C++实现屏幕反色

larwar

已于 2022-12-22 17:06:13 修改

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分类专栏： C++窗口编程文章标签： c++ 开发语言后端 windows visualstudio

于 2022-01-18 21:39:44 首次发布

本文链接：https://blog.youkuaiyun.com/larwar/article/details/122569146

方法一：

思路：获取屏幕图像，反色后，设置为壁纸。

头文件：#include <windows.h>

#include <vector.h>
#include <cstdio>
#include <string>
#include <tchar.h>

代码：（调用Screenshot反转颜色）



BOOL GetHDCData(HDC hdc, const RECT& rcDC, std::vector<BYTE>& vtBuf)
{
    BOOL bRes = FALSE;
    HBITMAP hBmp = NULL;
    HDC hdcMem = NULL;

    __try
    {
        //Initilaize the bitmap information	
        BITMAPINFO bmpInfo = { 0 };
        bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
        bmpInfo.bmiHeader.biWidth = rcDC.right - rcDC.left;
        bmpInfo.bmiHeader.biHeight = rcDC.bottom - rcDC.top;
        bmpInfo.bmiHeader.biPlanes = 1;
        bmpInfo.bmiHeader.biBitCount = 24;

        //Create the compatible DC to get the data
        hdcMem = CreateCompatibleDC(hdc);
        if (hdcMem == NULL)
        {
            //ASSERT(FALSE);
            //RETAILMSG(TRUE,(TEXT("CreateCompatibleDC failed! Error Code:0x%x\r\n"),GetLastError()));
            __leave;
        }

        //Get the data from the memory DC	
        BYTE* pData = NULL;
        hBmp = CreateDIBSection(hdcMem, &bmpInfo, DIB_RGB_COLORS, reinterpret_cast<VOID**>(&pData), NULL, 0);
        if (hBmp == NULL)
        {
            //ASSERT(FALSE);
            //RETAILMSG(TRUE,(TEXT("CreateDIBSection failed! Error Code:0x%x\r\n"),GetLastError()));
            __leave;
        }
        HGDIOBJ hOldObj = SelectObject(hdcMem, hBmp);

        //Draw to the memory DC
        SIZE sizeImg = { bmpInfo.bmiHeader.biWidth,bmpInfo.bmiHeader.biHeight };
        SIZE sizeDC = { rcD