Rendering a Raw Image into a Qwt Plot

[CaveTroll]

Greetings,

I would like to render raw imagery (Bit 16 unsigned) into my Qwt plot and I am just a little confused about the proper method of going about it. I have browsed this forum as well wherever my good friend google takes me and I have seen different methods, but none for raw imagery. Do I use QwtPlotRasterItem for this? Can Qwt even support raw imagery? Thanks in advance.

[Uwe]

I would like to render raw imagery (Bit 16 unsigned) into my Qwt plot and I am just a little confused about the proper method of going about it. I have browsed this forum as well wherever my good friend google takes me and I have seen different methods, but none for raw imagery. Do I use QwtPlotRasterItem for this?

When your image is somehow related to plot coordinates yes - otherwise no.

Can Qwt even support raw imagery?

QwtPlotRasterItem wants you to return a QImage. How to build this QImage from your data is up to you ( read the docs of QImage ), but from looking at the Qwt code it has to be a 8 bit or 32 bit image. When you want to use QwtPlotRasterItem::setAlpha a 32 bit image has to be QImage::Format_ARGB32.

So QImage::Format_ARGB32 or QImage::Format_Indexed8 is what the implementation of YourRasterItem::renderImage() is supposed to to return.

Uwe