-
-/*
- *
- * (C) Copyright IBM Corp. 1998-2013 - 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, le_bool version2, const LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable, LEErrorCode &success)
- : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success), fMPreFixups(NULL)
-{
- if ( version2 ) {
- fFeatureMap = IndicReordering::getv2FeatureMap(fFeatureMapCount);
- } else {
- fFeatureMap = IndicReordering::getFeatureMap(fFeatureMapCount);
- }
- fFeatureOrder = TRUE;
- fVersion2 = version2;
- fFilterZeroWidth = IndicReordering::getFilterZeroWidth(fScriptCode);
-}
-
-IndicOpenTypeLayoutEngine::IndicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success)
- : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fMPreFixups(NULL)
-{
- fFeatureMap = IndicReordering::getFeatureMap(fFeatureMapCount);
- fFeatureOrder = TRUE;
- fVersion2 = FALSE;
-}
-
-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;
- }
-
- if (fVersion2) {
- IndicReordering::finalReordering(glyphStorage,retCount);
- IndicReordering::applyPresentationForms(glyphStorage,retCount);
- OpenTypeLayoutEngine::glyphSubstitution(count,max, rightToLeft, glyphStorage, success);
- } else {
- IndicReordering::adjustMPres(fMPreFixups, glyphStorage, success);
- }
- 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;
- if (fVersion2) {
- outCharCount = IndicReordering::v2process(&chars[offset], count, fScriptCode, outChars, glyphStorage);
- } else {
- outCharCount = IndicReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage, &fMPreFixups, success);
- }
-
- if (LE_FAILURE(success)) {
- LE_DELETE_ARRAY(outChars);
- return 0;
- }
-
- glyphStorage.adoptGlyphCount(outCharCount);
- return outCharCount;
-}
-
-U_NAMESPACE_END