/// <summary>
/// Renders only the portions of the document that have changed (been Invalidated) since
/// the last call to this function.
/// </summary>
/// <param name="args">Contains information used to control where rendering occurs.</param>
/// <returns>true if any rendering was done (the update list was non-empty), false otherwise</returns>
public bool Update(RenderArgs dst)
{
if (disposed)
{
throw new ObjectDisposedException("Document");
}
Rectangle[] updateRects;
int updateRectsLength;
updateRegion.GetArrayReadOnly(out updateRects, out updateRectsLength);
if (updateRectsLength == 0)
{
return(false);
}
PdnRegion region = Utility.RectanglesToRegion(updateRects, 0, updateRectsLength);
Rectangle[] rectsOriginal = region.GetRegionScansReadOnlyInt();
Rectangle[] rectsToUse;
// Special case where we're drawing 1 big rectangle: split it up!
// This case happens quite frequently, but we don't want to spend a lot of
// time analyzing any other case that is more complicated.
if (rectsOriginal.Length == 1 && rectsOriginal[0].Height > 1)
{
Rectangle[] rectsNew = new Rectangle[Processor.LogicalCpuCount];
Utility.SplitRectangle(rectsOriginal[0], rectsNew);
rectsToUse = rectsNew;
}
else
{
rectsToUse = rectsOriginal;
}
int cpuCount = Processor.LogicalCpuCount;
for (int i = 0; i < cpuCount; ++i)
{
int start = (i * rectsToUse.Length) / cpuCount;
int end = ((i + 1) * rectsToUse.Length) / cpuCount;
UpdateScansContext usc = new UpdateScansContext(this, dst, rectsToUse, start, end - start);
if (i == cpuCount - 1)
{
// Reuse this thread for the last job -- no sense creating a new thread.
usc.UpdateScans(usc);
}
else
{
threadPool.QueueUserWorkItem(new WaitCallback(usc.UpdateScans), usc);
}
}
this.threadPool.Drain();
Validate();
return(true);
}
/// <summary>
/// Renders only the portions of the document that have changed (been Invalidated) since
/// the last call to this function.
/// </summary>
/// <param name="args">Contains information used to control where rendering occurs.</param>
/// <returns>true if any rendering was done (the update list was non-empty), false otherwise</returns>
public bool Update(RenderArgs dst)
{
if (disposed)
{
throw new ObjectDisposedException("Document");
}
Rectangle[] updateRects;
int updateRectsLength;
updateRegion.GetArrayReadOnly(out updateRects, out updateRectsLength);
if (updateRectsLength == 0)
{
return false;
}
PdnRegion region = Utility.RectanglesToRegion(updateRects, 0, updateRectsLength);
Rectangle[] rectsOriginal = region.GetRegionScansReadOnlyInt();
Rectangle[] rectsToUse;
// Special case where we're drawing 1 big rectangle: split it up!
// This case happens quite frequently, but we don't want to spend a lot of
// time analyzing any other case that is more complicated.
if (rectsOriginal.Length == 1 && rectsOriginal[0].Height > 1)
{
Rectangle[] rectsNew = new Rectangle[Processor.LogicalCpuCount];
Utility.SplitRectangle(rectsOriginal[0], rectsNew);
rectsToUse = rectsNew;
}
else
{
rectsToUse = rectsOriginal;
}
int cpuCount = Processor.LogicalCpuCount;
for (int i = 0; i < cpuCount; ++i)
{
int start = (i * rectsToUse.Length) / cpuCount;
int end = ((i + 1) * rectsToUse.Length) / cpuCount;
UpdateScansContext usc = new UpdateScansContext(this, dst, rectsToUse, start, end - start);
if (i == cpuCount - 1)
{
// Reuse this thread for the last job -- no sense creating a new thread.
usc.UpdateScans(usc);
}
else
{
threadPool.QueueUserWorkItem(new WaitCallback(usc.UpdateScans), usc);
}
}
this.threadPool.Drain();
Validate();
return true;
}
