agg/examples/svg_viewer/svg_test.cpp

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2021-12-27 20:14:31 +01:00
#include <stdio.h>
#include <stdlib.h>
#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_scanline_p.h"
#include "agg_renderer_scanline.h"
#include "agg_pixfmt_rgba.h"
#include "platform/agg_platform_support.h"
#include "ctrl/agg_slider_ctrl.h"
#include "agg_svg_parser.h"
#define AGG_BGR24
#include "../pixel_formats.h"
enum { flip_y = false };
class the_application : public agg::platform_support
{
agg::svg::path_renderer m_path;
agg::slider_ctrl<color_type> m_expand;
agg::slider_ctrl<color_type> m_gamma;
agg::slider_ctrl<color_type> m_scale;
agg::slider_ctrl<color_type> m_rotate;
double m_min_x;
double m_min_y;
double m_max_x;
double m_max_y;
double m_x;
double m_y;
double m_dx;
double m_dy;
bool m_drag_flag;
public:
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_path(),
m_expand(5, 5, 256-5, 11, !flip_y),
m_gamma (5, 5+15, 256-5, 11+15, !flip_y),
m_scale (256+5, 5, 512-5, 11, !flip_y),
m_rotate(256+5, 5+15, 512-5, 11+15, !flip_y),
m_min_x(0.0),
m_min_y(0.0),
m_max_x(0.0),
m_max_y(0.0),
m_x(0.0),
m_y(0.0),
m_dx(0.0),
m_dy(0.0),
m_drag_flag(false)
{
add_ctrl(m_expand);
add_ctrl(m_gamma);
add_ctrl(m_scale);
add_ctrl(m_rotate);
m_expand.label("Expand=%3.2f");
m_expand.range(-1, 1.2);
m_expand.value(0.0);
m_gamma.label("Gamma=%3.2f");
m_gamma.range(0.0, 3.0);
m_gamma.value(1.0);
m_scale.label("Scale=%3.2f");
m_scale.range(0.2, 10.0);
m_scale.value(1.0);
m_rotate.label("Rotate=%3.2f");
m_rotate.range(-180.0, 180.0);
m_rotate.value(0.0);
}
void parse_svg(const char* fname)
{
agg::svg::parser p(m_path);
p.parse(fname);
m_path.bounding_rect(&m_min_x, &m_min_y, &m_max_x, &m_max_y);
caption(p.title());
}
virtual void on_resize(int cx, int cy)
{
}
virtual void on_draw()
{
typedef agg::pixfmt_bgra32 pixfmt;
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
pixfmt pixf(rbuf_window());
renderer_base rb(pixf);
renderer_solid ren(rb);
rb.clear(agg::rgba(1,1,1));
agg::rasterizer_scanline_aa<> ras;
agg::scanline_p8 sl;
agg::trans_affine mtx;
ras.gamma(agg::gamma_power(m_gamma.value()));
mtx *= agg::trans_affine_translation((m_min_x + m_max_x) * -0.5, (m_min_y + m_max_y) * -0.5);
mtx *= agg::trans_affine_scaling(m_scale.value());
mtx *= agg::trans_affine_rotation(agg::deg2rad(m_rotate.value()));
mtx *= agg::trans_affine_translation((m_min_x + m_max_x) * 0.5 + m_x, (m_min_y + m_max_y) * 0.5 + m_y + 30);
m_path.expand(m_expand.value());
start_timer();
m_path.render(ras, sl, ren, mtx, rb.clip_box(), 1.0);
double tm = elapsed_time();
unsigned vertex_count = m_path.vertex_count();
ras.gamma(agg::gamma_none());
agg::render_ctrl(ras, sl, rb, m_expand);
agg::render_ctrl(ras, sl, rb, m_gamma);
agg::render_ctrl(ras, sl, rb, m_scale);
agg::render_ctrl(ras, sl, rb, m_rotate);
char buf[128];
agg::gsv_text t;
t.size(10.0);
t.flip(true);
agg::conv_stroke<agg::gsv_text> pt(t);
pt.width(1.5);
sprintf(buf, "Vertices=%d Time=%.3f ms", vertex_count, tm);
t.start_point(10.0, 40.0);
t.text(buf);
ras.add_path(pt);
ren.color(agg::rgba(0,0,0));
agg::render_scanlines(ras, sl, ren);
//agg::gamma_lut<> gl(m_gamma.value());
//unsigned x, y;
//unsigned w = unsigned(width());
//unsigned h = unsigned(height());
//for(y = 0; y < h; y++)
//{
// for(x = 0; x < w; x++)
// {
// agg::rgba8 c = rb.pixel(x, y);
// c.r = gl.inv(c.r);
// c.g = gl.inv(c.g);
// c.b = gl.inv(c.b);
// rb.copy_pixel(x, y, c);
// }
//}
}
virtual void on_mouse_button_down(int x, int y, unsigned flags)
{
m_dx = x - m_x;
m_dy = y - m_y;
m_drag_flag = true;
}
virtual void on_mouse_move(int x, int y, unsigned flags)
{
if(flags == 0)
{
m_drag_flag = false;
}
if(m_drag_flag)
{
m_x = x - m_dx;
m_y = y - m_dy;
force_redraw();
}
}
virtual void on_mouse_button_up(int x, int y, unsigned flags)
{
m_drag_flag = false;
}
virtual void on_key(int x, int y, unsigned key, unsigned flags)
{
if(key == ' ')
{
agg::trans_affine mtx;
mtx *= agg::trans_affine_translation((m_min_x + m_max_x) * -0.5, (m_min_y + m_max_y) * -0.5);
mtx *= agg::trans_affine_scaling(m_scale.value());
mtx *= agg::trans_affine_rotation(agg::deg2rad(m_rotate.value()));
mtx *= agg::trans_affine_translation((m_min_x + m_max_x) * 0.5, (m_min_y + m_max_y) * 0.5);
mtx *= agg::trans_affine_translation(m_x, m_y);
double m[6];
mtx.store_to(m);
char buf[128];
sprintf(buf, "%3.3f, %3.3f, %3.3f, %3.3f, %3.3f, %3.3f",
m[0], m[1], m[2], m[3], m[4], m[5]);
message(buf);
FILE* fd = fopen(full_file_name("transform.txt"), "a");
fprintf(fd, "%s\n", buf);
fclose(fd);
}
}
};
int agg_main(int argc, char* argv[])
{
the_application app(agg::pix_format_bgra32, flip_y);
const char* fname = "tiger.svg";
if(argc <= 1)
{
FILE* fd = fopen(app.full_file_name(fname), "r");
if(fd == 0)
{
app.message("Usage: svg_test <svg_file>\n"
"Copy ../art/tiger.svg");
return 1;
}
fclose(fd);
}
else
{
fname = argv[1];
}
try
{
app.parse_svg(app.full_file_name(fname));
}
catch(agg::svg::exception& e)
{
app.message(e.msg());
return 1;
}
if(app.init(512, 600, agg::window_resize))
{
return app.run();
}
return 1;
}