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jeremybenn |
/* gtkpeer.c -- Some GTK peer specific helper functions
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Copyright (C) 2007 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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#include "gtkpeer.h"
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#include "jni.h"
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/**
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* The Pointer class.
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*/
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static jclass pointerClass;
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/**
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* The Pointer constructor.
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*/
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static jmethodID pointerConstructorMID;
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/**
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* The field ID of the data field in the Pointer class.
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*/
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static jfieldID pointerDataFID;
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/**
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* The field ID of the widget field in the GtkGenericPeer class.
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*/
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static jfieldID widgetFID;
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/**
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* The field ID of the globalRef field in the GtkGenericPeer class.
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*/
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static jfieldID globalRefFID;
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/**
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* The field ID of the display field in the GdkGraphicsEnvironment class.
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*/
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static jfieldID displayFID;
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/**
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* The field ID of the screen field in the GdkScreenGraphicsDevice class.
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*/
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static jfieldID screenFID;
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/**
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* The field ID of the nativeFont field in GdkFontPeer.
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*/
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static jfieldID fontFID;
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/**
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* The field ID of the nativeDecoder field in GdkPixbufDecoder.
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*/
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static jfieldID pixbufLoaderFID;
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/**
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* Initializes the IDs of the Pointer* classes.
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*
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* @param env the JNI environment
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*/
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void gtkpeer_init_pointer_IDs(JNIEnv* env)
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{
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#if SIZEOF_VOID_P == 8
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pointerClass = (*env)->FindClass (env, "gnu/classpath/Pointer64");
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if (pointerClass != NULL)
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{
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pointerClass = (*env)->NewGlobalRef (env, pointerClass);
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pointerDataFID = (*env)->GetFieldID (env, pointerClass, "data", "J");
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pointerConstructorMID = (*env)->GetMethodID (env, pointerClass, "<init>",
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"(J)V");
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}
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#else
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#if SIZEOF_VOID_P == 4
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pointerClass = (*env)->FindClass(env, "gnu/classpath/Pointer32");
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if (pointerClass != NULL)
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{
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pointerClass = (*env)->NewGlobalRef (env, pointerClass);
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pointerDataFID = (*env)->GetFieldID (env, pointerClass, "data", "I");
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pointerConstructorMID = (*env)->GetMethodID (env, pointerClass, "<init>",
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"(I)V");
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}
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#else
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#error "Pointer size is not supported."
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#endif /* SIZEOF_VOID_P == 4 */
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#endif /* SIZEOF_VOID_P == 8 */
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}
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/**
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* Initializes the field IDs for the widget reference.
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*
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* @param env the JNI environment
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*/
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void gtkpeer_init_widget_IDs(JNIEnv *env)
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{
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jclass cls;
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/* Find the widget field ID in GtkGenericPeer. */
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cls = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GtkGenericPeer");
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widgetFID = (*env)->GetFieldID(env, cls, "widget",
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"Lgnu/classpath/Pointer;");
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/* Find the globalRef field in GtkGenericPeer. */
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globalRefFID = (*env)->GetFieldID(env, cls, "globalRef",
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"Lgnu/classpath/Pointer;");
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}
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/**
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* Stores the GTK widget reference in the GtkGenericPeer object.
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*
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* @param env the JNI environment
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* @param peer the actual peer object
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* @param widget the widget reference to store
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*/
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void gtkpeer_set_widget(JNIEnv *env, jobject peer, void *widget)
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{
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jobject obj;
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/* Fetch the widget field object. */
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obj = (*env)->GetObjectField(env, peer, widgetFID);
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if (obj == NULL)
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{
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/* Create if necessary. */
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#if SIZEOF_VOID_P == 8
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obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
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(jlong) widget);
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#else
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obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
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(jint) widget);
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#endif
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(*env)->SetObjectField(env, peer, widgetFID, obj);
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}
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else
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{
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#if SIZEOF_VOID_P == 8
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(*env)->SetLongField(env, obj, pointerDataFID, (jlong) widget);
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#else
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(*env)->SetIntField(env, obj, pointerDataFID, (jint) widget);
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#endif
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}
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}
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/**
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* Retrieves the GTK widget reference from a GtkGenericPeer object.
