Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 8 | #include "include/core/SkFont.h" |
| 9 | #include "include/core/SkFontArguments.h" |
| 10 | #include "include/core/SkFontMetrics.h" |
| 11 | #include "include/core/SkFontMgr.h" |
| 12 | #include "include/core/SkFontTypes.h" |
| 13 | #include "include/core/SkPaint.h" |
| 14 | #include "include/core/SkPoint.h" |
| 15 | #include "include/core/SkRect.h" |
| 16 | #include "include/core/SkRefCnt.h" |
| 17 | #include "include/core/SkScalar.h" |
| 18 | #include "include/core/SkStream.h" |
| 19 | #include "include/core/SkTypeface.h" |
| 20 | #include "include/core/SkTypes.h" |
| 21 | #include "include/private/SkBitmaskEnum.h" |
| 22 | #include "include/private/SkMalloc.h" |
| 23 | #include "include/private/SkTArray.h" |
| 24 | #include "include/private/SkTFitsIn.h" |
| 25 | #include "include/private/SkTemplates.h" |
| 26 | #include "include/private/SkTo.h" |
| 27 | #include "modules/skshaper/include/SkShaper.h" |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 28 | #include "src/core/SkSpan.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 29 | #include "src/core/SkTDPQueue.h" |
| 30 | #include "src/utils/SkUTF.h" |
Ben Wagner | 1777424 | 2018-08-07 14:31:33 -0400 | [diff] [blame] | 31 | |
| 32 | #include <hb.h> |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 33 | #include <hb-icu.h> |
Ben Wagner | 1777424 | 2018-08-07 14:31:33 -0400 | [diff] [blame] | 34 | #include <hb-ot.h> |
Ben Wagner | 1777424 | 2018-08-07 14:31:33 -0400 | [diff] [blame] | 35 | #include <unicode/ubidi.h> |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 36 | #include <unicode/ubrk.h> |
| 37 | #include <unicode/umachine.h> |
Ben Wagner | 1777424 | 2018-08-07 14:31:33 -0400 | [diff] [blame] | 38 | #include <unicode/urename.h> |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 39 | #include <unicode/uscript.h> |
| 40 | #include <unicode/ustring.h> |
Ben Wagner | 1777424 | 2018-08-07 14:31:33 -0400 | [diff] [blame] | 41 | #include <unicode/utext.h> |
| 42 | #include <unicode/utypes.h> |
| 43 | |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 44 | #include <cstring> |
Ben Wagner | 1777424 | 2018-08-07 14:31:33 -0400 | [diff] [blame] | 45 | #include <memory> |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 46 | #include <type_traits> |
Ben Wagner | 1777424 | 2018-08-07 14:31:33 -0400 | [diff] [blame] | 47 | #include <utility> |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 48 | |
Hal Canary | 6102192 | 2019-02-06 12:29:11 -0500 | [diff] [blame] | 49 | #if defined(SK_USING_THIRD_PARTY_ICU) |
Hal Canary | 32498f0 | 2019-02-04 15:36:31 -0500 | [diff] [blame] | 50 | #include "SkLoadICU.h" |
Hal Canary | 6102192 | 2019-02-06 12:29:11 -0500 | [diff] [blame] | 51 | #endif |
Hal Canary | 32498f0 | 2019-02-04 15:36:31 -0500 | [diff] [blame] | 52 | |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 53 | // HB_FEATURE_GLOBAL_START and HB_FEATURE_GLOBAL_END were not added until HarfBuzz 2.0 |
| 54 | // They would have always worked, they just hadn't been named yet. |
| 55 | #if !defined(HB_FEATURE_GLOBAL_START) |
| 56 | # define HB_FEATURE_GLOBAL_START 0 |
| 57 | #endif |
| 58 | #if !defined(HB_FEATURE_GLOBAL_END) |
| 59 | # define HB_FEATURE_GLOBAL_END ((unsigned int) -1) |
| 60 | #endif |
| 61 | |
Ben Wagner | 2fc1474 | 2019-02-06 16:37:44 -0500 | [diff] [blame] | 62 | namespace skstd { |
| 63 | template <> struct is_bitmask_enum<hb_buffer_flags_t> : std::true_type {}; |
| 64 | } |
| 65 | |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 66 | namespace { |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 67 | template <typename T,typename P,P* p> using resource = std::unique_ptr<T, SkFunctionWrapper<P, p>>; |
| 68 | using HBBlob = resource<hb_blob_t , decltype(hb_blob_destroy) , hb_blob_destroy >; |
| 69 | using HBFace = resource<hb_face_t , decltype(hb_face_destroy) , hb_face_destroy >; |
| 70 | using HBFont = resource<hb_font_t , decltype(hb_font_destroy) , hb_font_destroy >; |
| 71 | using HBBuffer = resource<hb_buffer_t , decltype(hb_buffer_destroy), hb_buffer_destroy>; |
| 72 | using ICUBiDi = resource<UBiDi , decltype(ubidi_close) , ubidi_close >; |
| 73 | using ICUBrk = resource<UBreakIterator, decltype(ubrk_close) , ubrk_close >; |
| 74 | using ICUUText = resource<UText , decltype(utext_close) , utext_close >; |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 75 | |
| 76 | HBBlob stream_to_blob(std::unique_ptr<SkStreamAsset> asset) { |
| 77 | size_t size = asset->getLength(); |
| 78 | HBBlob blob; |
| 79 | if (const void* base = asset->getMemoryBase()) { |
| 80 | blob.reset(hb_blob_create((char*)base, SkToUInt(size), |
| 81 | HB_MEMORY_MODE_READONLY, asset.release(), |
| 82 | [](void* p) { delete (SkStreamAsset*)p; })); |
| 83 | } else { |
| 84 | // SkDebugf("Extra SkStreamAsset copy\n"); |
| 85 | void* ptr = size ? sk_malloc_throw(size) : nullptr; |
| 86 | asset->read(ptr, size); |
| 87 | blob.reset(hb_blob_create((char*)ptr, SkToUInt(size), |
| 88 | HB_MEMORY_MODE_READONLY, ptr, sk_free)); |
| 89 | } |
| 90 | SkASSERT(blob); |
| 91 | hb_blob_make_immutable(blob.get()); |
| 92 | return blob; |
| 93 | } |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 94 | |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 95 | hb_position_t skhb_position(SkScalar value) { |
| 96 | // Treat HarfBuzz hb_position_t as 16.16 fixed-point. |
| 97 | constexpr int kHbPosition1 = 1 << 16; |
| 98 | return SkScalarRoundToInt(value * kHbPosition1); |
| 99 | } |
| 100 | |
| 101 | hb_bool_t skhb_glyph(hb_font_t* hb_font, |
| 102 | void* font_data, |
| 103 | hb_codepoint_t unicode, |
| 104 | hb_codepoint_t variation_selector, |
| 105 | hb_codepoint_t* glyph, |
| 106 | void* user_data) { |
| 107 | SkFont& font = *reinterpret_cast<SkFont*>(font_data); |
| 108 | |
| 109 | *glyph = font.unicharToGlyph(unicode); |
| 110 | return *glyph != 0; |
| 111 | } |
| 112 | |
| 113 | hb_bool_t skhb_nominal_glyph(hb_font_t* hb_font, |
| 114 | void* font_data, |
| 115 | hb_codepoint_t unicode, |
| 116 | hb_codepoint_t* glyph, |
| 117 | void* user_data) { |
| 118 | return skhb_glyph(hb_font, font_data, unicode, 0, glyph, user_data); |
| 119 | } |
| 120 | |
| 121 | unsigned skhb_nominal_glyphs(hb_font_t *hb_font, void *font_data, |
| 122 | unsigned int count, |
| 123 | const hb_codepoint_t *unicodes, |
| 124 | unsigned int unicode_stride, |
| 125 | hb_codepoint_t *glyphs, |
| 126 | unsigned int glyph_stride, |
| 127 | void *user_data) { |
| 128 | SkFont& font = *reinterpret_cast<SkFont*>(font_data); |
| 129 | |
| 130 | // Batch call textToGlyphs since entry cost is not cheap. |
| 131 | // Copy requred because textToGlyphs is dense and hb is strided. |
| 132 | SkAutoSTMalloc<256, SkUnichar> unicode(count); |
| 133 | for (unsigned i = 0; i < count; i++) { |
| 134 | unicode[i] = *unicodes; |
| 135 | unicodes = SkTAddOffset<const hb_codepoint_t>(unicodes, unicode_stride); |
| 136 | } |
| 137 | SkAutoSTMalloc<256, SkGlyphID> glyph(count); |
Ben Wagner | 51e15a6 | 2019-05-07 15:38:46 -0400 | [diff] [blame] | 138 | font.textToGlyphs(unicode.get(), count * sizeof(SkUnichar), SkTextEncoding::kUTF32, |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 139 | glyph.get(), count); |
| 140 | |
| 141 | // Copy the results back to the sparse array. |
Ben Wagner | bedbb07 | 2019-07-31 15:21:03 -0400 | [diff] [blame] | 142 | unsigned int done; |
| 143 | for (done = 0; done < count && glyph[done] != 0; done++) { |
| 144 | *glyphs = glyph[done]; |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 145 | glyphs = SkTAddOffset<hb_codepoint_t>(glyphs, glyph_stride); |
| 146 | } |
Ben Wagner | bedbb07 | 2019-07-31 15:21:03 -0400 | [diff] [blame] | 147 | // return 'done' to allow HarfBuzz to synthesize with NFC and spaces, return 'count' to avoid |
| 148 | return done; |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | hb_position_t skhb_glyph_h_advance(hb_font_t* hb_font, |
| 152 | void* font_data, |
Ben Wagner | 32b45b3 | 2020-01-22 13:47:07 -0500 | [diff] [blame^] | 153 | hb_codepoint_t hbGlyph, |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 154 | void* user_data) { |
| 155 | SkFont& font = *reinterpret_cast<SkFont*>(font_data); |
| 156 | |
| 157 | SkScalar advance; |
Ben Wagner | 32b45b3 | 2020-01-22 13:47:07 -0500 | [diff] [blame^] | 158 | SkGlyphID skGlyph = SkTo<SkGlyphID>(hbGlyph); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 159 | |
Ben Wagner | 32b45b3 | 2020-01-22 13:47:07 -0500 | [diff] [blame^] | 160 | font.getWidths(&skGlyph, 1, &advance); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 161 | if (!font.isSubpixel()) { |
| 162 | advance = SkScalarRoundToInt(advance); |
| 163 | } |
| 164 | return skhb_position(advance); |
| 165 | } |
| 166 | |
| 167 | void skhb_glyph_h_advances(hb_font_t* hb_font, |
| 168 | void* font_data, |
| 169 | unsigned count, |
| 170 | const hb_codepoint_t* glyphs, |
| 171 | unsigned int glyph_stride, |
| 172 | hb_position_t* advances, |
| 173 | unsigned int advance_stride, |
| 174 | void* user_data) { |
| 175 | SkFont& font = *reinterpret_cast<SkFont*>(font_data); |
| 176 | |
| 177 | // Batch call getWidths since entry cost is not cheap. |
| 178 | // Copy requred because getWidths is dense and hb is strided. |
| 179 | SkAutoSTMalloc<256, SkGlyphID> glyph(count); |
| 180 | for (unsigned i = 0; i < count; i++) { |
| 181 | glyph[i] = *glyphs; |
| 182 | glyphs = SkTAddOffset<const hb_codepoint_t>(glyphs, glyph_stride); |
| 183 | } |
| 184 | SkAutoSTMalloc<256, SkScalar> advance(count); |
| 185 | font.getWidths(glyph.get(), count, advance.get()); |
| 186 | |
| 187 | if (!font.isSubpixel()) { |
| 188 | for (unsigned i = 0; i < count; i++) { |
| 189 | advance[i] = SkScalarRoundToInt(advance[i]); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | // Copy the results back to the sparse array. |
| 194 | for (unsigned i = 0; i < count; i++) { |
| 195 | *advances = skhb_position(advance[i]); |
| 196 | advances = SkTAddOffset<hb_position_t>(advances, advance_stride); |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | // HarfBuzz callback to retrieve glyph extents, mainly used by HarfBuzz for |
| 201 | // fallback mark positioning, i.e. the situation when the font does not have |
| 202 | // mark anchors or other mark positioning rules, but instead HarfBuzz is |
| 203 | // supposed to heuristically place combining marks around base glyphs. HarfBuzz |
| 204 | // does this by measuring "ink boxes" of glyphs, and placing them according to |
