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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/harfbuzz/src/hb-fallback-shape.cc
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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+/*
+ * Copyright © 2011 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.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#define HB_SHAPER fallback
+#include "hb-shaper-impl-private.hh"
+
+
+/*
+ * shaper face data
+ */
+
+struct hb_fallback_shaper_face_data_t {};
+
+hb_fallback_shaper_face_data_t *
+_hb_fallback_shaper_face_data_create (hb_face_t *face HB_UNUSED)
+{
+ return (hb_fallback_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED;
+}
+
+void
+_hb_fallback_shaper_face_data_destroy (hb_fallback_shaper_face_data_t *data HB_UNUSED)
+{
+}
+
+
+/*
+ * shaper font data
+ */
+
+struct hb_fallback_shaper_font_data_t {};
+
+hb_fallback_shaper_font_data_t *
+_hb_fallback_shaper_font_data_create (hb_font_t *font HB_UNUSED)
+{
+ return (hb_fallback_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
+}
+
+void
+_hb_fallback_shaper_font_data_destroy (hb_fallback_shaper_font_data_t *data HB_UNUSED)
+{
+}
+
+
+/*
+ * shaper shape_plan data
+ */
+
+struct hb_fallback_shaper_shape_plan_data_t {};
+
+hb_fallback_shaper_shape_plan_data_t *
+_hb_fallback_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
+ const hb_feature_t *user_features HB_UNUSED,
+ unsigned int num_user_features HB_UNUSED,
+ const int *coords HB_UNUSED,
+ unsigned int num_coords HB_UNUSED)
+{
+ return (hb_fallback_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
+}
+
+void
+_hb_fallback_shaper_shape_plan_data_destroy (hb_fallback_shaper_shape_plan_data_t *data HB_UNUSED)
+{
+}
+
+
+/*
+ * shaper
+ */
+
+hb_bool_t
+_hb_fallback_shape (hb_shape_plan_t *shape_plan HB_UNUSED,
+ hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features HB_UNUSED,
+ unsigned int num_features HB_UNUSED)
+{
+ /* TODO
+ *
+ * - Apply fallback kern.
+ * - Handle Variation Selectors?
+ * - Apply normalization?
+ *
+ * This will make the fallback shaper into a dumb "TrueType"
+ * shaper which many people unfortunately still request.
+ */
+
+ hb_codepoint_t space;
+ bool has_space = (bool) font->get_nominal_glyph (' ', &space);
+
+ buffer->clear_positions ();
+
+ hb_direction_t direction = buffer->props.direction;
+ hb_unicode_funcs_t *unicode = buffer->unicode;
+ unsigned int count = buffer->len;
+ hb_glyph_info_t *info = buffer->info;
+ hb_glyph_position_t *pos = buffer->pos;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ if (has_space && unicode->is_default_ignorable (info[i].codepoint)) {
+ info[i].codepoint = space;
+ pos[i].x_advance = 0;
+ pos[i].y_advance = 0;
+ continue;
+ }
+ font->get_nominal_glyph (info[i].codepoint, &info[i].codepoint);
+ font->get_glyph_advance_for_direction (info[i].codepoint,
+ direction,
+ &pos[i].x_advance,
+ &pos[i].y_advance);
+ font->subtract_glyph_origin_for_direction (info[i].codepoint,
+ direction,
+ &pos[i].x_offset,
+ &pos[i].y_offset);
+ }
+
+ if (HB_DIRECTION_IS_BACKWARD (direction))
+ hb_buffer_reverse (buffer);
+
+ return true;
+}