686 lines
20 KiB
C++
686 lines
20 KiB
C++
#include <stdio.h>
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#include "agg_conv_gpc.h"
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_scanline_u.h"
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#include "agg_scanline_p.h"
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#include "agg_renderer_scanline.h"
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#include "agg_renderer_primitives.h"
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#include "agg_conv_curve.h"
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#include "agg_conv_stroke.h"
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#include "agg_conv_clip_polygon.h"
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#include "agg_gsv_text.h"
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#include "agg_pixfmt_rgb.h"
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#include "platform/agg_platform_support.h"
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#include "ctrl/agg_slider_ctrl.h"
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#include "ctrl/agg_cbox_ctrl.h"
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#include "ctrl/agg_rbox_ctrl.h"
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#define AGG_BGR24
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//#define AGG_BGR96
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#include "pixel_formats.h"
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enum flip_y_e { flip_y = true };
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class spiral
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{
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public:
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spiral(double x, double y, double r1, double r2, double step, double start_angle=0) :
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m_x(x),
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m_y(y),
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m_r1(r1),
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m_r2(r2),
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m_step(step),
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m_start_angle(start_angle),
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m_angle(start_angle),
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m_da(agg::deg2rad(4.0)),
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m_dr(m_step / 90.0)
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{
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}
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void rewind(unsigned)
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{
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m_angle = m_start_angle;
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m_curr_r = m_r1;
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m_start = true;
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}
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unsigned vertex(double* x, double* y)
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{
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if(m_curr_r > m_r2) return agg::path_cmd_stop;
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*x = m_x + cos(m_angle) * m_curr_r;
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*y = m_y + sin(m_angle) * m_curr_r;
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m_curr_r += m_dr;
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m_angle += m_da;
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if(m_start)
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{
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m_start = false;
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return agg::path_cmd_move_to;
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}
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return agg::path_cmd_line_to;
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}
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private:
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double m_x;
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double m_y;
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double m_r1;
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double m_r2;
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double m_step;
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double m_start_angle;
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double m_angle;
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double m_curr_r;
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double m_da;
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double m_dr;
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bool m_start;
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};
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namespace agg
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{
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// A simple counter of points and contours
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template<class Src> struct conv_poly_counter
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{
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unsigned m_contours;
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unsigned m_points;
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conv_poly_counter(Src& src) : m_src(&src), m_contours(0), m_points(0) {}
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void rewind(unsigned path_id)
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{
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m_contours = 0;
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m_points = 0;
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m_src->rewind(path_id);
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}
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unsigned vertex(double* x, double* y)
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{
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unsigned cmd = m_src->vertex(x, y);
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if(is_vertex(cmd)) ++m_points;
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if(is_move_to(cmd)) ++m_contours;
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return cmd;
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}
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private:
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Src* m_src;
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};
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}
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void make_gb_poly(agg::path_storage& ps);
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void make_arrows(agg::path_storage& ps);
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class the_application : public agg::platform_support
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{
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agg::rbox_ctrl<color_type> m_polygons;
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agg::rbox_ctrl<color_type> m_operation;
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double m_x;
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double m_y;
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public:
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the_application(agg::pix_format_e format, bool flip_y) :
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agg::platform_support(format, flip_y),
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m_polygons (5.0, 5.0, 5.0+205.0, 110.0, !flip_y),
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m_operation(555.0, 5.0, 555.0+80.0, 130.0, !flip_y)
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{
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m_operation.add_item("None");
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m_operation.add_item("OR");
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m_operation.add_item("AND");
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m_operation.add_item("XOR");
