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color.c
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/*
* color.c
*
* Xdisp routines for color map and bar.
*
* Switch_Colormap()
* ColorBar_Scale()
* Resize_ColorBar()
*
* Copyright (c) B. Pike, 1993-1997
*/
#include "xdisp.h"
#include "acr_nema.h"
/*------------------ Switch_Colormap -----------------*/
int Switch_Colormap(caddr_t data)
{
int i, j;
register byte *bptr, tmp_byte;
/* cycle through the color maps */
if (color_table==0)
color_table=1;
else if (color_table==1)
color_table=2;
else
color_table=0;
/* change pixel values if using a TrueColor Visual */
if (Selected_Visual_Class==TrueColor) {
bptr = byte_ColorBar;
for (i=0; i<color_bar_height; i++) {
for (j=0; j<color_bar_width; j++) {
if (j<color_bar_text_width) {
if (XBitmapBitOrder(theDisp)==MSBFirst) {
*bptr++ = 0; /* pad */
*bptr++ = (byte) (newC[bcol].red>>8);
*bptr++ = (byte) (newC[bcol].green>>8);
*bptr++ = (byte) (newC[bcol].blue>>8);
}
else {
*bptr++ = (byte) (newC[bcol].blue>>8);
*bptr++ = (byte) (newC[bcol].green>>8);
*bptr++ = (byte) (newC[bcol].red>>8);
*bptr++ = 0; /* pad */
}
}
else {
tmp_byte = (byte) ((float)((color_bar_height-1)-i)*
255.0/(float)(color_bar_height-1));
if (XBitmapBitOrder(theDisp)==MSBFirst) {
if (color_table == 0) { /* grey scale color table */
*bptr++ = tmp_byte; /* pad */
*bptr++ = tmp_byte; /* red index */
*bptr++ = tmp_byte; /* green index */
*bptr++ = tmp_byte; /* blue index */
}
else if (color_table == 1) { /* hot metal color table */
*bptr++ = tmp_byte; /* pad */
*bptr++ = hot_metal_table[2][(int)tmp_byte]; /* red index */
*bptr++ = hot_metal_table[1][(int)tmp_byte]; /* green index */
*bptr++ = hot_metal_table[0][(int)tmp_byte]; /* blue index */
}
else {
*bptr++ = tmp_byte; /* pad */
*bptr++ = spectral_table[2][(int)tmp_byte]; /* red index */
*bptr++ = spectral_table[1][(int)tmp_byte]; /* green index */
*bptr++ = spectral_table[0][(int)tmp_byte]; /* blue index */
}
}
else {
if (color_table == 0) { /* grey scale color table */
*bptr++ = tmp_byte; /* blue index */
*bptr++ = tmp_byte; /* green index */
*bptr++ = tmp_byte; /* red index */
*bptr++ = tmp_byte; /* pad (not used but could be handy) */
}
else if (color_table == 1) { /* hot metal color table */
*bptr++ = hot_metal_table[2][(int)tmp_byte]; /* blue index */
*bptr++ = hot_metal_table[1][(int)tmp_byte]; /* green index */
*bptr++ = hot_metal_table[0][(int)tmp_byte]; /* red index */
*bptr++ = tmp_byte; /* pad */
}
else {
*bptr++ = spectral_table[2][(int)tmp_byte]; /* blue index */
*bptr++ = spectral_table[1][(int)tmp_byte]; /* green index */
*bptr++ = spectral_table[0][(int)tmp_byte]; /* red index */
*bptr++ = tmp_byte; /* pad */
}
}
}
}
}
}
/* update */
Window_Level(Lower,Upper);
DrawWindow(0,0,zWidth,zHeight);
}
/*------------------------- ColorBar_Scale -------------------------------*/
int ColorBar_Scale(int min, int max)
{
int i, j, skip;
float fval, finc;
byte *tmp_byte;
/* create a tmp array for colorbar index vlaues */
tmp_byte = (byte *) malloc(color_bar_height);
/* create a single index column */
if (min<max) {
finc = (float)(P_Max-P_Min)/(float)(color_bar_height-1);
for (i=0; i<color_bar_height; i++) {
fval = P_Max - ((float) i * finc);
if ( fval <= (float) min )
tmp_byte[i] = 0;
else if ( fval >= (float) max )
tmp_byte[i] = 255;
else
tmp_byte[i] = (byte) (255.0 * (fval-(float)min)/((float)(max-min)));
}
}
else if (min>max) {
finc = (float)(P_Min-P_Max)/(float)(color_bar_height-1);
for (i=0; i<color_bar_height; i++) {
fval = P_Min - ((float) i * finc);
if ( fval >= (float) min )
tmp_byte[i] = 255;
else if ( fval <= (float) max )
tmp_byte[i] = 0;
else
tmp_byte[i] = (byte) (255.0 * (fval-(float)max)/((float)(min-max)));
}
}
else { /* min=max */
