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