From 7b43a5736f26ae6e104821365a9e011331da1211 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Fri, 1 Jan 2021 11:55:49 -0500
Subject: [PATCH] skip renderning when using engine api

---
 src/kiri/engine.js      |  1 +
 src/mode/fdm/prepare.js | 12 ++++++++----
 src/mode/fdm/slice.js   | 14 +++++++++-----
 3 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/src/kiri/engine.js b/src/kiri/engine.js
index db058ee5..b27b6744 100644
--- a/src/kiri/engine.js
+++ b/src/kiri/engine.js
@@ -13,6 +13,7 @@ class Engine {
         this.settings = {
             mode: "FDM",
             controller: {},
+            internal: true,
             filter: { FDM: "internal" },
             device: KIRI.conf.defaults.fdm.d, // device profile
             process: KIRI.conf.defaults.fdm.p, // slicing settings
diff --git a/src/mode/fdm/prepare.js b/src/mode/fdm/prepare.js
index 9164476e..e67b6b18 100644
--- a/src/mode/fdm/prepare.js
+++ b/src/mode/fdm/prepare.js
@@ -395,10 +395,14 @@
         }
 
         print.output = output;
-        print.render = FDM.prepareRender(output, (progress, layer) => {
-            update(0.5 + progress * 0.5, "render", layer);
-        }, { tools: device.extruders, thin: isThin, flat: isFlat, fdm: true });
-        return print.render;
+
+        // render when not internal (engine api)
+        if (!settings.internal) {
+            print.render = FDM.prepareRender(output, (progress, layer) => {
+                update(0.5 + progress * 0.5, "render", layer);
+            }, { tools: device.extruders, thin: isThin, flat: isFlat, fdm: true });
+            return print.render;
+        }
     };
 
     class Counter {
diff --git a/src/mode/fdm/slice.js b/src/mode/fdm/slice.js
index df007d4d..6be39d02 100644
--- a/src/mode/fdm/slice.js
+++ b/src/mode/fdm/slice.js
@@ -56,7 +56,8 @@
      */
     FDM.slice = function(settings, widget, onupdate, ondone) {
         FDM.fixExtruders(settings);
-        let spro = settings.process,
+        let render = !settings.internal,
+            spro = settings.process,
             sdev = settings.device,
             update_start = Date.now(),
             minSolid = spro.sliceSolidMinArea,
@@ -258,9 +259,12 @@
                 }, "support");
             }
 
-            forSlices(0.9, 1.0, function(slice) {
-                doRender(slice);
-            }, "render");
+            // skip rendering in api-only mode
+            if (render) {
+                forSlices(0.9, 1.0, function(slice) {
+                    doRender(slice);
+                }, "render");
+            }
 
             // report slicing complete
             ondone();
@@ -323,7 +327,7 @@
             if (poly.fill) output
                 .setLayer("support", COLOR.support)
                 .addLines(poly.fill, vopt({ offset, height }));
-        })
+        });
 
         // if (isThin && debug) {
         //     output