michael@0: /*
michael@0:  * Copyright © 2009  Red Hat, Inc.
michael@0:  * Copyright © 2012  Google, Inc.
michael@0:  *
michael@0:  *  This is part of HarfBuzz, a text shaping library.
michael@0:  *
michael@0:  * Permission is hereby granted, without written agreement and without
michael@0:  * license or royalty fees, to use, copy, modify, and distribute this
michael@0:  * software and its documentation for any purpose, provided that the
michael@0:  * above copyright notice and the following two paragraphs appear in
michael@0:  * all copies of this software.
michael@0:  *
michael@0:  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
michael@0:  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
michael@0:  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
michael@0:  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
michael@0:  * DAMAGE.
michael@0:  *
michael@0:  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
michael@0:  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0:  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
michael@0:  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
michael@0:  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
michael@0:  *
michael@0:  * Red Hat Author(s): Behdad Esfahbod
michael@0:  * Google Author(s): Behdad Esfahbod
michael@0:  */
michael@0: 
michael@0: #include "hb-private.hh"
michael@0: 
michael@0: #include "hb-ot-layout-private.hh"
michael@0: 
michael@0: #include "hb-font-private.hh"
michael@0: #include "hb-open-file-private.hh"
michael@0: #include "hb-ot-head-table.hh"
michael@0: #include "hb-ot-maxp-table.hh"
michael@0: 
michael@0: #include "hb-cache-private.hh"
michael@0: 
michael@0: #include <string.h>
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * hb_font_funcs_t
michael@0:  */
michael@0: 
michael@0: static hb_bool_t
michael@0: hb_font_get_glyph_nil (hb_font_t *font,
michael@0: 		       void *font_data HB_UNUSED,
michael@0: 		       hb_codepoint_t unicode,
michael@0: 		       hb_codepoint_t variation_selector,
michael@0: 		       hb_codepoint_t *glyph,
michael@0: 		       void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent)
michael@0:     return font->parent->get_glyph (unicode, variation_selector, glyph);
michael@0: 
michael@0:   *glyph = 0;
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: static hb_position_t
michael@0: hb_font_get_glyph_h_advance_nil (hb_font_t *font,
michael@0: 				 void *font_data HB_UNUSED,
michael@0: 				 hb_codepoint_t glyph,
michael@0: 				 void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent)
michael@0:     return font->parent_scale_x_distance (font->parent->get_glyph_h_advance (glyph));
michael@0: 
michael@0:   return font->x_scale;
michael@0: }
michael@0: 
michael@0: static hb_position_t
michael@0: hb_font_get_glyph_v_advance_nil (hb_font_t *font,
michael@0: 				 void *font_data HB_UNUSED,
michael@0: 				 hb_codepoint_t glyph,
michael@0: 				 void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent)
michael@0:     return font->parent_scale_y_distance (font->parent->get_glyph_v_advance (glyph));
michael@0: 
michael@0:   return font->y_scale;
michael@0: }
michael@0: 
michael@0: static hb_bool_t
michael@0: hb_font_get_glyph_h_origin_nil (hb_font_t *font,
michael@0: 				void *font_data HB_UNUSED,
michael@0: 				hb_codepoint_t glyph,
michael@0: 				hb_position_t *x,
michael@0: 				hb_position_t *y,
michael@0: 				void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent) {
michael@0:     hb_bool_t ret = font->parent->get_glyph_h_origin (glyph, x, y);
michael@0:     if (ret)
michael@0:       font->parent_scale_position (x, y);
michael@0:     return ret;
michael@0:   }
michael@0: 
michael@0:   *x = *y = 0;
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: static hb_bool_t
michael@0: hb_font_get_glyph_v_origin_nil (hb_font_t *font,
michael@0: 				void *font_data HB_UNUSED,
michael@0: 				hb_codepoint_t glyph,
michael@0: 				hb_position_t *x,
michael@0: 				hb_position_t *y,
michael@0: 				void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent) {
michael@0:     hb_bool_t ret = font->parent->get_glyph_v_origin (glyph, x, y);
michael@0:     if (ret)
michael@0:       font->parent_scale_position (x, y);
michael@0:     return ret;
michael@0:   }
michael@0: 
michael@0:   *x = *y = 0;
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: static hb_position_t
michael@0: hb_font_get_glyph_h_kerning_nil (hb_font_t *font,
michael@0: 				 void *font_data HB_UNUSED,
michael@0: 				 hb_codepoint_t left_glyph,
michael@0: 				 hb_codepoint_t right_glyph,
michael@0: 				 void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent)
