public static PixelRect FromRectWithDpi(Rect rect, Vector dpi) => new PixelRect(
PixelPoint.FromPointWithDpi(rect.Position, dpi),
PixelSize.FromSizeWithDpi(rect.Size, dpi));
public ISkiaGpuRenderSession BeginRenderingSession()
{
var session = _surface.BeginDraw(_vulkanPlatformSurface.Scaling);
bool success = false;
try
{
var disp = session.Display;
var api = session.Api;
var size = session.Size;
var scaling = session.Scaling;
if (size.Width <= 0 || size.Height <= 0 || scaling < 0)
{
size = new Avalonia.PixelSize(1, 1);
scaling = 1;
}
lock (GrContext)
{
GrContext.ResetContext();
var image = _surface.GetImage();
var imageInfo = new GRVkImageInfo()
{
CurrentQueueFamily = disp.QueueFamilyIndex,
Format = (uint)image.Format,
Image = image.Handle,
ImageLayout = (uint)image.CurrentLayout,
ImageTiling = (uint)image.Tiling,
ImageUsageFlags = _surface.UsageFlags,
LevelCount = _surface.MipLevels,
SampleCount = 1,
Protected = false,
Alloc = new GRVkAlloc()
{
Memory = image.MemoryHandle,
Flags = 0,
Offset = 0,
Size = _surface.MemorySize
}
};
var renderTarget =
new GRBackendRenderTarget((int)size.Width, (int)size.Height, 1,
imageInfo);
var surface = SKSurface.Create(GrContext, renderTarget,
GRSurfaceOrigin.TopLeft,
_surface.IsRgba ? SKColorType.Rgba8888 : SKColorType.Bgra8888, SKColorSpace.CreateSrgb());
if (surface == null)
{
throw new InvalidOperationException(
"Surface can't be created with the provided render target");
}
success = true;
return(new VulkanGpuSession(GrContext, renderTarget, surface, session));
}
}
finally
{
if (!success)
{
session.Dispose();
}
}
}
public static PixelRect FromRect(Rect rect, Vector scale) => new PixelRect(
PixelPoint.FromPoint(rect.Position, scale),
PixelSize.FromSize(rect.Size, scale));