| buffer = any valid screen/image buffer (optional) |
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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.
The buffer parameter isn't required. If omitted, the default buffer set with SetBuffer will be used. See the other commands for more information. See also: LockedPitch, LockedFormat, LockedPixels, ReadPixelFast, WritePixelFast, LockBuffer. |
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; High Speed Graphics Commands
Graphics 640,480,16 ; Draw a bunch of stuff on the screen For t= 1 To 1000 Color Rnd(255),Rnd(255),Rnd(255) Rect Rnd(640),Rnd(480),Rnd(150),Rnd(150),Rnd(1) Next Delay 3000 ; Copy the top half of the screen over the bottom half ; using fast pixels and locked buffers For x = 1 To 640 For y = 1 To 240 LockBuffer FrontBuffer() WritePixelFast x,y+241,ReadPixelFast(x,y) UnlockBuffer FrontBuffer() Next Next Delay 3000 ; Draw the left half of the screen over the right half ; using the slower direct pixel access For x = 1 To 320 For y = 1 To 480 WritePixel x+320,y,ReadPixel(x,y) Next Next |