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TAcceleratedBitmapInfo.iPixelShift的文档变化和二进制不兼容的问题

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兼容于
平台: S60 3rd Edition, MR, S60 3rd Edition, FP1
S60 3rd Edition FP1
S60 3rd Edition (initial release)

文章
huwell 在 30 Nov 2007 创建
最后由 hamishwillee 在 30 May 2013 编辑
  • 详细描述

S60第三版MR和FP1 SDK中所记载的TAcceleratedBitmapInfo.iPixelShift内容并不正确,描述如下:


“The number of bits needed to represent one pixel in the bitmap”


有关TAcceleratedBitmapInfo.iPixelShift的正确定义应为:


“The shift required to obtain the number of bits needed to represent one pixel in the bitmap. The number of bits per pixel is calculated as 1 << iPixelShift”


一些S60第三版手机使用了文档错误定义下的组件。


TAcceleratedBitmapInfo.iPixelShift在错误的实现下会返回32,而正确的值将会是5.


错误返回值上实现的程序在某些S60手机上将无法正确工作。


至少下列机型是存在上述错误机制的(TAcceleratedBitmapInfo.iPixelShift返回32)

- Nokia 3250

- Nokia E60

- Nokia E70

- Nokia N80

- Nokia N75


但另外一些机型正确的纠正了上述问题(TAcceleratedBitmapInfo.iPixelShift返回5):

- Nokia N95


注意:不过如果手机更新了新的软件版本,上述问题可能有所改变,使用TAcceleratedBitmapInfo.iPixelShift的程序应将以上两种情况都考虑在内。

This page was last modified on 30 May 2013, at 07:36.
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