Roblox backend: one layer (Frame + tiles) per draw list so moving windows costs no redraw; gradient rect fast path; t_drag/t_composite checks

2026-10-08 11:10:53 -05:00
parent 71843392f1
commit ceb66d3067
7 changed files with 564 additions and 190 deletions
@@ -0,0 +1,43 @@
+-- Benchmark: drags the demo window (real mouse drag on its title bar) and keeps a color picker window open.
+-- Watch "render" ms and uploads/frame: with per-window layers, dragging should upload ~nothing.
+local G = require(game:GetService("ReplicatedStorage"):WaitForChild("ImGui"))
+local ImGui, ImVec2, ImVec4 = G.ImGui, G.ImVec2, G.ImVec4
+ImGui.CreateContext()
+G.ImGui_ImplRoblox.Init()
+G.ImGui_ImplRoblox.SetRenderRate(0)
+local io = ImGui.GetIO()
+local col = ImVec4(0.4, 0.7, 0.2, 0.5)
+local frame = 0
+local bx, by = 0, 0
+local MODE = ARG_OPEN == true and "picker" or "drag"
+game:GetService("RunService").Stepped:Connect(function()
+    frame += 1
+    G.ImGui_ImplRoblox.NewFrame()
+    io.DeltaTime = 1 / 60
+    if MODE == "drag" then
+        local t = math.abs((frame % 200) - 100) -- triangle wave, smooth back and forth
+        if frame == 5 then local w = ImGui.FindWindowByName("ImGui Sincerely Demo"); bx, by = w.Pos.x + 80, w.Pos.y + 8; io:AddMousePosEvent(bx, by) elseif frame == 6 then io:AddMouseButtonEvent(0, true)
+        elseif frame > 6 then io:AddMousePosEvent(bx - t * 5, by + t * 2) end
+    else
+        io:AddMousePosEvent(60 + (frame * 7) % 200, 80 + (frame * 5) % 200)
+        if frame == 6 then io:AddMouseButtonEvent(0, true) end
+    end
+    ImGui.NewFrame()
+    if MODE == "drag" then
+        if frame < 3 then ImGui.SetNextWindowPos(ImVec2(20, 20)); ImGui.SetNextWindowSize(ImVec2(500, 650)) end
+        ImGui.ShowDemoWindow(true)
+    else
+        ImGui.SetNextWindowPos(ImVec2(20, 20)); ImGui.SetNextWindowSize(ImVec2(700, 700))
+        ImGui.Begin("Pickers")
+        ImGui.ColorPicker4("bar", col, G.ImGuiColorEditFlags.PickerHueBar)
+        ImGui.ColorPicker4("wheel", col, G.ImGuiColorEditFlags.PickerHueWheel)
+        ImGui.End()
+    end
+    ImGui.Render()
+    G.ImGui_ImplRoblox.RenderDrawData(ImGui.GetDrawData())
+    if frame == ARG_FRAMES - 1 and MODE == "drag" then
+        local w = ImGui.FindWindowByName("ImGui Sincerely Demo")
+        assert(w.Pos.y > 25, "window was not dragged")
+        print("DRAG OK", w.Pos.x, w.Pos.y, w.Collapsed, ImGui.GetDrawData().TotalVtxCount)
+    end
+end)