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*
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* @param env the JNI environment
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* @param peer the actual peer object
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*
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* @return the widget reference
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*/
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void* gtkpeer_get_widget(JNIEnv *env, jobject peer)
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{
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jobject obj;
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void *widget;
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/* Fetch the widget field from the peer object. */
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obj = (*env)->GetObjectField(env, peer, widgetFID);
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/* Fetch actual widget pointer. */
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#if SIZEOF_VOID_P == 8
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widget = (void*) (*env)->GetLongField(env, obj, pointerDataFID);
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#else
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widget = (void*) (*env)->GetIntField(env, obj, pointerDataFID);
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#endif
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return widget;
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}
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/**
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* Stores the global JNI reference of a peer inside the peer.
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*
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* @param env the JNI environment
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* @param peer the peer object
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*/
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void gtkpeer_set_global_ref(JNIEnv *env, jobject peer)
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{
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jobject obj;
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void* globalRef;
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/* Create global reference. */
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globalRef = (*env)->NewGlobalRef(env, peer);
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/* Fetch the globalRef field object. */
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obj = (*env)->GetObjectField(env, peer, globalRefFID);
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if (obj == NULL)
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{
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/* Create if necessary. */
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#if SIZEOF_VOID_P == 8
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obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
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(jlong) globalRef);
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#else
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obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
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(jint) globalRef);
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#endif
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(*env)->SetObjectField(env, peer, globalRefFID, obj);
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}
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else
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{
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#if SIZEOF_VOID_P == 8
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(*env)->SetLongField(env, obj, pointerDataFID, (jlong) globalRef);
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#else
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(*env)->SetIntField(env, obj, pointerDataFID, (jint) globalRef);
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#endif
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}
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}
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/**
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* Retrieves the global reference from a peer.
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*
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* @param env the JNI environment
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* @param peer the peer object
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*
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* @return the global reference
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*/
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void* gtkpeer_get_global_ref(JNIEnv *env, jobject peer)
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{
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jobject obj;
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void *globalRef;
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/* Fetch the globalRef field from the peer object. */
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obj = (*env)->GetObjectField(env, peer, globalRefFID);
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/* Fetch actual globalRef pointer. */
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#if SIZEOF_VOID_P == 8
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globalRef = (void*) (*env)->GetLongField(env, obj, pointerDataFID);
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#else
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globalRef = (void*) (*env)->GetIntField(env, obj, pointerDataFID);
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#endif
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return globalRef;
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}
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/**
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* Deletes the global reference of a peer. This is necessary in order to
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* allow the peer to be garbage collected.
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*
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* @param env the JNI environment
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* @param peer the peer object.
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*/
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void gtkpeer_del_global_ref(JNIEnv* env, jobject peer)
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{
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jobject obj;
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void *globalRef;
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/* Fetch the globalRef field from the peer object. */
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obj = (*env)->GetObjectField(env, peer, globalRefFID);
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/* Fetch actual globalRef pointer. */
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#if SIZEOF_VOID_P == 8
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globalRef = (void*) (*env)->GetLongField(env, obj, pointerDataFID);
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#else
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globalRef = (void*) (*env)->GetIntField(env, obj, pointerDataFID);
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#endif
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(*env)->DeleteGlobalRef(env, globalRef);
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}
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/**
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* Initializes the fieldIDs for the display and screen fields.
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*
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* @param env the JNI environment
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*/
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void gtkpeer_init_display_IDs(JNIEnv* env)
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{
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jclass cls;
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/* Find the display field ID in GdkGraphicsEnvironment. */
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cls = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GdkGraphicsEnvironment");
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displayFID = (*env)->GetFieldID(env, cls, "display",
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"Lgnu/classpath/Pointer;");
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}
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/**
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* Sets the native display pointer in the GdkGraphicsEnvironment object.
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*
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* @param env the JNI environment
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* @param graphicsenv the GdkGraphicsEnvironment object
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* @param display the native display pointer
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*/
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void gtkpeer_set_display(JNIEnv* env, jobject graphicsenv, void* display)
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{
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jobject obj;
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/* Fetch the display field object. */
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obj = (*env)->GetObjectField(env, graphicsenv, displayFID);
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if (obj == NULL)
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{
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/* Create if necessary. */
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#if SIZEOF_VOID_P == 8
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obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
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(jlong) display);
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#else
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obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
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(jint) display);
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#endif
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(*env)->SetObjectField(env, graphicsenv, displayFID, obj);
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}
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else
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{
|
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#if SIZEOF_VOID_P == 8
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(*env)->SetLongField(env, obj, pointerDataFID, (jlong) display);
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#else
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(*env)->SetIntField(env, obj, pointerDataFID, (jint) display);
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#endif
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332 |
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}
|
333 |
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}
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334 |
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335 |
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/**
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336 |
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* Fetches the native display pointer from the GdkGraphicsEnvironment object.
