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0711e4def1
icu/icu.icuXXXX.malayalam.bysyllable.patch
Caolan McNamara 0711e4def1 Resolves: rhbz#220867 Malayalam rendering
2007-04-30 09:37:13 +00:00

246 lines
8.4 KiB
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diff -ruN icu.orig/source/layout/IndicReordering.h icu/source/layout/IndicReordering.h
--- icu.orig/source/layout/IndicReordering.h 2007-04-27 10:28:22.000000000 +0100
+++ icu/source/layout/IndicReordering.h 2007-04-27 10:39:22.000000000 +0100
@@ -142,6 +142,7 @@
// do not instantiate
IndicReordering();
+public:
static le_int32 findSyllable(const IndicClassTable *classTable, const LEUnicode *chars, le_int32 prev, le_int32 charCount);
};
diff -ruN icu.orig/source/layout/LayoutEngine.cpp icu/source/layout/LayoutEngine.cpp
--- icu.orig/source/layout/LayoutEngine.cpp 2007-04-27 10:28:22.000000000 +0100
+++ icu/source/layout/LayoutEngine.cpp 2007-04-27 10:39:22.000000000 +0100
@@ -14,6 +14,7 @@
#include "CanonShaping.h"
#include "HanLayoutEngine.h"
#include "HangulLayoutEngine.h"
+#include "MalayalamLayoutEngine.h"
#include "IndicLayoutEngine.h"
#include "KhmerLayoutEngine.h"
#include "ThaiLayoutEngine.h"
@@ -451,11 +452,13 @@
if (gsubTable != NULL && gsubTable->coversScript(scriptTag = OpenTypeLayoutEngine::getScriptTag(scriptCode))) {
switch (scriptCode) {
+ case mlymScriptCode:
+ result = new MalayalamOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
+ break;
case bengScriptCode:
case devaScriptCode:
case gujrScriptCode:
case kndaScriptCode:
- case mlymScriptCode:
case oryaScriptCode:
case guruScriptCode:
case tamlScriptCode:
@@ -512,11 +515,13 @@
result = new GXLayoutEngine(fontInstance, scriptCode, languageCode, morphTable);
} else {
switch (scriptCode) {
+ case mlymScriptCode:
+ result = new MalayalamOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags);
+ break;
case bengScriptCode:
case devaScriptCode:
case gujrScriptCode:
case kndaScriptCode:
- case mlymScriptCode:
case oryaScriptCode:
case guruScriptCode:
case tamlScriptCode:
diff -ruN icu.orig/source/layout/LEGlyphStorage.h icu/source/layout/LEGlyphStorage.h
--- icu.orig/source/layout/LEGlyphStorage.h 2007-04-27 10:28:22.000000000 +0100
+++ icu/source/layout/LEGlyphStorage.h 2007-04-27 10:43:54.000000000 +0100
@@ -413,6 +413,8 @@
*/
void adoptGlyphArray(LEGlyphStorage &from);
+ void appendGlyphStorage(LEGlyphStorage &from);
+
/**
* Delete the char indices array and replace it with the one
* in <code>from</code>. Set the char indices array pointer
diff -ruN icu.orig/source/layout/Makefile.in icu/source/layout/Makefile.in
--- icu.orig/source/layout/Makefile.in 2007-04-27 10:28:22.000000000 +0100
+++ icu/source/layout/Makefile.in 2007-04-27 10:39:22.000000000 +0100
@@ -66,6 +66,7 @@
ArabicLayoutEngine.o \
GXLayoutEngine.o \
HanLayoutEngine.o \
+MalayalamLayoutEngine.o \
IndicLayoutEngine.o \
LayoutEngine.o \
ContextualGlyphSubstProc.o \
diff -ruN icu.orig/source/layout/MalayalamLayoutEngine.cpp icu/source/layout/MalayalamLayoutEngine.cpp
--- icu.orig/source/layout/MalayalamLayoutEngine.cpp 1970-01-01 01:00:00.000000000 +0100
+++ icu/source/layout/MalayalamLayoutEngine.cpp 2007-04-27 10:44:26.000000000 +0100
@@ -0,0 +1,121 @@
+
+/*
+ *
+ * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
+ *
+ */
+
+#include "LETypes.h"
+#include "LayoutEngine.h"
+#include "OpenTypeLayoutEngine.h"
+#include "MalayalamLayoutEngine.h"
+#include "ScriptAndLanguageTags.h"
+
+#include "GlyphSubstitutionTables.h"
+#include "GlyphDefinitionTables.h"
+#include "GlyphPositioningTables.h"
+
+#include "GDEFMarkFilter.h"
+#include "LEGlyphStorage.h"
+
+#include "IndicReordering.h"
+
+#include <stdio.h>
+
+U_NAMESPACE_BEGIN
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(MalayalamOpenTypeLayoutEngine)
+
