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-rw-r--r--src/3rdparty/harfbuzz-ng/src/hb-font.cc739
1 files changed, 739 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-font.cc b/src/3rdparty/harfbuzz-ng/src/hb-font.cc
new file mode 100644
index 0000000000..c2f6f6ddd5
--- /dev/null
+++ b/src/3rdparty/harfbuzz-ng/src/hb-font.cc
@@ -0,0 +1,739 @@
+/*
+ * Copyright © 2009 Red Hat, Inc.
+ * Copyright © 2012 Google, 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
+ * Google 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-ot-maxp-table.hh"
+
+#include "hb-cache-private.hh"
+
+#include <string.h>
+
+
+/*
+ * hb_font_funcs_t
+ */
+
+static hb_bool_t
+hb_font_get_glyph_nil (hb_font_t *font,
+ 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 font->parent->get_glyph (unicode, variation_selector, glyph);
+
+ *glyph = 0;
+ return false;
+}
+
+static hb_position_t
+hb_font_get_glyph_h_advance_nil (hb_font_t *font,
+ void *font_data HB_UNUSED,
+ hb_codepoint_t glyph,
+ void *user_data HB_UNUSED)
+{
+ if (font->parent)
+ return font->parent_scale_x_distance (font->parent->get_glyph_h_advance (glyph));
+
+ return font->x_scale;
+}
+
+static hb_position_t
+hb_font_get_glyph_v_advance_nil (hb_font_t *font,
+ void *font_data HB_UNUSED,
+ hb_codepoint_t glyph,
+ void *user_data HB_UNUSED)
+{
+ if (font->parent)
+ return font->parent_scale_y_distance (font->parent->get_glyph_v_advance (glyph));
+
+ return font->y_scale;
+}
+
+static hb_bool_t
+hb_font_get_glyph_h_origin_nil (hb_font_t *font,
+ 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 = font->parent->get_glyph_h_origin (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,
+ 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 = font->parent->get_glyph_v_origin (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,
+ 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 (font->parent->get_glyph_h_kerning (left_glyph, right_glyph));
+
+ return 0;
+}
+
+static hb_position_t
+hb_font_get_glyph_v_kerning_nil (hb_font_t *font,
+ 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 (font->parent->get_glyph_v_kerning (top_glyph, bottom_glyph));
+
+ return 0;
+}
+
+static hb_bool_t
+hb_font_get_glyph_extents_nil (hb_font_t *font,
+ 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 = font->parent->get_glyph_extents (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,
+ 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 = font->parent->get_glyph_contour_point (glyph, point_index, 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_name_nil (hb_font_t *font,
+ void *font_data HB_UNUSED,
+ hb_codepoint_t glyph,
+ char *name, unsigned int size,
+ void *user_data HB_UNUSED)
+{
+ if (font->parent)
+ return font->parent->get_glyph_name (glyph, name, size);
+
+ if (size) *name = '\0';
+ return false;
+}
+
+static hb_bool_t
+hb_font_get_glyph_from_name_nil (hb_font_t *font,
+ void *font_data HB_UNUSED,
+ const char *name, int len, /* -1 means nul-terminated */
+ hb_codepoint_t *glyph,
+ void *user_data HB_UNUSED)
+{
+ if (font->parent)
+ return font->parent->get_glyph_from_name (name, len, glyph);
+
+ *glyph = 0;
+ return false;
+}
+
+
+static const 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<hb_font_funcs_t> ()))
+ return hb_font_funcs_get_empty ();
+
+ ffuncs->get = _hb_font_funcs_nil.get;
+
+ return ffuncs;
+}
+
+hb_font_funcs_t *
+hb_font_funcs_get_empty (void)
+{
+ return const_cast<hb_font_funcs_t *> (&_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) { \
+ if (destroy) \
+ destroy (user_data); \
+ 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
+
+
+/* Public getters */
+
+hb_bool_t
+hb_font_get_glyph (hb_font_t *font,
+ hb_codepoint_t unicode, hb_codepoint_t variation_selector,
+ hb_codepoint_t *glyph)
+{
+ return font->get_glyph (unicode, variation_selector, glyph);
+}
+
+hb_position_t
+hb_font_get_glyph_h_advance (hb_font_t *font,
+ hb_codepoint_t glyph)
+{
+ return font->get_glyph_h_advance (glyph);
+}
+
+hb_position_t
+hb_font_get_glyph_v_advance (hb_font_t *font,
+ hb_codepoint_t glyph)
+{
+ return font->get_glyph_v_advance (glyph);
+}
+
+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)
+{
+ return font->get_glyph_h_origin (glyph, x, y);
+}
+
+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)
+{
