diff options
author | Lars Knoll <lars.knoll@nokia.com> | 2009-11-05 22:59:03 +0100 |
---|---|---|
committer | Lars Knoll <lars.knoll@nokia.com> | 2009-11-05 22:59:03 +0100 |
commit | aee5ca262692519ef4408cd1c07b742355ce07d0 (patch) | |
tree | 795fe03576112db16d84f9cabeb3edb02320167f | |
parent | b90ffbace5536786eafe23e28ec3eee74c7c4e27 (diff) |
add support for N'Ko
Extend the arabic shaping module to also support N'Ko.
-rw-r--r-- | src/harfbuzz-arabic.c | 60 | ||||
-rw-r--r-- | src/harfbuzz-shaper.cpp | 8 | ||||
-rw-r--r-- | src/harfbuzz-shaper.h | 2 | ||||
-rw-r--r-- | tests/shaping/main.cpp | 35 |
4 files changed, 99 insertions, 6 deletions
diff --git a/src/harfbuzz-arabic.c b/src/harfbuzz-arabic.c index 4d85c19..3837087 100644 --- a/src/harfbuzz-arabic.c +++ b/src/harfbuzz-arabic.c @@ -489,6 +489,56 @@ static void getArabicProperties(const unsigned short *chars, int len, HB_ArabicP */ } +static Joining getNkoJoining(unsigned short uc) +{ + if (uc < 0x7ca) + return JNone; + if (uc <= 0x7ea) + return JDual; + if (uc <= 0x7f3) + return JTransparent; + if (uc <= 0x7f9) + return JNone; + if (uc == 0x7fa) + return JCausing; + return JNone; +} + +static void getNkoProperties(const unsigned short *chars, int len, HB_ArabicProperties *properties) +{ + int lastPos = 0; + int i = 0; + + Joining j = getNkoJoining(chars[0]); + ArabicShape shape = joining_table[XIsolated][j].form2; + properties[0].justification = HB_NoJustification; + + for (i = 1; i < len; ++i) { + properties[i].justification = (HB_GetUnicodeCharCategory(chars[i]) == HB_Separator_Space) ? + ArabicSpace : ArabicNone; + + j = getNkoJoining(chars[i]); + + if (j == JTransparent) { + properties[i].shape = XIsolated; + continue; + } + + properties[lastPos].shape = joining_table[shape][j].form1; + shape = joining_table[shape][j].form2; + + + lastPos = i; + } + properties[lastPos].shape = joining_table[shape][JNone].form1; + + + /* + for (int i = 0; i < len; ++i) + qDebug("nko properties(%d): uc=%x shape=%d, justification=%d", i, chars[i], properties[i].shape, properties[i].justification); + */ +} + /* // The unicode to unicode shaping codec. // does only presentation forms B at the moment, but that should be enough for @@ -1012,7 +1062,10 @@ static HB_Bool arabicSyriacOpenTypeShape(HB_ShaperItem *item, HB_Bool *ot_ok) if (f + l + item->item.pos < item->stringLength) { ++l; } - getArabicProperties(uc+f, l, props); + if (item->item.script == HB_Script_Nko) + getNkoProperties(uc+f, l, props); + else + getArabicProperties(uc+f, l, props); for (i = 0; i < (int)item->num_glyphs; i++) { apply[i] = 0; @@ -1051,7 +1104,8 @@ HB_Bool HB_ArabicShape(HB_ShaperItem *item) HB_Bool haveGlyphs; HB_STACKARRAY(HB_UChar16, shapedChars, item->item.length); - assert(item->item.script == HB_Script_Arabic || item->item.script == HB_Script_Syriac); + assert(item->item.script == HB_Script_Arabic || item->item.script == HB_Script_Syriac + || item->item.script == HB_Script_Nko); #ifndef NO_OPENTYPE @@ -1065,7 +1119,7 @@ HB_Bool HB_ArabicShape(HB_ShaperItem *item) } #endif - if (item->item.script == HB_Script_Syriac) + if (item->item.script != HB_Script_Arabic) return HB_BasicShape(item); shapedString(item->string, item->stringLength, item->item.pos, item->item.length, shapedChars, &slen, diff --git a/src/harfbuzz-shaper.cpp b/src/harfbuzz-shaper.cpp index 36b9282..62bfba1 100644 --- a/src/harfbuzz-shaper.cpp +++ b/src/harfbuzz-shaper.cpp @@ -637,7 +637,9 @@ const HB_ScriptEngine HB_ScriptEngines[] = { // Runic { HB_BasicShape, 0 }, // Khmer - { HB_KhmerShape, HB_KhmerAttributes } + { HB_KhmerShape, HB_KhmerAttributes }, + // N'Ko + { HB_ArabicShape, 0} }; void HB_GetCharAttributes(const HB_UChar16 *string, hb_uint32 stringLength, @@ -877,7 +879,9 @@ static const OTScripts ot_scripts [] = { // Runic { HB_MAKE_TAG('r', 'u', 'n', 'r'), 0 }, // Khmer - { HB_MAKE_TAG('k', 'h', 'm', 'r'), 1 } + { HB_MAKE_TAG('k', 'h', 'm', 'r'), 1 }, + // N'Ko + { HB_MAKE_TAG('n', 'k', 'o', ' '), 1 } }; enum { NumOTScripts = sizeof(ot_scripts)/sizeof(OTScripts) }; diff --git a/src/harfbuzz-shaper.h b/src/harfbuzz-shaper.h index d2357f4..f7c7714 100644 --- a/src/harfbuzz-shaper.h +++ b/src/harfbuzz-shaper.h @@ -62,6 +62,7 @@ typedef enum { HB_Script_Ogham, HB_Script_Runic, HB_Script_Khmer, + HB_Script_Nko, HB_Script_Inherited, HB_ScriptCount = HB_Script_Inherited /* @@ -102,7 +103,6 @@ typedef enum { HB_Script_Cuneiform = Common, HB_Script_Phoenician = Common, HB_Script_PhagsPa = Common, - HB_Script_Nko = Common */ } HB_Script; diff --git a/tests/shaping/main.cpp b/tests/shaping/main.cpp index 1a3ef4f..3b5148d 100644 --- a/tests/shaping/main.cpp +++ b/tests/shaping/main.cpp @@ -181,6 +181,7 @@ private slots: // sinhala missing void khmer(); + void nko(); void linearB(); }; @@ -1005,6 +1006,40 @@ void tst_QScriptEngine::khmer() } } +void tst_QScriptEngine::nko() +{ + { + FT_Face face = loadFace("DejaVuSans.ttf"); + if (face) { + const ShapeTable shape_table [] = { + { { 0x7ca, 0x0 }, + { 0x5c1, 0x0 } }, + { { 0x7ca, 0x7ca, 0x0 }, + { 0x14db, 0x14d9, 0x0 } }, + { { 0x7ca, 0x7fa, 0x7ca, 0x0 }, + { 0x14db, 0x5ec, 0x14d9, 0x0 } }, + { { 0x7ca, 0x7f3, 0x7ca, 0x0 }, + { 0x14db, 0x5e7, 0x14d9, 0x0 } }, + { { 0x7ca, 0x7f3, 0x7fa, 0x7ca, 0x0 }, + { 0x14db, 0x5e7, 0x5ec, 0x14d9, 0x0 } }, + { {0}, {0} } + }; + + + const ShapeTable *s = shape_table; + while (s->unicode[0]) { + QVERIFY( shaping(face, s, HB_Script_Nko) ); + ++s; + } + + FT_Done_Face(face); + } else { + QSKIP("couln't find DejaVuSans.ttf", SkipAll); + } + } +} + + void tst_QScriptEngine::linearB() { { |