Bitmap Manipulation Techniques

• Microsoft Windows Software Development Kit (SDK) 3.1

SUMMARY

The Windows versions 3.0 and 3.1 bitmap-manipulation Application Programming Interface (API) (BitBlt(), StretchBlt(), StretchDIBits(), and so forth) contains a powerful complement of Raster Operations (ROP) that allow for complicated handling of bitmaps. These raster-operation codes can be used, for example, to change an entire color in a bitmap without affecting the other colors.

The BMUTIL sample in the Microsoft Software Library demonstrates the following bitmap manipulation techniques:

1. Creating an unavailable or disabled (grayed) bitmap from a color bitmap using various ROP codes and the BitBlt() function.



2. Changing a single color in a bitmap without affecting any other colors. This is implemented completely using BitBlt() with various ROP codes.



3. Swapping two colors in a bitmap without affecting any other colors. This is also implemented with BitBlt() and ROP codes.



4. Dithering a color bitmap to a monochrome bitmap. This is done by manipulating the bits of a Device-Independent Bitmap (DIB) directly.

MORE INFORMATION

The following files are available for download from the Microsoft Download Center. Click the file names below to download the files:


Bmutil.exe

For more information about how to download files from the Microsoft Download Center, please visit the Download Center at the following Web address

http://www.microsoft.com/downloads/search.asp

Additional query words:

Keywords : kbfile kbprg kbsample kbWinOS310 kbDSupport kbSDKWin16
Version : WINDOWS:3.1
Platform : WINDOWS
Issue type : kbinfo