private void OnMainImageBoundsChanged(Rect bounds)
{
//Console.WriteLine("mainImagePanel bounds -> {0}", bounds);
if (bounds.IsEmpty)
{
return;
}
//Debug.WriteLine("OnMainImageBoundsChanged begin");
// Update drawer & invalidate
_viewport.SetImageSize((float)bounds.Width, (float)bounds.Height);
UpdateDrawerBounds();
InvalidateView(false);
// We have invalidated our image
// but we should resize avalonia bitmap (for image control) immediately
// because avalonia may redraw scene at any time
var pixelSize = new PixelSize((int)bounds.Width, (int)bounds.Height);
BitmapAdapter.EnsureBitmapSize(ref _mainBitmap.AvaloniaBitmap, pixelSize);
_mainImageControl.Source = _mainBitmap.AvaloniaBitmap; // set new bitmap to image control
// We also fill new bitmap from last rendered bitmap to avoid "white resize"
UpdateMainBitmap();
//Debug.WriteLine("OnMainImageBoundsChanged end");
}
private void RenderThread()
{
while (true)
{
_eventRenderDoWork.WaitOne();
//Debug.WriteLine("Render DoWork got");
// get image and bitmap to render
TD.Image image; // source vector image
int bitmapIndex = -1; // destination raster bitmap index
lock (_renderLock) {
if (_closingWindow)
{
return;
}
image = _mainImage;
// choose system bitmap to render
for (int i = 0; i < 3; ++i)
{
if (i != _copyingBitmap && i != _lastRenderedBitmap)
{
bitmapIndex = i;
break;
}
}
}
//Debug.WriteLine("Rendering to {0} begin", bitmapIndex);
// prepare valid size bitmap
TD.Point imageSize = image.GetSize();
SD.Size bitmapSize = new SD.Size((int)imageSize.X, (int)imageSize.Y);
BitmapAdapter.EnsureBitmapSize(
ref _mainBitmap.SystemBitmaps[bitmapIndex],
bitmapSize
);
// render image to bitmap
/* !!! slow stuff
*
* Render raster image : 9071899 ticks / count 29 = 312824 // smooth
* Render raster image : 12153400 ticks / count 44 = 276213 // TextRenderingHint.SingleBitPerPixel
* Render raster image : 6779342 ticks / count 35 = 193695 // no text
* Render raster image : 8301237 ticks / count 42 = 197648 // no smooth
* Render raster image : 8025534 ticks / count 48 = 167198 // TextRenderingHint.SingleBitPerPixel
* Render raster image : 7030453 ticks / count 38 = 185011 // raster font MS serif
* Render raster image : 5674569 ticks / count 71 = 79923 // no text
* Render raster image : 10144730 ticks / count 30 = 338157 // always Arial 30
* Render raster image : 12752666 ticks / count 39 = 326991 // always Arial 30 - created once
*
* // read this: https://stackoverflow.com/questions/71374/fastest-api-for-rendering-text-in-windows-forms
* // GDI vs. GDI+ Text Rendering Performance https://techcommunity.microsoft.com/t5/windows-blog-archive/gdi-vs-gdi-text-rendering-performance/ba-p/228431
*
*/
#if USE_PERF
_perfRenderImage.Start();
#endif
using (var graphics = SD.Graphics.FromImage(
_mainBitmap.SystemBitmaps[bitmapIndex]
)) {
if (_systemSettings.drawerDisableAntialiasing)
{
graphics.SmoothingMode = SD.Drawing2D.SmoothingMode.None;
graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;
}
else
{
graphics.SmoothingMode = SD.Drawing2D.SmoothingMode.AntiAlias; // rendering time *= 1.5
}
graphics.Clear(SD.Color.White); // smooting makes ugly edges is no background filled
image.Draw(graphics);
}
#if USE_PERF
_perfRenderImage.Stop();
#endif
//Debug.WriteLine("Rendering to {0} end", bitmapIndex);
// Let UI thread to continue
lock (_renderLock) {
_lastRenderedBitmap = bitmapIndex;
}
Avalonia.Threading.Dispatcher.UIThread.InvokeAsync(UpdateMainBitmap);
}
}
