[cairo-commit] cairo-java/src/jni org_freedesktop_cairo_Cairo.c, 1.3, 1.4

[Jeffrey Morgan]

Committed by: kuzman

Update of /cvs/cairo/cairo-java/src/jni
In directory gabe:/tmp/cvs-serv2234/src/jni

Modified Files:
	org_freedesktop_cairo_Cairo.c 
Log Message:
Completed implementation of current_path and current_path_flat

Index: org_freedesktop_cairo_Cairo.c
===================================================================
RCS file: /cvs/cairo/cairo-java/src/jni/org_freedesktop_cairo_Cairo.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -d -r1.3 -r1.4
--- org_freedesktop_cairo_Cairo.c	5 Mar 2005 01:59:41 -0000	1.3
+++ org_freedesktop_cairo_Cairo.c	8 Mar 2005 21:31:59 -0000	1.4
@@ -1151,6 +1151,199 @@
     cairo_rel_line_to(cr, 0.0, y);
 }
 
+
+typedef struct {
+  JNIEnv *env;
+  jobject obj;
+  jmethodID move_to;
+  jmethodID line_to;
+  jmethodID curve_to;
+  jmethodID close_path;
+} CairoCallback;
+
+CairoCallback* callback_data(JNIEnv *env, jobject cb)
+{
+  	jthrowable exc;
+  	jclass Exception;
+  	CairoCallback *cbdata;
+
+	cbdata = g_new(CairoCallback, 1);
+	/* add the target object to the struct */
+	cbdata->obj = (*env)->NewGlobalRef(env, cb);
+
+	cbdata->move_to = 
+		(*env)->GetMethodID(env, (*env)->GetObjectClass(env, cb), 
+				"moveTo", "(DD)V");
+	exc = (*env)->ExceptionOccurred(env);
+	if (exc) {
+		g_warning("cairo-java - cannot find callback method moveTo\n");
+		(*env)->ExceptionClear(env);
+		Exception = (* env)->FindClass(env, "java/lang/RuntimeException");
+		(* env)->ThrowNew(env, Exception, "" );
+		return NULL;
+	}
+
+	cbdata->line_to = 
+		(*env)->GetMethodID(env, (*env)->GetObjectClass(env, cb), 
+				"lineTo", "(DD)V");
+	exc = (*env)->ExceptionOccurred(env);
+	if (exc) {
+		g_warning("cairo-java - cannot find callback method lineTo\n");
+		(*env)->ExceptionClear(env);
+		Exception = (* env)->FindClass(env, "java/lang/RuntimeException");
+		(* env)->ThrowNew(env, Exception, "" );
+		return NULL;
+	}
+
+	cbdata->curve_to = 
+		(*env)->GetMethodID(env, (*env)->GetObjectClass(env, cb), 
+				"curveTo", "(DDDDDD)V");
+	exc = (*env)->ExceptionOccurred(env);
+	if (exc) {
+		g_warning("cairo-java - cannot find callback method curveTo\n");
+		(*env)->ExceptionClear(env);
+		Exception = (* env)->FindClass(env, "java/lang/RuntimeException");
+		(* env)->ThrowNew(env, Exception, "" );
+		return NULL;
+	}
+
+	cbdata->close_path = 
+		(*env)->GetMethodID(env, (*env)->GetObjectClass(env, cb), 
+				"closePath", "()V");
+	exc = (*env)->ExceptionOccurred(env);
+	if (exc) {
+		g_warning("cairo-java - cannot find callback method closePath\n");
+		(*env)->ExceptionClear(env);
+		Exception = (* env)->FindClass(env, "java/lang/RuntimeException");
+		(* env)->ThrowNew(env, Exception, "" );
+		return NULL;
+	}
+
+	/* add the env to the struct */
+	cbdata->env = env;
+}
+
+void
+move_to_callback(void *data, double x, double y)
+{
+	jvalue *jargs;
+	CairoCallback* cbdata = data;
+	jthrowable exc;
+	
+	jargs = alloca(2 * sizeof(jvalue));
+	jargs[0].d = x;
+	jargs[1].d = y;
