1 /*
2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include "MyCanvas.h"
25 #include "jawt_md.h"
26
27 /*
28 * Class: MyCanvas
29 * Method: paint
30 * Signature: (Ljava/awt/Graphics;)V
31 */
Java_MyCanvas_paint(JNIEnv * env,jobject canvas,jobject graphics)32 JNIEXPORT void JNICALL Java_MyCanvas_paint
33 (JNIEnv* env, jobject canvas, jobject graphics)
34 {
35 JAWT awt;
36 JAWT_DrawingSurface* ds;
37 JAWT_DrawingSurfaceInfo* dsi;
38 JAWT_X11DrawingSurfaceInfo* dsi_x11;
39 jboolean result;
40 jint lock;
41 GC gc;
42 jobject ref;
43
44 /* Get the AWT */
45 awt.version = JAWT_VERSION_1_4;
46 if (JAWT_GetAWT(env, &awt) == JNI_FALSE) {
47 printf("AWT Not found\n");
48 return;
49 }
50
51 /* Lock the AWT */
52 awt.Lock(env);
53
54 /* Unlock the AWT */
55 awt.Unlock(env);
56
57 /* Get the drawing surface */
58 ds = awt.GetDrawingSurface(env, canvas);
59 if (ds == NULL) {
60 printf("NULL drawing surface\n");
61 return;
62 }
63
64 /* Lock the drawing surface */
65 lock = ds->Lock(ds);
66 printf("Lock value %d\n", (int)lock);
67 if((lock & JAWT_LOCK_ERROR) != 0) {
68 printf("Error locking surface\n");
69 awt.FreeDrawingSurface(ds);
70 return;
71 }
72
73 /* Get the drawing surface info */
74 dsi = ds->GetDrawingSurfaceInfo(ds);
75 if (dsi == NULL) {
76 printf("Error getting surface info\n");
77 ds->Unlock(ds);
78 awt.FreeDrawingSurface(ds);
79 return;
80 }
81
82 /* Get the platform-specific drawing info */
83 dsi_x11 = (JAWT_X11DrawingSurfaceInfo*)dsi->platformInfo;
84
85 /* Now paint */
86 gc = XCreateGC(dsi_x11->display, dsi_x11->drawable, 0, 0);
87 XSetForeground(dsi_x11->display, gc, 0);
88 XFillRectangle(dsi_x11->display, dsi_x11->drawable, gc,
89 5, 5, 90, 90);
90 XFreeGC(dsi_x11->display, gc);
91 ref = awt.GetComponent(env, (void*)(dsi_x11->drawable));
92 if (!(*env)->IsSameObject(env, ref, canvas)) {
93 printf("Error! Different objects!\n");
94 }
95
96 /* Free the drawing surface info */
97 ds->FreeDrawingSurfaceInfo(dsi);
98
99 /* Unlock the drawing surface */
100 ds->Unlock(ds);
101
102 /* Free the drawing surface */
103 awt.FreeDrawingSurface(ds);
104 }
105