Check in the pristine copy of ICU 4.6...

icu46/source/test/letest/FontObject.h

+/***************************************************************************
+*
+*   Copyright (C) 1998-2002, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+************************************************************************/
+
+
+#ifndef __FONTOBJECT_H
+#define __FONTOBJECT_H
+
+#include <stdio.h>
+
+#include "LETypes.h"
+
+
+#ifndef ANY_NUMBER
+#define ANY_NUMBER 1
+#endif
+
+struct DirectoryEntry
+{
+    le_uint32   tag;
+    le_uint32   checksum;
+    le_uint32   offset;
+    le_uint32   length;
+};
+
+struct SFNTDirectory
+{
+    le_uint32       scalerType;
+    le_uint16       numTables;
+    le_uint16       searchRange;
+    le_uint16       entrySelector;
+    le_uint16       rangeShift;
+    DirectoryEntry  tableDirectory[ANY_NUMBER];
+};
+
+
+struct CMAPEncodingSubtableHeader
+{
+    le_uint16   platformID;
+    le_uint16   platformSpecificID;
+    le_uint32   encodingOffset;
+};
+
+struct CMAPTable
+{
+    le_uint16   version;
+    le_uint16   numberSubtables;
+    CMAPEncodingSubtableHeader encodingSubtableHeaders[ANY_NUMBER];
+};
+
+struct CMAPEncodingSubtable
+{
+    le_uint16   format;
+    le_uint16   length;
+    le_uint16   language;
+};
+
+struct CMAPFormat0Encoding : CMAPEncodingSubtable
+{
+    le_uint8    glyphIndexArray[256];
+};
+
+struct CMAPFormat2Subheader
+{
+    le_uint16   firstCode;
+    le_uint16   entryCount;
+    le_int16    idDelta;
+    le_uint16   idRangeOffset;
+};
+
+struct CMAPFormat2Encoding : CMAPEncodingSubtable
+{
+    le_uint16  subHeadKeys[256];
+    CMAPFormat2Subheader subheaders[ANY_NUMBER];
+};
+
+struct CMAPFormat4Encoding : CMAPEncodingSubtable
+{
+    le_uint16   segCountX2;
+    le_uint16   searchRange;
+    le_uint16   entrySelector;
+    le_uint16   rangeShift;
+    le_uint16   endCodes[ANY_NUMBER];
+//  le_uint16   reservedPad;
+//  le_uint16   startCodes[ANY_NUMBER];
+//  le_uint16   idDelta[ANY_NUMBER];
+//  le_uint16   idRangeOffset[ANY_NUMBER];
+//  le_uint16   glyphIndexArray[ANY_NUMBER];
+};
+
+struct CMAPFormat6Encoding : CMAPEncodingSubtable
+{
+    le_uint16   firstCode;
+    le_uint16   entryCount;
+    le_uint16   glyphIndexArray[ANY_NUMBER];
+};
+
+typedef le_int32 fixed;
+
+struct BigDate
+{
+    le_uint32 bc;
+    le_uint32 ad;
+};
+
+struct HEADTable
+{
+    fixed       version;
+    fixed       fontRevision;
+    le_uint32   checksumAdjustment;
+    le_uint32   magicNumber;
+    le_uint16   flags;
+    le_uint16   unitsPerEm;
+    BigDate     created;
+    BigDate     modified;
+    le_int16    xMin;
+    le_int16    yMin;
+    le_int16    xMax;
+    le_int16    yMax;
+    le_int16    lowestRecPPEM;
+    le_int16    fontDirectionHint;
+    le_int16    indexToLocFormat;
+    le_int16    glyphDataFormat;
+};
+
+struct MAXPTable
+{
+    fixed       version;
+    le_uint16   numGlyphs;
+    le_uint16   maxPoints;
+    le_uint16   maxContours;
+    le_uint16   maxComponentPoints;
+    le_uint16   maxComponentContours;
+    le_uint16   maxZones;
+    le_uint16   maxTwilightPoints;
+    le_uint16   maxStorage;
+    le_uint16   maxFunctionDefs;
+    le_uint16   maxInstructionDefs;
+    le_uint16   maxStackElements;
+    le_uint16   maxSizeOfInstructions;
+    le_uint16   maxComponentElements;
+    le_uint16   maxComponentDepth;
+};
+
+struct HHEATable
+{
+    fixed       version;
+    le_int16    ascent;
+    le_int16    descent;
+    le_int16    lineGap;
+    le_uint16   advanceWidthMax;
+    le_int16    minLeftSideBearing;
+    le_int16    minRightSideBearing;
+    le_int16    xMaxExtent;
+    le_int16    caretSlopeRise;
+    le_int16    caretSlopeRun;
+    le_int16    caretOffset;
+    le_int16    reserved1;
+    le_int16    reserved2;
+    le_int16    reserved3;
+    le_int16    reserved4;
+    le_int16    metricDataFormat;
+    le_uint16   numOfLongHorMetrics;
+};
+
+struct LongHorMetric
+{
+    le_uint16   advanceWidth;
+    le_int16    leftSideBearing;
+};
+
+struct HMTXTable
+{
+    LongHorMetric hMetrics[ANY_NUMBER];        // ANY_NUMBER = numOfLongHorMetrics from hhea table
+//  le_int16      leftSideBearing[ANY_NUMBER]; // ANY_NUMBER = numGlyphs - numOfLongHorMetrics
+};
+
+class FontObject
+{
+public:
+    FontObject(char *fontName);
+    ~FontObject();
+
+    void *readTable(LETag tag, le_uint32 *length);
+    void deleteTable(void *table);
+
+    LEGlyphID unicodeToGlyph(LEUnicode32 unicode);
+
+#if 0
+    le_uint32 unicodesToGlyphs(LEUnicode *chars, le_uint32 nChars, LEGlyphID *glyphs,
+        le_uint32 *charIndices, le_bool rightToLeft);
+#endif
+
+    le_uint16 getUnitsPerEM();
+
+    le_uint16 getGlyphAdvance(LEGlyphID glyph);
+
+private:
+    FontObject();
+
+    DirectoryEntry *findTable(LETag tag);
+    CMAPEncodingSubtable *findCMAP(le_uint16 platformID, le_uint16 platformSpecificID);
+    void initUnicodeCMAP();
+
+    SFNTDirectory *directory;
+    le_uint16 numTables;
+    le_uint16 searchRange;
+    le_uint16 entrySelector;
+    le_uint16 rangeShift;
+
+    CMAPTable *cmapTable;
+    le_uint16 cmSegCount;
+    le_uint16 cmSearchRange;
+    le_uint16 cmEntrySelector;
+    le_uint16 cmRangeShift;
+    le_uint16 *cmEndCodes;
+    le_uint16 *cmStartCodes;
+    le_uint16 *cmIdDelta;
+    le_uint16 *cmIdRangeOffset;
+
+    HEADTable *headTable;
+
+    HMTXTable *hmtxTable;
+    le_uint16 numGlyphs;
+    le_uint16 numOfLongHorMetrics;
+
+    FILE *file;
+
+};
+
+#endif
+