/*
- */
+ * Core OCR algorithm (first exact bitmap match)
+ */
+/*
+ * This is part of ypp-sc-tools, a set of third-party tools for assisting
+ * players of Yohoho Puzzle Pirates.
+ *
+ * Copyright (C) 2009 Ian Jackson <ijackson@chiark.greenend.org.uk>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Yohoho and Puzzle Pirates are probably trademarks of Three Rings and
+ * are used without permission. This program is not endorsed or
+ * sponsored by Three Rings.
+ */
#include "ocr.h"
struct DatabaseNode *then;
} DatabaseLink;
-#define MAXGLYPHCHRS 3
+#define MAXGLYPHCHRS 7
typedef struct DatabaseNode {
char s[MAXGLYPHCHRS+1]; /* null-terminated; "" means no match here */
int nlinks, alinks;
+ unsigned endsword:1;
DatabaseLink *links;
} DatabaseNode;
"Upper",
"Digit"
};
+struct OcrCellTypeInfo {
+ /* bitmaps of indices into context_names: */
+ unsigned initial, nextword, midword;
+ int space_spaces;
+ const char *name;
+};
+const struct OcrCellTypeInfo ocr_celltype_number= {
+ 4,4,4,
+ .space_spaces= 5,
+ .name= "number"
+};
+const struct OcrCellTypeInfo ocr_celltype_text= {
+ .initial=2, /* Uppercase */
+ .nextword=3, /* Either */
+ .midword=1, /* Lower only */
+ .space_spaces= 4,
+ .name= "text"
+};
+
#define NCONTEXTS (sizeof(context_names)/sizeof(context_names[0]))
static pid_t resolver_pid;
static int resolver_done;
+DEBUG_DEFINE_DEBUGF(ocr)
+
+#define dbassert(x) \
+ ((x) ? (void)0 : \
+ fatal("Error in character set database.\n" \
+ " Requirement not met: %s:%d: %s", __FILE__,__LINE__, #x))
+
static void fgetsline(FILE *f, char *lbuf, size_t lbufsz) {
+ errno=0;
char *s= fgets(lbuf,lbufsz,f);
- eassert(s);
+ sysassert(!ferror(f));
+ dbassert(!feof(f));
+ assert(s);
int l= strlen(lbuf);
- eassert(l>0); eassert(lbuf[--l]='\n');
+ dbassert(l>0); dbassert(lbuf[--l]='\n');
lbuf[l]= 0;
}
#define FGETSLINE(f,buf) (fgetsline(f,buf,sizeof(buf)))
char chrs[MAXGLYPHCHRS+1];
Pixcol cv;
int r,j,ctxi;
- int h;
+ int h, endsword;
char lbuf[100];
FILE *db;
+ for (ctxi=0; ctxi<NCONTEXTS; ctxi++)
+ cleardb_node(&rd->contexts[ctxi]);
+
char *dbfname=0;
asprintf(&dbfname,"%s/charset-%d.txt",get_vardir(),rd->h);
- eassert(dbfname);
+ sysassert(dbfname);
- db= fopen(dbfname,"r"); eassert(db);
+ db= fopen(dbfname,"r");
free(dbfname);
+ if (!db) {
+ sysassert(errno==ENOENT);
+ return;
+ }
FGETSLINE(db,lbuf);
- eassert(!strcmp(lbuf,"# ypp-sc-tools pctb font v1"));
+ dbassert(!strcmp(lbuf,"# ypp-sc-tools pctb font v1"));
r= fscanf(db, "%d", &h);
- eassert(r==1);
- eassert(h==rd->h);
-
- for (ctxi=0; ctxi<NCONTEXTS; ctxi++)
- cleardb_node(&rd->contexts[ctxi]);
+ dbassert(r==1);
+ dbassert(h==rd->h);
for (;;) {
FGETSLINE(db,lbuf);
found_ctx:
for (nchrs=0;;) {
