gr-utils: add png2rle

gr-utils/Makefile

@@ -2,21 +2,36 @@ include ../Makefile.inc
 
 CFLAGS = -g -Wall -O2
 
-all:	png2gr
+all:	png2gr png2rle
+
+
+###
 
 loadpng.o:	loadpng.c loadpng.h
 	$(CC) $(CFLAGS) -c loadpng.c
 
+
+###
+
 png2gr:		png2gr.o loadpng.o
 	$(CC) $(LFLAGS) -lpng -o png2gr png2gr.o loadpng.o
 
 png2gr.o:		png2gr.c loadpng.h
 	$(CC) $(CFLAGS) -c png2gr.c
 
+###
+
+png2rle:		png2rle.o loadpng.o
+	$(CC) $(LFLAGS) -lpng -o png2rle png2rle.o loadpng.o
+
+png2rle.o:		png2rle.c loadpng.h
+	$(CC) $(CFLAGS) -c png2rle.c
+
+###
 
 install:	
-		cp png2gr $(INSTALL_LOC)
+		cp png2gr png2rle $(INSTALL_LOC)
 
 clean:		
-		rm -f *~ *.o png2gr
+		rm -f *~ *.o png2gr png2rle
 

gr-utils/png2rle.c

@@ -0,0 +1,74 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "loadpng.h"
+
+/* Converts a PNG to RLE compressed data */
+
+int main(int argc, char **argv) {
+
+	int enough=0,run=0;
+	int x;
+
+	unsigned char *image;
+	int xsize,ysize,last=-1,next;
+	FILE *outfile;
+
+	if (argc<3) {
+		fprintf(stderr,"Usage:\t%s INFILE OUTFILE\n\n",argv[0]);
+		exit(-1);
+	}
+
+	outfile=fopen(argv[2],"w");
+	if (outfile==NULL) {
+		fprintf(stderr,"Error!  Could not open %s\n",argv[2]);
+		exit(-1);
+	}
+
+	if (loadpng(argv[1],&image,&xsize,&ysize)<0) {
+		fprintf(stderr,"Error loading png!\n");
+		exit(-1);
+	}
+
+	printf("Loaded image %d by %d\n",xsize,ysize);
+
+	x=0;
+	enough=0;
+	fprintf(outfile,"0x%X,0x%x,\n",xsize,ysize);
+	last=image[x] | (image[x+xsize]<<4);
+	run++;
+	x++;
+	while(1) {
+		next=image[x] | (image[x+xsize]<<4);
+
+		if (next!=last) {
+			fprintf(outfile,"0x%02X,0x%02X,\n",run,last);
+			run=0;
+			last=next;
+		}
+
+		run++;
+
+
+		x++;
+		enough++;
+		if (enough>=xsize) {
+			enough=0;
+			x+=xsize;
+			fprintf(outfile," ");
+		}
+
+
+		if (x>xsize*ysize) break;
+	}
+
+	fclose(outfile);
+
+	return 0;
+}