taler-mdb

commit cb06503daca4d167c0f45050f69e01e6c69d8e0e
parent 895612309e3a1c33f435a832888f6dae6783c48e
Author: Christian Grothoff <christian@grothoff.org>
Date:   Sat, 16 Nov 2019 11:10:05 +0100

see stuff

Diffstat:
M
src/main.c
 | 
8
++++++--

1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/main.c b/src/main.c
@@ -256,8 +256,12 @@ show_qrcode (const char *uri)
   for (unsigned int x = 0; x < qrDisplay.var_info.xres - 2 * xOff; x++)
     for (unsigned int y = 0; y < qrDisplay.var_info.yres - 2 * yOff; y++)
     {
-      unsigned int off =
-        (x * nwidth / size) + (y * nwidth / size) * qrc->width;
+      unsigned int xoff = x * nwidth / size;
+      unsigned int yoff = y * nwidth / size;
+      unsigned int off = xoff + yoff * qrc->width;
+      if ( (xoff >= qrc->width) ||
+           (yoff >= qrc->width) )
+        continue;
       qrDisplay.memory[(y + yOff) * qrDisplay.var_info.xres + (x + xOff)] =
         (0 == (qrc->data[off] & 1)) ? 0xFFFF : 0x0000;
     }