s3c2440,3.5#横屏lcd，旋转显示。

  我使用的是2440的开发板，3.5寸横屏。 PB4.2正常是320x240显示，想通过改驱动变成240x320显示。一直没能成功。最近使用PB5.0，通过改驱动，可以是320x240显示，也可以是240x320。通过参考，想在PB4.2下也改成240x320显示，编译出现如错误，向各位前辈请教。

BUILD: Linking e:\wince420\platform\smdk2440\drivers\display\s3c2440lcd directory
Files: 0
e:\wince420\platform\smdk2440\drivers\display\s3c2440lcd\s3c2440disp.obj() : error LNK2019: unresolved external symbol "public: __cdecl GPESurfRotate::GPESurfRotate(int,int,void *,int,enum EGPEFormat)" (??0GPESurfRotate@@QAA@HHPAXHW4EGPEFormat@@@Z) referenced in function "public: __cdecl S3C2440DISP::S3C2440DISP(void)" (??0S3C2440DISP@@QAA@XZ)
e:\wince420\platform\smdk2440\drivers\display\s3c2440lcd\s3c2440disp.obj() : error LNK2019: unresolved external symbol "public: void __cdecl GPERotate::RotateRectl(struct _RECTL *)" (?RotateRectl@GPERotate@@QAAXPAU_RECTL@@@Z) referenced in function "public: void __cdecl S3C2440DISP::CursorOn(void)" (?CursorOn@S3C2440DISP@@QAAXXZ)
e:\wince420\platform\smdk2440\drivers\display\s3c2440lcd\s3c2440disp.obj() : error LNK2019: unresolved external symbol "public: long __cdecl GPERotate::EmulatedBltRotate(struct GPEBltParms *)" (?EmulatedBltRotate@GPERotate@@QAAJPAUGPEBltParms@@@Z) referenced in function "public: virtual long __cdecl S3C2440DISP::BltPrepare(struct GPEBltParms *)" (?BltPrepare@S3C2440DISP@@UAAJPAUGPEBltParms@@@Z)
e:\wince420\platform\smdk2440\drivers\display\s3c2440lcd\s3c2440disp.obj() : error LNK2019: unresolved external symbol "public: void __cdecl GPESurfRotate::SetRotation(int,int,int)" (?SetRotation@GPESurfRotate@@QAAXHHH@Z) referenced in function "public: long __cdecl S3C2440DISP::DynRotate(int)" (?DynRotate@S3C2440DISP@@QAAJH@Z)
e:\wince420\platform\smdk2440\target\armv4i\retail\s3c2440disp.dll() : error LNK1120: 4 unresolved externals



在文件E:\WINCE420\PLATFORM\SMDK2440\DRIVERS\DISPLAY\S3C2440LCD\s3c2440disp.h
有类定义：class S3C2440DISP : public GPERotate

可是找不到class GPERotate类定义在哪里？请各位前辈给予指点，万分感谢！maxim@163.com

Linkingr的错误找到了，是因为要在source文件里设置ROTATE=1我本来以为只为在头文件里设置#define ROTATE=1，就可以。现在可能正常编译连接了。可是屏幕并为旋转，请大家指教？