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os/graphics/graphicstools/bitmapfonttools/src/FNTRECRD.CPP
author sl@SLION-WIN7.fritz.box
Fri, 15 Jun 2012 03:10:57 +0200
changeset 0 bde4ae8d615e
permissions -rw-r--r--
First public contribution. 
     1 /*

     2 * Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * Header FNTRECRD.CPP

    16 *

    17 */

    18 

    19 

    20 #include "FNTRECRD.H"

    21 

    22 const int KNumberOfPopularIndices = 128;

    23 const int KNumberOfBitsInByte = 8;

    24 const int KNumberOfBitsInTwoBytes = 16;

    25 

    26 BitmapOffset::BitmapOffset(uint16 aBitmapOffset)

    27  :	iBitmapOffset(aBitmapOffset)

    28 	{}

    29 

    30 void BitmapOffset::Externalize(ostream& out)

    31 	{

    32 	out.write((char*) &iBitmapOffset,sizeof(iBitmapOffset));

    33 	}

    34 

    35 CharacterMetrics::CharacterMetrics()

    36  :	iAscentInPixels(0),

    37 	iHeightInPixels(0),

    38 	iLeftAdjustInPixels(0),

    39 	iMoveInPixels(0),

    40 	iRightAdjustInPixels(0)

    41 	{

    42 	}

    43 

    44 

    45 void CharacterMetrics::Externalize(ostream& out)

    46 	{

    47 	out.write((char*) &iAscentInPixels, sizeof(iAscentInPixels));

    48 	out.write((char*) &iHeightInPixels, sizeof(iHeightInPixels));

    49 	out.write((char*) &iLeftAdjustInPixels, sizeof(iLeftAdjustInPixels));

    50 	out.write((char*) &iMoveInPixels, sizeof(iMoveInPixels));

    51 	out.write((char*) &iRightAdjustInPixels, sizeof(iRightAdjustInPixels));

    52 	}

    53 

    54 MetricDistributionMember::~MetricDistributionMember()

    55 	{

    56 	delete iMetric;

    57 	}

    58 

    59 MetricDistributionMember::MetricDistributionMember()

    60  :	iFrequency(0), iMetric(0)

    61 	{}

    62 

    63 CharacterMetrics* MetricDistributionMember::Metric() const

    64 	{

    65 	return iMetric;

    66 	}

    67 

    68 int MetricDistributionMember::Frequency() const

    69 	{

    70 	return iFrequency;

    71 	}

    72 

    73 void MetricDistributionMember::SetFrequency(int aFrequency)

    74 	{

    75 	iFrequency = aFrequency;

    76 	}

    77 

    78 void MetricDistributionMember::IncrementFrequency(int aIncrementBy)

    79 	{

    80 	iFrequency += aIncrementBy;

    81 	}

    82 

    83 void MetricDistributionMember::SetMetric(CharacterMetrics* aMetric)

    84 	{

    85 	iMetric = aMetric;

    86 	}

    87 

    88 void MetricDistributionMember::Externalize(ostream& out)

    89 	{

    90 	iMetric->Externalize(out);

    91 	}

    92 

    93 MetricDistribution::~MetricDistribution()

    94 	{

    95 	iCharacterMetricsList.Destroy();

    96 	}

    97 

    98 MetricDistribution* MetricDistribution::New()

    99 	{

   100 	return new MetricDistribution;

   101 	}

   102 

   103 MetricDistribution::MetricDistribution()

   104 	{}

   105 

   106 void MetricDistribution::SortMetricsByFrequency()

   107 	{	// Only need sort the most popular 128, since after this 2 bytes will always be used

   108 	int maxIndex = iCharacterMetricsList.Size();

   109 	if (maxIndex > KNumberOfPopularIndices)

   110 		{

   111 		maxIndex = KNumberOfPopularIndices;

   112 		}

   113 	for(int indexToSet = 0; indexToSet < maxIndex; indexToSet++)

   114 		{

   115 		const CharacterMetrics& mostPopularRemaining = MostPopular(indexToSet);

   116 		SetIndex(mostPopularRemaining, indexToSet);

   117 		}

   118 	}

   119 

   120 void MetricDistribution::SetIndex(const CharacterMetrics& aMetrics, int aIndexToSet)

