[wasm] Add wasm-sample/

src/wasm-sample/Makefile

@@ -0,0 +1,18 @@
+all: test.wasm.ttf
+
+%.so: %.c ../hb-wasm-api.h
+	clang \
+		--target=wasm32-unknown-wasi \
+		-Wl,--no-entry \
+		-fvisibility=hidden \
+		-Wl,--allow-undefined \
+		-nostdlib \
+		-I .. \
+		$< \
+		-o $@
+
+%.wasm.ttf: %.ttf shape.so addTable.py
+	python addTable.py
+
+clean:
+	$(RM) test.wasm.ttf shape.so

src/wasm-sample/addTable.py

@@ -0,0 +1,11 @@
+from fontTools.ttLib import TTFont
+from fontTools.ttLib.tables.DefaultTable import DefaultTable
+
+font = TTFont("test.ttf")
+
+wasm_table = DefaultTable("Wasm")
+wasm_table.data = open("shape.so", "rb").read()
+
+font["Wasm"] = wasm_table
+
+font.save("test.wasm.ttf")

src/wasm-sample/shape.c

@@ -0,0 +1,25 @@
+#define HB_WASM_INTERFACE(ret_t, name) __attribute__((export_name(#name))) ret_t name
+
+#include <hb-wasm-api.h>
+
+void debugprint1 (char *s, int32_t);
+void debugprint2 (char *s, int32_t, int32_t);
+
+bool_t
+shape (font_t font, buffer_t buffer)
+{
+  face_t face = font_get_face (font);
+
+  blob_t blob = face_reference_table (face, TAG ('c','m','a','p'));
+
+  debugprint1 ("cmap length", blob.length);
+
+  buffer_contents_t contents = buffer_copy_contents (buffer);
+
+  debugprint1 ("buffer length", contents.length);
+
+  for (unsigned i = 0; i < contents.length; i++)
+    debugprint2 ("Codepoint", i, contents.info[i].codepoint);
+
+  return 1;
+}