In my experience, when reading the image data like you have done in this
method, the object creation is insignificant compared to the readRaster
call. Generally I think, reading the image data from the graphics card
is going to be very slow.
Sean
On Thu, 2003-10-02 at 04:30, Auguste Genovesio wrote:
> actually this is the same for ImageComponent and Raster so the only
> thing wich should stay - INSIDE - the method should be
>
> SendImage(ctx.readRaster(ras));
>
>
>
> the rest is OUTSIDE, once for all.
>
>
> tiagoscalheiros wrote:
>
> >Hi,
> >
> >I have rewrited the postswap() of a canvas 3d to collect a
> >bufferedImage of the scenario and then sent it to another
> >aplication.
> >
> >The program is working but im having a problem with the
> >performance:
> >I discovered that the method readRaster(Raster r) from
> >graphicsContext3d takes 200ms in Suse Linux 1,8Ghz to
> >retrieve the raster image and that is to slow for the
> >application.
> >
> >I would like to know if someone knows why these method is so
> >slow, if i cann make it faster or if someone knows a better
> >and fast way to get a bufferedImage of one canvas 3d?
> >
> > public void postSwap()
> > {
> > GraphicsContext3D ctx = getGraphicsContext3D();
> >
> > Rectangle rect = this.getBounds();
> >
> > BufferedImage img = new BufferedImage
> >(rect.width,rect.height,
> >
> >BufferedImage.TYPE_INT_RGB);
> >
> > ImageComponent2D comp =
> > new ImageComponent2D(ImageComponent.FORMAT_RGB,
> >img, true, false);
> >
> > Raster ras = new Raster(new Point3f(-1.0f,-1.0f,-
> >1.0f),
> > Raster.RASTER_COLOR,
> > 0,
> > 0,
> > rect.width,
> > rect.height,
> > comp,
> > null);
> >
> >
> > ctx.readRaster(ras);
> >
> > // Now strip out the image info
> >
> > BufferedImage output_img = ras.getImage().getImage();
> >
> > SendImage(output_img);
> >
> > }
> >
> >
> >
> >---
> >Acabe com aquelas janelinhas que pulam na sua tela.
> >AntiPop-up UOL - É grátis!
> >http://antipopup.uol.com.br
> >
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> >
> >
> >
> >
>
>
> --
> A. Genovesio
> Quantitative Image Analysis Group
> Institut Pasteur
> 25, rue du Docteur Roux
> 75724 Paris Cedex 15
>
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