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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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