new file mode 100644
--- /dev/null
+++ b/window/runlengh.cc
@@ -0,0 +1,47 @@
+#include<stdio.h>
+
+int main(int argc, char** argv) {
+	if (argc != 2) return 0;
+	FILE* f = fopen(argv[1],"rb");
+	if (f==0) return 0;
+	int i,j;
+	fseek(f,0,2);
+	int sz=ftell(f);
+	fseek(f,0,0);
+	char* buf=new char[sz];
+	char* out = new char[sz];
+	fread(buf,sz,1,f);
+	fclose(f);
+	int oc=0;
+	for (i=0; i<sz; i++) {
+		int d = buf[i];
+		int c = d & 0xff;
+		switch(c) {
+		case 0x61: c=1; break;
+		case 0xa2: c=2; break;
+		case 0xc1: c=3; break;
+		case 0xdf: c=4; break;
+		case 0xde: c=5; break;
+		case 0xff: c=6; break;
+		}
+		for (j=i; j<sz; j++)
+			if (buf[j] != d) break;
+		int cnt = j-i;
+		if (cnt < 16) {
+			out[oc++] = c | 0x08 | (cnt<<4);
+		} else if (cnt < 256){
+			out[oc++] = c;
+			out[oc++] = cnt;
+		} else fprintf(stderr,"cnt %d\n",cnt);
+		if (j == sz) break;
+		i = j-1;
+	}
+	printf("int button1_cnt = %d;\nchar button1[%d] = {\n\t",oc,oc+1);
+	for (i=0; i<oc; i++) {
+		printf("0x%02x,",int(out[i])&0xff);
+		if ( (i&15) == 15) printf("\n\t");
+	}
+	printf("\n\t0xff};\n");
+	return 0;
+}
+/* 2834bytes*/