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#include "tkpict.h"
extern Tcl_Interp *interp;
PictColorTable *PowColorTable;
XColor lut_colorcell_defs[MAX_COLORS];
int byteLookup[MAX_LOOKUP];
double lastLookupMin=0.0, lastLookupMax=0.0;
static int convert_block( void *in, int npts, int in_type,
double *dispmin, double *dispmax,
unsigned char *out, unsigned int *histo );
/***************************************************/
/* Wrappers to convert_block which will either */
/* convert the image data to bytes (translated */
/* using byteLookup[]) or calculate a histogram */
/* of the image data (of length MAX_LOOKUP). */
/***************************************************/
int convert_block_to_byte( void *in, unsigned char *out, int npts,
int in_type, double *dispmin, double *dispmax )
{
if( (lastLookupMin==0.0 && lastLookupMax==0.0)
|| (*dispmin==0.0 && *dispmax==0.0) ) {
return convert_block( in, npts, in_type, dispmin, dispmax, out, NULL );
} else {
return convert_block( in, npts, in_type,
&lastLookupMin, &lastLookupMax, out, NULL );
}
}
int convert_block_to_histo( void *in, int npts, int in_type,
double *dispmin, double *dispmax,
unsigned int *histo )
{
return convert_block( in, npts, in_type, dispmin, dispmax, NULL, histo );
}
/***************************************************/
/* Internal routine called by above wrappers */
/***************************************************/
static int convert_block( void *in, int npts, int in_type,
double *dispmin, double *dispmax,
unsigned char *out, unsigned int *histo )
{
register int i;
double scale;
unsigned char *ptr_out;
double holder, maxLookup;
if( histo )
for( i=0; i<MAX_LOOKUP; i++ ) histo[i] = 0;
maxLookup = MAX_LOOKUP - 1.0;
ptr_out = (unsigned char*)out;
switch (in_type)
{
case BYTE:
{
unsigned char *ptr = (unsigned char *)in;
unsigned char min, max;
if( (*dispmin == 0.0) && (*dispmax == 0.0) ) {
min = max = *ptr++;
for (i=1;i<npts;++i,++ptr) {
if( *ptr > max ) max = *ptr;
else if( *ptr < min ) min = *ptr;
}
*dispmin = min;
*dispmax = max;
ptr = (unsigned char *)in;
}
if( (*dispmax-*dispmin) == 0.0 ) {
if( histo )
histo[ MAX_LOOKUP>>1 - 1 ] = npts;
else if( out )
for( i=npts; i--; ) *ptr_out++ = 127;
} else {
scale = maxLookup / (*dispmax - *dispmin);
for( i=npts; i--; ) {
holder = scale * (*ptr++ - *dispmin);
if( holder > maxLookup )
holder = maxLookup;
else if( holder < 0.0 )
holder = 0.0;
if( histo )
histo[ (int)holder ]++;
else if( out )
*ptr_out++ = byteLookup[ (int)holder ];
}
}
}
break;
case WORD:
{
short *ptr = (short *)in;
short min, max;
if( (*dispmin == 0.0) && (*dispmax == 0.0) ) {
min = max = *ptr++;
for (i=1;i<npts;++i,++ptr) {
if( *ptr > max ) max = *ptr;
else if( *ptr < min ) min = *ptr;
}
*dispmin = min;
*dispmax = max;
ptr = (short *)in;
}
if( (*dispmax-*dispmin) == 0.0 ) {
if( histo )
histo[ MAX_LOOKUP>>1 - 1 ] = npts;
else if( out )
for( i=npts; i--; ) *ptr_out++ = 127;
} else {
scale = maxLookup / (*dispmax - *dispmin);
for( i=npts; i--; ) {
holder = scale * (*ptr++ - *dispmin);
if( holder > maxLookup )
holder = maxLookup;
