Merge branch 'master' into alyssa-starter

1 files changed, 29 insertions, 0 deletions

diff --git a/src/client/views/nodes/imageEditor/imageEditorUtils/BrushHandler.ts b/src/client/views/nodes/imageEditor/imageEditorUtils/BrushHandler.ts
new file mode 100644
index 000000000..ed39375e0
--- /dev/null
+++ b/src/client/views/nodes/imageEditor/imageEditorUtils/BrushHandler.ts
@@ -0,0 +1,29 @@
+import { GenerativeFillMathHelpers } from './GenerativeFillMathHelpers';
+import { eraserColor } from './imageEditorConstants';
+import { Point } from './imageEditorInterfaces';
+
+export class BrushHandler {
+    static brushCircleOverlay = (x: number, y: number, brushRadius: number, ctx: CanvasRenderingContext2D, fillColor: string /* , erase: boolean */) => {
+        ctx.globalCompositeOperation = 'destination-out';
+        ctx.fillStyle = fillColor;
+        ctx.shadowColor = eraserColor;
+        ctx.shadowBlur = 5;
+        ctx.beginPath();
+        ctx.arc(x, y, brushRadius, 0, 2 * Math.PI);
+        ctx.fill();
+        ctx.closePath();
+    };
+
+    static createBrushPathOverlay = (startPoint: Point, endPoint: Point, brushRadius: number, ctx: CanvasRenderingContext2D, fillColor: string) => {
+        const dist = GenerativeFillMathHelpers.distanceBetween(startPoint, endPoint);
+        const pts: Point[] = [];
+        for (let i = 0; i < dist; i += 5) {
+            const s = i / dist;
+            const x = startPoint.x * (1 - s) + endPoint.x * s;
+            const y = startPoint.y * (1 - s) + endPoint.y * s;
+            pts.push({ x: startPoint.x, y: startPoint.y });
+            BrushHandler.brushCircleOverlay(x, y, brushRadius, ctx, fillColor);
+        }
+        return pts;
+    };
+}