   121 	{

   122 	int currentPos = Index(aMetrics);

   123 	if (currentPos != aIndexToSet)

   124 		{

   125 		MetricDistributionMember* match = iCharacterMetricsList[currentPos];

   126 		MetricDistributionMember* swapPos = iCharacterMetricsList[aIndexToSet];

   127 

   128 		CharacterMetrics* tempMet = match->Metric();

   129 		const int tempFreq = match->Frequency();

   130 

   131 		match->SetMetric(swapPos->Metric());

   132 		match->SetFrequency(swapPos->Frequency());

   133 		swapPos->SetMetric(tempMet);

   134 		swapPos->SetFrequency(tempFreq);

   135 		}

   136 	}

   137 

   138 void MetricDistribution::AddOrIncrementMetric(const CharacterMetrics& aMetrics, int aFrequency)

   139 	{

   140 	boolean match = false;

   141 	const CharacterMetrics* trial = NULL;

   142 	MetricDistributionMember* link = NULL;

   143 	int index;

   144 	int maxIndex = iCharacterMetricsList.Size();

   145 	

   146 	for(index = 0; index < maxIndex && !match; index++)

   147 		{

   148 		link = iCharacterMetricsList[index];

   149 		if (link)

   150 			trial = link->Metric();

   151 		if (trial && (trial->iAscentInPixels == aMetrics.iAscentInPixels)

   152 			&& (trial->iHeightInPixels == aMetrics.iHeightInPixels)

   153 			&& (trial->iLeftAdjustInPixels == aMetrics.iLeftAdjustInPixels)

   154 			&& (trial->iMoveInPixels == aMetrics.iMoveInPixels)

   155 			&& (trial->iRightAdjustInPixels == aMetrics.iRightAdjustInPixels))

   156 			{

   157 			match = true;

   158 			}

   159 		}

   160 	if (match)

   161 		{

   162 		link->IncrementFrequency(aFrequency);

   163 		}

   164 	else

   165 		{

   166 		MetricDistributionMember* newLink = new MetricDistributionMember;

   167 		newLink->IncrementFrequency(aFrequency);

   168 		CharacterMetrics* newMetric = new CharacterMetrics(aMetrics);

   169 		newLink->SetMetric(newMetric);

   170 		iCharacterMetricsList.Add(newLink);

   171 		}

   172 	}

   173 

   174 const CharacterMetrics& MetricDistribution::MostPopular(int aStartIndex)

   175 	{

   176 	// finds the most popular metric above index aStartIndex. Allows for a fairly quick sort of the metircs to be done.

   177 	MetricDistributionMember* link = NULL;

   178 	const CharacterMetrics* mostPopular = NULL;

   179 	int frequencyOfMostPopular = 0;

   180 	int frequency = 0;

   181 	int count;

   182 	int total = 0; // for debugging

   183 	const int size = iCharacterMetricsList.Size();

   184 	for (count = aStartIndex; count < size; count++)

   185 		{

   186 		link = iCharacterMetricsList[count];

   187 		frequency = link->Frequency();

   188 		if (frequency>frequencyOfMostPopular)

   189 			{

   190 			mostPopular = link->Metric();

   191 			frequencyOfMostPopular = frequency;

   192 			}

   193 		total += frequency;

   194 		}

   195 	return *mostPopular;

   196 	}

   197 

   198 int MetricDistribution::Index(const CharacterMetrics& aMetrics)

   199 	{

   200 	boolean same = false;

   201 	CharacterMetrics* match = NULL;

   202 	int i;

   203 	int size = iCharacterMetricsList.Size();

   204 	// see if we have this one already

   205 	for (i = 0; i < size; i++)

   206 		{

   207 		if (iCharacterMetricsList[i])

   208 			{

   209 			match = iCharacterMetricsList[i]->Metric();

   210 			}

   211 		if ((match->iAscentInPixels == aMetrics.iAscentInPixels)

   212 			&& (match->iHeightInPixels == aMetrics.iHeightInPixels)

   213 			&& (match->iLeftAdjustInPixels == aMetrics.iLeftAdjustInPixels)

