JdBP>>> Actually, what I need to do is to write a control window that
 JdBP>>> can be used to display coloured text, rather than relying on a
 JdBP>>> standard MLE control.  I know that these things can be done,
 JdBP>>> because programs like ZOC and LiveWire use such controls for
 JdBP>>> terminal emulator windows.  Does anyone know how they do it ?
 JdBP>>> I've tried rolling my own, but it is *very* slow in repainting
 JdBP>>> (all of those calls to GpiCharStringPosAt() take a long time).

 MR> I can't be sure, because I don't have either program installed, but I
 MR> thought both ZOC and LiveWire actually used a VIO window for the
 MR> terminal.
 MR>
 MR> That would mean a bunch of calls to VioSetState() to set the color
 MR> registers.  It'd probably be more work, but if that's what ZOC and
 MR> LiveWire used, it must be faster.

In the case of PM, a VIO presentation space is simply a handy way of not
having to do the raw character painting onesself.  Unfortunately, in a pure
32-bit application the option of a VIO presentation space is not open to me.

So I'm looking for an efficient way of drawing characters to a presentation
space during a WM_PAINT event myself.  I've constructed a logical screen
buffer, containing the character and attribute pairs, and I want to repaint
the presentation space as appropriate whenever a WM_PAINT comes along.  I used 
GpiCharStringPosAt(), but it is very slow when drawing a single character at a 
time.  Unfortunately, I have to draw single characters at a time when it is
the case that successive characters have different foreground and background
colours.

There must *be* a way to do this, because the VIO library seems to draw
characters (taken from its logical character/attribute video buffer) onto a
presentation space very rapidly.  I was hoping that someone would know what it 
is.

 ¯ JdeBP ®

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