minimap: only update and render when needed

src/net/torvald/terrarum/blockstats/MinimapComposer.kt

@@ -46,8 +46,8 @@ object MinimapComposer {
     var topLeftCoordY = 0
 
     const val LIVETILE_SIZE = 64
-    const val DISPLAY_CANVAS_WIDTH = 2048
-    const val DISPLAY_CANVAS_HEIGHT = 1024
+    const val DISPLAY_CANVAS_WIDTH = 2048 // must be divisible by LIVETILE_SIZE
+    const val DISPLAY_CANVAS_HEIGHT = 1024 // must be divisible by LIVETILE_SIZE
     val minimap = Pixmap(DISPLAY_CANVAS_WIDTH, DISPLAY_CANVAS_HEIGHT, Pixmap.Format.RGBA8888)
     const val TILES_IN_X = DISPLAY_CANVAS_WIDTH / LIVETILE_SIZE
     const val TILES_IN_Y = DISPLAY_CANVAS_HEIGHT / LIVETILE_SIZE
@@ -96,12 +96,30 @@ object MinimapComposer {
         // TODO
 
     }
+    fun revalidateAll() {
+        liveTilesMeta.forEach { it.revalidate = true }
+    }
+
+    private var rerender = true
+
+    /**
+     * When to call:
+     * - every 5 seconds or so
+     * - every .5 seconds for 10 seconds after the tilemap changed
+     */
+    fun requestRender() {
+        printdbg(this, "Rerender requested")
+        rerender = true
+    }
 
     fun renderToBackground() {
-        for (y in 0 until TILES_IN_Y) {
-            for (x in 0 until TILES_IN_X) {
-                minimap.drawPixmap(liveTiles[tilemap[y][x]], x * LIVETILE_SIZE, y * LIVETILE_SIZE)
+        if (rerender) {
+            for (y in 0 until TILES_IN_Y) {
+                for (x in 0 until TILES_IN_X) {
+                    minimap.drawPixmap(liveTiles[tilemap[y][x]], x * LIVETILE_SIZE, y * LIVETILE_SIZE)
+                }
             }
+            rerender = false
         }
     }
 

src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt

@@ -220,6 +220,8 @@ class UIInventoryFull(
             MinimapComposer.setWorld(Terrarum.ingame!!.world)
             MinimapComposer.update()
         }
+
+        minimapRerenderTimer += Gdx.graphics.rawDeltaTime
     }
 
     private val gradStartCol = Color(0x404040_60)
@@ -232,6 +234,9 @@ class UIInventoryFull(
     private var xEnd = (Terrarum.WIDTH + internalWidth).div(2).toFloat()
     private var yEnd = (Terrarum.HEIGHT + internalHeight).div(2).toFloat()
 
+    private var minimapRerenderTimer = 0f
+    private val minimapRerenderInterval = .5f
+
     fun requestTransition(target: Int) {
         if (!transitionOngoing) {
             transitionRequested = true
@@ -398,12 +403,18 @@ class UIInventoryFull(
         // render minimap
         batch.end()
 
+        if (minimapRerenderTimer >= minimapRerenderInterval) {
+            minimapRerenderTimer = 0f
+            MinimapComposer.requestRender()
+        }
+
         MinimapComposer.renderToBackground()
 
         minimapFBO.inAction(minimapCamera, batch) {
             // whatever.
             MinimapComposer.tempTex.dispose()
             MinimapComposer.tempTex = Texture(MinimapComposer.minimap)
+            MinimapComposer.tempTex.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Nearest)
 
             batch.inUse {
 
@@ -545,6 +556,8 @@ class UIInventoryFull(
 
     override fun endClosing(delta: Float) {
         (Terrarum.ingame as? Ingame)?.setTooltipMessage(null) // required!
+
+        MinimapComposer.revalidateAll()
     }