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From: Vincent Petruccelli on 5 Jan 2008 06:08
I am using Visual C++ to write a simple computer game, using bitmap images.
However, I can only use 16 colors in a given bitmap. If I try to import a
bitmap from Paint, which has (say) 256 colours, Visual C++ always reduces
the palette down to 16 colors, often ruining the image.

Is there any way to tell Visual C++ to allow for more than 16 colors in a
bitmap?

Any help much appreciated. Thanks.


From: Francis Glassborow on 5 Jan 2008 06:22
Vincent Petruccelli wrote:
> I am using Visual C++ to write a simple computer game, using bitmap images.
> However, I can only use 16 colors in a given bitmap. If I try to import a
> bitmap from Paint, which has (say) 256 colours, Visual C++ always reduces
> the palette down to 16 colors, often ruining the image.
>
> Is there any way to tell Visual C++ to allow for more than 16 colors in a
> bitmap?
>
> Any help much appreciated. Thanks.
>
>

I guess the answer would be yes but this is not the place to ask the
question. You need a specialist forum for Visual C++.
From: Alf P. Steinbach on 5 Jan 2008 06:28
* Vincent Petruccelli:
> I am using Visual C++ to write a simple computer game, using bitmap images.
> However, I can only use 16 colors in a given bitmap. If I try to import a
> bitmap from Paint, which has (say) 256 colours, Visual C++ always reduces
> the palette down to 16 colors, often ruining the image.
>
> Is there any way to tell Visual C++ to allow for more than 16 colors in a
> bitmap?

This is not a language question but a question about using a particular
IDE (Integrated Development Environment).

Mainly, the answer is to code instead of point-and-click, but check out
a Visual C++ forum, e.g. in the microsoft.* hierarchy.

How to use a particular IDE, or how to programmatically handle a
particular file format, is off-topic here, I'm afraid.


Cheers, & hth.,

- Alf

PS: Anyway, you might try setting the files to "read only" in order to
discourage tools from "helping" you in the Microsoft way; as I recall
Visual Studio will then at least ask before it converts.

--
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From: moschops on 5 Jan 2008 08:31
Vincent Petruccelli wrote:
> I am using Visual C++ to write a simple computer game, using bitmap images.
> However, I can only use 16 colors in a given bitmap. If I try to import a
> bitmap from Paint, which has (say) 256 colours, Visual C++ always reduces
> the palette down to 16 colors, often ruining the image.
>
> Is there any way to tell Visual C++ to allow for more than 16 colors in a
> bitmap?
>
> Any help much appreciated. Thanks.
>
>

When you find a better newsgroup to ask in, be sure to explain how
you're loading the bitmaps from file and how you're displaying them on
screen. Sample code would be a good idea. When you create a blank bitmap
object in a windows environment, you have to specify details including
the number of bits per pixel. If you're not specifying the right number,
you could have trouble.Also, have a look at how you're loading the
bitmap object with the data from the file, and check that you are
actually reading it to the right bitdepth.

'Chops
From: Richard Heathfield on 5 Jan 2008 10:24
Vincent Petruccelli said:

> I am using Visual C++ to write a simple computer game, using bitmap
> images. However, I can only use 16 colors in a given bitmap. If I try to
> import a bitmap from Paint, which has (say) 256 colours, Visual C++
> always reduces the palette down to 16 colors, often ruining the image.
>
> Is there any way to tell Visual C++ to allow for more than 16 colors in a
> bitmap?

Several people have pointed out that this question is OT in acllcc++, but I
don't think you've yet been given a good recommendation for a better
newsgroup. The best group for such questions, in my opinion, is
comp.os.ms-windows.programmer.win32, which is healthily independent of MS
and yet chock-full of expertise. I recommend that you subscribe to it.

Crossposted to that group, followups set.

--
Richard Heathfield <http://www.cpax.org.uk>
Email: -http://www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999
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