109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
/*
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* Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <windows.h>
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#include "MyCanvas.h"
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#include "jawt_md.h"
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/*
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* Class: MyCanvas
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* Method: paint
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* Signature: (Ljava/awt/Graphics;)V
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*/
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extern "C" {
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JNIEXPORT void JNICALL Java_MyCanvas_paint
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(JNIEnv* env, jobject canvas, jobject graphics)
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{
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/* Get the AWT */
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JAWT awt;
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awt.version = JAWT_VERSION_1_4;
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if (JAWT_GetAWT(env, &awt) == JNI_FALSE) {
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printf("AWT Not found\n");
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return;
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}
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/* Lock the AWT */
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awt.Lock(env);
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/* Unlock the AWT */
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awt.Unlock(env);
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/* Get the drawing surface */
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JAWT_DrawingSurface* ds = awt.GetDrawingSurface(env, canvas);
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if (ds == nullptr) {
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printf("null drawing surface\n");
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return;
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}
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/* Lock the drawing surface */
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jint lock = ds->Lock(ds);
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printf("Lock value %d\n", (int)lock);
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if((lock & JAWT_LOCK_ERROR) != 0) {
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printf("Error locking surface\n");
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return;
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}
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/* Get the drawing surface info */
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JAWT_DrawingSurfaceInfo* dsi = ds->GetDrawingSurfaceInfo(ds);
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if (dsi == nullptr) {
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printf("Error getting surface info\n");
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ds->Unlock(ds);
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return;
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}
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/* Get the platform-specific drawing info */
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JAWT_Win32DrawingSurfaceInfo* dsi_win =
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(JAWT_Win32DrawingSurfaceInfo*)dsi->platformInfo;
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/* Now paint */
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PAINTSTRUCT ps;
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/* Do not use the HDC returned from BeginPaint()!! */
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::BeginPaint(dsi_win->hwnd, &ps);
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HBRUSH hbrush = (HBRUSH)::GetStockObject(BLACK_BRUSH);
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RECT rect;
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rect.left = 5;
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rect.top = 5;
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rect.right = 95;
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rect.bottom = 95;
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::FillRect(dsi_win->hdc, &rect, hbrush);
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::EndPaint(dsi_win->hwnd, &ps);
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jobject ref = awt.GetComponent(env, (void*)(dsi_win->hwnd));
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if (!env->IsSameObject(ref, canvas)) {
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printf("Error! Different objects!\n");
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}
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/* Free the drawing surface info */
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ds->FreeDrawingSurfaceInfo(dsi);
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/* Unlock the drawing surface */
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ds->Unlock(ds);
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/* Free the drawing surface */
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awt.FreeDrawingSurface(ds);
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}
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}
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