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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>. j0 I G- }/ k8 R& e3 W. N, `
#include <Windows.h>
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extern "C" {
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__declspec(dllexport) BOOL SaveBmp(HBITMAP hBitmap, const wchar_t* FileName);
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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
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HDC hDC;
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//当前分辨率下每象素所占字节数 Y, ], P9 m- _
int iBits;( ~. h# J' e2 @
//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
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DWORD dwPaletteSize = 0, dwBmBitsSize = 0, dwDIBSize = 0, dwWritten = 0;
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//位图属性结构 m9 }$ E$ L\" t+ [! l5 c; l1 ^
BITMAP Bitmap;
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//位图文件头结构\" W5 |5 v7 k: v2 x. s
BITMAPFILEHEADER bmfHdr;
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//位图信息头结构 8 J; ?! b0 N4 D, q3 c# S8 G3 q
BITMAPINFOHEADER bi;! u7 j0 l2 e8 a2 B! T
//指向位图信息头结构
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LPBITMAPINFOHEADER lpbi;) G$ m. K' M' r( O
//定义文件，分配内存句柄，调色板句柄 : o. s) X2 B5 j* f
HANDLE fh, hDib, hPal, hOldPal = NULL;, ^0 e: I; C: x
//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);* e6 T) M5 o, }: R, n1 W2 l4 c) [2 T& V
iBits = GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES);
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DeleteDC(hDC);
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if (iBits <= 1) wBitCount = 1;8 L( v7 t! t3 t; D( M
else if (iBits <= 4) wBitCount = 4;# b' I: W& i5 y) ?' K- `6 ^( C
else if (iBits <= 8) wBitCount = 8;
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else wBitCount = 24;
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GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap);% d( f' x# z7 b- x: e A2 b/ o+ b1 \) A
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;5 c! X3 P6 {6 J' b4 l3 [
bi.biCompression = BI_RGB;
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bi.biSizeImage = 0;
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bi.biXPelsPerMeter = 0;6 K, ?# ~$ S9 r\" W- r, M3 f: q& U
bi.biYPelsPerMeter = 0;0 h. r$ [) F5 ^
bi.biClrImportant = 0;
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bi.biClrUsed = 0;
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dwBmBitsSize = ((Bitmap.bmWidth * wBitCount + 31) / 32) * 4 * Bitmap.bmHeight;7 H7 Z# o$ d) b! e* g; C$ D; k/ \5 h
//为位图内容分配内存 , t, q\" b5 M- Y3 W) U6 U
hDib = GlobalAlloc(GHND, dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER));+ F2 [& Y. H8 N5 L\" C) N
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);
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*lpbi = bi;
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// 处理调色板 ) G\" e1 d4 r: j2 h; C, q6 J
hPal = GetStockObject(DEFAULT_PALETTE);4 m+ \- [! K6 P* Y0 L. l
if (hPal)
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hDC = ::GetDC(NULL);# y4 ?+ [\" h9 I- }) |: E
hOldPal = ::SelectPalette(hDC, (HPALETTE)hPal, FALSE);3 f6 d+ D, b# q- l$ g( v
RealizePalette(hDC);
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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
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if (hOldPal)1 i/ T1 |* D- ]+ I# B5 ]
{
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::SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);
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RealizePalette(hDC);) R! }9 x# X9 q- L l
::ReleaseDC(NULL, hDC);
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//创建位图文件
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fh = CreateFile(FileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, z. V0 a) M! v% [% T8 a
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);) n& @4 f* }9 W+ m8 K
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"
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dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;
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bmfHdr.bfSize = dwDIBSize;) M& W9 l7 j2 _6 V* E, [\" r
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 \" ]% h( p* M0 i8 e4 o
WriteFile(fh, (LPSTR)&bmfHdr, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);
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// 写入位图文件其余内容 + f `' c2 c* H
WriteFile(fh, (LPSTR)lpbi, dwDIBSize, &dwWritten, NULL);; G\" Q9 d( X9 O+ t& W2 X
//清除 + [- A( e! Q& ^' X\" W( T- j# k
GlobalUnlock(hDib);
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GlobalFree(hDib);% w7 a A9 V Z7 x3 ?
CloseHandle(fh);5 a0 @9 {. P8 i; b9 y) E! d. ~
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return TRUE;
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