internal void UpdateResources(Device device)
{
lock (FTextures)
{
var size = Size;
// Create new textures for valid sizes only
if (size.Width > 0 && size.Height > 0)
{
if (!FTextures.Any(t => t.Device == device))
{
var texture = new DoubleBufferedTexture(device, size);
FTextures.Add(texture);
// Trigger a redraw
FBrowserHost.Invalidate(CefPaintElementType.View);
}
}
// Tell all textures to update - in case the size is not valid
// the texture will stick to the old one
for (int i = 0; i < FTextures.Count; i++)
{
var texture = FTextures[i];
if (texture.Device == device)
{
var newTexture = texture.Update(size);
// If the "new" texture is in a degraded state trigger a redraw
if (newTexture != texture && newTexture.IsDegraded)
{
FBrowserHost.Invalidate(CefPaintElementType.View);
}
FTextures[i] = newTexture;
}
}
}
}
public DoubleBufferedTexture Update(Size newSize)
{
// Should the size be invalid stick with the old one
if (newSize.Width <= 0 || newSize.Height <= 0)
{
UpdateTexture();
return(this);
}
// Should the size change switch to the degraded state
if (newSize != Size)
{
IncompleteTexture.Dispose();
return(new DoubleBufferedTexture(Device, newSize, true, CreateTexture(Device, newSize, Pool.SystemMemory), LastCompleteTexture));
}
// Size is the same
if (IsDegraded)
{
// We're degraded (sizes of textures differ)
if (IsDirty)
{
// We can switch to the non-degraded state
LastCompleteTexture.Dispose();
var result = new DoubleBufferedTexture(Device, Size, false, IncompleteTexture, CreateTexture(Device, Size, Pool.Default));
// And since we already have a result upload the texture immediately
result.UpdateTexture();
return(result);
}
else
{
// Write hasn't been called yet - stay in the degraded state
return(this);
}
}
else
{
// Juhu, we're not degraded
UpdateTexture();
return(this);
}
}