22 lines
695 B
JavaScript
22 lines
695 B
JavaScript
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export function compressBase64Image(base64Image, compressionRatio) {
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return new Promise((resolve, reject) => {
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const img = new Image();
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img.src = base64Image;
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img.onload = function() {
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const canvas = document.createElement('canvas');
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canvas.width = img.width * compressionRatio;
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canvas.height = img.height * compressionRatio;
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const ctx = canvas.getContext('2d');
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ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
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// 将Canvas上的图像转换为PNG格式的Base64
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const compressedBase64 = canvas.toDataURL('image/png', 1);
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resolve(compressedBase64);
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};
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img.onerror = function() {
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reject("无法加载图像");
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};
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});
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}
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