| 913 | } |
| 914 | |
| 915 | function centerOfFirstRoot(payload) { |
| 916 | const frame = payload?.roots?.[0]?.frame; |
| 917 | if (!frame || typeof frame !== "object") { |
| 918 | return null; |
| 919 | } |
| 920 | const x = Number( |
| 921 | Array.isArray(frame) ? frame[0] : (frame.x ?? frame.minX ?? 0), |
| 922 | ); |
| 923 | const y = Number( |
| 924 | Array.isArray(frame) ? frame[1] : (frame.y ?? frame.minY ?? 0), |
| 925 | ); |
| 926 | const width = Number(Array.isArray(frame) ? frame[2] : (frame.width ?? 0)); |
| 927 | const height = Number(Array.isArray(frame) ? frame[3] : (frame.height ?? 0)); |
| 928 | if ( |
| 929 | !Number.isFinite(width) || |
| 930 | !Number.isFinite(height) || |
| 931 | width <= 0 || |
| 932 | height <= 0 |
| 933 | ) { |
| 934 | return null; |
| 935 | } |
| 936 | return { |
| 937 | x: Math.round(x + width / 2), |
| 938 | y: Math.round(y + height / 2), |
| 939 | }; |
| 940 | } |
| 941 | |
| 942 | function assertPngBuffer(buffer) { |
| 943 | const signature = Buffer.from([ |