mirror of
https://github.com/xiaoqidun/ofdgo.git
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74 lines
2.7 KiB
Go
74 lines
2.7 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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"io"
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)
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// SVGFont SVG引用的字体资源，Name为CSS字体族标识，Data为只读字体数据
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type SVGFont struct {
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Name string
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Weight int
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Style string
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Data []byte
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}
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// SVGImage SVG引用的图片资源，Name为图片地址，Data为只读图片数据
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type SVGImage struct {
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Name string
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MIME string
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Data []byte
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}
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// SVGResources SVG引用的字体和图片资源
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type SVGResources struct {
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Fonts []SVGFont
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Images []SVGImage
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}
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// RenderToSVGWithFonts 渲染为SVG并返回页面引用的字体资源，不在SVG中嵌入字体
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// 入参: page 页面内容, writer 输出流
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// 返回: []SVGFont 字体资源，可按Name复用并按Weight、Style注册，error 错误信息
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func (r *Renderer) RenderToSVGWithFonts(page *PageContent, writer io.Writer) ([]SVGFont, error) {
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resources, err := r.renderSVG(page, writer, SVGExternalFonts)
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return resources.Fonts, err
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}
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// RenderToSVGWithResources 渲染为SVG并分离字体和图片，调用方需注册字体并将图片Name映射为可访问地址
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// 入参: page 页面内容, writer 输出流
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// 返回: SVGResources 可跨页面复用的资源, error 错误信息
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func (r *Renderer) RenderToSVGWithResources(page *PageContent, writer io.Writer) (SVGResources, error) {
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return r.renderSVG(page, writer, SVGExternalResources)
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}
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// RenderToSVGWithObjects 渲染SVG并为页面对象和注解添加data-ofd-object分组，注解标识使用annotation:前缀
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// 入参: page 页面内容, writer 输出流
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// 返回: SVGResources 字体和图片资源, error 错误信息
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func (r *Renderer) RenderToSVGWithObjects(page *PageContent, writer io.Writer) (SVGResources, error) {
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return r.renderSVG(page, writer, SVGObjects)
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}
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// renderSVG 将SVG输出及对象分组交给指定后端
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// 入参: page 页面内容, writer 输出流, mode 资源封装方式
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// 返回: SVGResources 字体和图片资源, error 输出错误
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func (r *Renderer) renderSVG(page *PageContent, writer io.Writer, mode SVGMode) (SVGResources, error) {
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if r.backends.SVG == nil {
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return SVGResources{}, fmt.Errorf("svg: %w", ErrBackendUnavailable)
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}
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return r.backends.SVG.RenderSVG(r, page, writer, mode)
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}
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