1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-old.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,410 @@
1.4 +/*
1.5 + * Copyright © 2012 Google, Inc.
1.6 + *
1.7 + * This is part of HarfBuzz, a text shaping library.
1.8 + *
1.9 + * Permission is hereby granted, without written agreement and without
1.10 + * license or royalty fees, to use, copy, modify, and distribute this
1.11 + * software and its documentation for any purpose, provided that the
1.12 + * above copyright notice and the following two paragraphs appear in
1.13 + * all copies of this software.
1.14 + *
1.15 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.16 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.17 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.18 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.19 + * DAMAGE.
1.20 + *
1.21 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.22 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.23 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.24 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.25 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.26 + *
1.27 + * Google Author(s): Behdad Esfahbod
1.28 + */
1.29 +
1.30 +#define HB_SHAPER old
1.31 +#define hb_old_shaper_face_data_t HB_FaceRec_
1.32 +#define hb_old_shaper_font_data_t HB_Font_
1.33 +#include "hb-shaper-impl-private.hh"
1.34 +
1.35 +#include <harfbuzz.h>
1.36 +
1.37 +
1.38 +#ifndef HB_DEBUG_OLD
1.39 +#define HB_DEBUG_OLD (HB_DEBUG+0)
1.40 +#endif
1.41 +
1.42 +
1.43 +static HB_Script
1.44 +hb_old_script_from_script (hb_script_t script)
1.45 +{
1.46 + switch ((hb_tag_t) script)
1.47 + {
1.48 + default:
1.49 + case HB_SCRIPT_COMMON: return HB_Script_Common;
1.50 + case HB_SCRIPT_GREEK: return HB_Script_Greek;
1.51 + case HB_SCRIPT_CYRILLIC: return HB_Script_Cyrillic;
1.52 + case HB_SCRIPT_ARMENIAN: return HB_Script_Armenian;
1.53 + case HB_SCRIPT_HEBREW: return HB_Script_Hebrew;
1.54 + case HB_SCRIPT_ARABIC: return HB_Script_Arabic;
1.55 + case HB_SCRIPT_SYRIAC: return HB_Script_Syriac;
1.56 + case HB_SCRIPT_THAANA: return HB_Script_Thaana;
1.57 + case HB_SCRIPT_DEVANAGARI: return HB_Script_Devanagari;
1.58 + case HB_SCRIPT_BENGALI: return HB_Script_Bengali;
1.59 + case HB_SCRIPT_GURMUKHI: return HB_Script_Gurmukhi;
1.60 + case HB_SCRIPT_GUJARATI: return HB_Script_Gujarati;
1.61 + case HB_SCRIPT_ORIYA: return HB_Script_Oriya;
1.62 + case HB_SCRIPT_TAMIL: return HB_Script_Tamil;
1.63 + case HB_SCRIPT_TELUGU: return HB_Script_Telugu;
1.64 + case HB_SCRIPT_KANNADA: return HB_Script_Kannada;
1.65 + case HB_SCRIPT_MALAYALAM: return HB_Script_Malayalam;
1.66 + case HB_SCRIPT_SINHALA: return HB_Script_Sinhala;
1.67 + case HB_SCRIPT_THAI: return HB_Script_Thai;
1.68 + case HB_SCRIPT_LAO: return HB_Script_Lao;
1.69 + case HB_SCRIPT_TIBETAN: return HB_Script_Tibetan;
1.70 + case HB_SCRIPT_MYANMAR: return HB_Script_Myanmar;
1.71 + case HB_SCRIPT_GEORGIAN: return HB_Script_Georgian;
1.72 + case HB_SCRIPT_HANGUL: return HB_Script_Hangul;
1.73 + case HB_SCRIPT_OGHAM: return HB_Script_Ogham;
1.74 + case HB_SCRIPT_RUNIC: return HB_Script_Runic;
1.75 + case HB_SCRIPT_KHMER: return HB_Script_Khmer;
1.76 + case HB_SCRIPT_NKO: return HB_Script_Nko;
1.77 + case HB_SCRIPT_INHERITED: return HB_Script_Inherited;
1.78 + }
1.79 +}
1.80 +
1.81 +