else if( holder < 0.0 )
holder = 0.0;
if( histo )
histo[ (int)holder ]++;
else if( out )
*ptr_out++ = byteLookup[ (int)holder ];
}
}
}
break;
case LWORD:
{
int *ptr = (int *)in;
int min, max;
if( (*dispmin == 0.0) && (*dispmax == 0.0) ) {
min = max = *ptr++;
for (i=1;i<npts;++i,++ptr) {
if( *ptr > max ) max = *ptr;
else if( *ptr < min ) min = *ptr;
}
*dispmin = min;
*dispmax = max;
ptr = (int *)in;
}
if( (*dispmax-*dispmin) == 0.0 ) {
if( histo )
histo[ MAX_LOOKUP>>1 - 1 ] = npts;
else if( out )
for( i=npts; i--; ) *ptr_out++ = 127;
} else {
scale = maxLookup / (*dispmax - *dispmin);
for( i=npts; i--; ) {
holder = scale * (*ptr++ - *dispmin);
if( holder > maxLookup )
holder = maxLookup;
else if( holder < 0.0 )
holder = 0.0;
if( histo )
histo[ (int)holder ]++;
else if( out )
*ptr_out++ = byteLookup[ (int)holder ];
}
}
}
break;
case REAL:
{
float *ptr = (float *)in;
float min, max;
if( (*dispmin == 0.0) && (*dispmax == 0.0) ) {
min = max = *ptr++;
for (i=1;i<npts;++i,++ptr) {
if( *ptr > max ) max = *ptr;
else if( *ptr < min ) min = *ptr;
}
*dispmin = min;
*dispmax = max;
ptr = (float *)in;
}
if( (*dispmax-*dispmin) == 0.0 ) {
if( histo )
histo[ MAX_LOOKUP>>1 - 1 ] = npts;
else if( out )
for( i=npts; i--; ) *ptr_out++ = 127;
} else {
scale = maxLookup / (*dispmax - *dispmin);
for( i=npts; i--; ) {
holder = scale * (*ptr++ - *dispmin);
if( holder > maxLookup )
holder = maxLookup;
else if( holder < 0.0 )
holder = 0.0;
if( histo )
histo[ (int)holder ]++;
else if( out )
*ptr_out++ = byteLookup[ (int)holder ];
}
}
}
break;
case DOUBLE:
{
double *ptr = (double *)in;
double min, max;
if( (*dispmin == 0.0) && (*dispmax == 0.0) ) {
min = max = *ptr++;
for (i=1;i<npts;++i,++ptr) {
if( *ptr > max ) max = *ptr;
else if( *ptr < min ) min = *ptr;
}
*dispmin = min;
*dispmax = max;
ptr = (double*)in;
}
if( (*dispmax-*dispmin) == 0.0 ) {
if( histo )
histo[ MAX_LOOKUP>>1 - 1 ] = npts;
else if( out )
for( i=npts; i--; ) *ptr_out++ = 127;
} else {
scale = maxLookup / (*dispmax - *dispmin);
for( i=npts; i--; ) {
holder = scale * (*ptr++ - *dispmin);
if( holder > maxLookup )
holder = maxLookup;
else if( holder < 0.0 )
holder = 0.0;
if( histo )
histo[ (int)holder ]++;
else if( out )
*ptr_out++ = byteLookup[ (int)holder ];
}
}
}
break;
case LONGLONG:
{
#ifdef __WIN32__
__int64 *ptr = (__int64*)in;
__int64 min, max;
#else
long long *ptr = (long long*)in;
long long min, max;
#endif
if( (*dispmin == 0.0) && (*dispmax == 0.0) ) {
min = max = *ptr++;
for (i=1;i<npts;++i,++ptr) {
if( *ptr > max ) max = *ptr;
else if( *ptr < min ) min = *ptr;
}
*dispmin = min;
*dispmax = max;
#ifdef __WIN32__
ptr = (__int64*)in;
#else
ptr = (long long*)in;
#endif
}
if( (*dispmax-*dispmin) == 0.0 ) {
if( histo )
histo[ MAX_LOOKUP>>1 - 1 ] = npts;
else if( out )
for( i=npts; i--; ) *ptr_out++ = 127;
} else {
scale = maxLookup / (*dispmax - *dispmin);
for( i=npts; i--; ) {
holder = scale * (*ptr++ - *dispmin);
if( holder > maxLookup )
holder = maxLookup;
else if( holder < 0.0 )
holder = 0.0;
if( histo )
histo[ (int)holder ]++;
else if( out )
*ptr_out++ = byteLookup[ (int)holder ];
