xiaoqidun/ofdgo
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feat(转换能力): 补全PDF字体、渐变与链接
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xiaoqidun committed 2026-09-25 16:10:27 +08:00
1 parent b85b3bc27d
commit bbc8d59bdb
11 files changed
+165 -39
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ofdgo_pdf_object.go
+12 -11
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@@ -39,7 +39,7 @@ func (p *pdfImporter) image(mark pdfgo.ImageMark) error {
if err := p.flushPath(); err != nil {
return err
}
if mark.Image.ImageMask && mark.Style.Fill.Axial != nil {
if mark.Image.ImageMask && (mark.Style.Fill.Axial != nil || mark.Style.Fill.Radial != nil) {
return &pdfgo.UnsupportedError{Feature: "gradient stencil image"}
}
var err error
@@ -147,9 +147,6 @@ func (p *pdfImporter) text(mark pdfgo.TextMark) error {
if err := p.flushPath(); err != nil {
return err
}
if mark.Style.Fill.Axial != nil || mark.Style.Stroke.Axial != nil {
return &pdfgo.UnsupportedError{Feature: "gradient text paint"}
}
var err error
mark.Style, err = p.maskStyle(mark.Style)
if err != nil {
@@ -167,7 +164,8 @@ func (p *pdfImporter) text(mark pdfgo.TextMark) error {
if id == "" {
var err error
if embedded {
program, err := pdfFontProgram(font)
var program []byte
program, err = pdfFontProgram(font)
if err != nil {
return err
}
@@ -225,7 +223,7 @@ func (p *pdfImporter) text(mark pdfgo.TextMark) error {
}
}
if embedded && gid >= metrics.NumGlyphs() {
return fmt.Errorf("PDF glyph index outside embedded font")
return fmt.Errorf("PDF glyph index %d outside embedded font %s (%d glyphs)", gid, font.Name, metrics.NumGlyphs())
}
if !embedded && glyph.Text == "" {
return &pdfgo.UnsupportedError{Feature: "unmapped external font character"}
@@ -263,8 +261,6 @@ func (p *pdfImporter) text(mark pdfgo.TextMark) error {
}
margin := mark.Style.LineWidth * unit / 2 * math.Max(1, mark.Style.MiterLimit)
box = Box{box.X - margin, box.Y - margin, box.W + 2*margin, box.H + 2*margin}
color := StrokeColor(*p.color(mark.Style.Stroke))
object.StrokeColor = &color
object.LineWidth = mark.Style.LineWidth * unit / scale
object.LineWidthSet = object.LineWidth == 0
object.Join = []string{"Miter", "Round", "Bevel"}[mark.Style.Join]
@@ -274,6 +270,10 @@ func (p *pdfImporter) text(mark pdfgo.TextMark) error {
}
}
object.Boundary = pdfBoundary(box)
if stroke {
color := StrokeColor(*p.paintColor(mark.Style.Stroke, box))
object.StrokeColor = &color
}
if box.X >= p.pageWidth || box.Y >= p.pageHeight || box.X+box.W <= 0 || box.Y+box.H <= 0 {
visible = false
}
@@ -281,7 +281,7 @@ func (p *pdfImporter) text(mark pdfgo.TextMark) error {
object.Fill = &fill
object.Stroke = &stroke
object.Visible = &visible
object.FillColor = p.color(mark.Style.Fill)
object.FillColor = p.paintColor(mark.Style.Fill, box)
object.Clips = p.clips(mark.Style.Clips, box)
p.objects = append(p.objects, GraphicObject{Type: "TextObject", TextObject: object})
p.report.TextObjects++
@@ -293,7 +293,8 @@ func (p *pdfImporter) text(mark pdfgo.TextMark) error {
// 返回: []byte 封装后的字体数据, error 错误信息
func pdfFontProgram(source *pdfgo.Font) ([]byte, error) {
program := source.Program
if source.ProgramType == "Type1C" || source.ProgramType == "CIDFontType0C" {
bareCFF := len(program) >= 4 && program[0] == 1 && program[1] == 0 && program[2] >= 4 && program[3] >= 1 && program[3] <= 4
if source.ProgramType == "Type1C" || source.ProgramType == "CIDFontType0C" || bareCFF {
var err error
program, _, err = wrapCFFToOTF(source.Program)
if err != nil {
@@ -377,7 +378,7 @@ func pdfFontProgram(source *pdfgo.Font) ([]byte, error) {
tables["OS/2"] = buildOS2TableWithMetrics(int16(binary.BigEndian.Uint16(hhea[4:6])), int16(binary.BigEndian.Uint16(hhea[6:8])))
changed = true
}
if !changed {
if !changed && len(program)%4 == 0 {
return program, nil
}
return serializeOTF(tables)