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
DCHolder()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
Create(HDC hRelDC,int iWidth,int iHeght,BOOL bForImage)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
~DCHolder()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
CreateJavaContextBitmap(HDC hdc,int iWidth,int iHeight,void ** ppPoints)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 }
108