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comparison: testing/tools/screenshot/win32-screenshot.cpp
testing/tools/screenshot/win32-screenshot.cpp
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| 1 /* | |
| 2 * Copyright (c) 2009, The Mozilla Foundation | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions are met: | |
| 7 * * Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * * 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 * * Neither the name of the Mozilla Foundation nor the | |
| 13 * names of its contributors may be used to endorse or promote products | |
| 14 * derived from this software without specific prior written permission. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY The Mozilla Foundation ''AS IS'' AND ANY | |
| 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 19 * DISCLAIMED. IN NO EVENT SHALL The Mozilla Foundation BE LIABLE FOR ANY | |
| 20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 * | |
| 27 * Contributors: | |
| 28 * Ted Mielczarek <ted.mielczarek@gmail.com> | |
| 29 */ | |
| 30 /* | |
| 31 * screenshot.cpp : Save a screenshot of the Windows desktop in .png format. | |
| 32 * If a filename is specified as the first argument on the commandline, | |
| 33 * then the image will be saved to that filename. Otherwise, the image will | |
| 34 * be saved as "screenshot.png" in the current working directory. | |
| 35 */ | |
| 36 | |
| 37 #undef WIN32_LEAN_AND_MEAN | |
| 38 #include <windows.h> | |
| 39 #include <gdiplus.h> | |
| 40 | |
| 41 using namespace Gdiplus; | |
| 42 | |
| 43 // From http://msdn.microsoft.com/en-us/library/ms533843%28VS.85%29.aspx | |
| 44 static int GetEncoderClsid(const WCHAR* format, CLSID* pClsid) | |
| 45 { | |
| 46 UINT num = 0; // number of image encoders | |
| 47 UINT size = 0; // size of the image encoder array in bytes | |
| 48 | |
| 49 ImageCodecInfo* pImageCodecInfo = nullptr; | |
| 50 | |
| 51 GetImageEncodersSize(&num, &size); | |
| 52 if(size == 0) | |
| 53 return -1; // Failure | |
| 54 | |
| 55 pImageCodecInfo = (ImageCodecInfo*)(malloc(size)); | |
| 56 if(pImageCodecInfo == nullptr) | |
| 57 return -1; // Failure | |
| 58 | |
| 59 GetImageEncoders(num, size, pImageCodecInfo); | |
| 60 | |
| 61 for(UINT j = 0; j < num; ++j) | |
| 62 { | |
| 63 if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 ) | |
| 64 { | |
| 65 *pClsid = pImageCodecInfo[j].Clsid; | |
| 66 free(pImageCodecInfo); | |
| 67 return j; // Success | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 free(pImageCodecInfo); | |
| 72 return -1; // Failure | |
| 73 } | |
| 74 | |
| 75 #ifdef __MINGW32__ | |
| 76 extern "C" | |
| 77 #endif | |
| 78 int wmain(int argc, wchar_t** argv) | |
| 79 { | |
| 80 GdiplusStartupInput gdiplusStartupInput; | |
| 81 ULONG_PTR gdiplusToken; | |
| 82 GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, nullptr); | |
| 83 | |
| 84 HWND desktop = GetDesktopWindow(); | |
| 85 HDC desktopdc = GetDC(desktop); | |
| 86 HDC mydc = CreateCompatibleDC(desktopdc); | |
| 87 int width = GetSystemMetrics(SM_CXSCREEN); | |
| 88 int height = GetSystemMetrics(SM_CYSCREEN); | |
| 89 HBITMAP mybmp = CreateCompatibleBitmap(desktopdc, width, height); | |
| 90 HBITMAP oldbmp = (HBITMAP)SelectObject(mydc, mybmp); | |
| 91 BitBlt(mydc,0,0,width,height,desktopdc,0,0, SRCCOPY|CAPTUREBLT); | |
| 92 SelectObject(mydc, oldbmp); | |
| 93 | |
| 94 const wchar_t* filename = (argc > 1) ? argv[1] : L"screenshot.png"; | |
| 95 Bitmap* b = Bitmap::FromHBITMAP(mybmp, nullptr); | |
| 96 CLSID encoderClsid; | |
| 97 Status stat = GenericError; | |
| 98 if (b && GetEncoderClsid(L"image/png", &encoderClsid) != -1) { | |
| 99 stat = b->Save(filename, &encoderClsid, nullptr); | |
| 100 } | |
| 101 if (b) | |
| 102 delete b; | |
| 103 | |
| 104 // cleanup | |
| 105 GdiplusShutdown(gdiplusToken); | |
| 106 ReleaseDC(desktop, desktopdc); | |
| 107 DeleteObject(mybmp); | |
| 108 DeleteDC(mydc); | |
| 109 return stat == Ok ? 0 : 1; | |
| 110 } |
