //mandatory!
rasterizer_line_type ras_line(ren_line);
ras_line.round_cap(true); //optional
//ras_line.line_join(agg::outline_no_join); //optional
// Calculate the dilation value so that, the line caps were
// drawn correctly.
//---------------
double w2 = 9.0;//p1.height() / 2 + 2;
// Set the clip box a bit bigger than you expect. You need it
// to draw the clipped line caps correctly. The correct result
// is achieved with raster clipping.
//------------------------
ren_img.scale_x(m_scale_x.value());
ren_img.start_x(m_start_x.value());
ren_img.clip_box (50-w2, 50-w2, width()-50+w2, height()-50+w2);
ren_line.clip_box(50-w2, 50-w2, width()-50+w2, height()-50+w2);
// First, draw polyline without raster clipping just to show the idea
//------------------------
draw_polyline(ras_line, ren_line, m_line1.polygon(), m_line1.num_points());
draw_polyline(ras_img, ren_img, m_line1.polygon(), m_line1.num_points());
// Clear the area, almost opaque, but not completely
//------------------------
ren_base.blend_bar(0, 0, (int)width(), (int)height(), agg::rgba(1,1,1), 200);
// Set the raster clip box and then, draw again.
// In reality there shouldn't be two calls above.
// It's done only for demonstration
//------------------------
ren_base.clip_box((int)50, (int)50, (int)width()-50, (int)height()-50);
// This "copy_bar" is also for demonstration only
//------------------------
ren_base.copy_bar(0, 0, (int)width(), (int)height(), agg::rgba(1,1,1));
// Finally draw polyline correctly clipped: We use double clipping,
// first is vector clipping, with extended clip box, second is raster
// clipping with normal clip box.
//------------------------
ren_img.scale_x(m_scale_x.value());
ren_img.start_x(m_start_x.value());
draw_polyline(ras_line, ren_line, m_line1.polygon(), m_line1.num_points());
draw_polyline(ras_img, ren_img, m_line1.polygon(), m_line1.num_points());
// Reset clipping and draw the controls and stuff
ren_base.reset_clipping(true);
m_line1.line_width(1/m_scale.scale());
m_line1.point_radius(5/m_scale.scale());
agg::render_ctrl(ras, sl, ren_base, m_line1);
agg::render_ctrl(ras, sl, ren_base, m_scale_x);
agg::render_ctrl(ras, sl, ren_base, m_start_x);
char buf[256];
agg::gsv_text t;
t.size(10.0);
agg::conv_stroke<agg::gsv_text> pt(t);
pt.width(1.5);
pt.line_cap(agg::round_cap);
const double* p = m_line1.polygon();
sprintf(buf, "Len=%.2f", agg::calc_distance(p[0], p[1], p[2], p[3]) * m_scale.scale());
t.start_point(10.0, 30.0);
t.text(buf);
ras.add_path(pt);
ren.color(agg::rgba(0,0,0));
agg::render_scanlines(ras, sl, ren);
}
void render_gouraud(Scanline& sl, Ras& ras)
{
unsigned alpha = int(m_alpha.value() * 255.0);
unsigned brc = 255;
typedef agg::renderer_base<pixfmt> base_ren_type;
#ifdef AGG_GRAY8
typedef agg::span_gouraud_gray8<> gouraud_span_gen_type;
#else
typedef agg::span_gouraud_rgba8<> gouraud_span_gen_type;
#endif
typedef agg::span_allocator<gouraud_span_gen_type::color_type> gouraud_span_alloc_type;
typedef agg::renderer_scanline_u<base_ren_type, gouraud_span_gen_type> renderer_gouraud;
pixfmt pf(rbuf_window());
base_ren_type ren_base(pf);
gouraud_span_alloc_type span_alloc;
gouraud_span_gen_type span_gen(span_alloc);
renderer_gouraud ren_gouraud(ren_base, span_gen);
ras.gamma(agg::gamma_linear(0.0, m_gamma.value()));
double d = m_dilation.value();
// Single triangle
//span_gen.colors(agg::rgba8(255, 0, 0, alpha),
