feat(转换能力): 接入设备网屏与配置继承

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/tdewolff/canvas v0.0.0-20260923214215-09804640d00c
 	github.com/tdewolff/font v0.0.0-20260913163313-54f98bb59ee6
 	github.com/xiaoqidun/jbig2 v1.1.1
-	github.com/xiaoqidun/pdfgo v0.0.0-20261003152411-fd6d20ac0470
+	github.com/xiaoqidun/pdfgo v0.0.0-20261003171053-bd8834324b6d
 	golang.org/x/crypto v0.57.0
 	golang.org/x/image v0.46.0
 	golang.org/x/text v0.42.0

go.sum

@@ -62,8 +62,8 @@ github.com/tdewolff/test v1.0.12 h1:7F21DqIajswxuche0geHdrUZRCWE4oko4b7bcmkkrxk=
 github.com/tdewolff/test v1.0.12/go.mod h1:XPuWBzvdUzhCuxWO1ojpXsyzsA5bFoS3tO/Q3kFuTG8=
 github.com/xiaoqidun/jbig2 v1.1.1 h1:SjliS9ZO0e9HX5oYUfBuXrfFsXhWricrSz+XY4zORDI=
 github.com/xiaoqidun/jbig2 v1.1.1/go.mod h1:8QonVWtENmh2kc6l+leqeGl7psb79DWlHDkCpdChjfQ=
-github.com/xiaoqidun/pdfgo v0.0.0-20261003152411-fd6d20ac0470 h1:jH4WLMpcFUYwpu9TzYYgqYiv1NTEMBsEzaO2qpiEc6w=
+github.com/xiaoqidun/pdfgo v0.0.0-20261003171053-bd8834324b6d h1:8JS9LgB+i9n9/g997JaWObw4aVDPGLrRQASHdWSusGE=
-github.com/xiaoqidun/pdfgo v0.0.0-20261003152411-fd6d20ac0470/go.mod h1:4Pf0JO0BEf1uzRY+uZjlMjN/OPn3PYa0YMi6cqPPTLQ=
+github.com/xiaoqidun/pdfgo v0.0.0-20261003171053-bd8834324b6d/go.mod h1:4Pf0JO0BEf1uzRY+uZjlMjN/OPn3PYa0YMi6cqPPTLQ=
 github.com/xyproto/randomstring v1.0.5 h1:YtlWPoRdgMu3NZtP45drfy1GKoojuR7hmRcnhZqKjWU=
 github.com/xyproto/randomstring v1.0.5/go.mod h1:rgmS5DeNXLivK7YprL0pY+lTuhNQW3iGxZ18UQApw/E=
 github.com/yuin/goldmark v1.8.5 h1:r6N5afV5qj/5S4UTch8agZHJ8UxNCMwX7WjkkJam2NA=

ofdgo_pdf.go

@@ -37,6 +37,7 @@ var ErrPDFPassword = pdfgo.ErrPassword
 // OnProgress按open、pages、convert及write.*阶段报告进度，total为0表示总量未知
 // ResolveFile读取PDF引用的外部媒体、附件和页面，默认不访问网络或本地路径
 // ResolveReference可提供已解密的引用页面，目标阅读器由调用方维护
+// Halftones提供只读设备命名网屏，所属阅读器由调用方维护，连续色调输出不网屏化
 type PDFImportOptions struct {
 	Password         []byte
 	PasswordUTF8     bool
@@ -48,6 +49,7 @@ type PDFImportOptions struct {
 	RasterDPI        float64
 	ResolveFile      pdfgo.FileResolver
 	ResolveReference pdfgo.ReferenceResolver
+	Halftones        map[string]*pdfgo.Halftone
 }
 
 // PDFImportReport 汇总转换页数、对象数、链接数和转换警告
@@ -98,6 +100,7 @@ type pdfImporter struct {
 	referenceStreams map[*pdfgo.Stream]*pdfgo.Reader
 	referencePages   map[pdfReferencePageKey]*pdfgo.Page
 	halftoneWarnings map[*pdfgo.Halftone]bool
+	halftones        map[string]*pdfgo.Halftone
 	transferBackdrop bool
 }
 
@@ -144,6 +147,7 @@ func ImportPDF(ctx context.Context, source io.ReaderAt, size int64, options PDFI
 	importer.pageIndexes = make(map[pdfgo.Reference]int)
 	importer.resolveFile = options.ResolveFile
 	importer.resolveReference = options.ResolveReference
+	importer.halftones = options.Halftones
 	importer.referenceReaders = make(map[[32]byte]*pdfgo.Reader)
 	importer.referenceStreams = make(map[*pdfgo.Stream]*pdfgo.Reader)
 	importer.referencePages = make(map[pdfReferencePageKey]*pdfgo.Page)

ofdgo_pdf_composite.go

@@ -245,7 +245,7 @@ func (p *pdfImporter) collectCompositeNodes(walk func(pdfgo.Visitor) error) ([]p
 	var collect func(func(pdfgo.Visitor) error) ([]pdfCompositeNode, error)
 	collect = func(walk func(pdfgo.Visitor) error) ([]pdfCompositeNode, error) {
 		var nodes []pdfCompositeNode
-		v := pdfgo.Visitor{Warning: p.warning, Reference: p.referencePage}
+		v := pdfgo.Visitor{Warning: p.warning, Reference: p.referencePage, Halftones: p.halftones}
 		v.Path = func(mark pdfgo.PathMark) error {
 			if err := p.halftone(mark.Style); err != nil {
 				return err

ofdgo_pdf_group.go

@@ -95,6 +95,7 @@ func pdfOpaqueVisitor(visitor pdfgo.Visitor) pdfgo.Visitor {
 	v := pdfgo.Visitor{
 		Reference:       visitor.Reference,
 		OptionalContent: visitor.OptionalContent,
+		Halftones:       visitor.Halftones,
 		Path:            func(m pdfgo.PathMark) error { return check(m.Style, m.Fill, m.Stroke) },
 		Text: func(m pdfgo.TextMark) error {
 			return check(m.Style, m.Mode%4 == 0 || m.Mode%4 == 2, m.Mode%4 == 1 || m.Mode%4 == 2)
@@ -138,6 +139,7 @@ func (p *pdfImporter) groupPaths(mark pdfgo.GroupMark, walk func(pdfgo.Visitor)
 	collect := pdfgo.Visitor{
 		Reference:       visitor.Reference,
 		OptionalContent: visitor.OptionalContent,
+		Halftones:       visitor.Halftones,
 		Warning:         visitor.Warning,
 		Text:            func(pdfgo.TextMark) error { return errPDFGroupRaster },
 		Image:           func(pdfgo.ImageMark) error { return errPDFGroupRaster },
@@ -301,7 +303,7 @@ func (p *pdfImporter) rasterGroup(mark pdfgo.GroupMark, walk func(pdfgo.Visitor)
 // visitor 绑定当前导入器的图元与透明组访问函数
 // 返回: pdfgo.Visitor 页面访问器
 func (p *pdfImporter) visitor() pdfgo.Visitor {
-	v := pdfgo.Visitor{Path: p.path, Text: p.text, Image: p.image, Warning: p.warning, Reference: p.referencePage}
+	v := pdfgo.Visitor{Path: p.path, Text: p.text, Image: p.image, Warning: p.warning, Reference: p.referencePage, Halftones: p.halftones}
 	v.Group = func(mark pdfgo.GroupMark, walk func(pdfgo.Visitor) error) error { return p.group(mark, walk, v) }
 	return v
 }