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  1. Macintosh
  2. Sample Code Notes
  3. _____________________________________________________________________________
  4.                                                   Developer Technical Support
  5.  
  6. #16:    OffSample
  7.  
  8. Written by:    Mark Bennett
  9.  
  10. Versions:            1.00                        April 1989
  11.                     1.01                        June 1992
  12.  
  13. Components:            OffSample.p                    April 1, 1989
  14.                     OffSample.r                    April 1, 1989
  15.                     OffSample.h                    April 1, 1989
  16.                      OffSample.rsrc                April 1, 1989
  17.                     POffSample.make                April 1, 1989
  18.  
  19. Required:            Offscreen.p                    April 1, 1989
  20.                     Offscreen.incl.p            April 1, 1989
  21.                     UFailure.p                    November 1, 1988
  22.                     UFailure.incl.p                November 1, 1988
  23.                     UFailure.a                    November 1, 1988
  24. _____________________________________________________________________________
  25.  
  26. OffSample demonstrates the usage of the Offscreen unit.  It shows 
  27. how to use off-screen bitmaps and pixel maps to produce flicker-
  28. free updating with a minimum of code restructuring.  OffSample 
  29. attempts to reduce the amount of “knowledge” it has of the off-
  30. screen structure so as to minimize its dependence upon that unit.
  31.  
  32. OffSample emphasizes using the Offscreen unit; it is not intended 
  33. to be viewed as a complete application on which to base some 
  34. larger effort.  Instead, its method of using off-screen bitmaps 
  35. and pixel maps should be studied and adapted to other applications 
  36. that desire features like flicker-free updating.
  37.  
  38. Changes with version 1.01
  39. _________________________
  40.  
  41. Updated to work with MPW 3.2 header files by changing "chunky" to "chunkyPix"
  42. and removing extra type declarations.