1.82 +static HB_Bool
1.83 +hb_old_convertStringToGlyphIndices (HB_Font old_font,
1.84 + const HB_UChar16 *string,
1.85 + hb_uint32 length,
1.86 + HB_Glyph *glyphs,
1.87 + hb_uint32 *numGlyphs,
1.88 + HB_Bool rightToLeft)
1.89 +{
1.90 + hb_font_t *font = (hb_font_t *) old_font->userData;
1.91 +
1.92 + for (unsigned int i = 0; i < length; i++)
1.93 + {
1.94 + hb_codepoint_t u;
1.95 +
1.96 + /* XXX Handle UTF-16. Ugh */
1.97 + u = string[i];
1.98 +
1.99 + if (rightToLeft)
1.100 + u = hb_unicode_funcs_get_default ()->mirroring (u);
1.101 +
1.102 + font->get_glyph (u, 0, &u); /* TODO Variation selectors */
1.103 +
1.104 + glyphs[i] = u;
1.105 + }
1.106 + *numGlyphs = length; /* XXX */
1.107 +
1.108 + return true;
1.109 +}
1.110 +
1.111 +static void
1.112 +hb_old_getGlyphAdvances (HB_Font old_font,
1.113 + const HB_Glyph *glyphs,
1.114 + hb_uint32 numGlyphs,
1.115 + HB_Fixed *advances,
1.116 + int flags /*HB_ShaperFlag*/ HB_UNUSED)
1.117 +{
1.118 + hb_font_t *font = (hb_font_t *) old_font->userData;
1.119 +
1.120 + for (unsigned int i = 0; i < numGlyphs; i++)
1.121 + advances[i] = font->get_glyph_h_advance (glyphs[i]);
1.122 +}
1.123 +
1.124 +static HB_Bool
1.125 +hb_old_canRender (HB_Font old_font,
1.126 + const HB_UChar16 *string,
1.127 + hb_uint32 length)
1.128 +{
1.129 + return true; /* TODO */
1.130 +}
1.131 +
1.132 +static HB_Error
1.133 +hb_old_getPointInOutline (HB_Font old_font,
1.134 + HB_Glyph glyph,
1.135 + int flags /*HB_ShaperFlag*/,
1.136 + hb_uint32 point,
1.137 + HB_Fixed *xpos,
1.138 + HB_Fixed *ypos,
1.139 + hb_uint32 *nPoints)
1.140 +{
1.141 + return HB_Err_Ok; /* TODO */
1.142 +}
1.143 +
1.144 +static void
1.145 +hb_old_getGlyphMetrics (HB_Font old_font,
1.146 + HB_Glyph glyph,
1.147 + HB_GlyphMetrics *metrics)
1.148 +{
1.149 + hb_font_t *font = (hb_font_t *) old_font->userData;
1.150 +
1.151 + hb_glyph_extents_t extents;
1.152 +
1.153 + font->get_glyph_extents (glyph, &extents);
1.154 +
1.155 + metrics->x = extents.x_bearing;
1.156 + metrics->y = extents.y_bearing;
1.157 + metrics->width = extents.width;
1.158 + metrics->height = extents.height;
1.159 + metrics->xOffset = font->get_glyph_h_advance (glyph);
1.160 + metrics->yOffset = 0;
1.161 +}
1.162 +
1.163 +static HB_Fixed
1.164 +hb_old_getFontMetric (HB_Font old_font,
1.165 + HB_FontMetric metric)
1.166 +{
1.167 + hb_font_t *font = (hb_font_t *) old_font->userData;
1.168 +
1.169 + switch (metric)
1.170 + {
1.171 + case HB_FontAscent:
1.172 + return font->y_scale; /* XXX We don't have ascent data yet. */
1.173 +
1.174 + default:
1.175 + return 0;
1.176 + }
1.177 +}
1.178 +
1.179 +static const HB_FontClass hb_old_font_class = {
1.180 + hb_old_convertStringToGlyphIndices,
1.181 + hb_old_getGlyphAdvances,
1.182 + hb_old_canRender,
1.183 + hb_old_getPointInOutline,
1.184 + hb_old_getGlyphMetrics,
1.185 + hb_old_getFontMetric
1.186 +};
1.187 +
1.188 +
1.189 +
1.190 +static HB_Error
1.191 +table_func (void *font, HB_Tag tag, HB_Byte *buffer, HB_UInt *length)
1.192 +{
1.193 + hb_face_t *face = (hb_face_t *) font;
1.194 + hb_blob_t *blob = face->reference_table ((hb_tag_t) tag);
1.195 + unsigned int capacity = *length;
1.196 + *length = hb_blob_get_length (blob);
1.197 + memcpy (buffer, hb_blob_get_data (blob, NULL), MIN (capacity, *length));
1.198 + hb_blob_destroy (blob);
1.199 + return HB_Err_Ok;