+ return font->get_glyph_v_origin (glyph, x, y);
+}
+
+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->get_glyph_h_kerning (left_glyph, right_glyph);
+}
+
+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->get_glyph_v_kerning (left_glyph, right_glyph);
+}
+
+hb_bool_t
+hb_font_get_glyph_extents (hb_font_t *font,
+ hb_codepoint_t glyph,
+ hb_glyph_extents_t *extents)
+{
+ return font->get_glyph_extents (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)
+{
+ return font->get_glyph_contour_point (glyph, point_index, x, y);
+}
+
+hb_bool_t
+hb_font_get_glyph_name (hb_font_t *font,
+ hb_codepoint_t glyph,
+ char *name, unsigned int size)
+{
+ return font->get_glyph_name (glyph, name, size);
+}
+
+hb_bool_t
+hb_font_get_glyph_from_name (hb_font_t *font,
+ const char *name, int len, /* -1 means nul-terminated */
+ hb_codepoint_t *glyph)
+{
+ return font->get_glyph_from_name (name, len, glyph);
+}
+
+
+/* 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)
+{
+ return font->get_glyph_advance_for_direction (glyph, direction, x, y);
+}
+
+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)
+{
+ return font->get_glyph_origin_for_direction (glyph, direction, x, y);
+}
+
+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)
+{
+ return font->add_glyph_origin_for_direction (glyph, direction, x, 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)
+{
+ return font->subtract_glyph_origin_for_direction (glyph, direction, x, 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)
+{
+ return font->get_glyph_kerning_for_direction (first_glyph, second_glyph, direction, x, y);
+}
+
+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)
+{
+ return font->get_glyph_extents_for_origin (glyph, direction, extents);
+}
+
+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)
+{
+ return font->get_glyph_contour_point_for_origin (glyph, point_index, direction, x, y);
+}
+
+/* Generates gidDDD if glyph has no name. */
+void
+hb_font_glyph_to_string (hb_font_t *font,
+ hb_codepoint_t glyph,
+ char *s, unsigned int size)
+{
+ font->glyph_to_string (glyph, s, size);
+}
+
+/* Parses gidDDD and uniUUUU strings automatically. */
+hb_bool_t
+hb_font_glyph_from_string (hb_font_t *font,
+ const char *s, int len, /* -1 means nul-terminated */
+ hb_codepoint_t *glyph)
+{
+ return font->glyph_from_string (s, len, glyph);
+}
+
+
+/*
+ * hb_font_t
+ */
+
+hb_font_t *
+hb_font_create (hb_face_t *face)
+{
+ hb_font_t *font;
+
+ if (unlikely (!face))
+ face = hb_face_get_empty ();
+ if (unlikely (hb_object_is_inert (face)))
+ return hb_font_get_empty ();
+ if (!(font = hb_object_create<hb_font_t> ()))
+ return hb_font_get_empty ();
+
+ hb_face_make_immutable (face);
+ font->face = hb_face_reference (face);
+ font->klass = hb_font_funcs_get_empty ();
+
+ return font;
+}
+
+hb_font_t *
+hb_font_create_sub_font (hb_font_t *parent)
+{
+ if (unlikely (!parent))
+ return hb_font_get_empty ();
+
+ 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;
+
+ return font;
+}
+
+hb_font_t *
+hb_font_get_empty (void)
+{
+ static const hb_font_t _hb_font_nil = {
+ HB_OBJECT_HEADER_STATIC,
+
+ true, /* immutable */
+
+ NULL, /* parent */
+ const_cast<hb_face_t *> (&_hb_face_nil),
+
+ 0, /* x_scale */
+ 0, /* y_scale */
+
+ 0, /* x_ppem */
+ 0, /* y_ppem */
+
+ const_cast<hb_font_funcs_t *> (&_hb_font_funcs_nil), /* klass */
+ NULL, /* user_data */
+ NULL, /* destroy */
+
+ {
+#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+ }
+ };
+
+ return const_cast<hb_font_t *> (&_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;
+
+#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, font);
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+
+ if (font->destroy)
+ font->destroy (font->user_data);
+
+ hb_font_destroy (font->parent);
+ hb_face_destroy (font->face);
+ hb_font_funcs_destroy (font->klass);
+
+ 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) {
+ if (destroy)
+ destroy (user_data);
+ return;
+ }
+
+ if (font->destroy)
+ font->destroy (font->user_data);
+
+ if (!klass)
+ klass = hb_font_funcs_get_empty ();
+
+ 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)
+{
+ /* Destroy user_data? */
+ if (font->immutable) {
+ if (destroy)
+ destroy (user_data);
+ 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 18:46:17 +0000