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-rw-r--r--Build/source/libs/icu-xetex/layout/IndicLayoutEngine.cpp114
1 files changed, 114 insertions, 0 deletions
diff --git a/Build/source/libs/icu-xetex/layout/IndicLayoutEngine.cpp b/Build/source/libs/icu-xetex/layout/IndicLayoutEngine.cpp
new file mode 100644
index 00000000000..31d5075620e
--- /dev/null
+++ b/Build/source/libs/icu-xetex/layout/IndicLayoutEngine.cpp
@@ -0,0 +1,114 @@
+
+/*
+ *
+ * (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, le_bool /*doCanonGSUB*/,
+ 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