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🎉 Basic wasm fonts support

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Alejandro Alonso 2024-12-26 13:13:17 +01:00 • committed by AzazelN28
parent 6335a183ba
commit 751df46dc9
4 changed files with 67 additions and 1 deletions
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26
frontend/src/app/render_wasm/api.cljs
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@ -134,6 +134,32 @@
(aget buffer 3))))
shape-ids))
(defn- get-string-length [string] (+ (count string) 1))
;; IMPORTANT: It should be noted that only TTF fonts can be stored.
(defn- store-font
[family-name font-array-buffer]
(let [family-name-size (get-string-length family-name)
font-array-buffer-size (.-byteLength font-array-buffer)
size (+ font-array-buffer-size family-name-size)
ptr (h/call internal-module "_alloc_bytes" size)
family-name-ptr (+ ptr font-array-buffer-size)
heap (gobj/get ^js internal-module "HEAPU8")
mem (js/Uint8Array. (.-buffer heap) ptr size)]
(.set mem (js/Uint8Array. font-array-buffer))
(h/call internal-module "stringToUTF8" family-name family-name-ptr family-name-size)
(h/call internal-module "_store_font" family-name-size font-array-buffer-size)))
;; This doesn't work
#_(store-font-url "roboto-thin-italic" "https://fonts.gstatic.com/s/roboto/v32/KFOiCnqEu92Fr1Mu51QrEzAdLw.woff2")
;; This does
#_(store-font-url "sourcesanspro-regular" "http://localhost:3449/fonts/sourcesanspro-regular.ttf")
(defn- store-font-url
[family-name font-url]
(-> (p/then (js/fetch font-url)
(fn [response] (.arrayBuffer response)))
(p/then (fn [array-buffer] (store-font family-name array-buffer)))))
(defn- store-image
[id]
(let [buffer (uuid/get-u32 id)