INFO: UNIDRV/UNITOOL-Supported Color Models (169600)
The information in this article applies to:
- Microsoft Windows 95 Driver Development Kit (DDK)
- Microsoft Windows 98 Driver Development Kit (DDK)
- Microsoft Windows ME Driver Development Kit (DDK)
This article was previously published under Q169600 SUMMARY
UNIDRV/UNITOOL supports a number of color models that can be used by
printer minidriver developers.
MORE INFORMATION
UNIDRV/UNITOOL supports two different type of color models: planar and
pixel.
Until recently, most color printers used planar models to represent color
images. The planar model support is provided by DMCOLOR.DLL which
UNIDRV/UNITOOL communicates with to render planar printer output.
DMCOLOR.DLL supports only RGB planar format (UNIDRV's color bitmap buffer
is three planes; Red, Green, and Blue, each with one bit-per-pixel).
In order to support the pixel model, you must provide an fnOEMDump callback
function in your minidriver. UNIDRV can render images into a 4, 8, 16, 24,
or 32 bits-per-pixel DIB format bitmap buffer and then pass the buffer to
the callback function. The callback function sends the pixel color data to
the printer. The Win95 DIB engine (DIBENG.DLL) is responsible for rendering
the printer data into a pixel format.
| Modification Type: | Minor | Last Reviewed: | 5/24/2004 |
|---|
| Keywords: | kbinfo kbprint KB169600 |
|---|
|