277 lines
7.5 KiB
C++
277 lines
7.5 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_p.h"
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#include "agg_renderer_scanline.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_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 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_join;
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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_miter_limit;
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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_join(10.0, 10.0, 133.0, 80.0, !flip_y),
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m_cap(10.0, 80.0 + 10.0, 133.0, 80.0 + 80.0, !flip_y),
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m_width(130 + 10.0, 10.0 + 4.0, 500.0 - 10.0, 10.0 + 8.0 + 4.0, !flip_y),
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m_miter_limit(130 + 10.0, 20.0 + 10.0 + 4.0, 500.0 - 10.0, 20.0 + 10.0 + 8.0 + 4.0, !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_join);
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m_join.text_size(7.5);
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m_join.text_thickness(1.0);
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m_join.add_item("Miter Join");
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m_join.add_item("Miter Join Revert");
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m_join.add_item("Round Join");
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m_join.add_item("Bevel Join");
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m_join.cur_item(2);
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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(2);
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add_ctrl(m_width);
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m_width.range(3.0, 40.0);
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m_width.value(20.0);
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m_width.label("Width=%1.2f");
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add_ctrl(m_miter_limit);
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m_miter_limit.range(1.0, 10.0);
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m_miter_limit.value(4.0);
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m_miter_limit.label("Miter Limit=%1.2f");
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m_join.no_transform();
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m_cap.no_transform();
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m_width.no_transform();
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m_miter_limit.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_p8 sl;
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agg::path_storage path;
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path.move_to(m_x[0], m_y[0]);
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path.line_to((m_x[0] + m_x[1]) / 2, (m_y[0] + m_y[1]) / 2); // This point is added only to check for numerical stability
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path.line_to(m_x[1], m_y[1]);
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path.line_to(m_x[2], m_y[2]);
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path.line_to(m_x[2], m_y[2]); // This point is added only to check for numerical stability
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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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path.close_polygon();
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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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agg::line_join_e join = agg::miter_join;
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if(m_join.cur_item() == 1) join = agg::miter_join_revert;
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if(m_join.cur_item() == 2) join = agg::round_join;
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if(m_join.cur_item() == 3) join = agg::bevel_join;
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// (1)
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agg::conv_stroke<agg::path_storage> stroke(path);
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stroke.line_join(join);
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stroke.line_cap(cap);
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stroke.miter_limit(m_miter_limit.value());
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stroke.width(m_width.value());
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ras.add_path(stroke);
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agg::render_scanlines_aa_solid(ras, sl, renb, agg::rgba(0.8, 0.7, 0.6));
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// (1)
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// (2)
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agg::conv_stroke<agg::path_storage> poly1(path);
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poly1.width(1.5);
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ras.add_path(poly1);
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agg::render_scanlines_aa_solid(ras, sl, renb, agg::rgba(0,0,0));
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// (2)
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// (3)
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agg::conv_dash<agg::conv_stroke<agg::path_storage> > poly2_dash(stroke);
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agg::conv_stroke<agg::conv_dash<agg::conv_stroke<agg::path_storage> > > poly2(poly2_dash);
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poly2.miter_limit(4.0);
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poly2.width(m_width.value() / 5.0);
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poly2.line_cap(cap);
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poly2.line_join(join);
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poly2_dash.add_dash(20.0, m_width.value() / 2.5);
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ras.add_path(poly2);
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agg::render_scanlines_aa_solid(ras, sl, renb, agg::rgba(0,0,0.3));
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// (3)
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// (4)
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ras.add_path(path);
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agg::render_scanlines_aa_solid(ras, sl, renb, agg::rgba(0.0, 0.0, 0.0, 0.2));
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// (4)
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agg::render_ctrl(ras, sl, renb, m_join);
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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_miter_limit);
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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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