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font: web canvas shaper yields runs

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This commit is contained in:
Mitchell Hashimoto
2022-12-07 18:29:49 -08:00
parent dd71456f35
commit f53d9fb704
2 changed files with 89 additions and 6 deletions
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24
example/app.ts
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@@ -46,6 +46,9 @@ fetch(url.href).then(response =>
atlas_new,
atlas_free,
atlas_debug_canvas,
shaper_new,
shaper_free,
shaper_test,
} = results.instance.exports;
// Give us access to the zjs value for debugging.
globalThis.zjs = zjs;
@@ -54,13 +57,19 @@ fetch(url.href).then(response =>
// Initialize our zig-js memory
zjs.memory = memory;
// Helpers
const makeStr = (str) => {
const utf8 = new TextEncoder().encode(str);
const ptr = malloc(utf8.byteLength);
new Uint8Array(memory.buffer, ptr).set(utf8);
return { ptr: ptr, len: utf8.byteLength };
};
// Create our atlas
// const atlas = atlas_new(512, 0 /* greyscale */);
// Create some memory for our string
const font = new TextEncoder().encode("monospace");
const font_ptr = malloc(font.byteLength);
new Uint8Array(memory.buffer, font_ptr).set(font);
const font_name = makeStr("monospace");
// Initialize our deferred face
// const df = deferred_face_new(font_ptr, font.byteLength, 0 /* text */);
@@ -73,8 +82,8 @@ fetch(url.href).then(response =>
// Create our group
const group = group_new(72 /* size */);
group_add_face(group, 0 /* regular */, deferred_face_new(font_ptr, font.byteLength, 0 /* text */));
group_add_face(group, 0 /* regular */, deferred_face_new(font_ptr, font.byteLength, 1 /* emoji */));
group_add_face(group, 0 /* regular */, deferred_face_new(font_name.ptr, font_name.len, 0 /* text */));
group_add_face(group, 0 /* regular */, deferred_face_new(font_name.ptr, font_name.len, 1 /* emoji */));
// Create our group cache
const group_cache = group_cache_new(group);
@@ -112,5 +121,10 @@ fetch(url.href).then(response =>
document.getElementById("atlas-color-canvas").append(zjs.deleteValue(id));
}
// Let's try shaping
const shaper = shaper_new(120);
const input = makeStr("hello");
shaper_test(shaper, group_cache, input.ptr, input.len);
//face_free(face);
});