   214 			&& (match->iMoveInPixels == aMetrics.iMoveInPixels)

   215 			&& (match->iRightAdjustInPixels == aMetrics.iRightAdjustInPixels))

   216 			{

   217 			same = true;

   218 			break;

   219 			}

   220 		}

   221 	if (!same)

   222 		{

   223 		i = -1;	// not found

   224 		}

   225 	return i;

   226 	}

   227 

   228 void MetricDistribution::Externalize(ostream& out)

   229 	{

   230 	streamoff idOffset = iStreamId;

   231 	out.write(reinterpret_cast<char*>(&idOffset), sizeof(idOffset));

   232 	int32 numMetrics = iCharacterMetricsList.Size();

   233 	out.write(reinterpret_cast<char*>(&numMetrics), sizeof(numMetrics));

   234 	}

   235 

   236 void MetricDistribution::ExternalizeComponents(ostream& out)

   237 	{

   238 	iStreamId = out.tellp();

   239 	iCharacterMetricsList.Externalize(out);

   240 	}

   241 

   242 void Characters::Externalize(ostream& out)

   243 	{

   244 	iStreamId = out.tellp();

   245 	iBitmapOffsetList.Externalize(out);

   246 	}

   247 

   248 Characters::~Characters()

   249 	{

   250 	iBitmapOffsetList.Destroy();

   251 	}

   252 

   253 ByteList::ByteList()

   254  :	iString(), iOffset(0)

   255 	{

   256 	}

   257 

   258 void ByteList::AddBit(char aBit)

   259 	{

   260 	if (iOffset > 7)

   261 		NewByte();

   262 	const char mask = 1;

   263 	aBit = char(aBit & mask);

   264 	char byte = char(aBit << iOffset);

   265 	int index = iString.Length() - 1;

   266 	iString[index] = char(iString[index] | byte);

   267 	iOffset++;

   268 	}

   269 

   270 void ByteList::NewByte()

   271 	{

   272 	char byte = 0;

   273 	iString += byte;

   274 	iOffset = 0;

   275 	}

   276 

   277 int ByteList::Length() const

   278 	{

   279 	return iString.Length();

   280 	}

   281 

   282 void ByteList::Externalize(ostream& out)

   283 	{

   284 	int32 length = iString.Length();

   285 	out.write((char*) &length, sizeof(length));

   286 	out.write(iString.Text(), length);

   287 	}

   288 

   289 void CharactersBitmap::Externalize(ostream& out)

   290 	{

   291 	iStreamId = out.tellp();

   292 	iByteList.Externalize(out);

   293 	}

   294 

   295 void CharactersBitmap::AddIndex(int aIndex)

   296 	{// Add index to metrics into the bitmap code section

   297 	 // Use 1 byte for most popular indices, 2 bytes otherwise

   298 	int power;

   299 	if (aIndex < KNumberOfPopularIndices)

   300 		{

   301 		iByteList.AddBit(0);

   302 		power = KNumberOfBitsInByte - 1;

   303 		}

   304 	else

   305 		{

   306 		iByteList.AddBit(1);

   307 		power = KNumberOfBitsInTwoBytes - 1;

   308 		}

   309 

   310 	char sigBit = 0;

   311 	// Add significant bits of index.

   312 	for(int bitToAdd = 0; bitToAdd < power; bitToAdd++)

   313 		{

   314 		sigBit = char(aIndex >> bitToAdd);

   315 		iByteList.AddBit(sigBit);

   316 		}

   317 	}

   318 

   319 void BitmapCodeSection::Externalize(ostream& out)

   320 	{

   321 	out.write((char*) &iStart, sizeof(iStart));

   322 	out.write((char*) &iEnd, sizeof(iEnd));

   323 	streamoff idOffset = iCharacters.iStreamId;

   324 	out.write(reinterpret_cast<char*>(&idOffset), sizeof(idOffset));

   325 	idOffset = iCharactersBitmap.iStreamId;

   326 	out.write(reinterpret_cast<char*>(&idOffset), sizeof(idOffset));

   327 	}

   328 	

   329 void BitmapCodeSection::ExternalizeComponents(ostream& out)

