Hi Csongor,
I'm sure that I am missing something, but couldn't you create a second
BI big enough to accomodate your largest zoomed Shape ( or zoomed area, )
and then reuse/redraw as you go, using the appropriate height and width?
Hi Csongor,
Well, there's magic...
Sorry, couldn't resist. Obviously this work has to be done SOMEWHERE.
So, even if you could just pass it off to another class, possibly JAI as you
mentioned previously, something like that is getting done. Is it more
elegant to pass to a hidden
Hi,
I can make some guesses as to how they were designed that might give
better performance. If they store the images in VRAM, then they can
take advantage of hardware acceleration for the blits to the screen.
The downside is that the Windows APIs for doing this are very limited
and so you
Hi Graeme,
I can make some guesses as to how they were designed that might give
better performance. If they store the images in VRAM, then they can
take advantage of hardware acceleration for the blits to the screen.
The downside is that the Windows APIs for doing this are very limited
I am setting my stroke to width 0, which i think means use one pixel
line width. So this works at whatever zoom level.
g.setStroke(new java.awt.BasicStroke(0.0f));
BasicStroke here takes user coords, so to use some other constant pixel
width, you have to calculate what the width is in
You only have to create a new BufferedImage when the user resizes the
window. Zooming and panning is done with a redraw to the existing image.
Hi Joe Sam,
Yes, I could but it's not elegant. Why do I have to recreate in every
zooming step one large (~MB size) buffer? Or are there no
other
Hi,
I have a canvas that displays Shapes (described in application specific
world coords)
by converting them from world space to screen space
(by using the appropirate coord. converter).
I need to implement an efficient hit testing method to select
the Shape that is under the mouse click. The
Hi,
I want to detect intersections of a small rectangle with the outline
of an open-ended (ie., no close path between the end points)
CubicCurve2D.
I am doing a
(ccurve.intersects(rect) == true ccurve.contains(rect) == false)
but this still does not eliminate the cases when the rect includes
Hi Jim,
Can you suggest a way (or a program) to objectively measure the speed of copying an
image from memory to the screen? In a later message, you mentioned that you were
getting 30M pixels/sec and it would be interesting to compare the results I get with
what you found.
My comparison was
Then use direct draw. You have access to everything there. DD is a b*tch to
deal with, but it would make everyone happy to have acceleration in
Swing/AWT/Java2D.
JDK 1.1 also used CreateDIBSection for media/toolkit images. The
images are stored in main memory and not accelerated. This is no
10 matches
Mail list logo