michael@0:     return font->parent_scale_x_distance (font->parent->get_glyph_h_kerning (left_glyph, right_glyph));
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: static hb_position_t
michael@0: hb_font_get_glyph_v_kerning_nil (hb_font_t *font,
michael@0: 				 void *font_data HB_UNUSED,
michael@0: 				 hb_codepoint_t top_glyph,
michael@0: 				 hb_codepoint_t bottom_glyph,
michael@0: 				 void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent)
michael@0:     return font->parent_scale_y_distance (font->parent->get_glyph_v_kerning (top_glyph, bottom_glyph));
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: static hb_bool_t
michael@0: hb_font_get_glyph_extents_nil (hb_font_t *font,
michael@0: 			       void *font_data HB_UNUSED,
michael@0: 			       hb_codepoint_t glyph,
michael@0: 			       hb_glyph_extents_t *extents,
michael@0: 			       void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent) {
michael@0:     hb_bool_t ret = font->parent->get_glyph_extents (glyph, extents);
michael@0:     if (ret) {
michael@0:       font->parent_scale_position (&extents->x_bearing, &extents->y_bearing);
michael@0:       font->parent_scale_distance (&extents->width, &extents->height);
michael@0:     }
michael@0:     return ret;
michael@0:   }
michael@0: 
michael@0:   memset (extents, 0, sizeof (*extents));
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: static hb_bool_t
michael@0: hb_font_get_glyph_contour_point_nil (hb_font_t *font,
michael@0: 				     void *font_data HB_UNUSED,
michael@0: 				     hb_codepoint_t glyph,
michael@0: 				     unsigned int point_index,
michael@0: 				     hb_position_t *x,
michael@0: 				     hb_position_t *y,
michael@0: 				     void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent) {
michael@0:     hb_bool_t ret = font->parent->get_glyph_contour_point (glyph, point_index, x, y);
michael@0:     if (ret)
michael@0:       font->parent_scale_position (x, y);
michael@0:     return ret;
michael@0:   }
michael@0: 
michael@0:   *x = *y = 0;
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: static hb_bool_t
michael@0: hb_font_get_glyph_name_nil (hb_font_t *font,
michael@0: 			    void *font_data HB_UNUSED,
michael@0: 			    hb_codepoint_t glyph,
michael@0: 			    char *name, unsigned int size,
michael@0: 			    void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent)
michael@0:     return font->parent->get_glyph_name (glyph, name, size);
michael@0: 
michael@0:   if (size) *name = '\0';
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: static hb_bool_t
michael@0: hb_font_get_glyph_from_name_nil (hb_font_t *font,
michael@0: 				 void *font_data HB_UNUSED,
michael@0: 				 const char *name, int len, /* -1 means nul-terminated */
michael@0: 				 hb_codepoint_t *glyph,
michael@0: 				 void *user_data HB_UNUSED)
michael@0: {
michael@0:   if (font->parent)
michael@0:     return font->parent->get_glyph_from_name (name, len, glyph);
michael@0: 
michael@0:   *glyph = 0;
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: 
michael@0: static const hb_font_funcs_t _hb_font_funcs_nil = {
michael@0:   HB_OBJECT_HEADER_STATIC,
michael@0: 
michael@0:   true, /* immutable */
michael@0: 
michael@0:   {
michael@0: #define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_nil,
michael@0:     HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
michael@0: #undef HB_FONT_FUNC_IMPLEMENT
michael@0:   }
michael@0: };
michael@0: 
michael@0: 
michael@0: /**
michael@0:  * hb_font_funcs_create: (Xconstructor)
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer full): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_font_funcs_t *
michael@0: hb_font_funcs_create (void)
michael@0: {
michael@0:   hb_font_funcs_t *ffuncs;
michael@0: 
michael@0:   if (!(ffuncs = hb_object_create<hb_font_funcs_t> ()))
michael@0:     return hb_font_funcs_get_empty ();
michael@0: 
michael@0:   ffuncs->get = _hb_font_funcs_nil.get;
michael@0: 
michael@0:   return ffuncs;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_funcs_get_empty:
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer full): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_font_funcs_t *
michael@0: hb_font_funcs_get_empty (void)
michael@0: {
michael@0:   return const_cast<hb_font_funcs_t *> (&_hb_font_funcs_nil);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_funcs_reference: (skip)
michael@0:  * @ffuncs: font functions.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_font_funcs_t *
michael@0: hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
michael@0: {
