/*private float beginScale = 1;
* private void resetScale()
* {
* matrix = SKMatrix.Identity;
* SKMatrix.PostConcat(ref matrix, SKMatrix.CreateScale(beginScale, beginScale, canvasView.CanvasSize.Width, canvasView.CanvasSize.Height));
* }*/
private void bitmapInit()
{
this.renderingMode = (RenderingMode)Preferences.Get("RenderingMode", 2);
if (renderingMode == RenderingMode.DoubleBuffering)
{
this.doubleBufferingBitmap = new SKBitmap((int)this.canvasView.CanvasSize.Width, (int)this.canvasView.CanvasSize.Height);
this.bitmapCanvas = new SKCanvas(doubleBufferingBitmap);
}
else if (renderingMode == RenderingMode.FullDoubleBuffering)
{
try
{
this.bitmap = new SKBitmap(LongUzorGraphic.GetResultContentWidth() > 7000? 7000 : LongUzorGraphic.GetResultContentWidth(),
LongUzorGraphic.GetResultContentHeight() > 13000? 13000: LongUzorGraphic.GetResultContentHeight());
}
catch (System.Exception e)
{
this.bitmap = new SKBitmap(3000, 4000);
var mb = new MessageBox(e.Message + " " + AppResource.SwitchRenderingAlert);
mb.OkButton_Clicked += hideAlert;
this.mainGrid.Children.Add(mb);
this.renderingMode = RenderingMode.Low;
}
this.bitmapCanvas = new SKCanvas(bitmap);
}
else
{
return;
}
this.updateBitmap();
}
private void onCanvasViewPaintSurface(object sender, SkiaSharp.Views.Forms.SKPaintSurfaceEventArgs e)
{
if (doubleBufferingBitmap == null && bitmap == null)
{
this.bitmapInit();
}
switch (renderingMode)
{
case RenderingMode.Low:
e.Surface.Canvas.SetMatrix(matrix);
LongUzorGraphic.Draw(e.Surface.Canvas, canvasView);
break;
case RenderingMode.DoubleBuffering:
e.Surface.Canvas.SetMatrix(bitmapMatrix);
e.Surface.Canvas.Clear();
e.Surface.Canvas.DrawBitmap(doubleBufferingBitmap, 0, 0);
break;
case RenderingMode.FullDoubleBuffering:
e.Surface.Canvas.SetMatrix(matrix);
e.Surface.Canvas.Clear(this.Data.BackColor.ToSKColor());
e.Surface.Canvas.DrawBitmap(bitmap, canvasView.CanvasSize.Width / 2 - bitmap.Width / 2, canvasView.CanvasSize.Height / 2 - bitmap.Height / 2);
break;
default:
break;
}
// TODO: draw zoom-indicator in top angle with specifical parent-view
}
private void updateBitmap()
{
if (renderingMode == RenderingMode.DoubleBuffering)
{
bitmapCanvas.SetMatrix(matrix);
LongUzorGraphic.Draw(bitmapCanvas, canvasView);
bitmapMatrix = SKMatrix.MakeIdentity();
}
else if (renderingMode == RenderingMode.FullDoubleBuffering)
{
bitmapCanvas.ResetMatrix();
LongUzorGraphic.Draw(bitmapCanvas, bitmap.Width, bitmap.Height);
}
}