   330 	{

   331 	iCharacters.Externalize(out);

   332 	iCharactersBitmap.Externalize(out);

   333 	}

   334 	

   335 FontBitmap::FontBitmap()

   336  :	iPosture(PostureUpright),

   337 	iStrokeWeight(StrokeWeightNormal),

   338 	iIsProportional(efalse),

   339 	iCellHeightInPixels(0),

   340 	iAscentInPixels(0),

   341 	iMaxCharWidthInPixels(0),

   342 	iMaxNormalCharWidthInPixels(0),

   343 	iBitmapEncoding(0)

   344 	{

   345 	iCharacterMetrics = MetricDistribution::New();

   346 	}

   347 

   348 void FontBitmap::Externalize(ostream& out)

   349 	{

   350 	iStreamId = out.tellp();

   351 	out.write((char*) &iUid, sizeof(iUid));

   352 	out.put((char) iPosture);

   353 	out.put((char) iStrokeWeight);

   354 	out.put((char) iIsProportional);

   355 	out.write((char*) &iCellHeightInPixels, sizeof(iCellHeightInPixels));

   356 	out.write((char*) &iAscentInPixels, sizeof(iAscentInPixels));

   357 	out.write((char*) &iMaxCharWidthInPixels, sizeof(iMaxCharWidthInPixels));

   358 	out.write((char*) &iMaxNormalCharWidthInPixels, sizeof(iMaxNormalCharWidthInPixels));

   359 	out.write((char*) &iBitmapEncoding, sizeof(iBitmapEncoding));

   360 	iCharacterMetrics->Externalize(out);

   361 	iCodeSectionList.Externalize(out);

   362 	}

   363 

   364 void FontBitmap::ExternalizeComponents(ostream& out)

   365 	{

   366 	// write out characters and chactersbitmap records

   367 	iCharacterMetrics->ExternalizeComponents(out);

   368 	int size = iCodeSectionList.Size();

   369 	for (int i = 0; i < size; i++)

   370 		{

   371 		iCodeSectionList[i]->ExternalizeComponents(out);

   372 		}

   373 	}

   374 

   375 FontBitmap::~FontBitmap()

   376 	{

   377 	iCodeSectionList.Destroy();

   378 	delete iCharacterMetrics;

   379 	}

   380 

   381 TypefaceFontBitmap::TypefaceFontBitmap(FontBitmap* aFontBitmap)

   382  :	iFontBitmap(aFontBitmap),

   383 	iFontBitmapUid(KNullUid),

   384 	iWidthFactor(1),

   385 	iHeightFactor(1)

   386 	{

   387 	}

   388 

   389 TypefaceFontBitmap::TypefaceFontBitmap(uid aFontBitmapUid)

   390  :	iFontBitmap(NULL),

   391 	iFontBitmapUid(aFontBitmapUid),

   392 	iWidthFactor(1),

   393 	iHeightFactor(1)

   394 	{

   395 	}

   396 

   397 void TypefaceFontBitmap::Externalize(ostream& out)

   398 	{

   399 	if (iFontBitmap)

   400 		out.write((char*) &iFontBitmap->iUid, sizeof(iFontBitmap->iUid));

   401 	else

   402 		out.write((char*) &iFontBitmapUid, sizeof(iFontBitmapUid));

   403 	out.write((char*) &iWidthFactor, sizeof(iWidthFactor));

   404 	out.write((char*) &iHeightFactor, sizeof(iHeightFactor));

   405 	}

   406 

   407 void FntTypeface::Externalize(ostream& out)

   408 	{

   409 	iStreamId = out.tellp();

   410 	Typeface::Externalize(out);

   411 	iTypefaceFontBitmapList.Externalize(out);

   412 	}

   413 

   414 FontStoreFile::FontStoreFile()

   415  :	iCollectionUid(KNullUid),

   416 	iKPixelAspectRatio(1000),

   417 	iCopyrightInfo(),

   418 	iDataStreamId(0)

   419 	{

   420 	}

   421 

   422 void FontStoreFile::AddTypeface(FntTypeface *aTypeface)

   423 	{

   424 	iTypefaceList.Add(aTypeface);