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m_operation.add_item("A-B");
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m_operation.add_item("B-A");
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m_operation.cur_item(2);
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add_ctrl(m_operation);
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m_polygons.add_item("Two Simple Paths");
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m_polygons.add_item("Closed Stroke");
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m_polygons.add_item("Great Britain and Arrows");
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m_polygons.add_item("Great Britain and Spiral");
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m_polygons.add_item("Spiral and Glyph");
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m_polygons.cur_item(3);
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add_ctrl(m_polygons);
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}
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template<class Scanline, class Ras, class Ren, class Gpc>
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void perform_rendering(Scanline& sl, Ras& ras, Ren& ren, Gpc& gpc)
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{
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if(m_operation.cur_item() > 0)
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{
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ras.reset();
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switch(m_operation.cur_item())
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{
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case 1: gpc.operation(agg::gpc_or); break;
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case 2: gpc.operation(agg::gpc_and); break;
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case 3: gpc.operation(agg::gpc_xor); break;
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case 4: gpc.operation(agg::gpc_a_minus_b); break;
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case 5: gpc.operation(agg::gpc_b_minus_a); break;
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}
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agg::conv_poly_counter<Gpc> counter(gpc);
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start_timer();
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counter.rewind(0);
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double t1 = elapsed_time();
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ras.reset();
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double x;
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double y;
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unsigned cmd;
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start_timer();
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while(!agg::is_stop(cmd = counter.vertex(&x, &y)))
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{
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ras.add_vertex(x, y, cmd);
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}
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ren.color(agg::rgba(0.5, 0.0, 0, 0.5));
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agg::render_scanlines(ras, sl, ren);
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double t2 = elapsed_time();
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char buf[100];
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sprintf(buf, "Contours: %d Points: %d", counter.m_contours, counter.m_points);
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agg::gsv_text txt;
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agg::conv_stroke<agg::gsv_text> txt_stroke(txt);
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txt_stroke.width(1.5);
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txt_stroke.line_cap(agg::round_cap);
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txt.size(10.0);
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txt.start_point(250, 5);
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txt.text(buf);
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ras.add_path(txt_stroke);
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ren.color(agg::rgba(0.0, 0.0, 0.0));
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agg::render_scanlines(ras, sl, ren);
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sprintf(buf, "GPC=%.3fms Render=%.3fms", t1, t2);
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txt.start_point(250, 20);
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txt.text(buf);
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ras.add_path(txt_stroke);
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ren.color(agg::rgba(0.0, 0.0, 0.0));
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agg::render_scanlines(ras, sl, ren);
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}
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}
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template<class Scanline, class Ras>
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unsigned render_gpc(Scanline& sl, Ras& ras)
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{
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pixfmt pf(rbuf_window());
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agg::renderer_base<pixfmt> rb(pf);
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agg::renderer_scanline_aa_solid<agg::renderer_base<pixfmt> > ren(rb);
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switch(m_polygons.cur_item())
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{
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case 0:
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{
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//------------------------------------
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// Two simple paths
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//
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agg::path_storage ps1;
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agg::path_storage ps2;
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agg::conv_gpc<agg::path_storage, agg::path_storage> gpc(ps1, ps2);
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double x = m_x - initial_width()/2 + 100;
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double y = m_y - initial_height()/2 + 100;
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ps1.move_to(x+140, y+145);
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ps1.line_to(x+225, y+44);
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ps1.line_to(x+296, y+219);
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ps1.close_polygon();
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ps1.line_to(x+226, y+289);
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ps1.line_to(x+82, y+292);
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ps1.move_to(x+220, y+222);
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ps1.line_to(x+363, y+249);
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ps1.line_to(x+265, y+331);
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ps1.move_to(x+242, y+243);
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ps1.line_to(x+268, y+309);
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ps1.line_to(x+325, y+261);
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ps1.move_to(x+259, y+259);
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ps1.line_to(x+273, y+288);
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ps1.line_to(x+298, y+266);
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ps2.move_to(100+32, 100+77);
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ps2.line_to(100+473, 100+263);
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ps2.line_to(100+351, 100+290);
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ps2.line_to(100+354, 100+374);
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ras.reset();
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ras.add_path(ps1);
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ren.color(agg::rgba(0, 0, 0, 0.1));
