287 lines
8.2 KiB
C++
287 lines
8.2 KiB
C++
#include <math.h>
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#include <stdio.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_conv_stroke.h"
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#include "agg_conv_dash.h"
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#include "agg_conv_curve.h"
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#include "agg_conv_contour.h"
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#include "agg_conv_smooth_poly1.h"
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#include "agg_conv_marker.h"
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#include "agg_arrowhead.h"
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#include "agg_vcgen_markers_term.h"
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#include "agg_scanline_u.h"
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#include "agg_renderer_scanline.h"
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#include "agg_pixfmt_rgb.h"
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#include "ctrl/agg_slider_ctrl.h"
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#include "ctrl/agg_rbox_ctrl.h"
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#include "ctrl/agg_cbox_ctrl.h"
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#include "platform/agg_platform_support.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 the_application : public agg::platform_support
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{
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double m_x[3];
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double m_y[3];
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double m_dx;
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double m_dy;
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int m_idx;
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agg::rbox_ctrl<color_type> m_cap;
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agg::slider_ctrl<color_type> m_width;
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agg::slider_ctrl<color_type> m_smooth;
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agg::cbox_ctrl<color_type> m_close;
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agg::cbox_ctrl<color_type> m_even_odd;
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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_idx(-1),
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m_cap(10.0, 10.0, 130.0, 80.0, !flip_y),
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m_width(130 + 10.0, 10.0 + 4.0, 130 + 150.0, 10.0 + 8.0 + 4.0, !flip_y),
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m_smooth(130 + 150.0 + 10.0, 10.0 + 4.0, 500 - 10.0, 10.0 + 8.0 + 4.0, !flip_y),
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m_close(130 + 10.0, 10.0 + 4.0 + 16.0, "Close Polygons", !flip_y),
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m_even_odd(130 + 150.0 + 10.0, 10.0 + 4.0 + 16.0, "Even-Odd Fill", !flip_y)
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{
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m_x[0] = 57 + 100; m_y[0] = 60;
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m_x[1] = 369 + 100; m_y[1] = 170;
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m_x[2] = 143 + 100; m_y[2] = 310;
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add_ctrl(m_cap);
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m_cap.add_item("Butt Cap");
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m_cap.add_item("Square Cap");
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m_cap.add_item("Round Cap");
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m_cap.cur_item(0);
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m_cap.no_transform();
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add_ctrl(m_width);
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m_width.range(0.0, 10.0);
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m_width.value(3.0);
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m_width.label("Width=%1.2f");
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m_width.no_transform();
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add_ctrl(m_smooth);
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m_smooth.range(0.0, 2.0);
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m_smooth.value(1.0);
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m_smooth.label("Smooth=%1.2f");
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m_smooth.no_transform();
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add_ctrl(m_close);
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m_close.no_transform();
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add_ctrl(m_even_odd);
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m_even_odd.no_transform();
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}
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virtual void on_init()
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{
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}
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virtual void on_draw()
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{
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typedef agg::renderer_base<pixfmt> ren_base;
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pixfmt pixf(rbuf_window());
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ren_base renb(pixf);
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renb.clear(agg::rgba(1, 1, 1));
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agg::rasterizer_scanline_aa<> ras;
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agg::scanline_u8 sl;
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agg::line_cap_e cap = agg::butt_cap;
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if(m_cap.cur_item() == 1) cap = agg::square_cap;
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if(m_cap.cur_item() == 2) cap = agg::round_cap;
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// Here we declare a very cheap-in-use path storage.
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// It allocates space for at most 20 vertices in stack and
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// never allocates memory. But be aware that adding more than
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// 20 vertices is fatal!
