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# include "bitmapConfig.h"
# include "bmintern.h"
# define y0 math_y0
# define y1 math_y1
# include <math.h>
# undef y0
# undef y1
# include <appDebugon.h>
/************************************************************************/
/* */
/* Map the values of the samples for the individual color components. */
/* */
/************************************************************************/
static void bmMapLine8( unsigned char * b,
const int * map,
int bypr,
int spp )
{
int i;
int j;
j= 0;
for ( i= 0; i < bypr; i++ )
{
*b= map[spp* *b+ ( j % spp )]; j++;
b++;
}
return;
}
static void bmMapLine4( unsigned char * b,
const int * map,
int bypr,
int spp )
{
int i;
int j;
j= 0;
for ( i= 0; i < bypr; i++ )
{
unsigned char us= 0;
us |= map[ spp* ( ( *b & 0x0f ) >> 0 ) + ( j % spp ) ] << 0; j++;
us |= map[ spp* ( ( *b & 0xf0 ) >> 4 ) + ( j % spp ) ] << 4; j++;
*(b++)= us;
}
return;
}
static void bmMapLine2( unsigned char * b,
const int * map,
int bypr,
int spp )
{
int i;
int j;
j= 0;
for ( i= 0; i < bypr; i++ )
{
unsigned char us= 0;
us |= map[ spp* ( ( *b & 0x03 ) >> 0 ) + ( j % spp ) ] << 0; j++;
us |= map[ spp* ( ( *b & 0x0c ) >> 2 ) + ( j % spp ) ] << 2; j++;
us |= map[ spp* ( ( *b & 0x30 ) >> 4 ) + ( j % spp ) ] << 4; j++;
us |= map[ spp* ( ( *b & 0xc0 ) >> 6 ) + ( j % spp ) ] << 6; j++;
*(b++)= us;
}
return;
}
static void bmMapLine1( unsigned char * b,
const int * map,
int bypr,
int spp )
{
int i;
int j;
j= 0;
for ( i= 0; i < bypr; i++ )
{
unsigned char us= 0;
us |= map[ spp* ( ( *b & 0x01 ) >> 0 ) + ( j % spp ) ] << 0; j++;
us |= map[ spp* ( ( *b & 0x02 ) >> 1 ) + ( j % spp ) ] << 1; j++;
us |= map[ spp* ( ( *b & 0x04 ) >> 2 ) + ( j % spp ) ] << 2; j++;
us |= map[ spp* ( ( *b & 0x08 ) >> 3 ) + ( j % spp ) ] << 3; j++;
us |= map[ spp* ( ( *b & 0x10 ) >> 4 ) + ( j % spp ) ] << 4; j++;
us |= map[ spp* ( ( *b & 0x20 ) >> 5 ) + ( j % spp ) ] << 5; j++;
us |= map[ spp* ( ( *b & 0x40 ) >> 6 ) + ( j % spp ) ] << 6; j++;
us |= map[ spp* ( ( *b & 0x80 ) >> 7 ) + ( j % spp ) ] << 7; j++;
*(b++)= us;
}
return;
}
int bmMapImageColors( const BitmapDescription * bd,
const int * map,
unsigned char * buffer )
{
int i;
int spp= bd->bdSamplesPerPixel;
int bypr= bd->bdBytesPerRow;
switch( bd->bdColorEncoding )
{
case BMcoBLACKWHITE:
case BMcoWHITEBLACK:
case BMcoRGB:
switch( bd->bdBitsPerSample )
{
case 1:
for ( i= 0; i < bd->bdPixelsHigh; i++ )
{ bmMapLine1( buffer+ i* bypr, map, bypr, spp ); }
break;
case 2:
for ( i= 0; i < bd->bdPixelsHigh; i++ )
{ bmMapLine2( buffer+ i* bypr, map, bypr, spp ); }
break;
case 4:
for ( i= 0; i < bd->bdPixelsHigh; i++ )
{ bmMapLine4( buffer+ i* bypr, map, bypr, spp ); }
break;
case 8:
for ( i= 0; i < bd->bdPixelsHigh; i++ )
{ bmMapLine8( buffer+ i* bypr, map, bypr, spp ); }
break;
default:
LLDEB(bd->bdColorEncoding,bd->bdBitsPerSample);
return -1;
}
break;
case BMcoRGB8PALETTE:
switch( spp )
{
RGB8Color * rgb8;
case 3:
rgb8= bd->bdRGB8Palette;
for ( i= 0; i < bd->bdColorCount; rgb8++, i++ )
{
rgb8->rgb8Red= map[spp* rgb8->rgb8Red+ 0];
rgb8->rgb8Green= map[spp* rgb8->rgb8Green+ 1];
rgb8->rgb8Blue= map[spp* rgb8->rgb8Blue+ 2];
}
break;
case 4:
rgb8= bd->bdRGB8Palette;
for ( i= 0; i < bd->bdColorCount; rgb8++, i++ )
{
rgb8->rgb8Red= map[spp* rgb8->rgb8Red+ 0];
rgb8->rgb8Green= map[spp* rgb8->rgb8Green+ 1];
rgb8->rgb8Blue= map[spp* rgb8->rgb8Blue+ 2];
rgb8->rgb8Alpha= map[spp* rgb8->rgb8Red+ 3];
}
break;
default:
LLDEB(bd->bdColorEncoding,spp);
return -1;
}
break;
default:
LDEB(bd->bdColorEncoding);
return -1;
}
return 0;
}
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