/// <summary>
/// Sends the given ViewPort backward one step in the Z-order.
/// </summary>
/// <param name="vp">The ViewPort you want to send backward.</param>
/// <remarks>
/// If the given ViewPort is not registered or is the bottommost ViewPort of the Display then this function
/// has no effect.
/// Call this from the render thread.
/// </remarks>
private void SendViewPortBackward_i(ViewPort vp)
{
lock (this.viewPorts)
{
int vpIndex = this.viewPorts.IndexOf(vp);
if (vpIndex > 0)
{
/// Swap the given ViewPort and the ViewPort behind it.
ViewPortRefreshMgr vpr = this.vpRefreshers[vpIndex];
this.viewPorts[vpIndex] = this.viewPorts[vpIndex - 1];
this.viewPorts[vpIndex - 1] = vp;
this.vpRefreshers[vpIndex] = this.vpRefreshers[vpIndex - 1];
this.vpRefreshers[vpIndex - 1] = vpr;
}
}
}
/// <summary>
/// Brings the given ViewPort forward one step in the Z-order.
/// </summary>
/// <param name="vp">The ViewPort you want to bring forward.</param>
/// <remarks>
/// If the given ViewPort is not registered or is the topmost ViewPort of the Display then this function
/// has no effect.
/// Call this from the render thread.
/// </remarks>
private void BringViewPortForward_i(ViewPort vp)
{
lock (this.viewPorts)
{
int vpIndex = this.viewPorts.IndexOf(vp);
if (-1 != vpIndex && vpIndex < this.viewPorts.Count - 1)
{
/// Swap the given ViewPort and the ViewPort in front of it.
ViewPortRefreshMgr vpr = this.vpRefreshers[vpIndex];
this.viewPorts[vpIndex] = this.viewPorts[vpIndex + 1];
this.viewPorts[vpIndex + 1] = vp;
this.vpRefreshers[vpIndex] = this.vpRefreshers[vpIndex + 1];
this.vpRefreshers[vpIndex + 1] = vpr;
}
}
}
/// <summary>
/// Constructs a ViewPortRefreshMgr object.
/// </summary>
/// <param name="targetVP">The target ViewPort that this refresh manager is responsible for.</param>
public ViewPortRefreshMgr(ViewPort targetVP, BitmapAccess frameBufferAccess)
{
if (null == targetVP)
{
throw new ArgumentNullException("targetVP");
}
if (null == frameBufferAccess)
{
throw new ArgumentNullException("frameBufferAccess");
}
this.targetVP = targetVP;
this.frameBufferAccess = frameBufferAccess;
this.drawAccessGranted = false;
this.dirtyRectsVPC = new List <Rectangle>();
this.dirtyRectsDC = new List <Rectangle>();
this.invalidate = true;
}
/// <summary>
/// Sends the given ViewPort to the bottom of the Z-order.
/// </summary>
/// <param name="vp">The ViewPort you want to send to the bottom.</param>
/// <remarks>
/// If the given ViewPort is not registered or is the bottommost ViewPort of the Display then this function
/// has no effect.
/// Call this from the render thread.
/// </remarks>
private void SendViewPortBottom_i(ViewPort vp)
{
lock (this.viewPorts)
{
int vpIndex = this.viewPorts.IndexOf(vp);
if (vpIndex > 0)
{
ViewPortRefreshMgr vpr = this.vpRefreshers[vpIndex];
for (int i = vpIndex; i > 0; i--)
{
this.viewPorts[i] = this.viewPorts[i - 1];
this.vpRefreshers[i] = this.vpRefreshers[i - 1];
}
this.viewPorts[0] = vp;
this.vpRefreshers[0] = vpr;
}
}
}
/// <summary>
/// Brings the given ViewPort to the top of the Z-order.
/// </summary>
/// <param name="vp">The ViewPort you want to bring to the top.</param>
/// <remarks>
/// If the given ViewPort is not registered or is the topmost ViewPort of the Display then this function
/// has no effect.
/// Call this from the render thread.
/// </remarks>
private void BringViewPortTop_i(ViewPort vp)
{
lock (this.viewPorts)
{
int vpIndex = this.viewPorts.IndexOf(vp);
if (-1 != vpIndex && vpIndex < this.viewPorts.Count - 1)
{
ViewPortRefreshMgr vpr = this.vpRefreshers[vpIndex];
for (int i = vpIndex; i < this.viewPorts.Count - 1; i++)
{
this.viewPorts[i] = this.viewPorts[i + 1];
this.vpRefreshers[i] = this.vpRefreshers[i + 1];
}
this.viewPorts[this.viewPorts.Count - 1] = vp;
this.vpRefreshers[this.vpRefreshers.Count - 1] = vpr;
}
}
}
/// <summary>
/// This function applies the current Z-order on the ViewPorts. This means that all refresh manager
/// will be notified if any parts of it's corresponding ViewPort is covered by another ViewPort.
/// </summary>
private void ApplyZOrderOnViewPorts()
{
for (int currIdx = 0; currIdx < this.viewPorts.Count - 1; currIdx++)
{
ViewPort currVP = this.viewPorts[currIdx];
ViewPortRefreshMgr currVPR = this.vpRefreshers[currIdx];
for (int otherIdx = currIdx + 1; otherIdx < this.viewPorts.Count; otherIdx++)
{
ViewPort otherVP = this.viewPorts[otherIdx];
ViewPortRefreshMgr otherVPR = this.vpRefreshers[otherIdx];
Rectangle intersection = Rectangle.Intersect(currVP.Position, otherVP.Position);
if (!intersection.IsEmpty)
{
currVPR.AddHiddenArea(otherVPR, intersection);
}
}
}
}
