| OLD | NEW |
|---|
| (Empty) |
| 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 #include <stdio.h> | |
| 31 | |
| 32 typedef int (*th_brk_def)(const char*, int[], int); | |
| 33 static th_brk_def th_brk = 0; | |
| 34 static int libthai_resolved = 0; | |
| 35 | |
| 36 static void resolve_libthai() | |
| 37 { | |
| 38 if (!th_brk) | |
| 39 th_brk = (th_brk_def)HB_Library_Resolve("thai", 0, "th_brk"); | |
| 40 libthai_resolved = 1; | |
| 41 } | |
| 42 | |
| 43 static void to_tis620(const HB_UChar16 *string, hb_uint32 len, const char *cstr) | |
| 44 { | |
| 45 hb_uint32 i; | |
| 46 unsigned char *result = (unsigned char *)cstr; | |
| 47 | |
| 48 for (i = 0; i < len; ++i) { | |
| 49 if (string[i] <= 0xa0) | |
| 50 result[i] = (unsigned char)string[i]; | |
| 51 if (string[i] >= 0xe01 && string[i] <= 0xe5b) | |
| 52 result[i] = (unsigned char)(string[i] - 0xe00 + 0xa0); | |
| 53 else | |
| 54 result[i] = '?'; | |
| 55 } | |
| 56 | |
| 57 result[len] = 0; | |
| 58 } | |
| 59 | |
| 60 static void thaiWordBreaks(const HB_UChar16 *string, hb_uint32 len, HB_CharAttri
butes *attributes) | |
| 61 { | |
| 62 char s[128]; | |
| 63 char *cstr = s; | |
| 64 int brp[128]; | |
| 65 int *break_positions = brp; | |
| 66 hb_uint32 numbreaks; | |
| 67 hb_uint32 i; | |
| 68 | |
| 69 if (!libthai_resolved) | |
| 70 resolve_libthai(); | |
| 71 | |
| 72 if (!th_brk) | |
| 73 return; | |
| 74 | |
| 75 if (len >= 128) | |
| 76 cstr = (char *)malloc(len*sizeof(char) + 1); | |
| 77 | |
| 78 to_tis620(string, len, cstr); | |
| 79 | |
| 80 numbreaks = th_brk(cstr, break_positions, 128); | |
| 81 if (numbreaks > 128) { | |
| 82 break_positions = (int *)malloc(numbreaks * sizeof(int)); | |
| 83 numbreaks = th_brk(cstr, break_positions, numbreaks); | |
| 84 } | |
| 85 | |
| 86 for (i = 0; i < len; ++i) { | |
| 87 attributes[i].lineBreakType = HB_NoBreak; | |
| 88 attributes[i].wordBoundary = FALSE; | |
| 89 } | |
| 90 | |
| 91 for (i = 0; i < numbreaks; ++i) { | |
| 92 if (break_positions[i] > 0) { | |
| 93 attributes[break_positions[i]-1].lineBreakType = HB_Break; | |
| 94 attributes[break_positions[i]-1].wordBoundary = TRUE; | |
| 95 } | |
| 96 } | |
| 97 | |
| 98 if (break_positions != brp) | |
| 99 free(break_positions); | |
| 100 | |
| 101 if (len >= 128) | |
| 102 free(cstr); | |
| 103 } | |
| 104 | |
| 105 void HB_ThaiAttributes(HB_Script script, const HB_UChar16 *text, hb_uint32 from,
hb_uint32 len, HB_CharAttributes *attributes) | |
| 106 { | |
| 107 assert(script == HB_Script_Thai); | |
| 108 attributes += from; | |
| 109 thaiWordBreaks(text + from, len, attributes); | |
| 110 } | |
| 111 | |
| OLD | NEW |
|---|
Chromium Code Reviews
