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| export function bytesFromCanvas( | |
| canvas: HTMLCanvasElement | |
| ): Promise<Uint8Array | null> { | |
| return new Promise<Uint8Array>((resolve, reject) => { | |
| canvas.toBlob((blob) => { | |
| if (!blob) throw new Error("Blob does not exist"); | |
| const reader = new FileReader(); | |
| reader.onload = () => { | |
| if (!reader.result) { | |
| throw new Error("Reader result does not exist"); | |
| } | |
| resolve(new Uint8Array(reader.result as ArrayBuffer)); | |
| }; | |
| reader.onerror = () => reject(new Error("Could not read from blob")); | |
| reader.readAsArrayBuffer(blob); | |
| }); | |
| }); | |
| } |
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