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/*
*
* (C) Copyright IBM Corp. 2002-2008 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "LEGlyphStorage.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(LEGlyphStorage &glyphStorage, LEErrorCode& success)
{
if (LE_FAILURE(success)) {
return;
}
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 (glyphStorage[baseIndex] == 0xFFFF || glyphStorage[baseIndex] == 0xFFFE) {
baseIndex -= 1;
}
while (glyphStorage[mpreLimit] == 0xFFFF || glyphStorage[mpreLimit] == 0xFFFE) {
mpreLimit += 1;
}
if (mpreLimit == baseIndex) {
continue;
}
LEErrorCode success = LE_NO_ERROR;
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);
if (mpreSave == NULL || indexSave == NULL) {
LE_DELETE_ARRAY(mpreSave);
LE_DELETE_ARRAY(indexSave);
success = LE_MEMORY_ALLOCATION_ERROR;
return;
}
le_int32 i;
for (i = 0; i < mpreCount; i += 1) {
mpreSave[i] = glyphStorage[mpreIndex + i];
indexSave[i] = glyphStorage.getCharIndex(mpreIndex + i, success); //charIndices[mpreIndex + i];
}
for (i = 0; i < moveCount; i += 1) {
LEGlyphID glyph = glyphStorage[mpreLimit + i];
le_int32 charIndex = glyphStorage.getCharIndex(mpreLimit + i, success);
glyphStorage[mpreIndex + i] = glyph;
glyphStorage.setCharIndex(mpreIndex + i, charIndex, success);
}
for (i = 0; i < mpreCount; i += 1) {
glyphStorage[mpreDest + i] = mpreSave[i];
glyphStorage.setCharIndex(mpreDest, indexSave[i], success);
}
LE_DELETE_ARRAY(indexSave);
LE_DELETE_ARRAY(mpreSave);
}
}
U_NAMESPACE_END
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