Re-implement callbacks in JS

.github/workflows/build.yml

@@ -7,7 +7,7 @@ on:
     branches: [ "main" ]
 
 env:
-  EM_VERSION: 3.1.16
+  EM_VERSION: 3.1.56
   EM_CACHE_FOLDER: 'emsdk-cache'
 
 jobs:
@@ -28,7 +28,7 @@ jobs:
           path: ${{env.EM_CACHE_FOLDER}}
           key: ${{env.EM_VERSION}}-${{runner.os}}
       - name: Setup Emscripten
-        uses: mymindstorm/setup-emsdk@v11
+        uses: mymindstorm/setup-emsdk@v14
         with:
           version: ${{env.EM_VERSION}}
           actions-cache-folder: ${{env.EM_CACHE_FOLDER}}

.gitignore

@@ -1,2 +1,3 @@
 *.wasm
+hb.js
 .DS_Store

build.sh

@@ -15,7 +15,11 @@ em++ \
 	-DHB_CONFIG_OVERRIDE_H=\"config-override.h\" \
 	-DHB_EXPERIMENTAL_API \
 	--no-entry \
-	-s EXPORTED_FUNCTIONS=@hbjs.symbols \
+	-s MODULARIZE \
+	-s EXPORTED_FUNCTIONS=@hb.symbols \
+	-s EXPORTED_RUNTIME_METHODS='["addFunction", "wasmMemory", "wasmExports"]' \
 	-s INITIAL_MEMORY=65MB \
-	-o hb.wasm \
-	hbjs.cc
+	-s ALLOW_TABLE_GROWTH \
+	-lexports.js \
+	-o hb.js \
+	harfbuzz/src/harfbuzz.cc

hbjs.symbols → hb.symbols

@@ -9,12 +9,15 @@ _hb_buffer_destroy
 _hb_buffer_get_glyph_infos
 _hb_buffer_get_glyph_positions
 _hb_buffer_get_length
+_hb_buffer_get_content_type
 _hb_buffer_guess_segment_properties
 _hb_buffer_set_cluster_level
 _hb_buffer_set_direction
 _hb_buffer_set_flags
 _hb_buffer_set_language
 _hb_buffer_set_script
+_hb_buffer_set_message_func
+_hb_buffer_serialize_glyphs
 _hb_face_create
 _hb_face_collect_unicodes
 _hb_face_destroy
@@ -25,17 +28,22 @@ _hb_font_destroy
 _hb_font_glyph_to_string
 _hb_font_set_scale
 _hb_font_set_variations
+_hb_font_draw_glyph
+_hb_draw_funcs_create
+_hb_draw_funcs_set_move_to_func
+_hb_draw_funcs_set_line_to_func
+_hb_draw_funcs_set_quadratic_to_func
+_hb_draw_funcs_set_cubic_to_func
+_hb_draw_funcs_set_close_path_func
 _hb_glyph_info_get_glyph_flags
 _hb_language_from_string
 _hb_ot_var_get_axis_infos
 _hb_script_from_string
+_hb_feature_from_string
 _hb_set_create
 _hb_set_destroy
 _hb_set_get_population
 _hb_set_next_many
 _hb_shape
-_hbjs_glyph_svg
-_hbjs_shape_with_trace
 _malloc
 _free
-_free_ptr