finc = (float)(P_Max-P_Min)/255.0;
for (i=0; i<color_bar_height; i++) {
fval = P_Max - ((float) i * finc);
if ( fval <= (float) min )
tmp_byte[i] = 0;
else
tmp_byte[i] = 255;
}
}
/* perform Gamma correction if necessary */
if (Gamma != 1.0) {
for (i=0; i<color_bar_height; i++) {
tmp_byte[i] = Gamma_Table[tmp_byte[i]];
}
}
/* fill the color bar */
for (i=0; i<color_bar_height; i++) {
skip = i*color_bar_width*4;
for(j=color_bar_text_width*4; j<color_bar_width*4; j+=4) {
if (XBitmapBitOrder(theDisp)==MSBFirst) {
if (color_table == 0) { /* grey scale color table */
byte_ColorBar[skip+j+3] = tmp_byte[i]; /* blue index */
byte_ColorBar[skip+j+2] = tmp_byte[i]; /* green index */
byte_ColorBar[skip+j+1] = tmp_byte[i]; /* red index */
byte_ColorBar[skip+j+0] = tmp_byte[i]; /* pad (not used but could be handy) */
}
else if (color_table == 1) { /* hot metal color table */
byte_ColorBar[skip+j+3] = hot_metal_table[2][(int)tmp_byte[i]]; /* blue index */
byte_ColorBar[skip+j+2] = hot_metal_table[1][(int)tmp_byte[i]]; /* green index */
byte_ColorBar[skip+j+1] = hot_metal_table[0][(int)tmp_byte[i]]; /* red index */
byte_ColorBar[skip+j+0] = tmp_byte[i]; /* pad */
}
else { /* spectral color table */
byte_ColorBar[skip+j+3] = spectral_table[2][(int)tmp_byte[i]]; /* blue index */
byte_ColorBar[skip+j+2] = spectral_table[1][(int)tmp_byte[i]]; /* green index */
byte_ColorBar[skip+j+1] = spectral_table[0][(int)tmp_byte[i]]; /* red index */
byte_ColorBar[skip+j+0] = tmp_byte[i]; /* pad */
}
}
else {
if (color_table == 0) { /* grey scale color table */
byte_ColorBar[skip+j] = tmp_byte[i]; /* blue index */
byte_ColorBar[skip+j+1] = tmp_byte[i]; /* green index */
byte_ColorBar[skip+j+2] = tmp_byte[i]; /* red index */
byte_ColorBar[skip+j+3] = tmp_byte[i]; /* pad (not used but could be handy) */
}
else if (color_table == 1) { /* hot metal color table */
byte_ColorBar[skip+j] = hot_metal_table[2][(int)tmp_byte[i]]; /* blue index */
byte_ColorBar[skip+j+1] = hot_metal_table[1][(int)tmp_byte[i]]; /* green index */
byte_ColorBar[skip+j+2] = hot_metal_table[0][(int)tmp_byte[i]]; /* red index */
byte_ColorBar[skip+j+3] = tmp_byte[i]; /* pad */
}
else { /* spectral color table */
byte_ColorBar[skip+j] = spectral_table[2][(int)tmp_byte[i]]; /* blue index */
byte_ColorBar[skip+j+1] = spectral_table[1][(int)tmp_byte[i]]; /* green index */
byte_ColorBar[skip+j+2] = spectral_table[0][(int)tmp_byte[i]]; /* red index */
byte_ColorBar[skip+j+3] = tmp_byte[i]; /* pad */
}
}
}
}
/* clear workspace */
free(tmp_byte);
return(1);
}
/*--------------------------- Resize_ColorBar -------------------------*/
int Resize_ColorBar(int w, int h)
{
byte *tmp_byte;
/* interpolate color bar */
if (Verbose) fprintf(stderr,"Resizing color bar to %dx%d ...",w,h);
tmp_byte = (byte *) malloc((bitmap_pad/8)*color_bar_width*color_bar_height);
memcpy(tmp_byte,byte_ColorBar,(bitmap_pad/8)*color_bar_width*color_bar_height);
free(byte_ColorBar);
byte_ColorBar=(byte *) malloc((bitmap_pad/8)*w*h);
if (bitmap_pad == 8) {
if (Interpolation_Type==BILINEAR) {
bilinear_byte_to_byte ( &tmp_byte[0], color_bar_width, color_bar_height,
&byte_ColorBar[0], w, h );
}
else {
nneighbour_byte_to_byte ( &tmp_byte[0], color_bar_width, color_bar_height,
&byte_ColorBar[0], w, h );
}
}
else {
if (Interpolation_Type==BILINEAR) {
bilinear_rgbp_to_rgbp ( &tmp_byte[0], color_bar_width, color_bar_height,
&byte_ColorBar[0], w, h );
}
else{
nneighbour_rgbp_to_rgbp ( &tmp_byte[0], color_bar_width, color_bar_height,
&byte_ColorBar[0], w, h );
}
}
color_bar_width = w;
color_bar_height = h;
theColorBar->data=&byte_ColorBar[0];
theColorBar->height=h;
theColorBar->width=w;
theColorBar->bytes_per_line=(bitmap_pad/8)*w;
free(tmp_byte);
if (Verbose) fprintf(stderr,"Done.\n");
}