mirror of
https://github.com/irmen/prog8.git
synced 2024-09-07 19:54:26 +00:00
70 lines
1.3 KiB
Lua
70 lines
1.3 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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uword ww = 0
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ubyte bc
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uword wc
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for bc in "irmen" {
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; +5 -> 17
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txt.chrout(bc)
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ww++
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}
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txt.print_uw(ww)
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txt.nl()
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for wc in [1000,1111,1222] {
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txt.print_uw(wc)
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txt.spc()
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ww++ ; +3 -> 20
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}
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txt.print_uw(ww)
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txt.nl()
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for bc in 10 to 20 step 3 {
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; 10,13,16,19 -> 4
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ww++
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}
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txt.print_uw(ww)
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txt.nl()
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for bc in 30 to 10 step -4 {
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; 30,26,22,18,14,10,6,2 -> +8 -> 12
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ww++
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}
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txt.print_uw(ww)
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txt.nl()
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sys.exit(99)
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syscall1(8, 0) ; enable lo res creen
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ubyte shifter
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shifter >>= 1
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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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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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