Changeset ba733e83 in mainline for uspace/lib/c/include/io/pixelmap.h

Timestamp:

2012-11-23T10:08:02Z (12 years ago)

Author:

Petr Koupy <petr.koupy@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

563573b

Parents:

7dba813

Message:

Improved safety of the optimized pixel transfers.

File:

• uspace/lib/c/include/io/pixelmap.h (modified) (1 diff)

uspace/lib/c/include/io/pixelmap.h

@@ -52 +52 @@
     sysarg_t y)
 {
-        size_t offset = y * pixelmap->width + x;
-        pixel_t *pixel = pixelmap->data + offset;
-        return pixel;
+        if (x < pixelmap->width && y < pixelmap->height) {
+                size_t offset = y * pixelmap->width + x;
+                pixel_t *pixel = pixelmap->data + offset;
+                return pixel;
+        } else {
+                return NULL;
+        }
 }