108 lines
3.0 KiB
C++
108 lines
3.0 KiB
C++
// Copyright (C) 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*
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* (C) Copyright IBM Corp. 2002-2008 - All Rights Reserved
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*
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*/
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#include "LETypes.h"
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#include "LEGlyphStorage.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(LEGlyphStorage &glyphStorage, LEErrorCode& success)
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{
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if (LE_FAILURE(success)) {
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return;
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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 (glyphStorage[baseIndex] == 0xFFFF || glyphStorage[baseIndex] == 0xFFFE) {
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baseIndex -= 1;
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}
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while (glyphStorage[mpreLimit] == 0xFFFF || glyphStorage[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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LEErrorCode success = LE_NO_ERROR;
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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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if (mpreSave == NULL || indexSave == NULL) {
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LE_DELETE_ARRAY(mpreSave);
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LE_DELETE_ARRAY(indexSave);
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success = LE_MEMORY_ALLOCATION_ERROR;
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return;
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}
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le_int32 i;
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for (i = 0; i < mpreCount; i += 1) {
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mpreSave[i] = glyphStorage[mpreIndex + i];
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indexSave[i] = glyphStorage.getCharIndex(mpreIndex + i, success); //charIndices[mpreIndex + i];
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}
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for (i = 0; i < moveCount; i += 1) {
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LEGlyphID glyph = glyphStorage[mpreLimit + i];
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le_int32 charIndex = glyphStorage.getCharIndex(mpreLimit + i, success);
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glyphStorage[mpreIndex + i] = glyph;
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glyphStorage.setCharIndex(mpreIndex + i, charIndex, success);
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}
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for (i = 0; i < mpreCount; i += 1) {
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glyphStorage[mpreDest + i] = mpreSave[i];
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glyphStorage.setCharIndex(mpreDest, indexSave[i], success);
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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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