Define a bitmap inside the code
lazarus / 39-Graphics

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Giuseppe Ridinò · 2004-04-26 20:50

I've got a problem and I hope you can give me a solution (I know that
this problem may sound trivial,... but it ain't to me)  :oops: :

How can I define a simple image without loading it from a file?

 :arrow: For example:
1. I have a tile image, sized MxN
2. Each tile is taken from a small set of bitmaps, (let's say 1..Nt)
3. When my image should change I will copy the appropiate bitmap to
the changed set.

 :!: The point is that I don't want to load the bitmaps from a file,
but I want to define them in the code, as a constant or in other way,
something like:
BitMap1: array[1..8,1..8] = (....);

Any suggestion?

Thanks in advance

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Giuseppe Ridinò · 2004-05-22 14:42

Please help me!
I tryed the following:
const
  Data: array[0..7,0..7] of LongWord = (
    ($0000FF, $0000FF,..... ),
    .....
  )
In this way I define the 8x8 icon with the needed Tcolors.

Then I tryed:
Icon:=TBitmap.Create;
Icon.ReleaseHandle;
Icon.Handle:=CreateBitMap(8,8,1,1,@Data);

The application is compiled and runs, but when I try to copy this Icon
using
Image.Picture.Bitmap.Canvas.CopyRect
I get wrong (... I mean unexpected for me) results.
What's wrong?
Thanks in advance for any help!

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Marc · 2004-05-25 10:45

Can you use a Imagelist ?

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RudieD · 2006-04-26 12:40

Last time I tried the ImageList, I could not replace the Bitmaps
during runtime. I'll try it over the weekend again. If you don't want
to change them during runtime, it works fine.

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Giuseppe Ridinò · 2006-04-27 10:06

Eheheh... this topic is a bit old! I will check these functionality
ASAP since I think I will need them to recode my applications. ;-)

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Anonymous · 2006-04-27 12:28

Hello-

I wrote some code that auto-generates a bitmap image:
http://www.sph.sc.edu/comd/rorden/mricron/bounty/
I am not sure if this is what you want. For Windows, I was able to
generate a Bitmap directly, but for universal code that works in Linux
and Windows, I needed to use IntfGraphics and initially load a sample
bitmap from a file. I doubt this is the most elegant solution, but
maybe it is a starting point.