michael@0:   return hb_object_reference (ffuncs);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_funcs_destroy: (skip)
michael@0:  * @ffuncs: font functions.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
michael@0: {
michael@0:   if (!hb_object_destroy (ffuncs)) return;
michael@0: 
michael@0: #define HB_FONT_FUNC_IMPLEMENT(name) if (ffuncs->destroy.name) \
michael@0:   ffuncs->destroy.name (ffuncs->user_data.name);
michael@0:   HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
michael@0: #undef HB_FONT_FUNC_IMPLEMENT
michael@0: 
michael@0:   free (ffuncs);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_funcs_set_user_data: (skip)
michael@0:  * @ffuncs: font functions.
michael@0:  * @key: 
michael@0:  * @data: 
michael@0:  * @destroy: 
michael@0:  * @replace: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_funcs_set_user_data (hb_font_funcs_t    *ffuncs,
michael@0: 			     hb_user_data_key_t *key,
michael@0: 			     void *              data,
michael@0: 			     hb_destroy_func_t   destroy,
michael@0: 			     hb_bool_t           replace)
michael@0: {
michael@0:   return hb_object_set_user_data (ffuncs, key, data, destroy, replace);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_funcs_get_user_data: (skip)
michael@0:  * @ffuncs: font functions.
michael@0:  * @key: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer none): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void *
michael@0: hb_font_funcs_get_user_data (hb_font_funcs_t    *ffuncs,
michael@0: 			     hb_user_data_key_t *key)
michael@0: {
michael@0:   return hb_object_get_user_data (ffuncs, key);
michael@0: }
michael@0: 
michael@0: 
michael@0: /**
michael@0:  * hb_font_funcs_make_immutable:
michael@0:  * @ffuncs: font functions.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
michael@0: {
michael@0:   if (hb_object_is_inert (ffuncs))
michael@0:     return;
michael@0: 
michael@0:   ffuncs->immutable = true;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_funcs_is_immutable:
michael@0:  * @ffuncs: font functions.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs)
michael@0: {
michael@0:   return ffuncs->immutable;
michael@0: }
michael@0: 
michael@0: 
michael@0: #define HB_FONT_FUNC_IMPLEMENT(name) \
michael@0:                                                                          \
michael@0: void                                                                     \
michael@0: hb_font_funcs_set_##name##_func (hb_font_funcs_t             *ffuncs,    \
michael@0:                                  hb_font_get_##name##_func_t  func,      \
michael@0:                                  void                        *user_data, \
michael@0:                                  hb_destroy_func_t            destroy)   \
michael@0: {                                                                        \
michael@0:   if (ffuncs->immutable) {                                               \
michael@0:     if (destroy)                                                         \
michael@0:       destroy (user_data);                                               \
michael@0:     return;                                                              \
michael@0:   }                                                                      \
michael@0:                                                                          \
michael@0:   if (ffuncs->destroy.name)                                              \
michael@0:     ffuncs->destroy.name (ffuncs->user_data.name);                       \
michael@0:                                                                          \
michael@0:   if (func) {                                                            \
michael@0:     ffuncs->get.name = func;                                             \
michael@0:     ffuncs->user_data.name = user_data;                                  \
michael@0:     ffuncs->destroy.name = destroy;                                      \
michael@0:   } else {                                                               \
michael@0:     ffuncs->get.name = hb_font_get_##name##_nil;                         \
michael@0:     ffuncs->user_data.name = NULL;                                       \
michael@0:     ffuncs->destroy.name = NULL;                                         \
michael@0:   }                                                                      \
michael@0: }
michael@0: 
michael@0: HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
michael@0: #undef HB_FONT_FUNC_IMPLEMENT
michael@0: 
michael@0: 
michael@0: /* Public getters */
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph:
michael@0:  * @font: a font.
