protected void Dispose(bool disposing)
{
if (disposing)
{
if (CachedElementCanvas != null)
{
CachedElementCanvas.Dispose();
CachedElementCanvas = null;
}
}
}
public Bitmap Draw(Size imageSize, bool useCachedImage)
{
if ((CachedElementCanvas == null || !IsCanvasContentCurrent(imageSize) || CachedElementCanvas.Width != imageSize.Width || CachedElementCanvas.Height != imageSize.Height))
{
if (CachedElementCanvas != null)
{
CachedElementCanvas.Dispose();
}
CachedElementCanvas = SetupCanvas(imageSize);
if (!useCachedImage || m_redraw)
{
using (Graphics g = Graphics.FromImage(CachedElementCanvas))
{
DrawCanvasContent(g);
AddSelectionOverlayToCanvas(g);
m_rendered = true;
}
CachedCanvasIsCurrent = true;
m_redraw = false;
}
else
{
using (Graphics g = Graphics.FromImage(CachedElementCanvas))
{
AddSelectionOverlayToCanvas(g);
}
}
}
else
{
if (!useCachedImage && !m_rendered)
{
if (CachedElementCanvas != null)
{
CachedElementCanvas.Dispose();
}
CachedElementCanvas = SetupCanvas(imageSize);
using (Graphics g = Graphics.FromImage(CachedElementCanvas))
{
DrawCanvasContent(g);
AddSelectionOverlayToCanvas(g);
m_rendered = true;
}
}
}
return(CachedElementCanvas);
}
public Bitmap SetupCachedImage(Size imageSize)
{
CachedCanvasIsCurrent = false;
EffectNode.Effect.Render(); //ensure the effect is rendered outside of the locking.
lock (drawLock) {
Bitmap bitmap = new Bitmap(imageSize.Width, imageSize.Height);
using (Graphics g = Graphics.FromImage(bitmap)){
DrawCanvasContent(g);
AddSelectionOverlayToCanvas(g, false);
if (CachedElementCanvas != null)
{
CachedElementCanvas.Dispose();
}
CachedElementCanvas = bitmap;
Changed = false;
CachedCanvasIsCurrent = true;
}
}
return(CachedElementCanvas);
}