| 205 | // Unicode mark classes. Above, below, centered or left or right, etc. |
| 206 | hb_bool_t skhb_glyph_extents(hb_font_t* hb_font, |
| 207 | void* font_data, |
Ben Wagner | 32b45b3 | 2020-01-22 13:47:07 -0500 | [diff] [blame^] | 208 | hb_codepoint_t hbGlyph, |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 209 | hb_glyph_extents_t* extents, |
| 210 | void* user_data) { |
| 211 | SkFont& font = *reinterpret_cast<SkFont*>(font_data); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 212 | SkASSERT(extents); |
| 213 | |
| 214 | SkRect sk_bounds; |
Ben Wagner | 32b45b3 | 2020-01-22 13:47:07 -0500 | [diff] [blame^] | 215 | SkGlyphID skGlyph = SkTo<SkGlyphID>(hbGlyph); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 216 | |
Ben Wagner | 32b45b3 | 2020-01-22 13:47:07 -0500 | [diff] [blame^] | 217 | font.getWidths(&skGlyph, 1, nullptr, &sk_bounds); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 218 | if (!font.isSubpixel()) { |
| 219 | sk_bounds.set(sk_bounds.roundOut()); |
| 220 | } |
| 221 | |
| 222 | // Skia is y-down but HarfBuzz is y-up. |
| 223 | extents->x_bearing = skhb_position(sk_bounds.fLeft); |
| 224 | extents->y_bearing = skhb_position(-sk_bounds.fTop); |
| 225 | extents->width = skhb_position(sk_bounds.width()); |
| 226 | extents->height = skhb_position(-sk_bounds.height()); |
| 227 | return true; |
| 228 | } |
| 229 | |
Kevin Lubick | 867da4b | 2019-02-22 15:55:39 -0500 | [diff] [blame] | 230 | #define SK_HB_VERSION_CHECK(x, y, z) \ |
| 231 | (HB_VERSION_MAJOR > (x)) || \ |
| 232 | (HB_VERSION_MAJOR == (x) && HB_VERSION_MINOR > (y)) || \ |
| 233 | (HB_VERSION_MAJOR == (x) && HB_VERSION_MINOR == (y) && HB_VERSION_MICRO >= (z)) |
| 234 | |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 235 | hb_font_funcs_t* skhb_get_font_funcs() { |
| 236 | static hb_font_funcs_t* const funcs = []{ |
| 237 | // HarfBuzz will use the default (parent) implementation if they aren't set. |
| 238 | hb_font_funcs_t* const funcs = hb_font_funcs_create(); |
| 239 | hb_font_funcs_set_variation_glyph_func(funcs, skhb_glyph, nullptr, nullptr); |
| 240 | hb_font_funcs_set_nominal_glyph_func(funcs, skhb_nominal_glyph, nullptr, nullptr); |
Kevin Lubick | 867da4b | 2019-02-22 15:55:39 -0500 | [diff] [blame] | 241 | #if SK_HB_VERSION_CHECK(2, 0, 0) |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 242 | hb_font_funcs_set_nominal_glyphs_func(funcs, skhb_nominal_glyphs, nullptr, nullptr); |
Kevin Lubick | 867da4b | 2019-02-22 15:55:39 -0500 | [diff] [blame] | 243 | #else |
| 244 | sk_ignore_unused_variable(skhb_nominal_glyphs); |
| 245 | #endif |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 246 | hb_font_funcs_set_glyph_h_advance_func(funcs, skhb_glyph_h_advance, nullptr, nullptr); |
Kevin Lubick | 867da4b | 2019-02-22 15:55:39 -0500 | [diff] [blame] | 247 | #if SK_HB_VERSION_CHECK(1, 8, 6) |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 248 | hb_font_funcs_set_glyph_h_advances_func(funcs, skhb_glyph_h_advances, nullptr, nullptr); |
Kevin Lubick | 867da4b | 2019-02-22 15:55:39 -0500 | [diff] [blame] | 249 | #else |
| 250 | sk_ignore_unused_variable(skhb_glyph_h_advances); |
| 251 | #endif |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 252 | hb_font_funcs_set_glyph_extents_func(funcs, skhb_glyph_extents, nullptr, nullptr); |
| 253 | hb_font_funcs_make_immutable(funcs); |
| 254 | return funcs; |
| 255 | }(); |
| 256 | SkASSERT(funcs); |
| 257 | return funcs; |
| 258 | } |
| 259 | |
| 260 | hb_blob_t* skhb_get_table(hb_face_t* face, hb_tag_t tag, void* user_data) { |
| 261 | SkTypeface& typeface = *reinterpret_cast<SkTypeface*>(user_data); |
| 262 | |
Mike Reed | 6d907fa | 2019-07-24 14:51:34 -0400 | [diff] [blame] | 263 | auto data = typeface.copyTableData(tag); |
| 264 | if (!data) { |
Hal Canary | 0dfa208 | 2018-10-31 13:02:49 -0400 | [diff] [blame] | 265 | return nullptr; |
| 266 | } |
Mike Reed | 6d907fa | 2019-07-24 14:51:34 -0400 | [diff] [blame] | 267 | SkData* rawData = data.release(); |
| 268 | return hb_blob_create(reinterpret_cast<char*>(rawData->writable_data()), rawData->size(), |
| 269 | HB_MEMORY_MODE_WRITABLE, rawData, [](void* ctx) { |
Ben Wagner | 89e1f60 | 2019-09-27 17:02:53 -0400 | [diff] [blame] | 270 | SkSafeUnref(((SkData*)ctx)); |
Mike Reed | 6d907fa | 2019-07-24 14:51:34 -0400 | [diff] [blame] | 271 | }); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | HBFont create_hb_font(const SkFont& font) { |
Ben Wagner | e8db325 | 2019-05-29 18:54:26 -0400 | [diff] [blame] | 275 | SkASSERT(font.getTypeface()); |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 276 | int index; |
Ben Wagner | ff84d8a | 2019-02-26 15:39:41 -0500 | [diff] [blame] | 277 | std::unique_ptr<SkStreamAsset> typefaceAsset = font.getTypeface()->openStream(&index); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 278 | HBFace face; |
Hal Canary | ddef43f | 2018-11-16 10:53:51 -0500 | [diff] [blame] | 279 | if (!typefaceAsset) { |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 280 | face.reset(hb_face_create_for_tables( |
| 281 | skhb_get_table, |
| 282 | reinterpret_cast<void *>(font.refTypeface().release()), |
| 283 | [](void* user_data){ SkSafeUnref(reinterpret_cast<SkTypeface*>(user_data)); })); |
| 284 | } else { |
| 285 | HBBlob blob(stream_to_blob(std::move(typefaceAsset))); |
| 286 | face.reset(hb_face_create(blob.get(), (unsigned)index)); |
Hal Canary | ddef43f | 2018-11-16 10:53:51 -0500 | [diff] [blame] | 287 | } |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 288 | SkASSERT(face); |
| 289 | if (!face) { |
Ben Wagner | e000173 | 2017-08-31 16:26:26 -0400 | [diff] [blame] | 290 | return nullptr; |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 291 | } |
| 292 | hb_face_set_index(face.get(), (unsigned)index); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 293 | hb_face_set_upem(face.get(), font.getTypeface()->getUnitsPerEm()); |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 294 | |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 295 | HBFont otFont(hb_font_create(face.get())); |
| 296 | SkASSERT(otFont); |
| 297 | if (!otFont) { |
Ben Wagner | e000173 | 2017-08-31 16:26:26 -0400 | [diff] [blame] | 298 | return nullptr; |
| 299 | } |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 300 | hb_ot_font_set_funcs(otFont.get()); |
| 301 | int axis_count = font.getTypeface()->getVariationDesignPosition(nullptr, 0); |
Ben Wagner | e000173 | 2017-08-31 16:26:26 -0400 | [diff] [blame] | 302 | if (axis_count > 0) { |
| 303 | SkAutoSTMalloc<4, SkFontArguments::VariationPosition::Coordinate> axis_values(axis_count); |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 304 | if (font.getTypeface()->getVariationDesignPosition(axis_values, axis_count) == axis_count) { |
| 305 | hb_font_set_variations(otFont.get(), |
Ben Wagner | e000173 | 2017-08-31 16:26:26 -0400 | [diff] [blame] | 306 | reinterpret_cast<hb_variation_t*>(axis_values.get()), |
| 307 | axis_count); |
| 308 | } |
| 309 | } |
Ben Wagner | f61c936 | 2019-02-13 12:01:45 -0500 | [diff] [blame] | 310 | |
| 311 | // Creating a sub font means that non-available functions |
| 312 | // are found from the parent. |
| 313 | HBFont skFont(hb_font_create_sub_font(otFont.get())); |
| 314 | hb_font_set_funcs(skFont.get(), skhb_get_font_funcs(), |
| 315 | reinterpret_cast<void *>(new SkFont(font)), |
| 316 | [](void* user_data){ delete reinterpret_cast<SkFont*>(user_data); }); |
| 317 | int scale = skhb_position(font.getSize()); |
| 318 | hb_font_set_scale(skFont.get(), scale, scale); |
| 319 | |
| 320 | return skFont; |
Ben Wagner | e000173 | 2017-08-31 16:26:26 -0400 | [diff] [blame] | 321 | } |
| 322 | |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 323 | /** Replaces invalid utf-8 sequences with REPLACEMENT CHARACTER U+FFFD. */ |
Hal Canary | f107a2f | 2018-07-25 16:52:48 -0400 | [diff] [blame] | 324 | static inline SkUnichar utf8_next(const char** ptr, const char* end) { |
| 325 | SkUnichar val = SkUTF::NextUTF8(ptr, end); |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 326 | return val < 0 ? 0xFFFD : val; |
Hal Canary | f107a2f | 2018-07-25 16:52:48 -0400 | [diff] [blame] | 327 | } |
| 328 | |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 329 | class IcuBiDiRunIterator final : public SkShaper::BiDiRunIterator { |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 330 | public: |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 331 | IcuBiDiRunIterator(const char* utf8, const char* end, ICUBiDi bidi) |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 332 | : fBidi(std::move(bidi)) |
| 333 | , fEndOfCurrentRun(utf8) |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 334 | , fBegin(utf8) |
| 335 | , fEnd(end) |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 336 | , fUTF16LogicalPosition(0) |
| 337 | , fLevel(UBIDI_DEFAULT_LTR) |
| 338 | {} |
| 339 | void consume() override { |
| 340 | SkASSERT(fUTF16LogicalPosition < ubidi_getLength(fBidi.get())); |
| 341 | int32_t endPosition = ubidi_getLength(fBidi.get()); |
| 342 | fLevel = ubidi_getLevelAt(fBidi.get(), fUTF16LogicalPosition); |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 343 | SkUnichar u = utf8_next(&fEndOfCurrentRun, fEnd); |
Hal Canary | f107a2f | 2018-07-25 16:52:48 -0400 | [diff] [blame] | 344 | fUTF16LogicalPosition += SkUTF::ToUTF16(u); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 345 | UBiDiLevel level; |
| 346 | while (fUTF16LogicalPosition < endPosition) { |
| 347 | level = ubidi_getLevelAt(fBidi.get(), fUTF16LogicalPosition); |
| 348 | if (level != fLevel) { |
| 349 | break; |
| 350 | } |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 351 | u = utf8_next(&fEndOfCurrentRun, fEnd); |
Julia Lavrova | 526df26 | 2019-08-21 17:49:44 -0400 | [diff] [blame] | 352 | |
Hal Canary | f107a2f | 2018-07-25 16:52:48 -0400 | [diff] [blame] | 353 | fUTF16LogicalPosition += SkUTF::ToUTF16(u); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 354 | } |
| 355 | } |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 356 | size_t endOfCurrentRun() const override { |
| 357 | return fEndOfCurrentRun - fBegin; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 358 | } |
| 359 | bool atEnd() const override { |
| 360 | return fUTF16LogicalPosition == ubidi_getLength(fBidi.get()); |
| 361 | } |
| 362 | |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 363 | UBiDiLevel currentLevel() const override { |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 364 | return fLevel; |
| 365 | } |
| 366 | private: |
