/// <summary>
/// Create new drawing context.
/// </summary>
/// <param name="createInfo">Create info.</param>
/// <param name="disposables">Array of elements to dispose after drawing has finished.</param>
public DrawingContextImpl(CreateInfo createInfo, params IDisposable[] disposables)
{
_dpi = createInfo.Dpi;
_visualBrushRenderer = createInfo.VisualBrushRenderer;
_disposables = disposables;
_canTextUseLcdRendering = !createInfo.DisableTextLcdRendering;
_grContext = createInfo.GrContext;
_gpu = createInfo.Gpu;
if (_grContext != null)
{
Monitor.Enter(_grContext);
}
Surface = createInfo.Surface;
Canvas = createInfo.Canvas ?? createInfo.Surface?.Canvas;
_session = createInfo.CurrentSession;
if (Canvas == null)
{
throw new ArgumentException("Invalid create info - no Canvas provided", nameof(createInfo));
}
if (!_dpi.NearlyEquals(SkiaPlatform.DefaultDpi))
{
_postTransform =
Matrix.CreateScale(_dpi.X / SkiaPlatform.DefaultDpi.X, _dpi.Y / SkiaPlatform.DefaultDpi.Y);
}
Transform = Matrix.Identity;
}
public ISkiaSurface TryCreateSurface(PixelSize size, ISkiaGpuRenderSession session)
{
// Only windows platform needs our FBO trickery
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return(null);
}
// Blit feature requires glBlitFramebuffer
if (!_glContext.GlInterface.IsBlitFramebufferAvailable)
{
return(null);
}
size = new PixelSize(Math.Max(size.Width, 1), Math.Max(size.Height, 1));
if (_canCreateSurfaces == false)
{
return(null);
}
try
{
var surface = new FboSkiaSurface(_grContext, _glContext, size, session?.SurfaceOrigin ?? GRSurfaceOrigin.TopLeft);
_canCreateSurfaces = true;
return(surface);
}
catch (Exception)
{
Logger.TryGet(LogEventLevel.Error, "OpenGL")
?.Log(this, "Unable to create a Skia-compatible FBO manually");
_canCreateSurfaces ??= false;
return(null);
}
}
public ISkiaSurface TryCreateSurface(PixelSize size, ISkiaGpuRenderSession session)
{
return(null);
}
public ISkiaSurface TryCreateSurface(PixelSize size, ISkiaGpuRenderSession session)
{
return(new GenericSkiaSurface(size));
}
