private void OnRenderFrame()

in source/SkiaSharp.Views/SkiaSharp.Views.Blazor/SKGLView.razor.cs [92:153]
41 lines of code
12 McCabe index (conditional complexity)

		private void OnRenderFrame()
		{
			if (canvasSize.Width <= 0 || canvasSize.Height <= 0 || dpi <= 0 || jsGLInfo == null)
				return;

			// create the SkiaSharp context
			if (context == null)
			{
				glInterface = GRGlInterface.Create();
				context = GRContext.CreateGl(glInterface);

				// bump the default resource cache limit
				context.SetResourceCacheLimit(ResourceCacheBytes);
			}

			// get the new surface size
			var newSize = CreateSize(out var unscaledSize);
			var info = new SKImageInfo(newSize.Width, newSize.Height, colorType);
			var userVisibleSize = IgnorePixelScaling ? unscaledSize : info.Size;

			// manage the drawing surface
			if (renderTarget == null || renderTargetSize != newSize || !renderTarget.IsValid)
			{
				// create or update the dimensions
				renderTargetSize = newSize;

				var glInfo = new GRGlFramebufferInfo(jsGLInfo.FboId, colorType.ToGlSizedFormat());

				// destroy the old surface
				surface?.Dispose();
				surface = null;
				canvas = null;

				// re-create the render target
				renderTarget?.Dispose();
				renderTarget = new GRBackendRenderTarget(newSize.Width, newSize.Height, jsGLInfo.Samples, jsGLInfo.Stencils, glInfo);
			}

			// create the surface
			if (surface == null)
			{
				surface = SKSurface.Create(context, renderTarget, surfaceOrigin, colorType);
				canvas = surface.Canvas;
			}

			using (new SKAutoCanvasRestore(canvas, true))
			{
				if (IgnorePixelScaling)
				{
					var canvas = surface.Canvas;
					canvas.Scale((float)dpi);
					canvas.Save();
				}

				// start drawing
				OnPaintSurface?.Invoke(new SKPaintGLSurfaceEventArgs(surface, renderTarget, surfaceOrigin, info.WithSize(userVisibleSize), info));
			}

			// update the control
			canvas?.Flush();
			context.Flush();
		}