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Re: Color and RGBA [message #35506 is a reply to message #35505]

Fri, 24 February 2012 08:06

unodgs
Messages: 1366
Registered: November 2005
Location: Poland

Ultimate Contributor

Tom1 wrote on Thu, 23 February 2012 16:49

Hi,
I like double coordinates on Painter, but I would still like to preserve integers on Draw :

- Storing doubles takes twice as much memory.
- I have an impression (dating years back though) that computing with doubles is slower than with integers.
- GDI and X are mapped directly to integer

I like integers too, but the common resolution for different "Painters" is double. But having doubles is not something I going to insist on.

Quote:

How about offering Painter interface to Ctrls as an option to the
Draw version?:
void Paint(Painter &painter);

And which one should be chosen by CtrlPaint ? (if CtrlPaint would be a part of rainbow then it could make sense) IMO there should be only one Paint to keep things simple. Besides I prefer Draw as its much simpler to implement.

Quote:

Slightly off-topic: I have recently found that the 2D performance offered by Windows GDI can be attained by software rendering. (Maybe because on Windows Vista/7 GDI is more or less software rendering anyway.) So I have started to render with BufferPainter + SetSurface(). Also having Wayland on its way to Linux, I expect applications will end up rendering display buffers on their own without much support from specific hardware. It seems to me Upp::Painter interface is a nice and clean way to do what is inevitable in not so far future, so why not having a "void Paint(Painter &painter);"?

Mirek tried to replace GDI with software rendering some time ago but at that time WinXP was an os king and GDI was faster on many machines. But maybe it's a good time to look at it one more time. But as I said I'm not fun of Painter to be a common interface for every renderer (or maybe I need to take a closer look at it Smile

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