| 367 | ICUBiDi fBidi; |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 368 | char const * fEndOfCurrentRun; |
| 369 | char const * const fBegin; |
| 370 | char const * const fEnd; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 371 | int32_t fUTF16LogicalPosition; |
| 372 | UBiDiLevel fLevel; |
| 373 | }; |
| 374 | |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 375 | class HbIcuScriptRunIterator final : public SkShaper::ScriptRunIterator { |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 376 | public: |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 377 | HbIcuScriptRunIterator(const char* utf8, size_t utf8Bytes) |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 378 | : fCurrent(utf8), fBegin(utf8), fEnd(fCurrent + utf8Bytes) |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 379 | , fCurrentScript(HB_SCRIPT_UNKNOWN) |
| 380 | {} |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 381 | static hb_script_t hb_script_from_icu(SkUnichar u) { |
| 382 | UErrorCode status = U_ZERO_ERROR; |
| 383 | UScriptCode scriptCode = uscript_getScript(u, &status); |
| 384 | |
| 385 | if (U_FAILURE (status)) { |
| 386 | return HB_SCRIPT_UNKNOWN; |
| 387 | } |
| 388 | |
| 389 | return hb_icu_script_to_script(scriptCode); |
| 390 | } |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 391 | void consume() override { |
| 392 | SkASSERT(fCurrent < fEnd); |
Hal Canary | f107a2f | 2018-07-25 16:52:48 -0400 | [diff] [blame] | 393 | SkUnichar u = utf8_next(&fCurrent, fEnd); |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 394 | fCurrentScript = hb_script_from_icu(u); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 395 | while (fCurrent < fEnd) { |
| 396 | const char* prev = fCurrent; |
Hal Canary | f107a2f | 2018-07-25 16:52:48 -0400 | [diff] [blame] | 397 | u = utf8_next(&fCurrent, fEnd); |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 398 | const hb_script_t script = hb_script_from_icu(u); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 399 | if (script != fCurrentScript) { |
| 400 | if (fCurrentScript == HB_SCRIPT_INHERITED || fCurrentScript == HB_SCRIPT_COMMON) { |
| 401 | fCurrentScript = script; |
| 402 | } else if (script == HB_SCRIPT_INHERITED || script == HB_SCRIPT_COMMON) { |
| 403 | continue; |
| 404 | } else { |
| 405 | fCurrent = prev; |
| 406 | break; |
| 407 | } |
| 408 | } |
| 409 | } |
| 410 | if (fCurrentScript == HB_SCRIPT_INHERITED) { |
| 411 | fCurrentScript = HB_SCRIPT_COMMON; |
| 412 | } |
| 413 | } |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 414 | size_t endOfCurrentRun() const override { |
| 415 | return fCurrent - fBegin; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 416 | } |
| 417 | bool atEnd() const override { |
| 418 | return fCurrent == fEnd; |
| 419 | } |
| 420 | |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 421 | SkFourByteTag currentScript() const override { |
| 422 | return SkSetFourByteTag(HB_UNTAG(fCurrentScript)); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 423 | } |
| 424 | private: |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 425 | char const * fCurrent; |
| 426 | char const * const fBegin; |
| 427 | char const * const fEnd; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 428 | hb_script_t fCurrentScript; |
| 429 | }; |
| 430 | |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 431 | class RunIteratorQueue { |
| 432 | public: |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 433 | void insert(SkShaper::RunIterator* runIterator, int priority) { |
| 434 | fEntries.insert({runIterator, priority}); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | bool advanceRuns() { |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 438 | const SkShaper::RunIterator* leastRun = fEntries.peek().runIterator; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 439 | if (leastRun->atEnd()) { |
| 440 | SkASSERT(this->allRunsAreAtEnd()); |
| 441 | return false; |
| 442 | } |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 443 | const size_t leastEnd = leastRun->endOfCurrentRun(); |
| 444 | SkShaper::RunIterator* currentRun = nullptr; |
| 445 | SkDEBUGCODE(size_t previousEndOfCurrentRun); |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 446 | while ((currentRun = fEntries.peek().runIterator)->endOfCurrentRun() <= leastEnd) { |
| 447 | int priority = fEntries.peek().priority; |
| 448 | fEntries.pop(); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 449 | SkDEBUGCODE(previousEndOfCurrentRun = currentRun->endOfCurrentRun()); |
| 450 | currentRun->consume(); |
| 451 | SkASSERT(previousEndOfCurrentRun < currentRun->endOfCurrentRun()); |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 452 | fEntries.insert({currentRun, priority}); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 453 | } |
| 454 | return true; |
| 455 | } |
| 456 | |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 457 | size_t endOfCurrentRun() const { |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 458 | return fEntries.peek().runIterator->endOfCurrentRun(); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | private: |
| 462 | bool allRunsAreAtEnd() const { |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 463 | for (int i = 0; i < fEntries.count(); ++i) { |
| 464 | if (!fEntries.at(i).runIterator->atEnd()) { |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 465 | return false; |
| 466 | } |
| 467 | } |
| 468 | return true; |
| 469 | } |
| 470 | |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 471 | struct Entry { |
| 472 | SkShaper::RunIterator* runIterator; |
| 473 | int priority; |
| 474 | }; |
| 475 | static bool CompareEntry(Entry const& a, Entry const& b) { |
| 476 | size_t aEnd = a.runIterator->endOfCurrentRun(); |
| 477 | size_t bEnd = b.runIterator->endOfCurrentRun(); |
| 478 | return aEnd < bEnd || (aEnd == bEnd && a.priority < b.priority); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 479 | } |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 480 | SkTDPQueue<Entry, CompareEntry> fEntries; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 481 | }; |
| 482 | |
| 483 | struct ShapedGlyph { |
| 484 | SkGlyphID fID; |
| 485 | uint32_t fCluster; |
| 486 | SkPoint fOffset; |
| 487 | SkVector fAdvance; |
| 488 | bool fMayLineBreakBefore; |
| 489 | bool fMustLineBreakBefore; |
| 490 | bool fHasVisual; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 491 | bool fGraphemeBreakBefore; |
| 492 | bool fUnsafeToBreak; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 493 | }; |
| 494 | struct ShapedRun { |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 495 | ShapedRun(SkShaper::RunHandler::Range utf8Range, const SkFont& font, UBiDiLevel level, |
| 496 | std::unique_ptr<ShapedGlyph[]> glyphs, size_t numGlyphs, SkVector advance = {0, 0}) |
| 497 | : fUtf8Range(utf8Range), fFont(font), fLevel(level) |
| 498 | , fGlyphs(std::move(glyphs)), fNumGlyphs(numGlyphs), fAdvance(advance) |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 499 | {} |
| 500 | |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 501 | SkShaper::RunHandler::Range fUtf8Range; |
Mike Reed | 6d59568 | 2018-12-05 17:28:14 -0500 | [diff] [blame] | 502 | SkFont fFont; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 503 | UBiDiLevel fLevel; |
| 504 | std::unique_ptr<ShapedGlyph[]> fGlyphs; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 505 | size_t fNumGlyphs; |
| 506 | SkVector fAdvance; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 507 | }; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 508 | struct ShapedLine { |
| 509 | SkTArray<ShapedRun> runs; |
| 510 | SkVector fAdvance = { 0, 0 }; |
| 511 | }; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 512 | |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 513 | constexpr bool is_LTR(UBiDiLevel level) { |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 514 | return (level & 1) == 0; |
| 515 | } |
| 516 | |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 517 | void append(SkShaper::RunHandler* handler, const SkShaper::RunHandler::RunInfo& runInfo, |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 518 | const ShapedRun& run, size_t startGlyphIndex, size_t endGlyphIndex) { |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 519 | SkASSERT(startGlyphIndex <= endGlyphIndex); |
| 520 | const size_t glyphLen = endGlyphIndex - startGlyphIndex; |
Florin Malita | 9867f61 | 2018-12-12 10:54:49 -0500 | [diff] [blame] | 521 | |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 522 | const auto buffer = handler->runBuffer(runInfo); |
Florin Malita | 9867f61 | 2018-12-12 10:54:49 -0500 | [diff] [blame] | 523 | SkASSERT(buffer.glyphs); |
| 524 | SkASSERT(buffer.positions); |
| 525 | |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 526 | SkVector advance = {0,0}; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 527 | for (size_t i = 0; i < glyphLen; i++) { |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 528 | // Glyphs are in logical order, but output ltr since PDF readers seem to expect that. |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 529 | const ShapedGlyph& glyph = run.fGlyphs[is_LTR(run.fLevel) ? startGlyphIndex + i |
| 530 | : endGlyphIndex - 1 - i]; |
Florin Malita | 9867f61 | 2018-12-12 10:54:49 -0500 | [diff] [blame] | 531 | buffer.glyphs[i] = glyph.fID; |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 532 | if (buffer.offsets) { |
| 533 | buffer.positions[i] = advance + buffer.point; |
Ben Wagner | bdf2c87 | 2019-10-24 17:06:37 -0400 | [diff] [blame] | 534 | buffer.offsets[i] = glyph.fOffset; |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 535 | } else { |
Ben Wagner | bdf2c87 | 2019-10-24 17:06:37 -0400 | [diff] [blame] | 536 | buffer.positions[i] = advance + buffer.point + glyph.fOffset; |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 537 | } |
Florin Malita | 9867f61 | 2018-12-12 10:54:49 -0500 | [diff] [blame] | 538 | if (buffer.clusters) { |
| 539 | buffer.clusters[i] = glyph.fCluster; |
| 540 | } |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 541 | advance += glyph.fAdvance; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 542 | } |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 543 | handler->commitRunBuffer(runInfo); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 544 | } |
| 545 | |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 546 | void emit(const ShapedLine& line, SkShaper::RunHandler* handler) { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 547 | // Reorder the runs and glyphs per line and write them out. |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 548 | handler->beginLine(); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 549 | |
