/// <summary>
/// Create Skia surface backed by given framebuffer.
/// </summary>
/// <param name="desiredImageInfo">Desired image info.</param>
/// <param name="framebuffer">Backing framebuffer.</param>
private void CreateSurface(SKImageInfo desiredImageInfo, ILockedFramebuffer framebuffer)
{
if (_framebufferSurface != null && AreImageInfosCompatible(_currentImageInfo, desiredImageInfo) && _currentFramebufferAddress == framebuffer.Address)
{
return;
}
FreeSurface();
_currentFramebufferAddress = framebuffer.Address;
var surface = SKSurface.Create(desiredImageInfo, _currentFramebufferAddress, framebuffer.RowBytes);
// If surface cannot be created - try to create a compatibility shim first
if (surface == null)
{
_conversionShim = new PixelFormatConversionShim(desiredImageInfo, framebuffer.Address);
_preFramebufferCopyHandler = _conversionShim.SurfaceCopyHandler;
surface = _conversionShim.Surface;
}
_framebufferSurface = surface ?? throw new Exception("Unable to create a surface for pixel format " +
framebuffer.Format +
" or pixel format translator");
_currentImageInfo = desiredImageInfo;
}
/// <summary>
/// Free Skia surface.
/// </summary>
private void FreeSurface()
{
_conversionShim?.Dispose();
_conversionShim = null;
_preFramebufferCopyHandler = null;
_framebufferSurface?.Dispose();
_framebufferSurface = null;
_currentFramebufferAddress = IntPtr.Zero;
}