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/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* colortab.c - allocate and control dynamic color table. |
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* |
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* histogram is cleared. This algorithm |
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* performs only as well as the next drawing's color |
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* distribution is correlated to the last. |
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* |
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* External symbols declared in drvier.h |
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*/ |
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#include "standard.h" |
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#include "copyright.h" |
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#include <string.h> |
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#include "standard.h" |
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#include "color.h" |
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#include "driver.h" |
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/* histogram resolution */ |
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#define NRED 24 |
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#define NGRN 32 |
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/* initial color cube boundary */ |
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static int CLRCUBE[3][2] = {{0,NRED},{0,NGRN},{0,NBLU}}; |
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static int split(), cut(); |
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static int split(); |
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static void cut(); |
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int |
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return(0); |
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/* free old tables */ |
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if (clrtab != NULL) |
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free((char *)clrtab); |
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free((void *)clrtab); |
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if (ctree != NULL) |
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free((char *)ctree); |
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free((void *)ctree); |
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/* get new tables */ |
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for (treesize = 1; treesize < ncolors; treesize <<= 1) |
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; |
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/* partition color space */ |
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cut(ctree, 0, CLRCUBE, 0, ncolors); |
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/* clear histogram */ |
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bzero((char *)histo, sizeof(histo)); |
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memset((void *)histo, '\0', sizeof(histo)); |
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/* return number of colors used */ |
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return(ncolors); |
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} |
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int |
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get_pixel(col, set_pixel) /* get pixel for color */ |
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COLOR col; |
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int (*set_pixel)(); |
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extern int |
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get_pixel( /* get pixel for color */ |
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COLOR col, |
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dr_newcolrf_t *newcolr |
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) |
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{ |
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extern char errmsg[]; |
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int r, g, b; |
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int cv[3]; |
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register CNODE *tp; |
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h, r, g, b, clrtab[h].n); |
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eputs(errmsg); |
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#endif |
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(*set_pixel)(h, r, g, b); |
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(*newcolr)(h, r, g, b); |
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} |
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return(h); /* return pixel value */ |
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} |
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void |
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make_gmap(gam) /* make gamma correction map */ |
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double gam; |
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{ |
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} |
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void |
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set_cmap(rmap, gmap, bmap) /* set custom color correction map */ |
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BYTE *rmap, *gmap, *bmap; |
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{ |
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bcopy((char *)rmap, (char *)clrmap[RED], 256); |
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bcopy((char *)gmap, (char *)clrmap[GRN], 256); |
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bcopy((char *)bmap, (char *)clrmap[BLU], 256); |
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memcpy((void *)clrmap[RED], (void *)rmap, 256); |
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memcpy((void *)clrmap[GRN], (void *)gmap, 256); |
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memcpy((void *)clrmap[BLU], (void *)bmap, 256); |
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} |
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void |
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map_color(rgb, col) /* map a color to a byte triplet */ |
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BYTE rgb[3]; |
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COLOR col; |
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} |
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static |
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static void |
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cut(tree, level, box, c0, c1) /* partition color space */ |
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register CNODE *tree; |
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int level; |
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} |
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/* split box */ |
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*tree = split(box); |
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bcopy((char *)box, (char *)kb, sizeof(kb)); |
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memcpy((void *)kb, (void *)box, sizeof(kb)); |
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/* do left (lesser) branch */ |
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kb[prim(*tree)][1] = part(*tree); |
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cut(tree+(1<<level), level+1, kb, c0, (c0+c1)>>1); |
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#define c0 r |
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register int r, g, b; |
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int pri; |
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int t[HMAX], med; |
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long t[HMAX], med; |
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/* find dominant axis */ |
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pri = RED; |
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if (box[GRN][1]-box[GRN][0] > box[pri][1]-box[pri][0]) |