| 550 | int numRuns = line.runs.size(); |
| 551 | SkAutoSTMalloc<4, UBiDiLevel> runLevels(numRuns); |
| 552 | for (int i = 0; i < numRuns; ++i) { |
| 553 | runLevels[i] = line.runs[i].fLevel; |
| 554 | } |
| 555 | SkAutoSTMalloc<4, int32_t> logicalFromVisual(numRuns); |
| 556 | ubidi_reorderVisual(runLevels, numRuns, logicalFromVisual); |
| 557 | |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 558 | for (int i = 0; i < numRuns; ++i) { |
| 559 | int logicalIndex = logicalFromVisual[i]; |
| 560 | |
| 561 | const auto& run = line.runs[logicalIndex]; |
| 562 | const SkShaper::RunHandler::RunInfo info = { |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 563 | run.fFont, |
| 564 | run.fLevel, |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 565 | run.fAdvance, |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 566 | run.fNumGlyphs, |
| 567 | run.fUtf8Range |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 568 | }; |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 569 | handler->runInfo(info); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 570 | } |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 571 | handler->commitRunInfo(); |
| 572 | for (int i = 0; i < numRuns; ++i) { |
| 573 | int logicalIndex = logicalFromVisual[i]; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 574 | |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 575 | const auto& run = line.runs[logicalIndex]; |
| 576 | const SkShaper::RunHandler::RunInfo info = { |
| 577 | run.fFont, |
| 578 | run.fLevel, |
| 579 | run.fAdvance, |
| 580 | run.fNumGlyphs, |
| 581 | run.fUtf8Range |
| 582 | }; |
| 583 | append(handler, info, run, 0, run.fNumGlyphs); |
| 584 | } |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 585 | |
Florin Malita | 500133b | 2019-02-07 10:56:55 -0500 | [diff] [blame] | 586 | handler->commitLine(); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 587 | } |
| 588 | |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 589 | struct ShapedRunGlyphIterator { |
| 590 | ShapedRunGlyphIterator(const SkTArray<ShapedRun>& origRuns) |
| 591 | : fRuns(&origRuns), fRunIndex(0), fGlyphIndex(0) |
| 592 | { } |
| 593 | |
| 594 | ShapedRunGlyphIterator(const ShapedRunGlyphIterator& that) = default; |
| 595 | ShapedRunGlyphIterator& operator=(const ShapedRunGlyphIterator& that) = default; |
| 596 | bool operator==(const ShapedRunGlyphIterator& that) const { |
| 597 | return fRuns == that.fRuns && |
| 598 | fRunIndex == that.fRunIndex && |
| 599 | fGlyphIndex == that.fGlyphIndex; |
| 600 | } |
| 601 | bool operator!=(const ShapedRunGlyphIterator& that) const { |
| 602 | return fRuns != that.fRuns || |
| 603 | fRunIndex != that.fRunIndex || |
| 604 | fGlyphIndex != that.fGlyphIndex; |
| 605 | } |
| 606 | |
| 607 | ShapedGlyph* next() { |
| 608 | const SkTArray<ShapedRun>& runs = *fRuns; |
| 609 | SkASSERT(fRunIndex < runs.count()); |
| 610 | SkASSERT(fGlyphIndex < runs[fRunIndex].fNumGlyphs); |
| 611 | |
| 612 | ++fGlyphIndex; |
| 613 | if (fGlyphIndex == runs[fRunIndex].fNumGlyphs) { |
| 614 | fGlyphIndex = 0; |
| 615 | ++fRunIndex; |
| 616 | if (fRunIndex >= runs.count()) { |
| 617 | return nullptr; |
| 618 | } |
| 619 | } |
| 620 | return &runs[fRunIndex].fGlyphs[fGlyphIndex]; |
| 621 | } |
| 622 | |
| 623 | ShapedGlyph* current() { |
| 624 | const SkTArray<ShapedRun>& runs = *fRuns; |
| 625 | if (fRunIndex >= runs.count()) { |
| 626 | return nullptr; |
| 627 | } |
| 628 | return &runs[fRunIndex].fGlyphs[fGlyphIndex]; |
| 629 | } |
| 630 | |
| 631 | const SkTArray<ShapedRun>* fRuns; |
| 632 | int fRunIndex; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 633 | size_t fGlyphIndex; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 634 | }; |
| 635 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 636 | class ShaperHarfBuzz : public SkShaper { |
Ben Wagner | b059194 | 2019-02-15 14:46:18 -0500 | [diff] [blame] | 637 | public: |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 638 | ShaperHarfBuzz(HBBuffer, ICUBrk line, ICUBrk grapheme, sk_sp<SkFontMgr>); |
| 639 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 640 | protected: |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 641 | ICUBrk fLineBreakIterator; |
| 642 | ICUBrk fGraphemeBreakIterator; |
| 643 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 644 | ShapedRun shape(const char* utf8, size_t utf8Bytes, |
| 645 | const char* utf8Start, |
| 646 | const char* utf8End, |
| 647 | const BiDiRunIterator&, |
| 648 | const LanguageRunIterator&, |
| 649 | const ScriptRunIterator&, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 650 | const FontRunIterator&, |
| 651 | const Feature*, size_t featuresSize) const; |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 652 | private: |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 653 | const sk_sp<SkFontMgr> fFontMgr; |
| 654 | HBBuffer fBuffer; |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 655 | |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 656 | void shape(const char* utf8, size_t utf8Bytes, |
| 657 | const SkFont&, |
| 658 | bool leftToRight, |
| 659 | SkScalar width, |
| 660 | RunHandler*) const override; |
Ben Wagner | b059194 | 2019-02-15 14:46:18 -0500 | [diff] [blame] | 661 | |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 662 | void shape(const char* utf8Text, size_t textBytes, |
| 663 | FontRunIterator&, |
| 664 | BiDiRunIterator&, |
| 665 | ScriptRunIterator&, |
| 666 | LanguageRunIterator&, |
| 667 | SkScalar width, |
| 668 | RunHandler*) const override; |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 669 | |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 670 | void shape(const char* utf8Text, size_t textBytes, |
| 671 | FontRunIterator&, |
| 672 | BiDiRunIterator&, |
| 673 | ScriptRunIterator&, |
| 674 | LanguageRunIterator&, |
| 675 | const Feature*, size_t featuresSize, |
| 676 | SkScalar width, |
| 677 | RunHandler*) const override; |
| 678 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 679 | virtual void wrap(char const * const utf8, size_t utf8Bytes, |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 680 | const BiDiRunIterator&, |
| 681 | const LanguageRunIterator&, |
| 682 | const ScriptRunIterator&, |
| 683 | const FontRunIterator&, |
| 684 | RunIteratorQueue& runSegmenter, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 685 | const Feature*, size_t featuresSize, |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 686 | SkScalar width, |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 687 | RunHandler*) const = 0; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 688 | }; |
| 689 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 690 | class ShaperDrivenWrapper : public ShaperHarfBuzz { |
| 691 | public: |
| 692 | using ShaperHarfBuzz::ShaperHarfBuzz; |
| 693 | private: |
| 694 | void wrap(char const * const utf8, size_t utf8Bytes, |
| 695 | const BiDiRunIterator&, |
| 696 | const LanguageRunIterator&, |
| 697 | const ScriptRunIterator&, |
| 698 | const FontRunIterator&, |
| 699 | RunIteratorQueue& runSegmenter, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 700 | const Feature*, size_t featuresSize, |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 701 | SkScalar width, |
| 702 | RunHandler*) const override; |
| 703 | }; |
Ben Wagner | b059194 | 2019-02-15 14:46:18 -0500 | [diff] [blame] | 704 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 705 | class ShapeThenWrap : public ShaperHarfBuzz { |
| 706 | public: |
| 707 | using ShaperHarfBuzz::ShaperHarfBuzz; |
| 708 | private: |
| 709 | void wrap(char const * const utf8, size_t utf8Bytes, |
| 710 | const BiDiRunIterator&, |
| 711 | const LanguageRunIterator&, |
| 712 | const ScriptRunIterator&, |
| 713 | const FontRunIterator&, |
| 714 | RunIteratorQueue& runSegmenter, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 715 | const Feature*, size_t featuresSize, |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 716 | SkScalar width, |
| 717 | RunHandler*) const override; |
| 718 | }; |
| 719 | |
Ben Wagner | 6bb79bb | 2019-05-15 10:50:20 -0400 | [diff] [blame] | 720 | class ShapeDontWrapOrReorder : public ShaperHarfBuzz { |
| 721 | public: |
| 722 | using ShaperHarfBuzz::ShaperHarfBuzz; |
| 723 | private: |
| 724 | void wrap(char const * const utf8, size_t utf8Bytes, |
| 725 | const BiDiRunIterator&, |
| 726 | const LanguageRunIterator&, |
| 727 | const ScriptRunIterator&, |
| 728 | const FontRunIterator&, |
| 729 | RunIteratorQueue& runSegmenter, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 730 | const Feature*, size_t featuresSize, |
Ben Wagner | 6bb79bb | 2019-05-15 10:50:20 -0400 | [diff] [blame] | 731 | SkScalar width, |
| 732 | RunHandler*) const override; |
| 733 | }; |
| 734 | |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 735 | static std::unique_ptr<SkShaper> MakeHarfBuzz(sk_sp<SkFontMgr> fontmgr, bool correct) { |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 736 | #if defined(SK_USING_THIRD_PARTY_ICU) |
Hal Canary | 6102192 | 2019-02-06 12:29:11 -0500 | [diff] [blame] | 737 | if (!SkLoadICU()) { |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 738 | SkDEBUGF("SkLoadICU() failed!\n"); |
| 739 | return nullptr; |
Hal Canary | 6102192 | 2019-02-06 12:29:11 -0500 | [diff] [blame] | 740 | } |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 741 | #endif |
| 742 | HBBuffer buffer(hb_buffer_create()); |
| 743 | if (!buffer) { |
| 744 | SkDEBUGF("Could not create hb_buffer"); |
| 745 | return nullptr; |
| 746 | } |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 747 | |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 748 | UErrorCode status = U_ZERO_ERROR; |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 749 | ICUBrk lineBreakIterator(ubrk_open(UBRK_LINE, "th", nullptr, 0, &status)); |
| 750 | if (!lineBreakIterator || U_FAILURE(status)) { |
| 751 | SkDEBUGF("Could not create line break iterator: %s", u_errorName(status)); |
| 752 | return nullptr; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 753 | } |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 754 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 755 | ICUBrk graphemeBreakIterator(ubrk_open(UBRK_CHARACTER, "th", nullptr, 0, &status)); |
| 756 | if (!graphemeBreakIterator || U_FAILURE(status)) { |