1.200 +}
1.201 +
1.202 +
1.203 +/*
1.204 + * shaper face data
1.205 + */
1.206 +
1.207 +hb_old_shaper_face_data_t *
1.208 +_hb_old_shaper_face_data_create (hb_face_t *face)
1.209 +{
1.210 + return HB_NewFace (face, table_func);
1.211 +}
1.212 +
1.213 +void
1.214 +_hb_old_shaper_face_data_destroy (hb_old_shaper_face_data_t *data)
1.215 +{
1.216 + HB_FreeFace (data);
1.217 +}
1.218 +
1.219 +
1.220 +/*
1.221 + * shaper font data
1.222 + */
1.223 +
1.224 +hb_old_shaper_font_data_t *
1.225 +_hb_old_shaper_font_data_create (hb_font_t *font)
1.226 +{
1.227 + HB_FontRec *data = (HB_FontRec *) calloc (1, sizeof (HB_FontRec));
1.228 + if (unlikely (!data)) {
1.229 + DEBUG_MSG (OLD, font, "malloc()ing HB_Font failed");
1.230 + return NULL;
1.231 + }
1.232 +
1.233 + data->klass = &hb_old_font_class;
1.234 + data->x_ppem = font->x_ppem;
1.235 + data->y_ppem = font->y_ppem;
1.236 + data->x_scale = font->x_scale; /* XXX */
1.237 + data->y_scale = font->y_scale; /* XXX */
1.238 + data->userData = font;
1.239 +
1.240 + return data;
1.241 +}
1.242 +
1.243 +void
1.244 +_hb_old_shaper_font_data_destroy (hb_old_shaper_font_data_t *data)
1.245 +{
1.246 + free (data);
1.247 +}
1.248 +
1.249 +
1.250 +/*
1.251 + * shaper shape_plan data
1.252 + */
1.253 +
1.254 +struct hb_old_shaper_shape_plan_data_t {};
1.255 +
1.256 +hb_old_shaper_shape_plan_data_t *
1.257 +_hb_old_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
1.258 + const hb_feature_t *user_features HB_UNUSED,
1.259 + unsigned int num_user_features HB_UNUSED)
1.260 +{
1.261 + return (hb_old_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
1.262 +}
1.263 +
1.264 +void
1.265 +_hb_old_shaper_shape_plan_data_destroy (hb_old_shaper_shape_plan_data_t *data HB_UNUSED)
1.266 +{
1.267 +}
1.268 +
1.269 +
1.270 +/*
1.271 + * shaper
1.272 + */
1.273 +
1.274 +hb_bool_t
1.275 +_hb_old_shape (hb_shape_plan_t *shape_plan HB_UNUSED,
1.276 + hb_font_t *font,
1.277 + hb_buffer_t *buffer,
1.278 + const hb_feature_t *features,
1.279 + unsigned int num_features)
1.280 +{
1.281 + hb_face_t *face = font->face;
1.282 + HB_Face old_face = HB_SHAPER_DATA_GET (face);
1.283 + HB_Font old_font = HB_SHAPER_DATA_GET (font);
1.284 +
1.285 + bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
1.286 +
1.287 +retry:
1.288 +
1.289 + unsigned int scratch_size;
1.290 + char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
1.291 +
1.292 +#define utf16_index() var1.u32
1.293 + HB_UChar16 *pchars = (HB_UChar16 *) scratch;
1.294 + unsigned int chars_len = 0;
1.295 + for (unsigned int i = 0; i < buffer->len; i++) {
1.296 + hb_codepoint_t c = buffer->info[i].codepoint;
1.297 + buffer->info[i].utf16_index() = chars_len;
1.298 + if (likely (c < 0x10000))
1.299 + pchars[chars_len++] = c;
1.300 + else if (unlikely (c >= 0x110000))
1.301 + pchars[chars_len++] = 0xFFFD;
1.302 + else {
1.303 + pchars[chars_len++] = 0xD800 + ((c - 0x10000) >> 10);
1.304 + pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1));
1.305 + }
1.306 + }
1.307 +
1.308 +
1.309 +#define ALLOCATE_ARRAY(Type, name, len) \
1.310 + name = (Type *) scratch; \
1.311 + scratch += (len) * sizeof ((name)[0]); \
1.312 + scratch_size -= (len) * sizeof ((name)[0]);
1.313 +
1.314 +
1.315 + HB_ShaperItem item = {0};
1.316 +
1.317 + ALLOCATE_ARRAY (const HB_UChar16, item.string, chars_len);
