Working With Palettes and Colors
144
TPDesign4 Touch Panel Design Program
colorizable regions that could be changed to suit different design needs. That is, while virtually any
PNG file could be applied as a chameleon image, some images make more sense and would give
better results than others.
The characteristics that define any image as a chameleon image are:
1. It meets the technical requirements for a chameleon image.
2. It has been applied to a button as the Chameleon Image (via the Chameleon Image state
property).
Working With Chameleon Images
Chameleon Images utilize the 4 color channels (Red, Blue, Green and Alpha) that comprise 32-bit
images to define separate colorizable regions.
 Only PNG image files can be used as chameleon images, since in TPDesign4, only PNGs
accommodate transparency as a color.
 For the transparent color to be interpreted correctly by TPDesign4, the PNG file must be
saved with RGB colors (32-bit).
Here's an example of creating a simple chameleon image, for the purpose of illustrating the basic
concepts used:
1. Using an image editing program to create an image to use as the chameleon image:
Use the alpha channel to define the overall desired shape of the button (see Working with
Transparent Backgrounds for more information).
FIG. 32 Working With Chameleon Images
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