kc3-lang/harfbuzz/src/hb-wasm-api-font.hh

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• Hash : 1fc128f6
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  Date : 2023-06-26T18:34:27
  

  Replace a few memset/memcpy's with hb_ equivalents
  

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• src/hb-wasm-api-font.hh

• /*
   * 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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