DLL in processing

Lubos · December 9, 2019, 12:33pm

How to use (non Windows) DLL within Processing?

Lexyth · December 9, 2019, 5:15pm

You‘ll have to stick to plain Java for this, since Processing itself doesn‘t have a library for this.

java-native-access/jna/blob/master/www/GettingStarted.md

Getting Started with JNA
========================

Java Native Access (JNA) has a single component, `jna.jar`; the supporting native library (jnidispatch) is included in the jar file. JNA is capable of extracting and loading the native library on its own, so you don't need additional configuration. JNA falls back to extraction if the native library is not already installed on the local system somewhere accessible to `System.loadLibrary`. The native library is also available in platform-specific jar files for use with Java Web Start.

Begin by downloading the latest release of JNA and referencing `jna.jar` in your project's `CLASSPATH`.

The following example maps the printf function from the standard C library and calls it. 
``` java
package com.sun.jna.examples;

import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Platform;

/** Simple example of JNA interface mapping and usage. */
public class HelloWorld {

    // This is the standard, stable way of mapping, which supports extensive
    // customization and mapping of Java to native types.

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JNA Tutorial :

github.com

java-native-access/jna/blob/master/www/PlatformLibrary.md

Platform Library
================

JNA includes `platform.jar` that has cross-platform mappings and mappings for a number of commonly used platform functions, including a large number of Win32 mappings as well as a set of utility classes that simplify native access. The code is tested and the utility interfaces ensure that native memory management is taken care of correctly.

Before you map your own functions, check the platform package documentation for an already mapped one.

Platform-specific structures are mapped by header. For example, `ShlObj.h` structures can be found in `com.sun.jna.platform.win32.ShlObj`. Platform functions are mapped by library. For example, `Advapi32.dll` functions can be found in `com.sun.jna.platform.win32.Advapi32`. Simplified interfaces (wrappers) for `Advapi32.dll` functions can be found in `com.sun.jna.platform.win32.Advapi32Util`.

Cross-platform functions and structures are implemented in `com.sun.jna.platform`. These currently include the following.

* `FileMonitor`: a cross-platform file system watcher
* `FileUtils`: a cross-platform set of file-related functions, such as move to the recycle bin
* `KeyboardUtils`: a cross-platform set of keyboard functions, such as finding out whether a key is pressed
* `WindowUtils`: a cross-platform set of window functions, providing non-rectangular shaped and transparent windows.


COM support
===========

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DLL in processing

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