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Python-监听并自动保存剪贴板图片到临时目录

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发表于 2021-1-16 11:27 |只看该作者 |倒序浏览

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#include <iostream>
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#include <Windows.h>
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extern "C" {+ J0 f: z# ]9 x7 T/ h
__declspec(dllexport) BOOL SaveBmp(HBITMAP hBitmap, const wchar_t* FileName);; Y8 ?3 \; {; N3 P+ E# {% u* B
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BOOL SaveBmp(HBITMAP hBitmap, const wchar_t* FileName)
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{
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//设备描述表( P ]. |6 Y5 @
HDC hDC;, k6 j6 e- c! n* }+ {7 ~
//当前分辨率下每象素所占字节数
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int iBits;
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//位图中每象素所占字节数7 d) v; Q) m1 G6 f- z
WORD wBitCount;9 P, C\" P1 T# p! F* o! n5 @
//定义调色板大小，位图中像素字节大小，位图文件大小，写入文件字节数 & @\" L# ]) L, f) x) }* h: X/ G
DWORD dwPaletteSize = 0, dwBmBitsSize = 0, dwDIBSize = 0, dwWritten = 0;
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//位图属性结构
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BITMAP Bitmap;4 V; M7 D- \# h# Q: B% v% G5 f! V
//位图文件头结构
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BITMAPFILEHEADER bmfHdr;
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//位图信息头结构
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BITMAPINFOHEADER bi;
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//指向位图信息头结构 ! y\" A* b# I/ K H$ r7 r
LPBITMAPINFOHEADER lpbi; I5 i/ p7 s* x# ]3 r* b
//定义文件，分配内存句柄，调色板句柄 9 B2 M# I) Z1 a7 \& \\" W
HANDLE fh, hDib, hPal, hOldPal = NULL;
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//计算位图文件每个像素所占字节数
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hDC = CreateDC(L"DISPLAY", NULL, NULL, NULL);+ A( }' J/ }$ v8 l0 _. u+ n
iBits = GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES);
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DeleteDC(hDC);
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if (iBits <= 1) wBitCount = 1;
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else if (iBits <= 4) wBitCount = 4;
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else if (iBits <= 8) wBitCount = 8;
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else wBitCount = 24;
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GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap);9 A& f\" Y5 R7 |\" S/ \
bi.biSize = sizeof(BITMAPINFOHEADER);
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bi.biWidth = Bitmap.bmWidth;
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bi.biHeight = Bitmap.bmHeight;
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bi.biPlanes = 1;
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bi.biBitCount = wBitCount;; J4 N) Z* B! D7 O( o1 T
bi.biCompression = BI_RGB;0 Q: [/ P/ U' t# W4 e
bi.biSizeImage = 0;7 \2 U8 K3 ~( N/ |
bi.biXPelsPerMeter = 0;
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bi.biYPelsPerMeter = 0;
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bi.biClrImportant = 0;9 A, V3 p9 I0 i& L/ {5 X
bi.biClrUsed = 0;
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dwBmBitsSize = ((Bitmap.bmWidth * wBitCount + 31) / 32) * 4 * Bitmap.bmHeight;. T* ]$ r. c! v\" G
//为位图内容分配内存
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hDib = GlobalAlloc(GHND, dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER));
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lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);4 z. l a% Q' L- X, K9 w$ f1 x# l
*lpbi = bi;8 j5 c' x% d% Q
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// 处理调色板
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hPal = GetStockObject(DEFAULT_PALETTE);* q7 i% q4 e3 z2 d
if (hPal)
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hDC = ::GetDC(NULL);
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hOldPal = ::SelectPalette(hDC, (HPALETTE)hPal, FALSE);
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RealizePalette(hDC);/ n M) {: K8 j4 n& o/ c
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// 获取该调色板下新的像素值 9 G6 x; k: o. C8 @! t
GetDIBits(hDC, hBitmap, 0, (UINT)Bitmap.bmHeight, (LPSTR)lpbi + sizeof(BITMAPINFOHEADER) + dwPaletteSize, (BITMAPINFO*)lpbi, DIB_RGB_COLORS);* }+ e2 x' S) v& Z
//恢复调色板 6 n* J$ e' ~. a/ z& l) p
if (hOldPal)
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::SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);/ Q; ~( s( }8 T |. t
RealizePalette(hDC);. K2 E+ _& q( k# |
::ReleaseDC(NULL, hDC);\" k- `/ T8 A. e; t, L0 @. b; y+ B8 L
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//创建位图文件
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fh = CreateFile(FileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);2 K, Q- c* Y* `+ w3 z\" w) d
if (fh == INVALID_HANDLE_VALUE) return FALSE;. A8 @0 g1 s* R
// 设置位图文件头
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bmfHdr.bfType = 0x4D42; // "BM"
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dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;
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bmfHdr.bfSize = dwDIBSize;
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bmfHdr.bfReserved1 = 0;2 h& J; d- _; s
bmfHdr.bfReserved2 = 0;1 K, z$ n+ ]/ m; R9 q
bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER) + dwPaletteSize;, W5 l% W% }- w: `0 \
// 写入位图文件头 % C7 P( `! z9 T) t0 w/ z
WriteFile(fh, (LPSTR)&bmfHdr, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);
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// 写入位图文件其余内容
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WriteFile(fh, (LPSTR)lpbi, dwDIBSize, &dwWritten, NULL);/ a) l6 M$ P; Z
//清除
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GlobalUnlock(hDib);
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GlobalFree(hDib);; q8 b1 i/ w- i! r2 \' o: Z% b W
CloseHandle(fh);4 G8 W1 d$ h d( x! e- ]
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return TRUE;
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