【WIN32】怎么绘制无边框的圆和圆角矩形？

[大树学长]

在WIN32中绘制圆
HBRUSH hbrush = CreateSolidBrush(color);
SelectObject(Hdc, hbrush);
Ellipse(Hdc, x1, y1, x2, y2);
DeleteObject(hbrush);
绘制圆角矩形：
HBRUSH hbrush = CreateSolidBrush(color);
SelectObject(Hdc, hbrush);
RoundRect(Hdc, x1, y1, x2, y2, 5, 5);
DeleteObject(hbrush);
这样绘制有边线很丑
请问怎么去掉边线？？？？

[zgl7903]

选人一个空画笔即可

  HPEN hPen = CreatePen(PS_NULL, 1, 0);
  HGDIOBJ hPenOld = SelectObject(Hdc, hPen);

  {
    COLORREF color = RGB(255, 0, 0);
    int x1 = 10, y1 = 10, x2=110, y2=110;
    HBRUSH hbrush = CreateSolidBrush(color);
    HBRUSH hburshOld = (HBRUSH)SelectObject(Hdc, hbrush);
    Ellipse(Hdc, x1, y1, x2, y2);
    SelectObject(Hdc, hburshOld);
    DeleteObject(hbrush);
  }
  //绘制圆角矩形：
  {
    COLORREF color = RGB(0, 200, 0);
    int x1 = 120, y1 = 120, x2=210, y2=210;

    HBRUSH hbrush = CreateSolidBrush(color);
    HGDIOBJ hburshOld = SelectObject(Hdc, hbrush);
    RoundRect(Hdc, x1, y1, x2, y2, 5, 5);
    SelectObject(Hdc, hburshOld);
    DeleteObject(hbrush);
  }

  SelectObject(Hdc, hPenOld);
  DeleteObject(hPen);

[大树学长]

引用 1 楼 zgl7903 的回复:

选人一个空画笔即可

  HPEN hPen = CreatePen(PS_NULL, 1, 0);
  HGDIOBJ hPenOld = SelectObject(Hdc, hPen);

  {
    COLORREF color = RGB(255, 0, 0);
    int x1 = 10, y1 = 10, x2=110, y2=110;
    HBRUSH hbrush = CreateSolidBrush(color);
    HBRUSH hburshOld = (HBRUSH)SelectObject(Hdc, hbrush);
    Ellipse(Hdc, x1, y1, x2, y2);
    SelectObject(Hdc, hburshOld);
    DeleteObject(hbrush);
  }
  //绘制圆角矩形：
  {
    COLORREF color = RGB(0, 200, 0);
    int x1 = 120, y1 = 120, x2=210, y2=210;

    HBRUSH hbrush = CreateSolidBrush(color);
    HGDIOBJ hburshOld = SelectObject(Hdc, hbrush);
    RoundRect(Hdc, x1, y1, x2, y2, 5, 5);
    SelectObject(Hdc, hburshOld);
    DeleteObject(hbrush);
  }

  SelectObject(Hdc, hPenOld);
  DeleteObject(hPen);

666666
确实去掉边线了 不过有锯齿

[赵4老师]

SetStretchBltMode STRETCH_HALFTONE

[赵4老师]

或者干脆上GDI+

[zgl7903]

要么试试把画笔和画刷的颜色设置的一样看看看， CreatePen(PS_SOLID, 1, 颜色)
要再有锯齿，那就可能要GDI+等抗锯齿处理了

[大树学长]

引用 3 楼 zhao4zhong1 的回复:

SetStretchBltMode STRETCH_HALFTONE

引用 4 楼 zhao4zhong1 的回复:

或者干脆上GDI+

引用 5 楼 zgl7903 的回复:

要么试试把画笔和画刷的颜色设置的一样看看看， CreatePen(PS_SOLID, 1, 颜色)
要再有锯齿，那就可能要GDI+等抗锯齿处理了

SetStretchBltMode STRETCH_HALFTONE这个方法好，不过没有试过不知道行不行，GDI+可以解决问题，不过我换成插入图片了，还是不用代码画了

[大树学长]

上面两种方法都试过了，不行
解决办法应该就两种：
1、使用GDI+然后加上抗锯齿
2、换成图片显示