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# include "bitmapConfig.h"
# include "bmintern.h"
# include <string.h>
# include <appDebugon.h>
/************************************************************************/
/* */
/* Call a function for all pixels that have value '1' in a bitmap */
/* image. [Or '0'.. when invertMaskIn == 0xff.]. */
/* */
/* Used inside morphology code and to extract features from the */
/* result. */
/* */
/* The behavior with ( invertMaskIn != 0xff && invertMaskIn != 0x00 ) */
/* is completely predictable, buf not what this routine was meant for. */
/* */
/* 1) Determine the mask to ignore the trailing bits in the input */
/* image. */
/* */
/************************************************************************/
void bmForAll1Pixels( const BitmapDescription * bdIn,
const unsigned char * bufIn,
unsigned char invertMaskIn,
void * through,
BM_PIX_FUN pixFun )
{
int rowIn;
unsigned char lastMaskIn;
int col;
if ( bdIn->bdBitsPerPixel != 1 )
{ LLDEB(bdIn->bdBitsPerPixel,bdIn->bdBitsPerPixel!=1); }
/* 1 */
lastMaskIn= 0xff;
lastMaskIn >>= ( bdIn->bdPixelsWide % 8 );
lastMaskIn <<= ( bdIn->bdPixelsWide % 8 );
for ( rowIn= 0; rowIn < bdIn->bdPixelsHigh; rowIn++ )
{
const unsigned char * rowBufIn= bufIn+ rowIn* bdIn->bdBytesPerRow;
for ( col= 0; col < bdIn->bdPixelsWide; rowBufIn++, col += 8 )
{
unsigned char val= ( rowBufIn[0] ^ invertMaskIn );
unsigned char mask= 0x80;
int pix;
if ( col+ 8 >= bdIn->bdPixelsWide )
{ val &= lastMaskIn; }
if ( ! val )
{ continue; }
for ( pix= 0; pix < 8; mask >>= 1, pix++ )
{
int colIn= col+ pix;
if ( ! ( val & mask ) )
{ continue; }
(*pixFun)( through, rowIn, colIn );
}
}
}
return;
}
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