This:

> GrDrawImageToFit(GrNewPixmap(640, 480, NULL),
>                  myGC, 0, 0, 640, 480,
>                  GrLoadImageFromFile("/path/to/png_with_alpha_channel.png", 
> 0));

fails with the following error:

> nano-X: /path/to/microwin/src/drivers/fblin24.c: 35: linear24_drawpixel: 
> Assertion `c < psd->ncolors' failed.

The function is defined like this:

> /* Set pixel at x, y, to pixelval c*/
> static void linear24_drawpixel(PSD psd, MWCOORD x, MWCOORD y, MWPIXELVAL c)

and the assertion looks like:

>    assert (c < psd->ncolors);

It seems like the PNG buffer is read as 32 bit values, but the
function quickly thereafter turn the pixelval into r, g and b:

>       r = PIXEL888RED(c);
>       g = PIXEL888GREEN(c);
>       b = PIXEL888BLUE(c);

And the pure 'c' is never used again. How about just remove that
assertion? What would then fail? What would else be a way to get
fblin24 handle png's with alpha chan?

Best Regards
Daniel

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