| 757 | SkDEBUGF("Could not create grapheme break iterator: %s", u_errorName(status)); |
| 758 | return nullptr; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 759 | } |
| 760 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 761 | if (correct) { |
Mike Klein | f46d5ca | 2019-12-11 10:45:01 -0500 | [diff] [blame] | 762 | return std::make_unique<ShaperDrivenWrapper>(std::move(buffer), |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 763 | std::move(lineBreakIterator), |
| 764 | std::move(graphemeBreakIterator), |
| 765 | std::move(fontmgr)); |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 766 | } else { |
Mike Klein | f46d5ca | 2019-12-11 10:45:01 -0500 | [diff] [blame] | 767 | return std::make_unique<ShapeThenWrap>(std::move(buffer), |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 768 | std::move(lineBreakIterator), |
| 769 | std::move(graphemeBreakIterator), |
| 770 | std::move(fontmgr)); |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 771 | } |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 772 | } |
| 773 | |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 774 | ShaperHarfBuzz::ShaperHarfBuzz(HBBuffer buffer, ICUBrk line, ICUBrk grapheme, |
| 775 | sk_sp<SkFontMgr> fontmgr) |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 776 | : fLineBreakIterator(std::move(line)) |
| 777 | , fGraphemeBreakIterator(std::move(grapheme)) |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 778 | , fFontMgr(std::move(fontmgr)) |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 779 | , fBuffer(std::move(buffer)) |
| 780 | {} |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 781 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 782 | void ShaperHarfBuzz::shape(const char* utf8, size_t utf8Bytes, |
| 783 | const SkFont& srcFont, |
| 784 | bool leftToRight, |
| 785 | SkScalar width, |
| 786 | RunHandler* handler) const |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 787 | { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 788 | UBiDiLevel defaultLevel = leftToRight ? UBIDI_DEFAULT_LTR : UBIDI_DEFAULT_RTL; |
| 789 | |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 790 | std::unique_ptr<BiDiRunIterator> bidi(MakeIcuBiDiRunIterator(utf8, utf8Bytes, defaultLevel)); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 791 | if (!bidi) { |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 792 | return; |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 793 | } |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 794 | |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 795 | std::unique_ptr<LanguageRunIterator> language(MakeStdLanguageRunIterator(utf8, utf8Bytes)); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 796 | if (!language) { |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 797 | return; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 798 | } |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 799 | |
Ben Wagner | 1383a38 | 2019-04-03 17:53:53 -0400 | [diff] [blame] | 800 | std::unique_ptr<ScriptRunIterator> script(MakeHbIcuScriptRunIterator(utf8, utf8Bytes)); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 801 | if (!script) { |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 802 | return; |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 803 | } |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 804 | |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 805 | std::unique_ptr<FontRunIterator> font( |
| 806 | MakeFontMgrRunIterator(utf8, utf8Bytes, srcFont, |
| 807 | fFontMgr ? fFontMgr : SkFontMgr::RefDefault())); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 808 | if (!font) { |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 809 | return; |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 810 | } |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 811 | |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 812 | this->shape(utf8, utf8Bytes, *font, *bidi, *script, *language, width, handler); |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 813 | } |
| 814 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 815 | void ShaperHarfBuzz::shape(const char* utf8, size_t utf8Bytes, |
| 816 | FontRunIterator& font, |
| 817 | BiDiRunIterator& bidi, |
| 818 | ScriptRunIterator& script, |
| 819 | LanguageRunIterator& language, |
| 820 | SkScalar width, |
| 821 | RunHandler* handler) const |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 822 | { |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 823 | this->shape(utf8, utf8Bytes, font, bidi, script, language, nullptr, 0, width, handler); |
| 824 | } |
| 825 | |
| 826 | void ShaperHarfBuzz::shape(const char* utf8, size_t utf8Bytes, |
| 827 | FontRunIterator& font, |
| 828 | BiDiRunIterator& bidi, |
| 829 | ScriptRunIterator& script, |
| 830 | LanguageRunIterator& language, |
| 831 | const Feature* features, size_t featuresSize, |
| 832 | SkScalar width, |
| 833 | RunHandler* handler) const |
| 834 | { |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 835 | SkASSERT(handler); |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 836 | RunIteratorQueue runSegmenter; |
Ben Wagner | 1ca5052 | 2019-10-01 17:54:28 -0400 | [diff] [blame] | 837 | runSegmenter.insert(&font, 3); // The font iterator is always run last in case of tie. |
| 838 | runSegmenter.insert(&bidi, 2); |
| 839 | runSegmenter.insert(&script, 1); |
| 840 | runSegmenter.insert(&language, 0); |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 841 | |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 842 | this->wrap(utf8, utf8Bytes, bidi, language, script, font, runSegmenter, |
| 843 | features, featuresSize, width, handler); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 844 | } |
| 845 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 846 | void ShaperDrivenWrapper::wrap(char const * const utf8, size_t utf8Bytes, |
| 847 | const BiDiRunIterator& bidi, |
| 848 | const LanguageRunIterator& language, |
| 849 | const ScriptRunIterator& script, |
| 850 | const FontRunIterator& font, |
| 851 | RunIteratorQueue& runSegmenter, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 852 | const Feature* features, size_t featuresSize, |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 853 | SkScalar width, |
| 854 | RunHandler* handler) const |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 855 | { |
| 856 | ShapedLine line; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 857 | |
| 858 | const char* utf8Start = nullptr; |
| 859 | const char* utf8End = utf8; |
| 860 | while (runSegmenter.advanceRuns()) { // For each item |
| 861 | utf8Start = utf8End; |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 862 | utf8End = utf8 + runSegmenter.endOfCurrentRun(); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 863 | |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 864 | ShapedRun model(RunHandler::Range(), SkFont(), 0, nullptr, 0); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 865 | bool modelNeedsRegenerated = true; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 866 | int modelGlyphOffset = 0; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 867 | |
| 868 | struct TextProps { |
| 869 | int glyphLen = 0; |
| 870 | SkVector advance = {0, 0}; |
| 871 | }; |
| 872 | // map from character position to [safe to break, glyph position, advance] |
| 873 | std::unique_ptr<TextProps[]> modelText; |
| 874 | int modelTextOffset = 0; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 875 | SkVector modelAdvanceOffset = {0, 0}; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 876 | |
| 877 | while (utf8Start < utf8End) { // While there are still code points left in this item |
| 878 | size_t utf8runLength = utf8End - utf8Start; |
| 879 | if (modelNeedsRegenerated) { |
| 880 | model = shape(utf8, utf8Bytes, |
| 881 | utf8Start, utf8End, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 882 | bidi, language, script, font, |
| 883 | features, featuresSize); |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 884 | modelGlyphOffset = 0; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 885 | |
| 886 | SkVector advance = {0, 0}; |
| 887 | modelText.reset(new TextProps[utf8runLength + 1]()); |
Ben Wagner | b9cc1c6 | 2019-02-14 14:12:48 -0500 | [diff] [blame] | 888 | size_t modelStartCluster = utf8Start - utf8; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 889 | for (size_t i = 0; i < model.fNumGlyphs; ++i) { |
Ben Wagner | 84cc461 | 2019-02-14 17:13:21 -0500 | [diff] [blame] | 890 | SkASSERT(modelStartCluster <= model.fGlyphs[i].fCluster); |
Ben Wagner | 2fe1e23 | 2019-02-14 17:37:02 -0500 | [diff] [blame] | 891 | SkASSERT( model.fGlyphs[i].fCluster < (size_t)(utf8End - utf8)); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 892 | if (!model.fGlyphs[i].fUnsafeToBreak) { |
Ben Wagner | b9cc1c6 | 2019-02-14 14:12:48 -0500 | [diff] [blame] | 893 | modelText[model.fGlyphs[i].fCluster - modelStartCluster].glyphLen = i; |
| 894 | modelText[model.fGlyphs[i].fCluster - modelStartCluster].advance = advance; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 895 | } |
| 896 | advance += model.fGlyphs[i].fAdvance; |
| 897 | } |
| 898 | // Assume it is always safe to break after the end of an item |
| 899 | modelText[utf8runLength].glyphLen = model.fNumGlyphs; |
| 900 | modelText[utf8runLength].advance = model.fAdvance; |
| 901 | modelTextOffset = 0; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 902 | modelAdvanceOffset = {0, 0}; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 903 | modelNeedsRegenerated = false; |
| 904 | } |
| 905 | |
| 906 | // TODO: break iterator per item, but just reset position if needed? |
| 907 | // Maybe break iterator with model? |
| 908 | UBreakIterator& breakIterator = *fLineBreakIterator; |
| 909 | { |
| 910 | UErrorCode status = U_ZERO_ERROR; |
Ben Wagner | 723a877 | 2019-08-16 11:36:58 -0400 | [diff] [blame] | 911 | UText sUtf8UText = UTEXT_INITIALIZER; |
| 912 | ICUUText utf8UText(utext_openUTF8(&sUtf8UText, utf8Start, utf8runLength, &status)); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 913 | if (U_FAILURE(status)) { |
| 914 | SkDebugf("Could not create utf8UText: %s", u_errorName(status)); |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 915 | return; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 916 | } |
Ben Wagner | 723a877 | 2019-08-16 11:36:58 -0400 | [diff] [blame] | 917 | ubrk_setUText(&breakIterator, utf8UText.get(), &status); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 918 | if (U_FAILURE(status)) { |
