diff options
Diffstat (limited to 'experimental/tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-greek.c')
-rw-r--r-- | experimental/tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-greek.c | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/experimental/tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-greek.c b/experimental/tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-greek.c new file mode 100644 index 000000000..2e9b858da --- /dev/null +++ b/experimental/tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-greek.c @@ -0,0 +1,447 @@ +/* + * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) + * + * This is part of HarfBuzz, an OpenType Layout engine library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + */ + +#include "harfbuzz-shaper.h" +#include "harfbuzz-shaper-private.h" +#include <assert.h> + +#ifndef NO_OPENTYPE +static const HB_OpenTypeFeature greek_features[] = { + { HB_MAKE_TAG('c', 'c', 'm', 'p'), CcmpProperty }, + { HB_MAKE_TAG('l', 'i', 'g', 'a'), CcmpProperty }, + { HB_MAKE_TAG('c', 'l', 'i', 'g'), CcmpProperty }, + {0, 0} +}; +#endif + +/* + Greek decompositions +*/ + + +typedef struct _hb_greek_decomposition { + HB_UChar16 composed; + HB_UChar16 base; +} hb_greek_decomposition; + +static const hb_greek_decomposition decompose_0x300[] = { + { 0x1FBA, 0x0391 }, + { 0x1FC8, 0x0395 }, + { 0x1FCA, 0x0397 }, + { 0x1FDA, 0x0399 }, + { 0x1FF8, 0x039F }, + { 0x1FEA, 0x03A5 }, + { 0x1FFA, 0x03A9 }, + { 0x1F70, 0x03B1 }, + { 0x1F72, 0x03B5 }, + { 0x1F74, 0x03B7 }, + { 0x1F76, 0x03B9 }, + { 0x1F78, 0x03BF }, + { 0x1F7A, 0x03C5 }, + { 0x1F7C, 0x03C9 }, + { 0x1FD2, 0x03CA }, + { 0x1FE2, 0x03CB }, + { 0x1F02, 0x1F00 }, + { 0, 0 } +}; + +static HB_UChar16 compose_0x300(HB_UChar16 base) +{ + if ((base ^ 0x1f00) < 0x100) { + if (base <= 0x1f69 && !(base & 0x6)) + return base + 2; + if (base == 0x1fbf) + return 0x1fcd; + if (base == 0x1ffe) + return 0x1fdd; + return 0; + } + { + const hb_greek_decomposition *d = decompose_0x300; + while (d->base && d->base != base) + ++d; + return d->composed; + } +} + +static const hb_greek_decomposition decompose_0x301[] = { + { 0x0386, 0x0391 }, + { 0x0388, 0x0395 }, + { 0x0389, 0x0397 }, + { 0x038A, 0x0399 }, + { 0x038C, 0x039F }, + { 0x038E, 0x03A5 }, + { 0x038F, 0x03A9 }, + { 0x03AC, 0x03B1 }, + { 0x03AD, 0x03B5 }, + { 0x03AE, 0x03B7 }, + { 0x03AF, 0x03B9 }, + { 0x03CC, 0x03BF }, + { 0x03CD, 0x03C5 }, + { 0x03CE, 0x03C9 }, + { 0x0390, 0x03CA }, + { 0x03B0, 0x03CB }, + { 0x03D3, 0x03D2 }, + { 0, 0 } +}; + + +static HB_UChar16 compose_0x301(HB_UChar16 base) +{ + if ((base ^ 0x1f00) < 0x100) { + if (base <= 0x1f69 && !