VC6.0图像处理4--镜像
2011-08-31 23:32 libing64 阅读(388) 评论(0) 编辑 收藏 举报源码下载:http://download.csdn.net/detail/renshengrumenglibing/3875522
//本节是关于镜像处理的函数,大家重点关注如何申请存储空间,并返回一个指向该空间的指针,以及如何利用指针实现数据的操作
void CBMPViewerDoc::OnMenuitem32786() //垂直镜像
{
// TODO: Add your command handler code here
int linewidth;
linewidth=(pbi->bmiHeader.biWidth*pbi->bmiHeader.biBitCount+31)/32*4;
//申请空间,并返回其指针赋给lpbit
HLOCAL hbit;
hbit = LocalAlloc(LHND, linewidth);
unsigned char *lpbit;
lpbit = (unsigned char*)LocalLock(hbit);
unsigned char *lpScr;
unsigned char * lpDest;
// TODO: Add your command handler code here
for(int i = 0 ; i< bi.biHeight/2 ; i++){
lpScr = (unsigned char*)lpBuf + linewidth*i;
lpDest = (unsigned char*)lpBuf+linewidth*(bi.biHeight- 1 - i);
//常用的函数memcpy,将制定大下的数据从地址2复制个地址1
memcpy(lpbit, lpDest, linewidth);
memcpy(lpDest, lpScr,linewidth);
memcpy(lpScr, lpbit,linewidth);
}
// Invalidata(TRUE);
UpdateAllViews(NULL,0,NULL);
}
void CBMPViewerDoc::OnMenuitem32787() //水平镜像
{
// TODO: Add your command handler code here
// TODO: Add your command handler code here
int linewidth;
linewidth=(pbi->bmiHeader.biWidth*pbi->bmiHeader.biBitCount+31)/32*4;
unsigned char * lpDest;
unsigned char temp;
// TODO: Add your command handler code here
for(int i = 0 ; i< bi.biHeight ; i++){
for(int j = 0 ; j< bi.biWidth/2 ; j++){
unsigned char *lpScr;
lpScr = (unsigned char *)lpBuf+linewidth*(bi.biHeight - i -1) + j;
lpDest = (unsigned char *)lpBuf+linewidth*(bi.biHeight - i) - j;
temp = *lpScr;
*lpScr = *lpDest;
*lpDest = temp;
}
}
UpdateAllViews(NULL,0,NULL);
}
//未完待续