| 919 | SkDebugf("Could not setText on break iterator: %s", u_errorName(status)); |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 920 | return; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 921 | } |
| 922 | } |
| 923 | |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 924 | ShapedRun best(RunHandler::Range(), SkFont(), 0, nullptr, 0, |
| 925 | { SK_ScalarNegativeInfinity, SK_ScalarNegativeInfinity }); |
| 926 | bool bestIsInvalid = true; |
| 927 | bool bestUsesModelForGlyphs = false; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 928 | SkScalar widthLeft = width - line.fAdvance.fX; |
| 929 | |
| 930 | for (int32_t breakIteratorCurrent = ubrk_next(&breakIterator); |
| 931 | breakIteratorCurrent != UBRK_DONE; |
| 932 | breakIteratorCurrent = ubrk_next(&breakIterator)) |
| 933 | { |
| 934 | // TODO: if past a safe to break, future safe to break will be at least as long |
| 935 | |
| 936 | // TODO: adjust breakIteratorCurrent by ignorable whitespace |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 937 | bool candidateUsesModelForGlyphs = false; |
| 938 | ShapedRun candidate = [&](const TextProps& props){ |
| 939 | if (props.glyphLen) { |
| 940 | candidateUsesModelForGlyphs = true; |
| 941 | return ShapedRun(RunHandler::Range(utf8Start - utf8, breakIteratorCurrent), |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 942 | font.currentFont(), bidi.currentLevel(), |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 943 | std::unique_ptr<ShapedGlyph[]>(), |
| 944 | props.glyphLen - modelGlyphOffset, |
| 945 | props.advance - modelAdvanceOffset); |
| 946 | } else { |
| 947 | return shape(utf8, utf8Bytes, |
| 948 | utf8Start, utf8Start + breakIteratorCurrent, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 949 | bidi, language, script, font, |
| 950 | features, featuresSize); |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 951 | } |
| 952 | }(modelText[breakIteratorCurrent + modelTextOffset]); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 953 | auto score = [widthLeft](const ShapedRun& run) -> SkScalar { |
| 954 | if (run.fAdvance.fX < widthLeft) { |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 955 | return run.fUtf8Range.size(); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 956 | } else { |
| 957 | return widthLeft - run.fAdvance.fX; |
| 958 | } |
| 959 | }; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 960 | if (bestIsInvalid || score(best) < score(candidate)) { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 961 | best = std::move(candidate); |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 962 | bestIsInvalid = false; |
| 963 | bestUsesModelForGlyphs = candidateUsesModelForGlyphs; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 964 | } |
| 965 | } |
| 966 | |
| 967 | // If nothing fit (best score is negative) and the line is not empty |
| 968 | if (width < line.fAdvance.fX + best.fAdvance.fX && !line.runs.empty()) { |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 969 | emit(line, handler); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 970 | line.runs.reset(); |
| 971 | line.fAdvance = {0, 0}; |
| 972 | } else { |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 973 | if (bestUsesModelForGlyphs) { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 974 | best.fGlyphs.reset(new ShapedGlyph[best.fNumGlyphs]); |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 975 | memcpy(best.fGlyphs.get(), model.fGlyphs.get() + modelGlyphOffset, |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 976 | best.fNumGlyphs * sizeof(ShapedGlyph)); |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 977 | modelGlyphOffset += best.fNumGlyphs; |
| 978 | modelTextOffset += best.fUtf8Range.size(); |
| 979 | modelAdvanceOffset += best.fAdvance; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 980 | } else { |
| 981 | modelNeedsRegenerated = true; |
| 982 | } |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 983 | utf8Start += best.fUtf8Range.size(); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 984 | line.fAdvance += best.fAdvance; |
| 985 | line.runs.emplace_back(std::move(best)); |
| 986 | |
| 987 | // If item broken, emit line (prevent remainder from accidentally fitting) |
| 988 | if (utf8Start != utf8End) { |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 989 | emit(line, handler); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 990 | line.runs.reset(); |
| 991 | line.fAdvance = {0, 0}; |
| 992 | } |
| 993 | } |
| 994 | } |
| 995 | } |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 996 | emit(line, handler); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 997 | } |
| 998 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 999 | void ShapeThenWrap::wrap(char const * const utf8, size_t utf8Bytes, |
| 1000 | const BiDiRunIterator& bidi, |
| 1001 | const LanguageRunIterator& language, |
| 1002 | const ScriptRunIterator& script, |
| 1003 | const FontRunIterator& font, |
| 1004 | RunIteratorQueue& runSegmenter, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 1005 | const Feature* features, size_t featuresSize, |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 1006 | SkScalar width, |
| 1007 | RunHandler* handler) const |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1008 | { |
| 1009 | SkTArray<ShapedRun> runs; |
| 1010 | { |
| 1011 | UBreakIterator& lineBreakIterator = *fLineBreakIterator; |
| 1012 | UBreakIterator& graphemeBreakIterator = *fGraphemeBreakIterator; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1013 | { |
| 1014 | UErrorCode status = U_ZERO_ERROR; |
Ben Wagner | 723a877 | 2019-08-16 11:36:58 -0400 | [diff] [blame] | 1015 | UText sUtf8UText = UTEXT_INITIALIZER; |
| 1016 | ICUUText utf8UText(utext_openUTF8(&sUtf8UText, utf8, utf8Bytes, &status)); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1017 | if (U_FAILURE(status)) { |
| 1018 | SkDebugf("Could not create utf8UText: %s", u_errorName(status)); |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 1019 | return; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1020 | } |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1021 | |
Ben Wagner | 723a877 | 2019-08-16 11:36:58 -0400 | [diff] [blame] | 1022 | ubrk_setUText(&lineBreakIterator, utf8UText.get(), &status); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1023 | if (U_FAILURE(status)) { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1024 | SkDebugf("Could not setText on line break iterator: %s", u_errorName(status)); |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 1025 | return; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1026 | } |
Ben Wagner | 723a877 | 2019-08-16 11:36:58 -0400 | [diff] [blame] | 1027 | ubrk_setUText(&graphemeBreakIterator, utf8UText.get(), &status); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1028 | if (U_FAILURE(status)) { |
| 1029 | SkDebugf("Could not setText on grapheme break iterator: %s", u_errorName(status)); |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 1030 | return; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1031 | } |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 1032 | } |
| 1033 | |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1034 | const char* utf8Start = nullptr; |
| 1035 | const char* utf8End = utf8; |
| 1036 | while (runSegmenter.advanceRuns()) { |
| 1037 | utf8Start = utf8End; |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 1038 | utf8End = utf8 + runSegmenter.endOfCurrentRun(); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1039 | |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1040 | runs.emplace_back(shape(utf8, utf8Bytes, |
| 1041 | utf8Start, utf8End, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 1042 | bidi, language, script, font, |
| 1043 | features, featuresSize)); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1044 | ShapedRun& run = runs.back(); |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 1045 | |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1046 | uint32_t previousCluster = 0xFFFFFFFF; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 1047 | for (size_t i = 0; i < run.fNumGlyphs; ++i) { |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1048 | ShapedGlyph& glyph = run.fGlyphs[i]; |
Ben Wagner | b9cc1c6 | 2019-02-14 14:12:48 -0500 | [diff] [blame] | 1049 | int32_t glyphCluster = glyph.fCluster; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1050 | |
| 1051 | int32_t lineBreakIteratorCurrent = ubrk_current(&lineBreakIterator); |
| 1052 | while (lineBreakIteratorCurrent != UBRK_DONE && |
| 1053 | lineBreakIteratorCurrent < glyphCluster) |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1054 | { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1055 | lineBreakIteratorCurrent = ubrk_next(&lineBreakIterator); |
Ben Wagner | 2868b78 | 2017-08-31 14:12:27 -0400 | [diff] [blame] | 1056 | } |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1057 | glyph.fMayLineBreakBefore = glyph.fCluster != previousCluster && |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1058 | lineBreakIteratorCurrent == glyphCluster; |
| 1059 | |
| 1060 | int32_t graphemeBreakIteratorCurrent = ubrk_current(&graphemeBreakIterator); |
| 1061 | while (graphemeBreakIteratorCurrent != UBRK_DONE && |
| 1062 | graphemeBreakIteratorCurrent < glyphCluster) |
| 1063 | { |
| 1064 | graphemeBreakIteratorCurrent = ubrk_next(&graphemeBreakIterator); |
| 1065 | } |
| 1066 | glyph.fGraphemeBreakBefore = glyph.fCluster != previousCluster && |
| 1067 | graphemeBreakIteratorCurrent == glyphCluster; |
| 1068 | |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1069 | previousCluster = glyph.fCluster; |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 1070 | } |
| 1071 | } |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1072 | } |
| 1073 | |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1074 | // Iterate over the glyphs in logical order to find potential line lengths. |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1075 | { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1076 | /** The position of the beginning of the line. */ |
| 1077 | ShapedRunGlyphIterator beginning(runs); |
| 1078 | |
| 1079 | /** The position of the candidate line break. */ |
| 1080 | ShapedRunGlyphIterator candidateLineBreak(runs); |
| 1081 | SkScalar candidateLineBreakWidth = 0; |
| 1082 | |
| 1083 | /** The position of the candidate grapheme break. */ |
| 1084 | ShapedRunGlyphIterator candidateGraphemeBreak(runs); |
