First I use IIMAGE_SetParm(pImage * pIImage,IPARM_SCALE,int x,int y) to narrow the picture.
And then I use IIMAGE_Draw(pImage * pIImage, x , y) to draw the picture.
Sometimes,the picture can not be drawed successfully. If I dierct to draw the picture without narrowing it, it can be draw and display successfully.
I want to know Why I can not draw the picture after Narrowing a picture?
How can I solve this problem?

Thanks!