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import { GenerativeFillMathHelpers } from './GenerativeFillMathHelpers';
import { eraserColor } from './generativeFillConstants';
import { Point } from './generativeFillInterfaces';
export class BrushHandler {
static brushCircle = (x: number, y: number, brushRadius: number, ctx: CanvasRenderingContext2D) => {
ctx.globalCompositeOperation = 'destination-out';
ctx.shadowColor = '#ffffffeb';
ctx.shadowBlur = 5;
ctx.beginPath();
ctx.arc(x, y, brushRadius, 0, 2 * Math.PI);
ctx.fill();
ctx.closePath();
};
static brushCircleOverlay = (x: number, y: number, brushRadius: number, ctx: CanvasRenderingContext2D, fillColor: string, erase: boolean) => {
ctx.globalCompositeOperation = 'destination-out';
// ctx.globalCompositeOperation = erase ? "destination-out" : "source-over";
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 createBrushPath = (startPoint: Point, endPoint: Point, brushRadius: number, ctx: CanvasRenderingContext2D) => {
const dist = GenerativeFillMathHelpers.distanceBetween(startPoint, endPoint);
for (let i = 0; i < dist; i += 5) {
const s = i / dist;
BrushHandler.brushCircle(startPoint.x * (1 - s) + endPoint.x * s, startPoint.y * (1 - s) + endPoint.y * s, brushRadius, ctx);
}
};
static createBrushPathOverlay = (startPoint: Point, endPoint: Point, brushRadius: number, ctx: CanvasRenderingContext2D, fillColor: string, erase: boolean) => {
const dist = GenerativeFillMathHelpers.distanceBetween(startPoint, endPoint);
for (let i = 0; i < dist; i += 5) {
const s = i / dist;
BrushHandler.brushCircleOverlay(startPoint.x * (1 - s) + endPoint.x * s, startPoint.y * (1 - s) + endPoint.y * s, brushRadius, ctx, fillColor, erase);
}
};
}
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