From:	Alex Lowe <ayin AT immediate DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: newbie bitmap question
Date:	Thu, 31 Dec 1998 18:12:23 -0800
Organization:	TempleCRC
Lines:	32
Message-ID:	<368C2F07.502C5F06@immediate.net>
References:	<368C4211 DOT 368399EE AT infoave DOT net>
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To:	djgpp AT delorie DOT com
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To plot the bitmap you need to load it...  Example:

    BITMAP *mytest=load_bitmap("mytest.bmp",0);

then blit it to the screen with the blit() function... look it up in the
allegro docs for syntax... Example:

    blit(mytest,screen,0,0,0,0,BitmapWidth,BitmapHeight);

For tiling just use some 'for' loops... Example:

    for(x=0;x<ScreenWidth/BitmapWidth;x+=BitmapWidth)
        for(y=0;y<ScreenHeight/BitmapHeight;y+=BitmapHeight)
            blit(mytest,screen,0,0,x,y,BitmapWidth,BitmapHeight);

If your bitmap does not fit perfectly then you will end up with a gap on
the right side of your screen... so you may need to have to loops blit
one more extra to fill it in... by showing part of the bitmap...

That should take care of it... hope it helps..

-- Alex
ayin AT immediate DOT net

James5 wrote:
> 
> Hi all. Im new to C as well as DJGPP and need a bit of help with using
> bitmap files. I'm writing small example progams to help me out as I go
> along and was wondering, if I have a file called mytest.bmp.. how can I
> plot the bmp on the screen (anywhere will do), and make another program
> to tile it on the screen (both using Allegro). Any help will be greatly
> appreciated. :)

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