feat: maxUndos capacity

Author: HarshKhandeparkar

dist/gpujs-real-renderer-browser.js

@@ -1011,6 +1011,7 @@
 	    brushSize: 1,
 	    eraserSize: 2,
 	    brushColor: [1, 1, 1],
+	    maxUndos: 15,
 	    mode: 'paint'
 	};
 	});
@@ -1164,6 +1165,10 @@
 	    this._plot.apply(this, endCoords);
 	    this._lastCoords.delete(identifier);
 	    this._snapshots[++this._currentSnapshotIndex] = this.getData();
+	    if (this._snapshots.length > this._maxSnapshots) {
+	        this._snapshots.shift();
+	        this._currentSnapshotIndex--;
+	    }
 	}
 	exports._endStroke = _endStroke;
 	function _doStroke(coords, identifier) {
@@ -1334,6 +1339,7 @@
 	        _this.brushSize = options.brushSize;
 	        _this.brushColor = options.brushColor;
 	        _this.eraserSize = options.eraserSize;
+	        _this._maxSnapshots = Math.max(options.maxUndos, 1);
 	        _this.mode = options.mode;
 	        // *****DEFAULTS*****
 	        _this._initializeKernels();

dist/gpujs-real-renderer-browser.min.js

@@ -4,5 +4,6 @@ export const RealDrawBoardDefaults: RealDrawBoardOptions = {
   brushSize: 1,
   eraserSize: 2,
   brushColor: [1, 1, 1],
+  maxUndos: 15,
   mode: 'paint'
 }

src/constants/defaults/RealDrawBoardDefaults.ts

@@ -4,7 +4,7 @@ import { Color } from '../../types/RealRendererTypes';
 import { RealDrawBoardOptions, DrawMode } from '../../types/RealDrawBoardTypes';
 import { RealDrawBoardDefaults } from '../../constants/defaults/RealDrawBoardDefaults';
 
-import { IKernelRunShortcut, Texture } from 'gpu.js';
+import { IKernelRunShortcut } from 'gpu.js';
 
 export * as RealRendererTypes from '../../types/RealRendererTypes';
 export * as RealDrawBoardTypes from '../../types/RealDrawBoardTypes';
@@ -44,6 +44,7 @@ export class RealDrawBoard extends RealRenderer {
   _isDrawing: boolean = false;
   _snapshots: number[][] = []; // Undo snapshots
   _currentSnapshotIndex = 0; // Current snapshot
+  _maxSnapshots: number;
   _plotKernel: IKernelRunShortcut;
   _previewPlot: IKernelRunShortcut;
   _strokeKernel: IKernelRunShortcut;
@@ -87,6 +88,7 @@ export class RealDrawBoard extends RealRenderer {
     this.brushColor = options.brushColor;
 
     this.eraserSize = options.eraserSize;
+    this._maxSnapshots = Math.max(options.maxUndos, 1);
 
     this.mode = options.mode;
     // *****DEFAULTS*****

src/renderers/RealDrawBoard/RealDrawBoard.ts

@@ -21,6 +21,10 @@ export function _endStroke(
   this._lastCoords.delete(identifier);
 
   this._snapshots[++this._currentSnapshotIndex] = this.getData();
+  if (this._snapshots.length > this._maxSnapshots) {
+    this._snapshots.shift();
+    this._currentSnapshotIndex--;
+  }
 }
 
 export function _doStroke(

src/renderers/RealDrawBoard/stroke.ts

@@ -6,5 +6,6 @@ export interface RealDrawBoardOptions extends RealRendererOptions {
   brushSize?: number,
   brushColor?: Color,
   eraserSize?: number,
+  maxUndos?: number,
   mode?: 'paint' | 'erase'
 }