🚀 go-pugleaf

> What is the best way to have a blank TBitmap from a non-empty TBitmap ?
>
> I mean : load an image, and empty it to keep sizes and attributes 
> (Transparency too), but have an "empty" bitmap ?
>


Maybe:

canvas.Brush.Color := clblack;
canvas.Rectangle(0,0,bitmap.Width,bitmap.height);

Jacques 

David HAROUCHE wrote:

> What is the best way to have a blank TBitmap from a non-empty TBitmap
> ?
> 
> I mean : load an image, and empty it to keep sizes and attributes
> (Transparency too), but have an "empty" bitmap ?

A bitmap image has no concept of "empty". It basically is an array of
pixel colors and every possible value of an array element corresponds
to a valid color. So your best bet is to fill the whole bitmap with a
single color, e..g. black.  A TBitmap *does* have a concept of empty,
but it is not what you want, probably. Its Empty property is true as
long as no bitmap file has been loaded into it or some other operation
(like calling Assign, accessing its canvas) has caused it to create an
API bitmap handle. It is not possible to return it to the "Empty" state
afterwards, you can only free the bitmap object and create a new one.
-- 
Peter Below (TeamB)  
Don't be a vampire (http://slash7.com/pages/vampires), 
use the newsgroup archives :
http://www.tamaracka.com/search.htm
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David HAROUCHE wrote:

> I will create a new one each time...
> 
> What if I create one TBitmap at start, fill a second TBitmap, and
> just do assign the first to the second one...? Does that makes both
> the empty I'll wish...?

That takes about five minutes to test, no?

-- 
Peter Below (TeamB)  
Don't be a vampire (http://slash7.com/pages/vampires), 
use the newsgroup archives :
http://www.tamaracka.com/search.htm
http://groups.google.com

>> That takes about five minutes to test, no?
Yes, I had a coffee to drink....

lol

DH