紧急求助878

用878如何实现将视频上下颠倒！


俺以前用信号发射器图像都是对称的没看出来，俺现在抓的数据图像是倒的！郁闷！查878资料没有查到！
请高手救命！东西要发布了！惨！

难道你的信号发生器只会出彩条？

there are two ways to handle it:

1: by driver
when you assign dma address, dma the first line to last line buffer, 2nd line to last 2nd buffer, ... last line to the 1st line buffer.

2: by application display function:
BOOL StretchBlt(
   int x,
   int y,//this point to the bottom position:nHeight
   int nWidth,
   int nHeight,//this use -nHeight
   CDC* pSrcDC,
   int xSrc,
   int ySrc,
   int nSrcWidth,
   int nSrcHeight,
   DWORD dwRop
);

(don\'t do both at the same time!)

there are two ways to handle it:

1: by driver
when you assign dma address, dma the first line to last line buffer, 2nd line to last 2nd buffer, ... last line to the 1st line buffer.

2: by application display function:
BOOL StretchBlt(
   int x,
   int y,//this point to the bottom position:nHeight
   int nWidth,
   int nHeight,//this use -nHeight
   CDC* pSrcDC,
   int xSrc,
   int ySrc,
   int nSrcWidth,
   int nSrcHeight,
   DWORD dwRop
);

(don\'t do both at the same time!)
 

恩，俺就用的第一种方法解决的！