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+/*
+ * 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_FONT_HH
+#define HB_WASM_API_FONT_HH
+
+#include "hb-wasm-api.hh"
+
+#include "hb-outline.hh"
+
+namespace hb {
+namespace wasm {
+
+
+HB_WASM_API (ptr_t(font_t), font_create) (HB_WASM_EXEC_ENV
+ ptr_d(face_t, face))
+{
+ HB_REF2OBJ (face);
+
+ hb_font_t *font = hb_font_create (face);
+
+ HB_OBJ2REF (font);
+ return fontref;
+}
+
+HB_WASM_API (ptr_t(face_t), font_get_face) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font))
+{
+ HB_REF2OBJ (font);
+
+ hb_face_t *face = hb_font_get_face (font);
+
+ HB_OBJ2REF (face);
+ return faceref;
+}
+
+HB_WASM_API (void, font_get_scale) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ ptr_d(int32_t, x_scale),
+ ptr_d(int32_t, y_scale))
+{
+ HB_REF2OBJ (font);
+
+ HB_PTR_PARAM(int32_t, x_scale);
+ HB_PTR_PARAM(int32_t, y_scale);
+
+ hb_font_get_scale (font, x_scale, y_scale);
+}
+
+HB_WASM_API (codepoint_t, font_get_glyph) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ codepoint_t unicode,
+ codepoint_t variation_selector)
+{
+ HB_REF2OBJ (font);
+ codepoint_t glyph;
+
+ hb_font_get_glyph (font, unicode, variation_selector, &glyph);
+ return glyph;
+}
+
+HB_WASM_API (position_t, font_get_glyph_h_advance) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ codepoint_t glyph)
+{
+ HB_REF2OBJ (font);
+ return hb_font_get_glyph_h_advance (font, glyph);
+}
+
+HB_WASM_API (position_t, font_get_glyph_v_advance) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ codepoint_t glyph)
+{
+ HB_REF2OBJ (font);
+ return hb_font_get_glyph_v_advance (font, glyph);
+}
+
+static_assert (sizeof (glyph_extents_t) == sizeof (hb_glyph_extents_t), "");
+
+HB_WASM_API (bool_t, font_get_glyph_extents) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ codepoint_t glyph,
+ ptr_d(glyph_extents_t, extents))
+{
+ HB_REF2OBJ (font);
+ HB_PTR_PARAM (glyph_extents_t, extents);
+ if (unlikely (!extents))
+ return false;
+
+ return hb_font_get_glyph_extents (font, glyph,
+ (hb_glyph_extents_t *) extents);
+}
+
+HB_WASM_API (void, font_glyph_to_string) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ codepoint_t glyph,
+ char *s, uint32_t size)
+{
+ HB_REF2OBJ (font);
+
+ hb_font_glyph_to_string (font, glyph, s, size);
+}
+
+static_assert (sizeof (glyph_outline_point_t) == sizeof (hb_outline_point_t), "");
+static_assert (sizeof (uint32_t) == sizeof (hb_outline_t::contours[0]), "");
+
+HB_WASM_API (bool_t, font_copy_glyph_outline) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ codepoint_t glyph,
+ ptr_d(glyph_outline_t, outline))
+{
+ HB_REF2OBJ (font);
+ HB_PTR_PARAM (glyph_outline_t, outline);
+ if (unlikely (!outline))
+ return false;
+
+ hb_outline_t hb_outline;
+ auto *funcs = hb_outline_recording_pen_get_funcs ();
+
+ hb_font_draw_glyph (font, glyph, funcs, &hb_outline);
+
+ if (unlikely (hb_outline.points.in_error () ||
+ hb_outline.contours.in_error ()))
+ {
+ outline->n_points = outline->n_contours = 0;
+ return false;
+ }
+
+ // TODO Check two buffers separately
+ if (hb_outline.points.length <= outline->n_points &&