// agg::rgba8(0, 255, 0, alpha),
// agg::rgba8(0, 0, 255, alpha));
//span_gen.triangle(m_x[0], m_y[0], m_x[1], m_y[1], m_x[2], m_y[2], d);
//ras.add_path(span_gen);
//ras.render(sl, ren_gouraud);
// Six triangles
double xc = (m_x[0] + m_x[1] + m_x[2]) / 3.0;
double yc = (m_y[0] + m_y[1] + m_y[2]) / 3.0;
double x1 = (m_x[1] + m_x[0]) / 2 - (xc - (m_x[1] + m_x[0]) / 2);
double y1 = (m_y[1] + m_y[0]) / 2 - (yc - (m_y[1] + m_y[0]) / 2);
double x2 = (m_x[2] + m_x[1]) / 2 - (xc - (m_x[2] + m_x[1]) / 2);
double y2 = (m_y[2] + m_y[1]) / 2 - (yc - (m_y[2] + m_y[1]) / 2);
double x3 = (m_x[0] + m_x[2]) / 2 - (xc - (m_x[0] + m_x[2]) / 2);
double y3 = (m_y[0] + m_y[2]) / 2 - (yc - (m_y[0] + m_y[2]) / 2);
span_gen.colors(agg::rgba8(255, 0, 0, alpha),
agg::rgba8(0, 255, 0, alpha),
agg::rgba8(brc, brc, brc, alpha));
span_gen.triangle(m_x[0], m_y[0], m_x[1], m_y[1], xc, yc, d);
ras.add_path(span_gen);
ras.render(sl, ren_gouraud);
span_gen.colors(agg::rgba8(0, 255, 0, alpha),
agg::rgba8(0, 0, 255, alpha),
agg::rgba8(brc, brc, brc, alpha));
span_gen.triangle(m_x[1], m_y[1], m_x[2], m_y[2], xc, yc, d);
ras.add_path(span_gen);
ras.render(sl, ren_gouraud);
span_gen.colors(agg::rgba8(0, 0, 255, alpha),
agg::rgba8(255, 0, 0, alpha),
agg::rgba8(brc, brc, brc, alpha));
span_gen.triangle(m_x[2], m_y[2], m_x[0], m_y[0], xc, yc, d);
ras.add_path(span_gen);
ras.render(sl, ren_gouraud);
brc = 255-brc;
span_gen.colors(agg::rgba8(255, 0, 0, alpha),
agg::rgba8(0, 255, 0, alpha),
agg::rgba8(brc, brc, brc, alpha));
span_gen.triangle(m_x[0], m_y[0], m_x[1], m_y[1], x1, y1, d);
ras.add_path(span_gen);
ras.render(sl, ren_gouraud);
span_gen.colors(agg::rgba8(0, 255, 0, alpha),
agg::rgba8(0, 0, 255, alpha),
agg::rgba8(brc, brc, brc, alpha));
span_gen.triangle(m_x[1], m_y[1], m_x[2], m_y[2], x2, y2, d);
ras.add_path(span_gen);
ras.render(sl, ren_gouraud);
span_gen.colors(agg::rgba8(0, 0, 255, alpha),
agg::rgba8(255, 0, 0, alpha),
agg::rgba8(brc, brc, brc, alpha));
span_gen.triangle(m_x[2], m_y[2], m_x[0], m_y[0], x3, y3, d);
ras.add_path(span_gen);
ras.render(sl, ren_gouraud);
}
virtual void on_draw() {
typedef agg::renderer_base<pixfmt> base_ren_type;
pixfmt pf(rbuf_window());
base_ren_type ren_base(pf);
ren_base.clear(agg::rgba(1, 1, 1));
agg::scanline_u8 sl;
agg::rasterizer_scanline_aa<> ras;
// Draw some background
agg::ellipse ell;
srand(1234);
unsigned i;
unsigned w = unsigned(width());
unsigned h = unsigned(height());
for (i = 0; i < 100; i++) {
ell.init(rand() % w, rand() % h, rand() % 60 + 5, rand() % 60 + 5, 50);
ras.add_path(ell);
agg::render_scanlines_aa_solid(
ras, sl, ren_base,
agg::rgba(rand() / double(RAND_MAX), rand() / double(RAND_MAX),
rand() / double(RAND_MAX),
rand() / double(RAND_MAX) / 2.0));
}
double parallelogram[6];
parallelogram[0] = m_x[0];
parallelogram[1] = m_y[0];
parallelogram[2] = m_x[1];
parallelogram[3] = m_y[1];
parallelogram[4] = m_x[2];
parallelogram[5] = m_y[2];
// Gradient shape function (linear, radial, custom, etc)
//-----------------
typedef agg::gradient_circle gradient_func_type;
// Alpha gradient shape function (linear, radial, custom, etc)
//-----------------
typedef agg::gradient_xy gradient_alpha_func_type;
// Span interpolator. This object is used in all span generators
// that operate with transformations during iterating of the spans,
// for example, image transformers use the interpolator too.
