+ str->close();
+ fclose(f);
+
+ // dump PBM file
+ } else if (colorMap->getNumPixelComps() == 1 &&
+ colorMap->getBits() == 1) {
+
+ // open the image file and write the PBM header
+ sprintf(fileName, "%s-%03d.pbm", fileRoot, imgNum);
+ ++imgNum;
+ if (!(f = fopen(fileName, "wb"))) {
+ error(-1, "Couldn't open image file '%s'", fileName);
+ return;
+ }
+ fprintf(f, "P4\n");
+ fprintf(f, "%d %d\n", width, height);
+
+ // initialize stream
+ str->reset();
+
+ // copy the stream
+ size = height * ((width + 7) / 8);
+ for (i = 0; i < size; ++i) {
+ fputc(str->getChar() ^ 0xff, f);
+ }
+
+ str->close();