package gofpdi import ( realgofpdi "github.com/phpdave11/gofpdi" ) // Create new gofpdi instance var fpdi = realgofpdi.NewImporter() // gofpdiPdf is a partial interface that only implements the functions we need // from the PDF generator to put the imported PDF templates on the PDF. type gofpdiPdf interface { ImportObjects(objs map[string][]byte) ImportObjPos(objs map[string]map[int]string) ImportTemplates(tpls map[string]string) UseImportedTemplate(tplName string, x float64, y float64, w float64, h float64) SetError(err error) } // Imports a page of a PDF file with the specified box (/MediaBox, /TrimBox, /ArtBox, /CropBox, or /BleedBox). // Returns a template id that can be used with UseImportedTemplate to draw the template onto the page. func ImportPage(f gofpdiPdf, sourceFile string, pageno int, box string) int { // Set source file for fpdi fpdi.SetSourceFile(sourceFile) // Import page tpl := fpdi.ImportPage(pageno, box) // Import objects into current pdf document // Unordered means that the objects will be returned with a sha1 hash instead of an integer // The objects themselves may have references to other hashes which will be replaced in ImportObjects() tplObjIDs := fpdi.PutFormXobjectsUnordered() // Set template names and ids (hashes) in gofpdf f.ImportTemplates(tplObjIDs) // Get a map[string]string of the imported objects. // The map keys will be the ID of each object. imported := fpdi.GetImportedObjectsUnordered() // Import gofpdi objects into gofpdf f.ImportObjects(imported) // Get a map[string]map[int]string of the object hashes and their positions within each object, // to be replaced with object ids (integers). importedObjPos := fpdi.GetImportedObjHashPos() // Import gofpdi object hashes and their positions into gopdf f.ImportObjPos(importedObjPos) return tpl } // Draw the template onto the page at x,y // If w is 0, the template will be scaled to fit based on h // If h is 0, the template will be scaled to fit based on w func UseImportedTemplate(f gofpdiPdf, tplid int, x float64, y float64, w float64, h float64) { // Get values from fpdi tplName, scaleX, scaleY, tX, tY := fpdi.UseTemplate(tplid, x, y, w, h) f.UseImportedTemplate(tplName, scaleX, scaleY, tX, tY) }