From 81e22becffcccf98e89a2c7ec5d33c4d12f8e9ed Mon Sep 17 00:00:00 2001 From: Christian Hesse Date: Tue, 4 Jun 2013 18:47:44 +0200 Subject: add comments abount defines --- cqrlogo.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'cqrlogo.c') diff --git a/cqrlogo.c b/cqrlogo.c index f1ef1ae..5ed5a4c 100644 --- a/cqrlogo.c +++ b/cqrlogo.c @@ -13,7 +13,14 @@ #include #include +/* pixels are scaled up by this factor */ #define QRCODE_SCALE 2 +/* error correction level used for QR code + * possible values: QR_ECLEVEL_L (lowest, about 7% error can be corrected) + * QR_ECLEVEL_M (about 15%) + * QR_ECLEVEL_Q (about 25%) + * QR_ECLEVEL_H (highest, about 30%) + * image size raises with higher levels */ #define QRCODE_LEVEL QR_ECLEVEL_L GdkPixbuf * encode_qrcode (char *text) { -- cgit v1.2.3-54-g00ecf