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- <title>Blitz3D Docs</title>
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- <h1>UnlockBuffer buffer</h1>
- <h1>Parameters</h1>
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- buffer = any valid screen/image buffer (optional)
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- <h1>Description</h1>
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- After you use LockBuffer on a buffer, the only graphics commands you can use are the read/write pixel commands ReadPixel, WritePixel, ReadPixelFast, and WritePixelFast. You must use this command before using other graphics commands.
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- The buffer parameter isn't required. If omitted, the default buffer set with SetBuffer will be used.
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- See the other commands for more information.
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- See also: <a class=small href=LockedPitch.htm>LockedPitch</a>, <a class=small href=LockedFormat.htm>LockedFormat</a>, <a class=small href=LockedPixels.htm>LockedPixels</a>, <a class=small href=ReadPixelFast.htm>ReadPixelFast</a>, <a class=small href=WritePixelFast.htm>WritePixelFast</a>, <a class=small href=LockBuffer.htm>LockBuffer</a>.
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- <h1><a href=../2d_examples/UnlockBuffer.bb>Example</a></h1>
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- ; High Speed Graphics Commands
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- Graphics 640,480,16
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- ; Draw a bunch of stuff on the screen
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- For t= 1 To 1000
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- Color Rnd(255),Rnd(255),Rnd(255)
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- Rect Rnd(640),Rnd(480),Rnd(150),Rnd(150),Rnd(1)
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- Next
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- Delay 3000
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- ; Copy the top half of the screen over the bottom half
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- ; using fast pixels and locked buffers
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- For x = 1 To 640
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- For y = 1 To 240
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- LockBuffer FrontBuffer()
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- WritePixelFast x,y+241,ReadPixelFast(x,y)
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- UnlockBuffer FrontBuffer()
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- Next
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- Next
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- Delay 3000
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- ; Draw the left half of the screen over the right half
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- ; using the slower direct pixel access
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- For x = 1 To 320
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- For y = 1 To 480
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- WritePixel x+320,y,ReadPixel(x,y)
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- Next
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- Next
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