From 242eda245b4a3de72ef18482a5256a41bd95debf Mon Sep 17 00:00:00 2001
From: Gordon Williams <gw@pur3.co.uk>
Date: Fri, 25 Oct 2024 09:38:00 +0100
Subject: [PATCH] clockbg 0.06: 25% speed improvement if Math.randInt exists
 (2v25 fw)

---
 apps/clockbg/ChangeLog     | 3 ++-
 apps/clockbg/lib.js        | 8 ++++++--
 apps/clockbg/metadata.json | 2 +-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/apps/clockbg/ChangeLog b/apps/clockbg/ChangeLog
index 3c681a638..a370befc0 100644
--- a/apps/clockbg/ChangeLog
+++ b/apps/clockbg/ChangeLog
@@ -4,4 +4,5 @@
 0.04: More options for different background colors
       'Plasma' generative background
       Add a 'view' option in settings menu to view the current background
-0.05: Random square+plasma speed improvements (~2x faster)
\ No newline at end of file
+0.05: Random square+plasma speed improvements (~2x faster)
+0.06: 25% speed improvement if Math.randInt exists (2v25 fw)
\ No newline at end of file
diff --git a/apps/clockbg/lib.js b/apps/clockbg/lib.js
index 59345340f..256f2f372 100644
--- a/apps/clockbg/lib.js
+++ b/apps/clockbg/lib.js
@@ -1,6 +1,7 @@
 let settings;
 
 exports.reload = function() {
+  //let t = Date.now();
   settings = Object.assign({
     style : "randomcolor",
     colors : ["#F00","#0F0","#00F"]
@@ -17,7 +18,8 @@ exports.reload = function() {
     let bpp = (settings.colors.length>4)?4:2;
     let bg = Graphics.createArrayBuffer(11,11,bpp,{msb:true});
     let u32 = new Uint32Array(bg.buffer); // faster to do 1/4 of the ops of E.mapInPlace(bg.buffer, bg.buffer, ()=>Math.random()*256);
-    E.mapInPlace(u32, u32, function(r,n){"ram";return r()*n}.bind(null,Math.random,0x100000000)); // random pixels
+    if (Math.randInt) E.mapInPlace(u32, u32, Math.randInt); // random pixels
+    else E.mapInPlace(u32, u32, function(r,n){"ram";return r()*n}.bind(null,Math.random,0x100000000)); // random pixels
     bg.buffer[bg.buffer.length-1]=Math.random()*256; // 11x11 isn't a multiple of 4 bytes - we need to set the last one!
     bg.palette = new Uint16Array(1<<bpp);
     bg.palette.set(settings.colors.map(c=>g.toColor(c)));
@@ -28,7 +30,8 @@ exports.reload = function() {
     settings.style = "image";
     let bg = Graphics.createArrayBuffer(16,16,4,{msb:true});
     let u32 = new Uint32Array(bg.buffer); // faster to do 1/4 of the ops of E.mapInPlace(bg.buffer, bg.buffer, ()=>Math.random()*256);
-    E.mapInPlace(u32, u32, function(r,n){"ram";return r()*n}.bind(null,Math.random,0x100000000)); // random pixels
+    if (Math.randInt) E.mapInPlace(u32, u32, Math.randInt); // random pixels
+    else E.mapInPlace(u32, u32, function(r,n){"ram";return r()*n}.bind(null,Math.random,0x100000000)); // random pixels
     bg.filter([ // a gaussian filter to smooth out
         1, 4, 7, 4, 1,
         4,16,26,16, 4,
@@ -42,6 +45,7 @@ exports.reload = function() {
     settings.imgOpt = {scale:11};
     delete settings.colors;
   }
+  //console.log("bg",Date.now()-t);
 };
 exports.reload();
 
diff --git a/apps/clockbg/metadata.json b/apps/clockbg/metadata.json
index 85b1f8a5a..ba6fb6712 100644
--- a/apps/clockbg/metadata.json
+++ b/apps/clockbg/metadata.json
@@ -1,7 +1,7 @@
 { "id": "clockbg",
   "name": "Clock Backgrounds",
   "shortName":"Backgrounds",
-  "version": "0.05",
+  "version": "0.06",
   "description": "Library that allows clocks to include a custom background (generated on demand or uploaded).",
   "icon": "app.png",
   "screenshots": [{"url":"screenshot.png"},{"url":"screenshot2.png"},{"url":"screenshot3.png"}],