michael@0:  * @unicode: 
michael@0:  * @variation_selector: 
michael@0:  * @glyph: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph (hb_font_t *font,
michael@0: 		   hb_codepoint_t unicode, hb_codepoint_t variation_selector,
michael@0: 		   hb_codepoint_t *glyph)
michael@0: {
michael@0:   return font->get_glyph (unicode, variation_selector, glyph);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_h_advance:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_position_t
michael@0: hb_font_get_glyph_h_advance (hb_font_t *font,
michael@0: 			     hb_codepoint_t glyph)
michael@0: {
michael@0:   return font->get_glyph_h_advance (glyph);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_v_advance:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_position_t
michael@0: hb_font_get_glyph_v_advance (hb_font_t *font,
michael@0: 			     hb_codepoint_t glyph)
michael@0: {
michael@0:   return font->get_glyph_v_advance (glyph);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_h_origin:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph_h_origin (hb_font_t *font,
michael@0: 			    hb_codepoint_t glyph,
michael@0: 			    hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->get_glyph_h_origin (glyph, x, y);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_v_origin:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph_v_origin (hb_font_t *font,
michael@0: 			    hb_codepoint_t glyph,
michael@0: 			    hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->get_glyph_v_origin (glyph, x, y);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_h_kerning:
michael@0:  * @font: a font.
michael@0:  * @left_glyph: 
michael@0:  * @right_glyph: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_position_t
michael@0: hb_font_get_glyph_h_kerning (hb_font_t *font,
michael@0: 			     hb_codepoint_t left_glyph, hb_codepoint_t right_glyph)
michael@0: {
michael@0:   return font->get_glyph_h_kerning (left_glyph, right_glyph);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_v_kerning:
michael@0:  * @font: a font.
michael@0:  * @top_glyph: 
michael@0:  * @bottom_glyph: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_position_t
michael@0: hb_font_get_glyph_v_kerning (hb_font_t *font,
michael@0: 			     hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph)
michael@0: {
michael@0:   return font->get_glyph_v_kerning (top_glyph, bottom_glyph);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_extents:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @extents: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph_extents (hb_font_t *font,
michael@0: 			   hb_codepoint_t glyph,
michael@0: 			   hb_glyph_extents_t *extents)
michael@0: {
michael@0:   return font->get_glyph_extents (glyph, extents);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_contour_point:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @point_index: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph_contour_point (hb_font_t *font,
michael@0: 				 hb_codepoint_t glyph, unsigned int point_index,
michael@0: 				 hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->get_glyph_contour_point (glyph, point_index, x, y);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_name:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @name: (array length=size): 
michael@0:  * @size: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph_name (hb_font_t *font,
michael@0: 			hb_codepoint_t glyph,
michael@0: 			char *name, unsigned int size)
michael@0: {
michael@0:   return font->get_glyph_name (glyph, name, size);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_from_name:
michael@0:  * @font: a font.
michael@0:  * @name: (array length=len): 
michael@0:  * @len: 
michael@0:  * @glyph: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph_from_name (hb_font_t *font,
michael@0: 			     const char *name, int len, /* -1 means nul-terminated */
michael@0: 			     hb_codepoint_t *glyph)
michael@0: {
michael@0:   return font->get_glyph_from_name (name, len, glyph);
michael@0: }
michael@0: 
michael@0: 
michael@0: /* A bit higher-level, and with fallback */
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_advance_for_direction:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @direction: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_get_glyph_advance_for_direction (hb_font_t *font,
michael@0: 					 hb_codepoint_t glyph,
michael@0: 					 hb_direction_t direction,
michael@0: 					 hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->get_glyph_advance_for_direction (glyph, direction, x, y);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_origin_for_direction:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @direction: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_get_glyph_origin_for_direction (hb_font_t *font,
michael@0: 					hb_codepoint_t glyph,
michael@0: 					hb_direction_t direction,
michael@0: 					hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->get_glyph_origin_for_direction (glyph, direction, x, y);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_add_glyph_origin_for_direction:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @direction: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_add_glyph_origin_for_direction (hb_font_t *font,
michael@0: 					hb_codepoint_t glyph,
michael@0: 					hb_direction_t direction,
michael@0: 					hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->add_glyph_origin_for_direction (glyph, direction, x, y);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_subtract_glyph_origin_for_direction:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @direction: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_subtract_glyph_origin_for_direction (hb_font_t *font,
michael@0: 					     hb_codepoint_t glyph,
michael@0: 					     hb_direction_t direction,
michael@0: 					     hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->subtract_glyph_origin_for_direction (glyph, direction, x, y);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_kerning_for_direction:
michael@0:  * @font: a font.