//-----------------
typedef agg::span_interpolator_linear<> interpolator_type;
// Span allocator is an object that allocates memory for
// the array of colors that will be used to render the
// color spans. One object can be shared between different
// span generators.
//-----------------
typedef agg::span_allocator<color_type> span_allocator_type;
// Gradient colors array adaptor
//-----------------
typedef agg::pod_auto_array<color_type, 256> gradient_colors_type;
// Finally, the gradient span generator working with the color_type
// color type.
//-----------------
typedef agg::span_gradient<color_type, interpolator_type,
gradient_func_type,
gradient_colors_type> span_gradient_type;
// Gradient alpha array adaptor
//-----------------
typedef agg::pod_auto_array<color_type::value_type, 256>
gradient_alpha_type;
// The alpha gradient span converter working with the color_type
// color type.
//-----------------
typedef agg::span_gradient_alpha<
color_type, interpolator_type, gradient_alpha_func_type,
gradient_alpha_type> span_gradient_alpha_type;
// Span converter type
//-----------------
typedef agg::span_converter<span_gradient_type, span_gradient_alpha_type>
span_conv_type;
// The gradient objects declarations
//----------------
gradient_func_type gradient_func; // The gradient function
gradient_alpha_func_type alpha_func; // The gradient function
agg::trans_affine gradient_mtx; // Gradient affine transformer
agg::trans_affine alpha_mtx; // Alpha affine transformer
interpolator_type span_interpolator(
gradient_mtx); // Span gradient interpolator
interpolator_type span_interpolator_alpha(
alpha_mtx); // Span alpha interpolator
span_allocator_type span_allocator; // Span Allocator
gradient_colors_type color_array; // The gradient colors
// Declare the gradient span itself.
// The last two arguments are so called "d1" and "d2"
// defining two distances in pixels, where the gradient starts
// and where it ends. The actual meaning of "d1" and "d2" depands
// on the gradient function.
//----------------
span_gradient_type span_gradient(span_interpolator, gradient_func,
color_array, 0, 150);
// Declare the gradient span itself.
// The last two arguments are so called "d1" and "d2"
// defining two distances in pixels, where the gradient starts
// and where it ends. The actual meaning of "d1" and "d2" depands
// on the gradient function.
//----------------
gradient_alpha_type alpha_array;
span_gradient_alpha_type span_gradient_alpha(
span_interpolator_alpha, alpha_func, alpha_array, 0, 100);
// Span converter declaration
span_conv_type span_conv(span_gradient, span_gradient_alpha);
// Finally we can draw a circle.