|
337 |
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*
|
338 |
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* @param env the JNI environment
|
339 |
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* @param graphicsenv the GdkGraphicsEnvironment object
|
340 |
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*
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* @return the native display pointer
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342 |
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*/
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void* gtkpeer_get_display(JNIEnv* env, jobject graphicsenv)
|
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{
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jobject obj;
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void *display;
|
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/* Fetch the display field from the peer object. */
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obj = (*env)->GetObjectField(env, graphicsenv, displayFID);
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/* Fetch actual display pointer. */
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#if SIZEOF_VOID_P == 8
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display = (void*) (*env)->GetLongField(env, obj, pointerDataFID);
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#else
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display = (void*) (*env)->GetIntField(env, obj, pointerDataFID);
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#endif
|
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return display;
|
358 |
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}
|
359 |
|
|
|
360 |
|
|
/**
|
361 |
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* Initializes the fieldIDs for the screen field.
|
362 |
|
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*
|
363 |
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* @param env the JNI environment
|
364 |
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*/
|
365 |
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|
void gtkpeer_init_screen_IDs(JNIEnv* env)
|
366 |
|
|
{
|
367 |
|
|
jclass cls;
|
368 |
|
|
|
369 |
|
|
/* Find the display field ID in GdkScreenGraphicsDevice. */
|
370 |
|
|
cls = (*env)->FindClass(env,
|
371 |
|
|
"gnu/java/awt/peer/gtk/GdkScreenGraphicsDevice");
|
372 |
|
|
screenFID = (*env)->GetFieldID(env, cls, "screen",
|
373 |
|
|
"Lgnu/classpath/Pointer;");
|
374 |
|
|
}
|
375 |
|
|
|
376 |
|
|
/**
|
377 |
|
|
* Sets the native screen in the GdkScreenGraphicsDevice object.
|
378 |
|
|
*
|
379 |
|
|
* @param env the JNI environment
|
380 |
|
|
* @param screen_graphics_device the GdkScreenGraphicsDevice object
|
381 |
|
|
* @param ptr the native screen pointer
|
382 |
|
|
*/
|
383 |
|
|
void gtkpeer_set_screen(JNIEnv* env, jobject screen_graphics_device,
|
384 |
|
|
void* ptr)
|
385 |
|
|
{
|
386 |
|
|
jobject obj;
|
387 |
|
|
|
388 |
|
|
/* Fetch the screen field object. */
|
389 |
|
|
obj = (*env)->GetObjectField(env, screen_graphics_device, screenFID);
|
390 |
|
|
if (obj == NULL)
|
391 |
|
|
{
|
392 |
|
|
/* Create if necessary. */
|
393 |
|
|
#if SIZEOF_VOID_P == 8
|
394 |
|
|
obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
|
395 |
|
|
(jlong) ptr);
|
396 |
|
|
#else
|
397 |
|
|
obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
|
398 |
|
|
(jint) ptr);
|
399 |
|
|
#endif
|
400 |
|
|
(*env)->SetObjectField(env, screen_graphics_device, screenFID, obj);
|
401 |
|
|
}
|
402 |
|
|
else
|
403 |
|
|
{
|
404 |
|
|
#if SIZEOF_VOID_P == 8
|
405 |
|
|
(*env)->SetLongField(env, obj, pointerDataFID, (jlong) ptr);
|
406 |
|
|
#else
|
407 |
|
|
(*env)->SetIntField(env, obj, pointerDataFID, (jint) ptr);
|
408 |
|
|
#endif
|
409 |
|
|
}
|
410 |
|
|
}
|
411 |
|
|
|
412 |
|
|
/**
|
413 |
|
|
* Fetches the native screen pointer from the GdkScreenGraphicsDevice object.