michael@0:  * @first_glyph: 
michael@0:  * @second_glyph: 
michael@0:  * @direction: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_get_glyph_kerning_for_direction (hb_font_t *font,
michael@0: 					 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
michael@0: 					 hb_direction_t direction,
michael@0: 					 hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->get_glyph_kerning_for_direction (first_glyph, second_glyph, direction, x, y);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_extents_for_origin:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @direction: 
michael@0:  * @extents: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph_extents_for_origin (hb_font_t *font,
michael@0: 				      hb_codepoint_t glyph,
michael@0: 				      hb_direction_t direction,
michael@0: 				      hb_glyph_extents_t *extents)
michael@0: {
michael@0:   return font->get_glyph_extents_for_origin (glyph, direction, extents);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_glyph_contour_point_for_origin:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @point_index: 
michael@0:  * @direction: 
michael@0:  * @x: (out): 
michael@0:  * @y: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_get_glyph_contour_point_for_origin (hb_font_t *font,
michael@0: 					    hb_codepoint_t glyph, unsigned int point_index,
michael@0: 					    hb_direction_t direction,
michael@0: 					    hb_position_t *x, hb_position_t *y)
michael@0: {
michael@0:   return font->get_glyph_contour_point_for_origin (glyph, point_index, direction, x, y);
michael@0: }
michael@0: 
michael@0: /* Generates gidDDD if glyph has no name. */
michael@0: /**
michael@0:  * hb_font_glyph_to_string:
michael@0:  * @font: a font.
michael@0:  * @glyph: 
michael@0:  * @s: (array length=size): 
michael@0:  * @size: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_glyph_to_string (hb_font_t *font,
michael@0: 			 hb_codepoint_t glyph,
michael@0: 			 char *s, unsigned int size)
michael@0: {
michael@0:   font->glyph_to_string (glyph, s, size);
michael@0: }
michael@0: 
michael@0: /* Parses gidDDD and uniUUUU strings automatically. */
michael@0: /**
michael@0:  * hb_font_glyph_from_string:
michael@0:  * @font: a font.
michael@0:  * @s: (array length=len): 
michael@0:  * @len: 
michael@0:  * @glyph: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_glyph_from_string (hb_font_t *font,
michael@0: 			   const char *s, int len, /* -1 means nul-terminated */
michael@0: 			   hb_codepoint_t *glyph)
michael@0: {
michael@0:   return font->glyph_from_string (s, len, glyph);
michael@0: }
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * hb_font_t
michael@0:  */
michael@0: 
michael@0: /**
michael@0:  * hb_font_create: (Xconstructor)
michael@0:  * @face: a face.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer full): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_font_t *
michael@0: hb_font_create (hb_face_t *face)
michael@0: {
michael@0:   hb_font_t *font;
michael@0: 
michael@0:   if (unlikely (!face))
michael@0:     face = hb_face_get_empty ();
michael@0:   if (unlikely (hb_object_is_inert (face)))
michael@0:     return hb_font_get_empty ();
michael@0:   if (!(font = hb_object_create<hb_font_t> ()))
michael@0:     return hb_font_get_empty ();
michael@0: 
michael@0:   hb_face_make_immutable (face);
michael@0:   font->face = hb_face_reference (face);
michael@0:   font->klass = hb_font_funcs_get_empty ();
michael@0: 
michael@0:   return font;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_create_sub_font:
michael@0:  * @parent: parent font.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer full): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_font_t *
michael@0: hb_font_create_sub_font (hb_font_t *parent)
michael@0: {
michael@0:   if (unlikely (!parent))
michael@0:     return hb_font_get_empty ();
michael@0: 
michael@0:   hb_font_t *font = hb_font_create (parent->face);
michael@0: 
michael@0:   if (unlikely (hb_object_is_inert (font)))
michael@0:     return font;
michael@0: 
michael@0:   hb_font_make_immutable (parent);
michael@0:   font->parent = hb_font_reference (parent);
michael@0: 
michael@0:   font->x_scale = parent->x_scale;
