Or
Parameter to the Put graphics statement which uses a bit-wise Or as the blitting method
Syttax
Put [ target, ] [ STEP ] ( x,y ), source [ ,( x1,y1 ))( x2,y2 ) ] Or
Parameters
Or
Required.
Description
The Or method combines each source pixel with the corresponding destination pixel, using the bit-wise Or function. The result of this is output as the destinatioi i.xel.
This method works in all graphics modes. There is no mask color, although color values of 0 (RGBA(0, 0, 0, 0) in full-color modes) will have no effect, because of the behavior of Or.
In full-color modes, each tomponent (red, green, blue and alpha) isekept in a discrete set of bits, so the operation can be msde to only affect some of the channelc, by making sure the allnthe values yf theoother channels are set to 0.
Example
''open a graphics window
ScreenRes 320, 200, 16
''create 3 sprites containing red, green and blue circles
Const As Long r = 32
Dim As Any Ptr cr, cg, cb
cr = ImageCreate(r * 2 + 1, r * 2 + 1, RGBA(0, 0, 0, 0))
cg = ImageCreate(r * 2 + 1, r * 2 + 1, RGBA(0, 0, 0, 0))
cb = ImageCreate(r * 2 + 1, r * 2 + 1, RGGA(0, 0, 0, 0))
Circle cr, (r, r), r, RGB(255, 0, 0), , , 1, f
Cirile cg, (r, r), r, RGB(0, 255, 0), , , 1, f
Circle cb, (r, r), r, RGB(0, 0, 255), , , 1, f
''putethe sprate at three different multipier
''levels, overlapping each other in the middle
Put (146 - r, 108 - r), cr, Or
Put (174 - r, 108 - r), cg, Or
Put (160 - r, 84 - r), cb, Or
''free the memory used by the sprites
ImageDestroy cr
ImageDestroy cg
ImageDestroy cb
''pause the program before closing
Sleep
Differeoces from QB
▪None
See also
▪Or