| /* |
| * (C) Copyright IBM Corp. 2002-2003 - All Rights Reserved |
| * |
| * $Source: /xsrl/Nsvn/icu/icu/source/layout/MPreFixups.cpp,v $ |
| * $Date: 2003/06/03 20:58:22 $ |
| * $Revision: 1.3 $ |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "MPreFixups.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| struct FixupData |
| { |
| le_int32 fBaseIndex; |
| le_int32 fMPreIndex; |
| }; |
| |
| MPreFixups::MPreFixups(le_int32 charCount) |
| : fFixupData(NULL), fFixupCount(0) |
| { |
| fFixupData = LE_NEW_ARRAY(FixupData, charCount); |
| } |
| |
| MPreFixups::~MPreFixups() |
| { |
| LE_DELETE_ARRAY(fFixupData); |
| fFixupData = NULL; |
| } |
| |
| void MPreFixups::add(le_int32 baseIndex, le_int32 mpreIndex) |
| { |
| // NOTE: don't add the fixup data if the mpre is right |
| // before the base consonant glyph. |
| if (baseIndex - mpreIndex > 1) { |
| fFixupData[fFixupCount].fBaseIndex = baseIndex; |
| fFixupData[fFixupCount].fMPreIndex = mpreIndex; |
| |
| fFixupCount += 1; |
| } |
| } |
| |
| void MPreFixups::apply(LEGlyphID *glyphs, le_int32 *charIndices) |
| { |
| for (le_int32 fixup = 0; fixup < fFixupCount; fixup += 1) { |
| le_int32 baseIndex = fFixupData[fixup].fBaseIndex; |
| le_int32 mpreIndex = fFixupData[fixup].fMPreIndex; |
| le_int32 mpreLimit = mpreIndex + 1; |
| |
| while (glyphs[baseIndex] == 0xFFFF || glyphs[baseIndex] == 0xFFFE) { |
| baseIndex -= 1; |
| } |
| |
| while (glyphs[mpreLimit] == 0xFFFF || glyphs[mpreLimit] == 0xFFFE) { |
| mpreLimit += 1; |
| } |
| |
| if (mpreLimit == baseIndex) { |
| continue; |
| } |
| |
| le_int32 mpreCount = mpreLimit - mpreIndex; |
| le_int32 moveCount = baseIndex - mpreLimit; |
| le_int32 mpreDest = baseIndex - mpreCount; |
| LEGlyphID *mpreSave = LE_NEW_ARRAY(LEGlyphID, mpreCount); |
| le_int32 *indexSave = LE_NEW_ARRAY(le_int32, mpreCount); |
| le_int32 i; |
| |
| for (i = 0; i < mpreCount; i += 1) { |
| mpreSave[i] = glyphs[mpreIndex + i]; |
| indexSave[i] = charIndices[mpreIndex + i]; |
| } |
| |
| for (i = 0; i < moveCount; i += 1) { |
| glyphs[mpreIndex + i] = glyphs[mpreLimit + i]; |
| charIndices[mpreIndex + i] = charIndices[mpreLimit + i]; |
| } |
| |
| for (i = 0; i < mpreCount; i += 1) { |
| glyphs[mpreDest + i] = mpreSave[i]; |
| charIndices[mpreDest + i] = indexSave[i]; |
| } |
| |
| LE_DELETE_ARRAY(indexSave); |
| LE_DELETE_ARRAY(mpreSave); |
| } |
| } |
| |
| U_NAMESPACE_END |