ext/qrscanner/qrscanner.c in qrscanner-0.3.1 vs ext/qrscanner/qrscanner.c in qrscanner-0.4

@@ -2,11 +2,11 @@
 
 //extern "C" {
 
 #include "ruby.h"
 
-char *decode_qr_image(const char *fname);
+char *decode_qr_image(const char *fname, int dpi, int blur);
 
 VALUE QrScanner = Qnil;
 
 void Init_qrscanner();
 
@@ -17,11 +17,19 @@
 	rb_define_singleton_method(QrScanner, "decode", method_decode, 1);
 }
 
 VALUE method_decode(VALUE self, VALUE fn) {
 	VALUE ret;
-	char *str;
-	str = decode_qr_image(StringValuePtr(fn));
+	char *str = NULL;
+	int dpis[] = {0, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 220, 240, 260, 280, 300, 450};
+	int blurs[] = {0, 2, 4, 6, 8, 10, 15, 20, 50};
+	int dpi, blur;
+
+       	for(blur=0; !str && blur<9; blur++) {
+       	 	for(dpi=0; !str && dpi<11; dpi++) {
+       			str = decode_qr_image(StringValuePtr(fn), dpis[dpi], blurs[blur]);
+       		}
+               }
 	if(!str)
 		return Qnil;
 		
 	ret = rb_str_new2(str);
 	free(str);