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os/graphics/graphicstools/gdi_tools/bmconv/BMTOPBM.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 // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #include "BMCONV.H"

    17 

    18 BitmapLoader::BitmapLoader():

    19 	iNumBmpColors(0),

    20 	iBmpColors(NULL),

    21 	iBmpBits(NULL),

    22 	iAlphaBits(NULL)

    23 	{}

    24 

    25 BitmapLoader::~BitmapLoader()

    26 	{

    27 	delete [] iBmpColors;

    28 	delete [] iBmpBits;

    29 	delete [] iAlphaBits;

    30 	}

    31 

    32 int BitmapLoader::LoadBitmap(char* aFileName,int aBpp,TBitmapColor aColor,SEpocBitmapHeader*& aPbm)

    33 	{

    34 	char sig[2];

    35 

    36 #if defined(__MSVCDOTNET__) || defined(__LINUX__) || defined(__TOOLS2__)

    37 	fstream file(aFileName, ios::in | ios::binary);

    38 #else //!__MSVCDOTNET__

    39 	fstream file(aFileName, ios::in | ios::binary | ios::nocreate);

    40 #endif //__MSVCDOTNET__

    41 

    42 	if (file.is_open()==0)

    43 		return Files;

    44 	file.read(sig,2);

    45 	file.close();

    46 	if (file.gcount()!=2)

    47 		return SourceFile ;

    48 	if (sig[0]!='B'||sig[1]!='M')

    49 		return SourceFile;

    50 

    51 	int ret = DoLoad(aFileName);

    52 	if (!ret && aColor==EColorBitmapAlpha)

    53 		{

    54 		int fileNameLen = strlen(aFileName);

    55 		char* alphaFileName = new char[fileNameLen + 7];// -alpha suffix is 6 chars, plus NUL termination

    56 		if (alphaFileName == NULL)

    57 			return NoMemory;

    58 		int dotPos = -1;

    59 		for (int i = 0; i < fileNameLen; ++i)

    60 			if (aFileName[i]=='.')

    61 				dotPos=i;

    62 		int prefixLen = (dotPos>=0?dotPos:fileNameLen);

    63 		memcpy(alphaFileName,aFileName,prefixLen);

    64 		const char* suffix = "-alpha";

    65 		memcpy(alphaFileName+prefixLen,suffix,6);

    66 		if (dotPos>=0)

    67 			memcpy(alphaFileName+prefixLen+6,aFileName+dotPos,fileNameLen-dotPos);

    68 		*(alphaFileName + fileNameLen + 6) = '\0';

    69 		ret = DoLoadAlpha(alphaFileName); // overlay alpha data from separate file

    70 		delete [] alphaFileName;

    71 		}

    72 	if (!ret)

    73 		ret = DoConvert(aBpp,aColor,aPbm);

    74 	return ret;

    75 	}

    76 

    77 int BitmapLoader::DoLoad(char* aFileName)

    78 	{

    79 #if defined(__MSVCDOTNET__) || defined(__TOOLS2__)

    80 	fstream file(aFileName, ios::in | ios::binary);

    81 #else //!__MSVCDOTNET__

    82 	fstream file(aFileName, ios::in | ios::binary | ios::nocreate);

    83 #endif //__MSVCDOTNET__

    84 	if (file.is_open()==0)

    85 		return Files;

    86 	TBitmapFileHeader bmpfile;

    87 	long size=sizeof(TBitmapFileHeader);

    88 	file.read((char *)&bmpfile,size);

    89 	if (file.gcount()!=size)

    90 		return SourceFile;

    91 	size=sizeof(TBitmapInfoHeader);

    92 	file.read((char *)&iBmpHeader,size);

    93 	if (file.gcount()!=size)

    94 		return SourceFile;

    95 	if (iBmpHeader.biCompression != 0)

    96 		return UnknownCompression;

    97 	size=bmpfile.bfSize-sizeof(TBitmapInfoHeader)-sizeof(TBitmapFileHeader);

    98 	long bitcount=iBmpHeader.biBitCount;

    99 	long colors=iBmpHeader.biClrUsed;

   100 	if (colors==0)

   101 		{

   102 		if (bitcount==24)

   103 			iNumBmpColors=0;

   104 		else if (bitcount==32)

   105 			iNumBmpColors=0;//See MSDN - BITMAPFILEHEADER and BITMAPINFOHEADER structures.