- int c= fgetc(db); eassert(c!=EOF);
- if (c=='\n') { eassert(nchrs); break; }
- eassert(nchrs<MAXGLYPHCHRS);
+ int c= fgetc(db); sysassert(!ferror(db)); dbassert(c!=EOF);
+ if (c=='\n') { dbassert(nchrs); break; }
+ dbassert(nchrs<MAXGLYPHCHRS);
if (c=='\\') {
unsigned cr;
- c= fgetc(db); eassert(c=='x');
- r= fscanf(db, "%2x", &cr); eassert(r==1);
+ c= fgetc(db); sysassert(!ferror(db)); dbassert(c=='x');
+ r= fscanf(db, "%2x", &cr); sysassert(!ferror(db)); dbassert(r==1);
assert(cr>0 && cr<=255);
c= cr;
}
chrs[nchrs++]= c;
}
+ endsword= 0;
+ if (nchrs>1 && chrs[nchrs-1]==' ') {
+ endsword= 1;
+ nchrs--;
+ }
chrs[nchrs]= 0;
current= &rd->contexts[ctxi];
for (;;) {
FGETSLINE(db,lbuf);
- if (!lbuf[0]) { eassert(current != &rd->contexts[ctxi]); break; }
+ if (!lbuf[0]) { dbassert(current != &rd->contexts[ctxi]); break; }
char *ep;
- cv= strtoul(lbuf,&ep,16); eassert(!*ep);
- eassert(!(cv & ~((1UL << rd->h)-1)));
+ cv= strtoul(lbuf,&ep,16); dbassert(!*ep);
+ dbassert(!(cv & ~((1UL << rd->h)-1)));
for (j=0; j<current->nlinks; j++)
if (current->links[j].col == cv) {
goto found_link;
}
- additional= malloc(sizeof(*additional)); eassert(additional);
+ additional= mmalloc(sizeof(*additional));
additional->s[0]= 0;
additional->nlinks= additional->alinks= 0;
additional->links= 0;
if (current->nlinks==current->alinks) {
current->alinks++;
current->alinks<<=1;
- current->links= realloc(current->links,
- sizeof(*current->links) * current->alinks);
- eassert(current->links);
+ current->links= mrealloc(current->links,
+ sizeof(*current->links) * current->alinks);
}
current->links[current->nlinks].col= cv;
current->links[current->nlinks].then= additional;
found_link:;
}
- eassert(!current->s[0]);
+ dbassert(!current->s[0]);
strcpy(current->s, chrs);
+ current->endsword= endsword;
}
- eassert(!ferror(db));
- eassert(!fclose(db));
+ sysassert(!ferror(db));
+ sysassert(!fclose(db));
}
static void cu_pr_ctxmap(unsigned ctxmap) {
static void callout_unknown(OcrReader *rd, int w, Pixcol cols[],
int unk_l, int unk_r, unsigned unk_ctxmap) {
- int jobpipe[2],donepipe[2], c, r,i, x,y;
+ int jobpipe[2],donepipe[2], c,i, x,y;
const OcrResultGlyph *s;
const char *p;
char cb;
Pixcol pv;
if (!resolver) {
- r= pipe(jobpipe); eassert(!r);
- r= pipe(donepipe); eassert(!r);
+ sysassert(! pipe(jobpipe) );
+ sysassert(! pipe(donepipe) );
resolver_pid= fork();
- eassert(resolver_pid!=-1);
+ sysassert(resolver_pid!=-1);
if (!resolver_pid) {
- r= dup2(jobpipe[0],0); eassert(r==0);
- r= close(jobpipe[1]); eassert(!r);
- r= close(donepipe[0]); eassert(!r);
+ sysassert( dup2(jobpipe[0],0) ==0 );
+ sysassert(! close(jobpipe[1]) );
+ sysassert(! close(donepipe[0]) );
/* we know donepipe[1] is >= 4 and we have dealt with all the others
