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/* libnsfb ploygon plotter test program */
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <math.h>
#include "libnsfb.h"
#include "libnsfb_plot.h"
#include "libnsfb_event.h"
#define UNUSED(x) ((x) = (x))
int main(int argc, char **argv)
{
nsfb_t *nsfb;
nsfb_event_t event;
nsfb_bbox_t box;
uint8_t *fbptr;
int fbstride;
int sides;
int radius;
nsfb_point_t *points;
int loop;
nsfb_plot_pen_t pen;
UNUSED(argc);
UNUSED(argv);
nsfb = nsfb_init(NSFB_FRONTEND_SDL);
if (nsfb == NULL) {
fprintf(stderr, "Unable to initialise nsfb with SDL frontend\n");
return 1;
}
if (nsfb_init_frontend(nsfb) == -1) {
fprintf(stderr, "Unable to initialise nsfb frontend\n");
return 2;
}
/* get the geometry of the whole screen */
box.x0 = box.y0 = 0;
nsfb_get_geometry(nsfb, &box.x1, &box.y1, NULL);
nsfb_get_framebuffer(nsfb, &fbptr, &fbstride);
/* claim the whole screen for update */
nsfb_claim(nsfb, &box);
pen.stroke_colour = 0xff000000;
pen.stroke_type = NFSB_PLOT_OPTYPE_SOLID;
nsfb_plot_clg(nsfb, 0xffffffff);
radius = (box.y1 / 2);
for (sides = 14; sides >=6; sides-=2) {
points = malloc(sizeof(nsfb_point_t) * sides);
for (loop = 0; loop < sides;loop+=2) {
points[loop].x = (box.x1 / 2) +
(radius * cos(loop * 2 * M_PI / sides));
points[loop].y = (box.y1 / 2) +
(radius * sin(loop * 2 * M_PI / sides));
points[loop+1].x = (box.x1 / 2) +
((radius / 3) * cos((loop+1) * 2 * M_PI / sides));
points[loop+1].y = (box.y1 / 2) +
((radius / 3) * sin((loop+1) * 2 * M_PI / sides));
}
nsfb_plot_polygon(nsfb, (const int *)points, sides,
0xff000000 | (0xffffff / (sides * 2)));
nsfb_plot_polylines(nsfb, sides, points, &pen);
free(points);
radius -= 40;
}
nsfb_update(nsfb, &box);
while (event.type != NSFB_EVENT_CONTROL)
nsfb_event(nsfb, &event, -1);
return 0;
}
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