1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/textandloc/fontservices/textshaperplugin/IcuSource/layout/KhmerLayoutEngine.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,80 @@
     1.4 +
     1.5 +/*
     1.6 + *
     1.7 + * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved 
     1.8 + *
     1.9 + * This file is a modification of the ICU file IndicLayoutEngine.cpp
    1.10 + * by Jens Herden and Javier Sola for Khmer language 
    1.11 + *
    1.12 + */
    1.13 +
    1.14 +
    1.15 +#include "OpenTypeLayoutEngine.h"
    1.16 +#include "KhmerLayoutEngine.h"
    1.17 +#include "LEGlyphStorage.h"
    1.18 +#include "KhmerReordering.h"
    1.19 +
    1.20 +U_NAMESPACE_BEGIN
    1.21 +
    1.22 +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(KhmerOpenTypeLayoutEngine)
    1.23 +
    1.24 +KhmerOpenTypeLayoutEngine::KhmerOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
    1.25 +                    le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable)
    1.26 +    : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable)
    1.27 +{
    1.28 +    fFeatureOrder = KhmerReordering::getFeatureOrder();
    1.29 +}
    1.30 +
    1.31 +KhmerOpenTypeLayoutEngine::KhmerOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
    1.32 +						     le_int32 typoFlags)
    1.33 +    : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags)
    1.34 +{
    1.35 +    fFeatureOrder = KhmerReordering::getFeatureOrder();
    1.36 +}
    1.37 +
    1.38 +KhmerOpenTypeLayoutEngine::~KhmerOpenTypeLayoutEngine()
    1.39 +{
    1.40 +    // nothing to do
    1.41 +}
    1.42 +
    1.43 +// Input: characters
    1.44 +// Output: characters, char indices, tags
    1.45 +// Returns: output character count
    1.46 +le_int32 KhmerOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
    1.47 +        LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success)
    1.48 +{
    1.49 +    if (LE_FAILURE(success)) {
    1.50 +        return 0;
    1.51 +    }
    1.52 +
    1.53 +    if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
    1.54 +        success = LE_ILLEGAL_ARGUMENT_ERROR;
    1.55 +        return 0;
    1.56 +    }
    1.57 +
    1.58 +    le_int32 worstCase = count * 3;  // worst case is 3 for Khmer  TODO check if 2 is enough
    1.59 +
    1.60 +    outChars = LE_NEW_ARRAY(LEUnicode, worstCase);
    1.61 +
    1.62 +    if (outChars == NULL) {
    1.63 +        success = LE_MEMORY_ALLOCATION_ERROR;
    1.64 +        return 0;
    1.65 +    }
    1.66 +
    1.67 +    glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success);
    1.68 +    glyphStorage.allocateAuxData(success);
    1.69 +
    1.70 +    if (LE_FAILURE(success)) {
    1.71 +        LE_DELETE_ARRAY(outChars);
    1.72 +        return 0;
    1.73 +    }
    1.74 +
    1.75 +    // NOTE: assumes this allocates featureTags...
    1.76 +    // (probably better than doing the worst case stuff here...)
    1.77 +    le_int32 outCharCount = KhmerReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage);
    1.78 +
    1.79 +    glyphStorage.adoptGlyphCount(outCharCount);
    1.80 +    return outCharCount;
    1.81 +}
    1.82 +
    1.83 +U_NAMESPACE_END