//----------------
gradient_mtx *= agg::trans_affine_scaling(0.75, 1.2);
gradient_mtx *= agg::trans_affine_rotation(-agg::pi / 3.0);
gradient_mtx *= agg::trans_affine_translation(width() / 2, height() / 2);
gradient_mtx.invert();
alpha_mtx.parl_to_rect(parallelogram, -100, -100, 100, 100);
fill_color_array(color_array, agg::rgba(0, 0.19, 0.19),
agg::rgba(0.7, 0.7, 0.19), agg::rgba(0.31, 0, 0));
// Fill Alpha array
//----------------
for (i = 0; i < 256; i++) {
alpha_array[i] = color_type::from_double(m_alpha.value(i / 255.0));
}
ell.init(width() / 2, height() / 2, 150, 150, 100);
ras.add_path(ell);
// Render the circle with gradient plus alpha-gradient
agg::render_scanlines_aa(ras, sl, ren_base, span_allocator, span_conv);
// Draw the control points and the parallelogram
//-----------------
agg::rgba color_pnt(0, 0.4, 0.4, 0.31);
ell.init(m_x[0], m_y[0], 5, 5, 20);
ras.add_path(ell);
agg::render_scanlines_aa_solid(ras, sl, ren_base, color_pnt);
ell.init(m_x[1], m_y[1], 5, 5, 20);
ras.add_path(ell);
agg::render_scanlines_aa_solid(ras, sl, ren_base, color_pnt);
ell.init(m_x[2], m_y[2], 5, 5, 20);
ras.add_path(ell);
agg::render_scanlines_aa_solid(ras, sl, ren_base, color_pnt);
agg::vcgen_stroke stroke;
stroke.add_vertex(m_x[0], m_y[0], agg::path_cmd_move_to);
stroke.add_vertex(m_x[1], m_y[1], agg::path_cmd_line_to);
stroke.add_vertex(m_x[2], m_y[2], agg::path_cmd_line_to);
stroke.add_vertex(m_x[0] + m_x[2] - m_x[1], m_y[0] + m_y[2] - m_y[1],
agg::path_cmd_line_to);
stroke.add_vertex(0, 0, agg::path_cmd_end_poly | agg::path_flags_close);
ras.add_path(stroke);
agg::render_scanlines_aa_solid(ras, sl, ren_base, agg::rgba(0, 0, 0));
agg::render_ctrl(ras, sl, ren_base, m_alpha);
}
virtual void on_draw()
{
typedef agg::renderer_base<pixfmt_pre> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_scanline;
typedef agg::scanline_u8 scanline;
pixfmt_pre pixf(rbuf_window());
renderer_base ren_base(pixf);
ren_base.clear(agg::rgba(1.0, 1.0, 0.95));
renderer_scanline ren(ren_base);
agg::rasterizer_scanline_aa<agg::rasterizer_sl_clip_dbl> ras;
agg::scanline_u8 sl;
agg::conv_transform<agg::compound_shape> shape(m_shape, m_scale);
agg::conv_stroke<agg::conv_transform<agg::compound_shape> > stroke(shape);
m_shape.approximation_scale(m_scale.scale());
unsigned i;
agg::path_storage tmp_path;
ras.clip_box(0, 0, width(), height());
// This is an alternative method of Flash rasterization.
// We decompose the compound shape into separate paths
// and select the ones that fit the given style (left or right).
// So that, we form a sub-shape and draw it as a whole.
//
// Here the regular scanline rasterizer is used, but it doesn't
// automatically close the polygons. So that, the rasterizer
// actually works with a set of polylines instead of polygons.
// Of course, the data integrity must be preserved, that is,
// the polylines must eventually form a closed contour
// (or a set of closed contours). So that, first we set
// auto_close(false);
//
// The second important thing is that one path can be rasterized
// twice, if it has both, left and right fill. Sometimes the
// path has equal left and right fill, so that, the same path
// will be added twice even for a single sub-shape. If the
// rasterizer can tolerate these degenerates you can add them,
// but it's also fine just to omit them.
//
// The third thing is that for one side (left or right)
// you should invert the direction of the paths.
//
// The main disadvantage of this method is imperfect stitching
// of the adjacent polygons. The problem can be solved if we use
// compositing operation "plus" instead of alpha-blend. But
// in this case we are forced to use an RGBA buffer, clean it with
// zero, rasterize using "plus" operation, and then alpha-blend
// the result over the final scene. It can be too expensive.
