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# include "bitmapConfig.h"
# include <stdlib.h>
# include <stdio.h>
# include <ctype.h>
# include <string.h>
# include "bmintern.h"
# include <sioStdio.h>
# include <appDebugon.h>
/************************************************************************/
/* */
/* Read a WBMP file. */
/* */
/************************************************************************/
static int bmWbmpGetNumber( unsigned int * pNum,
SimpleInputStream * sis )
{
unsigned int num= 0;
unsigned int kontinue= 0x80;
while( kontinue )
{
int c= sioInGetCharacter( sis );
if ( c == EOF )
{ XDEB(c); return -1; }
num= 128* num+ ( c & 0x7f );
kontinue= c & 0x80;
}
*pNum= num; return 0;
}
static int bmWbmpReadWbmp( BitmapDescription * bd,
unsigned char ** pBuffer,
SimpleInputStream * sis )
{
unsigned char * buffer= (unsigned char *)0;
int done;
unsigned int typeField;
int fixHeaderField;
if ( bmWbmpGetNumber( &typeField, sis ) )
{ LDEB(1); return -1; }
if ( typeField != 0 )
{ LDEB(typeField); return -1; }
fixHeaderField= sioInGetCharacter( sis );
if ( fixHeaderField & 0x80 )
{ XDEB(fixHeaderField); return -1; }
if ( bmWbmpGetNumber( &(bd->bdPixelsWide), sis ) )
{ LDEB(1); return -1; }
if ( bmWbmpGetNumber( &(bd->bdPixelsHigh), sis ) )
{ LDEB(1); return -1; }
bd->bdXResolution= bd->bdYResolution= 1;
bd->bdUnit= BMunPIXEL;
bd->bdColorEncoding= BMcoWHITEBLACK;
bd->bdSamplesPerPixel= 1;
bd->bdBitsPerSample= 1;
bd->bdBitsPerPixel= 1;
bmCalculateSizes( bd );
buffer= (unsigned char *)malloc( bd->bdBufferLength );
if ( ! buffer )
{ XDEB(buffer); return -1; }
done= sioInReadBytes( sis, buffer, bd->bdBufferLength );
if ( done != bd->bdBufferLength )
{ LLDEB(done,bd->bdBufferLength); free( buffer ); return -1; }
*pBuffer= buffer;
return 0;
}
int bmReadWbmpFile( const char * filename,
unsigned char ** pBuffer,
BitmapDescription * bd,
int * pPrivateFormat,
double * pCompressionFactor )
{
SimpleInputStream * sis;
sis= sioInStdioOpen( filename );
if ( ! sis )
{ SXDEB(filename,sis); return -1; }
if ( bmWbmpReadWbmp( bd, pBuffer, sis ) )
{ SDEB(filename); sioInClose( sis ); return -1; }
*pPrivateFormat= 0;
sioInClose( sis );
return 0;
}
/************************************************************************/
/* */
/* Write a PGM file. */
/* */
/************************************************************************/
int bmCanWriteWbmpFile( const BitmapDescription * bd,
int privateFormat,
double compressionFactor )
{
if ( bd->bdColorEncoding != BMcoBLACKWHITE &&
bd->bdColorEncoding != BMcoWHITEBLACK )
{ return -1; }
if ( bd->bdBitsPerPixel > 1 )
{ return -1; }
if ( privateFormat != 0 )
{ LDEB(privateFormat); return -1; }
return 0;
}
static void bmWbmpPutNumber( int num,
SimpleOutputStream * sos )
{
unsigned int kontinue= 0x00;
unsigned char bytes[5];
int n= 0;
for (;;)
{
if ( n >= sizeof(bytes) )
{ LLDEB(n,sizeof(bytes)); break; }
bytes[n]= num & 0x7f;
num /= 128;
bytes[n++] |= kontinue;
if ( num == 0 )
{ break; }
kontinue= 0x80;
}
n--;
while( n >= 0 )
{
sioOutPutCharacter( bytes[n], sos );
n--;
}
return;
}
int bmWriteWbmpFile( const char * filename,
const unsigned char * buffer,
const BitmapDescription * bd,
int privateFormat,
double compressionFactor )
{
int done;
SimpleOutputStream * sos;
sos= sioOutStdioOpen( filename );
if ( ! sos )
{ SXDEB(filename,sos); return -1; }
if ( privateFormat != 0 )
{ LDEB(privateFormat); return -1; }
bmWbmpPutNumber( privateFormat, sos );
sioOutPutCharacter( 0, sos );
bmWbmpPutNumber( bd->bdPixelsWide, sos );
bmWbmpPutNumber( bd->bdPixelsHigh, sos );
done= sioOutWriteBytes( sos, buffer, bd->bdBufferLength );
if ( done != bd->bdBufferLength )
{ LLDEB(done,bd->bdBufferLength); sioOutClose( sos ); return -1; }
sioOutClose( sos );
return 0;
}
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