public MyScreenCanvas GetCanvasPage(int hPageNum, int vPageNum)
{
int j = cachePages.Count;
for (int i = j - 1; i > -1; i--)
{
MyScreenCanvas page = cachePages[i];
if (page.IsPageNumber(hPageNum, vPageNum))
{
cachePages.RemoveAt(i);
if (page.DimensionInvalid)
{
page.Reset(hPageNum, vPageNum, eachPageWidth, eachPageHeight);
page.IsUnused = false;
}
return(page);
}
}
if (j >= numOfCachePages)
{
MyScreenCanvas page = cachePages[0];
cachePages.RemoveAt(0);
page.IsUnused = false;
if (page.DimensionInvalid)
{
page.Reset(hPageNum, vPageNum, eachPageWidth, eachPageHeight);
}
else
{
page.Reuse(hPageNum, vPageNum);
}
Rectangle rect = page.Rect;
page.Invalidate(rect);
return(page);
}
else
{
return(new MyScreenCanvas(gfxPlatform,
hPageNum,
vPageNum,
hPageNum * eachPageWidth,
eachPageHeight * vPageNum,
eachPageWidth,
eachPageHeight));
}
}
public void CanvasInvalidate(Rectangle rect)
{
Rectangle r = rect;
if (pageA != null && pageA.IntersectsWith(r))
{
pageA.Invalidate(r);
}
if (pageB != null && pageB.IntersectsWith(r))
{
pageB.Invalidate(r);
}
if (pageC != null && pageC.IntersectsWith(r))
{
pageC.Invalidate(r);
}
if (pageD != null && pageD.IntersectsWith(r))
{
pageD.Invalidate(r);
}
}
