{相关方法} TDirect2DCanvas.DrawEllipse(); TDirect2DCanvas.DrawLine(); TDirect2DCanvas.DrawRectangle(); TDirect2DCanvas.DrawRoundedRectangle(); TDirect2DCanvas.FillEllipse(); TDirect2DCanvas.FillRectangle(); TDirect2DCanvas.FillRoundedRectangle(); {相关结构} TD2DPoint2f (或 D2D_POINT_2F) //浮点点结构; 构建函数 D2D1PointF(); 可从 TPoint 隐式转换到 TD2DPoint2f TD2D1Ellipse (或 D2D1_ELLIPSE) //浮点椭圆结构; 构建函数 D2D1Ellipse(); TD2D1RectF (或 D2D1_RECT_F) //浮点矩形结构; 构建函数 D2D1RectF(); 可从 TRect 隐式转换到 TD2D1RectF TD2D1RoundedRect (或 D2D1_ROUNDED_RECT) //浮点圆角矩形结构; 构建函数 D2D1RoundedRect();
测试代码:
uses Direct2D, D2D1; procedure TForm1.FormPaint(Sender: TObject); var cvs: TDirect2DCanvas; fPt: TD2DPoint2f; fLeft,fTop: Single; begin fPt := D2D1PointF(ClientWidth / 2, ClientHeight / 2); fLeft := ClientWidth / 4; fTop := ClientHeight / 4; cvs := TDirect2DCanvas.Create(Canvas, ClientRect); cvs.BeginDraw; cvs.Pen.Color := clRed; cvs.Pen.Width := 2; cvs.Brush.Color := clBlack; cvs.FillRectangle(D2D1RectF(fLeft, fTop, fLeft*3, fTop*3)); cvs.Brush.Color := clGreen; cvs.FillRoundedRectangle(D2D1RoundedRect(D2D1RectF(fLeft, fTop, fLeft*3, fTop*3), 32, 32)); cvs.Brush.Color := clBlue; cvs.FillEllipse(D2D1Ellipse(fPt, fLeft, fTop)); cvs.DrawRectangle(D2D1RectF(fLeft, fTop, fLeft*3, fTop*3)); cvs.DrawRoundedRectangle(D2D1RoundedRect(D2D1RectF(fLeft, fTop, fLeft*3, fTop*3), 32, 32)); cvs.DrawEllipse(D2D1Ellipse(fPt, fLeft, fTop)); cvs.DrawLine(D2D1PointF(fLeft, fTop), D2D1PointF(fLeft*3, fTop*3)); cvs.EndDraw; cvs.Free; end; procedure TForm1.FormResize(Sender: TObject); begin Repaint; end;