Xor (Graphics Put)keyword

Parameter to the Put graphics statement which uses a bit-wise Xor as the blitting method

Syntax

Put [ target, ] [ STEP ] ( x,y ), source [ ,( x1,y1 )-( x2,y2 ) ], Xor

Description

The Xor method combines each source pixel with the corresponding destination pixel, using the bit-wise Xor function. The result of this is output as the destination pixel.
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 Xor.

In full-color modes, each component (red, green, blue and alpha) is kept in a discrete set of bits, so the operation can be made to only affect some of the channels, by making sure the all the values of the other channels are set to 0.

Remarks

Differences from QB

• None
  
  

See also

• Xor
  
• Put (Graphics)
  
  

Example

''open a graphics window

ScreenRes 320, 200, 16



''create a sprite containing a circle

Const As Integer r = 32

Dim c As Any Ptr = ImageCreate(r * 2 + 1, r * 2 + 1, 0)

Circle c, (r, r), r, RGBA(255, 255, 255, 0), , , 1, f



''put the three sprites, overlapping each other in the middle

Put (146 - r, 108 - r), c, Xor

Put (174 - r, 108 - r), c, Xor

Put (160 - r,  84 - r), c, Xor



''free the memory used by the sprite

ImageDestroy c



''pause the program before closing

Sleep

Reference

• Documented in KeyPgXorGfx.html