38565382c3
- Implemented feather brush tool in the brushRaster module, allowing for feathered edges in brush strokes. - Added new FeatherControls component for UI adjustments of feather settings including size, radius, strength, and smoothing. - Updated brush preview logic to accommodate feather tool alongside existing brush and eraser tools. - Enhanced layer rendering to support feather mask previews and interactions. - Introduced blending logic for feathered strokes to mix blurred mask values with original pixels. - Added unit tests for feather blending functionality and tool keybindings. - Updated cursor handling to reflect feather tool usage.
41 lines
1.2 KiB
TypeScript
41 lines
1.2 KiB
TypeScript
import { describe, expect, test } from "bun:test";
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import { blendFeatherPatch } from "./brushRaster";
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describe("feather brush raster blending", () => {
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test("mixes blurred mask values inside the stroke and preserves pixels outside it", () => {
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const original = rgbaRow([255, 255, 255, 255, 255]);
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const blurred = rgbaRow([0, 64, 128, 192, 255]);
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blendFeatherPatch(original, blurred, 5, 1, { x: 0, y: 0 }, {
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from: { x: 2.5, y: 0.5 },
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to: { x: 2.5, y: 0.5 },
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size: 3,
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strength: 100,
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});
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expect(alphaValues(original)).toEqual([255, 64, 128, 192, 255]);
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});
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test("applies strength as a non-destructive mix", () => {
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const original = rgbaRow([255]);
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const blurred = rgbaRow([0]);
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blendFeatherPatch(original, blurred, 1, 1, { x: 0, y: 0 }, {
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from: { x: 0.5, y: 0.5 },
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to: { x: 0.5, y: 0.5 },
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size: 10,
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strength: 50,
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});
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expect(alphaValues(original)).toEqual([128]);
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});
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});
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function rgbaRow(alpha: number[]) {
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return new Uint8ClampedArray(alpha.flatMap((value) => [255, 255, 255, value]));
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}
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function alphaValues(data: Uint8ClampedArray) {
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return Array.from({ length: data.length / 4 }, (_, index) => data[index * 4 + 3]);
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}
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