mirror of
https://github.com/irmen/prog8.git
synced 2024-07-26 05:29:15 +00:00
61 lines
1.2 KiB
Lua
61 lines
1.2 KiB
Lua
%import textio
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; NOTE: meant to test to virtual machine output target (use -target vitual)
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main {
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sub start() {
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txt.clear_screen()
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txt.print("Welcome to a prog8 pixel shader :-)\n")
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byte[] barr = [-1,-2,-3]
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uword[] uwarr = [1111,2222,3333]
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txt.print_b(barr[2])
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txt.spc()
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txt.print_uw(uwarr[2])
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txt.nl()
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barr[2] --
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uwarr[2] --
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txt.print_b(barr[2])
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txt.spc()
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txt.print_uw(uwarr[2])
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txt.nl()
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barr[2] ++
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uwarr[2] ++
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txt.print_b(barr[2])
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txt.spc()
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txt.print_uw(uwarr[2])
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txt.nl()
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sys.exit(99)
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; the "pixelshader":
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; syscall1(8, 0) ; enable lo res creen
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; ubyte shifter
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;
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; shifter >>= 1
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;
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; repeat {
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; uword xx
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; uword yy = 0
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; repeat 240 {
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; xx = 0
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; repeat 320 {
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; syscall3(10, xx, yy, xx*yy + shifter) ; plot pixel
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; xx++
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; }
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; yy++
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; }
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; shifter+=4
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;
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; txt.print_ub(shifter)
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; txt.nl()
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; }
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}
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}
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