1 files changed, 35 insertions, 0 deletions
diff --git a/demos/java/jni/gs_jni/instance_data.h b/demos/java/jni/gs_jni/instance_data.h
new file mode 100644
index 00000000..2b2afe2e
--- /dev/null
+++ b/demos/java/jni/gs_jni/instance_data.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <jni.h>
+
+#include "settings.h"
+
+/*
+This class stores data about a Ghostscript instance.
+*/
+class GSInstanceData
+{
+public:
+	void *instance = NULL;			// The Ghostscript instance
+	void *callerHandle = NULL;		// The caller handle passed to gsapi_new_instance
+	void *stdioHandle = NULL;		// The caller handle passed to gsapi_set_stdio_with_handle
+	void *displayHandle = NULL;		// The handle passed to display callbacks
+
+	JNIEnv *env = NULL;				// The JNIEnv which should be used for JNI API calls
+
+	jobject stdIn = NULL;			// The user IStdInFunction class for stdin input
+	jobject stdOut = NULL;			// The user IStdOutFunction class for stdout output
+	jobject stdErr = NULL;			// The user IStdErrFunction class for stderr output
+
+	jobject poll = NULL;			// The user IPollFunction class
+
+	jobject displayCallback = NULL;	// The user DisplayCallback class
+
+	jobject callout = NULL;			// The user ICalloutFunction class
+
+	bool hasinit = false;			// Whether the user has called init_with_args
+};
+
+GSInstanceData *putInstanceData(GSInstanceData *data);
+GSInstanceData *findDataFromInstance(void *instance);
+void deleteDataFromInstance(void *instance);
+\ No newline at end of file