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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>7 D$ J6 f; K/ k E
#include <Windows.h>0 s0 b+ s9 T+ @' }9 i
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extern "C" {* s0 T' |! y1 {2 T
__declspec(dllexport) BOOL SaveBmp(HBITMAP hBitmap, const wchar_t* FileName);
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BOOL SaveBmp(HBITMAP hBitmap, const wchar_t* FileName)% ~% D0 v1 O/ R4 y
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//设备描述表
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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 1 o1 A7 I g, ^- p9 Q9 j# q
DWORD dwPaletteSize = 0, dwBmBitsSize = 0, dwDIBSize = 0, dwWritten = 0;! l; {% x\" F1 C; ?( K
//位图属性结构 6 G\" f/ T- m, \6 c$ r' P
BITMAP Bitmap;- l% k. }* }* f' _9 S& D
//位图文件头结构' c1 N! b0 c& x1 j- \
BITMAPFILEHEADER bmfHdr;
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//位图信息头结构
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BITMAPINFOHEADER bi; ^; d/ ]0 l+ F# A3 N1 @5 V- K
//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 3 e* Z3 I5 s2 \
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);) p! y- `- u. _9 q2 b9 _* B9 _
iBits = GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES);
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DeleteDC(hDC);
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if (iBits <= 1) wBitCount = 1;/ a# z\" D* {$ K0 v H
else if (iBits <= 4) wBitCount = 4; A# u* l\" O. H6 s- m4 T$ F# |; x
else if (iBits <= 8) wBitCount = 8;# ]6 d& Q: m$ ]& R8 D
else wBitCount = 24;9 j3 E7 x: |8 ^+ O
GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap);5 @2 L! Z- m$ X9 \8 U) r
bi.biSize = sizeof(BITMAPINFOHEADER);' Z2 E! }7 ]0 H0 _0 b3 j o0 T
bi.biWidth = Bitmap.bmWidth;- }- C9 b6 o& t- M# w9 o( I% F
bi.biHeight = Bitmap.bmHeight;. `9 l1 w: |) Z r9 a* ~4 T
bi.biPlanes = 1;! a$ ^' T6 k7 u( k
bi.biBitCount = wBitCount;. d W4 Z/ w) i; m4 B\" O9 _
bi.biCompression = BI_RGB;+ E9 c/ O2 |9 m& g
bi.biSizeImage = 0;
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bi.biXPelsPerMeter = 0;
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bi.biYPelsPerMeter = 0;# M1 s* k& F/ J, O. r\" k4 g; q
bi.biClrImportant = 0;1 h! D7 q C5 J& }) ~
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 6 V* F# W6 u; }/ O- I1 Y4 ?/ j% B
hDib = GlobalAlloc(GHND, dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER));; y; w5 X9 Z2 A @5 T9 F
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);5 K4 _; j# m\" `2 d5 B6 s1 _$ R
if (hPal)
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{
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hDC = ::GetDC(NULL);. t# q- S8 `; _! c# u, Z- `
hOldPal = ::SelectPalette(hDC, (HPALETTE)hPal, FALSE);
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RealizePalette(hDC);* h$ ~8 m: l e! e8 ^/ \) J3 b
}
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// 获取该调色板下新的像素值
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GetDIBits(hDC, hBitmap, 0, (UINT)Bitmap.bmHeight, (LPSTR)lpbi + sizeof(BITMAPINFOHEADER) + dwPaletteSize, (BITMAPINFO*)lpbi, DIB_RGB_COLORS);
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//恢复调色板 + q\" X6 |& o9 \# u
if (hOldPal)
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::SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);
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RealizePalette(hDC);
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::ReleaseDC(NULL, hDC);, ^; _$ F. M6 _8 V
}
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//创建位图文件
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fh = CreateFile(FileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,! y\" U\" I\" I+ P
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" & L2 |3 ?6 y* k) ^3 r
dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;
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bmfHdr.bfSize = dwDIBSize;
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bmfHdr.bfReserved1 = 0;
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bmfHdr.bfReserved2 = 0;, f* B4 ^- ?! X: s
bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER) + dwPaletteSize;
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// 写入位图文件头 E+ R2 [. G C) L$ p O; s! v9 A
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);+ g: r7 [; ~6 n\" O1 }
//清除 ; I. k$ U$ L h6 A6 N( j, j* R! {
GlobalUnlock(hDib);
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GlobalFree(hDib);4 S: B* [# @1 D# c* _7 P0 g
CloseHandle(fh);
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return TRUE;* P J2 E8 N, A) O& D8 m8 j2 h2 l. U
}
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