fix: simplify GPU init to match working examples (refreshSize + sleep(0) + setSize)

programs/roulette.lua

@@ -43,42 +43,18 @@ local function findGPU()
 end
 
 local function makeGpuBackend(gpu)
-    -- refreshSize() is async: it schedules the monitor-wall scan on the
+    -- refreshSize() schedules a server-thread monitor scan asynchronously.
-    -- server thread and returns immediately.  Poll until blocksX or
+    -- sleep(0) yields back to the server, giving it a tick to finish.
-    -- blocksY grows, or we time out (2 s).
     gpu.refreshSize()
-    local pw, ph, bx, by, sb
+    sleep(0)
-    local deadline = os.clock() + 2
+    gpu.setSize(64)
-    repeat
-        sleep(0.1)
-        pw, ph, bx, by, sb = gpu.getSize()
-    until ((bx or 0) > 1 or (by or 0) > 1) or os.clock() >= deadline
 
-    -- If still 1x1 try once more after a longer wait, then proceed anyway.
+    local pw, ph, bx, by, sb = gpu.getSize()
-    if (bx or 0) <= 1 and (by or 0) <= 1 then
-        sleep(0.5)
-        pw, ph, bx, by, sb = gpu.getSize()
-    end
-
-    -- Try a high per-block resolution; fall back if GPU tier caps it.
-    local trySizes = { 64, 32, 16, 8 }
-    for _, s in ipairs(trySizes) do
-        if pcall(gpu.setSize, s) then break end
-    end
-    -- Re-read size after setSize (pixel dimensions change).
-    pw, ph, bx, by, sb = gpu.getSize()
     print(("[roulette] GPU pixel size: %sx%s  blocks: %sx%s  per-block: %s")
         :format(tostring(pw), tostring(ph), tostring(bx), tostring(by), tostring(sb)))
 
-    if (bx or 0) <= 1 and (by or 0) <= 1 then
-        print("[roulette] WARNING: GPU only sees 1 monitor block.")
-        print("[roulette]  - GPU must be horizontally adjacent (N/S/E/W) to a monitor.")
-        print("[roulette]  - All monitor blocks in the wall must face the SAME direction.")
-        print("[roulette]  - The wall must be a solid rectangle of monitor blocks (no gaps).")
-    end
-
     if not pw or not ph or pw < 8 or ph < 8 then
-        error(("GPU reports unusable pixel size %sx%s. Place at least one screen block adjacent to the GPU.")
+        error(("GPU reports unusable pixel size %sx%s.")
             :format(tostring(pw), tostring(ph)))
     end