mirror of
https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 08:46:55 +08:00
70 lines
2.6 KiB
Go
70 lines
2.6 KiB
Go
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ofdgo
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import (
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"fmt"
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"unicode/utf8"
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basefont "github.com/xiaoqidun/ofdgo/internal/base/font"
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)
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// FontFace 字体文件中的字体名称与零起始索引，不依赖文件名
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type FontFace = basefont.Face
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// FixFontDataAggressive 激进修复字体数据
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// 尝试修复缺失表(OS/2, cmap等)的TrueType字体或包装CFF裸数据
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// 对显式字形映射补充私有字符cmap，便于按glyph id渲染
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// 入参: data 原始字体数据, fixCmap 是否修复cmap, fixName 是否修复name
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// 返回: bool 是否修复, []byte 修复后数据, map[rune]uint16 字符映射, bool 是否缺失cmap, error 错误信息
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func FixFontDataAggressive(data []byte, fixCmap, fixName bool) (bool, []byte, map[rune]uint16, bool, error) {
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return basefont.FixDataAggressive(data, fixCmap, fixName)
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}
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// Faces 读取字体名称表，集合文件按原顺序列出各项，不解析字形轮廓
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// 返回: []FontFace 字体列表, error 格式或名称表错误
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func (f FontFile) Faces() ([]FontFace, error) {
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data, err := decodeFontContainer(f.Data)
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if err != nil {
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return nil, err
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}
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return basefont.ReadFaces(data)
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}
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// Face 提取指定字体，返回独立的OpenType数据，可用于预览或AddFont，且不修改原文件
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// 入参: index 零起始字体索引，非集合文件只能为0
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// 返回: []byte 独立字体数据, error 格式或索引错误
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func (f FontFile) Face(index int) ([]byte, error) {
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data, err := decodeFontContainer(f.Data)
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if err != nil {
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return nil, err
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}
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return basefont.ExtractFace(data, index)
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}
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// MissingGlyphs 检查指定字体的字符覆盖，不注册资源或修改文档，忽略段落换行
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// 入参: index 零起始字体索引, text 待检查文字
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// 返回: string 按首次出现顺序去重的缺失字符, error 字体或文字格式错误
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func (f FontFile) MissingGlyphs(index int, text string) (string, error) {
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if !utf8.ValidString(text) {
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return "", fmt.Errorf("text must be UTF-8")
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}
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data, err := f.Face(index)
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if err != nil {
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return "", err
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}
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return basefont.MissingGlyphs(data, text)
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}
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