|
414 |
|
|
*
|
415 |
|
|
* @param env the JNI environment
|
416 |
|
|
* @param screen_graphics_device the GdkScreenGraphicsDevice object
|
417 |
|
|
*
|
418 |
|
|
* @return the native screen pointer
|
419 |
|
|
*/
|
420 |
|
|
void* gtkpeer_get_screen(JNIEnv* env, jobject screen_graphics_device)
|
421 |
|
|
{
|
422 |
|
|
jobject obj;
|
423 |
|
|
void *screen;
|
424 |
|
|
|
425 |
|
|
/* Fetch the display field from the peer object. */
|
426 |
|
|
obj = (*env)->GetObjectField(env, screen_graphics_device, screenFID);
|
427 |
|
|
|
428 |
|
|
/* Fetch actual display pointer. */
|
429 |
|
|
#if SIZEOF_VOID_P == 8
|
430 |
|
|
screen = (void*) (*env)->GetLongField(env, obj, pointerDataFID);
|
431 |
|
|
#else
|
432 |
|
|
screen = (void*) (*env)->GetIntField(env, obj, pointerDataFID);
|
433 |
|
|
#endif
|
434 |
|
|
return screen;
|
435 |
|
|
}
|
436 |
|
|
|
437 |
|
|
/**
|
438 |
|
|
* Initializes the field IDs for fonts.
|
439 |
|
|
*
|
440 |
|
|
* @param env the JNI environment
|
441 |
|
|
*/
|
442 |
|
|
void gtkpeer_init_font_IDs(JNIEnv* env)
|
443 |
|
|
{
|
444 |
|
|
jclass cls;
|
445 |
|
|
|
446 |
|
|
/* Find the nativeFont field ID in GdkFontPeer. */
|
447 |
|
|
cls = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GdkFontPeer");
|
448 |
|
|
fontFID = (*env)->GetFieldID(env, cls, "nativeFont",
|
449 |
|
|
"Lgnu/classpath/Pointer;");
|
450 |
|
|
}
|
451 |
|
|
|
452 |
|
|
/**
|
453 |
|
|
* Sets the native font in the nativeFont field in GdkFontPeer.
|
454 |
|
|
*
|
455 |
|
|
* @param env the JNI environment
|
456 |
|
|
* @param font_peer the font peer object
|
457 |
|
|
* @param font the actual native font reference
|
458 |
|
|
*/
|
459 |
|
|
void gtkpeer_set_font(JNIEnv* env, jobject font_peer, void* font)
|
460 |
|
|
{
|
461 |
|
|
jobject obj;
|
462 |
|
|
|
463 |
|
|
/* Fetch the nativeFont field object. */
|
464 |
|
|
obj = (*env)->GetObjectField(env, font_peer, fontFID);
|
465 |
|
|
if (obj == NULL)
|
466 |
|
|
{
|
467 |
|
|
/* Create if necessary. */
|
468 |
|
|
#if SIZEOF_VOID_P == 8
|
469 |
|
|
obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
|
470 |
|
|
(jlong) font);
|
471 |
|
|
#else
|
472 |
|
|
obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
|
473 |
|
|
(jint) font);
|
474 |
|
|
#endif
|
475 |
|
|
(*env)->SetObjectField(env, font_peer, fontFID, obj);
|
476 |
|
|
}
|
477 |
|
|
else
|
478 |
|
|
{
|
479 |
|
|
#if SIZEOF_VOID_P == 8
|
480 |
|
|
(*env)->SetLongField(env, obj, pointerDataFID, (jlong) font);
|
481 |
|
|
#else
|
482 |
|
|
(*env)->SetIntField(env, obj, pointerDataFID, (jint) font);
|
483 |
|
|
#endif
|
484 |
|
|
}
|
485 |
|
|
}
|
486 |
|
|
|
487 |
|
|
/**
|
488 |
|
|
* Fetches the native font reference from the GdkFontPeer object.
|
489 |
|
|
*
|
490 |
|
|
* @param env the JNI environment
|
491 |
|
|
* @param font_peer the font peer object
|
492 |
|
|
*
|
493 |
|
|
* @return the native font structure
|
494 |
|
|
*/
|
495 |
|
|
void* gtkpeer_get_font(JNIEnv* env, jobject font_peer)
|
496 |
|
|
{
|
497 |
|
|
jobject obj;
|
498 |
|
|
void *font;
|
499 |
|
|
|
500 |
|
|
/* Fetch the nativeFont field from the peer object. */
|
501 |
|
|
obj = (*env)->GetObjectField(env, font_peer, fontFID);
|
502 |
|
|
|
503 |
|
|
/* Fetch actual font pointer. */
|
504 |
|
|
#if SIZEOF_VOID_P == 8
|
505 |
|
|
font = (void*) (*env)->GetLongField(env, obj, pointerDataFID);
|
506 |
|
|
#else
|
507 |
|
|
font = (void*) (*env)->GetIntField(env, obj, pointerDataFID);
|
508 |
|
|
#endif
|
509 |
|
|
return font;
|
510 |
|
|
}
|
511 |
|
|
|
512 |
|
|
/**
|
513 |
|
|
* Initializes the field IDs for pixbuf decoder.
