熟悉图形处理的 帮咱看看的 我把咱的分都送你

Question

DWORD FindColor(LPVOID lParam)
{
HDC hDCscreen = GetDC(NULL);
int nWidth = 20,nHeight = 20;
BYTE R,G,B;
HDC hComDC = CreateCompatibleDC(hDCscreen);
BITMAPINFO bmpInfo;
HBITMAP hComBitMap = CreateCompatibleBitmap(hDCscreen,nWidth,nHeight);
HGDIOBJ OldHgdobj = SelectObject(hComDC,hComBitMap);
BitBlt(hComDC,0,0,nWidth,nHeight,hDCscreen,0,0,SRCCOPY);
HANDLE hHeap = GetProcessHeap();
    LPVOID lpBuffer = HeapAlloc(hHeap,HEAP_ZERO_MEMORY,nHeight*nWidth*4);
ZeroMemory(&bmpInfo,sizeof(bmpInfo));
bmpInfo.bmiHeader.biBitCount = 32;
bmpInfo.bmiHeader.biCompression = BI_RGB;
bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmpInfo.bmiHeader.biWidth = nWidth;
bmpInfo.bmiHeader.biHeight = nHeight;
bmpInfo.bmiHeader.biPlanes = 1;
bmpInfo.bmiHeader.biSizeImage = 0;
DWORD Color = NULL,a=0; printf("被扫描行数%d\n",GetDIBits(hComDC,hComBitMap,0,bmpInfo.bmiHeader.biHeight,lpBuffer,&bmpInfo,DIB_RGB_COLORS));
for (int h = nHeight;h >= 0;h--)
{
for(int w = 0; w<nWidth ; w++)
{
/*RGB GBR*/
memcpy(&Color,LPVOID((int)lpBuffer  + h * w * 4 + 1),3);//32位色最高字节表示Alpha？
printf("坐标 - X：%d Y：%d 颜色:%X\n",w, h,Color);
SetPixel(hDCscreen,w,h,Color);//设置目标区域的颜色,结果目标区域模糊 设置目标区域的颜色,结果目标区域模糊!我想大家帮忙修改我的函数 让目标区域不会乱
}
}
HeapFree(hHeap,HEAP_NO_SERIALIZE,lpBuffer);
ReleaseDC(NULL,hDCscreen);
ReleaseDC(NULL,hComDC);
DeleteObject(OldHgdobj);
DeleteObject(hComBitMap);
return FALSE;
}

Answer 1

一个color里面有4个byte，分别装R/G/B/Alpha
memcpy(&Color,LPVOID((BYTE*)lpBuffer  + h * w * 4),4);

Answer 2

DWORD FindColor(LPVOID lParam)
{
    HDC hDCscreen = GetDC(NULL);
    int nWidth = 20,nHeight = 20;
    BYTE R,G,B;
    HDC hComDC = CreateCompatibleDC(hDCscreen);
    BITMAPINFO bmpInfo;
    HBITMAP hComBitMap = CreateCompatibleBitmap(hDCscreen,nWidth,nHeight);
    HGDIOBJ OldHgdobj = SelectObject(hComDC,hComBitMap);
    BitBlt(hComDC,0,0,nWidth,nHeight,hDCscreen,0,0,SRCCOPY);
    HANDLE hHeap = GetProcessHeap();
    LPVOID lpBuffer = HeapAlloc(hHeap,HEAP_ZERO_MEMORY,nHeight*nWidth*4);
    ZeroMemory(&bmpInfo,sizeof(bmpInfo));
    bmpInfo.bmiHeader.biBitCount = 32;
    bmpInfo.bmiHeader.biCompression = BI_RGB;
    bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmpInfo.bmiHeader.biWidth = nWidth;
    bmpInfo.bmiHeader.biHeight = nHeight;
    bmpInfo.bmiHeader.biPlanes = 1;
    bmpInfo.bmiHeader.biSizeImage = 0;
    RGBQUAD Color ;

    printf("被扫描行数%d\n",GetDIBits(hComDC,hComBitMap,0,bmpInfo.bmiHeader.biHeight,lpBuffer,&bmpInfo,DIB_RGB_COLORS));
    for (int h = nHeight-1;h >= 0;--h)
    {
        for(int w = 0; w<nWidth ; ++w)
        {
            /*RGB GBR*/
            memcpy(&Color,LPVOID((RGBQUAD*)lpBuffer  + (nWidth*h + w)),3);//32位色最高字节表示Alpha？
            printf("坐标 - X：%d Y：%d 颜色:RGB(%02X,%02X,%02X)\n",w,nHeight-1-h,Color.rgbRed,Color.rgbGreen,Color.rgbBlue);
            SetPixel(hDCscreen,w,nHeight-1-h,RGB(Color.rgbRed,Color.rgbGreen,Color.rgbBlue));
//设置目标区域的颜色,结果目标区域模糊 设置目标区域的颜色,结果目标区域模糊!我想大家帮忙修改我的函数 让目标区域不会乱
        }
    }
    HeapFree(hHeap,HEAP_NO_SERIALIZE,lpBuffer);
    ReleaseDC(NULL,hDCscreen);
    ReleaseDC(NULL,hComDC);
    DeleteObject(OldHgdobj);
    DeleteObject(hComBitMap);
    return FALSE;
}