}
}
}
break;
default:
(void)fprintf(stderr,"Unknown data type %d\n",in_type);
return(0);
}
return(1);
} /* end convert_block */
void equalize_histo( void *in_data, int data_type, unsigned int totalPix,
double *min, double *max )
{
unsigned int histo[MAX_LOOKUP], excess;
int color, level, done;
double bin, pixbin, lvl;
int bottBin, topBin;
/* Calculate histogram */
done = 0;
do {
convert_block_to_histo(in_data, totalPix, data_type, min, max, histo);
pixbin = (double)(totalPix - (totalPix>1?1:0)) / 256.0;
if( pixbin>1.0 ) {
/* Reduce the excessively abundant levels to a single binwidth */
pixbin *= 3.0;
excess = 0;
for( level=0; level<MAX_LOOKUP; level++ )
if( histo[level]>pixbin ) {
excess += (unsigned int)((histo[level]-pixbin-0.5));
histo[level] = (unsigned int)(pixbin+0.5);
}
pixbin = (double)(totalPix - (totalPix>1?1:0) - excess) / 256.0;
if( pixbin < 1.0 ) pixbin=1.0;
}
/* Create new color table */
bin = 0.0;
for( level=color=0; level<MAX_LOOKUP-1 && color<255; level++) {
byteLookup[level] = color;
bin += histo[level];
while( bin>=pixbin && color<255 ) {
bin -= pixbin;
color++;
}
}
while( level<MAX_LOOKUP ) byteLookup[level++] = 255;
/* Calculate the binwidth of the 5 and 250 color mark */
bottBin = topBin = -1;
for( level=1; level<MAX_LOOKUP; level++ ) {
if( bottBin < 0 && byteLookup[level] > 5 )
bottBin = level-1;
if( topBin < 0 && byteLookup[level] > 250 )
topBin = level;
}
if( topBin - bottBin < MAX_LOOKUP>>3 ) {
if( bottBin > 0 ) bottBin--;
if( topBin < MAX_LOOKUP-1 ) topBin++;
lvl = (*max-*min)/(MAX_LOOKUP-1.0);
if( topBin-bottBin>2 || lvl>1e-6*fabs(*min) ) {
*max = topBin * lvl + *min;
*min = bottBin * lvl + *min;
} else
done = 1;
} else {
done = 1;
}
} while( ! done );
}
void build_lookup( int *x_lut, int *y_lut, int nbpts )
{
int j;
double slope;
int curr_pt;
curr_pt = 0;
slope = 0.0;
for( j=0; j<x_lut[0]; j++ )
byteLookup[j] = y_lut[0];
for( j=x_lut[0]; j<x_lut[nbpts-1]; j++ ) {
if( j < x_lut[curr_pt] ) {
byteLookup[j] = (unsigned int)((j-x_lut[curr_pt])*slope + y_lut[curr_pt]);
if( byteLookup[j] < 0 )
byteLookup[j] = 0;
else if( byteLookup[j] > 255 )
byteLookup[j] = 255;
} else {
byteLookup[j] = y_lut[curr_pt];
if( byteLookup[j] < 0 )
byteLookup[j] = 0;
else if( byteLookup[j] > 255 )
byteLookup[j] = 255;
/* remove vertical ramps */
while( curr_pt<nbpts-1 && (x_lut[curr_pt+1]-x_lut[curr_pt])==0 )
curr_pt++;
/* compute new slope */
if( curr_pt< nbpts-1 ) {
curr_pt++;
slope = (double)(y_lut[curr_pt]-y_lut[curr_pt-1])/
(double)(x_lut[curr_pt]-x_lut[curr_pt-1]);
}
}
}
for(j=x_lut[nbpts-1];j<MAX_LOOKUP;j++) {
byteLookup[j] = 255;
}
}
/********************/
/* Other routines */
/********************/
/* Copy new lut into cmap */
/* Copy ncolors colors from argument arrays to color cells, and
load into cmap to change the colors on the X display */
void put_lut(Display *disp,Colormap cmap,
int ncolors,int lut_start,char overlay,
int *red,int *green,int *blue,
int *intensity_lut,int *red_lut,int *green_lut,int *blue_lut)
{
int i,j;
int index;
int background_index;
int mod_lstart;
#if !(defined(__WIN32__) || defined(macintosh))
