Displaying 2 results from an estimated 2 matches for "bitopts".
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bitops
2005 May 28
4
bitopts functions overflowing page boundarys
u.inuse.type_info is at the end of the pfn_info structure, and is
u32 for both x86_32 and x86_64--in this location it can also be the
last 32 bits of a page.
several functions use bitopts.h functions to manipulate this member, and
on x86_64 these functions use u64 instructions, which will overflow the
page boundary, and possibly the end of memory as we see here:
(XEN) &page->u.inuse.type_info = 0xffff828402fffffc
(XEN) CPU: 0
(XEN) EIP: e010:[<ffff830000129...
2009 Jun 15
1
display SVG, PNG, GIF, JPEG, TIFF, PPM in new plot frame
...age = "rimage")
jpeg <- read.jpeg(j)
plot(jpeg)
# GIF
# ---------------------------------
# package 'caTools' provides a number of utility
# functions, including calls for reading and
# writing GIF files -- this package depends on
# package 'bitopts' (but contains no system
# requirements)
#
# note that image() needs 'flip' = TRUE and 'asp'
# sets the aspect ratio to unity
library(caTools)
gif <- read.gif("my.gif", verbose = TRUE, flip = TRUE)
image(gif$image, col = gif$col, main =...