1 /*
2 * Copyright (C) 2011 Brent Fulgham <bfulgham@webkit.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "DIBPixelData.h"
28
29 namespace WebCore {
30
31 static const WORD bitmapType = 0x4d42; // BMP format
32 static const WORD bitmapPixelsPerMeter = 2834; // 72 dpi
33
DIBPixelData(HBITMAP bitmap)34 DIBPixelData::DIBPixelData(HBITMAP bitmap)
35 {
36 initialize(bitmap);
37 }
38
initialize(HBITMAP bitmap)39 void DIBPixelData::initialize(HBITMAP bitmap)
40 {
41 BITMAP bmpInfo;
42 GetObject(bitmap, sizeof(bmpInfo), &bmpInfo);
43
44 m_bitmapBuffer = reinterpret_cast<UInt8*>(bmpInfo.bmBits);
45 m_bitmapBufferLength = bmpInfo.bmWidthBytes * bmpInfo.bmHeight;
46 m_size = IntSize(bmpInfo.bmWidth, bmpInfo.bmHeight);
47 m_bytesPerRow = bmpInfo.bmWidthBytes;
48 m_bitsPerPixel = bmpInfo.bmBitsPixel;
49 }
50
51 #ifndef NDEBUG
writeToFile(LPCWSTR filePath)52 void DIBPixelData::writeToFile(LPCWSTR filePath)
53 {
54 HANDLE hFile = ::CreateFile(filePath, GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
55 if (INVALID_HANDLE_VALUE == hFile)
56 return;
57
58 BITMAPFILEHEADER header;
59 header.bfType = bitmapType;
60 header.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
61 header.bfReserved1 = 0;
62 header.bfReserved2 = 0;
63 header.bfSize = sizeof(BITMAPFILEHEADER);
64
65 BITMAPINFOHEADER info;
66 info.biSize = sizeof(BITMAPINFOHEADER);
67 info.biWidth = m_size.width();
68 info.biHeight = m_size.height();
69 info.biPlanes = 1;
70 info.biBitCount = m_bitsPerPixel;
71 info.biCompression = BI_RGB;
72 info.biSizeImage = bufferLength();
73 info.biXPelsPerMeter = bitmapPixelsPerMeter;
74 info.biYPelsPerMeter = bitmapPixelsPerMeter;
75 info.biClrUsed = 0;
76 info.biClrImportant = 0;
77
78 DWORD bytesWritten = 0;
79 ::WriteFile(hFile, &header, sizeof(header), &bytesWritten, 0);
80 ::WriteFile(hFile, &info, sizeof(info), &bytesWritten, 0);
81 ::WriteFile(hFile, buffer(), bufferLength(), &bytesWritten, 0);
82
83 ::CloseHandle(hFile);
84 }
85 #endif
86
87 } // namespace WebCore
88