//------------------------------------------------------------
ras.auto_close(false);
//ras.filling_rule(agg::fill_even_odd);
start_timer();
for(int s = m_shape.min_style(); s <= m_shape.max_style(); s++)
{
ras.reset();
for(i = 0; i < m_shape.paths(); i++)
{
const agg::path_style& style = m_shape.style(i);
if(style.left_fill != style.right_fill)
{
if(style.left_fill == s)
{
ras.add_path(shape, style.path_id);
}
if(style.right_fill == s)
{
tmp_path.remove_all();
tmp_path.concat_path(shape, style.path_id);
tmp_path.invert_polygon(0);
ras.add_path(tmp_path);
}
}
}
agg::render_scanlines_aa_solid(ras, sl, ren_base, m_colors[s]);
}
double tfill = elapsed_time();
ras.auto_close(true);
// Draw strokes
//----------------------
start_timer();
stroke.width(sqrt(m_scale.scale()));
stroke.line_join(agg::round_join);
stroke.line_cap(agg::round_cap);
for(i = 0; i < m_shape.paths(); i++)
{
ras.reset();
if(m_shape.style(i).line >= 0)
{
ras.add_path(stroke, m_shape.style(i).path_id);
ren.color(agg::srgba8(0,0,0, 128));
agg::render_scanlines(ras, sl, ren);
}
}
double tstroke = elapsed_time();
char buf[256];
agg::gsv_text t;
t.size(8.0);
t.flip(true);
agg::conv_stroke<agg::gsv_text> ts(t);
ts.width(1.6);
ts.line_cap(agg::round_cap);
sprintf(buf, "Fill=%.2fms (%dFPS) Stroke=%.2fms (%dFPS) Total=%.2fms (%dFPS)\n\n"
"Space: Next Shape\n\n"
"+/- : ZoomIn/ZoomOut (with respect to the mouse pointer)",
tfill, int(1000.0 / tfill),
tstroke, int(1000.0 / tstroke),
tfill+tstroke, int(1000.0 / (tfill+tstroke)));
t.start_point(10.0, 20.0);
t.text(buf);
ras.add_path(ts);
ren.color(agg::rgba(0,0,0));
agg::render_scanlines(ras, sl, ren);
}
virtual void on_draw()
{
pixfmt pf(rbuf_window());
renderer_base ren_base(pf);
ren_base.clear(agg::rgba(1.0, 1.0, 0.95));
renderer_scanline ren(ren_base);
rasterizer_scanline ras;
scanline sl;
// Pattern source. Must have an interface:
// width() const
// height() const
// pixel(int x, int y) const
// Any agg::renderer_base<> or derived
// is good for the use as a source.
//-----------------------------------
pattern_src_brightness_to_alpha p1(rbuf_img(0));
pattern_src_brightness_to_alpha p2(rbuf_img(1));
pattern_src_brightness_to_alpha p3(rbuf_img(2));
pattern_src_brightness_to_alpha p4(rbuf_img(3));
pattern_src_brightness_to_alpha p5(rbuf_img(4));
pattern_src_brightness_to_alpha p6(rbuf_img(5));
pattern_src_brightness_to_alpha p7(rbuf_img(6));
pattern_src_brightness_to_alpha p8(rbuf_img(7));
pattern_src_brightness_to_alpha p9(rbuf_img(8));
agg::pattern_filter_bilinear_rgba<color_type> fltr; // Filtering functor
// agg::line_image_pattern is the main container for the patterns. It creates
// a copy of the patterns extended according to the needs of the filter.
