/*
*
- * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
+ * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
*
*/
#include "OpenTypeTables.h"
#include "ArabicShaping.h"
#include "LEGlyphStorage.h"
+#include "ClassDefinitionTables.h"
U_NAMESPACE_BEGIN
-enum {
- _c_ = ArabicShaping::ST_NOSHAPE_DUAL,
- _d_ = ArabicShaping::ST_DUAL,
- _n_ = ArabicShaping::ST_NONE,
- _r_ = ArabicShaping::ST_RIGHT,
- _t_ = ArabicShaping::ST_TRANSPARENT,
- _x_ = ArabicShaping::ST_NOSHAPE_NONE
-};
-
+// This table maps Unicode joining types to
+// ShapeTypes.
const ArabicShaping::ShapeType ArabicShaping::shapeTypes[] =
{
- _t_, _t_, _t_, _t_, _t_, _t_, _x_, _x_, _x_, _x_, _x_, _n_, _x_, _x_, _x_, _n_, // 0x610 - 0x61f
- _x_, _n_, _r_, _r_, _r_, _r_, _d_, _r_, _d_, _r_, _d_, _d_, _d_, _d_, _d_, _r_, // 0x620 - 0x62f
- _r_, _r_, _r_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _x_, _x_, _x_, _x_, _x_, // 0x630 - 0x63f
- _c_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _r_, _d_, _d_, _t_, _t_, _t_, _t_, _t_, // 0x640 - 0x64f
- _t_, _t_, _t_, _t_, _t_, _t_, _t_, _t_, _t_, _x_, _x_, _x_, _x_, _x_, _x_, _x_, // 0x650 - 0x65f
- _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _d_, _d_, // 0x660 - 0x66f
- _t_, _r_, _r_, _r_, _n_, _r_, _r_, _r_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, // 0x670 - 0x67f
- _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, // 0x680 - 0x68f
- _r_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, _d_, _d_, _d_, _d_, _d_, _d_, // 0x690 - 0x69f
- _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, // 0x6a0 - 0x6af
- _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, _d_, // 0x6b0 - 0x6bf
- _r_, _d_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, _r_, _d_, _r_, _d_, _r_, // 0x6c0 - 0x6cf
- _d_, _d_, _r_, _r_, _n_, _r_, _t_, _t_, _t_, _t_, _t_, _t_, _t_, _x_, _t_, _t_, // 0x6d0 - 0x6df
- _t_, _t_, _t_, _t_, _t_, _n_, _n_, _t_, _t_, _n_, _t_, _t_, _t_, _t_, _r_, _r_, // 0x6e0 - 0x6ef
- _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _n_, _d_, _d_, _d_, _n_, _n_, _d_ // 0x6f0 - 0x6ff
+ ArabicShaping::ST_NOSHAPE_NONE, // [U]
+ ArabicShaping::ST_NOSHAPE_DUAL, // [C]
+ ArabicShaping::ST_DUAL, // [D]
+ ArabicShaping::ST_LEFT, // [L]
+ ArabicShaping::ST_RIGHT, // [R]
+ ArabicShaping::ST_TRANSPARENT // [T]
};
/*
*/
ArabicShaping::ShapeType ArabicShaping::getShapeType(LEUnicode c)
{
- if (c >= 0x0610 && c <= 0x206f) {
- if (c < 0x0700) {
- return shapeTypes[c - 0x0610];
- } else if (c == 0x200c) { // ZWNJ
- return ST_NOSHAPE_NONE;
- } else if (c == 0x200d) { // ZWJ
- return ST_NOSHAPE_DUAL;
