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/* for TEST: gcc -DTEST -g -o foo imfilter.c imregions.o -lm */
#ifdef TEST
#include <stdio.h>
#include <math.h>
#define IMFILTRTN _FilterImage
#define NMASK 0
#define MASKDIM 0
#define _masks NULL
#define NSHAPE 2
#define NREGION 2
#define FILTER ((imcircle(g,1,1,1,4,(double)x,(double)y,8.0,8.0,5.0)))&&(imcircle(g,2,2,0,1,(double)x,(double)y,8.0,8.0,3.0))
#define FILTSTR "((imcircle(g,1,1,1,4,(double)x,(double)y,8.0,8.0,5.0)))&&(imcircle(g,2,2,0,1,(double)x,(double)y,8.0,8.0,3.0))"
#define FINIT imcirclei(g,1,1,1,4,(double)x,(double)y,8.0,8.0,5.0);imcirclei(g,2,2,0,1,(double)x,(double)y,8.0,8.0,3.0);
#include "regions.h"
#endif
/* these are global for use with special region routines */
FilterMask masks=NULL; /* array valid region masks for one row */
int maxmask; /* max masks allocated thus far */
int nmask; /* number of mask segments */
int nreg; /* number of regions in this set of rows */
int rid; /* first valid region for current pixel */
int x, y; /* current row and column */
int rlen; /* length of temp region buf */
int *rbuf; /* temp region flags */
int *rptr; /* pointer into region buffer */
void incnmask(void)
{
int omax;
nmask++;
if( nmask >= maxmask ){
omax = maxmask;
maxmask += MASKINC;
masks = (FilterMask)realloc(masks, maxmask*sizeof(FilterMaskRec));
memset(masks+omax, 0, (maxmask-omax)*sizeof(FilterMaskRec));
}
}
FilterMask
IMFILTRTN(int txmin, int txmax, int tymin, int tymax, int tblock, int *got)
{
int i, j;
int fieldonly;
GFilt g;
Scan scan, tscan;
/* make sure we have something to process */
if( NSHAPE <=0 ){
*got = 0;
return NULL;
}
/* allocate space for the globals */
g = (GFilt)calloc(1, sizeof(GFiltRec));
/* see if we have only the field shape */
fieldonly = (NSHAPE==1) && strstr(FILTSTR, "field");
/* allocate region records */
g->nshapes = NSHAPE;
g->maxshapes = (NSHAPE*(XSNO+1))+1;
g->shapes = (Shape)calloc(g->maxshapes, sizeof(ShapeRec));
/* make sure we start at 1 */
g->block= max(1,tblock);
g->xmin = max(1,txmin);
g->xmax = txmax;
g->ymin = max(1,tymin);
g->ymax = tymax;
/* get x and y limits on subsection */
g->x0 = 1;
g->y0 = 1;
g->x1 = (g->xmax-g->xmin)/g->block+1;
g->y1 = (g->ymax-g->ymin)/g->block+1;
/* allocate a temp region buffer */
rlen = g->x1 - g->x0 + 1;
rbuf = (int *)calloc(rlen+1, sizeof(int));
/* allocate an array of masks, which will be written to caller */
maxmask = MASKINC;
masks = (FilterMask)calloc(maxmask, sizeof(FilterMaskRec));
/* seed the first region mask value */
nmask = 0;
masks[nmask].region = 0;
/* keep track of how many hits we had for this set of rows */
nreg = 0;
/* allocate a buffer for valid y row flags */
g->ybuf = (int *)calloc(g->y1+1, sizeof(int));
g->x0s = (int *)calloc(g->y1+1, sizeof(int));
g->x1s = (int *)calloc(g->y1+1, sizeof(int));
/* seed impossible values for x limits */
for(i=0; i<=g->y1; i++) g->x0s[i] = g->x1;
for(i=0; i<=g->y1; i++) g->x1s[i] = g->x0;
/* save image mask values */
if( NMASK ){
g->nmask = NMASK;
g->maskdim = MASKDIM;
g->masks = _masks;
}
/* initialize ybuf */
FINIT;
/* process all valid rows */
for(y=g->y0; y<=g->y1; y++){
if( fieldonly ){
/* inc the mask count, (extend mask array, if necessary) */
masks[nmask].region = 1;
masks[nmask].y = y - g->y0 + 1;
masks[nmask].xstart = 1;
masks[nmask].xstop = (g->x1 - g->x0 + 1);
incnmask();
continue;
}
if( g->ybuf[y] ){
/* to start this line, we make a seed mask with no region */
if( masks[nmask].region ){
/* inc the mask count, (extend mask array, if necessary) */
incnmask();
masks[nmask].region = 0;
}
/* process each pixel in this row where there is a region */
for(x=g->x0s[y], rptr=&rbuf[1+(g->x0s[y]-g->x0)]; x<=g->x1s[y];
x++, rptr++){
/* get filter result, which is the region id or 0 */
g->rid = 0;
if( FILTER ){
/* never change a region id to a -1 */
if( *rptr == 0 ){
nreg++;
*rptr = g->rid ? g->rid : -1;
}
/* but always overwrite a -1 */
else if( (*rptr == -1) && (g->rid >0) ){
*rptr = g->rid;
}
}
}
}
/* if we have processed a row, make up the segments */
if( nreg ){
for(i=1; i<=rlen; i++){
if( rbuf[i] != masks[nmask].region ){
/* if previous was non-zero region, finish it and bump to next */
