public void DrawOverlay(Surface targetSurface)
{
Texture subTexture;
Subtitle currentSubtitle;
lock (_syncObj)
{
currentSubtitle = _currentSubtitle;
subTexture = _subTexture;
// Available sub is not due
if (currentSubtitle == null || !currentSubtitle.ShouldDraw)
return;
if (targetSurface == null || targetSurface.Disposed || subTexture == null)
{
if (_drawCount > 0)
ServiceRegistration.Get<ILogger>().Debug("Draw count for last sub: {0}", _drawCount);
_drawCount = 0;
return;
}
_drawCount++;
}
try
{
if (!subTexture.Disposed)
{
// TemporaryRenderTarget changes RenderTarget to texture and restores settings when done (Dispose)
using (new TemporaryRenderTarget(targetSurface))
using (TemporaryRenderState temporaryRenderState = new TemporaryRenderState())
using (Sprite sprite = new Sprite(_device))
{
sprite.Begin(SpriteFlags.AlphaBlend);
// No alpha test here, allow all values
temporaryRenderState.SetTemporaryRenderState(RenderState.AlphaTestEnable, 0);
// Use the SourceAlpha channel and InverseSourceAlpha for destination
temporaryRenderState.SetTemporaryRenderState(RenderState.BlendOperation, (int) BlendOperation.Add);
temporaryRenderState.SetTemporaryRenderState(RenderState.SourceBlend, (int) Blend.SourceAlpha);
temporaryRenderState.SetTemporaryRenderState(RenderState.DestinationBlend, (int) Blend.InverseSourceAlpha);
// Check the target texture dimensions and adjust scaling and translation
SurfaceDescription desc = targetSurface.Description;
Matrix transform = Matrix.Identity;
transform *= Matrix.Translation(currentSubtitle.HorizontalPosition, currentSubtitle.FirstScanLine, 0);
// Subtitle could be smaller for 16:9 anamorphic video (subtitle width: 720, video texture: 1024)
// then we need to scale the subtitle width also.
if (currentSubtitle.ScreenWidth != desc.Width)
transform *= Matrix.Scaling((float) desc.Width / currentSubtitle.ScreenWidth, 1, 1);
sprite.Transform = transform;
sprite.Draw(subTexture, Color.White);
sprite.End();
}
}
}
catch (Exception ex)
{
ServiceRegistration.Get<ILogger>().Debug("Error in DrawOverlay", ex);
}
if (_onTextureInvalidated != null)
_onTextureInvalidated();
}
public void DrawOverlay(Texture targetTexture)
{
Subtitle currentSubtitle;
lock (_syncObj)
{
currentSubtitle = _subtitles.ToList().FirstOrDefault(s => s.ShouldDraw);
if (currentSubtitle == null)
return;
if (targetTexture == null || targetTexture.IsDisposed || currentSubtitle.SubTexture == null || currentSubtitle.SubTexture.IsDisposed)
{
if (_drawCount > 0)
ServiceRegistration.Get<ILogger>().Debug("Draw count for last sub: {0}", _drawCount);
_drawCount = 0;
return;
}
_drawCount++;
}
try
{
// TemporaryRenderTarget changes RenderTarget to texture and restores settings when done (Dispose)
using (new TemporaryRenderTarget(targetTexture))
using (TemporaryRenderState temporaryRenderState = new TemporaryRenderState())
using (Sprite sprite = new Sprite(_device))
{
sprite.Begin(SpriteFlags.AlphaBlend);
// No alpha test here, allow all values
temporaryRenderState.SetTemporaryRenderState(RenderState.AlphaTestEnable, 0);
// Use the SourceAlpha channel and InverseSourceAlpha for destination
temporaryRenderState.SetTemporaryRenderState(RenderState.BlendOperation, (int)BlendOperation.Add);
temporaryRenderState.SetTemporaryRenderState(RenderState.SourceBlend, (int)Blend.SourceAlpha);
temporaryRenderState.SetTemporaryRenderState(RenderState.DestinationBlend, (int)Blend.InverseSourceAlpha);
// Check the target texture dimensions and adjust scaling and translation
SurfaceDescription desc = targetTexture.GetLevelDescription(0);
Matrix transform = Matrix.Identity;
// Position subtitle and scale it to match video frame size, if required
transform *= Matrix.Translation(currentSubtitle.HorizontalPosition, currentSubtitle.FirstScanLine, 0);
if (currentSubtitle.ScreenWidth != desc.Width || currentSubtitle.ScreenHeight != desc.Height)
{
var factorW = (float)desc.Width / currentSubtitle.ScreenWidth;
var factorH = (float)desc.Height / currentSubtitle.ScreenHeight;
transform *= Matrix.Scaling(factorW, factorH, 1);
}
sprite.Transform = transform;
sprite.Draw(currentSubtitle.SubTexture, SharpDX.Color.White);
sprite.End();
}
if (_onTextureInvalidated != null)
_onTextureInvalidated();
}
catch (Exception ex)
{
ServiceRegistration.Get<ILogger>().Debug("Error in DrawOverlay", ex);
}
}
