OR (graphics Put)

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgOrGfx
• Last revised: 2023-07-09

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

Syntax

` 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 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 Or.

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.

Examples

start GeSHi

''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, RGBA(0, 0, 0, 0))
Circle cr, (r, r), r, RGB(255, 0, 0), , , 1, f
Circle cg, (r, r), r, RGB(0, 255, 0), , , 1, f
Circle cb, (r, r), r, RGB(0, 0, 255), , , 1, f

''put the sprite 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

end GeSHi

Differences from QB

• None

See also

• Or
• Put (Graphics)

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