The Tor Browser: comparison gfx/harfbuzz/src/hb-icu-le.cc

--1:000000000000
+:8455eb52c6de
+/*
+* 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.
+*
+* Google Author(s): Behdad Esfahbod
+*/
+#define HB_SHAPER icu_le
+#define hb_icu_le_shaper_font_data_t PortableFontInstance
+#include "hb-shaper-impl-private.hh"
+#include "hb-icu-le/PortableFontInstance.h"
+#include "layout/loengine.h"
+#include "unicode/unistr.h"
+#include "hb-icu.h"
+/*
+* shaper face data
+*/
+struct hb_icu_le_shaper_face_data_t {};
+hb_icu_le_shaper_face_data_t *
+_hb_icu_le_shaper_face_data_create (hb_face_t *face HB_UNUSED)
+{
+return (hb_icu_le_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED;
+}
+void
+_hb_icu_le_shaper_face_data_destroy (hb_icu_le_shaper_face_data_t *data HB_UNUSED)
+{
+}
+/*
+* shaper font data
+*/
+hb_icu_le_shaper_font_data_t *
+_hb_icu_le_shaper_font_data_create (hb_font_t *font)
+{
+LEErrorCode status = LE_NO_ERROR;
+hb_icu_le_shaper_font_data_t *data = new PortableFontInstance (font->face,
+								 font->x_scale,
+								 font->y_scale,
+								 status);
+if (status != LE_NO_ERROR) {
+delete (data);
+return NULL;
+}
+return data;
+}
+void
+_hb_icu_le_shaper_font_data_destroy (hb_icu_le_shaper_font_data_t *data)
+{
+delete (data);
+}
+/*
+* shaper shape_plan data
+*/
+struct hb_icu_le_shaper_shape_plan_data_t {};
+hb_icu_le_shaper_shape_plan_data_t *
+_hb_icu_le_shaper_shape_plan_data_create (hb_shape_plan_t    *shape_plan HB_UNUSED,
+					  const hb_feature_t *user_features,
+					  unsigned int        num_user_features)
+{
+return (hb_icu_le_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
+}
+void
+_hb_icu_le_shaper_shape_plan_data_destroy (hb_icu_le_shaper_shape_plan_data_t *data)
+{
+}
+/*
+* shaper
+*/
+hb_bool_t
+_hb_icu_le_shape (hb_shape_plan_t    *shape_plan,
+		  hb_font_t          *font,
+		  hb_buffer_t        *buffer,
+		  const hb_feature_t *features,
+		  unsigned int        num_features)
+{
+LEFontInstance *font_instance = HB_SHAPER_DATA_GET (font);
+le_int32 script_code = hb_icu_script_from_script (shape_plan->props.script);
+le_int32 language_code = -1 /* TODO */;
+le_int32 typography_flags = 3; /* Needed for ligatures and kerning */
+LEErrorCode status = LE_NO_ERROR;
+le_engine *le = le_create ((const le_font *) font_instance,
+			     script_code,
+			     language_code,
+			     typography_flags,
+			     &status);
+if (status != LE_NO_ERROR)
+{ le_close (le); return false; }
+retry:
+unsigned int scratch_size;
+char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
+#define ALLOCATE_ARRAY(Type, name, len) \
+Type *name = (Type *) scratch; \
+scratch += (len) * sizeof ((name)[0]); \
+scratch_size -= (len) * sizeof ((name)[0]);
+ALLOCATE_ARRAY (LEUnicode, chars, buffer->len);
+ALLOCATE_ARRAY (unsigned int, clusters, buffer->len);
+/* XXX Use UTF-16 decoder! */
+for (unsigned int i = 0; i < buffer->len; i++) {
+chars[i] = buffer->info[i].codepoint;
+clusters[i] = buffer->info[i].cluster;
+}
+unsigned int glyph_count = le_layoutChars (le,
+					     chars,
+					     0,
+					     buffer->len,
+					     buffer->len,
+					     HB_DIRECTION_IS_BACKWARD (buffer->props.direction),
+					     0., 0.,
+					     &status);
+if (status != LE_NO_ERROR)
+{ le_close (le); return false; }
+unsigned int num_glyphs = scratch_size / (sizeof (LEGlyphID) +
+					    sizeof (le_int32) +
+					    sizeof (float) * 2);
+if (unlikely (glyph_count >= num_glyphs || glyph_count > buffer->allocated)) {
+buffer->ensure (buffer->allocated * 2);
+if (buffer->in_error)
+{ le_close (le); return false; }
+goto retry;
+}
+ALLOCATE_ARRAY (LEGlyphID, glyphs, glyph_count);
+ALLOCATE_ARRAY (le_int32, indices, glyph_count);
+ALLOCATE_ARRAY (float, positions, glyph_count * 2 + 2);
+le_getGlyphs (le, glyphs, &status);
+le_getCharIndices (le, indices, &status);
+le_getGlyphPositions (le, positions, &status);
+#undef ALLOCATE_ARRAY
+/* Ok, we've got everything we need, now compose output buffer,
+* very, *very*, carefully! */
+unsigned int j = 0;
+hb_glyph_info_t *info = buffer->info;
+for (unsigned int i = 0; i < glyph_count; i++)
+{
+if (glyphs[i] >= 0xFFFE)
+	continue;
+info[j].codepoint = glyphs[i];
+info[j].cluster = clusters[indices[i]];
+/* icu-le doesn't seem to have separate advance values. */
+info[j].mask = positions[2 * i + 2] - positions[2 * i];
+info[j].var1.u32 = 0;
+info[j].var2.u32 = -positions[2 * i + 1];
+j++;
+}
+buffer->len = j;
+buffer->clear_positions ();
+for (unsigned int i = 0; i < buffer->len; i++) {
+hb_glyph_info_t *info = &buffer->info[i];
+hb_glyph_position_t *pos = &buffer->pos[i];
+/* TODO vertical */
+pos->x_advance = info->mask;
+pos->x_offset = info->var1.u32;
+pos->y_offset = info->var2.u32;
+}
+le_close (le);
+return true;
+}

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comparison: gfx/harfbuzz/src/hb-icu-le.cc

gfx/harfbuzz/src/hb-icu-le.cc