PixelDumpSupportWin.cpp revision d8543bb6618c17b12da906afa77d216f58cf4058 
1/*
2 * Copyright (C) 2007 Apple, Inc. All rights reserved.
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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "DumpRenderTree.h"
30#include "PixelDumpSupportCG.h"
31
32#include <CoreGraphics/CGBitmapContext.h>
33#include <wtf/Assertions.h>
34#include <wtf/RetainPtr.h>
35
36RetainPtr<CGContextRef> getBitmapContextFromWebView()
37{
38    RECT frame;
39    if (!GetWindowRect(webViewWindow, &frame))
40        return 0;
41
42    BITMAPINFO bmp = {0};
43    bmp.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
44    bmp.bmiHeader.biWidth = frame.right - frame.left;
45    bmp.bmiHeader.biHeight = -(frame.bottom - frame.top);
46    bmp.bmiHeader.biPlanes = 1;
47    bmp.bmiHeader.biBitCount = 32;
48    bmp.bmiHeader.biCompression = BI_RGB;
49
50    // FIXME: Currently we leak this HBITMAP because we don't have a good way
51    // to destroy it when the CGBitmapContext gets destroyed.
52    void* bits = 0;
53    HBITMAP bitmap = CreateDIBSection(0, &bmp, DIB_RGB_COLORS, &bits, 0, 0);
54
55    HDC memoryDC = CreateCompatibleDC(0);
56    SelectObject(memoryDC, bitmap);
57    SendMessage(webViewWindow, WM_PRINTCLIENT, reinterpret_cast<WPARAM>(memoryDC), PRF_CLIENT | PRF_CHILDREN | PRF_OWNED);
58    DeleteDC(memoryDC);
59
60    BITMAP info = {0};
61    GetObject(bitmap, sizeof(info), &info);
62    ASSERT(info.bmBitsPixel == 32);
63
64    RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB());
65    return RetainPtr<CGContextRef>(AdoptCF, CGBitmapContextCreate(info.bmBits, info.bmWidth, info.bmHeight, 8,
66                                                info.bmWidthBytes, colorSpace.get(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst));
67}
68