(base & 0x6)) + return base + 4; + if (base == 0x1fbf) + return 0x1fce; + if (base == 0x1ffe) + return 0x1fde; + } + { + const hb_greek_decomposition *d = decompose_0x301; + while (d->base && d->base != base) + ++d; + return d->composed; + } +} + +static const hb_greek_decomposition decompose_0x304[] = { + { 0x1FB9, 0x0391 }, + { 0x1FD9, 0x0399 }, + { 0x1FE9, 0x03A5 }, + { 0x1FB1, 0x03B1 }, + { 0x1FD1, 0x03B9 }, + { 0x1FE1, 0x03C5 }, + { 0, 0 } +}; + +static HB_UChar16 compose_0x304(HB_UChar16 base) +{ + const hb_greek_decomposition *d = decompose_0x304; + while (d->base && d->base != base) + ++d; + return d->composed; +} + +static const hb_greek_decomposition decompose_0x306[] = { + { 0x1FB8, 0x0391 }, + { 0x1FD8, 0x0399 }, + { 0x1FE8, 0x03A5 }, + { 0x1FB0, 0x03B1 }, + { 0x1FD0, 0x03B9 }, + { 0x1FE0, 0x03C5 }, + { 0, 0 } +}; + +static HB_UChar16 compose_0x306(HB_UChar16 base) +{ + const hb_greek_decomposition *d = decompose_0x306; + while (d->base && d->base != base) + ++d; + return d->composed; +} + +static const hb_greek_decomposition decompose_0x308[] = { + { 0x03AA, 0x0399 }, + { 0x03AB, 0x03A5 }, + { 0x03CA, 0x03B9 }, + { 0x03CB, 0x03C5 }, + { 0x03D4, 0x03D2 }, + { 0, 0 } +}; + +static HB_UChar16 compose_0x308(HB_UChar16 base) +{ + const hb_greek_decomposition *d = decompose_0x308; + while (d->base && d->base != base) + ++d; + return d->composed; +} + + +static const hb_greek_decomposition decompose_0x313[] = { + { 0x1F08, 0x0391 }, + { 0x1F18, 0x0395 }, + { 0x1F28, 0x0397 }, + { 0x1F38, 0x0399 }, + { 0x1F48, 0x039F }, + { 0x1F68, 0x03A9 }, + { 0x1F00, 0x03B1 }, + { 0x1F10, 0x03B5 }, + { 0x1F20, 0x03B7 }, + { 0x1F30, 0x03B9 }, + { 0x1F40, 0x03BF }, + { 0x1FE4, 0x03C1 }, + { 0x1F50, 0x03C5 }, + { 0x1F60, 0x03C9 }, + { 0, 0 } +}; + +static HB_UChar16 compose_0x313(HB_UChar16 base) +{ + const hb_greek_decomposition *d = decompose_0x313; + while (d->base && d->base != base) + ++d; + return d->composed; +} + +static const hb_greek_decomposition decompose_0x314[] = { + { 0x1F09, 0x0391 }, + { 0x1F19, 0x0395 }, + { 0x1F29, 0x0397 }, + { 0x1F39, 0x0399 }, + { 0x1F49, 0x039F }, + { 0x1FEC, 0x03A1 }, + { 0x1F59, 0x03A5 }, + { 0x1F69, 0x03A9 }, + { 0x1F01, 0x03B1 }, + { 0x1F11, 0x03B5 }, + { 0x1F21, 0x03B7 }, + { 0x1F31, 0x03B9 }, + { 0x1F41, 0x03BF }, + { 0x1FE5, 0x03C1 }, + { 0x1F51, 0x03C5 }, + { 0x1F61, 0x03C9 }, + { 0, 0 } +}; + +static HB_UChar16 compose_0x314(HB_UChar16 base) +{ + const hb_greek_decomposition *d = decompose_0x314; + while (d->base && d->base != base) + ++d; + return d->composed; +} + +static