[Lazarus] TPicture width questions (duplicate ways)

[noreply at z505.com]

On 2017-03-09 10:48, José Mejuto via Lazarus wrote:
> 
> AFAIK:
> 
> TPicture.Width is the TGraphic container size.
> TPicture.jpeg.Width is the width declared in the jpeg image.
> TPicture.Bitmap.Width is the width of the bitmap in pixels.
> 
> Mostly the 3 will have the same value but extracted from different 
> sources.
> 

If I start off using a bitmap, and all of a sudden start using jpeg, 
will it automagically work or does one have to initiate the jpeg in some 
way?

Example: you start off working with a classic BMP, but then 60 lines of 
code later you want to work with it as a jpeg. Do you just magically 
start working with a jpeg without any worry, or you have to take some 
precautions?

Likely, this is explained in a article on the wiki somewhere, I don't 
know :-)