|
514 |
|
|
*
|
515 |
|
|
* @param env the JNI environment
|
516 |
|
|
*/
|
517 |
|
|
void gtkpeer_init_pixbuf_IDs(JNIEnv* env)
|
518 |
|
|
{
|
519 |
|
|
jclass cls;
|
520 |
|
|
|
521 |
|
|
/* Find the nativeFont field ID in GdkFontPeer. */
|
522 |
|
|
cls = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GdkPixbufDecoder");
|
523 |
|
|
pixbufLoaderFID = (*env)->GetFieldID(env, cls, "nativeDecoder",
|
524 |
|
|
"Lgnu/classpath/Pointer;");
|
525 |
|
|
}
|
526 |
|
|
|
527 |
|
|
/**
|
528 |
|
|
* Sets the native font in the nativeFont field in GdkFontPeer.
|
529 |
|
|
*
|
530 |
|
|
* @param env the JNI environment
|
531 |
|
|
* @param pixbuf_dec the pixbuf decoder object
|
532 |
|
|
* @param pixbuf_loader the native pixbuf loader
|
533 |
|
|
*/
|
534 |
|
|
void gtkpeer_set_pixbuf_loader(JNIEnv* env, jobject pixbuf_dec,
|
535 |
|
|
void* pixbuf_loader)
|
536 |
|
|
{
|
537 |
|
|
jobject obj;
|
538 |
|
|
|
539 |
|
|
/* Fetch the nativeDecoder field object. */
|
540 |
|
|
obj = (*env)->GetObjectField(env, pixbuf_dec, pixbufLoaderFID);
|
541 |
|
|
if (obj == NULL)
|
542 |
|
|
{
|
543 |
|
|
/* Create if necessary. */
|
544 |
|
|
#if SIZEOF_VOID_P == 8
|
545 |
|
|
obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
|
546 |
|
|
(jlong) pixbuf_loader);
|
547 |
|
|
#else
|
548 |
|
|
obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID,
|
549 |
|
|
(jint) pixbuf_loader);
|
550 |
|
|
#endif
|
551 |
|
|
(*env)->SetObjectField(env, pixbuf_dec, pixbufLoaderFID, obj);
|
552 |
|
|
}
|
553 |
|
|
else
|
554 |
|
|
{
|
555 |
|
|
#if SIZEOF_VOID_P == 8
|
556 |
|
|
(*env)->SetLongField(env, obj, pointerDataFID, (jlong) pixbuf_loader);
|
557 |
|
|
#else
|
558 |
|
|
(*env)->SetIntField(env, obj, pointerDataFID, (jint) pixbuf_loader);
|
559 |
|
|
#endif
|
560 |
|
|
}
|
561 |
|
|
}
|
562 |
|
|
|
563 |
|
|
/**
|
564 |
|
|
* Fetches the native pixbuf loader reference from the GdkPixbufDecoder object.
|
565 |
|
|
*
|
566 |
|
|
* @param env the JNI environment
|
567 |
|
|
* @param pixbuf_dec the pixbuf decoder object
|
568 |
|
|
*
|
569 |
|
|
* @return the native pixbuf loader
|
570 |
|
|
*/
|
571 |
|
|
void* gtkpeer_get_pixbuf_loader(JNIEnv* env, jobject pixbuf_dec)
|
572 |
|
|
{
|
573 |
|
|
jobject obj;
|
574 |
|
|
void *loader;
|
575 |
|
|
|
576 |
|
|
/* Fetch the nativeFont field from the peer object. */
|
577 |
|
|
obj = (*env)->GetObjectField(env, pixbuf_dec, pixbufLoaderFID);
|
578 |
|
|
|
579 |
|
|
/* Fetch actual font pointer. */
|
580 |
|
|
#if SIZEOF_VOID_P == 8
|
581 |
|
|
loader = (void*) (*env)->GetLongField(env, obj, pointerDataFID);
|
582 |
|
|
#else
|
583 |
|
|
loader = (void*) (*env)->GetIntField(env, obj, pointerDataFID);
|
584 |
|
|
#endif
|
585 |
|
|
return loader;
|
586 |
|
|
}
|