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- cedit - edit colors on the screen
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- The frame buffer of the IRIS contains values which are translated into
- RGB values by a color map for applications in color map mode. _C_e_d_i_t
- changes the mapping of any color index. Three sliders are displayed,
- along with a sample patch of the color being edited. Normal operation is
- to establish input focus by placing the cursor within the _c_e_d_i_t window
- then press and hold the Alt key down. While continuing to hold the Alt
- key down move the cursor outside of the _c_e_d_i_t window and click the left
- button to pick up a color index to be edited. The sliders indicate the
- red, green, and blue components of the current color. Once the color map
- index has been picked, release the Alt key and return to the _c_e_d_i_t win-
- dow. The color can then be changed by clicking down on a slider in
- _c_e_d_i_t, and adjusting the position of the control. Under each slider con-
- trol is a number representing the current value of that color component.
- The number ranges from 0 (for least intensity) to 255 (for most intensi-
- ty). Under the color patch is a number that represents the current color
- index. The user can toggle between decimal and hexidecimal representa-
- tions of the current RGB values being displayed via the menu item "toggle
- numbers".
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- showmap(6D)
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- It is not possible for _c_e_d_i_t to know if the window you are selecting a
- color from is single or double buffered. This can be a problem on
- machines that have only 8 bitplanes. _c_e_d_i_t can be made to interpret data
- as single or double buffered via the last item in the menu. This menu
- will toggle between choices. The menu shows up on 8 bit machines only,
- since it is not a problem on other machines.
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- If another process changes the color entry being edited, the sliders of
- _c_e_d_i_t do not indicate the correct positions for that color index.
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- This program must have input focus in order to work properly. See the
- window manager documentation for a discussion of input focus.
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- _c_e_d_i_t only knows about the frontbuffer. If the queried pixel belongs to a
- double buffered window, it is possible for _c_e_d_i_t to grab from the wrong
- buffer. When the window swaps buffers, _c_e_d_i_t will be able to grab the
- correct color.
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- Some applications use dithered colors so the index and color of adjacent
- pixels will be different for some regions of the screen.
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- Systems with multiple color maps are confusing. _C_e_d_i_t can only edit the
- color map currently installed in the hardware colormap. Applications
- with their own color maps cannot be edited unless their colormap is
- currently installed.
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