LÖVE backend + build target (compat/luajit.lua shims, Roblox build unchanged), examples/example_love, examples/example_shared (same app on Roblox and LÖVE), LuaJIT checksum tests

2026-10-08 19:31:22 -05:00
parent 81c5ad9e43
commit 66fa061089
23 changed files with 56780 additions and 17 deletions
@@ -0,0 +1,53 @@
+-- One UI that runs unchanged on Roblox and LÖVE: only the Dear ImGui API is used, and the code is plain Lua 5.1
+-- (no Luau-only syntax), so both Luau and LuaJIT run it. The platform launchers are roblox.client.luau and main.lua.
+--   local App = require(app)(G)   -- G = the table returned by the ImGui bundle
+--   every frame, between ImGui.NewFrame() and ImGui.Render():  App.Frame()
+return function(G)
+    local ImGui, ImVec2, ImVec4 = G.ImGui, G.ImVec2, G.ImVec4
+    local App = {
+        Platform = "?",                                  -- set by the launcher ("Roblox" / "LÖVE")
+        ClearColor = ImVec4(0.45, 0.55, 0.60, 1.00),     -- launchers may use it as the background colour
+    }
+    local show_demo, show_table = false, true
+    local counter, speed = 0, 1.0
+    local name = ImGui.NewTextBuffer("Player", 64)
+    local samples, t = {}, 0.0
+    local items = { { "Sword", 1, 120 }, { "Potion", 5, 15 }, { "Arrow", 64, 1 }, { "Shield", 1, 80 } }
+
+    function App.Frame()
+        local io = ImGui.GetIO()
+        t = t + io.DeltaTime * speed
+        for i = 1, 90 do samples[i] = math.sin(i / 90 * math.pi * 4 + t * 3) end
+
+        ImGui.SetNextWindowPos(ImVec2(20, 20), G.ImGuiCond.FirstUseEver)
+        ImGui.SetNextWindowSize(ImVec2(420, 360), G.ImGuiCond.FirstUseEver)
+        ImGui.Begin("Shared Example")
+        ImGui.Text("Running on %s (%.1f FPS)", App.Platform, io.Framerate)
+        ImGui.Separator()
+        ImGui.InputText("name", name, 64)
+        if ImGui.Button("Click me") then counter = counter + 1 end
+        ImGui.SameLine(); ImGui.Text("%s clicked %d times", ImGui.TextBufferToString(name), counter)
+        speed = ImGui.SliderFloat("speed", speed, 0.0, 4.0)
+        ImGui.ColorEdit3("background", App.ClearColor)
+        ImGui.PlotLines("wave", samples, nil, #samples, 0, nil, -1.0, 1.0, ImVec2(0, 60))
+        local _
+        _, show_table = ImGui.Checkbox("Inventory table", show_table)
+        ImGui.SameLine(); _, show_demo = ImGui.Checkbox("Demo window", show_demo)
+        if show_table and ImGui.BeginTable("inv", 3, bit32.bor(G.ImGuiTableFlags.Borders, G.ImGuiTableFlags.RowBg, G.ImGuiTableFlags.Sortable)) then
+            ImGui.TableSetupColumn("Item"); ImGui.TableSetupColumn("Count"); ImGui.TableSetupColumn("Value")
+            ImGui.TableHeadersRow()
+            for _, it in ipairs(items) do
+                ImGui.TableNextRow()
+                ImGui.TableNextColumn(); ImGui.Text(it[1])
+                ImGui.TableNextColumn(); ImGui.Text("%d", it[2])
+                ImGui.TableNextColumn(); ImGui.Text("%d", it[3])
+            end
+            ImGui.EndTable()
+        end
+        ImGui.End()
+
+        if show_demo and ImGui.ShowDemoWindow then show_demo = ImGui.ShowDemoWindow(show_demo) end