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agg::render_scanlines(ras, sl, ren);
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ras.reset();
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ras.add_path(ps2);
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ren.color(agg::rgba(0, 0.6, 0, 0.1));
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agg::render_scanlines(ras, sl, ren);
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perform_rendering(sl, ras, ren, gpc);
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}
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break;
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case 1:
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{
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//------------------------------------
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// Closed stroke
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//
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agg::path_storage ps1;
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agg::path_storage ps2;
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agg::conv_stroke<agg::path_storage> stroke(ps2);
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stroke.width(10.0);
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agg::conv_gpc<agg::path_storage,
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agg::conv_stroke<agg::path_storage> > gpc(ps1, stroke);
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double x = m_x - initial_width()/2 + 100;
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double y = m_y - initial_height()/2 + 100;
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ps1.move_to(x+140, y+145);
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ps1.line_to(x+225, y+44);
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ps1.line_to(x+296, y+219);
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ps1.close_polygon();
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ps1.line_to(x+226, y+289);
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ps1.line_to(x+82, y+292);
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ps1.move_to(x+220-50, y+222);
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ps1.line_to(x+265-50, y+331);
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ps1.line_to(x+363-50, y+249);
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ps1.close_polygon(agg::path_flags_ccw);
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ps2.move_to(100+32, 100+77);
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ps2.line_to(100+473, 100+263);
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ps2.line_to(100+351, 100+290);
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ps2.line_to(100+354, 100+374);
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ps2.close_polygon();
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ras.reset();
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ras.add_path(ps1);
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ren.color(agg::rgba(0, 0, 0, 0.1));
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agg::render_scanlines(ras, sl, ren);
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ras.reset();
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ras.add_path(stroke);
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ren.color(agg::rgba(0, 0.6, 0, 0.1));
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agg::render_scanlines(ras, sl, ren);
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perform_rendering(sl, ras, ren, gpc);
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}
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break;
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case 2:
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{
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//------------------------------------
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// Great Britain and Arrows
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//
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agg::path_storage gb_poly;
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agg::path_storage arrows;
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make_gb_poly(gb_poly);
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make_arrows(arrows);
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agg::trans_affine mtx1;
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agg::trans_affine mtx2;
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mtx1 *= agg::trans_affine_translation(-1150, -1150);
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mtx1 *= agg::trans_affine_scaling(2.0);
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mtx2 = mtx1;
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mtx2 *= agg::trans_affine_translation(m_x - initial_width()/2,
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m_y - initial_height()/2);
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agg::conv_transform<agg::path_storage> trans_gb_poly(gb_poly, mtx1);
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agg::conv_transform<agg::path_storage> trans_arrows(arrows, mtx2);
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agg::conv_gpc<agg::conv_transform<agg::path_storage>,
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agg::conv_transform<agg::path_storage> > gpc(trans_gb_poly, trans_arrows);
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ras.add_path(trans_gb_poly);
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ren.color(agg::rgba(0.5, 0.5, 0, 0.1));
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agg::render_scanlines(ras, sl, ren);
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agg::conv_stroke<agg::conv_transform<agg::path_storage> > stroke_gb_poly(trans_gb_poly);
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stroke_gb_poly.width(0.1);
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ras.add_path(stroke_gb_poly);
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ren.color(agg::rgba(0, 0, 0));
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agg::render_scanlines(ras, sl, ren);
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ras.add_path(trans_arrows);
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ren.color(agg::rgba(0.0, 0.5, 0.5, 0.1));
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agg::render_scanlines(ras, sl, ren);
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perform_rendering(sl, ras, ren, gpc);
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}
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break;
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case 3:
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{
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//------------------------------------
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// Great Britain and a Spiral
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//
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spiral sp(m_x, m_y, 10, 150, 30, 0.0);
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agg::conv_stroke<spiral> stroke(sp);
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stroke.width(15.0);
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agg::path_storage gb_poly;
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make_gb_poly(gb_poly);
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agg::trans_affine mtx;
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mtx *= agg::trans_affine_translation(-1150, -1150);
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mtx *= agg::trans_affine_scaling(2.0);
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agg::conv_transform<agg::path_storage> trans_gb_poly(gb_poly, mtx);
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agg::conv_gpc<agg::conv_transform<agg::path_storage>,
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agg::conv_stroke<spiral> > gpc(trans_gb_poly, stroke);
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/*
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FILE* fd = fopen("contours.txt", "w");
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if(fd)
