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Diffstat (limited to 'fpdf.go')
-rw-r--r--fpdf.go91
1 files changed, 91 insertions, 0 deletions
diff --git a/fpdf.go b/fpdf.go
index e2ff7d7..3e4188c 100644
--- a/fpdf.go
+++ b/fpdf.go
@@ -85,6 +85,10 @@ func fpdfNew(orientationStr, unitStr, sizeStr, fontDirStr string, size SizeType)
f.diffs = make([]string, 0, 8)
f.templates = make(map[string]Template)
f.templateObjects = make(map[string]int)
+ f.importedObjs = make(map[string][]byte, 0)
+ f.importedObjPos = make(map[string]map[int]string, 0)
+ f.importedTplObjs = make(map[string]string)
+ f.importedTplIDs = make(map[string]int, 0)
f.images = make(map[string]*ImageInfoType)
f.pageLinks = make([][]linkType, 0, 8)
f.pageLinks = append(f.pageLinks, make([]linkType, 0, 0)) // pageLinks[0] is unused (1-based)
@@ -3102,6 +3106,86 @@ func (f *Fpdf) GetImageInfo(imageStr string) (info *ImageInfoType) {
return f.images[imageStr]
}
+// ImportObjects imports objects from gofpdi into current document
+func (f *Fpdf) ImportObjects(objs map[string][]byte) {
+ for k, v := range objs {
+ f.importedObjs[k] = v
+ }
+}
+
+// ImportObjPos imports object hash positions from gofpdi
+func (f *Fpdf) ImportObjPos(objPos map[string]map[int]string) {
+ for k, v := range objPos {
+ f.importedObjPos[k] = v
+ }
+}
+
+// putImportedTemplates writes the imported template objects to the PDF
+func (f *Fpdf) putImportedTemplates() {
+ nOffset := f.n + 1
+
+ // keep track of list of sha1 hashes (to be replaced with integers)
+ objsIDHash := make([]string, len(f.importedObjs))
+
+ // actual object data with new id
+ objsIDData := make([][]byte, len(f.importedObjs))
+
+ // Populate hash slice and data slice
+ i := 0
+ for k, v := range f.importedObjs {
+ objsIDHash[i] = k
+ objsIDData[i] = v
+
+ i++
+ }
+
+ // Populate a lookup table to get an object id from a hash
+ hashToObjID := make(map[string]int, len(f.importedObjs))
+ for i = 0; i < len(objsIDHash); i++ {
+ hashToObjID[objsIDHash[i]] = i + nOffset
+ }
+
+ // Now, replace hashes inside data with %040d object id
+ for i = 0; i < len(objsIDData); i++ {
+ // get hash
+ hash := objsIDHash[i]
+
+ for pos, h := range f.importedObjPos[hash] {
+ // Convert object id into a 40 character string padded with spaces
+ objIDPadded := fmt.Sprintf("%40s", fmt.Sprintf("%d", hashToObjID[h]))
+
+ // Convert objIDPadded into []byte
+ objIDBytes := []byte(objIDPadded)
+
+ // Replace sha1 hash with object id padded
+ for j := pos; j < pos+40; j++ {
+ objsIDData[i][j] = objIDBytes[j-pos]
+ }
+ }
+
+ // Save objsIDHash so that procset dictionary has the correct object ids
+ f.importedTplIDs[hash] = i + nOffset
+ }
+
+ // Now, put objects
+ for i = 0; i < len(objsIDData); i++ {
+ f.newobj()
+ f.out(string(objsIDData[i]))
+ }
+}
+
+// UseImportedTemplate uses imported template from gofpdi - draws imported PDF page onto page
+func (f *Fpdf) UseImportedTemplate(tplName string, scaleX float64, scaleY float64, tX float64, tY float64) {
+ f.outf("q 0 J 1 w 0 j 0 G 0 g q %.4F 0 0 %.4F %.4F %.4F cm %s Do Q Q\n", scaleX*f.k, scaleY*f.k, tX*f.k, (tY+f.h)*f.k, tplName)
+}
+
+// ImportTemplates imports gofpdi template names into importedTplObjs - to be included in the procset dictionary
+func (f *Fpdf) ImportTemplates(tpls map[string]string) {
+ for tplName, tplID := range tpls {
+ f.importedTplObjs[tplName] = tplID
+ }
+}
+
// GetConversionRatio returns the conversion ratio based on the unit given when
// creating the PDF.
func (f *Fpdf) GetConversionRatio() float64 {
@@ -4174,6 +4258,12 @@ func (f *Fpdf) putxobjectdict() {
}
}
}
+ {
+ for tplName, objID := range f.importedTplObjs {
+ // here replace obj id hash with n
+ f.outf("%s %d 0 R", tplName, f.importedTplIDs[objID])
+ }
+ }
}
func (f *Fpdf) putresourcedict() {
@@ -4289,6 +4379,7 @@ func (f *Fpdf) putresources() {
}
f.putimages()
f.putTemplates()
+ f.putImportedTemplates() // gofpdi
// Resource dictionary
f.offsets[2] = f.buffer.Len()
f.out("2 0 obj")