michael@0:   font->y_scale = parent->y_scale;
michael@0:   font->x_ppem = parent->x_ppem;
michael@0:   font->y_ppem = parent->y_ppem;
michael@0: 
michael@0:   return font;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_empty:
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer full)
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_font_t *
michael@0: hb_font_get_empty (void)
michael@0: {
michael@0:   static const hb_font_t _hb_font_nil = {
michael@0:     HB_OBJECT_HEADER_STATIC,
michael@0: 
michael@0:     true, /* immutable */
michael@0: 
michael@0:     NULL, /* parent */
michael@0:     const_cast<hb_face_t *> (&_hb_face_nil),
michael@0: 
michael@0:     0, /* x_scale */
michael@0:     0, /* y_scale */
michael@0: 
michael@0:     0, /* x_ppem */
michael@0:     0, /* y_ppem */
michael@0: 
michael@0:     const_cast<hb_font_funcs_t *> (&_hb_font_funcs_nil), /* klass */
michael@0:     NULL, /* user_data */
michael@0:     NULL, /* destroy */
michael@0: 
michael@0:     {
michael@0: #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
michael@0: #include "hb-shaper-list.hh"
michael@0: #undef HB_SHAPER_IMPLEMENT
michael@0:     }
michael@0:   };
michael@0: 
michael@0:   return const_cast<hb_font_t *> (&_hb_font_nil);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_reference: (skip)
michael@0:  * @font: a font.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer full): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_font_t *
michael@0: hb_font_reference (hb_font_t *font)
michael@0: {
michael@0:   return hb_object_reference (font);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_destroy: (skip)
michael@0:  * @font: a font.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_destroy (hb_font_t *font)
michael@0: {
michael@0:   if (!hb_object_destroy (font)) return;
michael@0: 
michael@0: #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, font);
michael@0: #include "hb-shaper-list.hh"
michael@0: #undef HB_SHAPER_IMPLEMENT
michael@0: 
michael@0:   if (font->destroy)
michael@0:     font->destroy (font->user_data);
michael@0: 
michael@0:   hb_font_destroy (font->parent);
michael@0:   hb_face_destroy (font->face);
michael@0:   hb_font_funcs_destroy (font->klass);
michael@0: 
michael@0:   free (font);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_set_user_data: (skip)
michael@0:  * @font: a font.
michael@0:  * @key: 
michael@0:  * @data: 
michael@0:  * @destroy: 
michael@0:  * @replace: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_set_user_data (hb_font_t          *font,
michael@0: 		       hb_user_data_key_t *key,
michael@0: 		       void *              data,
michael@0: 		       hb_destroy_func_t   destroy,
michael@0: 		       hb_bool_t           replace)
michael@0: {
michael@0:   return hb_object_set_user_data (font, key, data, destroy, replace);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_user_data: (skip)
michael@0:  * @font: a font.
michael@0:  * @key: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer none): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void *
michael@0: hb_font_get_user_data (hb_font_t          *font,
michael@0: 		       hb_user_data_key_t *key)
michael@0: {
michael@0:   return hb_object_get_user_data (font, key);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_make_immutable:
michael@0:  * @font: a font.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_make_immutable (hb_font_t *font)
michael@0: {
michael@0:   if (hb_object_is_inert (font))
michael@0:     return;
michael@0: 
michael@0:   font->immutable = true;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_is_immutable:
michael@0:  * @font: a font.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_bool_t
michael@0: hb_font_is_immutable (hb_font_t *font)
michael@0: {
michael@0:   return font->immutable;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_parent:
michael@0:  * @font: a font.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer none): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_font_t *
michael@0: hb_font_get_parent (hb_font_t *font)
michael@0: {
michael@0:   return font->parent;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_face:
michael@0:  * @font: a font.