* so we aren't in any danger of overwriting some other fd 4: */
- r= dup2(donepipe[1],4); eassert(r==4);
- execlp("./show-thing.tcl", "./show-thing.tcl",
- "--automatic","1",(char*)0);
- eassert(!"execlp failed");
+ sysassert( dup2(donepipe[1],4) ==4 );
+ execlp("./yppsc-ocr-resolver", "yppsc-ocr-resolver",
+ DEBUGP(callout) ? "--debug" : "--noop-arg",
+ "--automatic-1",
+ (char*)0);
+ sysassert(!"execlp ocr-resolver failed");
}
- r= close(jobpipe[0]); eassert(!r);
- r= close(donepipe[1]); eassert(!r);
- resolver= fdopen(jobpipe[1],"w"); eassert(resolver);
+ sysassert(! close(jobpipe[0]) );
+ sysassert(! close(donepipe[1]) );
+ resolver= fdopen(jobpipe[1],"w"); sysassert(resolver);
resolver_done= donepipe[0];
}
fprintf(resolver,"%d %d ",unk_l,unk_r);
fputs("\",\n",resolver);
}
fputs("};\n",resolver);
- eassert(!ferror(resolver));
- eassert(!fflush(resolver));
+ sysassert(!ferror(resolver));
+ sysassert(!fflush(resolver));
- eassert(resolver);
+ sysassert(resolver);
+ int r;
for (;;) {
r= read(resolver_done,&cb,1);
- if (r==-1) { eassert(errno==EINTR); continue; }
+ if (r==-1) { sysassert(errno==EINTR); continue; }
break;
}
if (r==0) {
- pid_t pid;
- for (;;) {
- pid= waitpid(resolver_pid, &r, 0);
- if (pid==-1) { eassert(errno==EINTR); continue; }
- break;
- }
- eassert(pid==resolver_pid);
- if (WIFEXITED(r)) {
- eassert(!WEXITSTATUS(r));
- fclose(resolver);
- close(resolver_done);
- resolver= 0;
- } else if (WIFSIGNALED(r)) {
- eassert(!"resolver child died due to signal");
- } else {
- eassert(!"weird wait status");
- }
+ waitpid_check_exitstatus(resolver_pid, "character resolver");
+ fclose(resolver);
+ close(resolver_done);
+ resolver= 0;
} else {
- eassert(r==1);
- eassert(cb==0);
+ assert(r==1);
+ sysassert(cb==0);
}
readdb(rd);
unsigned ctxmap) {
if (rd->nresults >= rd->aresults) {
rd->aresults++; rd->aresults<<=1;
- rd->results= realloc(rd->results,sizeof(*rd->results)*rd->aresults);
- eassert(rd->results);
+ rd->results= mrealloc(rd->results, sizeof(*rd->results)*rd->aresults);
}
rd->results[rd->nresults].s= s;
rd->results[rd->nresults].l= l;
rd->nresults++;
}
-struct OcrCellTypeInfo {
- unsigned initial, nextword, midword;
-};
-const struct OcrCellTypeInfo ocr_celltype_number= {
- 4,4,4
-};
-const struct OcrCellTypeInfo ocr_celltype_text= {
- .initial=2 /* Uppercase */,
- .nextword=3 /* Either */,
- .midword=1 /* Lower only */
-};
+
+const char *ocr_celltype_name(OcrCellType ct) { return ct->name; }
OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
int nspaces;
nspaces=- w;
ctxmap= ct->initial;
rd->nresults=0;
- fprintf(debug,"OCR h=%d w=%d",rd->h,w);
- for (x=0; x<w; x++) fprintf(debug," %"PSPIXCOL(PRIx),cols[x]);
