237 lines
5.7 KiB
C++
237 lines
5.7 KiB
C++
/*
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* Copyright © 2011 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#define HB_DEBUG_WASM 1
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#include "hb-shaper-impl.hh"
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#ifdef HAVE_WASM
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#include "hb-wasm-api.hh"
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/*
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* shaper face data
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*/
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#define HB_WASM_TAG_WASM HB_TAG('W','a','s','m')
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struct hb_wasm_face_data_t {
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hb_blob_t *wasm_blob;
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wasm_module_t wasm_module;
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};
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static bool
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init_wasm ()
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{
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static bool initialized;
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if (initialized)
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return true;
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RuntimeInitArgs init_args;
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memset (&init_args, 0, sizeof (RuntimeInitArgs));
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init_args.mem_alloc_type = Alloc_With_Allocator;
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init_args.mem_alloc_option.allocator.malloc_func = (void *) hb_malloc;
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init_args.mem_alloc_option.allocator.realloc_func = (void *) hb_realloc;
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init_args.mem_alloc_option.allocator.free_func = (void *) hb_free;
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init_args.mem_alloc_type = Alloc_With_System_Allocator;
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// Native symbols need below registration phase
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init_args.n_native_symbols = ARRAY_LENGTH (_hb_wasm_native_symbols);
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init_args.native_module_name = "env";
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init_args.native_symbols = _hb_wasm_native_symbols;
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if (!wasm_runtime_full_init (&init_args))
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{
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DEBUG_MSG (WASM, nullptr, "Init runtime environment failed.");
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return false;
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}
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initialized = true;
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return true;
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}
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hb_wasm_face_data_t *
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_hb_wasm_shaper_face_data_create (hb_face_t *face)
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{
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hb_wasm_face_data_t *data = nullptr;
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hb_blob_t *wasm_blob = nullptr;
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wasm_module_t wasm_module = nullptr;
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wasm_blob = hb_face_reference_table (face, HB_WASM_TAG_WASM);
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unsigned length = hb_blob_get_length (wasm_blob);
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if (!length)
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goto fail;
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if (!init_wasm ())
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goto fail;
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wasm_module = wasm_runtime_load ((uint8_t *) hb_blob_get_data_writable (wasm_blob, nullptr),
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length, nullptr, 0);
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if (!wasm_module)
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{
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DEBUG_MSG (WASM, nullptr, "Load wasm module failed.");
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goto fail;
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}
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data = (hb_wasm_face_data_t *) hb_calloc (1, sizeof (hb_wasm_face_data_t));
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if (unlikely (!data))
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goto fail;
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data->wasm_blob = wasm_blob;
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data->wasm_module = wasm_module;
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return data;
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fail:
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if (wasm_module)
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wasm_runtime_unload (wasm_module);
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hb_blob_destroy (wasm_blob);
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hb_free (data);
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return nullptr;
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}
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void
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_hb_wasm_shaper_face_data_destroy (hb_wasm_face_data_t *data)
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{
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wasm_runtime_unload (data->wasm_module);
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hb_blob_destroy (data->wasm_blob);
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hb_free (data);
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}
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/*
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* shaper font data
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*/
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struct hb_wasm_font_data_t {};
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hb_wasm_font_data_t *
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_hb_wasm_shaper_font_data_create (hb_font_t *font HB_UNUSED)
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{
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return (hb_wasm_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
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}
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void
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_hb_wasm_shaper_font_data_destroy (hb_wasm_font_data_t *data HB_UNUSED)
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{
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}
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/*
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* shaper
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*/
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hb_bool_t
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_hb_wasm_shape (hb_shape_plan_t *shape_plan,
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hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features,
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unsigned int num_features)
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{
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bool ret = true;
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const hb_wasm_face_data_t *face_data = font->face->data.wasm;
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constexpr uint32_t stack_size = 8092, heap_size = 8092;
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wasm_module_inst_t module_inst = nullptr;
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wasm_exec_env_t exec_env = nullptr;
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wasm_function_inst_t shape_func = nullptr;
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module_inst = wasm_runtime_instantiate(face_data->wasm_module,
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stack_size, heap_size,
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nullptr, 0);
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if (!module_inst)
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{
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DEBUG_MSG (WASM, face_data->wasm_module, "Instantiate wasm module failed.");
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goto fail;
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}
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exec_env = wasm_runtime_create_exec_env (module_inst, stack_size);
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if (!exec_env) {
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DEBUG_MSG (WASM, module_inst, "Create wasm execution environment failed.");
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goto fail;
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}
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if (!(shape_func = wasm_runtime_lookup_function (module_inst, "shape", nullptr)))
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{
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DEBUG_MSG (WASM, module_inst, "Shape function not found.");
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goto fail;
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}
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uint32_t font_ref;
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uint32_t buffer_ref;
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// cmake -DWAMR_BUILD_REF_TYPES=1 for these to work
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if (!wasm_externref_obj2ref (module_inst, font, &font_ref) ||
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!wasm_externref_obj2ref (module_inst, buffer, &buffer_ref))
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{
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DEBUG_MSG (WASM, module_inst, "Failed to register objects.");
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goto fail;
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}
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wasm_val_t results[1];
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wasm_val_t arguments[2];
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results[0].kind = WASM_I32;
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arguments[0].kind = WASM_I32;
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arguments[0].of.i32 = font_ref;
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arguments[1].kind = WASM_I32;
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arguments[1].of.i32 = buffer_ref;
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if (!wasm_runtime_call_wasm_a (exec_env, shape_func,
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ARRAY_LENGTH (results), results,
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ARRAY_LENGTH (arguments), arguments))
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{
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DEBUG_MSG (WASM, module_inst, "Calling shape function failed: %s",
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wasm_runtime_get_exception(module_inst));
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goto fail;
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}
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printf ("%i\n", results[0].of.i32);
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if (!face_data)
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goto fail;
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if (0)
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{
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fail:
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ret = false;
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}
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if (exec_env)
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wasm_runtime_destroy_exec_env (exec_env);
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if (module_inst)
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wasm_runtime_deinstantiate (module_inst);
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return ret;
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}
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#endif
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