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Overlaying text over top of a bitmap image in Visual C++.

Posted on 2004-09-23
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Last Modified: 2013-12-03
How easy is it to show text over the top of a bitmap image in Visual C++ 6.0?
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Question by:pikco
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8 Comments
 
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Accepted Solution

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Jaime Olivares earned 1600 total points
ID: 12135606
It is very easy.
In your "Paint" event (usually OnPaint or OnDraw):
Paint Bitmap:
-create a compatible dc
-Select bitmap into this dc
-copy to current dc using BitBlt function
Paint Text:
-now create a font object
-select it into current dc
-select font color and alignment
-draw text over bitmap coordinates.
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Author Comment

by:pikco
ID: 12139735
So that would be using a CBitmap object then, to "Select the bitmap into the dc"

My picture is currently an array of bytes, is there any way to read this into a CBitmap?
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Author Comment

by:pikco
ID: 12139740
sorry, i'm still not really sure how to code this, particularly the "Paint text" bit...

thanks for your help.
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LVL 55

Expert Comment

by:Jaime Olivares
ID: 12139823
>My picture is currently an array of bytes, is there any way to read this into a CBitmap?
You can do it with CBitmap::CreateBitmap() easily, if your array is properly ordered. Take a look to this previous question:
http://www.experts-exchange.com/Programming/Programming_Languages/MFC/Q_20319663.html

>sorry, i'm still not really sure how to code this, particularly the "Paint text" bit...
use CDC::TextOut() function, is as easy as:

CString text="some text";
int x=15;
int y=20;
yourdc.SetTextColor(RGB(255,255,0)); // Yellow
yourdc.TextOut(x, y, text);
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Author Comment

by:pikco
ID: 12154820
ok, i'm not so sure if that CBitmap::CreateBitmap() is going to work for me, but i'll try it soon...

thx
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Author Comment

by:pikco
ID: 12157869
how do i do this?

-create a compatible dc

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LVL 55

Expert Comment

by:Jaime Olivares
ID: 12159660
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Author Comment

by:pikco
ID: 12216374

i finally had some time to try it out, works great.

thanks!
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