feat: enhance shader

packages/pixel-profile/src/shaders/curve.ts

@@ -1,5 +1,5 @@
 import type { Coordinates, Vec2 } from '../utils'
-import { dot2, prod2, render, subtract2 } from '../utils'
+import { add2, dot2, prod2, render, subtract2 } from '../utils'
 
 const margin = [0, 0]
 const screenCurvature = 0.1
@@ -13,7 +13,7 @@ export function curve(source: Buffer, width: number, height: number): Buffer {
       cc[0] = cc[0] * temp
       cc[1] = cc[1] * temp
 
-      return [coords[0] + cc[0], coords[1] + cc[1]]
+      return add2(coords, cc)
     }
 
     const coords = distortCoordinates(uv)

packages/pixel-profile/src/utils/index.ts

@@ -1,5 +1,5 @@
 export { getBase64FromPixels, getPixelsFromPngBuffer, getPngBufferFromPixels } from './converter'
-export { clamp, dot2, kFormatter, prod2, subtract2, type Vec2 } from './math'
+export { add2, clamp, dot2, kFormatter, prod2, subtract2, type Vec2 } from './math'
 export { type Rank, rank } from './rank'
 export { type Coordinates, render } from './renderer'
 export { request } from './request'

packages/pixel-profile/src/utils/math.ts

@@ -10,6 +10,10 @@ export function kFormatter(num: number): string {
     : `${Math.sign(num) * Math.abs(num)}`
 }
 
+export function add2(a: Vec2, b: Vec2): Vec2 {
+  return [a[0] + b[0], a[1] + b[1]]
+}
+
 export function dot2(a: Vec2, b: Vec2): number {
   return a[0] * b[0] + a[1] * b[1]
 }