   106                             //If biCompression is 0 - we don't have TRgbQuad array! 

   107 		else

   108 			iNumBmpColors=1<<bitcount;

   109 		}

   110 	else

   111 		iNumBmpColors=colors;

   112 	if (iNumBmpColors > 256)

   113 		return SourceFile;

   114 	if (iNumBmpColors>0)

   115 		{

   116 		iBmpColors = new TRgbQuad[iNumBmpColors];

   117 		if (iBmpColors == NULL)

   118 			return NoMemory;

   119 		memset(iBmpColors,0,iNumBmpColors*sizeof(TRgbQuad));

   120 		}

   121 	size-=iNumBmpColors*sizeof(TRgbQuad);

   122 	iBmpBits = new char[size];

   123 	if (iBmpBits == NULL)

   124 		return NoMemory;

   125 	memset(iBmpBits,0xff,size);

   126 	// DEF102183: Graphics tools fail to run after building with MS VC8.

   127 	if(iBmpColors != NULL)

   128 	    {

   129 		file.read((char *)iBmpColors,iNumBmpColors*sizeof(TRgbQuad));

   130 		if (file.gcount()!=(int)(iNumBmpColors*sizeof(TRgbQuad)))

   131 			return SourceFile;

   132 	    }

   133 	file.read(iBmpBits,size);

   134 	file.close();

   135 	if (file.gcount()!=size)

   136 		return SourceFile;

   137 	return NoError;

   138 	}

   139 

   140 int BitmapLoader::DoLoadAlpha(char* aAlphaFileName)

   141 	{

   142 #if defined(__MSVCDOTNET__) || defined(__TOOLS2__)

   143 	fstream file(aAlphaFileName, ios::in | ios::binary);

   144 #else //!__MSVCDOTNET__

   145 	fstream file(aAlphaFileName, ios::in | ios::binary | ios::nocreate);

   146 #endif //__MSVCDOTNET__

   147 	if (file.is_open()==0)

   148 		return AlphaFiles;

   149 	TBitmapFileHeader alphaBmpfile;

   150 	long size=sizeof(TBitmapFileHeader);

   151 	file.read((char *)&alphaBmpfile,size);

   152 	if (file.gcount()!=size)

   153 		return SourceFile;

   154 	size=sizeof(TBitmapInfoHeader);

   155 	TBitmapInfoHeader alphaBmpInfo;

   156 	file.read((char *)&alphaBmpInfo,size);

   157 	if (file.gcount()!=size)

   158 		return SourceFile;

   159 	if (alphaBmpInfo.biCompression != 0)

   160 		return UnknownCompression;

   161 	if (alphaBmpInfo.biWidth != iBmpHeader.biWidth || alphaBmpInfo.biHeight != iBmpHeader.biHeight)

   162 		return AlphaDimensions;

   163 	if (alphaBmpInfo.biBitCount != 8)

   164 		return AlphaBpp;

   165 	size=alphaBmpfile.bfSize-sizeof(TBitmapInfoHeader)-sizeof(TBitmapFileHeader);

   166 	long numBmpColors=alphaBmpInfo.biClrUsed;

   167 	if (numBmpColors == 0)

   168 		numBmpColors = 256;

   169 	if (numBmpColors != 256)

   170 		return SourceFile;

   171 	size-=numBmpColors*sizeof(TRgbQuad);

   172 	iAlphaBits = new char[size];

   173 	if (iAlphaBits == NULL)

   174 		{

   175 		return NoMemory;

   176 		}

   177 	memset(iAlphaBits,0xff,size);

   178 	char* bmpColors = new char[numBmpColors*sizeof(TRgbQuad)];

   179 	file.read((char *)bmpColors,numBmpColors*sizeof(TRgbQuad));

   180 	delete [] bmpColors; // we aren't interested in the palette data for the 8bpp grayscale alpha bmp

   181 	if (file.gcount()!=(int)(numBmpColors*sizeof(TRgbQuad)))

   182 		return SourceFile;

   183 	file.read(iAlphaBits,size);

   184 	file.close();

   185 	if (file.gcount()!=size)