- fprintf(debug,"\n");
+ debugf("OCR h=%d w=%d",rd->h,w);
+ for (x=0; x<w; x++) debugf(" %"PSPIXCOL(PRIx),cols[x]);
+ debugf("\n");
debug_flush();
x=0;
if (!cols[x]) {
nspaces++;
x++;
- if (nspaces==3) {
- fprintf(debug,"OCR x=%x nspaces=%d space\n",x,nspaces);
- add_result(rd," ",x-nspaces,x+1,0);
+ if (nspaces == ct->space_spaces) {
+ debugf("OCR x=%x nspaces=%d space\n",x,nspaces);
ctxmap= ct->nextword;
}
continue;
}
+
+ /* something here, so we need to add the spaces */
+ if (nspaces >= ct->space_spaces)
+ add_result(rd," ",x-nspaces,x+1,0);
nspaces=0;
/* find character */
DatabaseNode *uniquematch= 0;
int uniquematch_rx=-1;
- fprintf(debug,"OCR lx=%d ctxmap=%x ",lx,ctxmap);
+ debugf("OCR lx=%d ctxmap=%x ",lx,ctxmap);
for (ctxi=0; ctxi<NCONTEXTS; ctxi++) {
DatabaseNode *current= &rd->contexts[ctxi];;
x= lx;
if (!(ctxmap & (1u << ctxi))) continue;
- fprintf(debug," || %s",context_names[ctxi]);
+ debugf(" || %s",context_names[ctxi]);
for (;;) {
debug_flush();
- fprintf(debug," | x=%d",x);
+ debugf(" | x=%d",x);
if (x>w) break;
Pixcol cv= cols[x];
- fprintf(debug," cv=%"PSPIXCOL(PRIx),cv);
+ debugf(" cv=%"PSPIXCOL(PRIx),cv);
for (i=0; i<current->nlinks; i++)
if (current->links[i].col == cv)
goto found;
/* not found */
- fprintf(debug," ?");
+ debugf(" ?");
break;
found:
current= current->links[i].then;
if (current->s[0]) {
- fprintf(debug," \"%s\"",current->s);
+ debugf(" \"%s\"%s",current->s,current->endsword?"_":"");
bestmatch= current;
bestmatch_rx= x;
} else {
- fprintf(debug," ...");
+ debugf(" ...");
}
x++;
if (bestmatch) {
if (uniquematch && strcmp(bestmatch->s, uniquematch->s)) {
- fprintf(debug, " ambiguous");
+ debugf( " ambiguous");
uniquematch= 0;
break;
}
}
if (uniquematch) {
- fprintf(debug," || YES\n");
+ debugf(" || YES");
add_result(rd, uniquematch->s, lx, uniquematch_rx, ctxmap);
x= uniquematch_rx+1;
- ctxmap= ct->midword;
+ if (uniquematch->s[0]) ctxmap= ct->midword;
+ else debugf(" (empty)");
+ if (uniquematch->endsword) {
+ nspaces= ct->space_spaces;
+ debugf("_");
+ ctxmap= ct->nextword;
+ }
+ debugf("\n");
} else {
int rx;
- fprintf(debug," || UNKNOWN");
+ debugf(" || UNKNOWN");
for (rx=lx; rx<w && cols[rx]; rx++);
- fprintf(debug," x=%d ctxmap=%x %d..%d\n",x, ctxmap, lx,rx);
+ debugf(" x=%d ctxmap=%x %d..%d\n",x, ctxmap, lx,rx);
debug_flush();
callout_unknown(rd, w,cols, lx,rx-1, ctxmap);
goto restart;
}
}
add_result(rd, 0,-1,-1,0);
- fprintf(debug,"OCR finished %d glyphs\n",rd->nresults);
+ debugf("OCR finished %d glyphs\n",rd->nresults);
debug_flush();
return rd->results;
}
OcrReader *ocr_init(int h) {
OcrReader *rd;
- rd= malloc(sizeof(*rd)); eassert(rd);
+ rd= mmalloc(sizeof(*rd));
memset(rd,0,sizeof(*rd));
rd->h= h;
readdb(rd);