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{
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unsigned cmd;
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double x, y;
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trans_gb_poly.rewind(0);
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while(!agg::is_stop(cmd = trans_gb_poly.vertex(&x, &y)))
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{
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if(agg::is_move_to(cmd))
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{
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fprintf(fd, "\npoly[] = {\n");
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}
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fprintf(fd, " %.3f, %.3f,\n", x, y);
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}
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stroke.rewind(0);
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while(!agg::is_stop(cmd = stroke.vertex(&x, &y)))
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{
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if(agg::is_move_to(cmd))
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{
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fprintf(fd, "\nspiral[] = {\n");
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}
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fprintf(fd, " %.3f, %.3f,\n", x, y);
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}
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fclose(fd);
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}
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*/
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ras.add_path(trans_gb_poly);
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ren.color(agg::rgba(0.5, 0.5, 0, 0.1));
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agg::render_scanlines(ras, sl, ren);
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agg::conv_stroke<agg::conv_transform<agg::path_storage> > stroke_gb_poly(trans_gb_poly);
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stroke_gb_poly.width(0.1);
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ras.add_path(stroke_gb_poly);
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ren.color(agg::rgba(0, 0, 0));
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agg::render_scanlines(ras, sl, ren);
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ras.add_path(stroke);
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ren.color(agg::rgba(0.0, 0.5, 0.5, 0.1));
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agg::render_scanlines(ras, sl, ren);
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perform_rendering(sl, ras, ren, gpc);
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}
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break;
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case 4:
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{
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//------------------------------------
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// Spiral and glyph
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//
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spiral sp(m_x, m_y, 10, 150, 30, 0.0);
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agg::conv_stroke<spiral> stroke(sp);
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stroke.width(15.0);
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agg::path_storage glyph;
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glyph.move_to(28.47, 6.45);
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glyph.curve3(21.58, 1.12, 19.82, 0.29);
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glyph.curve3(17.19, -0.93, 14.21, -0.93);
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glyph.curve3(9.57, -0.93, 6.57, 2.25);
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glyph.curve3(3.56, 5.42, 3.56, 10.60);
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glyph.curve3(3.56, 13.87, 5.03, 16.26);
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glyph.curve3(7.03, 19.58, 11.99, 22.51);
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glyph.curve3(16.94, 25.44, 28.47, 29.64);
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glyph.line_to(28.47, 31.40);
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glyph.curve3(28.47, 38.09, 26.34, 40.58);
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glyph.curve3(24.22, 43.07, 20.17, 43.07);
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glyph.curve3(17.09, 43.07, 15.28, 41.41);
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glyph.curve3(13.43, 39.75, 13.43, 37.60);
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glyph.line_to(13.53, 34.77);
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glyph.curve3(13.53, 32.52, 12.38, 31.30);
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glyph.curve3(11.23, 30.08, 9.38, 30.08);
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glyph.curve3(7.57, 30.08, 6.42, 31.35);
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glyph.curve3(5.27, 32.62, 5.27, 34.81);
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glyph.curve3(5.27, 39.01, 9.57, 42.53);
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glyph.curve3(13.87, 46.04, 21.63, 46.04);
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glyph.curve3(27.59, 46.04, 31.40, 44.04);
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glyph.curve3(34.28, 42.53, 35.64, 39.31);
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glyph.curve3(36.52, 37.21, 36.52, 30.71);
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glyph.line_to(36.52, 15.53);
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glyph.curve3(36.52, 9.13, 36.77, 7.69);
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glyph.curve3(37.01, 6.25, 37.57, 5.76);
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glyph.curve3(38.13, 5.27, 38.87, 5.27);
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glyph.curve3(39.65, 5.27, 40.23, 5.62);
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glyph.curve3(41.26, 6.25, 44.19, 9.18);
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glyph.line_to(44.19, 6.45);
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glyph.curve3(38.72, -0.88, 33.74, -0.88);
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glyph.curve3(31.35, -0.88, 29.93, 0.78);
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glyph.curve3(28.52, 2.44, 28.47, 6.45);
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glyph.close_polygon();
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glyph.move_to(28.47, 9.62);
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glyph.line_to(28.47, 26.66);
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glyph.curve3(21.09, 23.73, 18.95, 22.51);
|
|
glyph.curve3(15.09, 20.36, 13.43, 18.02);
|
|
glyph.curve3(11.77, 15.67, 11.77, 12.89);
|
|
glyph.curve3(11.77, 9.38, 13.87, 7.06);
|
|
glyph.curve3(15.97, 4.74, 18.70, 4.74);
|
|
glyph.curve3(22.41, 4.74, 28.47, 9.62);
|
|
glyph.close_polygon();
|
|
|
|
agg::trans_affine mtx;
|
|
mtx *= agg::trans_affine_scaling(4.0);
|
|
mtx *= agg::trans_affine_translation(220, 200);
|
|
agg::conv_transform<agg::path_storage> trans(glyph, mtx);
|
|
agg::conv_curve<agg::conv_transform<agg::path_storage> > curve(trans);
|
|
|
|
agg::conv_gpc<agg::conv_stroke<spiral>,
|
|
agg::conv_curve<
|
|
agg::conv_transform<
|
|
agg::path_storage> > > gpc(stroke, curve);
|
|
|
|
ras.reset();
|
|
ras.add_path(stroke);
|
|
ren.color(agg::rgba(0, 0, 0, 0.1));
|
|
agg::render_scanlines(ras, sl, ren);
|
|
|
|
ras.reset();
|
|
ras.add_path(curve);
|
|
ren.color(agg::rgba(0, 0.6, 0, 0.1));
|
|
agg::render_scanlines(ras, sl, ren);
|
|
|
|
perform_rendering(sl, ras, ren, gpc);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
virtual void on_init()
|
|
{
|
|
m_x = width() / 2.0;
|
|
m_y = height() / 2.0;
|
|
}
|
|
|
|
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_gpc(sl, ras);
|
|
|
|
agg::render_ctrl(ras, sl, ren_base, m_polygons);
|
|
agg::render_ctrl(ras, sl, ren_base, m_operation);
|
|
}
|
|
|
|
|
|
/*
|
|
// Stress-test.
