/* * Copyright © 2009 Red Hat, Inc. * * 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. * * Red Hat Author(s): Behdad Esfahbod */ #include "hb-private.hh" #include "hb-ot-layout-private.hh" #include "hb-font-private.hh" #include "hb-blob.h" #include "hb-open-file-private.hh" #include "hb-ot-head-table.hh" #include /* * hb_font_funcs_t */ static hb_bool_t hb_font_get_glyph_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { if (font->parent) return hb_font_get_glyph (font->parent, unicode, variation_selector, glyph); *glyph = 0; return FALSE; } static hb_position_t hb_font_get_glyph_h_advance_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph, void *user_data HB_UNUSED) { if (font->parent) return font->parent_scale_x_distance (hb_font_get_glyph_h_advance (font->parent, glyph)); return font->x_scale; } static hb_position_t hb_font_get_glyph_v_advance_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph, void *user_data HB_UNUSED) { if (font->parent) return font->parent_scale_y_distance (hb_font_get_glyph_v_advance (font->parent, glyph)); return font->y_scale; } static hb_bool_t hb_font_get_glyph_h_origin_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { if (font->parent) { hb_bool_t ret = hb_font_get_glyph_h_origin (font->parent, glyph, x, y); if (ret) font->parent_scale_position (x, y); return ret; } *x = *y = 0; return FALSE; } static hb_bool_t hb_font_get_glyph_v_origin_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { if (font->parent) { hb_bool_t ret = hb_font_get_glyph_v_origin (font->parent, glyph, x, y); if (ret) font->parent_scale_position (x, y); return ret; } *x = *y = 0; return FALSE; } static hb_position_t hb_font_get_glyph_h_kerning_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t left_glyph, hb_codepoint_t right_glyph, void *user_data HB_UNUSED) { if (font->parent) return font->parent_scale_x_distance (hb_font_get_glyph_h_kerning (font->parent, left_glyph, right_glyph)); return 0; } static hb_position_t hb_font_get_glyph_v_kerning_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph, void *user_data HB_UNUSED) { if (font->parent) return font->parent_scale_y_distance (hb_font_get_glyph_v_kerning (font->parent, top_glyph, bottom_glyph)); return 0; } static hb_bool_t hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_glyph_extents_t *extents, void *user_data HB_UNUSED) { if (font->parent) { hb_bool_t ret = hb_font_get_glyph_extents (font->parent, glyph, extents); if (ret) { font->parent_scale_position (&extents->x_bearing, &extents->y_bearing); font->parent_scale_distance (&extents->width, &extents->height); } return ret; } memset (extents, 0, sizeof (*extents)); return FALSE; } static hb_bool_t hb_font_get_glyph_contour_point_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph, unsigned int point_index, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { if (font->parent) { hb_bool_t ret = hb_font_get_glyph_contour_point (font->parent, glyph, point_index, x, y); if (ret) font->parent_scale_position (x, y); return ret; } *x = *y = 0; return FALSE; } static hb_font_funcs_t _hb_font_funcs_nil = { HB_OBJECT_HEADER_STATIC, TRUE, /* immutable */ { #define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_nil, HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT } }; hb_font_funcs_t * hb_font_funcs_create (void) { hb_font_funcs_t *ffuncs; if (!(ffuncs = hb_object_create ())) return &_hb_font_funcs_nil; ffuncs->get = _hb_font_funcs_nil.get; return ffuncs; } hb_font_funcs_t * hb_font_funcs_get_empty (void) { return &_hb_font_funcs_nil; } hb_font_funcs_t * hb_font_funcs_reference (hb_font_funcs_t *ffuncs) { return hb_object_reference (ffuncs); } void hb_font_funcs_destroy (hb_font_funcs_t *ffuncs) { if (!hb_object_destroy (ffuncs)) return; #define HB_FONT_FUNC_IMPLEMENT(name) if (ffuncs->destroy.name) \ ffuncs->destroy.name (ffuncs->user_data.name); HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT free (ffuncs); } hb_bool_t hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs, hb_user_data_key_t *key, void * data, hb_destroy_func_t destroy, hb_bool_t replace) { return hb_object_set_user_data (ffuncs, key, data, destroy, replace); } void * hb_font_funcs_get_user_data (hb_font_funcs_t *ffuncs, hb_user_data_key_t *key) { return hb_object_get_user_data (ffuncs, key); } void hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs) { if (hb_object_is_inert (ffuncs)) return; ffuncs->immutable = TRUE; } hb_bool_t hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs) { return ffuncs->immutable; } #define HB_FONT_FUNC_IMPLEMENT(name) \ \ void \ hb_font_funcs_set_##name##_func (hb_font_funcs_t *ffuncs, \ hb_font_get_##name##_func_t func, \ void *user_data, \ hb_destroy_func_t destroy) \ { \ if (ffuncs->immutable) \ return; \ \ if (ffuncs->destroy.name) \ ffuncs->destroy.name (ffuncs->user_data.name); \ \ if (func) { \ ffuncs->get.name = func; \ ffuncs->user_data.name = user_data; \ ffuncs->destroy.name = destroy; \ } else { \ ffuncs->get.name = hb_font_get_##name##_nil; \ ffuncs->user_data.name = NULL; \ ffuncs->destroy.name = NULL; \ } \ } HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT hb_bool_t hb_font_get_glyph (hb_font_t *font, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph) { *glyph = 0; return font->klass->get.glyph (font, font->user_data, unicode, variation_selector, glyph, font->klass->user_data.glyph); } hb_position_t hb_font_get_glyph_h_advance (hb_font_t *font, hb_codepoint_t glyph) { return font->klass->get.glyph_h_advance (font, font->user_data, glyph, font->klass->user_data.glyph_h_advance); } hb_position_t hb_font_get_glyph_v_advance (hb_font_t *font, hb_codepoint_t glyph) { return font->klass->get.glyph_v_advance (font, font->user_data, glyph, font->klass->user_data.glyph_v_advance); } hb_bool_t hb_font_get_glyph_h_origin (hb_font_t *font, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y) { *x = *y = 0; return font->klass->get.glyph_h_origin (font, font->user_data, glyph, x, y, font->klass->user_data.glyph_h_origin); } hb_bool_t hb_font_get_glyph_v_origin (hb_font_t *font, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y) { *x = *y = 0; return font->klass->get.glyph_v_origin (font, font->user_data, glyph, x, y, font->klass->user_data.glyph_v_origin); } hb_position_t hb_font_get_glyph_h_kerning (hb_font_t *font, hb_codepoint_t left_glyph, hb_codepoint_t right_glyph) { return font->klass->get.glyph_h_kerning (font, font->user_data, left_glyph, right_glyph, font->klass->user_data.glyph_h_kerning); } hb_position_t hb_font_get_glyph_v_kerning (hb_font_t *font, hb_codepoint_t left_glyph, hb_codepoint_t right_glyph) { return font->klass->get.glyph_v_kerning (font, font->user_data, left_glyph, right_glyph, font->klass->user_data.glyph_v_kerning); } hb_bool_t hb_font_get_glyph_extents (hb_font_t *font, hb_codepoint_t glyph, hb_glyph_extents_t *extents) { memset (extents, 0, sizeof (*extents)); return font->klass->get.glyph_extents (font, font->user_data, glyph, extents, font->klass->user_data.glyph_extents); } hb_bool_t hb_font_get_glyph_contour_point (hb_font_t *font, hb_codepoint_t glyph, unsigned int point_index, hb_position_t *x, hb_position_t *y) { *x = *y = 0; return font->klass->get.glyph_contour_point (font, font->user_data, glyph, point_index, x, y, font->klass->user_data.glyph_contour_point); } /* A bit higher-level, and with fallback */ void hb_font_get_glyph_advance_for_direction (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) { *x = hb_font_get_glyph_h_advance (font, glyph); *y = 0; } else { *x = 0; *y = hb_font_get_glyph_v_advance (font, glyph); } } static void guess_v_origin_minus_h_origin (hb_font_t *font, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y) { *x = hb_font_get_glyph_h_advance (font, glyph) / 2; /* TODO use font_metics.ascent */ *y = font->y_scale; } void hb_font_get_glyph_origin_for_direction (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) { hb_bool_t ret = hb_font_get_glyph_h_origin (font, glyph, x, y); if (!ret && (ret = hb_font_get_glyph_v_origin (font, glyph, x, y))) { hb_position_t dx, dy; guess_v_origin_minus_h_origin (font, glyph, &dx, &dy); *x -= dx; *y -= dy; } } else { hb_bool_t ret = hb_font_get_glyph_v_origin (font, glyph, x, y); if (!ret && (ret = hb_font_get_glyph_h_origin (font, glyph, x, y))) { hb_position_t dx, dy; guess_v_origin_minus_h_origin (font, glyph, &dx, &dy); *x += dx; *y += dy; } } } void hb_font_add_glyph_origin_for_direction (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { hb_position_t origin_x, origin_y; hb_font_get_glyph_origin_for_direction (font, glyph, direction, &origin_x, &origin_y); *x += origin_x; *y += origin_y; } void hb_font_subtract_glyph_origin_for_direction (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { hb_position_t origin_x, origin_y; hb_font_get_glyph_origin_for_direction (font, glyph, direction, &origin_x, &origin_y); *x -= origin_x; *y -= origin_y; } void hb_font_get_glyph_kerning_for_direction (hb_font_t *font, hb_codepoint_t first_glyph, hb_codepoint_t second_glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) { *x = hb_font_get_glyph_h_kerning (font, first_glyph, second_glyph); *y = 0; } else { *x = 0; *y = hb_font_get_glyph_v_kerning (font, first_glyph, second_glyph); } } hb_bool_t hb_font_get_glyph_extents_for_origin (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_glyph_extents_t *extents) { hb_bool_t ret = hb_font_get_glyph_extents (font, glyph, extents); if (ret) hb_font_subtract_glyph_origin_for_direction (font, glyph, direction, &extents->x_bearing, &extents->y_bearing); return ret; } hb_bool_t hb_font_get_glyph_contour_point_for_origin (hb_font_t *font, hb_codepoint_t glyph, unsigned int point_index, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { hb_bool_t ret = hb_font_get_glyph_contour_point (font, glyph, point_index, x, y); if (ret) hb_font_subtract_glyph_origin_for_direction (font, glyph, direction, x, y); return ret; } /* * hb_face_t */ static hb_face_t _hb_face_nil = { HB_OBJECT_HEADER_STATIC, TRUE, /* immutable */ NULL, /* reference_table */ NULL, /* user_data */ NULL, /* destroy */ NULL, /* ot_layout */ 0, /* index */ 1000 /* upem */ }; hb_face_t * hb_face_create_for_tables (hb_reference_table_func_t reference_table, void *user_data, hb_destroy_func_t destroy) { hb_face_t *face; if (!reference_table || !(face = hb_object_create ())) { if (destroy) destroy (user_data); return &_hb_face_nil; } face->reference_table = reference_table; face->user_data = user_data; face->destroy = destroy; face->ot_layout = _hb_ot_layout_create (face); face->upem = 0; return face; } typedef struct _hb_face_for_data_closure_t { hb_blob_t *blob; unsigned int index; } hb_face_for_data_closure_t; static hb_face_for_data_closure_t * _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index) { hb_face_for_data_closure_t *closure; closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t)); if (unlikely (!closure)) return NULL; closure->blob = blob; closure->index = index; return closure; } static void _hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure) { hb_blob_destroy (closure->blob); free (closure); } static hb_blob_t * _hb_face_for_data_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data) { hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data; if (tag == HB_TAG_NONE) return hb_blob_reference (data->blob); const OpenTypeFontFile &ot_file = *Sanitizer::lock_instance (data->blob); const OpenTypeFontFace &ot_face = ot_file.get_face (data->index); const OpenTypeTable &table = ot_face.get_table_by_tag (tag); hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length); return blob; } hb_face_t * hb_face_create (hb_blob_t *blob, unsigned int index) { hb_face_t *face; if (unlikely (!blob || !hb_blob_get_length (blob))) return &_hb_face_nil; hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (Sanitizer::sanitize (hb_blob_reference (blob)), index); if (unlikely (!closure)) return &_hb_face_nil; face = hb_face_create_for_tables (_hb_face_for_data_reference_table, closure, (hb_destroy_func_t) _hb_face_for_data_closure_destroy); hb_face_set_index (face, index); return face; } hb_face_t * hb_face_get_empty (void) { return &_hb_face_nil; } hb_face_t * hb_face_reference (hb_face_t *face) { return hb_object_reference (face); } void hb_face_destroy (hb_face_t *face) { if (!hb_object_destroy (face)) return; _hb_ot_layout_destroy (face->ot_layout); if (face->destroy) face->destroy (face->user_data); free (face); } hb_bool_t hb_face_set_user_data (hb_face_t *face, hb_user_data_key_t *key, void * data, hb_destroy_func_t destroy, hb_bool_t replace) { return hb_object_set_user_data (face, key, data, destroy, replace); } void * hb_face_get_user_data (hb_face_t *face, hb_user_data_key_t *key) { return hb_object_get_user_data (face, key); } void hb_face_make_immutable (hb_face_t *face) { if (hb_object_is_inert (face)) return; face->immutable = true; } hb_bool_t hb_face_is_immutable (hb_face_t *face) { return face->immutable; } hb_blob_t * hb_face_reference_table (hb_face_t *face, hb_tag_t