int pseudoImages;
#endif
#ifdef DEBUG
printf("put_lut\n");
#endif
if(overlay == False) {
for (i=lut_start,j=0; j<ncolors; i++,j++) {
index = intensity_lut[j];
lut_colorcell_defs[i].pixel = i;
lut_colorcell_defs[i].red = (unsigned short) (red_lut[red[index]]<<8) ;
lut_colorcell_defs[i].green = (unsigned short) (green_lut[green[index]]<<8) ;
lut_colorcell_defs[i].blue = (unsigned short) (blue_lut[blue[index]]<<8) ;
lut_colorcell_defs[i].flags = DoRed | DoBlue | DoGreen;
}
} else {
mod_lstart = lut_start%2; /* helpful if we decide one day that lut_start should
be odd and not even as it is hard-coded now */
for (i=lut_start,j=0; j<ncolors; i++,j++) {
index = intensity_lut[j];
if( i%2==mod_lstart) {
lut_colorcell_defs[i].red = (unsigned short) (red_lut[red[index]]<<8) ;
lut_colorcell_defs[i].green = (unsigned short) (green_lut[green[index]]<<8) ;
lut_colorcell_defs[i].blue = (unsigned short) (blue_lut[blue[index]]<<8) ;
} else {
lut_colorcell_defs[i].red = (unsigned short) 0xfffffff;
if( index < 50 )
background_index = ncolors-1-50;
else background_index = ncolors-1-index;
lut_colorcell_defs[i].green = (unsigned short) (green_lut[green[background_index]]<<8) ;
lut_colorcell_defs[i].blue = (unsigned short) (blue_lut[blue[background_index]]<<8) ;
}
lut_colorcell_defs[i].flags = DoRed | DoBlue | DoGreen;
}
}
#if !(defined(__WIN32__) || defined(macintosh))
Tcl_GetInt(interp,Tcl_GetVar(interp,"powPseudoImages",TCL_GLOBAL_ONLY),
&pseudoImages);
if(pseudoImages) {
XStoreColors(disp,cmap,&lut_colorcell_defs[lut_start],ncolors) ;
XFlush(disp) ;
}
#endif
} /* end put_lut */
int AllocateColorTable(PictColorTable **colorTable,Display *disp,
Colormap cmap,int colormap_level,int ncolors,
int lut_start,char atom)
{
int color_nb;
int i,r;
/* Allocate memory */
(*colorTable) = (PictColorTable*)ckalloc(sizeof(PictColorTable));
if((*colorTable) == NULL) {
(void)fprintf(stderr,"ImgPictGet: Could not allocate memory\n");
return 0;
}
/* store values */
(*colorTable)->display = disp;
(*colorTable)->colormap = cmap;
(*colorTable)->colormap_level = colormap_level;
(*colorTable)->ncolors = ncolors;
(*colorTable)->lut_start = lut_start;
(*colorTable)->atom = atom;
(*colorTable)->refCount = 1;
color_nb = ncolors-1;
for( i=0; i<MAX_LOOKUP; i++ )
byteLookup[ i ] = i * 256 / MAX_LOOKUP;
/* load linear intensity lookup table */
for (i=0; i<ncolors; i++) {
(*colorTable)->intensity_lut[i] = i;
}
/* load linear red green blue lookup tables */
for (i=0; i<MAX_COLORS; i++) {
(*colorTable)->red_lut[i] = i;
(*colorTable)->green_lut[i] = i;
(*colorTable)->blue_lut[i] = i;
}
for (i = 0; i < MAX_COLORS; ++i) {
r = i*color_nb/(MAX_COLORS-1)+lut_start;
(*colorTable)->redValues[i] = lut_colorcell_defs[r].pixel;
}
/* Load the gray color pattern */
gray(disp,cmap,ncolors,lut_start,False,
(*colorTable)->red,
(*colorTable)->green,
(*colorTable)->blue,
(*colorTable)->intensity_lut,
(*colorTable)->red_lut,
(*colorTable)->green_lut,
(*colorTable)->blue_lut);
return 1;
} /* end AllocateColorTable */
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