internal void PushScale(float scaleX, float scaleY)
{
var matrix = new MatrixF();
matrix.Scale(scaleX, scaleY);
_Push(matrix);
}
private void _OnRenderSizeChanged(float width, float height)
{
MakeSureCurrentContext(_context);
_worldToNDC = new MatrixF();
_worldToNDC.Translate(_origin.X, _origin.Y);
_worldToNDC.Scale(2 / width, 2 / height);
_worldToNDC.Translate(-1, -1);
_viewWidth = (int)(width * _transformToDevice.M11);
_viewHeight = (int)(height * _transformToDevice.M22);
Viewport(0, 0, _viewWidth, _viewHeight);
// for dashed line
_lineshader.Use();
_lineshader.SetVec2("screenSize", 1, new float[] { width, height });
// for dashed cicle and arc
_arcshader.Use();
_arcshader.SetVec2("screenSize", 1, new float[] { width, height });
}