/ 
Tk-804.032_500
/ Tk_ImageChanged
Security Advisories (6)
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-2018-25032 (2022-03-25)

zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.

CVE-2011-3045 (2012-03-22)

Integer signedness error in the png_inflate function in pngrutil.c in libpng before 1.4.10beta01, as used in Google Chrome before 17.0.963.83 and other products, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted PNG file, a different vulnerability than CVE-2011-3026.

CVE-2016-10087 (2017-01-30)

The png_set_text_2 function in libpng 0.71 before 1.0.67, 1.2.x before 1.2.57, 1.4.x before 1.4.20, 1.5.x before 1.5.28, and 1.6.x before 1.6.27 allows context-dependent attackers to cause a NULL pointer dereference vectors involving loading a text chunk into a png structure, removing the text, and then adding another text chunk to the structure.

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.

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