ICU-531.30.tar.gz

[apple/icu.git] / icuSources / test / perf / leperf / cmaps.cpp

diff --git a/icuSources/test/perf/leperf/cmaps.cpp b/icuSources/test/perf/leperf/cmaps.cpp
new file mode 100644 (file)
index 0000000..7eedb00
--- /dev/null
+++ b/icuSources/test/perf/leperf/cmaps.cpp
@@ -0,0 +1,247 @@
+/***************************************************************************
+*
+*   Copyright (C) 1998-2013, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+************************************************************************/
+
+#include "layout/LETypes.h"
+#include "layout/LESwaps.h"
+
+#include "sfnt.h"
+#include "cmaps.h"
+#include <stdio.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_bool found = FALSE;
+    le_uint16 foundPlatformID = 0xFFFF;
+    le_uint16 foundPlatformSpecificID = 0xFFFF;
+    le_uint32 foundOffset = 0;
+    le_uint16 foundTable = 0xFFFF;
+    // first pass, look for MS table. (preferred?)
+    for (i = 0; i < nSubtables && !found; i += 1) {
+        const CMAPEncodingSubtableHeader *esh = &cmap->encodingSubtableHeaders[i];
+
+        le_uint16 platformID = SWAPW(esh->platformID);
+        le_uint16 platformSpecificID = SWAPW(esh->platformSpecificID);
+        if (platformID == 3) { // microsoft
+          switch (platformSpecificID) {
+            case 1: // Unicode BMP (UCS-2)
+            case 10: // Unicode UCS-4
+                foundOffset = SWAPL(esh->encodingOffset);
+                foundPlatformID = platformID;
+                foundPlatformSpecificID = platformSpecificID;
+                found = TRUE;
+                foundTable = i;
+                break;
+
+                //default:
+              //              printf("%s:%d: microsoft (3) platform specific ID %d (wanted 1 or 10) for subtable %d/%d\n", __FILE__, __LINE__, (SWAPW(esh->platformSpecificID)), i, nSubtables);
+            }
+        } else {
+          //printf("%s:%d: platform  ID %d (wanted 3, microsoft) for subtable %d/%d\n", __FILE__, __LINE__, (SWAPW(esh->platformID)), i, nSubtables);
+        }
+    }
+
+    // second pass, allow non MS table
+    // first pass, look for MS table. (preferred?)
+      for (i = 0; i < nSubtables && !found; i += 1) {
+        const CMAPEncodingSubtableHeader *esh = &cmap->encodingSubtableHeaders[i];
+        le_uint16 platformID = SWAPW(esh->platformID);
+        le_uint16 platformSpecificID = SWAPW(esh->platformSpecificID);
+        //printf("%s:%d: table %d/%d has platform:specific %d:%d\n", __FILE__, __LINE__, i, nSubtables, platformID, platformSpecificID);
+        switch(platformID) {
+        case 0: // Unicode platform
+          switch(platformSpecificID) {
+          case 0:
+          case 1:
+          case 2:
+          case 3:
+            foundOffset = SWAPL(esh->encodingOffset);
+            foundPlatformID = platformID;
+            foundPlatformSpecificID = platformSpecificID;
+            foundTable = i;
+            found = TRUE;
+            break;
+
+          default: printf("Error: table %d (psid %d) is unknown. Skipping.\n", i, platformSpecificID); break;
+          }
+          break;
+        
+          //default:
+          //printf("Skipping platform id %d\n", platformID);
+        }
+    }
+
+
+    if (found)
+    {
+      subtable = (const CMAPEncodingSubtable *) ((const char *) cmap + foundOffset);
+      //printf("%s:%d: using subtable #%d/%d type %d:%d\n", __FILE__, __LINE__, foundTable, nSubtables, foundPlatformID, foundPlatformSpecificID);
+    } else {
+      printf("%s:%d: could not find subtable.\n", __FILE__, __LINE__);
+      return NULL;
+    }
+
+    le_uint16 tableFormat = SWAPW(subtable->format);
+    //printf("%s:%d: table format %d\n", __FILE__, __LINE__, tableFormat);
+
+    switch (tableFormat) {
+    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;
+    }
+
+    printf("%s:%d: Unknown format %x.\n", __FILE__, __LINE__, (SWAPW(subtable->format)));
+    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
+}
+