| 1085 | SkScalar candidateGraphemeBreakWidth = 0; |
| 1086 | |
| 1087 | /** The position of the current location. */ |
| 1088 | ShapedRunGlyphIterator current(runs); |
| 1089 | SkScalar currentWidth = 0; |
| 1090 | while (ShapedGlyph* glyph = current.current()) { |
| 1091 | // 'Break' at graphemes until a line boundary, then only at line boundaries. |
| 1092 | // Only break at graphemes if no line boundary is valid. |
| 1093 | if (current != beginning) { |
| 1094 | if (glyph->fGraphemeBreakBefore || glyph->fMayLineBreakBefore) { |
| 1095 | // TODO: preserve line breaks <= grapheme breaks |
| 1096 | // and prevent line breaks inside graphemes |
| 1097 | candidateGraphemeBreak = current; |
| 1098 | candidateGraphemeBreakWidth = currentWidth; |
| 1099 | if (glyph->fMayLineBreakBefore) { |
| 1100 | candidateLineBreak = current; |
| 1101 | candidateLineBreakWidth = currentWidth; |
| 1102 | } |
| 1103 | } |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1104 | } |
| 1105 | |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1106 | SkScalar glyphWidth = glyph->fAdvance.fX; |
| 1107 | // Break when overwidth, the glyph has a visual representation, and some space is used. |
| 1108 | if (width < currentWidth + glyphWidth && glyph->fHasVisual && candidateGraphemeBreakWidth > 0){ |
| 1109 | if (candidateLineBreak != beginning) { |
| 1110 | beginning = candidateLineBreak; |
| 1111 | currentWidth -= candidateLineBreakWidth; |
| 1112 | candidateGraphemeBreakWidth -= candidateLineBreakWidth; |
| 1113 | candidateLineBreakWidth = 0; |
| 1114 | } else if (candidateGraphemeBreak != beginning) { |
| 1115 | beginning = candidateGraphemeBreak; |
| 1116 | candidateLineBreak = beginning; |
| 1117 | currentWidth -= candidateGraphemeBreakWidth; |
| 1118 | candidateGraphemeBreakWidth = 0; |
| 1119 | candidateLineBreakWidth = 0; |
| 1120 | } else { |
| 1121 | SK_ABORT(""); |
| 1122 | } |
| 1123 | |
| 1124 | if (width < currentWidth) { |
| 1125 | if (width < candidateGraphemeBreakWidth) { |
| 1126 | candidateGraphemeBreak = candidateLineBreak; |
| 1127 | candidateGraphemeBreakWidth = candidateLineBreakWidth; |
| 1128 | } |
| 1129 | current = candidateGraphemeBreak; |
| 1130 | currentWidth = candidateGraphemeBreakWidth; |
| 1131 | } |
| 1132 | |
| 1133 | glyph = beginning.current(); |
| 1134 | if (glyph) { |
| 1135 | glyph->fMustLineBreakBefore = true; |
| 1136 | } |
| 1137 | |
| 1138 | } else { |
| 1139 | current.next(); |
| 1140 | currentWidth += glyphWidth; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1141 | } |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1142 | } |
| 1143 | } |
| 1144 | |
| 1145 | // Reorder the runs and glyphs per line and write them out. |
| 1146 | { |
| 1147 | ShapedRunGlyphIterator previousBreak(runs); |
| 1148 | ShapedRunGlyphIterator glyphIterator(runs); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1149 | int previousRunIndex = -1; |
| 1150 | while (glyphIterator.current()) { |
Ben Wagner | 0033008 | 2019-09-16 15:56:51 -0400 | [diff] [blame] | 1151 | const ShapedRunGlyphIterator current = glyphIterator; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1152 | ShapedGlyph* nextGlyph = glyphIterator.next(); |
| 1153 | |
Ben Wagner | 0033008 | 2019-09-16 15:56:51 -0400 | [diff] [blame] | 1154 | if (previousRunIndex != current.fRunIndex) { |
Mike Reed | b5784ac | 2018-11-12 09:35:15 -0500 | [diff] [blame] | 1155 | SkFontMetrics metrics; |
Ben Wagner | 0033008 | 2019-09-16 15:56:51 -0400 | [diff] [blame] | 1156 | runs[current.fRunIndex].fFont.getMetrics(&metrics); |
| 1157 | previousRunIndex = current.fRunIndex; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1158 | } |
| 1159 | |
| 1160 | // Nothing can be written until the baseline is known. |
| 1161 | if (!(nextGlyph == nullptr || nextGlyph->fMustLineBreakBefore)) { |
| 1162 | continue; |
| 1163 | } |
| 1164 | |
Ben Wagner | 0033008 | 2019-09-16 15:56:51 -0400 | [diff] [blame] | 1165 | int numRuns = current.fRunIndex - previousBreak.fRunIndex + 1; |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1166 | SkAutoSTMalloc<4, UBiDiLevel> runLevels(numRuns); |
| 1167 | for (int i = 0; i < numRuns; ++i) { |
| 1168 | runLevels[i] = runs[previousBreak.fRunIndex + i].fLevel; |
| 1169 | } |
| 1170 | SkAutoSTMalloc<4, int32_t> logicalFromVisual(numRuns); |
| 1171 | ubidi_reorderVisual(runLevels, numRuns, logicalFromVisual); |
| 1172 | |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1173 | // step through the runs in reverse visual order and the glyphs in reverse logical order |
| 1174 | // until a visible glyph is found and force them to the end of the visual line. |
| 1175 | |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 1176 | handler->beginLine(); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1177 | |
Ben Wagner | 0033008 | 2019-09-16 15:56:51 -0400 | [diff] [blame] | 1178 | struct SubRun { const ShapedRun& run; size_t startGlyphIndex; size_t endGlyphIndex; }; |
| 1179 | auto makeSubRun = [&runs, &previousBreak, ¤t, &logicalFromVisual](size_t visualIndex){ |
| 1180 | int logicalIndex = previousBreak.fRunIndex + logicalFromVisual[visualIndex]; |
| 1181 | const auto& run = runs[logicalIndex]; |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 1182 | size_t startGlyphIndex = (logicalIndex == previousBreak.fRunIndex) |
| 1183 | ? previousBreak.fGlyphIndex |
| 1184 | : 0; |
Ben Wagner | 0033008 | 2019-09-16 15:56:51 -0400 | [diff] [blame] | 1185 | size_t endGlyphIndex = (logicalIndex == current.fRunIndex) |
| 1186 | ? current.fGlyphIndex + 1 |
Ben Wagner | 3bdb69c | 2019-04-01 19:01:09 -0400 | [diff] [blame] | 1187 | : run.fNumGlyphs; |
Ben Wagner | 0033008 | 2019-09-16 15:56:51 -0400 | [diff] [blame] | 1188 | return SubRun{ run, startGlyphIndex, endGlyphIndex }; |
| 1189 | }; |
| 1190 | auto makeRunInfo = [](const SubRun& sub) { |
| 1191 | uint32_t startUtf8 = sub.run.fGlyphs[sub.startGlyphIndex].fCluster; |
| 1192 | uint32_t endUtf8 = (sub.endGlyphIndex < sub.run.fNumGlyphs) |
| 1193 | ? sub.run.fGlyphs[sub.endGlyphIndex].fCluster |
| 1194 | : sub.run.fUtf8Range.end(); |
Florin Malita | 950243d | 2019-01-11 11:08:35 -0500 | [diff] [blame] | 1195 | |
Ben Wagner | 0033008 | 2019-09-16 15:56:51 -0400 | [diff] [blame] | 1196 | SkVector advance = SkVector::Make(0, 0); |
| 1197 | for (size_t i = sub.startGlyphIndex; i < sub.endGlyphIndex; ++i) { |
| 1198 | advance += sub.run.fGlyphs[i].fAdvance; |
| 1199 | } |
| 1200 | |
| 1201 | return RunHandler::RunInfo{ |
| 1202 | sub.run.fFont, |
| 1203 | sub.run.fLevel, |
| 1204 | advance, |
| 1205 | sub.endGlyphIndex - sub.startGlyphIndex, |
| 1206 | RunHandler::Range(startUtf8, endUtf8 - startUtf8) |
| 1207 | }; |
| 1208 | }; |
| 1209 | |
| 1210 | for (int i = 0; i < numRuns; ++i) { |
| 1211 | handler->runInfo(makeRunInfo(makeSubRun(i))); |
| 1212 | } |
| 1213 | handler->commitRunInfo(); |
| 1214 | for (int i = 0; i < numRuns; ++i) { |
| 1215 | SubRun sub = makeSubRun(i); |
| 1216 | append(handler, makeRunInfo(sub), sub.run, sub.startGlyphIndex, sub.endGlyphIndex); |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1217 | } |
| 1218 | |
Florin Malita | 500133b | 2019-02-07 10:56:55 -0500 | [diff] [blame] | 1219 | handler->commitLine(); |
| 1220 | |
Ben Wagner | 8d45a38 | 2017-11-16 10:08:28 -0500 | [diff] [blame] | 1221 | previousRunIndex = -1; |
| 1222 | previousBreak = glyphIterator; |
| 1223 | } |
| 1224 | } |
Ben Wagner | a25fbef | 2017-08-30 13:56:19 -0400 | [diff] [blame] | 1225 | } |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1226 | |
Ben Wagner | 6bb79bb | 2019-05-15 10:50:20 -0400 | [diff] [blame] | 1227 | void ShapeDontWrapOrReorder::wrap(char const * const utf8, size_t utf8Bytes, |
| 1228 | const BiDiRunIterator& bidi, |
| 1229 | const LanguageRunIterator& language, |
| 1230 | const ScriptRunIterator& script, |
| 1231 | const FontRunIterator& font, |
| 1232 | RunIteratorQueue& runSegmenter, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 1233 | const Feature* features, size_t featuresSize, |
Ben Wagner | 6bb79bb | 2019-05-15 10:50:20 -0400 | [diff] [blame] | 1234 | SkScalar width, |
| 1235 | RunHandler* handler) const |
| 1236 | { |
| 1237 | sk_ignore_unused_variable(width); |
| 1238 | SkTArray<ShapedRun> runs; |
| 1239 | |
| 1240 | const char* utf8Start = nullptr; |
| 1241 | const char* utf8End = utf8; |
| 1242 | while (runSegmenter.advanceRuns()) { |
| 1243 | utf8Start = utf8End; |
| 1244 | utf8End = utf8 + runSegmenter.endOfCurrentRun(); |
| 1245 | |
| 1246 | runs.emplace_back(shape(utf8, utf8Bytes, |
| 1247 | utf8Start, utf8End, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 1248 | bidi, language, script, font, |
| 1249 | features, featuresSize)); |
Ben Wagner | 6bb79bb | 2019-05-15 10:50:20 -0400 | [diff] [blame] | 1250 | } |
| 1251 | |
| 1252 | handler->beginLine(); |
| 1253 | for (const auto& run : runs) { |
| 1254 | const RunHandler::RunInfo info = { |
| 1255 | run.fFont, |
| 1256 | run.fLevel, |
| 1257 | run.fAdvance, |
| 1258 | run.fNumGlyphs, |
| 1259 | run.fUtf8Range |
| 1260 | }; |
| 1261 | handler->runInfo(info); |
| 1262 | } |
| 1263 | handler->commitRunInfo(); |
| 1264 | for (const auto& run : runs) { |
| 1265 | const RunHandler::RunInfo info = { |
| 1266 | run.fFont, |
| 1267 | run.fLevel, |
| 1268 | run.fAdvance, |
| 1269 | run.fNumGlyphs, |
| 1270 | run.fUtf8Range |
| 1271 | }; |
| 1272 | append(handler, info, run, 0, run.fNumGlyphs); |
| 1273 | } |
| 1274 | handler->commitLine(); |
| 1275 | } |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1276 | |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 1277 | ShapedRun ShaperHarfBuzz::shape(char const * const utf8, |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 1278 | size_t const utf8Bytes, |
| 1279 | char const * const utf8Start, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 1280 | char const * const utf8End, |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 1281 | const BiDiRunIterator& bidi, |
| 1282 | const LanguageRunIterator& language, |
| 1283 | const ScriptRunIterator& script, |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 1284 | const FontRunIterator& font, |
| 1285 | Feature const * const features, size_t const featuresSize) const |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1286 | { |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 1287 | size_t utf8runLength = utf8End - utf8Start; |
| 1288 | ShapedRun run(RunHandler::Range(utf8Start - utf8, utf8runLength), |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 1289 | font.currentFont(), bidi.currentLevel(), nullptr, 0); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1290 | |
