[wasm-api] Bind shape_with

src/hb-wasm-api-list.hh

@@ -73,6 +73,9 @@ static NativeSymbol _hb_wasm_native_symbols[] =
   NATIVE_SYMBOL ("(ii)i",	font_get_glyph_h_advance),
   NATIVE_SYMBOL ("(ii)i",	font_get_glyph_v_advance),
 
+  /* shape */
+  NATIVE_SYMBOL ("(ii$)i",	shape_with),
+
   /* debug */
 #ifdef HB_DEBUG_WASM
   NATIVE_SYMBOL ("($)",		debugprint),

src/hb-wasm-api-shape.hh

@@ -0,0 +1,50 @@
+/*
+ * Copyright © 2023  Behdad Esfahbod
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ */
+
+#ifndef HB_WASM_API_SHAPE_HH
+#define HB_WASM_API_SHAPE_HH
+
+#include "hb-wasm-api.hh"
+
+namespace hb {
+namespace wasm {
+
+
+bool_t
+shape_with (HB_WASM_EXEC_ENV
+	    ptr_t(font_t) fontref,
+	    ptr_t(buffer_t) bufferref,
+	    const char *shaper)
+{
+  HB_REF2OBJ (font);
+  HB_REF2OBJ (buffer);
+
+  const char * shaper_list[] = {shaper, nullptr};
+  return hb_shape_full (font, buffer, nullptr, 0, shaper_list);
+}
+
+
+}}
+
+#endif /* HB_WASM_API_SHAPE_HH */

src/hb-wasm-api.cc

@@ -31,6 +31,7 @@
 #include "hb-wasm-api-buffer.hh"
 #include "hb-wasm-api-face.hh"
 #include "hb-wasm-api-font.hh"
+#include "hb-wasm-api-shape.hh"
 
 
 #undef module_inst

src/hb-wasm-api.h

@@ -189,6 +189,14 @@ HB_WASM_API (hb_position_t, font_get_glyph_v_advance) (HB_WASM_EXEC_ENV
 						       hb_codepoint_t glyph);
 
 
+/* shape */
+
+HB_WASM_INTERFACE (bool_t, shape_with) (HB_WASM_EXEC_ENV
+				        ptr_t(font_t),
+				        ptr_t(buffer_t),
+					const char *shaper);
+
+
 /* shape interface */
 
 HB_WASM_INTERFACE (bool_t, shape) (HB_WASM_EXEC_ENV

src/meson.build

@@ -331,6 +331,7 @@ hb_wasm_sources = files(
   'hb-wasm-api-buffer.hh',
   'hb-wasm-api-face.hh',
   'hb-wasm-api-font.hh',
+  'hb-wasm-api-shape.hh',
   'hb-wasm-shape.cc',
 )
 hb_wasm_headers = files()

src/wasm-sample/Makefile

@@ -1,6 +1,6 @@
-all: test.wasm.ttf
+all: test-fallback.wasm.ttf test-ot.wasm.ttf
 
-%.so: %.c ../hb-wasm-api.h
+%.wasm: %.cc ../hb-wasm-api.h
 	clang \
 		--target=wasm32-unknown-wasi \
 		-Wl,--no-entry \
@@ -11,10 +11,13 @@ all: test.wasm.ttf
 		$< \
 		-o $@
 
-%.wasm.ttf: %.ttf shape.so addTable.py
-	python addTable.py $< $@ shape.so
+test-fallback.wasm.ttf: test.ttf shape-fallback.wasm addTable.py
+	python addTable.py $< $@ shape-fallback.wasm
+
+test-ot.wasm.ttf: test.ttf shape-ot.wasm addTable.py
+	python addTable.py $< $@ shape-ot.wasm
 
 clean:
-	$(RM) test.wasm.ttf shape.so
+	$(RM) test-fallback.wasm.ttf test-ot.wasm.ttf shape-fallback.wasm shape-ot.wasm
 
-.PRECIOUS: shape.so
+.PRECIOUS: *.wasm

src/wasm-sample/shape-fallback.cc

@@ -2,8 +2,10 @@
 
 #include <hb-wasm-api.h>
 
-void debugprint1 (char *s, int32_t);
-void debugprint2 (char *s, int32_t, int32_t);
+extern "C" {
+void debugprint1 (const char *s, int32_t);
+void debugprint2 (const char *s, int32_t, int32_t);
+}
 
 bool_t
 shape (font_t *font, buffer_t *buffer)

src/wasm-sample/shape-ot.cc

@@ -0,0 +1,14 @@
+#define HB_WASM_INTERFACE(ret_t, name) __attribute__((export_name(#name))) ret_t name
+
+#include <hb-wasm-api.h>
+
+extern "C" {
+void debugprint1 (const char *s, int32_t);
+void debugprint2 (const char *s, int32_t, int32_t);
+}
+
+bool_t
+shape (font_t *font, buffer_t *buffer)
+{
+  return shape_with (font, buffer, "ot");
+}