mirror of
https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 14:53:44 +08:00
96 lines
3.1 KiB
Go
96 lines
3.1 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 "image/color"
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// OFDCompiler 使用库自有页面语义，字体和几何操作交给当前后端配置
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type OFDCompiler struct{}
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// Name 返回页面编译器标识
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// 返回: string 编译器标识
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func (OFDCompiler) Name() string { return "ofd" }
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// CompilePage 使用公共OFD语义和配置的字形、几何能力编译页面
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// 入参: r 渲染器, page 页面
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// 返回: *RasterPage 绘制页面, error 编译错误
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func (OFDCompiler) CompilePage(r *Renderer, page *PageContent) (*RasterPage, error) {
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box, err := r.GetPageBox(page)
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if err != nil {
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return nil, err
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}
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c, err := newSemanticCompiler(r)
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if err != nil {
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return nil, err
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}
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c.page = &RasterPage{Width: box.W, Height: box.H, DPI: r.DPI}
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if _, _, err := c.page.PixelSize(); err != nil {
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return nil, err
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}
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if !r.TransparentBackground {
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if err := c.fill(geometryRectangle(Box{W: box.W, H: box.H}), Paint{Kind: PaintSolid, Color: color.RGBA{255, 255, 255, 255}}, false, nil, IdentityMatrix, IdentityMatrix); err != nil {
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return nil, err
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}
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}
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if err := r.WalkPage(page, c); err != nil {
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return nil, err
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}
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if r.OnPageText != nil {
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r.OnPageText(page, &c.text)
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}
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return c.page, nil
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}
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// PageText 提取与页面绘制相同定位的原文，不读取图片像素
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// 入参: r 渲染器, page 页面
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// 返回: *PageText 页面文字, error 定位错误
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func (OFDCompiler) PageText(r *Renderer, page *PageContent) (*PageText, error) {
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if _, err := r.GetPageBox(page); err != nil {
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return nil, err
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}
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c, err := newSemanticCompiler(r)
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if err != nil {
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return nil, err
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}
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c.textOnly = true
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if err := r.WalkPage(page, c); err != nil {
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return nil, err
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}
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return &c.text, nil
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}
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// MeasureObject 复用文字和图形编译规则收集范围，不分配页面像素
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// 入参: r 渲染器, object 对象, options 度量上下文
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// 返回: ObjectMeasurement 对象范围与轮廓, error 度量错误
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func (OFDCompiler) MeasureObject(r *Renderer, object GraphicObject, options MeasureOptions) (ObjectMeasurement, error) {
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c, err := newSemanticCompiler(r)
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if err != nil {
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return ObjectMeasurement{}, err
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}
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boundary, ctm := editorGeometry(object)
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if _, err := creationBox(boundary); err != nil {
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return ObjectMeasurement{}, err
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}
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if ctm != "" {
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if _, err := creationNumbers(ctm, 6); err != nil {
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return ObjectMeasurement{}, err
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}
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}
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c.measure = true
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c.contours = options.Contours
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err = r.WalkObject(&object, RenderState{Defaults: options.Defaults, Parent: options.Parent, BoundaryInCTM: options.BoundaryInCTM, Clip: options.Clip}, c)
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return c.measurement, err
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}
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