initial commit

launcher/main.lua

@@ -0,0 +1,118 @@
+local gfx = require("gfx")
+local anim = require("anim")
+local keyboard = require("keyboard")
+local gfxplus = require("gfxplus")
+local doublebuf = require("doublebuf")
+local width = gfx.width()
+local height = gfx.height()
+local GREY = gfxplus.hexConvert("#c1c1c1")
+local buf = doublebuf.new(gfx, width, height)
+local g = buf.g
+
+-- Simple screen state + "dirty" redraw flag to avoid full-screen clearing every frame
+local screen = "welcome" -- "welcome" | "testing"
+local dirty = true
+local transitioning = false
+
+-- Frame limiting for animations to reduce visible "clear then draw" flicker on non-double-buffered displays.
+local TARGET_FPS = 30
+local STEP = 1 / TARGET_FPS
+local acc = 0
+
+local inputArmed = false
+local wasPressed = false
+
+local screenOpacity = { value = 1 }
+local a = anim.new()
+
+local function drawWelcome()
+    g.clear(0xFFFF)
+    g.setTextColor(gfxplus.withOpacity(0x0000, 0xFFFF, screenOpacity.value), 0xFFFF)
+    g.setTextSize(2)
+    g.drawCenterString("Welcome", math.floor(width / 2), math.floor(height / 2) - 15)
+    g.setTextSize(1)
+    g.drawCenterString("Press any button to continue", math.floor(width / 2), math.floor(height / 2) + 10)
+    g.setTextColor(gfxplus.withOpacity(GREY, 0xFFFF, screenOpacity.value), 0xFFFF)
+    g.setTextSize(1)
+    g.drawString("Paper Launcher v0.0.1", 5, height - 10)
+end
+
+local function drawTesting()
+    g.clear(0xFFFF)
+    g.setTextColor(gfxplus.withOpacity(0x0000, 0xFFFF, screenOpacity.value), 0xFFFF)
+    g.setTextSize(2)
+    g.drawCenterString("Testing", math.floor(width / 2), math.floor(height / 2) - 15)
+end
+
+function init()
+    -- Draw once on boot
+    screen = "welcome"
+    dirty = true
+end
+
+function tick(dt)
+    local pressed = keyboard.isPressed() > 0
+
+    -- Don't accept input until we see a clean "no keys pressed" state at least once.
+    if not inputArmed then
+        if not pressed then
+            inputArmed = true
+        end
+        wasPressed = pressed
+        return
+    end
+
+    local justPressed = pressed and (not wasPressed)
+    wasPressed = pressed
+
+    if screen == "welcome" and justPressed and (not transitioning) then
+        transitioning = true
+
+        -- Ensure we don't stack multiple tweens/timers for the same property.
+        a:clear()
+        screenOpacity.value = 1
+
+        a:to(screenOpacity, { value = 0 }, 1, {
+            ease = anim.ease.outCubic,
+            onComplete = function()
+                screen = "testing"
+                dirty = true
+                a:to(screenOpacity, { value = 1 }, 1, {
+                    ease = anim.ease.outCubic,
+                    onComplete = function()
+                        transitioning = false
+                        dirty = true
+                    end
+                })
+            end
+        })
+        dirty = true
+    end
+
+    -- Advance animations at a fixed timestep to avoid redrawing "too fast" for the display.
+    if type(dt) == "number" and dt > 0 then
+        acc = acc + dt
+        if acc > 0.25 then acc = 0.25 end -- prevent spiral-of-death on long frames
+
+        local changed = false
+        while acc >= STEP do
+            if a:update(STEP) then changed = true end
+            acc = acc - STEP
+        end
+        if changed then dirty = true end
+    end
+end
+
+function draw()
+    if not dirty then return end
+    dirty = false
+
+    if screen == "welcome" then
+        drawWelcome()
+        buf.present()
+        return
+    end
+
+    drawTesting()
+    buf.present()
+end