Initial commit: Receipt Studio desktop application

tests/png.test.ts

@@ -0,0 +1,11 @@
+import {it,expect} from 'vitest'
+import {withPngDensity} from '../src/main/png-density'
+// A small valid PNG; injecting resolution must not change its image payload.
+const source=Buffer.from('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+jvF8AAAAASUVORK5CYII=','base64')
+it('PNG 带有实际 300 DPI 分辨率且可重复更新',()=>{
+ const png=withPngDensity(source,300),index=png.indexOf('pHYs')
+ expect(png.readUInt32BE(index+4)).toBe(11811);expect(png.readUInt32BE(index+8)).toBe(11811)
+ const second=withPngDensity(png,150)
+ expect(second.toString('latin1').split('pHYs')).toHaveLength(2)
+ expect(second.readUInt32BE(second.indexOf('pHYs')+4)).toBe(5906)
+})