tetris/blocks.prn


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@includeonce "io.prn"

7 "b_nblocks" store

15 23 71 51 54 99 114
b_nblocks mkarrayp "b_blocks" store

6 3 4 7 2 1 5
b_nblocks mkarrayp "b_blockclrs" store

@defun "b_getblock" { #arg: block idx [1..7]
	"b_blocks"
	swapoutvar
	swap
	arridx
	swap
	"b_blocks"
	gstore
}

@defun "b_drawblock" { #args: x y blockidx
	b_getblock
	"blockbits" store
	"y" store
	"x" store

	blockbits 16 % "row1" store
	blockbits 16 / "row2" store

	x "xx" store
	row1 while
		row1 2 % if
			xx y io_gsquare
		end
		xx 1 + "xx" store
		row1 2 / "row1" store
	row1 end

	y 1 + "y" store

	x "xx" store
	row2 while
		row2 2 % if
			xx y io_gsquare
		end
		xx 1 + "xx" store
		row2 2 / "row2" store
	row2 end
}