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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>' e: U3 u& O& Q: O0 A
#include <Windows.h>
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extern "C" {2 N0 R: e. O2 Q\" w: q
__declspec(dllexport) BOOL SaveBmp(HBITMAP hBitmap, const wchar_t* FileName);\" B7 \$ z/ c3 S
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BOOL SaveBmp(HBITMAP hBitmap, const wchar_t* FileName)9 v* ?0 f( p\" w( ]( d
{
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//设备描述表. z' s( W, V\" F$ Q U: C
HDC hDC;
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//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
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WORD wBitCount;
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//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 : J7 f% |; k: ?! A
DWORD dwPaletteSize = 0, dwBmBitsSize = 0, dwDIBSize = 0, dwWritten = 0;% k% O# b# A( a; k7 S
//位图属性结构 9 o! d- [( \$ q0 J+ o
BITMAP Bitmap;
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//位图文件头结构7 T# s P3 O6 A0 ?- n) e
BITMAPFILEHEADER bmfHdr;$ ^; w) y+ ^* [# `* }( _) G, J G
//位图信息头结构
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BITMAPINFOHEADER bi;, a& S\" d/ l' Z% p
//指向位图信息头结构
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LPBITMAPINFOHEADER lpbi;
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//定义文件，分配内存句柄，调色板句柄
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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);; B$ o8 k- F\" f$ J. L$ }+ t
iBits = GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES);# ?5 u% ~1 J, R) n
DeleteDC(hDC);
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if (iBits <= 1) wBitCount = 1;3 Y9 C6 u, A8 u7 L
else if (iBits <= 4) wBitCount = 4;( b( S X) x3 `0 T7 j/ k
else if (iBits <= 8) wBitCount = 8;
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else wBitCount = 24;' B4 a, r7 M* V
GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap);& v- q3 q2 Y, }( W- ~
bi.biSize = sizeof(BITMAPINFOHEADER);# f+ W ?# N5 n+ ?
bi.biWidth = Bitmap.bmWidth;* E) A( a0 R: p& b0 l9 r
bi.biHeight = Bitmap.bmHeight;, V8 @* _0 z! Z$ v* ^2 M% O
bi.biPlanes = 1;, T# o1 O+ ?( t2 e. ]; |8 x
bi.biBitCount = wBitCount;9 A9 V) X2 }\" f
bi.biCompression = BI_RGB;
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bi.biSizeImage = 0;6 m% k3 J5 a- ^2 F. ]% p, y
bi.biXPelsPerMeter = 0;
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bi.biYPelsPerMeter = 0;
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bi.biClrImportant = 0;
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bi.biClrUsed = 0;
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dwBmBitsSize = ((Bitmap.bmWidth * wBitCount + 31) / 32) * 4 * Bitmap.bmHeight;
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//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);
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*lpbi = bi;
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// 处理调色板
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hPal = GetStockObject(DEFAULT_PALETTE);
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if (hPal)
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{
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hDC = ::GetDC(NULL);
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hOldPal = ::SelectPalette(hDC, (HPALETTE)hPal, FALSE);6 w8 g' T, E' A s: i' A
RealizePalette(hDC);9 z/ R+ y- D5 e* U! h# O i: w, C/ o# _
}
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// 获取该调色板下新的像素值 # n- a$ ~% |\" [' D) Q\" W! }. p
GetDIBits(hDC, hBitmap, 0, (UINT)Bitmap.bmHeight, (LPSTR)lpbi + sizeof(BITMAPINFOHEADER) + dwPaletteSize, (BITMAPINFO*)lpbi, DIB_RGB_COLORS);7 z# }0 c% @3 P5 Y% H1 O
//恢复调色板 $ v0 H& t$ h+ I$ B6 k9 f
if (hOldPal)
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::SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);
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RealizePalette(hDC);6 v# Q# O% H( i
::ReleaseDC(NULL, hDC);+ g\" V S: H# E9 d) R7 e) _# i
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//创建位图文件
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fh = CreateFile(FileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,' f' A% W# U' P: l9 h, p5 r' m, V
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);
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if (fh == INVALID_HANDLE_VALUE) return FALSE;
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// 设置位图文件头
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bmfHdr.bfType = 0x4D42; // "BM" : g- v5 X* R& ]8 l1 ^+ \3 n
dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;
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bmfHdr.bfSize = dwDIBSize;: `: e( m$ t( v3 c8 Y2 E
bmfHdr.bfReserved1 = 0;
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bmfHdr.bfReserved2 = 0;
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bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER) + dwPaletteSize;
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// 写入位图文件头
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WriteFile(fh, (LPSTR)&bmfHdr, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);* ~& e2 ~$ S4 V* a# s
// 写入位图文件其余内容 & R; a+ ^1 L r+ M
WriteFile(fh, (LPSTR)lpbi, dwDIBSize, &dwWritten, NULL);# B1 M) R\" t\" I7 F4 O1 {! w8 l% K
//清除 $ ~, R* q; A7 W1 j( j/ Z
GlobalUnlock(hDib);. C- x6 w6 ^: x# a7 N
GlobalFree(hDib);. ^7 v4 p9 W) V5 _8 i
CloseHandle(fh);; A5 ?. j) H, c# u' x! O! D
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return TRUE;
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}
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