Hi all
Anybody gone through the sample Signature++-1 which converts a signature into a bitmap
and then stores it in a database?Kindly help. The sample creates an offscreen window
to copy the bits bound by the gadget and then copies the gadget's screen rectangle
into the new window. It then allocates the bitmap and sets all the important bits of
information.
The sample is using some member variables of Window Type structure which are not
probably supported. like:
WinHandle theWindowHandle;
theBitmapPtr->height = theWindowHandle->gDeviceP->height;
theBitmapPtr->rowBytes = theWindowHandle->gDeviceP->rowBytes;
etc.
theWindowHandle is of type WinHandle. The document describes WinHandle as: typedef
WindowType * WinHandle;
and WindowType structure nowhere has member like gDeviceP.
The compiler barfs at gDeviceP saying unidentified identifier( obviously)
I have replaced the gDeviceP with bitmapP , but have run into memory problems where
the program tries to move the offscreen bits into the bitmap.
// Move the offscreen bits into our bitmap. The baseAddr field
// contains the bit array of our bitmap for 1-bit, uncompressed //bitmaps.
MemMove( (MemPtr)((UInt32)(theBitmapPtr) + sizeof(BitmapType)),
theWindowHandle->gDeviceP->baseAddr, theRowBytes * theHeight );
// I have replaced theWindowHandle->gDeviceP->baseAddr with theWindowHandle->bitmapP
but the error says that Application has just read directly from memory location which
is in an unallocated chunk of memory
How do I get the Base address of the bitmap ( or bit array of the bitmap)
PS : I am using ver PalmOS 3.2
thanks a lot
Vijay
____________________________________________________
Buy Feng Shui Package for Rs. 151/- only, at
http://shopping.rediff.com/shopping/fengshui_mailer.htm
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/tech/support/forums/
