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Graphics Mode Saturation
Posted: Sun May 10, 2020 5:37 pm
by IRIGIMA
Urgent help required.
Does anyone know how the "Graphics Mode Saturation" works and calculates the results from source / background RGB / HSV values.
Looked everywhere and cannot find online.
Explanation in manual not enough to simulate this filter.
Re: Graphics Mode Saturation
Posted: Sun May 10, 2020 5:43 pm
by Mr. Kibernetik
Maybe these blend mode examples can be of some help for you:
https://developer.apple.com/library/arc ... 2-CJBIJEFG
Re: Graphics Mode Saturation
Posted: Sun May 10, 2020 8:24 pm
by IRIGIMA
Using the saturation filter under a certain condition does not result in what it should.
Can you explain the following:
With a grey background, overlay a rectangle with any colour using the color mode saturation.
The result should be grey - but it is blue.
I have done a lot of research and experimenting, but cannot find a solution.
Here is the code:
setupgraphics:
GRAPHICS
SET TOOLBAR on
GET ORIENTATION P
IF p=1 OR p=3 THEN LET p=5
IF p=2 OR p=4 THEN LET p=6
SET ORIENTATION P
xmax=SCREEN_WIDTH()
ymax=SCREEN_HEIGHT()
draw font size 10
draw color 0,0,0
graphics mode normal
back=0.7
fill color back,back,back
fill rect 0,0 to xmax,ymax
c=0.5
graphics mode saturation
r=rnd(1)
g=rnd(1)
b=rnd(1)
fill color r,g,b
fill rect (xmax/2),(ymax/2) size 30,100
GET PIXEL xmax,ymax COLOR rr,gg,bb
graphics mode normal
draw text r at 10,10
draw text g at 10,20
draw text b at 10,30
draw text rr at 10,60
draw text gg at 10,70
draw text bb at 10,80
refresh