115 lines
3.5 KiB
C++
115 lines
3.5 KiB
C++
|
|
/*
|
|
*
|
|
* (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
|
|
*
|
|
*/
|
|
|
|
#include "LETypes.h"
|
|
#include "LayoutEngine.h"
|
|
#include "OpenTypeLayoutEngine.h"
|
|
#include "IndicLayoutEngine.h"
|
|
#include "ScriptAndLanguageTags.h"
|
|
|
|
#include "GlyphSubstitutionTables.h"
|
|
#include "GlyphDefinitionTables.h"
|
|
#include "GlyphPositioningTables.h"
|
|
|
|
#include "GDEFMarkFilter.h"
|
|
#include "LEGlyphStorage.h"
|
|
|
|
#include "IndicReordering.h"
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IndicOpenTypeLayoutEngine)
|
|
|
|
IndicOpenTypeLayoutEngine::IndicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
|
|
le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable)
|
|
: OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable), fMPreFixups(NULL)
|
|
{
|
|
fFeatureMap = IndicReordering::getFeatureMap(fFeatureMapCount);
|
|
fFeatureOrder = TRUE;
|
|
|
|
fFilterZeroWidth = IndicReordering::getFilterZeroWidth(fScriptCode);
|
|
}
|
|
|
|
IndicOpenTypeLayoutEngine::IndicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags)
|
|
: OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags), fMPreFixups(NULL)
|
|
{
|
|
fFeatureMap = IndicReordering::getFeatureMap(fFeatureMapCount);
|
|
fFeatureOrder = TRUE;
|
|
}
|
|
|
|
IndicOpenTypeLayoutEngine::~IndicOpenTypeLayoutEngine()
|
|
{
|
|
// nothing to do
|
|
}
|
|
|
|
// Input: characters, tags
|
|
// Output: glyphs, char indices
|
|
le_int32 IndicOpenTypeLayoutEngine::glyphProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
|
|
LEGlyphStorage &glyphStorage, LEErrorCode &success)
|
|
{
|
|
if (LE_FAILURE(success)) {
|
|
return 0;
|
|
}
|
|
|
|
if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
|
|
success = LE_ILLEGAL_ARGUMENT_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
le_int32 retCount = OpenTypeLayoutEngine::glyphProcessing(chars, offset, count, max, rightToLeft, glyphStorage, success);
|
|
|
|
if (LE_FAILURE(success)) {
|
|
return 0;
|
|
}
|
|
|
|
IndicReordering::adjustMPres(fMPreFixups, glyphStorage);
|
|
|
|
return retCount;
|
|
}
|
|
|
|
// Input: characters
|
|
// Output: characters, char indices, tags
|
|
// Returns: output character count
|
|
le_int32 IndicOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
|
|
LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success)
|
|
{
|
|
if (LE_FAILURE(success)) {
|
|
return 0;
|
|
}
|
|
|
|
if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
|
|
success = LE_ILLEGAL_ARGUMENT_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
le_int32 worstCase = count * IndicReordering::getWorstCaseExpansion(fScriptCode);
|
|
|
|
outChars = LE_NEW_ARRAY(LEUnicode, worstCase);
|
|
|
|
if (outChars == NULL) {
|
|
success = LE_MEMORY_ALLOCATION_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success);
|
|
glyphStorage.allocateAuxData(success);
|
|
|
|
if (LE_FAILURE(success)) {
|
|
LE_DELETE_ARRAY(outChars);
|
|
return 0;
|
|
}
|
|
|
|
// NOTE: assumes this allocates featureTags...
|
|
// (probably better than doing the worst case stuff here...)
|
|
le_int32 outCharCount = IndicReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage, &fMPreFixups);
|
|
|
|
glyphStorage.adoptGlyphCount(outCharCount);
|
|
return outCharCount;
|
|
}
|
|
|
|
U_NAMESPACE_END
|