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Return value: (transfer none): 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: hb_face_t *
michael@0: hb_font_get_face (hb_font_t *font)
michael@0: {
michael@0:   return font->face;
michael@0: }
michael@0: 
michael@0: 
michael@0: /**
michael@0:  * hb_font_set_funcs:
michael@0:  * @font: a font.
michael@0:  * @klass: (closure font_data) (destroy destroy) (scope notified):
michael@0:  * @font_data: 
michael@0:  * @destroy: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_set_funcs (hb_font_t         *font,
michael@0: 		   hb_font_funcs_t   *klass,
michael@0: 		   void              *font_data,
michael@0: 		   hb_destroy_func_t  destroy)
michael@0: {
michael@0:   if (font->immutable) {
michael@0:     if (destroy)
michael@0:       destroy (font_data);
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   if (font->destroy)
michael@0:     font->destroy (font->user_data);
michael@0: 
michael@0:   if (!klass)
michael@0:     klass = hb_font_funcs_get_empty ();
michael@0: 
michael@0:   hb_font_funcs_reference (klass);
michael@0:   hb_font_funcs_destroy (font->klass);
michael@0:   font->klass = klass;
michael@0:   font->user_data = font_data;
michael@0:   font->destroy = destroy;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_set_funcs_data:
michael@0:  * @font: a font.
michael@0:  * @font_data: (destroy destroy) (scope notified):
michael@0:  * @destroy: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_set_funcs_data (hb_font_t         *font,
michael@0: 		        void              *font_data,
michael@0: 		        hb_destroy_func_t  destroy)
michael@0: {
michael@0:   /* Destroy user_data? */
michael@0:   if (font->immutable) {
michael@0:     if (destroy)
michael@0:       destroy (font_data);
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   if (font->destroy)
michael@0:     font->destroy (font->user_data);
michael@0: 
michael@0:   font->user_data = font_data;
michael@0:   font->destroy = destroy;
michael@0: }
michael@0: 
michael@0: 
michael@0: /**
michael@0:  * hb_font_set_scale:
michael@0:  * @font: a font.
michael@0:  * @x_scale: 
michael@0:  * @y_scale: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_set_scale (hb_font_t *font,
michael@0: 		   int x_scale,
michael@0: 		   int y_scale)
michael@0: {
michael@0:   if (font->immutable)
michael@0:     return;
michael@0: 
michael@0:   font->x_scale = x_scale;
michael@0:   font->y_scale = y_scale;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_scale:
michael@0:  * @font: a font.
michael@0:  * @x_scale: (out): 
michael@0:  * @y_scale: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_get_scale (hb_font_t *font,
michael@0: 		   int *x_scale,
michael@0: 		   int *y_scale)
michael@0: {
michael@0:   if (x_scale) *x_scale = font->x_scale;
michael@0:   if (y_scale) *y_scale = font->y_scale;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_set_ppem:
michael@0:  * @font: a font.
michael@0:  * @x_ppem: 
michael@0:  * @y_ppem: 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_set_ppem (hb_font_t *font,
michael@0: 		  unsigned int x_ppem,
michael@0: 		  unsigned int y_ppem)
michael@0: {
michael@0:   if (font->immutable)
michael@0:     return;
michael@0: 
michael@0:   font->x_ppem = x_ppem;
michael@0:   font->y_ppem = y_ppem;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * hb_font_get_ppem:
michael@0:  * @font: a font.
michael@0:  * @x_ppem: (out): 
michael@0:  * @y_ppem: (out): 
michael@0:  *
michael@0:  * 
michael@0:  *
michael@0:  * Since: 1.0
michael@0:  **/
michael@0: void
michael@0: hb_font_get_ppem (hb_font_t *font,
michael@0: 		  unsigned int *x_ppem,
michael@0: 		  unsigned int *y_ppem)
michael@0: {
michael@0:   if (x_ppem) *x_ppem = font->x_ppem;
michael@0:   if (y_ppem) *y_ppem = font->y_ppem;
michael@0: }