1.定义点函数:
SetPixel(hDC,x,y,crColor); hDC为句柄,x,y为点坐标,crColor为颜色。
GetPixel(hDC,x,y)获取该点的像素点;
COLORREF crColor = GetPixel(hDC,x,y);
2.画直线:
a.利用MoveToEx函数和LineTo函数:
MoveToEx(hDC, x, y,NULL);//定义一个点,起点
LineTo(hDC,xEnd,yEnd); //连线到终点
b.利用Polyline函数:
//产生个矩阵
POINT apt[5]={100,100,200,100,200,200,100,200,100,100};
MoveToEx(hDC,apt[0].x,apt[0].y,NULL);
(1).for (int i=1;i<5;i++) LineTo(hDC,apt[i].x,apt[i].y);
(2).Polyline(hDC,apt,5);
(3).MoveToEx(hDC,apt[0].x,apt[0].y,NULL)'
PolylineTo(hDC,apt+1,5);
(4).Rectangle(hDC,xLeft,yTop,xRight,yBottom);
//产生圆
Ellipse(hDC,xLeft,yTop,xRight,yBottom);
//圆角矩阵
RoundRect(hDC,xLeft,yTop,xRight,yBottom,xCornerEllipse,yCornerEllipse);
//弧形
Arc(hDC,xLeft,yTop,xRight,yBottom,xStart,yStart,xEnd,yEnd);
//椭圆弓形
Chord(hDC,xLeft,yTop,xRight,yBottom,xStart,yStart,xEnd,yEnd);
//扇形
Pie(hDC,xLeft,yTop,xRight,yBottom,xStart,yStart,xEnd,yEnd);
3.彩图:
(1).创建画笔:CreatePen函数和CreatePenIndirect函数
hPen = CreatePen(iPenStyle, iWidth, crColor);
(2)选择画笔: SelectObject(hDc,hPen1);
(3)删除画笔: DeleteObject(hPen1);
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
HPEN hPen;//定义画笔
hDC=BeginPaint(hwnd,&ps);
LOGPEN logpen;//定义逻辑画笔
logpen.lopnStyle = PS_SOLID;//设置线型为实线
logpen.lopnWidth.x = 3; //设置画笔宽度
logpen.lopnColor = RGB(255,0,0);//设置直线为红色
hPen = CreatePenIndirect(&logpen);//
SelectObject(hDC,hPen);//选择画笔
Rectangle(hDC,100,100,300,300);//画矩阵
EndPaint(hwnd,&ps);
DeleteObject(hPen);//删除画笔
break;
4.颜色定义:
a.COLORREF RGB{
BYTEbyRed,
BYTEbyGreen,
BYTEbyBlue
};
调用方法为:COLORREF color = RGB(0,255,0)表示为绿色
b. RGB_value struct{
byte unused;
byte blue;
byte green;
byte red;}