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 <windows.h>
25#include "MyCanvas.h"
26#include "jawt_md.h"
27
28/*
29 * Class:     MyCanvas
30 * Method:    paint
31 * Signature: (Ljava/awt/Graphics;)V
32 */
33
34extern "C" {
35
36JNIEXPORT void JNICALL Java_MyCanvas_paint
37(JNIEnv* env, jobject canvas, jobject graphics)
38{
39    /* Get the AWT */
40    JAWT awt;
41    awt.version = JAWT_VERSION_1_4;
42    if (JAWT_GetAWT(env, &awt) == JNI_FALSE) {
43        printf("AWT Not found\n");
44        return;
45    }
46
47    /* Lock the AWT */
48    awt.Lock(env);
49
50    /* Unlock the AWT */
51    awt.Unlock(env);
52
53    /* Get the drawing surface */
54    JAWT_DrawingSurface* ds = awt.GetDrawingSurface(env, canvas);
55    if (ds == NULL) {
56        printf("NULL drawing surface\n");
57        return;
58    }
59
60    /* Lock the drawing surface */
61    jint lock = ds->Lock(ds);
62    printf("Lock value %d\n", (int)lock);
63    if((lock & JAWT_LOCK_ERROR) != 0) {
64        printf("Error locking surface\n");
65        return;
66    }
67
68    /* Get the drawing surface info */
69    JAWT_DrawingSurfaceInfo* dsi = ds->GetDrawingSurfaceInfo(ds);
70    if (dsi == NULL) {
71        printf("Error getting surface info\n");
72        ds->Unlock(ds);
73        return;
74    }
75
76    /* Get the platform-specific drawing info */
77    JAWT_Win32DrawingSurfaceInfo* dsi_win =
78        (JAWT_Win32DrawingSurfaceInfo*)dsi->platformInfo;
79
80    /* Now paint */
81    PAINTSTRUCT ps;
82    /* Do not use the HDC returned from BeginPaint()!! */
83    ::BeginPaint(dsi_win->hwnd, &ps);
84    HBRUSH hbrush = (HBRUSH)::GetStockObject(BLACK_BRUSH);
85    RECT rect;
86    rect.left = 5;
87    rect.top = 5;
88    rect.right = 95;
89    rect.bottom = 95;
90    ::FillRect(dsi_win->hdc, &rect, hbrush);
91    ::EndPaint(dsi_win->hwnd, &ps);
92
93    jobject ref = awt.GetComponent(env, (void*)(dsi_win->hwnd));
94    if (!env->IsSameObject(ref, canvas)) {
95        printf("Error! Different objects!\n");
96    }
97
98    /* Free the drawing surface info */
99    ds->FreeDrawingSurfaceInfo(dsi);
100
101    /* Unlock the drawing surface */
102    ds->Unlock(ds);
103
104    /* Free the drawing surface */
105    awt.FreeDrawingSurface(ds);
106}
107
108}
109