如何使用C#获得X,Y处像素的颜色? [英] How to get the colour of a pixel at X,Y using c#?
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问题描述
如何使用c#获取X,Y处像素的颜色?
How do I get the color of a pixel at X,Y using c#?
关于结果,我可以将结果转换为我的颜色格式 需要.我确定对此有一个API调用.
As for the result, I can convert the results to the color format I need. I am sure there is an API call for this.
对于显示器上任何给定的X,Y,我想获得它的颜色 像素.
For any given X,Y on the monitor, I want to get the color of that pixel.
推荐答案
To get a pixel color from the Screen here's code from Pinvoke.net:
using System;
using System.Drawing;
using System.Runtime.InteropServices;
sealed class Win32
{
[DllImport("user32.dll")]
static extern IntPtr GetDC(IntPtr hwnd);
[DllImport("user32.dll")]
static extern Int32 ReleaseDC(IntPtr hwnd, IntPtr hdc);
[DllImport("gdi32.dll")]
static extern uint GetPixel(IntPtr hdc, int nXPos, int nYPos);
static public System.Drawing.Color GetPixelColor(int x, int y)
{
IntPtr hdc = GetDC(IntPtr.Zero);
uint pixel = GetPixel(hdc, x, y);
ReleaseDC(IntPtr.Zero, hdc);
Color color = Color.FromArgb((int)(pixel & 0x000000FF),
(int)(pixel & 0x0000FF00) >> 8,
(int)(pixel & 0x00FF0000) >> 16);
return color;
}
}
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