// agg::line_image_pattern can operate with arbitrary image width, but if the
// width of the pattern is power of 2, it's better to use the modified
// version agg::line_image_pattern_pow2 because it works about 15-25 percent
// faster than agg::line_image_pattern (because of using simple masking instead
// of expensive '%' operation).
typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba<color_type> > pattern_type;
typedef agg::renderer_base<pixfmt> base_ren_type;
typedef agg::renderer_outline_image<base_ren_type, pattern_type> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
//-- Create with specifying the source
//pattern_type patt(fltr, src);
//-- Create uninitialized and set the source
pattern_type patt(fltr);
renderer_type ren_img(ren_base, patt);
rasterizer_type ras_img(ren_img);
draw_curve(patt, ras_img, ren_img, p1, m_curve1.curve());
draw_curve(patt, ras_img, ren_img, p2, m_curve2.curve());
draw_curve(patt, ras_img, ren_img, p3, m_curve3.curve());
draw_curve(patt, ras_img, ren_img, p4, m_curve4.curve());
draw_curve(patt, ras_img, ren_img, p5, m_curve5.curve());
draw_curve(patt, ras_img, ren_img, p6, m_curve6.curve());
draw_curve(patt, ras_img, ren_img, p7, m_curve7.curve());
draw_curve(patt, ras_img, ren_img, p8, m_curve8.curve());
draw_curve(patt, ras_img, ren_img, p9, m_curve9.curve());
agg::render_ctrl(ras, sl, ren_base, m_curve1);
agg::render_ctrl(ras, sl, ren_base, m_curve2);
agg::render_ctrl(ras, sl, ren_base, m_curve3);
agg::render_ctrl(ras, sl, ren_base, m_curve4);
agg::render_ctrl(ras, sl, ren_base, m_curve5);
agg::render_ctrl(ras, sl, ren_base, m_curve6);
agg::render_ctrl(ras, sl, ren_base, m_curve7);
agg::render_ctrl(ras, sl, ren_base, m_curve8);
agg::render_ctrl(ras, sl, ren_base, m_curve9);
agg::render_ctrl(ras, sl, ren_base, m_scale_x);
agg::render_ctrl(ras, sl, ren_base, m_start_x);
}
void grid_node_t::do_process( const render::context_t& context)
{
Imath::Color4f color( get_value<Imath::Color4f>( param( "bgcol")));
boost::gil::fill_pixels( image_view(), image::pixel_t( color.r, color.g, color.b, color.a));
Imath::V2f size( get_absolute_value<Imath::V2f>( param( "size")));
Imath::V2f translate( get_absolute_value<Imath::V2f>( param( "translate")));
Imath::V2f line_width( get_absolute_value<Imath::V2f>( param( "linewidth")));
color = get_value<Imath::Color4f>( param( "fgcol"));
// adjust params
size.x = size.x / context.subsample / aspect_ratio();
size.y /= context.subsample;
if( size.x == 0 || size.y == 0)
return;
translate.x = translate.x / context.subsample / aspect_ratio();
translate.y /= context.subsample;
line_width.x = line_width.x / context.subsample / aspect_ratio();
line_width.y /= context.subsample;
if( line_width.x == 0 || line_width.y == 0)
return;
// setup agg
typedef image::agg_rgba32f_renderer_t ren_base_type;
typedef ren_base_type::color_type color_type;
typedef agg::renderer_scanline_aa_solid<ren_base_type> renderer_type;
ren_base_type ren_base( image_view());
renderer_type ren( ren_base);
agg::rasterizer_scanline_aa<> ras;
ras.gamma( agg::gamma_none());
agg::scanline_u8 sl;
ras.reset();
agg::path_storage path;
agg::conv_stroke<agg::path_storage> stroke_conv( path);
// Vertical
stroke_conv.width( line_width.x);
int w = image_view().width();
int h = image_view().height();
Imath::Box2f area( defined().min - translate,
defined().max - translate);
float x = Imath::Math<float>::floor( area.min.x / size.x) * size.x;
for( ; x < area.max.x + line_width.x; x += size.x)
{
path.move_to( x - area.min.x, 0);
path.line_to( x - area.min.x, h);
}