| 1291 | hb_buffer_t* buffer = fBuffer.get(); |
| 1292 | SkAutoTCallVProc<hb_buffer_t, hb_buffer_clear_contents> autoClearBuffer(buffer); |
| 1293 | hb_buffer_set_content_type(buffer, HB_BUFFER_CONTENT_TYPE_UNICODE); |
| 1294 | hb_buffer_set_cluster_level(buffer, HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS); |
| 1295 | |
Ben Wagner | 56a48bb | 2020-01-16 10:07:41 -0500 | [diff] [blame] | 1296 | // Documentation for HB_BUFFER_FLAG_BOT/EOT at 763e5466c0a03a7c27020e1e2598e488612529a7. |
| 1297 | // Currently BOT forces a dotted circle when first codepoint is a mark; EOT has no effect. |
| 1298 | // Avoid adding dotted circle, re-evaluate if BOT/EOT change. See https://skbug.com/9618. |
| 1299 | // hb_buffer_set_flags(buffer, HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT); |
Ben Wagner | 2fc1474 | 2019-02-06 16:37:44 -0500 | [diff] [blame] | 1300 | |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1301 | // Add precontext. |
| 1302 | hb_buffer_add_utf8(buffer, utf8, utf8Start - utf8, utf8Start - utf8, 0); |
| 1303 | |
| 1304 | // Populate the hb_buffer directly with utf8 cluster indexes. |
| 1305 | const char* utf8Current = utf8Start; |
| 1306 | while (utf8Current < utf8End) { |
Ben Wagner | b9cc1c6 | 2019-02-14 14:12:48 -0500 | [diff] [blame] | 1307 | unsigned int cluster = utf8Current - utf8; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1308 | hb_codepoint_t u = utf8_next(&utf8Current, utf8End); |
| 1309 | hb_buffer_add(buffer, u, cluster); |
| 1310 | } |
| 1311 | |
| 1312 | // Add postcontext. |
| 1313 | hb_buffer_add_utf8(buffer, utf8Current, utf8 + utf8Bytes - utf8Current, 0, 0); |
| 1314 | |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 1315 | hb_direction_t direction = is_LTR(bidi.currentLevel()) ? HB_DIRECTION_LTR:HB_DIRECTION_RTL; |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1316 | hb_buffer_set_direction(buffer, direction); |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 1317 | hb_buffer_set_script(buffer, hb_script_from_iso15924_tag((hb_tag_t)script.currentScript())); |
| 1318 | hb_buffer_set_language(buffer, hb_language_from_string(language.currentLanguage(), -1)); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1319 | hb_buffer_guess_segment_properties(buffer); |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 1320 | |
| 1321 | // TODO: how to cache hbface (typeface) / hbfont (font) |
| 1322 | HBFont hbFont(create_hb_font(font.currentFont())); |
| 1323 | if (!hbFont) { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1324 | return run; |
| 1325 | } |
Ben Wagner | 24ee4e0 | 2019-10-11 10:36:10 -0400 | [diff] [blame] | 1326 | |
| 1327 | SkSTArray<32, hb_feature_t> hbFeatures; |
| 1328 | for (const auto& feature : SkMakeSpan(features, featuresSize)) { |
| 1329 | if (feature.end < SkTo<size_t>(utf8Start - utf8) || |
| 1330 | SkTo<size_t>(utf8End - utf8) <= feature.start) |
| 1331 | { |
| 1332 | continue; |
| 1333 | } |
| 1334 | if (feature.start <= SkTo<size_t>(utf8Start - utf8) && |
| 1335 | SkTo<size_t>(utf8End - utf8) <= feature.end) |
| 1336 | { |
| 1337 | hbFeatures.push_back({ (hb_tag_t)feature.tag, feature.value, |
| 1338 | HB_FEATURE_GLOBAL_START, HB_FEATURE_GLOBAL_END}); |
| 1339 | } else { |
| 1340 | hbFeatures.push_back({ (hb_tag_t)feature.tag, feature.value, |
| 1341 | SkTo<unsigned>(feature.start), SkTo<unsigned>(feature.end)}); |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | hb_shape(hbFont.get(), buffer, hbFeatures.data(), hbFeatures.size()); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1346 | unsigned len = hb_buffer_get_length(buffer); |
| 1347 | if (len == 0) { |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1348 | return run; |
| 1349 | } |
| 1350 | |
| 1351 | if (direction == HB_DIRECTION_RTL) { |
| 1352 | // Put the clusters back in logical order. |
| 1353 | // Note that the advances remain ltr. |
| 1354 | hb_buffer_reverse(buffer); |
| 1355 | } |
| 1356 | hb_glyph_info_t* info = hb_buffer_get_glyph_infos(buffer, nullptr); |
| 1357 | hb_glyph_position_t* pos = hb_buffer_get_glyph_positions(buffer, nullptr); |
| 1358 | |
Ben Wagner | 7415a42 | 2019-03-25 15:38:22 -0400 | [diff] [blame] | 1359 | run = ShapedRun(RunHandler::Range(utf8Start - utf8, utf8runLength), |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 1360 | font.currentFont(), bidi.currentLevel(), |
Ben Wagner | 454e5fb | 2019-02-08 17:46:38 -0500 | [diff] [blame] | 1361 | std::unique_ptr<ShapedGlyph[]>(new ShapedGlyph[len]), len); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1362 | int scaleX, scaleY; |
Ben Wagner | 1e08a7c | 2019-03-27 15:37:13 -0400 | [diff] [blame] | 1363 | hb_font_get_scale(hbFont.get(), &scaleX, &scaleY); |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1364 | double textSizeY = run.fFont.getSize() / scaleY; |
| 1365 | double textSizeX = run.fFont.getSize() / scaleX * run.fFont.getScaleX(); |
| 1366 | SkVector runAdvance = { 0, 0 }; |
| 1367 | for (unsigned i = 0; i < len; i++) { |
| 1368 | ShapedGlyph& glyph = run.fGlyphs[i]; |
| 1369 | glyph.fID = info[i].codepoint; |
| 1370 | glyph.fCluster = info[i].cluster; |
| 1371 | glyph.fOffset.fX = pos[i].x_offset * textSizeX; |
Ben Wagner | bdf2c87 | 2019-10-24 17:06:37 -0400 | [diff] [blame] | 1372 | glyph.fOffset.fY = -(pos[i].y_offset * textSizeY); // HarfBuzz y-up, Skia y-down |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1373 | glyph.fAdvance.fX = pos[i].x_advance * textSizeX; |
Ben Wagner | bdf2c87 | 2019-10-24 17:06:37 -0400 | [diff] [blame] | 1374 | glyph.fAdvance.fY = -(pos[i].y_advance * textSizeY); // HarfBuzz y-up, Skia y-down |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1375 | |
| 1376 | SkRect bounds; |
| 1377 | SkScalar advance; |
| 1378 | SkPaint p; |
| 1379 | run.fFont.getWidthsBounds(&glyph.fID, 1, &advance, &bounds, &p); |
| 1380 | glyph.fHasVisual = !bounds.isEmpty(); //!font->currentTypeface()->glyphBoundsAreZero(glyph.fID); |
Kevin Lubick | 867da4b | 2019-02-22 15:55:39 -0500 | [diff] [blame] | 1381 | #if SK_HB_VERSION_CHECK(1, 5, 0) |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1382 | glyph.fUnsafeToBreak = info[i].mask & HB_GLYPH_FLAG_UNSAFE_TO_BREAK; |
Kevin Lubick | 867da4b | 2019-02-22 15:55:39 -0500 | [diff] [blame] | 1383 | #else |
| 1384 | glyph.fUnsafeToBreak = false; |
| 1385 | #endif |
Ben Wagner | 0ec8ec2 | 2018-09-04 18:17:13 -0400 | [diff] [blame] | 1386 | glyph.fMustLineBreakBefore = false; |
| 1387 | |
| 1388 | runAdvance += glyph.fAdvance; |
| 1389 | } |
| 1390 | run.fAdvance = runAdvance; |
| 1391 | |
| 1392 | return run; |
| 1393 | } |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 1394 | |
| 1395 | } // namespace |
| 1396 | |
| 1397 | std::unique_ptr<SkShaper::BiDiRunIterator> |
| 1398 | SkShaper::MakeIcuBiDiRunIterator(const char* utf8, size_t utf8Bytes, uint8_t bidiLevel) { |
| 1399 | // ubidi only accepts utf16 (though internally it basically works on utf32 chars). |
| 1400 | // We want an ubidi_setPara(UBiDi*, UText*, UBiDiLevel, UBiDiLevel*, UErrorCode*); |
| 1401 | if (!SkTFitsIn<int32_t>(utf8Bytes)) { |
| 1402 | SkDEBUGF("Bidi error: text too long"); |
| 1403 | return nullptr; |
| 1404 | } |
| 1405 | |
| 1406 | UErrorCode status = U_ZERO_ERROR; |
| 1407 | |
| 1408 | // Getting the length like this seems to always set U_BUFFER_OVERFLOW_ERROR |
| 1409 | int32_t utf16Units; |
| 1410 | u_strFromUTF8(nullptr, 0, &utf16Units, utf8, utf8Bytes, &status); |
| 1411 | status = U_ZERO_ERROR; |
| 1412 | std::unique_ptr<UChar[]> utf16(new UChar[utf16Units]); |
| 1413 | u_strFromUTF8(utf16.get(), utf16Units, nullptr, utf8, utf8Bytes, &status); |
| 1414 | if (U_FAILURE(status)) { |
| 1415 | SkDEBUGF("Invalid utf8 input: %s", u_errorName(status)); |
| 1416 | return nullptr; |
| 1417 | } |
| 1418 | |
| 1419 | ICUBiDi bidi(ubidi_openSized(utf16Units, 0, &status)); |
| 1420 | if (U_FAILURE(status)) { |
| 1421 | SkDEBUGF("Bidi error: %s", u_errorName(status)); |
| 1422 | return nullptr; |
| 1423 | } |
| 1424 | SkASSERT(bidi); |
| 1425 | |
| 1426 | // The required lifetime of utf16 isn't well documented. |
| 1427 | // It appears it isn't used after ubidi_setPara except through ubidi_getText. |
| 1428 | ubidi_setPara(bidi.get(), utf16.get(), utf16Units, bidiLevel, nullptr, &status); |
| 1429 | if (U_FAILURE(status)) { |
| 1430 | SkDEBUGF("Bidi error: %s", u_errorName(status)); |
| 1431 | return nullptr; |
| 1432 | } |
| 1433 | |
Mike Klein | f46d5ca | 2019-12-11 10:45:01 -0500 | [diff] [blame] | 1434 | return std::make_unique<IcuBiDiRunIterator>(utf8, utf8 + utf8Bytes, std::move(bidi)); |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 1435 | } |
| 1436 | |
| 1437 | std::unique_ptr<SkShaper::ScriptRunIterator> |
| 1438 | SkShaper::MakeHbIcuScriptRunIterator(const char* utf8, size_t utf8Bytes) { |
Mike Klein | f46d5ca | 2019-12-11 10:45:01 -0500 | [diff] [blame] | 1439 | return std::make_unique<HbIcuScriptRunIterator>(utf8, utf8Bytes); |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 1440 | } |
| 1441 | |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 1442 | std::unique_ptr<SkShaper> SkShaper::MakeShaperDrivenWrapper(sk_sp<SkFontMgr> fontmgr) { |
| 1443 | return MakeHarfBuzz(std::move(fontmgr), true); |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 1444 | } |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 1445 | std::unique_ptr<SkShaper> SkShaper::MakeShapeThenWrap(sk_sp<SkFontMgr> fontmgr) { |
| 1446 | return MakeHarfBuzz(std::move(fontmgr), false); |
Ben Wagner | 51874e3 | 2019-04-04 15:21:20 -0400 | [diff] [blame] | 1447 | } |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 1448 | std::unique_ptr<SkShaper> SkShaper::MakeShapeDontWrapOrReorder(sk_sp<SkFontMgr> fontmgr) { |
Ben Wagner | 6bb79bb | 2019-05-15 10:50:20 -0400 | [diff] [blame] | 1449 | #if defined(SK_USING_THIRD_PARTY_ICU) |
| 1450 | if (!SkLoadICU()) { |
| 1451 | SkDEBUGF("SkLoadICU() failed!\n"); |
| 1452 | return nullptr; |
| 1453 | } |
| 1454 | #endif |
| 1455 | HBBuffer buffer(hb_buffer_create()); |
| 1456 | if (!buffer) { |
| 1457 | SkDEBUGF("Could not create hb_buffer"); |
| 1458 | return nullptr; |
| 1459 | } |
| 1460 | |
Mike Klein | f46d5ca | 2019-12-11 10:45:01 -0500 | [diff] [blame] | 1461 | return std::make_unique<ShapeDontWrapOrReorder>(std::move(buffer), nullptr, nullptr, |
Florin Malita | 4268433 | 2019-07-26 14:54:40 -0400 | [diff] [blame] | 1462 | std::move(fontmgr)); |
Ben Wagner | 6bb79bb | 2019-05-15 10:50:20 -0400 | [diff] [blame] | 1463 | } |