if( masks[nmask].region ){
masks[nmask].xstop = i - 1;
/* inc the mask count, (extend mask array, if necessary) */
incnmask();
}
masks[nmask].y = y - g->y0 + 1;
masks[nmask].region = rbuf[i];
masks[nmask].xstart = i;
}
}
/* finish last non-zero segment, inc number of mask segs */
if( masks[nmask].region ){
masks[nmask].xstop = (g->x1 - g->x0 + 1);
/* inc the mask count, (extend mask array, if necessary) */
incnmask();
}
/* reset counters for next set of rows */
(void)memset(rbuf, 0, (rlen+1)*sizeof(int));
rptr = rbuf;
nreg = 0;
}
}
/* free buffers */
if( rbuf) free(rbuf);
/* free region information */
if( g ){
for(i=0; i<g->maxshapes; i++){
if( g->shapes[i].scanlist ){
for(j=0; j<=g->y1; j++){
if( g->shapes[i].scanlist[j] ){
for(scan=g->shapes[i].scanlist[j]; scan; ){
tscan = scan->next;
free(scan);
scan = tscan;
}
}
}
free(g->shapes[i].scanlist);
}
if( g->shapes[i].pts ) free(g->shapes[i].pts);
if( g->shapes[i].xv ) free(g->shapes[i].xv);
}
if( g->masks ) free(g->masks);
if( g->shapes ) free(g->shapes);
if( g->ybuf ) free(g->ybuf);
if( g->x0s ) free(g->x0s);
if( g->x1s ) free(g->x1s);
if( g ) free(g);
}
/* return mask info */
*got = nmask;
return masks;
}
int main(int argc, char **argv)
{
int i;
int get, got;
#if DO_FILTER_SWAP
int sgot;
#endif
#if HAVE_MINGW32==0
int pipes[4];
#endif
int txmin, txmax, tymin, tymax, tblock;
char tbuf[SZ_LINE];
char *s=NULL, *t=NULL, *u=NULL;
#if USE_WIN32
HANDLE hStdin, hStdout;
DWORD dwRead, dwWritten;
#endif
/* Launch() sometimes rearranges passed pipes to be stdin/stdout */
#if HAVE_MINGW32==0
if( (s=getenv("LAUNCH_PIPES")) ){
t = (char *)strdup(s);
for(i=0, u=(char *)strtok(t, ","); i<4 && u;
i++, u=(char *)strtok(NULL,",")){
pipes[i] = atoi(u);
}
if( t ) free(t);
if( i < 4 ) return(1);
close(pipes[0]);
close(pipes[3]);
dup2(pipes[2], 0); close(pipes[2]);
dup2(pipes[1], 1); close(pipes[1]);
}
#endif
#if USE_WIN32
hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
hStdin = GetStdHandle(STD_INPUT_HANDLE);
if( (hStdout == INVALID_HANDLE_VALUE) || (hStdin == INVALID_HANDLE_VALUE) ){
unlink(argv[0]);
return 0;
}
#endif
/* process requests for region information for sections of the image */
#ifdef TEST
while( fgets(tbuf, SZ_LINE, stdin) ){
#else
#if USE_WIN32
while((ReadFile(hStdin, &get, sizeof(int), &dwRead, NULL) != FALSE) &&
(dwRead == sizeof(int)) ){
#else
while( read(0, &get, sizeof(int)) == sizeof(int) ){
#endif
#if DO_FILTER_SWAP
switch(sizeof(int)){
case 2:
_sw2((char *)&get,2,NULL,0);
break;
case 4:
_sw4((char *)&get,4,NULL,0);
break;
case 8:
_sw8((char *)&get,8,NULL,0);
break;
}
#endif
#if USE_WIN32
if((ReadFile(hStdin, tbuf, get, &dwRead, NULL)==FALSE) || (dwRead != get))
break;
#else
if(read(0, tbuf, get) != get)
break;
#endif
#endif /* #ifdef TEST */
if(sscanf(tbuf, "%d %d %d %d %d",
&txmin, &txmax, &tymin, &tymax, &tblock)!=5){
break;
}
masks = IMFILTRTN(txmin, txmax, tymin, tymax, tblock, &got);
#ifdef TEST
/* display segments for debugging */
fprintf(stdout, "nmask=%d\n", nmask);
for(i=0; i<nmask; i++){
fprintf(stdout, "region: %d\tx: (%d,%d)\ty: %d\n",
masks[i].region, masks[i].xstart, masks[i].xstop, masks[i].y);
}
fflush(stdout);
#else
/* calculate size of data we will write */
got = got * sizeof(FilterMaskRec);
#if DO_FILTER_SWAP
sgot = got;
switch(sizeof(int)){
case 2:
_sw2((char *)&sgot,2,NULL,0);
break;
case 4:
_sw4((char *)&sgot,4,NULL,0);
break;
case 8:
_sw8((char *)&sgot,8,NULL,0);
break;
}
#if USE_WIN32
WriteFile(hStdout, &sgot, sizeof(int), &dwWritten, NULL);
#else
write(1, &sgot, sizeof(int));
#endif
#else
#if USE_WIN32
WriteFile(hStdout, &got, sizeof(int), &dwWritten, NULL);
#else
write(1, &got, sizeof(int));
#endif
#endif
#if DO_FILTER_SWAP
switch(sizeof(int)){
case 2:
_sw2((char *)masks,got,NULL,0);
break;
case 4:
_sw4((char *)masks,got,NULL,0);
break;
case 8:
_sw8((char *)masks,got,NULL,0);
break;
}
#endif
#if USE_WIN32
WriteFile(hStdout, masks, got, &dwWritten, NULL);
#else
write(1, masks, got);
#endif
#endif
/* free mask records */
if( masks ) free(masks);
}
#ifndef TEST
unlink(argv[0]);
#endif
return 0;
}
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