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-rw-r--r--Build/source/libs/icu/icu-4.6/layout/ArabicLayoutEngine.cpp217
1 files changed, 217 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-4.6/layout/ArabicLayoutEngine.cpp b/Build/source/libs/icu/icu-4.6/layout/ArabicLayoutEngine.cpp
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+++ b/Build/source/libs/icu/icu-4.6/layout/ArabicLayoutEngine.cpp
@@ -0,0 +1,217 @@
+
+/*
+ *
+ * (C) Copyright IBM Corp. 1998-2008 - All Rights Reserved
+ *
+ */
+
+#include "LETypes.h"
+#include "LEScripts.h"
+#include "LEGlyphFilter.h"
+#include "LEGlyphStorage.h"
+#include "LayoutEngine.h"
+#include "OpenTypeLayoutEngine.h"
+#include "ArabicLayoutEngine.h"
+#include "ScriptAndLanguageTags.h"
+#include "CharSubstitutionFilter.h"
+
+#include "GlyphSubstitutionTables.h"
+#include "GlyphDefinitionTables.h"
+#include "GlyphPositioningTables.h"
+
+#include "GDEFMarkFilter.h"
+
+#include "ArabicShaping.h"
+#include "CanonShaping.h"
+
+U_NAMESPACE_BEGIN
+
+le_bool CharSubstitutionFilter::accept(LEGlyphID glyph) const
+{
+ return fFontInstance->canDisplay((LEUnicode) glyph);
+}
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ArabicOpenTypeLayoutEngine)
+
+ArabicOpenTypeLayoutEngine::ArabicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
+ le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable, LEErrorCode &success)
+ : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success)
+{
+ fFeatureMap = ArabicShaping::getFeatureMap(fFeatureMapCount);
+ fFeatureOrder = TRUE;
+}
+
+ArabicOpenTypeLayoutEngine::ArabicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
+ le_int32 typoFlags, LEErrorCode &success)
+ : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success)
+{
+ fFeatureMap = ArabicShaping::getFeatureMap(fFeatureMapCount);
+
+ // NOTE: We don't need to set fFeatureOrder to TRUE here
+ // because this constructor is only called by the constructor
+ // for UnicodeArabicOpenTypeLayoutEngine, which uses a pre-built
+ // GSUB table that has the features in the correct order.
+
+ //fFeatureOrder = TRUE;
+}
+
+ArabicOpenTypeLayoutEngine::~ArabicOpenTypeLayoutEngine()
+{
+ // nothing to do
+}
+
+// Input: characters
+// Output: characters, char indices, tags
+// Returns: output character count
+le_int32 ArabicOpenTypeLayoutEngine::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;
+ }
+
+ outChars = LE_NEW_ARRAY(LEUnicode, count);
+
+ if (outChars == NULL) {
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ glyphStorage.allocateGlyphArray(count, rightToLeft, success);
+ glyphStorage.allocateAuxData(success);
+
+ if (LE_FAILURE(success)) {
+ LE_DELETE_ARRAY(outChars);
+ return 0;
+ }
+
+ CanonShaping::reorderMarks(&chars[offset], count, rightToLeft, outChars, glyphStorage);
+
+ // Note: This processes the *original* character array so we can get context
+ // for the first and last characters. This is OK because only the marks
+ // will have been reordered, and they don't contribute to shaping.
+ ArabicShaping::shape(chars, offset, count, max, rightToLeft, glyphStorage);
+
+ return count;
+}
+
+void ArabicOpenTypeLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
+ LEGlyphStorage &glyphStorage, LEErrorCode &success)
+{
+ if (LE_FAILURE(success)) {
+ return;
+ }
+
+ if (chars == NULL || offset < 0 || count < 0) {
+ success = LE_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
+
+ if (fGPOSTable != NULL) {
+ OpenTypeLayoutEngine::adjustGlyphPositions(chars, offset, count, reverse, glyphStorage, success);
+ } else if (fGDEFTable != NULL) {
+ GDEFMarkFilter filter(fGDEFTable);
+
+ adjustMarkGlyphs(glyphStorage, &filter, success);
+ } else {
+ GlyphDefinitionTableHeader *gdefTable = (GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable;
+ GDEFMarkFilter filter(gdefTable);
+
+ adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success);
+ }
+}
+
+UnicodeArabicOpenTypeLayoutEngine::UnicodeArabicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success)
+ : ArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success)
+{
+ fGSUBTable = (const GlyphSubstitutionTableHeader *) CanonShaping::glyphSubstitutionTable;
+ fGDEFTable = (const GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable;
+
+ fSubstitutionFilter = new CharSubstitutionFilter(fontInstance);
+}
+
+UnicodeArabicOpenTypeLayoutEngine::~UnicodeArabicOpenTypeLayoutEngine()
+{
+ delete fSubstitutionFilter;
+}
+
+// "glyphs", "indices" -> glyphs, indices
+le_int32 UnicodeArabicOpenTypeLayoutEngine::glyphPostProcessing(LEGlyphStorage &tempGlyphStorage, LEGlyphStorage &glyphStorage, LEErrorCode &success)
+{
+ if (LE_FAILURE(success)) {
+ return 0;
+ }
+
+ // FIXME: we could avoid the memory allocation and copy if we
+ // made a clone of mapCharsToGlyphs which took the fake glyphs
+ // directly.
+ le_int32 tempGlyphCount = tempGlyphStorage.getGlyphCount();
+ LEUnicode *tempChars = LE_NEW_ARRAY(LEUnicode, tempGlyphCount);
+
+ if (tempChars == NULL) {
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ for (le_int32 i = 0; i < tempGlyphCount; i += 1) {
+ tempChars[i] = (LEUnicode) LE_GET_GLYPH(tempGlyphStorage[i]);
+ }
+
+ glyphStorage.adoptCharIndicesArray(tempGlyphStorage);
+
+ ArabicOpenTypeLayoutEngine::mapCharsToGlyphs(tempChars, 0, tempGlyphCount, FALSE, TRUE, glyphStorage, success);
+
+ LE_DELETE_ARRAY(tempChars);
+
+ return tempGlyphCount;
+}
+
+void UnicodeArabicOpenTypeLayoutEngine::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, le_bool /*mirror*/, LEGlyphStorage &glyphStorage, LEErrorCode &success)
+{
+ if (LE_FAILURE(success)) {
+ return;
+ }
+
+ if (chars == NULL || offset < 0 || count < 0) {
+ success = LE_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
+
+ le_int32 i, dir = 1, out = 0;
+
+ if (reverse) {
+ out = count - 1;
+ dir = -1;
+ }
+
+ glyphStorage.allocateGlyphArray(count, reverse, success);
+
+ for (i = 0; i < count; i += 1, out += dir) {
+ glyphStorage[out] = (LEGlyphID) chars[offset + i];
+ }
+}
+
+void UnicodeArabicOpenTypeLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
+ LEGlyphStorage &glyphStorage, LEErrorCode &success)
+{
+ if (LE_FAILURE(success)) {
+ return;
+ }
+
+ if (chars == NULL || offset < 0 || count < 0) {
+ success = LE_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
+
+ GDEFMarkFilter filter(fGDEFTable);
+
+ adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success);
+}
+
+U_NAMESPACE_END
+