关于动画如何消除闪烁和边缘的抖动!?
从前做的动画有闪烁的现象,用SDK做的,现在闪烁可以被消除,但是出现了边缘的抖动,不知道该如何消除抖动?
消除闪烁的代码如下:
void CMyView::OnDraw(CDC *pDC)
{
CDC dc;
CDC* pDrawDC = pDC;
CBitmap bitmap;
CBitmap* pOldBitmap = 0;
// only paint the rect that needs repainting
CRect client;
pDC->GetClipBox(client);
CRect rect = client;
//屏幕上显示
if (!pDC->IsPrinting())
{
// draw to offscreen bitmap for fast looking repaints
if (dc.CreateCompatibleDC(pDC))
{
if (bitmap.CreateCompatibleBitmap(pDC, rect.Width(), rect.Height()))
{
OnPrepareDC(&dc, NULL);
pDrawDC = &dc;
// offset origin more because bitmap is just piece of the whole drawing
dc.OffsetViewportOrg(-rect.left, -rect.top);
pOldBitmap = dc.SelectObject(&bitmap);
dc.SetBrushOrg(rect.left % 8, rect.top % 8);
// might as well clip to the same rectangle
dc.IntersectClipRect(client);
}
}
}
// paint background
CBrush brush;
if(!brush.CreateSolidBrush(RGB(255,255,255)))
return;
brush.UnrealizeObject();
pDrawDC->FillRect(client, &brush);
//此处绘制我要绘制的内容
if (pDrawDC != pDC)
{
pDC->SetViewportOrg(0, 0);
pDC->SetWindowOrg(0,0);
pDC->SetMapMode(MM_TEXT);
dc.SetViewportOrg(0, 0);
dc.SetWindowOrg(0,0);
dc.SetMapMode(MM_TEXT);
pDC->BitBlt(rect.left, rect.top, rect.Width(), rect.Height(),
&dc, 0, 0, SRCCOPY);
dc.SelectObject(pOldBitmap);
}
}