IMPLEMNT.TEX
Package: Cimage.zip [view]
Upload User: wep9318
Upload Date: 2007-01-07
Package Size: 893k
Code Size: 1k
Category:
Picture Viewer
Development Platform:
Visual C++
- chapter{Implementation notes}label{implement}
- setheader{{it CHAPTER thechapter}}{}{}{}{}{{it CHAPTER thechapter}}%
- setfooter{thepage}{}{}{}{}{thepage}%
- The CImage library is derived from the wxImage code collated and
- developed by Alejandro Aguilar-Sierra.
- The original code had wxImage derived from the same base class
- as used by other implementation classes such as ImaGIF. To read a file,
- a temporary ImaGIF (or other) object was created, and then the data was
- copied into the wxImage object, and the temporary object deleted.
- I have rearranged things a bit so that CImage is derived from CObject,
- and contains a pointer to an implementation object derived CImageImpl.
- File I/O and other functionality is routed from CImage to the CImageImpl-derived
- object. When the CImage is saved as a different format, the implementation
- object is changed (requiring copying of some members).
- I have also eliminated dependencies on wxWindows, made use of CString
- instead of character pointers, corrected some memory leaks, replaced the
- DIB-writing code since the wxImage implementation appeared not to work,
- converted the demo app to MFC, and written the on-line help (which could
- do with expansion).