Oxygen Basic

Programming => Problems & Solutions => Topic started by: Aurel on July 09, 2012, 06:17:50 AM

Title: RGB func
Post by: Aurel on July 09, 2012, 06:17:50 AM

I try to use RGB() function from old examples and i'm found that
something not work properly in mine GUI examples.
Old code is:

Code: [Select]

Function RGB(sys red, green, blue) as sys
Function = red + green*256 + blue*65536
End Functioni also try this to:

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Function RGB(sys red,green,blue) as sys
green *=256: blue *=65536
Return red+green+blue             
End Function
And still i have wrong colors, it looks weird to me because in examples both
function works.
Then i found code for RGB() in DLib and finally this code work properly:  :)

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Function RGB(sys red,green,blue) as sys
  sys color
  color = red
  color = color + green*256
  color = color + blue*65536
  Return color
End Function
Just for example i use RGB() function under message WM_PAINT
After window is created set DC:

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'create window
win = SetWindow("Test AwinH",x,y,w,h,0,winstyle)
INT hDC=GetDC(win)
Then under WM_PAINT:

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CASE WM_PAINT

'draw vertical lines--------
For x = 5 to 10
For y = 100 to 300
PSet(hdc, x, y, 242,242,222)
Next
Next
ReleaseDC(win,hdc)
I hope that will be useful... ;)

Title: Re: RGB func
Post by: Charles Pegge on July 09, 2012, 07:34:46 PM

You can easily check the output of an rgb function like this:

Code: OxygenBasic

1. function rgb(sys r,g,b) as sys
2. return r+g*0x100+b*0x10000
3. end function
4.  
5. print hex rgb(0xaa,0xbb,0xcc)
6.  

Title: Re: RGB func
Post by: Aurel on July 09, 2012, 09:31:04 PM

Thanks Charles...

Quote

What's the difference?

Big...on old way i get wrong colors mostly without blue component.
On this new way output is correct.
I will add exemple and you will show that i'm in right...
...if you don't belive :P