const hb_greek_decomposition decompose_0x342[] = { + { 0x1FB6, 0x03B1 }, + { 0x1FC6, 0x03B7 }, + { 0x1FD6, 0x03B9 }, + { 0x1FE6, 0x03C5 }, + { 0x1FF6, 0x03C9 }, + { 0x1FD7, 0x03CA }, + { 0x1FE7, 0x03CB }, + { 0x1F06, 0x1F00 }, + { 0x1F07, 0x1F01 }, + { 0x1F0E, 0x1F08 }, + { 0x1F0F, 0x1F09 }, + { 0x1F26, 0x1F20 }, + { 0x1F27, 0x1F21 }, + { 0x1F2E, 0x1F28 }, + { 0x1F2F, 0x1F29 }, + { 0x1F36, 0x1F30 }, + { 0x1F37, 0x1F31 }, + { 0x1F3E, 0x1F38 }, + { 0x1F3F, 0x1F39 }, + { 0x1F56, 0x1F50 }, + { 0x1F57, 0x1F51 }, + { 0x1F5F, 0x1F59 }, + { 0x1F66, 0x1F60 }, + { 0x1F67, 0x1F61 }, + { 0x1F6E, 0x1F68 }, + { 0x1F6F, 0x1F69 }, + { 0x1FCF, 0x1FBF }, + { 0x1FDF, 0x1FFE }, + { 0, 0 } +}; + +static HB_UChar16 compose_0x342(HB_UChar16 base) +{ + const hb_greek_decomposition *d = decompose_0x342; + while (d->base && d->base != base) + ++d; + return d->composed; +} + +static const hb_greek_decomposition decompose_0x345[] = { + { 0x1FBC, 0x0391 }, + { 0x1FCC, 0x0397 }, + { 0x1FFC, 0x03A9 }, + { 0x1FB4, 0x03AC }, + { 0x1FC4, 0x03AE }, + { 0x1FB3, 0x03B1 }, + { 0x1FC3, 0x03B7 }, + { 0x1FF3, 0x03C9 }, + { 0x1FF4, 0x03CE }, + { 0x1F80, 0x1F00 }, + { 0x1F81, 0x1F01 }, + { 0x1F82, 0x1F02 }, + { 0x1F83, 0x1F03 }, + { 0x1F84, 0x1F04 }, + { 0x1F85, 0x1F05 }, + { 0x1F86, 0x1F06 }, + { 0x1F87, 0x1F07 }, + { 0x1F88, 0x1F08 }, + { 0x1F89, 0x1F09 }, + { 0x1F8A, 0x1F0A }, + { 0x1F8B, 0x1F0B }, + { 0x1F8C, 0x1F0C }, + { 0x1F8D, 0x1F0D }, + { 0x1F8E, 0x1F0E }, + { 0x1F8F, 0x1F0F }, + { 0x1F90, 0x1F20 }, + { 0x1F91, 0x1F21 }, + { 0x1F92, 0x1F22 }, + { 0x1F93, 0x1F23 }, + { 0x1F94, 0x1F24 }, + { 0x1F95, 0x1F25 }, + { 0x1F96, 0x1F26 }, + { 0x1F97, 0x1F27 }, + { 0x1F98, 0x1F28 }, + { 0x1F99, 0x1F29 }, + { 0x1F9A, 0x1F2A }, + { 0x1F9B, 0x1F2B }, + { 0x1F9C, 0x1F2C }, + { 0x1F9D, 0x1F2D }, + { 0x1F9E, 0x1F2E }, + { 0x1F9F, 0x1F2F }, + { 0x1FA0, 0x1F60 }, + { 0x1FA1, 0x1F61 }, + { 0x1FA2, 0x1F62 }, + { 0x1FA3, 0x1F63 }, + { 0x1FA4, 0x1F64 }, + { 0x1FA5, 0x1F65 }, + { 0x1FA6, 0x1F66 }, + { 0x1FA7, 0x1F67 }, + { 0x1FA8, 0x1F68 }, + { 0x1FA9, 0x1F69 }, + { 0x1FAA, 0x1F6A }, + { 0x1FAB, 0x1F6B }, + { 0x1FAC, 0x1F6C }, + { 0x1FAD, 0x1F6D }, + { 0x1FAE, 0x1F6E }, + { 0x1FAF, 0x1F6F }, + { 0x1FB2, 0x1F70 }, + { 0x1FC2, 0x1F74 }, + { 0x1FF2, 0x1F7C }, + { 0x1FB7, 0x1FB6 }, + { 0x1FC7, 0x1FC6 }, + { 0x1FF7, 0x1FF6 }, + { 0, 0 } +}; + +static HB_UChar16 compose_0x345(HB_UChar16 base) +{ + const hb_greek_decomposition *d = decompose_0x345; + while (d->base && d->base != base) + ++d; + return d->composed; +} + +/* + Greek shaping. Heuristic positioning can't render polytonic greek correctly. We're a lot + better