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Original file line number | Diff line number | Diff line change |
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import heic2any from "heic2any"; | ||
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export function compressImage(file: File, maxSize: number): Promise<string> { | ||
return new Promise((resolve, reject) => { | ||
const reader = new FileReader(); | ||
reader.onload = (readerEvent: any) => { | ||
const image = new Image(); | ||
image.onload = () => { | ||
let canvas = document.createElement("canvas"); | ||
let ctx = canvas.getContext("2d"); | ||
let width = image.width; | ||
let height = image.height; | ||
let quality = 0.9; | ||
let dataUrl; | ||
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do { | ||
canvas.width = width; | ||
canvas.height = height; | ||
ctx?.clearRect(0, 0, canvas.width, canvas.height); | ||
ctx?.drawImage(image, 0, 0, width, height); | ||
dataUrl = canvas.toDataURL("image/jpeg", quality); | ||
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if (dataUrl.length < maxSize) break; | ||
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if (quality > 0.5) { | ||
// Prioritize quality reduction | ||
quality -= 0.1; | ||
} else { | ||
// Then reduce the size | ||
width *= 0.9; | ||
height *= 0.9; | ||
} | ||
} while (dataUrl.length > maxSize); | ||
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resolve(dataUrl); | ||
}; | ||
image.onerror = reject; | ||
image.src = readerEvent.target.result; | ||
}; | ||
reader.onerror = reject; | ||
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if (file.type.includes("heic")) { | ||
heic2any({ blob: file, toType: "image/jpeg" }) | ||
.then((blob) => { | ||
reader.readAsDataURL(blob as Blob); | ||
}) | ||
.catch((e) => { | ||
reject(e); | ||
}); | ||
} | ||
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reader.readAsDataURL(file); | ||
}); | ||
} |
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