ps_open_image(3) [debian man page]

PS_OPEN_IMAGE(3)					     Library Functions Manual						  PS_OPEN_IMAGE(3)

NAME

       PS_open_image -- Reads an image for later placement

SYNOPSIS

       #include <pslib.h>

       int  PS_open_image(PSDoc  *psdoc,  char	*type, char *source, char *data, int lenght, int width, int height, int components, int bpc, const
       char *params)

DESCRIPTION

       Reads an image which is already available in memory. The parameter source is currently not evaluated and assumed to be `memory'. The param-
       eter type can be either `raw' or `eps'. Images in raw format are expected to be a stream of pixels starting in the upper left and ending in
       the lower right corner. Each pixel is a tuple of components representing the colors. Each component  consists  of  bpc  bit.  Color  imgags
       expect  the  components to be stored in RGB or CMYK order. The number of components implies the colorspace. 4 components imply a CMYK image
       and not an RGB image with an alpha channel. This restriction may be removed in later versions.

       EPS images are expect as stored in a file. There is no need to set any other paramter. The height und width of the image is taken from  the
       bounding box within the image data.

       Since  version  0.4.5  of  pslib  images  are read by default for later reuse. This means that the image is saved into a so called reusable
       stream object. Later calls of PS_place_image(3)		   will only put a short sequence of postscript code into the output file  replay-
       ing  the  image.   This reduces the overall postscript file size, speeds up its processing by the postscript rip and allows to place images
       into templates. This behaviour can be turned off by setting the parameter `imagereuse' to false with PS_set_parameter(3).

RETURN VALUE

       Returns identifier of the image or zero in case of an error.  The identifier is a positiv number greater 0.

SEE ALSO

       PS_open_image_file(3), PS_place_image(3), PS_close_image(3)

AUTHOR

       This manual page was written by Uwe Steinmann uwe@steinmann.cx.

																  PS_OPEN_IMAGE(3)

Tk_ImageChanged(3)					       Tk Library Procedures						Tk_ImageChanged(3)

__________________________________________________________________________________________________________________________________________________

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 call-
       ing Tk_ImageChanged, any widgets using the image are notified so that they can redisplay themselves appropriately.  The	imageMaster  argu-
       ment  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_CreateImageType

KEYWORDS

       images, redisplay, image size changes

Tk									4.0							Tk_ImageChanged(3)