black & white for Screen 12

[Daniel Raymer]

Using graphics mode Screen 12, what COLOR foreground,background should I use to get the whitest possible background and the blackest possible foreground? (0,63 gives a nice white background but no foreground.
Also, does anyone have a full listing of all 1-15 foreground colors and 0 to 63 background colors? My manual doesn't.

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[Don Schullian]

If I remember correctly
0 = Black RGB(0,0,0) AND 15 = White RGB(255,255,255) and
it doesn't get any better than that.

However, if you're looking for impact then use yellow (14) and black.


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C'ya
Don
[email protected]

[Tom Hanlin]

See PALETTE.

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Tom Hanlin, PowerBASIC Staff
Opinions expressed may not be those of my employer or myself

[Daniel Raymer]

I tried 0 & 15 - see code below. In my falling-apart, much-beloved PB-DOS manual, the writeupt for PALETTE describes how to change it but doesn't actually say what colors are produced!

screen 12
COLOR 15,0
CLS
LINE (0,0)-(500,500)
LOCATE 20,1
INPUT "ENTER TO CONTINUE TEST - NEXT SCREEN SHOULD BE WHITE WITH BLACK LINE",DUM
COLOR 0,15
CLS
LINE (0,0)-(500,500)
INPUT DUM
LOCATE 20,1
COLOR 4,0
INPUT "I GET A DIRTY WHITE SCREEN WITH NO LINE - HELP!",DUM
END

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[Fred Buffington]

How bout this

  SCREEN 12
  Red%=63 : green%=63: Blue%=63
  A&=(65536*Blue%) + (256*green%) + red%
  Palette 7,A&
  Color 7
  For k&=0 to 500
    LINE (0,k&)-(500,k&)
  next k&
  color 0
  Line (0,0)-(500,500)
  while inkey$="":wend

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Client Writeup for the CPA


mailto:[email protected][email protected]</A>

[Daniel Raymer]

Fred's code gives black on white, but it shouldn't be necessary to paint the background one line at a time! Surely there is a way to use COLOR and CLS to make a true white background (like on this page) and draw a black line on it.

Or is there?


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[Gerhard Kropf]

Why not use just a simple LINE instead of CLS to erase the full screen to white?


screen 12

line (0,0)-(639,479),15,bf

for z=0 to 640 step 2

line (320,480)-(z,0),0

next z

while instat=0:wend

G.


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[Fred Buffington]

I had first tried the bf parameter in the line statement actually
but wasn't getting the bright white so finally resorted to this
(in response to the initial problem) which is fairly fast.

I don't do much in dos anymore and didn't use graphics much amyway.
Mostly business programs where usually I only needed text mode
screen 0.



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Client Writeup for the CPA


mailto:[email protected][email protected]</A>

[Gerhard Kropf]

Fred,

just add a line(0,0)-(639,100),15,bf to your code
(before the while inkey$ loop) and see, which area is "more"
white. I believe, both are same

G.

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