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Get started with Go (C Interface Binding)

Welcome to PDFTron. Go (C Interface Binding) for the PDFTron SDK is supported on Windows, Linux, macOS. To get started, choose your preferred platform from the tabs below.

macOS Go (C Interface Binding) PDF library integration

C interface binding example
This guide is a demo for using our C interface binding and is not a production version of the Go wrapper. Please visit our PDFTron SDK for Go documentation for more information on using our production version of Go.

This guide will help you integrate a free trial of the PDFTron SDK with Go using PDFTron Headers on macOS. Your free trial includes unlimited trial usage and support from solution engineers.

Prerequisites

  • Go 1.6+

    Make sure Go is installed at /usr/local/go and /usr/local/go/bin.

  • PDFTron SDK for macOS

No trial license key required.
The trial of PDFTron SDK works without a license key. A commercial license key is required for use in a production environment. Please fill out our licensing form if you do not have a valid license key.
Keep your commercial license key confidential.
License keys are uniquely generated. Please make sure that it is not publicly available (e.g. in your public GitHub).

Setup

  1. Create a project directory called myApp.

  2. Extract the PDFNetCMac package as a folder into your project directory.

    ~/myApp
    ~/myApp/PDFNetCMac
    ~/myApp/PDFNetCMac/Headers
    ~/myApp/PDFNetCMac/Lib
    ...

Integrate PDFTron SDK with Go

  1. In your project directory, create a new file called myApp.go

    Add the following code inside:

//@data {"ga":1332862856}// package main // #cgo CFLAGS: -IPDFNetCMac/Headers // #cgo LDFLAGS: -LPDFNetCMac/Lib -Wl,-rpath,PDFNetCMac/Lib -lPDFNetC // #include "C/PDF/TRN_PDFNet.h" // #include "C/SDF/TRN_SDFDoc.h" // #include "C/PDF/TRN_PDFDoc.h" // #include "C/PDF/TRN_Page.h" // #include "C/Common/TRN_UString.h" // #include "C/Common/TRN_Types.h" // #include <stdlib.h> // #include <stdio.h> import "C" import ( "fmt"; "unsafe" ) func main() { // PDFNet must be initialized before calling other PDFTron API ccp := C.CString("YOUR_DEMO_KEY") C.TRN_PDFNetInitialize(ccp)

// Create a new PDFDoc
    var doc *C.TRN_PDFDoc
    doc = (*C.TRN_PDFDoc)(C.malloc(C.size_t(unsafe.Sizeof(*doc))))
    C.TRN_PDFDocCreate(doc)

    // Allocate memory for a blank page
    var page *C.TRN_Page
    page = (*C.TRN_Page)(C.malloc(C.size_t(unsafe.Sizeof(*page))))

    // Allocate memory for a default rectangle
    var box *C.TRN_Rect
    box = (*C.TRN_Rect)(C.malloc(C.size_t(unsafe.Sizeof(*box))))

    // Create the page and add it to the document
    C.TRN_PDFDocPageCreate(*doc, box, page)
    C.TRN_PDFDocPagePushBack(*doc, *page)

    // Save the document as a linearized PDF
    var filepath C.TRN_UString
    C.TRN_UStringCreateFromCharString(C.CString("output.pdf"), C.int(10),
    C.e_UString_utf8, &filepath)
    C.TRN_PDFDocSave(*doc, filepath, 0);
    fmt.Println("Hello World!");
}
```

Save and close the file.

Your folder should look similar to:

```

~/myApp
~/myApp/PDFNetCMac
~/myApp/PDFNetCMac/Headers
~/myApp/PDFNetCMac/Lib
...
~/myApp/myApp.go
```
  1. In the project folder, run:

    go build

    This will produce a myApp executable file.

  2. Run the executable file. The executable will produce a pdf with a blank page in a linearized format.

Want to generate your own bindings?

You can generate bindings for PDFTron SDK APIs using various methods. It is recommended to use SWIG to generate these bindings. The header files to include can be found in PDFNET_BASE\Headers\ and the library can be found in PDFNET_BASE\Lib\.

Next step

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