Bitmapped Objects Change Colors/Not Clear Whe

DocumentID: 611266
Revision Date: 29-Feb-96 1:34:41 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Symptoms: Bitmapped objects are changing colors when brought into WordPerfect 5.1 for DOS and WordPerfect 5.0 for DOS and OS/2. The images are using a non-VGA 16- color palette. Solutions: When a file containing its own color palette is imported, WP 5.0/5.1 for DOS, DrawPerfect 1.1, WordPerfect 5.2 for Windows, and WP 5.0 for OS/2 will change to that specific color palette. However, in the WordPerfect programs, there are some colors which are considered protected and will not change. These colors are generally the colors that are being used for the Foreground, Background, and Bold colors and Black. In WordPerfect 6.0 for DOS and Presentations 2.0 for DOS, the color palette does not change. These programs will dither colors within the program to match the colors within the figure so there is no apparent color change. Another customer found that PCX images do not display as crisp and clear as they did in WP 5.1 for DOS or WP 5.2 for OS/2 and Windows. This happens with 640X480 256 colors in all applications (Windows, OS/2 and WP 6.0 for DOS). Selecting higher resolutions in WP 6.0 for DOS displays the image clearer but not as clear as Windows using 640X480 resolution. This problem results because WP 6.0 for DOS now dithers bitmapped images. This is done so images will retain their custom color pallet. With WPWin 5.2, if you have two bitmapped images on the screen, the screen will use the last opened bitmapped color pallet. This means the first bitmapped image that was opened with loose it's custom color pallet. It is best to dither the image and keep all custom color pallets versus loosing the color pallets of all images, except the last opened image. Customers can improve the bitmapped image by increasing the amount of colors in the display driver. Dithering would almost be undetected when using a 16.8 million color graphics driver.

Answer:

Details:

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