   425 	for (int i = 0; i < aTypeface->iTypefaceFontBitmapList.Size(); i++)

   426 		{

   427 		if (aTypeface->iTypefaceFontBitmapList[i]->iFontBitmap)

   428 			iFontBitmapList.Add(aTypeface->iTypefaceFontBitmapList[i]->iFontBitmap);

   429 		}

   430 	}

   431 

   432 void FontStoreFile::AddFontBitmap(FontBitmap* aFontBitmap)

   433 	{

   434 	iFontBitmapList.Add(aFontBitmap);

   435 	}

   436 

   437 void FontStoreFile::Externalize(ostream& out)

   438 	{

   439 	ExternalizeHeader(out);

   440 	ExternalizeComponents(out);

   441 	}

   442 

   443 void FontStoreFile::ExternalizeHeader(ostream& out)

   444 	{

   445 	out.write((char*) &KStoreWriteOnceLayoutUid, sizeof(KStoreWriteOnceLayoutUid));

   446 	out.write((char*) &KFontStoreFileUid, sizeof(KFontStoreFileUid));

   447 	out.write((char*) &KNullUid, sizeof(KNullUid));

   448 	out.write((char*) &KFontStoreFileChecksum, sizeof(KFontStoreFileChecksum));

   449 	streamoff idOffset = iStreamId;

   450 	out.write(reinterpret_cast<char*>(&idOffset), sizeof(idOffset));

   451 	iStreamId = out.tellp();

   452 	out.write((char*) &KFnttranVersion, sizeof(KFnttranVersion));

   453 	out.write((char*) &iCollectionUid, sizeof(iCollectionUid));

   454 	out.write((char*) &iKPixelAspectRatio, sizeof(iKPixelAspectRatio));

   455 	idOffset = iDataStreamId;

   456 	out.write(reinterpret_cast<char*>(&idOffset), sizeof(idOffset));

   457 	iCopyrightInfo.Externalize(out);

   458 	}

   459 

   460 void FontStoreFile::ExternalizeComponents(ostream& out)

   461 	{

   462 	iDataStreamId = out.tellp();

   463 	iFontBitmapList.Externalize(out);

   464 	iTypefaceList.Externalize(out);

   465 	iFontBitmapList.ExternalizeComponents(out);

   466 	}

   467 

   468 boolean FontStore::Store(const String& aFilename)

   469 	{

   470 	boolean state = efalse;

   471 	ofstream fout;

   472 	String string = aFilename;

   473 	fout.open(string.Text(), ios::binary);

   474 	if (!fout.fail())

   475 		{

   476 		iFontStoreFile->Externalize(fout);

   477 		fout.close();

   478 		fout.open(string.Text(), ios::binary | ios::trunc);

   479 		iFontStoreFile->Externalize(fout);

   480 		fout.close();

   481 		state = etrue;

   482 		}

   483 	return state;

   484 	}

   485 

   486 void FontStore::AddFontStoreFile(FontStoreFile* aFontStoreFile)

   487 	{

   488 	iFontStoreFile = aFontStoreFile;

   489 	}

   490 

   491 void FontStore::AddFontBitmap(FontBitmap *aFontBitmap)

   492 	{

   493 	iFontBitmapList.Add(aFontBitmap);

   494 	}

   495 

   496 Record* FontStore::FindFontBitmap(String& aLabel)

   497 	{

   498 	return iFontBitmapList.LabelToRecord(aLabel);

   499 	}

   500 

   501 void FontStore::AddTypeface(FntTypeface *aTypeface)

   502 	{

   503 	iTypefaceList.Add(aTypeface);

   504 	}

   505 

   506 Record* FontStore::FindTypeface(String& aLabel)

   507 	{

   508 	return iTypefaceList.LabelToRecord(aLabel);

   509 	}

   510 

   511 FontStore::FontStore()

   512  :	iFontStoreFile(NULL),

   513 	iFontBitmapList(),

   514 	iTypefaceList()

   515 	{

   516 	}

   517 

   518 FontStore::~FontStore()

   519 	{

   520 	delete iFontStoreFile;

   521 	iFontBitmapList.Destroy();

   522 	iTypefaceList.Destroy();

   523 	}
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