+void LEGlyphStorage::appendGlyphStorage(LEGlyphStorage &from)
+{
+ if (fInsertionList) applyInsertions();
+ if (from.fInsertionList) from.applyInsertions();
+
+ if (!from.fGlyphCount)
+ return;
+
+ le_int32 newGlyphCount = fGlyphCount + from.fGlyphCount;
+
+ fGlyphs = (LEGlyphID*)LE_GROW_ARRAY(fGlyphs, newGlyphCount);
+ LE_ARRAY_COPY(fGlyphs+fGlyphCount, from.fGlyphs, from.fGlyphCount);
+
+ le_int32 nLargestIndex = 0;
+ if (fGlyphCount)
+ {
+ for (le_int32 i = 0; i < fGlyphCount; ++i)
+ {
+ if (fCharIndices[i] > nLargestIndex)
+ nLargestIndex = fCharIndices[i];
+ }
+ nLargestIndex+=1;
+ }
+ fCharIndices = (le_int32 *)LE_GROW_ARRAY(fCharIndices, newGlyphCount);
+ for (le_int32 i = 0; i < from.fGlyphCount; ++i)
+ fCharIndices[fGlyphCount+i] = from.fCharIndices[i] + nLargestIndex;
+
+ fAuxData = (le_uint32 *)LE_GROW_ARRAY(fAuxData, newGlyphCount);
+ LE_ARRAY_COPY(fAuxData+fGlyphCount, from.fAuxData, from.fGlyphCount);
+
+ fGlyphCount = newGlyphCount;
+}
+
+le_int32 MalayalamOpenTypeLayoutEngine::glyphPostProcessing(LEGlyphStorage &tempGlyphStorage, LEGlyphStorage &glyphStorage, LEErrorCode &success)
+{
+ if (LE_FAILURE(success)) {
+ return 0;
+ }
+
+ glyphStorage.appendGlyphStorage(tempGlyphStorage);
+
+ return glyphStorage.getGlyphCount();
+}
+
+
+le_int32 MalayalamOpenTypeLayoutEngine::computeGlyphs(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 outGlyphCount=0;
+
+ const IndicClassTable *classTable = IndicClassTable::getScriptClassTable(fScriptCode);
+ le_int32 prev = 0;
+ while (prev < count)
+ {
+ le_int32 outCharCount=0, fakeGlyphCount=0;
+ LEUnicode *outChars = NULL;
+ LEGlyphStorage fakeGlyphStorage;
+
+ le_int32 syllable = IndicReordering::findSyllable(classTable, chars+offset, prev, count);
+ outCharCount = characterProcessing(chars+prev, offset, syllable-prev, max, rightToLeft, outChars, fakeGlyphStorage, success);
+
+ if (LE_FAILURE(success)) {
+ return 0;
+ }
+
+ if (outChars != NULL) {
+ fakeGlyphCount = glyphProcessing(outChars, 0, outCharCount, outCharCount, rightToLeft, fakeGlyphStorage, success);
+ LE_DELETE_ARRAY(outChars); // FIXME: a subclass may have allocated this, in which case this delete might not work...
+ } else {
+ fakeGlyphCount = glyphProcessing(chars+prev, offset, syllable-prev, max, rightToLeft, fakeGlyphStorage, success);
+ }
+
+ if (LE_FAILURE(success)) {
+ return 0;
+ }
+
+ outGlyphCount = glyphPostProcessing(fakeGlyphStorage, glyphStorage, success);
+
+ prev = syllable;
+ }
+
+ return outGlyphCount;
+}
+
+U_NAMESPACE_END
diff -ruN icu.orig/source/layout/MalayalamLayoutEngine.h icu/source/layout/MalayalamLayoutEngine.h
--- icu.orig/source/layout/MalayalamLayoutEngine.h 1970-01-01 01:00:00.000000000 +0100
+++ icu/source/layout/MalayalamLayoutEngine.h 2007-04-27 10:39:52.000000000 +0100
@@ -0,0 +1,41 @@
+
+/*
+ *
+ * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
+ *
+ */
+
+#ifndef __MALAYALAMLAYOUTENGINE_H
+#define __MALAYALAMLAYOUTENGINE_H
+
+#include "IndicLayoutEngine.h"
+
+U_NAMESPACE_BEGIN
+
+class MalayalamOpenTypeLayoutEngine : public IndicOpenTypeLayoutEngine
+{
+public:
+ MalayalamOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
+ le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable) :
+ IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable)
+
+ {}
+
+ MalayalamOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
+ le_int32 typoFlags) :
+ IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags)
+
+ {}
+
+ virtual UClassID getDynamicClassID() const;
+ static UClassID getStaticClassID();
+
+protected:
+ virtual le_int32 glyphPostProcessing(LEGlyphStorage &tempGlyphStorage, LEGlyphStorage &glyphStorage, LEErrorCode &success);
+
+ virtual le_int32 computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success);
+};
+
+U_NAMESPACE_END
+#endif
+
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