agg/examples/rasterizers.cpp

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2021-12-27 20:14:31 +01:00
#include <math.h>
#include <stdio.h>
#include <time.h>
#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_rasterizer_outline.h"
#include "agg_scanline_p.h"
#include "agg_scanline_bin.h"
#include "agg_renderer_scanline.h"
#include "agg_renderer_primitives.h"
#include "ctrl/agg_slider_ctrl.h"
#include "ctrl/agg_cbox_ctrl.h"
#include "platform/agg_platform_support.h"
#define AGG_BGR24
//#define AGG_BGR96
#include "pixel_formats.h"
enum flip_y_e { flip_y = true };
class the_application : public agg::platform_support
{
double m_x[3];
double m_y[3];
double m_dx;
double m_dy;
int m_idx;
agg::slider_ctrl<color_type> m_gamma;
agg::slider_ctrl<color_type> m_alpha;
agg::cbox_ctrl<color_type> m_test;
agg::rasterizer_scanline_aa<> m_ras;
agg::scanline_p8 m_sl_p8;
agg::scanline_bin m_sl_bin;
public:
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_idx(-1),
m_gamma(130 + 10.0, 10.0 + 4.0, 130 + 150.0, 10.0 + 8.0 + 4.0, !flip_y),
m_alpha(130 + 150.0 + 10.0, 10.0 + 4.0, 500 - 10.0, 10.0 + 8.0 + 4.0, !flip_y),
m_test(130 + 10.0, 10.0 + 4.0 + 16.0, "Test Performance", !flip_y)
{
m_x[0] = 100 + 120; m_y[0] = 60;
m_x[1] = 369 + 120; m_y[1] = 170;
m_x[2] = 143 + 120; m_y[2] = 310;
add_ctrl(m_gamma);
m_gamma.range(0.0, 1.0);
m_gamma.value(0.5);
m_gamma.label("Gamma=%1.2f");
m_gamma.no_transform();
add_ctrl(m_alpha);
m_alpha.range(0.0, 1.0);
m_alpha.value(1.0);
m_alpha.label("Alpha=%1.2f");
m_alpha.no_transform();
add_ctrl(m_test);
m_test.no_transform();
}
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_aa;
typedef agg::renderer_scanline_bin_solid<renderer_base> renderer_bin;
void draw_anti_aliased()
{
pixfmt pixf(rbuf_window());
renderer_base rb(pixf);
renderer_aa ren_aa(rb);
agg::path_storage path;
path.move_to(m_x[0], m_y[0]);
path.line_to(m_x[1], m_y[1]);
path.line_to(m_x[2], m_y[2]);
path.close_polygon();
ren_aa.color(agg::rgba(0.7, 0.5, 0.1, m_alpha.value()));
m_ras.gamma(agg::gamma_power(m_gamma.value() * 2.0));
m_ras.add_path(path);
agg::render_scanlines(m_ras, m_sl_p8, ren_aa);
}
void draw_aliased()
{
pixfmt pixf(rbuf_window());
renderer_base rb(pixf);
renderer_bin ren_bin(rb);
agg::path_storage path;
path.move_to(m_x[0] - 200, m_y[0]);
path.line_to(m_x[1] - 200, m_y[1]);
path.line_to(m_x[2] - 200, m_y[2]);
path.close_polygon();
ren_bin.color(agg::rgba(0.1, 0.5, 0.7, m_alpha.value()));
m_ras.gamma(agg::gamma_threshold(m_gamma.value()));
m_ras.add_path(path);
agg::render_scanlines(m_ras, m_sl_bin, ren_bin);
//-- Drawing an outline with subpixel accuracy (aliased)
//typedef agg::renderer_primitives<renderer_base> renderer_pr;
//renderer_pr ren_pr(rb);
//agg::rasterizer_outline<renderer_pr> ras_line(ren_pr);
//ren_pr.line_color(agg::rgba(0.0, 0.0, 0.0));
//ras_line.add_path(path);
}
virtual void on_draw()
{
pixfmt pixf(rbuf_window());
renderer_base rb(pixf);
renderer_aa ren_aa(rb);
rb.clear(agg::rgba(1, 1, 1));
agg::rasterizer_scanline_aa<> ras_aa;
draw_anti_aliased();
draw_aliased();
agg::render_ctrl(ras_aa, m_sl_p8, rb, m_gamma);
agg::render_ctrl(ras_aa, m_sl_p8, rb, m_alpha);
agg::render_ctrl(ras_aa, m_sl_p8, rb, m_test);
}
virtual void on_mouse_button_down(int x, int y, unsigned flags)
{
if(flags & agg::mouse_left)
{
unsigned i;
for (i = 0; i < 3; i++)
{
if(sqrt( (x-m_x[i]) * (x-m_x[i]) + (y-m_y[i]) * (y-m_y[i]) ) < 20.0 ||
sqrt( (x-m_x[i]+200) * (x-m_x[i]+200) + (y-m_y[i]) * (y-m_y[i]) ) < 20)
{
m_dx = x - m_x[i];
m_dy = y - m_y[i];
m_idx = i;
break;
}
}
if(i == 3)
{
if(agg::point_in_triangle(m_x[0], m_y[0],
m_x[1], m_y[1],
m_x[2], m_y[2],
x, y) ||
agg::point_in_triangle(m_x[0] - 200, m_y[0],
m_x[1] - 200, m_y[1],
m_x[2] - 200, m_y[2],
x, y))
{
m_dx = x - m_x[0];
m_dy = y - m_y[0];
m_idx = 3;
}
}
}
}
virtual void on_mouse_move(int x, int y, unsigned flags)
{
if(flags & agg::mouse_left)
{
if(m_idx == 3)
{
double dx = x - m_dx;
double dy = y - m_dy;
m_x[1] -= m_x[0] - dx;
m_y[1] -= m_y[0] - dy;
m_x[2] -= m_x[0] - dx;
m_y[2] -= m_y[0] - dy;
m_x[0] = dx;
m_y[0] = dy;
force_redraw();
return;
}
if(m_idx >= 0)
{
m_x[m_idx] = x - m_dx;
m_y[m_idx] = y - m_dy;
force_redraw();
}
}
else
{
on_mouse_button_up(x, y, flags);
}
}
virtual void on_mouse_button_up(int x, int y, unsigned flags)
{
m_idx = -1;
}
virtual void on_ctrl_change()
{
if(m_test.status())
{
on_draw();
update_window();
m_test.status(false);
start_timer();
int i;
for(i = 0; i < 1000; i++)
{
draw_aliased();
}
double t1 = elapsed_time();
start_timer();
for(i = 0; i < 1000; i++)
{
draw_anti_aliased();
}
double t2 = elapsed_time();
update_window();
char buf[100];
sprintf(buf, "Time Aliased=%.2fms Time Anti-Aliased=%.2fms", t1, t2);
message(buf);
}
}
virtual void on_key(int x, int y, unsigned key, unsigned flags)
{
double dx = 0;
double dy = 0;
switch(key)
{
case agg::key_left: dx = -0.1; break;
case agg::key_right: dx = 0.1; break;
case agg::key_up: dy = 0.1; break;
case agg::key_down: dy = -0.1; break;
}
m_x[0] += dx;
m_y[0] += dy;
m_x[1] += dx;
m_y[1] += dy;
force_redraw();
}
};
int agg_main(int argc, char* argv[])
{
the_application app(pix_format, flip_y);
app.caption("AGG Example. Line Join");
if(app.init(500, 330, agg::window_resize))
{
return app.run();
}
return 1;
}