94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
package main
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import (
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"errors"
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"os"
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"runtime"
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"github.com/golang/freetype"
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"github.com/golang/freetype/truetype"
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"golang.org/x/image/font/gofont/goregular"
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)
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// collectFontCandidates 收集常见中文字体路径，允许用 DOUYU_FONT 指定自定义字体。
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func collectFontCandidates() []string {
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candidates := []string{}
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if custom := os.Getenv("DOUYU_FONT"); custom != "" {
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candidates = append(candidates, custom)
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}
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candidates = append(candidates,
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"Microsoft Yahei.ttf",
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"Microsoft YaHei.ttf",
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"NotoSansCJKsc-Regular.otf",
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"NotoSansCJK-Regular.ttc",
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)
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switch runtime.GOOS {
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case "darwin":
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candidates = append(candidates,
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"/System/Library/Fonts/PingFang.ttc",
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"/System/Library/Fonts/Supplemental/Arial Unicode.ttf",
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"/System/Library/Fonts/Supplemental/Songti.ttc",
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)
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case "windows":
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candidates = append(candidates,
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`C:\Windows\Fonts\msyh.ttc`,
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`C:\Windows\Fonts\simhei.ttf`,
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`C:\Windows\Fonts\simsun.ttc`,
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)
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default:
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candidates = append(candidates,
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"/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc",
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"/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.otf",
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"/usr/share/fonts/truetype/noto/NotoSansCJK-Regular.ttc",
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"/usr/share/fonts/truetype/wqy/wqy-microhei.ttc",
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"/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf",
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)
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}
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return candidates
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}
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// loadFont 预加载字体，优先使用本地或系统中文字体，缺失时使用内置字体兜底。
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func (s *appState) loadFont() {
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s.fontMu.Lock()
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defer s.fontMu.Unlock()
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source, font, err := parseFirstFont(s.paths.FontFiles)
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if err != nil {
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source = "内置 Go Regular 字体"
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font, err = freetype.ParseFont(goregular.TTF)
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if err != nil {
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logEvent("字体", "error", "内置字体解析失败，成功图片功能将跳过: %v", err)
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return
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}
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logEvent("字体", "warn", "未找到可用系统字体，使用内置字体兜底，中文可能显示不完整")
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}
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s.font = font
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logEvent("字体", "success", "字体加载完成: %s", source)
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}
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func parseFirstFont(candidates []string) (string, *truetype.Font, error) {
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for _, path := range candidates {
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if path == "" {
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continue
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}
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fontBytes, err := os.ReadFile(path)
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if err != nil {
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if !errors.Is(err, os.ErrNotExist) {
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logEvent("字体", "warn", "字体读取失败，已跳过: %s: %v", path, err)
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}
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continue
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}
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if len(fontBytes) == 0 {
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continue
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}
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font, err := freetype.ParseFont(fontBytes)
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if err != nil {
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logEvent("字体", "warn", "字体解析失败，已跳过: %s: %v", path, err)
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continue
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}
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return path, font, nil
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}
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return "", nil, errors.New("没有可用字体")
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}
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