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