forked from signintech/gopdf
/
subfont_descriptor_obj.go
74 lines (62 loc) · 2.48 KB
/
subfont_descriptor_obj.go
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package gopdf
import (
"bytes"
"fmt"
"github.com/signintech/gopdf/fontmaker/core"
)
//SubfontDescriptorObj pdf subfont descriptorObj object
type SubfontDescriptorObj struct {
buffer bytes.Buffer
PtrToSubsetFontObj *SubsetFontObj
indexObjPdfDictionary int
}
func (s *SubfontDescriptorObj) init(func() *GoPdf) {}
func (s *SubfontDescriptorObj) getType() string {
return "SubFontDescriptor"
}
func (s *SubfontDescriptorObj) getObjBuff() *bytes.Buffer {
return &s.buffer
}
func (s *SubfontDescriptorObj) build(objID int) error {
ttfp := s.PtrToSubsetFontObj.GetTTFParser()
//fmt.Printf("-->%d\n", ttfp.UnitsPerEm())
s.buffer.WriteString("<<\n")
s.buffer.WriteString("/Type /FontDescriptor\n")
s.buffer.WriteString(fmt.Sprintf("/Ascent %d\n", DesignUnitsToPdf(ttfp.Ascender(), ttfp.UnitsPerEm())))
s.buffer.WriteString(fmt.Sprintf("/CapHeight %d\n", DesignUnitsToPdf(ttfp.CapHeight(), ttfp.UnitsPerEm())))
s.buffer.WriteString(fmt.Sprintf("/Descent %d\n", DesignUnitsToPdf(ttfp.Descender(), ttfp.UnitsPerEm())))
s.buffer.WriteString(fmt.Sprintf("/Flags %d\n", ttfp.Flag()))
s.buffer.WriteString(fmt.Sprintf("/FontBBox [%d %d %d %d]\n",
DesignUnitsToPdf(ttfp.XMin(), ttfp.UnitsPerEm()),
DesignUnitsToPdf(ttfp.YMin(), ttfp.UnitsPerEm()),
DesignUnitsToPdf(ttfp.XMax(), ttfp.UnitsPerEm()),
DesignUnitsToPdf(ttfp.YMax(), ttfp.UnitsPerEm()),
))
s.buffer.WriteString(fmt.Sprintf("/FontFile2 %d 0 R\n", s.indexObjPdfDictionary+1))
s.buffer.WriteString(fmt.Sprintf("/FontName /%s\n", CreateEmbeddedFontSubsetName(s.PtrToSubsetFontObj.GetFamily())))
s.buffer.WriteString(fmt.Sprintf("/ItalicAngle %d\n", ttfp.ItalicAngle()))
s.buffer.WriteString("/StemV 0\n")
s.buffer.WriteString(fmt.Sprintf("/XHeight %d\n", DesignUnitsToPdf(ttfp.XHeight(), ttfp.UnitsPerEm())))
s.buffer.WriteString(">>\n")
return nil
}
//SetIndexObjPdfDictionary set PdfDictionary pointer
func (s *SubfontDescriptorObj) SetIndexObjPdfDictionary(index int) {
s.indexObjPdfDictionary = index
}
//SetPtrToSubsetFontObj set SubsetFont pointer
func (s *SubfontDescriptorObj) SetPtrToSubsetFontObj(ptr *SubsetFontObj) {
s.PtrToSubsetFontObj = ptr
}
//DesignUnitsToPdf convert unit
func DesignUnitsToPdf(val int, unitsPerEm uint) int {
return core.Round(float64(float64(val) * 1000.00 / float64(unitsPerEm)))
}
//GetObjBuff get buffer
func (s *SubfontDescriptorObj) GetObjBuff() *bytes.Buffer {
return s.getObjBuff()
}
//Build build buffer
func (s *SubfontDescriptorObj) Build(objID int) error {
return s.build(objID)
}