|
|
// Works quite well on random polygons, no crashes, no memory leaks!
|
|
// Sometimes takes long to produce the result
|
|
|
|
double random(double min, double max)
|
|
{
|
|
int r = (rand() << 15) | rand();
|
|
return ((r & 0xFFFFFFF) / double(0xFFFFFFF + 1)) * (max - min) + min;
|
|
}
|
|
|
|
|
|
virtual void on_mouse_button_down(int x, int y, unsigned flags)
|
|
{
|
|
agg::scanline_u8 sl;
|
|
agg::rasterizer_scanline_aa<> ras;
|
|
|
|
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);
|
|
|
|
agg::path_storage ps1;
|
|
agg::path_storage ps2;
|
|
|
|
agg::conv_gpc<agg::path_storage, agg::path_storage> gpc(ps1, ps2);
|
|
|
|
unsigned i;
|
|
for(i = 0; i < 1000; i++)
|
|
{
|
|
ren_base.clear(agg::rgba(1,1,1));
|
|
|
|
unsigned num_poly1 = rand() % 10 + 1;
|
|
unsigned num_poly2 = rand() % 10 + 1;
|
|
unsigned j;
|
|
|
|
ps1.remove_all();
|
|
ps2.remove_all();
|
|
|
|
for(j = 0; j < num_poly1; j++)
|
|
{
|
|
ps1.move_to(random(0, width()), random(0, height()));
|
|
unsigned k;
|
|
unsigned np = rand() % 20 + 2;
|
|
for(k = 0; k < np; k++)
|
|
{
|
|
ps1.line_to(random(0, width()), random(0, height()));
|
|
}
|
|
}
|
|
|
|
for(j = 0; j < num_poly2; j++)
|
|
{
|
|
ps2.move_to(random(0, width()), random(0, height()));
|
|
unsigned k;
|
|
unsigned np = rand() % 20 + 2;
|
|
for(k = 0; k < np; k++)
|
|
{
|
|
ps2.line_to(random(0, width()), random(0, height()));
|
|
}
|
|
}
|
|
|
|
unsigned op = rand() % 5;
|
|
switch(op)
|
|
{
|
|
case 0: gpc.operation(agg::gpc_or); break;
|
|
case 1: gpc.operation(agg::gpc_and); break;
|
|
case 2: gpc.operation(agg::gpc_xor); break;
|
|
case 3: gpc.operation(agg::gpc_a_minus_b); break;
|
|
case 4: gpc.operation(agg::gpc_b_minus_a); break;
|
|
}
|
|
|
|
|
|
ras.add_path(gpc);
|
|
ren_solid.color(agg::rgba(0.5, 0.0, 0, 0.5));
|
|
agg::render_scanlines(ras, sl, ren_solid);
|
|
update_window();
|
|
|
|
}
|
|
|
|
message("Done");
|
|
}
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
virtual void on_mouse_button_down(int x, int y, unsigned flags)
|
|
{
|
|
if(flags & agg::mouse_left)
|
|
{
|
|
m_x = x;
|
|
m_y = y;
|
|
force_redraw();
|
|
}
|
|
|
|
if(flags & agg::mouse_right)
|
|
{
|
|
char buf[100];
|
|
sprintf(buf, "%d %d", x, y);
|
|
message(buf);
|
|
}
|
|
}
|
|
|
|
|
|
virtual void on_mouse_move(int x, int y, unsigned flags)
|
|
{
|
|
if(flags & agg::mouse_left)
|
|
{
|
|
m_x = x;
|
|
m_y = y;
|
|
force_redraw();
|
|
}
|
|
}
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
int agg_main(int argc, char* argv[])
|
|
{
|
|
the_application app(pix_format, flip_y);
|
|
app.caption("AGG Example. General Polygon Clipping (GPC)");
|
|
|
|
if(app.init(640, 520, agg::window_resize))
|
|
{
|
|
return app.run();
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|