Index: icu46/source/test/letest/cmaps.cpp |
=================================================================== |
--- icu46/source/test/letest/cmaps.cpp (revision 0) |
+++ icu46/source/test/letest/cmaps.cpp (revision 0) |
@@ -0,0 +1,200 @@ |
+/*************************************************************************** |
+* |
+* Copyright (C) 1998-2003, International Business Machines |
+* Corporation and others. All Rights Reserved. |
+* |
+************************************************************************/ |
+ |
+#include "LETypes.h" |
+#include "LESwaps.h" |
+ |
+#include "sfnt.h" |
+#include "cmaps.h" |
+ |
+#define SWAPU16(code) ((LEUnicode16) SWAPW(code)) |
+#define SWAPU32(code) ((LEUnicode32) SWAPL(code)) |
+ |
+// |
+// Finds the high bit by binary searching |
+// through the bits in value. |
+// |
+le_int8 highBit(le_uint32 value) |
+{ |
+ le_uint8 bit = 0; |
+ |
+ if (value >= 1 << 16) { |
+ value >>= 16; |
+ bit += 16; |
+ } |
+ |
+ if (value >= 1 << 8) { |
+ value >>= 8; |
+ bit += 8; |
+ } |
+ |
+ if (value >= 1 << 4) { |
+ value >>= 4; |
+ bit += 4; |
+ } |
+ |
+ if (value >= 1 << 2) { |
+ value >>= 2; |
+ bit += 2; |
+ } |
+ |
+ if (value >= 1 << 1) { |
+ value >>= 1; |
+ bit += 1; |
+ } |
+ |
+ return bit; |
+} |
+ |
+CMAPMapper *CMAPMapper::createUnicodeMapper(const CMAPTable *cmap) |
+{ |
+ le_uint16 i; |
+ le_uint16 nSubtables = SWAPW(cmap->numberSubtables); |
+ const CMAPEncodingSubtable *subtable = NULL; |
+ le_uint32 offset1 = 0, offset10 = 0; |
+ |
+ for (i = 0; i < nSubtables; i += 1) { |
+ const CMAPEncodingSubtableHeader *esh = &cmap->encodingSubtableHeaders[i]; |
+ |
+ if (SWAPW(esh->platformID) == 3) { |
+ switch (SWAPW(esh->platformSpecificID)) { |
+ case 1: |
+ offset1 = SWAPL(esh->encodingOffset); |
+ break; |
+ |
+ case 10: |
+ offset10 = SWAPL(esh->encodingOffset); |
+ break; |
+ } |
+ } |
+ } |
+ |
+ |
+ if (offset10 != 0) |
+ { |
+ subtable = (const CMAPEncodingSubtable *) ((const char *) cmap + offset10); |
+ } else if (offset1 != 0) { |
+ subtable = (const CMAPEncodingSubtable *) ((const char *) cmap + offset1); |
+ } else { |
+ return NULL; |
+ } |
+ |
+ switch (SWAPW(subtable->format)) { |
+ case 4: |
+ return new CMAPFormat4Mapper(cmap, (const CMAPFormat4Encoding *) subtable); |
+ |
+ case 12: |
+ { |
+ const CMAPFormat12Encoding *encoding = (const CMAPFormat12Encoding *) subtable; |
+ |
+ return new CMAPGroupMapper(cmap, encoding->groups, SWAPL(encoding->nGroups)); |
+ } |
+ |
+ default: |
+ break; |
+ } |
+ |
+ return NULL; |
+} |
+ |
+CMAPFormat4Mapper::CMAPFormat4Mapper(const CMAPTable *cmap, const CMAPFormat4Encoding *header) |
+ : CMAPMapper(cmap) |
+{ |
+ le_uint16 segCount = SWAPW(header->segCountX2) / 2; |
+ |
+ fEntrySelector = SWAPW(header->entrySelector); |
+ fRangeShift = SWAPW(header->rangeShift) / 2; |
+ fEndCodes = &header->endCodes[0]; |
+ fStartCodes = &header->endCodes[segCount + 1]; // + 1 for reservedPad... |
+ fIdDelta = &fStartCodes[segCount]; |
+ fIdRangeOffset = &fIdDelta[segCount]; |
+} |
+ |
+LEGlyphID CMAPFormat4Mapper::unicodeToGlyph(LEUnicode32 unicode32) const |
+{ |
+ if (unicode32 >= 0x10000) { |
+ return 0; |
+ } |
+ |
+ LEUnicode16 unicode = (LEUnicode16) unicode32; |
+ le_uint16 index = 0; |
+ le_uint16 probe = 1 << fEntrySelector; |
+ TTGlyphID result = 0; |
+ |
+ if (SWAPU16(fStartCodes[fRangeShift]) <= unicode) { |
+ index = fRangeShift; |
+ } |
+ |
+ while (probe > (1 << 0)) { |
+ probe >>= 1; |
+ |
+ if (SWAPU16(fStartCodes[index + probe]) <= unicode) { |
+ index += probe; |
+ } |
+ } |
+ |
+ if (unicode >= SWAPU16(fStartCodes[index]) && unicode <= SWAPU16(fEndCodes[index])) { |
+ if (fIdRangeOffset[index] == 0) { |
+ result = (TTGlyphID) unicode; |
+ } else { |
+ le_uint16 offset = unicode - SWAPU16(fStartCodes[index]); |
+ le_uint16 rangeOffset = SWAPW(fIdRangeOffset[index]); |
+ le_uint16 *glyphIndexTable = (le_uint16 *) ((char *) &fIdRangeOffset[index] + rangeOffset); |
+ |
+ result = SWAPW(glyphIndexTable[offset]); |
+ } |
+ |
+ result += SWAPW(fIdDelta[index]); |
+ } else { |
+ result = 0; |
+ } |
+ |
+ return LE_SET_GLYPH(0, result); |
+} |
+ |
+CMAPFormat4Mapper::~CMAPFormat4Mapper() |
+{ |
+ // parent destructor does it all |
+} |
+ |
+CMAPGroupMapper::CMAPGroupMapper(const CMAPTable *cmap, const CMAPGroup *groups, le_uint32 nGroups) |
+ : CMAPMapper(cmap), fGroups(groups) |
+{ |
+ le_uint8 bit = highBit(nGroups); |
+ fPower = 1 << bit; |
+ fRangeOffset = nGroups - fPower; |
+} |
+ |
+LEGlyphID CMAPGroupMapper::unicodeToGlyph(LEUnicode32 unicode32) const |
+{ |
+ le_int32 probe = fPower; |
+ le_int32 range = 0; |
+ |
+ if (SWAPU32(fGroups[fRangeOffset].startCharCode) <= unicode32) { |
+ range = fRangeOffset; |
+ } |
+ |
+ while (probe > (1 << 0)) { |
+ probe >>= 1; |
+ |
+ if (SWAPU32(fGroups[range + probe].startCharCode) <= unicode32) { |
+ range += probe; |
+ } |
+ } |
+ |
+ if (SWAPU32(fGroups[range].startCharCode) <= unicode32 && SWAPU32(fGroups[range].endCharCode) >= unicode32) { |
+ return (LEGlyphID) (SWAPU32(fGroups[range].startGlyphCode) + unicode32 - SWAPU32(fGroups[range].startCharCode)); |
+ } |
+ |
+ return 0; |
+} |
+ |
+CMAPGroupMapper::~CMAPGroupMapper() |
+{ |
+ // parent destructor does it all |
+} |
+ |
Property changes on: icu46/source/test/letest/cmaps.cpp |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |