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render: more precise calculation for undercurl

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kraftwerk28 2022-06-27 18:52:13 +03:00
parent 44ae8752f1
commit e6d3c0100c
1 changed files with 9 additions and 3 deletions
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12
render.c
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@ -4,6 +4,7 @@
#include <wctype.h>
#include <unistd.h>
#include <signal.h>
#include <math.h>
#include <sys/ioctl.h>
#include <sys/time.h>
@ -443,11 +444,16 @@ draw_ext_underline(const struct terminal *term, pixman_image_t *pix,
break;
}
case UNDERLINE_CURLY: {
#define I(x) pixman_int_to_fixed(x)
const int top = y + y_ofs;
const int bot = top + thickness * 3;
const int th = thickness;
const int half_x = x + ceil_w / 2, full_x = x + ceil_w;
const int half_x = x + ceil_w / 2.0, full_x = x + ceil_w;
const double bt_2 = (bot - top) * (bot - top);
const double th_2 = thickness * thickness;
const double hx_2 = ceil_w * ceil_w / 4.0;
const int th = round(sqrt(th_2 + (th_2 * bt_2 / hx_2)) / 2.);
#define I(x) pixman_int_to_fixed(x)
const pixman_trapezoid_t traps[] = {
{
I(top), I(bot),