off mapping greek chars with diacritics to the characters in the extended greek + region in Unicode if possible. +*/ +HB_Bool HB_GreekShape(HB_ShaperItem *shaper_item) +{ + const int availableGlyphs = shaper_item->num_glyphs; + const HB_UChar16 *uc = shaper_item->string + shaper_item->item.pos; + unsigned short *logClusters = shaper_item->log_clusters; + HB_GlyphAttributes *attributes = shaper_item->attributes; + + HB_Bool haveGlyphs; + int slen = 1; + int cluster_start = 0; + hb_uint32 i; + + HB_STACKARRAY(HB_UChar16, shapedChars, 2 * shaper_item->item.length); + + assert(shaper_item->item.script == HB_Script_Greek); + + *shapedChars = *uc; + logClusters[0] = 0; + + for (i = 1; i < shaper_item->item.length; ++i) { + hb_uint16 base = shapedChars[slen-1]; + hb_uint16 shaped = 0; + if (uc[i] == 0x300) + shaped = compose_0x300(base); + else if (uc[i] == 0x301) + shaped = compose_0x301(base); + else if (uc[i] == 0x304) + shaped = compose_0x304(base); + else if (uc[i] == 0x306) + shaped = compose_0x306(base); + else if (uc[i] == 0x308) + shaped = compose_0x308(base); + else if (uc[i] == 0x313) + shaped = compose_0x313(base); + else if (uc[i] == 0x314) + shaped = compose_0x314(base); + else if (uc[i] == 0x342) + shaped = compose_0x342(base); + else if (uc[i] == 0x345) + shaped = compose_0x345(base); + + if (shaped) { + if (shaper_item->font->klass->canRender(shaper_item->font, (HB_UChar16 *)&shaped, 1)) { + shapedChars[slen-1] = shaped; + } else { + shaped = 0; + } + } + + if (!shaped) { + HB_CharCategory category; + int cmb; + shapedChars[slen] = uc[i]; + HB_GetUnicodeCharProperties(uc[i], &category, &cmb); + if (category != HB_Mark_NonSpacing) { + attributes[slen].clusterStart = TRUE; + attributes[slen].mark = FALSE; + attributes[slen].combiningClass = 0; + attributes[slen].dontPrint = HB_IsControlChar(uc[i]); + cluster_start = slen; + } else { + attributes[slen].clusterStart = FALSE; + attributes[slen].mark = TRUE; + attributes[slen].combiningClass = cmb; + } + ++slen; + } + logClusters[i] = cluster_start; + } + + haveGlyphs = shaper_item->font->klass + ->convertStringToGlyphIndices(shaper_item->font, + shapedChars, slen, + shaper_item->glyphs, &shaper_item->num_glyphs, + shaper_item->item.bidiLevel % 2); + + HB_FREE_STACKARRAY(shapedChars); + + if (!haveGlyphs) + return FALSE; + +#ifndef NO_OPENTYPE + if (HB_SelectScript(shaper_item, greek_features)) { + HB_OpenTypeShape(shaper_item, /*properties*/0); + return HB_OpenTypePosition(shaper_item, availableGlyphs, /*doLogClusters*/TRUE); + } +#endif + HB_HeuristicPosition(shaper_item); + + return TRUE; +} + |