diff options
Diffstat (limited to 'fpdf.go')
| -rw-r--r-- | fpdf.go | 91 |
1 files changed, 91 insertions, 0 deletions
@@ -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") |