ras.add_path( stroke_conv);
ren.color( image::pixel_t( color.r, color.g, color.b, color.a));
agg::render_scanlines( ras, sl, ren);
// Horizontal
path.remove_all();
stroke_conv.width( line_width.y);
float y = Imath::Math<float>::floor( area.min.y / size.y) * size.y;
for( ; y < area.max.y + line_width.y; y += size.y)
{
path.move_to( 0, y - area.min.y);
path.line_to( w, y - area.min.y);
}
ras.add_path( stroke_conv);
ren.color( image::pixel_t( color.r, color.g, color.b, color.a));
agg::render_scanlines( ras, sl, ren);
}
void agg_renderer<T0,T1>::process(line_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
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>;
std::string filename = get<std::string>(sym, keys::file, feature, common_.vars_);
if (filename.empty()) return;
boost::optional<mapnik::marker_ptr> marker_ptr = marker_cache::instance().find(filename, true);
if (!marker_ptr || !(*marker_ptr)) return;
boost::optional<image_ptr> pat;
// TODO - re-implement at renderer level like polygon_pattern symbolizer
double opacity = get<value_double>(sym, keys::opacity, feature, common_.vars_,1.0);
if ((*marker_ptr)->is_bitmap())
{
pat = (*marker_ptr)->get_bitmap_data();
}
else
{
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);
pat = render_pattern(*ras_ptr, **marker_ptr, image_tr, 1.0);
}
if (!pat) return;
bool clip = get<value_bool>(sym, keys::clip, feature, common_.vars_, false);
double offset = get<value_double>(sym, keys::offset, feature, common_.vars_, 0.0);
double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, common_.vars_, 0.0);
double smooth = get<value_double>(sym, keys::smooth, feature, common_.vars_, false);
agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(), current_buffer_->width() * 4);
pixfmt_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, src_over)));
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(*(*pat), opacity);
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
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());
double half_stroke = (*marker_ptr)->width()/2.0;
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 conv_types = boost::mpl::vector<clip_line_tag, transform_tag,
affine_transform_tag,
simplify_tag,smooth_tag,
offset_transform_tag>;
vertex_converter<box2d<double>, rasterizer_type, line_pattern_symbolizer,
view_transform, proj_transform, agg::trans_affine, conv_types, feature_impl>
converter(clip_box,ras,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
if (clip) converter.set<clip_line_tag>(); //optional clip (default: true)
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
for (geometry_type & geom : feature.paths())
{
if (geom.size() > 1)
{
converter.apply(geom);
}
}
}
void render_gouraud(Scanline& sl, Ras& ras)
{
double alpha = m_alpha.value();
double brc = 1;
typedef agg::renderer_base<pixfmt> base_ren_type;
#ifdef AGG_GRAY8
typedef agg::span_gouraud_gray<color_type> span_gen_type;
#else
typedef agg::span_gouraud_rgba<color_type> span_gen_type;
#endif
typedef agg::span_allocator<color_type> span_alloc_type;
pixfmt pf(rbuf_window());
base_ren_type ren_base(pf);
span_alloc_type span_alloc;
span_gen_type span_gen;
ras.gamma(agg::gamma_linear(0.0, m_gamma.value()));
double d = m_dilation.value();
// Single triangle
//span_gen.colors(agg::rgba(1, 0, 0, alpha),
// agg::rgba(0, 1, 0, alpha),
// agg::rgba(0, 0, 1, alpha));
//span_gen.triangle(m_x[0], m_y[0], m_x[1], m_y[1], m_x[2], m_y[2], d);
//ras.add_path(span_gen);
//agg::render_scanlines_aa(ras, sl, ren_base, span_alloc, span_gen);
// Six triangles
