Bert's question clarified: How to put a pixel into a view??
Post: #1
That's really it! All I need to know is how to put a pixel directly into a view, the fastest way possible. I know this must be a "dumb" question to most of you, but please bear with me!!
Thanks to everyone who responded to my last (first) post. I hope this makes the question clearer.
-- Bert
Thanks to everyone who responded to my last (first) post. I hope this makes the question clearer.
-- Bert
Post: #2
The easiest way is to just use:
This will draw a rect of size w(idth) and h(eight). To draw exactly a single pixel at point (10,20):
The 0.5's are there because of the way the coordinate system works in a default view.
There are moer optimal ways, but this is easiest.
Code:
[NSBezierPath fillRect:NSMakeRect(x, y, w, h)];Code:
[NSBezierPath fillRect:NSMakeRect(10.5, 20.5, 1, 1)];There are moer optimal ways, but this is easiest.
Post: #3
It'd be super slow for more than a couple of pixels too, I'd think.
Bert, you'll have to tell us what you want to do at a little higher level, I think, before we can give you any intelligent advice. For example if you want to display a static image, you could load it up and blit it using those same NS* primitives (and do some 2D things like rotations, etc). If you want to do things more complicated than that, especially if it will involved a *lot* of pixel pushing or complex scenes, the answer is likely "GL".
Bert, you'll have to tell us what you want to do at a little higher level, I think, before we can give you any intelligent advice. For example if you want to display a static image, you could load it up and blit it using those same NS* primitives (and do some 2D things like rotations, etc). If you want to do things more complicated than that, especially if it will involved a *lot* of pixel pushing or complex scenes, the answer is likely "GL".
Post: #4
Yes, Dan, OpenGL would be faster, although it's quite a bit more complicated. 
Incidentally, I forgot to mention NSRectFillList() (not specifically Cocoa, but still callable in Obj-C), that will fill a list, and is quite fast.
Does anyone know if these APIs are sped up to use the video card in Tiger (ie, fast without the openGL)?
Incidentally, I forgot to mention NSRectFillList() (not specifically Cocoa, but still callable in Obj-C), that will fill a list, and is quite fast.
Does anyone know if these APIs are sped up to use the video card in Tiger (ie, fast without the openGL)?
Post: #5
That was rumored to happen in 10.4.1 for cards with the necessary shader support (aka Quartz 2D Extreme) but I'm not sure if it really did (don't have one myself...)
