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#include <u.h>
#include <libn.h>
#include <libfont.h>
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image_write.h"
#define W 512
#define H 128
#define L 64
static char *phrase = "the quick brown";
int
main()
{
int i, err;
float scale;
uchar *bitmap;
font·Info *info;
mmap·Reader fontfile;
int x, y, as, ds, lg, ax, lsb, off, kern, r[2], c0[2], c1[2];
err = 0;
fontfile = mmap·open("/home/nolln/root/data/DejaVuSans.ttf");
if (!fontfile.len) {
err = 1;
goto end;
}
info = font·make(fontfile.ubuf, 0);
if (!info)
panicf("failed to load info");
bitmap = calloc(W*H, sizeof(*bitmap));
scale = font·scaleheightto(info, L);
font·vmetrics(info, &as, &ds, &lg);
as *= scale;
ds *= scale;
x = 0;
for (i = 0; i < strlen(phrase); i++) {
font·code_hmetrics(info, phrase[i], &ax, &lsb);
font·code_bitmapbox(info, phrase[i], scale, scale, c0, c0+1, c1, c1+1);
y = as + c0[1];
off = x + lsb * scale + y * W;
font·code_fillbitmap(info, bitmap+off, c1[0]-c0[0], c1[1]-c0[1], W, scale, scale, phrase[i]);
x += ax * scale;
kern = font·code_kernadvance(info, phrase[i], phrase[i+1]);
x += kern * scale;
}
stbi_write_png("out.png", W, H, 1, bitmap, W);
font·free(info);
free(bitmap);
end:
mmap·close(fontfile);
return err;
}
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