1.318 + ALLOCATE_ARRAY (unsigned short, item.log_clusters, chars_len + 2);
1.319 + item.stringLength = chars_len;
1.320 + item.item.pos = 0;
1.321 + item.item.length = item.stringLength;
1.322 + item.item.script = hb_old_script_from_script (buffer->props.script);
1.323 + item.item.bidiLevel = backward ? 1 : 0;
1.324 +
1.325 + item.font = old_font;
1.326 + item.face = old_face;
1.327 + item.shaperFlags = 0;
1.328 +
1.329 + item.glyphIndicesPresent = false;
1.330 +
1.331 + /* TODO Alignment. */
1.332 + unsigned int num_glyphs = scratch_size / (sizeof (HB_Glyph) +
1.333 + sizeof (HB_GlyphAttributes) +
1.334 + sizeof (HB_Fixed) +
1.335 + sizeof (HB_FixedPoint) +
1.336 + sizeof (uint32_t));
1.337 +
1.338 + item.num_glyphs = num_glyphs;
1.339 + ALLOCATE_ARRAY (HB_Glyph, item.glyphs, num_glyphs);
1.340 + ALLOCATE_ARRAY (HB_GlyphAttributes, item.attributes, num_glyphs);
1.341 + ALLOCATE_ARRAY (HB_Fixed, item.advances, num_glyphs);
1.342 + ALLOCATE_ARRAY (HB_FixedPoint, item.offsets, num_glyphs);
1.343 + /* Apparently in some cases the offsets array will not be fully assigned to.
1.344 + * Clear it. */
1.345 + memset (item.offsets, 0, num_glyphs * sizeof (item.offsets[0]));
1.346 + uint32_t *vis_clusters;
1.347 + ALLOCATE_ARRAY (uint32_t, vis_clusters, num_glyphs);
1.348 +
1.349 +#undef ALLOCATE_ARRAY
1.350 +
1.351 + if (!HB_ShapeItem (&item))
1.352 + {
1.353 + if (unlikely (item.num_glyphs > num_glyphs))
1.354 + {
1.355 + buffer->ensure (buffer->allocated * 2);
1.356 + if (buffer->in_error)
1.357 + return false;
1.358 + goto retry;
1.359 + }
1.360 + return false;
1.361 + }
1.362 + num_glyphs = item.num_glyphs;
1.363 +
1.364 + /* Ok, we've got everything we need, now compose output buffer,
1.365 + * very, *very*, carefully! */
1.366 +
1.367 + /* Calculate visual-clusters. That's what we ship. */
1.368 + for (unsigned int i = 0; i < num_glyphs; i++)
1.369 + vis_clusters[i] = -1;
1.370 + for (unsigned int i = 0; i < buffer->len; i++) {
1.371 + uint32_t *p = &vis_clusters[item.log_clusters[buffer->info[i].utf16_index()]];
1.372 + *p = MIN (*p, buffer->info[i].cluster);
1.373 + }
1.374 + for (unsigned int i = 1; i < num_glyphs; i++)
1.375 + if (vis_clusters[i] == (uint32_t) -1)
1.376 + vis_clusters[i] = vis_clusters[i - 1];
1.377 +
1.378 +#undef utf16_index
1.379 +
1.380 + buffer->ensure (num_glyphs);
1.381 + if (buffer->in_error)
1.382 + return false;
1.383 +
1.384 +
1.385 + buffer->len = num_glyphs;
1.386 + hb_glyph_info_t *info = buffer->info;
1.387 + for (unsigned int i = 0; i < num_glyphs; i++)
1.388 + {
1.389 + info[i].codepoint = item.glyphs[i];
1.390 + info[i].cluster = vis_clusters[i];
1.391 +
1.392 + info[i].mask = item.advances[i];
1.393 + info[i].var1.u32 = item.offsets[i].x;
1.394 + info[i].var2.u32 = item.offsets[i].y;
1.395 + }
1.396 +
1.397 + buffer->clear_positions ();
1.398 +
1.399 + for (unsigned int i = 0; i < num_glyphs; ++i) {
1.400 + hb_glyph_info_t *info = &buffer->info[i];
1.401 + hb_glyph_position_t *pos = &buffer->pos[i];
1.402 +
1.403 + /* TODO vertical */
1.404 + pos->x_advance = info->mask;
1.405 + pos->x_offset = info->var1.u32;
1.406 + pos->y_offset = info->var2.u32;
1.407 + }
1.408 +
1.409 + if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
1.410 + buffer->reverse ();
1.411 +
1.412 + return true;
1.413 +}
