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Re: Question about using palettes with images and shader in object graphics [message #83273 is a reply to message #83272]

Tue, 12 February 2013 12:05

M. Katz
Messages: 69
Registered: May 2005

Member

Here I'll answer my own question definitively from the IDL Help on IDLgrImage (See the last line):

PALETTE
An object reference to a palette object (an instance of the IDLgrPalette object class) that specifies the red, green, and blue values of the color lookup table to be associated with the image if it is an indexed color image. This property is ignored if the image is a greyscale or RGB image.

Note: This table is only used when the destination is an RGB model device. The Indexed color model writes the indices directly to the device. In order to ensure that these colors are used when the image is displayed, this palette must be copied to the graphics destination’s palette for any graphics destination that uses the Indexed color model.

Note: If a SHADER is associated with the image object, the palette is ignored.

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[Message index]

		Re: Question about using palettes with images and shader in object graphics By: David Fanning on Tue, 12 February 2013 12:13
		Re: Question about using palettes with images and shader in object graphics By: M. Katz on Tue, 12 February 2013 12:05
		Re: Question about using palettes with images and shader in object graphics By: David Fanning on Tue, 12 February 2013 10:32

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