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| 1 /* | |
| 2 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies) | |
| 3 * | |
| 4 * This is part of HarfBuzz, an OpenType Layout engine library. | |
| 5 * | |
| 6 * Permission is hereby granted, without written agreement and without | |
| 7 * license or royalty fees, to use, copy, modify, and distribute this | |
| 8 * software and its documentation for any purpose, provided that the | |
| 9 * above copyright notice and the following two paragraphs appear in | |
| 10 * all copies of this software. | |
| 11 * | |
| 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR | |
| 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES | |
| 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN | |
| 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | |
| 16 * DAMAGE. | |
| 17 * | |
| 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, | |
| 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO | |
| 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 23 */ | |
| 24 | |
| 25 #include "harfbuzz-shaper.h" | |
| 26 #include "harfbuzz-shaper-private.h" | |
| 27 #include "harfbuzz-external.h" | |
| 28 | |
| 29 #include <assert.h> | |
| 30 | |
| 31 static void thaiWordBreaks(const HB_UChar16 *string, hb_uint32 len, HB_CharAttri
butes *attributes) | |
| 32 { | |
| 33 typedef int (*th_brk_def)(const char*, int[], int); | |
| 34 static void *thaiCodec = 0; | |
| 35 static th_brk_def th_brk = 0; | |
| 36 char *cstr = 0; | |
| 37 int brp[128]; | |
| 38 int *break_positions = brp; | |
| 39 hb_uint32 numbreaks; | |
| 40 hb_uint32 i; | |
| 41 | |
| 42 if (!thaiCodec) | |
| 43 thaiCodec = HB_TextCodecForMib(2259); | |
| 44 | |
| 45 /* load libthai dynamically */ | |
| 46 if (!th_brk && thaiCodec) { | |
| 47 th_brk = (th_brk_def)HB_Library_Resolve("thai", "th_brk"); | |
| 48 if (!th_brk) | |
| 49 thaiCodec = 0; | |
| 50 } | |
| 51 | |
| 52 if (!th_brk) | |
| 53 return; | |
| 54 | |
| 55 cstr = HB_TextCodec_ConvertFromUnicode(thaiCodec, string, len, 0); | |
| 56 if (!cstr) | |
| 57 return; | |
| 58 | |
| 59 break_positions = brp; | |
| 60 numbreaks = th_brk(cstr, break_positions, 128); | |
| 61 if (numbreaks > 128) { | |
| 62 break_positions = (int *)malloc(numbreaks * sizeof(int)); | |
| 63 numbreaks = th_brk(cstr, break_positions, numbreaks); | |
| 64 } | |
| 65 | |
| 66 for (i = 0; i < len; ++i) | |
| 67 attributes[i].lineBreakType = HB_NoBreak; | |
| 68 | |
| 69 for (i = 0; i < numbreaks; ++i) { | |
| 70 if (break_positions[i] > 0) | |
| 71 attributes[break_positions[i]-1].lineBreakType = HB_Break; | |
| 72 } | |
| 73 | |
| 74 if (break_positions != brp) | |
| 75 free(break_positions); | |
| 76 | |
| 77 HB_TextCodec_FreeResult(cstr); | |
| 78 } | |
| 79 | |
| 80 | |
| 81 void HB_ThaiAttributes(HB_Script script, const HB_UChar16 *text, hb_uint32 from,
hb_uint32 len, HB_CharAttributes *attributes) | |
| 82 { | |
| 83 assert(script == HB_Script_Thai); | |
| 84 attributes += from; | |
| 85 thaiWordBreaks(text + from, len, attributes); | |
| 86 } | |
| 87 | |
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Chromium Code Reviews
Issue 384503008:
Delete third_party/harfbuzz (Closed)
Base URL: https://skia.googlesource.com/skia.git@master