   186 		return SourceFile;

   187 	return NoError;

   188 	}

   189 

   190 TRgb BitmapLoader::GetBmpPixel(long aXCoord,long aYCoord)

   191 	{

   192 	TRgb darkgray(128,128,128);

   193 	TRgb darkgrayex(127,127,127);

   194 	TRgb lightgray(192,192,192);

   195 	TRgb lightgrayex(187,187,187);

   196 	unsigned char col;

   197 	TRgb color;

   198 

   199 	switch(iBmpHeader.biBitCount)

   200 		{

   201 		case 1:

   202 			col=iBmpBits[(iBmpHeader.biHeight-aYCoord-1)*(((iBmpHeader.biWidth+31)>>5)<<2)+(aXCoord>>3)];

   203 			col&=(0x80>>(aXCoord%8));

   204 			if (iBmpColors)

   205 				{

   206 				TRgbQuad rgbq;

   207 				if (col)

   208 					rgbq = iBmpColors[1];

   209 				else

   210 					rgbq = iBmpColors[0];

   211 				color = TRgb(rgbq.iRed,rgbq.iGreen,rgbq.iBlue);

   212 				}

   213 			else

   214 				{

   215 				if (col)

   216 					color = TRgb(0x00ffffff);

   217 				else

   218 					color = TRgb(0);

   219 				}

   220 			break;

   221 		case 4:

   222 			col=iBmpBits[(iBmpHeader.biHeight-aYCoord-1)*(((iBmpHeader.biWidth+7)>>3)<<2)+(aXCoord>>1)];

   223 			if (aXCoord%2==0)

   224 				col=(unsigned char)(col>>4);

   225 			col&=0x0f;

   226 			if (iBmpColors)

   227 				{

   228 				TRgbQuad rgbq = iBmpColors[col];

   229 				color = TRgb(rgbq.iRed,rgbq.iGreen,rgbq.iBlue);

   230 				}

   231 			else

   232 				{

   233 				col *= 17;

   234 				color = TRgb(col,col,col);

   235 				}

   236 			break;

   237 		case 8:

   238 			col=iBmpBits[(iBmpHeader.biHeight-aYCoord-1)*((iBmpHeader.biWidth+3)&~3)+aXCoord];

   239 			if (iBmpColors)

   240 				{

   241 				TRgbQuad rgbq = iBmpColors[col];

   242 				color = TRgb(rgbq.iRed,rgbq.iGreen,rgbq.iBlue);

   243 				}

   244 			else

   245 				color = TRgb(col,col,col);

   246 			break;

   247 		case 16:

   248 			{

   249 			unsigned short int* wordptr = (unsigned short int*)&iBmpBits[(iBmpHeader.biHeight-aYCoord-1)*(((iBmpHeader.biWidth+1)&~1)<<1)+(aXCoord<<1)];

   250 			color = TRgb((*wordptr&0x7c)>>10,(*wordptr&0x3e)>>5,(*wordptr&0x1f));

   251 			}

   252 			break;

   253 		case 24:

   254 			{

   255 			TRgbTriple rgbcol = *((TRgbTriple *)&(iBmpBits[(iBmpHeader.biHeight-aYCoord-1)*((3*iBmpHeader.biWidth+3)&~3)+aXCoord+(aXCoord<<1)]));

   256 			color = TRgb(rgbcol.rgbtRed,rgbcol.rgbtGreen,rgbcol.rgbtBlue);

   257 			}

   258 			break;

   259 		case 32:

   260 			{

   261 			unsigned long int* dwordptr = (unsigned long int*)&iBmpBits[(iBmpHeader.biHeight-aYCoord-1)*((iBmpHeader.biWidth)<<2)+(aXCoord<<2)];

   262 			color = TRgb((*dwordptr&0xff0000)>>16,(*dwordptr&0xff00)>>8,*dwordptr&0xff);

   263 			}

   264 			break;

   265 		default:

   266 			break;

   267 		}

   268 	if (color == darkgray)

   269 		color = darkgrayex;

   270 	else if (color == lightgray)

   271 		color = lightgrayex;

   272 	return color;

   273 	}

   274 

   275 unsigned char BitmapLoader::GetAlphaPixel(long aXCoord,long aYCoord)