+	
+	(*cbdata->env)->CallVoidMethodA(cbdata->env, 
+				       cbdata->obj, 
+				       cbdata->move_to, 
+				       jargs);
+	if (exc) {
+		/* Print stack trace */
+		(* cbdata->env)->ExceptionDescribe(cbdata->env);
+		/* clear the exception, so we can continue. */		
+    	(* cbdata->env)->ExceptionClear(cbdata->env);
+	}
+}
+
+void
+line_to_callback(void *data, double x, double y)
+{
+	jvalue *jargs;
+	CairoCallback* cbdata = data;
+	jthrowable exc;
+	
+	jargs = alloca(2 * sizeof(jvalue));
+	jargs[0].d = x;
+	jargs[1].d = y;
+	
+	(*cbdata->env)->CallVoidMethodA(cbdata->env, 
+				       cbdata->obj, 
+				       cbdata->line_to, 
+				       jargs);
+	if (exc) {
+		/* Print stack trace */
+		(* cbdata->env)->ExceptionDescribe(cbdata->env);
+		/* clear the exception, so we can continue. */		
+    	(* cbdata->env)->ExceptionClear(cbdata->env);
+	}
+}
+
+void
+curve_to_callback(void *data, double x1, double y1, double x2, double y2,
+		double x3, double y3)
+{
+	jvalue *jargs;
+	CairoCallback* cbdata = data;
+	jthrowable exc;
+	
+	jargs = alloca(6 * sizeof(jvalue));
+	jargs[0].d = x1;
+	jargs[1].d = y1;
+	jargs[2].d = x2;
+	jargs[3].d = y2;
+	jargs[4].d = x3;
+	jargs[5].d = y3;
+	
+	(*cbdata->env)->CallVoidMethodA(cbdata->env, 
+				       cbdata->obj, 
+				       cbdata->curve_to, 
+				       jargs);
+	if (exc) {
+		/* Print stack trace */
+		(* cbdata->env)->ExceptionDescribe(cbdata->env);
+		/* clear the exception, so we can continue. */		
+    	(* cbdata->env)->ExceptionClear(cbdata->env);
+	}
+}
+
+void
+close_path_callback(void *data)
+{
+	CairoCallback* cbdata = data;
+	jthrowable exc;
+	
+	(*cbdata->env)->CallVoidMethod(cbdata->env, 
+				       cbdata->obj, 
+				       cbdata->move_to);
+	exc = (* cbdata->env)->ExceptionOccurred(cbdata->env);
+	if (exc) {
+		/* Print stack trace */
+		(* cbdata->env)->ExceptionDescribe(cbdata->env);
+		/* clear the exception, so we can continue. */		
+    	(* cbdata->env)->ExceptionClear(cbdata->env);
+	}
+}
+
+
+/*
+ * Class:     org_freedesktop_cairo_Cairo
+ * Method:    cairo_current_path
+ * Signature: (Lorg/gnu/glib/Handle;Ljava/lang/Object;)V
+ */
+JNIEXPORT void JNICALL Java_org_freedesktop_cairo_Cairo_cairo_1current_1path
+  (JNIEnv *env, jclass cls, jobject obj, jobject cb)
+{
+	cairo_t *cr = (cairo_t*)getPointerFromHandle(env, obj);
+	CairoCallback *cbdata = callback_data(env, cb);
+	cairo_current_path(cr, move_to_callback, line_to_callback,
+			curve_to_callback, close_path_callback, cbdata);	
+}
+
+/*
+ * Class:     org_freedesktop_cairo_Cairo
+ * Method:    cairo_current_path_flat
+ * Signature: (Lorg/gnu/glib/Handle;Ljava/lang/Object;)V
+ */
+JNIEXPORT void JNICALL Java_org_freedesktop_cairo_Cairo_cairo_1current_1path_1flat
+  (JNIEnv *env, jclass cls, jobject obj, jobject cb)
+{
+	cairo_t *cr = (cairo_t*)getPointerFromHandle(env, obj);
+	CairoCallback *cbdata = callback_data(env, cb);
+	cairo_current_path_flat(cr, move_to_callback, line_to_callback,
+			close_path_callback, cbdata);	
+}
+
 #ifdef __cplusplus
 }
 #endif