RLE (Run-Length-Encoding) Compression Routine in MFC for 256-Color Bitmaps

Environment: VC6, MFC

This is a RLE compression routine, written in MFC. I wrote this because I cannot find handy code for such a thing.

RLE compression is useful when saving a SIMPLE Windows bitmap. My implementation is rather stupid and not optimized. Therefore, if the source bitmap is complex (like the one in the demo app window shown below), you could even get a bigger bitmap file after compression.

Click here for a larger image.

The compression routine is wrapped in an MFC bitmap control class, CDVDBitmapControl, which you can put conveniently in a dialog. The usage is easy:

  1. Add a static control (say, IDC_STATIC_BITMAP) in the dialog for the bitmap control.
  2. Add an #include "DVDBitmapControl.h" in the header file of your dialog.
  3. Add a member variable (say, m_bmp) of type "CDVDBitmapControl" in your dialog class.
  4. In OnInitDialog(), add this line:
    m_bmp.SubclassDlgItem( IDC_STATIC_BITMAP, this).
  5. Call m_bmp.LoadBitmapFile(CString) to load a bitmap into the control.
  6. Call m_bmp.SaveBitmapFile(CString) to save a bitmap into an 8-bit RLE bitmap.

If you need only the compression code, you can just extract the CDVDBitmapControl::CompressInRLE8() and CDVDBitmapControl::EndOfLine() routines from "DVDBitmapControl.cpp". It is quite straightforward to use them.

I did not write the decompression part because the Windows API LoadImage() already does it.

PS: in the demo app, if the loaded bitmap is not in 256 colors, [Save] will not work.


Download demo project - 20 Kb
Download source - 5 Kb


  • 24 bit bmp

    Posted by sam on 04/16/2015 08:42pm


Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Moving from an on-premises environment to Office 365 does not remove the need to plan for disruptions or reduce the business risk requirements for protecting email services. If anything, some risks increase with a move to the cloud. Read how to ease the transition every business faces if considering or already migrating to cloud email. This white paper discusses: Setting expectations when migrating to Office 365 Understanding the implications of relying solely on Exchange Online security Necessary archiving …

  • Enterprises are increasingly looking to platform as a service (PaaS) to lower their costs and speed their time to market for new applications. Developing, deploying, and managing applications in the cloud eliminates the time and expense of managing a physical infrastructure to support them. PaaS offerings must deliver additional long-term benefits, such as a lower total cost of ownership (TCO), rapid scalability, and ease of integration, all while providing robust security and availability. This report …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date