The pixel-canvas surface (surface 3): a CHR-RAM window the P8 drawing verbs paint into. This draws a bordered box with both diagonals, a filled center circle, and a ring - a static "vector logo". It settles over about a second (the NES VRAM queue drains ~16 writes per frame, so the canvas uploads a tile per frame).
function _init()
nes.canvas_at(8, 6, 12, 8) -- an 8x6-tile canvas (64x48 px), centered
rect(1, 1, 62, 46, 1) -- border
line(1, 1, 62, 46, 1) -- diagonal
line(62, 1, 1, 46, 1) -- anti-diagonal
circfill(32, 24, 10, 1) -- center bloom
circ(32, 24, 16, 1) -- ring
end
function _draw()
cls(0) -- backdrop only; the canvas is drawn in _init
end
Real frame captured from the fceumm core (2x integer scale of native 256x224).
neslua build main.lua -o canvas.nes