|image create photo ?name? ?options?|
|||Image data in png format (options -data and -file) is detected automatically.|
|||The format name png is recognized by the option -format. In addition the value for the option is treated as list and may contain any of the special options listed in section PNG OPTIONS.|
The handler provides the following options:
The handler provides no true write options at all, but accepts pairs of keys and values when writing a PNG file. Each pair will be written as a named text chunk where the key provides the name of the chunk and the value its contents. For example
-matte bool This option is supported for reading only.
If set to false, a matte (alpha) channel is ignored during reading or writing. Default is true.
-alpha float This option is supported for reading only.
An additional alpha filtering for the overall image, which allows the background on which the image is displayed to show through. This usually also has the effect of desaturating the image. The alphaValue must be between 0.0 and 1.0. Specifying an alpha value, overrides the setting of the matte flag, i.e. reading a file which has no alpha channel (Greyscale, RGB) will add an alpha channel to the image independent of the matte flag setting.
png Author <name> Title <title> Description ...
If you want to write images to disk which contain transparency information (e.g. PNG with alpha channel) you need at least Tk 8.3.
img-bmp, img-dted, img-gif, img-ico, img-intro, img-jpeg, img-pcx, img-pixmap, img-png, img-ppm, img-ps, img-raw, img-sgi, img-sun, img-tga, img-tiff, img-window, img-xbm, img-xpm
image handling, png, tk
Copyright (c) 1995-2009 Jan Nijtmans <email@example.com>