- } else if (c >= 0x202a && c <= 0x202e) { // LRE - RLO
- return ST_TRANSPARENT;
- } else if (c >= 0x206a && c <= 0x206f) { // Inhibit Symmetric Swapping - Nominal Digit Shapes
- return ST_TRANSPARENT;
- }
+ const ClassDefinitionTable *joiningTypes = (const ClassDefinitionTable *) ArabicShaping::shapingTypeTable;
+ le_int32 joiningType = joiningTypes->getGlyphClass(c);
+
+ if (joiningType >= 0 && joiningType < ArabicShaping::JT_COUNT) {
+ return ArabicShaping::shapeTypes[joiningType];
}
- return ST_NOSHAPE_NONE;
+ return ArabicShaping::ST_NOSHAPE_NONE;
}
-static const LETag isolFeatureTag = LE_ISOL_FEATURE_TAG;
-static const LETag initFeatureTag = LE_INIT_FEATURE_TAG;
-static const LETag mediFeatureTag = LE_MEDI_FEATURE_TAG;
-static const LETag finaFeatureTag = LE_FINA_FEATURE_TAG;
-static const LETag ligaFeatureTag = LE_LIGA_FEATURE_TAG;
-static const LETag msetFeatureTag = LE_MSET_FEATURE_TAG;
-static const LETag markFeatureTag = LE_MARK_FEATURE_TAG;
-static const LETag ccmpFeatureTag = LE_CCMP_FEATURE_TAG;
-static const LETag rligFeatureTag = LE_RLIG_FEATURE_TAG;
-static const LETag caltFeatureTag = LE_CALT_FEATURE_TAG;
-static const LETag dligFeatureTag = LE_DLIG_FEATURE_TAG;
-static const LETag cswhFeatureTag = LE_CSWH_FEATURE_TAG;
-static const LETag cursFeatureTag = LE_CURS_FEATURE_TAG;
-static const LETag kernFeatureTag = LE_KERN_FEATURE_TAG;
-static const LETag mkmkFeatureTag = LE_MKMK_FEATURE_TAG;
-
-static const LETag emptyTag = 0x00000000; // ''
-
-static const LETag featureOrder[] =
-{
- ccmpFeatureTag, isolFeatureTag, finaFeatureTag, mediFeatureTag, initFeatureTag, rligFeatureTag,
- caltFeatureTag, ligaFeatureTag, dligFeatureTag, cswhFeatureTag, msetFeatureTag, cursFeatureTag,
- kernFeatureTag, markFeatureTag, mkmkFeatureTag, emptyTag
+#define isolFeatureTag LE_ISOL_FEATURE_TAG
+#define initFeatureTag LE_INIT_FEATURE_TAG
+#define mediFeatureTag LE_MEDI_FEATURE_TAG
+#define finaFeatureTag LE_FINA_FEATURE_TAG
+#define ligaFeatureTag LE_LIGA_FEATURE_TAG
+#define msetFeatureTag LE_MSET_FEATURE_TAG
+#define markFeatureTag LE_MARK_FEATURE_TAG
+#define ccmpFeatureTag LE_CCMP_FEATURE_TAG
+#define rligFeatureTag LE_RLIG_FEATURE_TAG
+#define caltFeatureTag LE_CALT_FEATURE_TAG
+#define dligFeatureTag LE_DLIG_FEATURE_TAG
+#define cswhFeatureTag LE_CSWH_FEATURE_TAG
+#define cursFeatureTag LE_CURS_FEATURE_TAG
+#define kernFeatureTag LE_KERN_FEATURE_TAG
+#define mkmkFeatureTag LE_MKMK_FEATURE_TAG
+
+// NOTE:
+// The isol, fina, init and medi features must be
+// defined in the above order, and have masks that
+// are all in the same nibble.
