好吧问答库 > MFC 图片怎么实现放大缩小功能

MFC 图片怎么实现放大缩小功能

2025年04月08日 02:19
有1个网友回答
网友（1）：

BOOL StretchBlt(
HDC hdcDest, // handle to destination DC
int nXOriginDest, // x-coord of destination upper-left corner
int nYOriginDest, // y-coord of destination upper-left corner
int nWidthDest, // width of destination rectangle
int nHeightDest, // height of destination rectangle
HDC hdcSrc, // handle to source DC
int nXOriginSrc, // x-coord of source upper-left corner
int nYOriginSrc, // y-coord of source upper-left corner
int nWidthSrc, // width of source rectangle
int nHeightSrc, // height of source rectangle
DWORD dwRop // raster operation code
);
你用这个函数就是可以了，自己先创建一个BITMAP然后将你要放大的图片选到BITMAP中，这样你就是可以操作你的画布了，在将图片输出

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