A Bitmap Editor

[Darrel]

Updated drawing functions.

[Darrel]

Fixed a problem with opening a bitmap with 256 or fewer colors.

[soulee]

Hello,Darrel

I just checked it on my winxp,then I found a good function. :U
I have open a 24-bpp bitmap  save to a 8-bpp or 4-bpp,then I find the bitmap display effect is very good.

How are you make it? :dazzled:

Regards,

Soulee

[Darrel]

Hello soulee,

I believe it's called an octree. Anyway you sum all the seperate RGB components and divide by the total number of pixels to get an average RGB for the entire bitmap. Then do a sum of differences squared of the seperate RGB components and the average RGB components. Take the greatest of these 3 sums and find the most balanced value of this component where approxiamtely half of them are below and half above. Then repeat the process for 2 average colors and their sums of differences squared. Then choose the greatest of the 2 sums of sums of differences squared and take the greatest of its 3 component sums of differences squared and find the most balanced value of this component where approxiamtely half of them are below and half above. Then repeat as necessary until you have the number of colors you want in your bitmap. Then use Floyd-Steinberg dithering to get the resultant color reduced bitmap.

Hope that answers your question.

Regards,

Darrel

[soulee]

Hello Darrel,


octree?  :red
Can you post interrelated masm or c code?

Regards,

soulee

[Darrel]

Sorry, I have no code available for public consumption.

Regards,

Darrel

[soulee]

Darrel,

I found a problem,
when it run at 256 colors,open image don't use color palette.

soulee

[Darrel]

soulee,

I can't duplicate your problem. When I open an 8 bpp bitmap it opens at 8 bpp and when I open a true color bitmap it opens at 24 bpp.

Regards,

Darrel

[Darrel]

Added a Sharpen filter.  Added some support for OpenGL (under Options). The 3D Block works with 6 picture files the order when opening them is Front-Back-Left-Right-Top-Bottom. The height and width of the block is determined by the front picture. The depth of the block is determined by the left picture. Haven't figured out yet how to take more advantage of OpenGL, oh well it's a start.

Also fixed some display problems associated with covering and uncovering ABitmapEditor's main window in particular if you have a  selected bitmap over the main bitmap.

Regards,

Darrel   :8)

[PBrennick]

Darrel,
What do I think about your Bitmap Editor? I love it!
What do I think about your flag? I hate it! It is difficult to read your posts, my eyes keep wandering to it.

Paul

[Darrel]

What do I think about your flag? I hate it! It is difficult to read your posts, my eyes keep wandering to it.

Paul,

I'll probably change back to Laurel-n-Hardy before too long. I was just showing what could be made with the 3D Flag routine. I kinda like the flag tho'.   :bg

Regards,

Darrel

[Darrel]

Added support for drawing arcs and pies and using antialiasing. Thanks ramguru

Regards,

Darrel

[ramguru]

This is nice indeed  :U
I have further suggestions  :dance:
1) How about 32bit color support (this is a must for ico format)
  a) if editor had 32bit support, object pack like in axialis icon editor would be amazing feature (I'm sure it's not difficult to implement)
2) How about optional grid (when creating ico, cur this would be useful)

Thanks for new version

[Darrel]

Added a grid option for zoom level 800%. Also added Blend function.

Regards,

Darrel

[ramguru]

Thanks for new features,
however, grid should consist of one pixel width lines (not two), and using some less eye-stressful color like gray :)