+ hb_outline.contours.length <= outline->n_contours)
+ {
+ glyph_outline_point_t *points = HB_ARRAY_APP2NATIVE (glyph_outline_point_t, outline->points, hb_outline.points.length);
+ uint32_t *contours = HB_ARRAY_APP2NATIVE (uint32_t, outline->contours, hb_outline.contours.length);
+
+ if (unlikely (!points || !contours))
+ {
+ outline->n_points = outline->n_contours = 0;
+ return false;
+ }
+
+ hb_memcpy (points, hb_outline.points.arrayZ, hb_outline.points.get_size ());
+ hb_memcpy (contours, hb_outline.contours.arrayZ, hb_outline.contours.get_size ());
+
+ return true;
+ }
+
+ outline->n_points = hb_outline.points.length;
+ outline->points = wasm_runtime_module_dup_data (module_inst,
+ (const char *) hb_outline.points.arrayZ,
+ hb_outline.points.get_size ());
+ outline->n_contours = hb_outline.contours.length;
+ outline->contours = wasm_runtime_module_dup_data (module_inst,
+ (const char *) hb_outline.contours.arrayZ,
+ hb_outline.contours.get_size ());
+
+ if ((outline->n_points && !outline->points) ||
+ (!outline->n_contours && !outline->contours))
+ {
+ outline->n_points = outline->n_contours = 0;
+ return false;
+ }
+
+ return true;
+}
+
+HB_WASM_API (void, glyph_outline_free) (HB_WASM_EXEC_ENV
+ ptr_d(glyph_outline_t, outline))
+{
+ HB_PTR_PARAM (glyph_outline_t, outline);
+ if (unlikely (!outline))
+ return;
+
+ module_free (outline->points);
+ module_free (outline->contours);
+
+ outline->n_points = 0;
+ outline->points = nullref;
+ outline->n_contours = 0;
+ outline->contours = nullref;
+}
+
+HB_WASM_API (bool_t, font_copy_coords) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ ptr_d(coords_t, coords))
+{
+ HB_REF2OBJ (font);
+ HB_PTR_PARAM (coords_t, coords);
+ if (unlikely (!coords))
+ return false;
+
+ unsigned our_length;
+ const int* our_coords = hb_font_get_var_coords_normalized(font, &our_length);
+
+ if (our_length <= coords->length) {
+ int *their_coords = HB_ARRAY_APP2NATIVE (int, coords->coords, our_length);
+ if (unlikely(!their_coords)) {
+ coords->length = 0;
+ return false;
+ }
+ unsigned bytes = our_length * sizeof (int);
+ hb_memcpy (their_coords, our_coords, bytes);
+
+ return true;
+ }
+
+ module_free (coords->coords);
+ coords->length = our_length;
+ unsigned bytes = our_length * sizeof (int);
+ coords->coords = wasm_runtime_module_dup_data (module_inst, (const char *) our_coords, bytes);
+ if (our_length && !coords->coords)
+ {
+ coords->length = 0;
+ return false;
+ }
+
+ return true;
+}
+
+HB_WASM_API (bool_t, font_set_coords) (HB_WASM_EXEC_ENV
+ ptr_d(font_t, font),
+ ptr_d(coords_t, coords))
+{
+ HB_REF2OBJ (font);
+ HB_PTR_PARAM (coords_t, coords);
+ if (unlikely (!coords))
+ return false;
+
+ unsigned length = coords->length;
+ unsigned bytes;
+ if (unlikely (hb_unsigned_mul_overflows (length, sizeof (int), &bytes)))
+ return false;
+
+ const int *our_coords = (const int *) (validate_app_addr (coords->coords, bytes) ? addr_app_to_native (coords->coords) : nullptr);
+ hb_font_set_var_coords_normalized(font, our_coords, length);
+ return true;
+}
+
+
+}}
+
+#endif /* HB_WASM_API_FONT_HH */
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