+    end
+
+    return App
+end
@@ -0,0 +1,5 @@
+function love.conf(t)
+    t.window.title = "Dear ImGui - shared example (LÖVE)"
+    t.window.width, t.window.height = 1280, 800
+    t.window.resizable = true
+end
@@ -0,0 +1,15 @@
+{
+  "name": "imgui-shared-example",
+  "tree": {
+    "$className": "DataModel",
+    "ReplicatedStorage": {
+      "ImGui": { "$path": "../../build/ImGui.luau" },
+      "SharedApp": { "$path": "app.lua" }
+    },
+    "StarterPlayer": {
+      "StarterPlayerScripts": {
+        "SharedExample": { "$path": "roblox.client.luau" }
+      }
+    }
+  }
+}
@@ -0,0 +1,43 @@
+-- LÖVE launcher for app.lua:  python3 tools/bundle.py --target love  then  love examples/example_shared
+local ROOT = love.filesystem.getSource() .. "/../../"   -- repo root (build/, fonts/)
+local function load_bundle()
+    local f = assert(io.open(ROOT .. "build/imgui_love.lua", "rb"), "run: python3 tools/bundle.py --target love")
+    local src = f:read("*a"); f:close()
+    return assert(loadstring(src, "@imgui_love.lua"))()
+end
+
+local G, ImGui, App
+
+function love.load()
+    G = load_bundle()
+    ImGui = G.ImGui
+    ImGui.CreateContext()
+    local io = ImGui.GetIO()
+    io.ConfigFlags = bit32.bor(io.ConfigFlags, G.ImGuiConfigFlags.NavEnableKeyboard, G.ImGuiConfigFlags.DockingEnable)
+    io.IniFilename = nil
+    G.ImGui_ImplLove.Init({ root = ROOT })
+    App = love.filesystem.load("app.lua")()(G)
+    App.Platform = "LÖVE"
+end
+
+function love.update(dt)
+    G.ImGui_ImplLove.NewFrame()
+    ImGui.NewFrame()
+    App.Frame()
+    ImGui.Render()
+end
+
+function love.draw()
+    local c = App.ClearColor
+    love.graphics.clear(c.x, c.y, c.z, 1)
+    G.ImGui_ImplLove.RenderDrawData(ImGui.GetDrawData())
+end
+
+function love.mousemoved(x, y) G.ImGui_ImplLove.MouseMoved(x, y) end
+function love.mousepressed(x, y, b) G.ImGui_ImplLove.MousePressed(x, y, b) end
+function love.mousereleased(x, y, b) G.ImGui_ImplLove.MouseReleased(x, y, b) end
+function love.wheelmoved(x, y) G.ImGui_ImplLove.WheelMoved(x, y) end
+function love.keypressed(k) G.ImGui_ImplLove.KeyPressed(k) end
+function love.keyreleased(k) G.ImGui_ImplLove.KeyReleased(k) end
+function love.textinput(t) G.ImGui_ImplLove.TextInput(t) end
+function love.focus(f) G.ImGui_ImplLove.Focus(f) end
@@ -0,0 +1,21 @@
+-- Roblox launcher for app.lua (sync with examples/example_shared/default.project.json).
+local ReplicatedStorage = game:GetService("ReplicatedStorage")
+local RunService = game:GetService("RunService")
+local G = require(ReplicatedStorage:WaitForChild("ImGui"))
+local ImGui = G.ImGui
+
+ImGui.CreateContext()
+local io = ImGui.GetIO()
+io.ConfigFlags = bit32.bor(io.ConfigFlags, G.ImGuiConfigFlags.NavEnableKeyboard, G.ImGuiConfigFlags.DockingEnable)
+G.ImGui_ImplRoblox.Init()
+
+local App = require(ReplicatedStorage:WaitForChild("SharedApp"))(G)
+App.Platform = "Roblox"
+
+RunService.Stepped:Connect(function()
+    G.ImGui_ImplRoblox.NewFrame()
+    ImGui.NewFrame()
+    App.Frame()
+    ImGui.Render()
+    G.ImGui_ImplRoblox.RenderDrawData(ImGui.GetDrawData())
+end)