/ 
Tk-804.025_beta8
/ Tk_ImageChanged
Security Advisories (6)
CVE-2006-4484 (2008-10-01)

Buffer overflow in the LWZReadByte_ function in the GD extension in allows remote attackers to have an unknown impact via a GIF file with input_code_size greater than MAX_LWZ_BITS, which triggers an overflow when initializing the table array.

CVE-2007-4769 (2008-01-09)

The regular expression parser in TCL before 8.4.17, as used in PostgreSQL 8.2 before 8.2.6, 8.1 before 8.1.11, 8.0 before 8.0.15, and 7.4 before 7.4.19, allows remote authenticated users to cause a denial of service (backend crash) via an out-of-bounds backref number.

CVE-2003-0107 (2003-03-07)

Buffer overflow in the gzprintf function in zlib 1.1.4, when zlib is compiled without vsnprintf or when long inputs are truncated using vsnprintf, allows attackers to cause a denial of service or possibly execute arbitrary code.

CVE-2007-4772 (2008-01-09)

The regular expression parser in TCL before 8.4.17, as used in PostgreSQL 8.2 before 8.2.6, 8.1 before 8.1.11, 8.0 before 8.0.15, and 7.4 before 7.4.19, allows context-dependent attackers to cause a denial of service (infinite loop) via a crafted regular expression.

CVE-2007-6067 (2008-01-09)

Algorithmic complexity vulnerability in the regular expression parser in TCL before 8.4.17, as used in PostgreSQL 8.2 before 8.2.6, 8.1 before 8.1.11, 8.0 before 8.0.15, and 7.4 before 7.4.19, allows remote authenticated users to cause a denial of service (memory consumption) via a crafted "complex" regular expression with doubly-nested states.

CVE-2017-12652 (2019-07-10)

libpng before 1.6.32 does not properly check the length of chunks against the user limit.

NAME

Tk_ImageChanged - notify widgets that image needs to be redrawn

SYNOPSIS

#include <tk.h>

Tk_ImageChanged(imageMaster, x, y, width, height, imageWidth, imageHeight)

ARGUMENTS

Tk_ImageMaster imageMaster (in)

Token for image, which was passed to image's createProc when the image was created.

int x (in)

X-coordinate of upper-left corner of region that needs redisplay (measured from upper-left corner of image).

int y (in)

Y-coordinate of upper-left corner of region that needs redisplay (measured from upper-left corner of image).

"int" width (in)

Width of region that needs to be redrawn, in pixels.

"int" height (in)

Height of region that needs to be redrawn, in pixels.

"int" imageWidth (in)

Current width of image, in pixels.

"int" imageHeight (in)

Current height of image, in pixels.

DESCRIPTION

An image manager calls Tk_ImageChanged for an image whenever anything happens that requires the image to be redrawn. As a result of calling Tk_ImageChanged, any widgets using the image are notified so that they can redisplay themselves appropriately. The imageMaster argument identifies the image, and x, y, width, and height specify a rectangular region within the image that needs to be redrawn. imageWidth and imageHeight specify the image's (new) size.

An image manager should call Tk_ImageChanged during its createProc to specify the image's initial size and to force redisplay if there are existing instances for the image. If any of the pixel values in the image should change later on, Tk_ImageChanged should be called again with x, y, width, and height values that cover all the pixels that changed. If the size of the image should change, then Tk_ImageChanged must be called to indicate the new size, even if no pixels need to be redisplayed.

SEE ALSO

Tk::CrtImgType

KEYWORDS

images, redisplay, image size changes