tag) { hb_blob_t *blob; if (unlikely (!face || !face->reference_table)) return hb_blob_get_empty (); blob = face->reference_table (face, tag, face->user_data); if (unlikely (!blob)) return hb_blob_get_empty (); return blob; } hb_blob_t * hb_face_reference_blob (hb_face_t *face) { return hb_face_reference_table (face, HB_TAG_NONE); } void hb_face_set_index (hb_face_t *face, unsigned int index) { if (hb_object_is_inert (face)) return; face->index = 0; } unsigned int hb_face_get_index (hb_face_t *face) { return face->index; } void hb_face_set_upem (hb_face_t *face, unsigned int upem) { if (hb_object_is_inert (face)) return; face->upem = upem; } unsigned int hb_face_get_upem (hb_face_t *face) { if (unlikely (!face->upem)) { hb_blob_t *head_blob = Sanitizer::sanitize (hb_face_reference_table (face, HB_OT_TAG_head)); const head *head_table = Sanitizer::lock_instance (head_blob); face->upem = head_table->get_upem (); hb_blob_destroy (head_blob); } return face->upem; } /* * hb_font_t */ static hb_font_t _hb_font_nil = { HB_OBJECT_HEADER_STATIC, TRUE, /* immutable */ NULL, /* parent */ &_hb_face_nil, 0, /* x_scale */ 0, /* y_scale */ 0, /* x_ppem */ 0, /* y_ppem */ &_hb_font_funcs_nil, /* klass */ NULL, /* user_data */ NULL /* destroy */ }; hb_font_t * hb_font_create (hb_face_t *face) { hb_font_t *font; if (unlikely (!face)) face = &_hb_face_nil; if (unlikely (hb_object_is_inert (face))) return &_hb_font_nil; if (!(font = hb_object_create ())) return &_hb_font_nil; hb_face_make_immutable (face); font->face = hb_face_reference (face); font->klass = &_hb_font_funcs_nil; return font; } hb_font_t * hb_font_create_sub_font (hb_font_t *parent) { if (unlikely (!parent)) return &_hb_font_nil; hb_font_t *font = hb_font_create (parent->face); if (unlikely (hb_object_is_inert (font))) return font; hb_font_make_immutable (parent); font->parent = hb_font_reference (parent); font->x_scale = parent->x_scale; font->y_scale = parent->y_scale; font->x_ppem = parent->x_ppem; font->y_ppem = parent->y_ppem; font->klass = &_hb_font_funcs_nil; return font; } hb_font_t * hb_font_get_empty (void) { return &_hb_font_nil; } hb_font_t * hb_font_reference (hb_font_t *font) { return hb_object_reference (font); } void hb_font_destroy (hb_font_t *font) { if (!hb_object_destroy (font)) return; hb_font_destroy (font->parent); hb_face_destroy (font->face); hb_font_funcs_destroy (font->klass); if (font->destroy) font->destroy (font->user_data); free (font); } hb_bool_t hb_font_set_user_data (hb_font_t *font, hb_user_data_key_t *key, void * data, hb_destroy_func_t destroy, hb_bool_t replace) { return hb_object_set_user_data (font, key, data, destroy, replace); } void * hb_font_get_user_data (hb_font_t *font, hb_user_data_key_t *key) { return hb_object_get_user_data (font, key); } void hb_font_make_immutable (hb_font_t *font) { if (hb_object_is_inert (font)) return; font->immutable = true; } hb_bool_t hb_font_is_immutable (hb_font_t *font) { return font->immutable; } hb_font_t * hb_font_get_parent (hb_font_t *font) { return font->parent; } hb_face_t * hb_font_get_face (hb_font_t *font) { return font->face; } void hb_font_set_funcs (hb_font_t *font, hb_font_funcs_t *klass, void *user_data, hb_destroy_func_t destroy) { if (font->immutable) return; if (font->destroy) font->destroy (font->user_data); if (!klass) klass = &_hb_font_funcs_nil; hb_font_funcs_reference (klass); hb_font_funcs_destroy (font->klass); font->klass = klass; font->user_data = user_data; font->destroy = destroy; } void hb_font_set_funcs_data (hb_font_t *font, void *user_data, hb_destroy_func_t destroy) { if (font->immutable) return; if (font->destroy) font->destroy (font->user_data); font->user_data = user_data; font->destroy = destroy; } void hb_font_set_scale (hb_font_t *font, int x_scale, int y_scale) { if (font->immutable) return; font->x_scale = x_scale; font->y_scale = y_scale; } void hb_font_get_scale (hb_font_t *font, int *x_scale, int *y_scale) { if (x_scale) *x_scale = font->x_scale; if (y_scale) *y_scale = font->y_scale; } void hb_font_set_ppem (hb_font_t *font, unsigned int x_ppem, unsigned int y_ppem) { if (font->immutable) return; font->x_ppem = x_ppem; font->y_ppem = y_ppem; } void hb_font_get_ppem (hb_font_t *font, unsigned int *x_ppem, unsigned int *y_ppem) { if (x_ppem) *x_ppem = font->x_ppem; if (y_ppem) *y_ppem = font->y_ppem; }