double xc = (m_x[0] + m_x[1] + m_x[2]) / 3.0;
double yc = (m_y[0] + m_y[1] + m_y[2]) / 3.0;
double x1 = (m_x[1] + m_x[0]) / 2 - (xc - (m_x[1] + m_x[0]) / 2);
double y1 = (m_y[1] + m_y[0]) / 2 - (yc - (m_y[1] + m_y[0]) / 2);
double x2 = (m_x[2] + m_x[1]) / 2 - (xc - (m_x[2] + m_x[1]) / 2);
double y2 = (m_y[2] + m_y[1]) / 2 - (yc - (m_y[2] + m_y[1]) / 2);
double x3 = (m_x[0] + m_x[2]) / 2 - (xc - (m_x[0] + m_x[2]) / 2);
double y3 = (m_y[0] + m_y[2]) / 2 - (yc - (m_y[0] + m_y[2]) / 2);
span_gen.colors(agg::rgba(1, 0, 0, alpha),
agg::rgba(0, 1, 0, alpha),
agg::rgba(brc, brc, brc, alpha));
span_gen.triangle(m_x[0], m_y[0], m_x[1], m_y[1], xc, yc, d);
ras.add_path(span_gen);
agg::render_scanlines_aa(ras, sl, ren_base, span_alloc, span_gen);
span_gen.colors(agg::rgba(0, 1, 0, alpha),
agg::rgba(0, 0, 1, alpha),
agg::rgba(brc, brc, brc, alpha));
span_gen.triangle(m_x[1], m_y[1], m_x[2], m_y[2], xc, yc, d);
ras.add_path(span_gen);
agg::render_scanlines_aa(ras, sl, ren_base, span_alloc, span_gen);
span_gen.colors(agg::rgba(0, 0, 1, alpha),
agg::rgba(1, 0, 0, alpha),
agg::rgba(brc, brc, brc, alpha));
span_gen.triangle(m_x[2], m_y[2], m_x[0], m_y[0], xc, yc, d);
ras.add_path(span_gen);
agg::render_scanlines_aa(ras, sl, ren_base, span_alloc, span_gen);
brc = 1-brc;
span_gen.colors(agg::rgba(1, 0, 0, alpha),
agg::rgba(0, 1, 0, alpha),
agg::rgba(brc, brc, brc, alpha));
span_gen.triangle(m_x[0], m_y[0], m_x[1], m_y[1], x1, y1, d);
ras.add_path(span_gen);
agg::render_scanlines_aa(ras, sl, ren_base, span_alloc, span_gen);
span_gen.colors(agg::rgba(0, 1, 0, alpha),
agg::rgba(0, 0, 1, alpha),
agg::rgba(brc, brc, brc, alpha));
span_gen.triangle(m_x[1], m_y[1], m_x[2], m_y[2], x2, y2, d);
ras.add_path(span_gen);
agg::render_scanlines_aa(ras, sl, ren_base, span_alloc, span_gen);
span_gen.colors(agg::rgba(0, 0, 1, alpha),
agg::rgba(1, 0, 0, alpha),
agg::rgba(brc, brc, brc, alpha));
span_gen.triangle(m_x[2], m_y[2], m_x[0], m_y[0], x3, y3, d);
ras.add_path(span_gen);
agg::render_scanlines_aa(ras, sl, ren_base, span_alloc, span_gen);
}
void operator() (marker_svg const& marker) 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_);
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);
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(image, opacity);
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
double half_stroke = std::max(marker.width()/2.0,marker.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());
}
void operator() (marker_rgba8 const& marker)
{
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_);
mapnik::image_rgba8 const& image = marker.get_data();
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_->getBytes(),current_buffer_->width(),current_buffer_->height(), current_buffer_->getRowSize());
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(image, opacity);
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
ren.clip_box(0,0,common_.width_,common_.height_);
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());
double half_stroke = marker.width()/2.0;
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);
}
vertex_converter<rasterizer_type, clip_line_tag, transform_tag,
affine_transform_tag,
simplify_tag,smooth_tag,
offset_transform_tag>
converter(clip_box,ras,sym_,common_.t_,prj_trans_,tr,feature_,common_.vars_,common_.scale_factor_);
if (clip) converter.set<clip_line_tag>(); //optional clip (default: true)
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
for (geometry_type const& geom : feature_.paths())
{
if (geom.size() > 1)
{
vertex_adapter va(geom);
converter.apply(va);
}
}
}