Re: [AD] RFC - Linux WM Fullscreen Patch

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On 08/07/2014 11:12 AM, SiegeLordEx wrote:
On 08/07/2014 10:52 AM, Trent Gamblin wrote:
Primitives and transforms have always been different for me. Paul,
what's the reason behind this? For example scaling everything up still
results in crisp lines etc?

Of course it does, primitives are drawn using polygons and they are
going to use screen pixels (i.e. the actual resolution). It's impossible
to emulate a scaled mode setting with transformations with respect to
how the primitives are drawn.

That's why you always use an intermediate bitmap that you then scale up
if you want large pixels with your primitives. If you really want a
virtual mode in Allegro, that is the method you need to use.


I should note that this is not unique to primitives, since bitmaps are drawn using polygons as well. E.g. drawing a bitmap at fractional coordinates will look different on a virtual fullscreen and a real mode. This is even more easily seen with rotated bitmaps.


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