   276 	{

   277 	return iAlphaBits[(iBmpHeader.biHeight-aYCoord-1)*((iBmpHeader.biWidth+3)&~3)+aXCoord];

   278 	}

   279 

   280 int BitmapLoader::DoConvert(int aBpp,TBitmapColor aColor,SEpocBitmapHeader*& aPbm)

   281 	{

   282 	bool useAlpha = (aColor==EColorBitmapAlpha || aColor==EColorBitmapAlphaPM);

   283 	long desttwipswidth = 0;

   284 	long desttwipsheight = 0;

   285 

   286 	long bytewidth = BitmapUtils::ByteWidth(iBmpHeader.biWidth,aBpp);

   287 	long destlength = iBmpHeader.biHeight * bytewidth;

   288 

   289 	if (iBmpHeader.biXPelsPerMeter>0)

   290 		desttwipswidth = iBmpHeader.biWidth*1440000/254/iBmpHeader.biXPelsPerMeter;

   291 	if (iBmpHeader.biYPelsPerMeter>0)

   292 		desttwipsheight = iBmpHeader.biHeight*1440000/254/iBmpHeader.biYPelsPerMeter;

   293 

   294 	aPbm = (SEpocBitmapHeader*)new char[sizeof(SEpocBitmapHeader) + destlength];

   295 	if (aPbm == NULL)

   296 		return NoMemory;

   297 	memset(aPbm,0,sizeof(SEpocBitmapHeader));

   298 

   299 	// aBitmap->iByteWidth = bytewidth;

   300 	// aBitmap->iDataOffset = sizeof(Bitmap);

   301 

   302 	aPbm->iBitmapSize = sizeof(SEpocBitmapHeader) + destlength;

   303 	aPbm->iStructSize = sizeof(SEpocBitmapHeader);

   304 	aPbm->iWidthInPixels = iBmpHeader.biWidth;

   305 	aPbm->iHeightInPixels = iBmpHeader.biHeight;

   306 	aPbm->iWidthInTwips = desttwipswidth;

   307 	aPbm->iHeightInTwips = desttwipsheight;

   308 	aPbm->iBitsPerPixel = aBpp;

   309 	aPbm->iColor = aColor;

   310 	aPbm->iPaletteEntries = 0;

   311 	aPbm->iCompression = ENoBitmapCompression;

   312 

   313 	char* pbmBits = ((char*)aPbm) + sizeof(SEpocBitmapHeader);

   314 	memset(pbmBits,0xff,destlength);

   315 

   316 	long col = 0;

   317 	char* pixadd = 0;

   318 

   319 	switch(aBpp)

   320 		{

   321 	case 1:

   322 		{

   323 		for(long ycrd=0;ycrd<iBmpHeader.biHeight;ycrd++)

   324 			for(long xcrd=0;xcrd<iBmpHeader.biWidth;xcrd++)

   325 				{

   326 				TRgb color=GetBmpPixel(xcrd,ycrd);

   327 				col=color.Gray2();

   328 				pixadd=&(pbmBits[ycrd*bytewidth+(xcrd>>3)]);

   329 				(*pixadd)&=~(1<<((xcrd&7)));

   330 				(*pixadd)|=(unsigned char)(col<<(xcrd&7));

   331 				}

   332 		}

   333 		break;

   334 	case 2:

   335 		{

   336 		for(long ycrd=0;ycrd<iBmpHeader.biHeight;ycrd++)

   337 			for(long xcrd=0;xcrd<iBmpHeader.biWidth;xcrd++)

   338 				{

   339 				TRgb color=GetBmpPixel(xcrd,ycrd);

   340 				col=color.Gray4();

   341 				pixadd=&(pbmBits[ycrd*bytewidth+(xcrd>>2)]);

   342 				(*pixadd)&=~(0x3<<(2*(xcrd%4)));

   343 				(*pixadd)|=(unsigned char)(col<<(2*(xcrd%4)));

   344 				}

   345 		}

   346 		break;

   347 	case 4:

   348 		{

   349 		for(long ycrd=0;ycrd<iBmpHeader.biHeight;ycrd++)

   350 			for(long xcrd=0;xcrd<iBmpHeader.biWidth;xcrd++)