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//------------------------
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typedef agg::path_base<
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agg::vertex_stl_storage<
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agg::pod_auto_vector<
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agg::vertex_d, 20> > > path_storage_type;
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path_storage_type path;
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path.move_to(m_x[0], m_y[0]);
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path.line_to(m_x[1], m_y[1]);
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path.line_to((m_x[0]+m_x[1]+m_x[2]) / 3.0, (m_y[0]+m_y[1]+m_y[2]) / 3.0);
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path.line_to(m_x[2], m_y[2]);
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if(m_close.status()) path.close_polygon();
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path.move_to((m_x[0] + m_x[1]) / 2, (m_y[0] + m_y[1]) / 2);
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path.line_to((m_x[1] + m_x[2]) / 2, (m_y[1] + m_y[2]) / 2);
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path.line_to((m_x[2] + m_x[0]) / 2, (m_y[2] + m_y[0]) / 2);
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if(m_close.status()) path.close_polygon();
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if(m_even_odd.status()) ras.filling_rule(agg::fill_even_odd);
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// (1)
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ras.add_path(path);
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agg::render_scanlines_aa_solid(ras, sl, renb, agg::rgba(0.7, 0.5, 0.1, 0.5));
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// (1)
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// Start of (2, 3, 4)
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agg::conv_smooth_poly1<path_storage_type> smooth(path);
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smooth.smooth_value(m_smooth.value());
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// (2)
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ras.add_path(smooth);
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agg::render_scanlines_aa_solid(ras, sl, renb, agg::rgba(0.1, 0.5, 0.7, 0.1));
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// (2)
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// (3)
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agg::conv_stroke<agg::conv_smooth_poly1<path_storage_type> > smooth_outline(smooth);
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ras.add_path(smooth_outline);
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agg::render_scanlines_aa_solid(ras, sl, renb, agg::rgba(0.0, 0.6, 0.0, 0.8));
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// (3)
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// (4)
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agg::conv_curve<agg::conv_smooth_poly1<path_storage_type> > curve(smooth);
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agg::conv_dash<agg::conv_curve<agg::conv_smooth_poly1<path_storage_type> >, agg::vcgen_markers_term> dash(curve);
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agg::conv_stroke<agg::conv_dash<agg::conv_curve<agg::conv_smooth_poly1<path_storage_type> >, agg::vcgen_markers_term> > stroke(dash);
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stroke.line_cap(cap);
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stroke.width(m_width.value());
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double k = ::pow(m_width.value(), 0.7);
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agg::arrowhead ah;
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ah.head(4 * k, 4 * k, 3 * k, 2 * k);
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if(!m_close.status()) ah.tail(1 * k, 1.5 * k, 3 * k, 5 * k);
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agg::conv_marker<agg::vcgen_markers_term, agg::arrowhead> arrow(dash.markers(), ah);
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dash.add_dash(20.0, 5.0);
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dash.add_dash(5.0, 5.0);
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dash.add_dash(5.0, 5.0);
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dash.dash_start(10);
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ras.add_path(stroke);
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ras.add_path(arrow);
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agg::render_scanlines_aa_solid(ras, sl, renb, agg::rgba(0.0, 0.0, 0.0));
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// (4)
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ras.filling_rule(agg::fill_non_zero);
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agg::render_ctrl(ras, sl, renb, m_cap);
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agg::render_ctrl(ras, sl, renb, m_width);
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agg::render_ctrl(ras, sl, renb, m_smooth);
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agg::render_ctrl(ras, sl, renb, m_close);
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agg::render_ctrl(ras, sl, renb, m_even_odd);
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}
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virtual void on_mouse_button_down(int x, int y, unsigned flags)
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{
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if(flags & agg::mouse_left)
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{
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unsigned i;
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for (i = 0; i < 3; i++)
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{
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if(sqrt( (x-m_x[i]) * (x-m_x[i]) + (y-m_y[i]) * (y-m_y[i]) ) < 20.0)
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{
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m_dx = x - m_x[i];
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m_dy = y - m_y[i];
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m_idx = i;
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break;
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}
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}
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if(i == 3)
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{
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if(agg::point_in_triangle(m_x[0], m_y[0],
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m_x[1], m_y[1],
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m_x[2], m_y[2],
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x, y))
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{
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m_dx = x - m_x[0];
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m_dy = y - m_y[0];
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m_idx = 3;
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}
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}
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}
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}
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virtual void on_mouse_move(int x, int y, unsigned flags)
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{
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if(flags & agg::mouse_left)
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{
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if(m_idx == 3)
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{
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double dx = x - m_dx;
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double dy = y - m_dy;
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m_x[1] -= m_x[0] - dx;
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m_y[1] -= m_y[0] - dy;
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m_x[2] -= m_x[0] - dx;
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m_y[2] -= m_y[0] - dy;
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m_x[0] = dx;
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m_y[0] = dy;
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force_redraw();
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return;
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}
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if(m_idx >= 0)
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{
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m_x[m_idx] = x - m_dx;
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m_y[m_idx] = y - m_dy;
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force_redraw();
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}
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}
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else
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{
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on_mouse_button_up(x, y, flags);
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}
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}
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virtual void on_mouse_button_up(int x, int y, unsigned flags)
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{
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m_idx = -1;
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}
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virtual void on_key(int x, int y, unsigned key, unsigned flags)
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{
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double dx = 0;
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double dy = 0;
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switch(key)
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{
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case agg::key_left: dx = -0.1; break;
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case agg::key_right: dx = 0.1; break;
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case agg::key_up: dy = 0.1; break;
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case agg::key_down: dy = -0.1; break;
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}
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m_x[0] += dx;
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m_y[0] += dy;
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m_x[1] += dx;
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m_y[1] += dy;
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force_redraw();
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}
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};
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int agg_main(int argc, char* argv[])
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{
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the_application app(pix_format, flip_y);
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app.caption("AGG Example. Line Join");
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if(app.init(500, 330, 0))
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{
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return app.run();
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}
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return 1;
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}
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