+#define isolFeatureMask 0x80000000UL
+#define finaFeatureMask 0x40000000UL
+#define initFeatureMask 0x20000000UL
+#define mediFeatureMask 0x10000000UL
+#define ccmpFeatureMask 0x08000000UL
+#define rligFeatureMask 0x04000000UL
+#define caltFeatureMask 0x02000000UL
+#define ligaFeatureMask 0x01000000UL
+#define dligFeatureMask 0x00800000UL
+#define cswhFeatureMask 0x00400000UL
+#define msetFeatureMask 0x00200000UL
+#define cursFeatureMask 0x00100000UL
+#define kernFeatureMask 0x00080000UL
+#define markFeatureMask 0x00040000UL
+#define mkmkFeatureMask 0x00020000UL
+
+#define ISOL_FEATURES (isolFeatureMask | ligaFeatureMask | msetFeatureMask | markFeatureMask | ccmpFeatureMask | rligFeatureMask | caltFeatureMask | dligFeatureMask | cswhFeatureMask | cursFeatureMask | kernFeatureMask | mkmkFeatureMask)
+
+#define SHAPE_MASK 0xF0000000UL
+
+static const FeatureMap featureMap[] = {
+ {ccmpFeatureTag, ccmpFeatureMask},
+ {isolFeatureTag, isolFeatureMask},
+ {finaFeatureTag, finaFeatureMask},
+ {mediFeatureTag, mediFeatureMask},
+ {initFeatureTag, initFeatureMask},
+ {rligFeatureTag, rligFeatureMask},
+ {caltFeatureTag, caltFeatureMask},
+ {ligaFeatureTag, ligaFeatureMask},
+ {dligFeatureTag, dligFeatureMask},
+ {cswhFeatureTag, cswhFeatureMask},
+ {msetFeatureTag, msetFeatureMask},
+ {cursFeatureTag, cursFeatureMask},
+ {kernFeatureTag, kernFeatureMask},
+ {markFeatureTag, markFeatureMask},
+ {mkmkFeatureTag, mkmkFeatureMask}
};
-const LETag ArabicShaping::tagArray[] =
+const FeatureMap *ArabicShaping::getFeatureMap(le_int32 &count)
{
- isolFeatureTag, ligaFeatureTag, msetFeatureTag, markFeatureTag, ccmpFeatureTag, rligFeatureTag,
- caltFeatureTag, dligFeatureTag, cswhFeatureTag, cursFeatureTag, kernFeatureTag, mkmkFeatureTag, emptyTag,
-
- finaFeatureTag, ligaFeatureTag, msetFeatureTag, markFeatureTag, ccmpFeatureTag, rligFeatureTag,
- caltFeatureTag, dligFeatureTag, cswhFeatureTag, cursFeatureTag, kernFeatureTag, mkmkFeatureTag, emptyTag,
+ count = LE_ARRAY_SIZE(featureMap);
- initFeatureTag, ligaFeatureTag, msetFeatureTag, markFeatureTag, ccmpFeatureTag, rligFeatureTag,
- caltFeatureTag, dligFeatureTag, cswhFeatureTag, cursFeatureTag, kernFeatureTag, mkmkFeatureTag, emptyTag,
-
- mediFeatureTag, ligaFeatureTag, msetFeatureTag, markFeatureTag, ccmpFeatureTag, rligFeatureTag,
- caltFeatureTag, dligFeatureTag, cswhFeatureTag, cursFeatureTag, kernFeatureTag, mkmkFeatureTag, emptyTag
-};
-
-#define TAGS_PER_GLYPH ((sizeof ArabicShaping::tagArray / sizeof ArabicShaping::tagArray[0]) / 4)
-
-const LETag *ArabicShaping::getFeatureOrder()
-{
- return featureOrder;
+ return featureMap;
}
void ArabicShaping::adjustTags(le_int32 outIndex, le_int32 shapeOffset, LEGlyphStorage &glyphStorage)
{
LEErrorCode success = LE_NO_ERROR;
- const LETag *glyphTags = (const LETag *) glyphStorage.getAuxData(outIndex, success);
+ FeatureMask featureMask = (FeatureMask) glyphStorage.getAuxData(outIndex, success);
+ FeatureMask shape = featureMask & SHAPE_MASK;
+
+ shape >>= shapeOffset;
- glyphStorage.setAuxData(outIndex, (void *) &glyphTags[TAGS_PER_GLYPH * shapeOffset], success);
+ glyphStorage.setAuxData(outIndex, ((featureMask & ~SHAPE_MASK) | shape), success);
}
void ArabicShaping::shape(const LEUnicode *chars, le_int32 offset, le_int32 charCount, le_int32 charMax,
LEUnicode c = chars[in];
ShapeType t = getShapeType(c);
- glyphStorage.setAuxData(out, (void *) tagArray, success);
+ glyphStorage.setAuxData(out, ISOL_FEATURES, success);
if ((t & MASK_TRANSPARENT) != 0) {
continue;
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