accept a list of pixels in the SWITCH TO COSTUME block

thanks, @DyslexicAwe for the idea!

HISTORY.md

@@ -3,6 +3,7 @@
 ## in development:
 * **New Features:**
     * new cloud-menu entry: "Open in Community Site", thanks, Michael!
+    * accept a list of pixels in the SWITCH TO COSTUME block
 * **Notable Changes:**
 * **Notable Fixes:**
     * morphic collision detection off-by-1 fix, thanks, Dariusz!
@@ -14,6 +15,9 @@
     * Galician, thanks, Bernat
     * Turkish, thanks, Turgut!
 
+### 2019-10-11
+* objects, threads: accept a list of pixels in the SWITCH TO COSTUME block
+
 ### 2019-10-09
 * new dev version
 * morphic: collision detection off-by-1 fix, thanks, @DarDoro

snap.html

@@ -7,8 +7,8 @@
         <script type="text/javascript" src="src/morphic.js?version=2019-08-06"></script>
         <script type="text/javascript" src="src/widgets.js?version=2019-06-27"></script>
         <script type="text/javascript" src="src/blocks.js?version=2019-08-07"></script>
-        <script type="text/javascript" src="src/threads.js?version=2019-08-07"></script>
-        <script type="text/javascript" src="src/objects.js?version=2019-08-08"></script>
+        <script type="text/javascript" src="src/threads.js?version=2019-10-11"></script>
+        <script type="text/javascript" src="src/objects.js?version=2019-10-11"></script>
         <script type="text/javascript" src="src/gui.js?version=2019-10-09"></script>
         <script type="text/javascript" src="src/paint.js?version=2019-06-27"></script>
         <script type="text/javascript" src="src/lists.js?version=2019-07-01"></script>

src/objects.js

@@ -84,7 +84,7 @@ BlockEditorMorph, BlockDialogMorph, PrototypeHatBlockMorph,  BooleanSlotMorph,
 localize, TableMorph, TableFrameMorph, normalizeCanvas, VectorPaintEditorMorph,
 HandleMorph, AlignmentMorph, Process, XML_Element, WorldMap*/
 
-modules.objects = '2019-August-08';
+modules.objects = '2019-October-11';
 
 var SpriteMorph;
 var StageMorph;
@@ -3516,6 +3516,24 @@ SpriteMorph.prototype.doWearPreviousCostume = function () {
 };
 
 SpriteMorph.prototype.doSwitchToCostume = function (id, noShadow) {
+    var w, h;
+    if (id instanceof List) { // try to turn a list of pixels into a costume
+        if (this.costume) {
+            // recycle dimensions of current costume
+            w = this.costume.width();
+            h = this.costume.height();
+        } else {
+            // assume stage's dimensions
+            w = StageMorph.prototype.dimensions.x;
+            h = StageMorph.prototype.dimensions.y;
+        }
+        id = Process.prototype.reportNewCostume(
+            id,
+            w,
+            h,
+            this.newCostumeName(localize('snap'))
+        );
+    }
     if (id instanceof Costume) { // allow first-class costumes
         this.wearCostume(id, noShadow);
         return;

src/threads.js

@@ -61,7 +61,7 @@ StageMorph, SpriteMorph, StagePrompterMorph, Note, modules, isString, copy,
 isNil, WatcherMorph, List, ListWatcherMorph, alert, console, TableMorph, Color,
 TableFrameMorph, ColorSlotMorph, isSnapObject, Map, newCanvas, Symbol*/
 
-modules.threads = '2019-August-07';
+modules.threads = '2019-October-11';
 
 var ThreadManager;
 var Process;
@@ -4933,7 +4933,7 @@ Process.prototype.costumeNamed = function (name) {
     );
 };
 
-Process.prototype.reportNewCostume = function (pixels, width, height) {
+Process.prototype.reportNewCostume = function (pixels, width, height, name) {
     // private
     width = Math.abs(Math.floor(+width));
     height = Math.abs(Math.floor(+height));
@@ -4953,7 +4953,7 @@ Process.prototype.reportNewCostume = function (pixels, width, height) {
     ctx.putImageData(dta, 0, 0);
     return new Costume(
         canvas,
-        this.blockReceiver().newCostumeName(localize('snap'))
+        name || this.blockReceiver().newCostumeName(localize('snap'))
     );
 };