mesalogo
12463ad593
The primary sidebar brand was fixed to the built-in name, subtitle, and logo. Appearance settings now let users preview and save a custom brand name, localized Chinese and English subtitles, and a validated local PNG, JPEG, or WebP logo, with default-logo and full-reset actions. Customization remains device-local and limited to the top-left brand area; installer, update, Agent, and protocol identities remain GoodBuddy. The desktop package version is now 0.11.6. Release note: 新增“外观 → 品牌定制”，可修改左上角品牌名称、中英文副标题和本地 Logo，并支持实时预览、恢复默认及本机持久化。
45 lines
1022 B
TypeScript
45 lines
1022 B
TypeScript
export type SupportedImageFormat = {
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extension: 'jpg' | 'png' | 'webp'
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mimeType: 'image/jpeg' | 'image/png' | 'image/webp'
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}
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function matchesAscii(
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data: Uint8Array,
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offset: number,
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value: string
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): boolean {
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return [...value].every(
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(character, index) =>
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data[offset + index] === character.charCodeAt(0)
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)
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}
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export function detectSupportedImage(
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data: Uint8Array
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): SupportedImageFormat {
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if (
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data.byteLength >= 3 &&
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data[0] === 0xff &&
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data[1] === 0xd8 &&
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data[2] === 0xff
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) {
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return { extension: 'jpg', mimeType: 'image/jpeg' }
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}
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if (
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data.byteLength >= 8 &&
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[0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a].every(
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(value, index) => data[index] === value
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)
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) {
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return { extension: 'png', mimeType: 'image/png' }
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}
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if (
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data.byteLength >= 12 &&
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matchesAscii(data, 0, 'RIFF') &&
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matchesAscii(data, 8, 'WEBP')
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) {
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return { extension: 'webp', mimeType: 'image/webp' }
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}
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throw new Error('图片格式不受支持')
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}
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