78 lines
3.5 KiB
Luau
78 lines
3.5 KiB
Luau
-- Composites every visible tile ImageLabel (walking the ScreenGui like Roblox: ZIndex order, nested offsets) onto a
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-- black screen and prints the RGB of a region as hex rows ("ROW y hex"). Compare two backend versions with
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-- tools/test/compare_composite.py to prove a backend change renders the same pixels.
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local G = require(game:GetService("ReplicatedStorage"):WaitForChild("ImGui"))
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local ImGui, ImVec2, ImVec4 = G.ImGui, G.ImVec2, G.ImVec4
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ImGui.CreateContext()
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G.ImGui_ImplRoblox.Init()
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G.ImGui_ImplRoblox.SetRenderRate(0)
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local io = ImGui.GetIO()
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local col = ImVec4(0.4, 0.7, 0.2, 0.5)
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local W, H = 1280, 760
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local frame = 0
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local function composite(gui)
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local screen = buffer.create(W * H * 3)
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local function walk(inst, ox, oy)
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local kids = inst:GetChildren()
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table.sort(kids, function(a, b) return (a.ZIndex or 1) < (b.ZIndex or 1) end) -- table.sort isn't stable, but siblings with equal ZIndex never overlap here
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for _, c in ipairs(kids) do
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if c.Visible ~= false then
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local x, y = ox + (c.Position and c.Position.X or 0), oy + (c.Position and c.Position.Y or 0)
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if c.ClassName == "ImageLabel" then
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local img = c.ImageContent.Object
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local px, sz = img.Pixels, img.Size.X
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for ty = 0, sz - 1 do
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local sy = y + ty
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if sy >= 0 and sy < H then
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for tx = 0, sz - 1 do
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local sx = x + tx
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if sx >= 0 and sx < W then
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local o = (ty * sz + tx) * 4
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local a = buffer.readu8(px, o + 3)
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if a > 0 then
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local d = (sy * W + sx) * 3
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local fa = a / 255
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for ch = 0, 2 do
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local v = buffer.readu8(px, o + ch) * fa + buffer.readu8(screen, d + ch) * (1 - fa)
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buffer.writeu8(screen, d + ch, math.floor(v + 0.5))
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end
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end
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end
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end
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end
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end
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end
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walk(c, x, y)
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end
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end
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end
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walk(gui, 0, 0)
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return screen
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end
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game:GetService("RunService").Stepped:Connect(function()
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frame += 1
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G.ImGui_ImplRoblox.NewFrame()
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io.DeltaTime = 1 / 60
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io:AddMousePosEvent(300 + (frame * 37) % 300, 100 + (frame * 53) % 500)
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ImGui.NewFrame()
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ImGui.ShowDemoWindow(true)
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ImGui.SetNextWindowPos(ImVec2(20, 20)); ImGui.SetNextWindowSize(ImVec2(600, 700))
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ImGui.Begin("Pickers")
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ImGui.ColorPicker4("bar", col, G.ImGuiColorEditFlags.PickerHueBar)
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ImGui.ColorPicker4("wheel", col, G.ImGuiColorEditFlags.PickerHueWheel)
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ImGui.End()
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ImGui.Render()
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G.ImGui_ImplRoblox.RenderDrawData(ImGui.GetDrawData())
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if frame == ARG_FRAMES - 1 then
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local gui = game:GetService("Players").LocalPlayer.PlayerGui:FindFirstChild("ImGui")
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local screen = composite(gui)
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for y = 0, H - 1 do
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local t = table.create(W * 3)
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for i = 0, W * 3 - 1 do t[i + 1] = string.format("%02x", buffer.readu8(screen, y * W * 3 + i)) end
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print("ROW", y, table.concat(t))
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end
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end
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end)
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