Hi,
In a certain piece of code we were using
Jai to dither a rendering of our chart objects, however this caused some
performance issues and we noticed the RenderingHints.KEY_DITHERING
so we tried moving the dithering
into the rendering of the chart that was already using the graphics2D of
a
Hi Eric,
final BufferedImage buf = new BufferedImage(Math.round(fWidth*scale),
Math.round(fHeight*scale), BufferedImage.TYPE_BYTE_BINARY, new
Well, here's you problem. You're creating a binary image, with
only two possible colors. So the dithering can't be smooth by
definition - each
Hello,
I think you can do something like this:
1. Create a BufferedImage of appropriate type (say, INT_RGB)
2. get the array from the DataBuffer
(((DataBufferInt)(BI.getRaster().getDataBuffer())).getData() in case
of INT_[A]RGB image type) and pass it to the native code
3. At
Thanks Dimitri, You've confirmed my initial guess at what would make the most
sense. I have one minor question...
If I were to use TYPE_3BYTE_BGR I assume that the array is padded at the end of
each line much like a Windows BITMAP would expect for alignment. The
documentation for
I looked at the documentation for SampleModel, DataBuffer, and Raster and
didn't find anything that looked like it would give me the scanline stride. It
isn't critical as I think I will use INT_BGR anyway.
Thanks,
Scott
[Message sent by forum member 'swpalmer' (swpalmer)]
Hi Scott,
The scanlineStride property isn't defined on the base SampleModel
class, but it is on ComponentSampleModel (which is the SM used by
TYPE_3BYTE_BGR):
http://download.java.net/jdk6/docs/api/java/awt/image/
ComponentSampleModel.html
Thanks,
Chris
On May 11, 2006, at 11:01 AM, [EMAIL
Hi Erik,
There are likely 2 different issues that you are dealing with here.
First is the issue of dithering during drawing vs. during imaging. We
currently do dithering when rendering an image into a lower color
resolution destination, but we don't do any dithering at all when we do
draw and
