Hello,
the d3d pipeline (in java6) does support bilinear filtering.
Are you creating the BufferedImages yourself like
you'd shown or using the 'new BufferedImage(w,h,type)'
constructor? If it's the former, the images will
not be managed.
Also, if you render to this image on every frame
(like in a loop: update a buffered image, stretch it to the
backbuffer) then the image is effectively not accelerated
either since we only cache the image in video
memory after a few copies from the image were made
without the source image modifications.
One thing you can do is to copy the buffered image
with updated pixels to an opaque volatile image (of the
same size), and then stretch that volatile image
to the backbuffer (you will need the ddscale=true
flag for that). Others had done it and it worked fine.
Alternatively, do the same thing with the opengl
pipeline - it would even accelerate the scale
from BI -> VI.
Thanks,
Dmitri
[EMAIL PROTECTED] wrote:
Hi,
I'm unable to use Java2D with the Direct3D pipeline for fast image scaling
(video rendering). Nearest neighbour works fine, no need for Direct3D, but the
quality is poor. Using either bilinear or bicubic scaling leads to poor
performance. What has to be enabled in order to get hardware acceleration?
Dsun.java2d.d3d=True and Dsun.java2d.ddscale=true
Images are stored within a BufferedImage. Usually with:
bMask = 0x000000FF;
gMask = 0x0000FF00;
rMask = 0x00FF0000;
DirectColorModel colorModel = new DirectColorModel(24, rMask, gMask, bMask);
SampleModel sm = new SinglePixelPackedSampleModel(DataBuffer.TYPE_INT,
bounds.width, bounds.height, new int[] { rMask, gMask, bMask });
WritableRaster wr = Raster.createWritableRaster(sm,
scaledDataBuffer, new Point(0, 0));
scaledImage = new BufferedImage(colorModel, wr, true,
null);
I've tried drawing the images either directly in JPanel.repaint(...) or
indirectly by scaling it first into a VolatileImage and then drawing the
VolatileImage.
Using other image formats (like byte arrays) hasn't helped either.
I'm using JDK 6 and Win XP. The graphics cards are a Asus GeForce 7600 GS 512M
and an on-board Intel chip (two different PCs). I would like to use D3D instead
of OpenGL as the driver support seems to be better on Windows (OpenGL does not
work on either of the computers. One cannot enable the pipeline, the other only
shows an empty window).
Thanks, Remo
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