1 /* 2 * Copyright (c) 2009, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "awt.h" 27 #include "awt_ole.h" 28 #include "awt_DCHolder.h" // main symbols 29 30 31 //////////////////////// 32 // struct DCHolder 33 34 DCHolder::DCHolder() 35 : m_hMemoryDC(NULL), 36 m_iWidth(0), 37 m_iHeight(0), 38 m_bForImage(FALSE), 39 m_hBitmap(NULL), 40 m_hOldBitmap(NULL), 41 m_pPoints(NULL) 42 {} 43 44 void DCHolder::Create( 45 HDC hRelDC, 46 int iWidth, 47 int iHeght, 48 BOOL bForImage 49 ){ 50 OLE_DECL 51 m_iWidth = iWidth; 52 m_iHeight = iHeght; 53 m_bForImage = bForImage; 54 m_hMemoryDC = ::CreateCompatibleDC(hRelDC); 55 //NB: can not throw an error in non-safe stack!!! Just conversion and logging! 56 //OLE_WINERROR2HR just set OLE_HR without any throw! 57 if (!m_hMemoryDC) { 58 OLE_THROW_LASTERROR(_T("CreateCompatibleDC")) 59 } 60 m_hBitmap = m_bForImage 61 ? CreateJavaContextBitmap(hRelDC, m_iWidth, m_iHeight, &m_pPoints) 62 : ::CreateCompatibleBitmap(hRelDC, m_iWidth, m_iHeight); 63 if (!m_hBitmap) { 64 OLE_THROW_LASTERROR(_T("CreateCompatibleBitmap")) 65 } 66 m_hOldBitmap = (HBITMAP)::SelectObject(m_hMemoryDC, m_hBitmap); 67 if (!m_hOldBitmap) { 68 OLE_THROW_LASTERROR(_T("SelectBMObject")) 69 } 70 } 71 72 DCHolder::~DCHolder(){ 73 if (m_hOldBitmap) { 74 ::SelectObject(m_hMemoryDC, m_hOldBitmap); 75 } 76 if (m_hBitmap) { 77 ::DeleteObject(m_hBitmap); 78 } 79 if (m_hMemoryDC) { 80 ::DeleteDC(m_hMemoryDC); 81 } 82 }; 83 84 85 HBITMAP DCHolder::CreateJavaContextBitmap( 86 HDC hdc, 87 int iWidth, 88 int iHeight, 89 void **ppPoints) 90 { 91 BITMAPINFO bitmapInfo = {0}; 92 bitmapInfo.bmiHeader.biWidth = iWidth; 93 bitmapInfo.bmiHeader.biHeight = -iHeight; 94 bitmapInfo.bmiHeader.biPlanes = 1; 95 bitmapInfo.bmiHeader.biBitCount = 32; 96 bitmapInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); 97 bitmapInfo.bmiHeader.biCompression = BI_RGB; 98 99 return ::CreateDIBSection( 100 hdc, 101 (BITMAPINFO *)&bitmapInfo, 102 DIB_RGB_COLORS, 103 (void **)ppPoints, 104 NULL, 105 0 106 ); 107 }