[PyQt] 回复： 回复： 回复： how to cast the returned pointer of QImage::scanLine(int i) toQRgb ? format is Format_RGB32

[iMath]

the test shows:
sip.voidptr object has an unknown size




------------------ 原始邮件 ------------------
发件人: "phil";<phil at riverbankcomputing.com>;
发送时间: 2014年1月11日(星期六) 下午5:30
收件人: "iMath"<2281570025 at qq.com>; 
抄送: "pyqt"<pyqt at riverbankcomputing.com>; 
主题: Re: 回复： 回复： how to cast the returned pointer of QImage::scanLine(int i) toQRgb ? format is Format_RGB32



On 11-01-2014 2:42 am, iMath wrote:
> but you mentioned here
> http://pyqt.sourceforge.net/Docs/PyQt4/gotchas.html#support-for-void
> [1]
>
>  A sip.voidptr may also be given a size (ie. the size of the block of
> memory that is pointed to) by calling its setsize() method. If it has
> a size then it is also able to support Python’s buffer protocol and
> behaves like a Python memoryview object
>
> Is this mean A sip.voidptr doesn't have a size by default ? if it is
> ,then sip.voidptr couldn't support Python’s buffer protocol,right ?

It will support a size if it is available. I will look at this 
particular case to see if the size can be determined.

Phil
.
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