   351 				{

   352 				TRgb color=GetBmpPixel(xcrd,ycrd);

   353 				if (aColor == EMonochromeBitmap)

   354 					col = color.Gray16();

   355 				else

   356 					col = color.Color16();

   357 				pixadd=&(pbmBits[ycrd*bytewidth+(xcrd>>1)]);

   358 				if (xcrd%2!=0)

   359 					*pixadd=(unsigned char)((unsigned char)((col<<4)|(*pixadd&0x0f)));

   360 				else

   361 					*pixadd=(unsigned char)((unsigned char)(col|(*pixadd&0xf0)));

   362 				}

   363 		}

   364 		break;

   365 	case 8:

   366 		{

   367 		for(long ycrd=0;ycrd<iBmpHeader.biHeight;ycrd++)

   368 			for(long xcrd=0;xcrd<iBmpHeader.biWidth;xcrd++)

   369 				{

   370 				TRgb color=GetBmpPixel(xcrd,ycrd);

   371 				if (aColor == EMonochromeBitmap)

   372 					col = color.Gray256();

   373 				else

   374 					col = color.Color256();

   375 				pixadd=&(pbmBits[ycrd*((iBmpHeader.biWidth+3)&~3)+xcrd]);

   376 				*pixadd=(unsigned char)col;

   377 				}

   378 		}

   379 		break;

   380 	case 12:

   381 		{

   382 		for(long ycrd=0;ycrd<iBmpHeader.biHeight;ycrd++)

   383 			for(long xcrd=0;xcrd<iBmpHeader.biWidth;xcrd++)

   384 				{

   385 				TRgb color=GetBmpPixel(xcrd,ycrd);

   386 				col=color.Color4K();

   387 				pixadd=&(pbmBits[ycrd*bytewidth+(xcrd<<1)]);

   388 				unsigned short* wordadd=(unsigned short*)pixadd;

   389 				*wordadd=(unsigned short)col;

   390 				}

   391 		}

   392 		break;

   393 	case 16:

   394 		{

   395 		for(long ycrd=0;ycrd<iBmpHeader.biHeight;ycrd++)

   396 			for(long xcrd=0;xcrd<iBmpHeader.biWidth;xcrd++)

   397 				{

   398 				TRgb color=GetBmpPixel(xcrd,ycrd);

   399 				col=color.Color64K();

   400 				pixadd=&(pbmBits[ycrd*bytewidth+(xcrd<<1)]);

   401 				unsigned short* wordadd=(unsigned short*)pixadd;

   402 				*wordadd=(unsigned short)col;

   403 				}

   404 		}

   405 		break;

   406 	case 24:

   407 		{

   408 		for(long ycrd=0;ycrd<iBmpHeader.biHeight;ycrd++)

   409 			{

   410 			unsigned char* bytePtr = (unsigned char*)&pbmBits[ycrd*bytewidth];

   411 			for(long xcrd=0;xcrd<iBmpHeader.biWidth;xcrd++)

   412 				{

   413 				TRgb col = GetBmpPixel(xcrd,ycrd);

   414 				*bytePtr++ = (unsigned char) col.iBlue;

   415 				*bytePtr++ = (unsigned char) col.iGreen;

   416 				*bytePtr++ = (unsigned char) col.iRed;

   417 				}

   418 			}

   419 		}

   420 		break;

   421 	case 32:

   422 		{

   423 		for(long ycrd=0;ycrd<iBmpHeader.biHeight;ycrd++)

   424 			{

   425 			unsigned char* bytePtr = (unsigned char*)&pbmBits[ycrd*bytewidth];

   426 			for(long xcrd=0;xcrd<iBmpHeader.biWidth;xcrd++)

   427 				{

   428 				TRgb col = GetBmpPixel(xcrd,ycrd);

   429 				unsigned char alpha = useAlpha?GetAlphaPixel(xcrd,ycrd):(unsigned char)0;

   430 				*bytePtr++ = (unsigned char) col.iBlue;

   431 				*bytePtr++ = (unsigned char) col.iGreen;

   432 				*bytePtr++ = (unsigned char) col.iRed;

   433 				*bytePtr++ = alpha;	

   434 				}

   435 			}

   436 		}

   437 		break;

   438 		};

   439 

   440 	return NoError;

   441 	}

   442
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