1 files changed, 62 insertions, 0 deletions
diff --git a/sys/libfont/test.c b/sys/libfont/test.c
new file mode 100644
index 0000000..b92a56f
--- /dev/null
+++ b/sys/libfont/test.c
@@ -0,0 +1,62 @@
+#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;
+}