C++中的ReadConsoleOutputAttribute函数用法

Question

我需要在 C++ 中通过已知坐标获取背景颜色。我尝试使用 windows.h 中的 ReadConsoleOutputAttribute，但没有成功。这是我的代码：

HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE);
DWORD count;
COORD cursor = { this->X, this->Y };
LPWORD *lpAttr = new LPWORD;
CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(console, &info);

ReadConsoleOutputAttribute(console, *lpAttr, 1, cursor, &count);

这里出了什么问题，有什么解决方法？我应该从 lpAttr 或什么获取背景颜色？

Answer 1

颜色属性由两个十六进制数字指定 -- 第一个对应背景；第二个前景。每个数字可以是以下任何值：

0 = Black       8 = Gray
1 = Blue        9 = Light Blue
2 = Green       A = Light Green
3 = Aqua        B = Light Aqua
4 = Red         C = Light Red
5 = Purple      D = Light Purple
6 = Yellow      E = Light Yellow
7 = White       F = Bright White

我们只需要提取十六进制结果的第一位就可以知道当前coordinate.This的背景颜色是我的测试代码。我修改了鼠标坐标点以简化测试

#include <Windows.h>
#include <iostream>

using namespace std;

int main()
{
    //color set test
    system("color F0");
    std::cout << "Hello World!\n" << endl;

    HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
    if (!Console)
        return 0;

    CONSOLE_SCREEN_BUFFER_INFO buf;
    GetConsoleScreenBufferInfo(Console, &buf);

    WORD Attr;
    DWORD Count;
    COORD pos = buf.dwCursorPosition;
    ReadConsoleOutputAttribute(Console, &Attr, 1, pos, &Count);

    //hexadecimal out
    cout  << hex << Attr << endl;
    
    if (Attr)
    {   //extract the first digit of the hexadecimal result
        int color = Attr / 16;
        switch (color)
        {
           case 0:cout  << " background color is Black. "     << endl; break;
           case 1:cout  << " background color is Blue. "      << endl;break;
           case 2:cout  << " background color is Green . "    << endl; break;
           case 3:cout  << " background color is Aqua. "      << endl; break;
           case 4:cout  << " background color is Red. "       << endl; break;
           case 5:cout  << " background color is Purple . "   << endl; break;
           case 6:cout  << " background color is Yellow. "    << endl; break;
           case 7:cout  << " background color is White. "     << endl; break;
           case 8:cout  << " background color is Gray . "     << endl; break;
           case 9:cout  << " background color is Light Blue." << endl; break;
           case 10:cout << " background color is Light Green." << endl; break;      //A
           case 11:cout << " background color is Light Aqua ." << endl; break;      //B
           case 12:cout << " background color is Light Red . " << endl; break;      //C
           case 13:cout << " background color is Light Purple . " << endl; break;   //D
           case 14:cout << " background color is Light Yellow . " << endl; break;   //E
           case 15:cout << " background color is Bright White . " << endl; break;   //F
           default:
               cout << " error color " << endl;
               break;
        }
    }

    return 0;
}

C++中的ReadConsoleOutputAttribute函数用法

ReadConsoleOutputAttribute function usage in c++

c++

console

winapi

console-application