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2 Colour Image RLE compressed

Started by kevin, February 24, 2010, 06:21:34 AM

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kevin

February 24, 2010, 06:21:34 AM Last Edit: November 08, 2012, 02:11:22 PM by kevin
 2 Colour Image RLE compressed

 This is really a string thrashing exercise converted into a demo of sorts.  The demo simply displays an image that fades it in and out.  The Image is stored in STRING form though, which is decoded each frame.  The goal here was to thrash the guts out of the PB string engine.    Happily runs over a 100fps for the entire task.


 PB 1.64K/ PBFX V1.76 version (or above)

PlayBASIC Code: [Select]
 Packed$=""
 Packed$+="RRRRRRRRRRRS226lRS223uRS220FRS219JRS217MRS216PRS214VRS205aS8eS6ORS205aS8eS6PRS204cS8fS7QRS204aS8fS7TRS203aS9fS7URS205bS7fS7URS20"
 Packed$+="4aS8eS7URS204aS2aS6fS7VRS203aS3aS6eS7WRS205aS8dS6WRS204aS2aS7dS6WRS207aS6cS6XRS206bS7cS5-45:RS205aS2aS11-45:RS207bS11-45:RS206cS"
 Packed$+="11FS29qRS204aS3cS9-47:RS208eS6ES28dS5pRS207JS45aS2iRS208iS11nS15aS2aS18iRS207aS2gS8aS3aS2gS35fRS205aS2bS3cS4cS4aS26kS12aS2eRS206"
 Packed$+="cS4cS4cS28cS4qRS79aS126dS6bS3cS27bS3bS3pRS77eS128dS6aS4bS24cS4aS3pRS77fS129bS5bS4bS22cS4bS3cS4oRS76eS6bS123aS2aS4aS24aS2bS3aS3bS"
 Packed$+="3pRS75eS6cS152aS2bS3fS7bS3aS5hRS75iS157aS2aS3dS5aS10iRS74eS6eS136bS17aS2bS18gRS73lS143cS14aS2aS12bS3aS2aS4fRS72nS144dS23kS15eRS7"
 Packed$+="1pS146dS19bS3mS15dRS71fS7jS140dS17aS3nS17dRS70tS148cS15aS3pS19dRS69wS150cS8bS7aS2cS5lS14dRS69tS19cS131dS8aS9bS6kS13dRS65aS3AS151"
 Packed$+="dS7bS8dS9dS5eS8cRS67BS153dS6bS7aS2cS7kS14cRS63aS4CS153dS6bS6aS2aS2bS5kS16bRS61bS5DS154dS6cS6aS2bS3nS19dRS60bS5ES155dS6cS5aS2bS3p"
 Packed$+="S17aS4bRS59cS5GS157cS5cS6bS3eS6kS16cRS58cS5HS158cS5dS5aS2eS6lS14aS4bRS58bS4IS160cS5cS5bS3bS3hS9bS3aS2aS5bRS58aS3aS2HS159cS5cS5aS"
 Packed$+="2bS3aS2bS3cS4bS3aS3aS5bRS57bS4KS162bS4eS6bS3dS5cS4bS3aS3bS5cRS60jS11xS152cS5dS7cS4cS4cS4aS2cS7bRS61dS5bS3fS7aS2aS2cS4gS8bS131cS6"
 Packed$+="eS9cS4bS4aS2cS7bS3aS7aRS61bS4aS7aS11aS5fS136cS5fS7aS2aS3bS5dS8aS2cS8dRS61cS29dS134cS7gS8aS4gS12cS8bS3bRS60cS32bS132dS8pS21eS10bS"
 Packed$+="4aRS60cS33aS131dS10aS2jS16aS2dS8bS4bRS60cS33aS132cS13aS3aS10gS11aS3cRS58dS36aS131dS23aS2gS11bS4cRS56fS169dS22kS14aS4cRS56dS5aS16"
 Packed$+="4dS19mS18aS2cRS57eS169dS9aS4aS3bS3kS16aS3dRS58aS2bS30aS136eS11aS2aS2bS3mS17aS3cRS58dS168gS10aS3aS2aS2nS18aS3cRS57dS169hS12aS2bS3"
 Packed$+="mS18aS2cRS57dS113aS56jS11dS5oS19aS2cRS57cS4aS22fS86cS58HS33bS3bRS56eS10hS16hS86dS58HS36bRS58cS10fS15hS84fS10bS50GS33aRS59bS6aS2e"
 Packed$+="S6aS10fS7aS77gS10cS50GS32bRS58bS6aS4cS4bS11hS81kS14cS48HS33bRS58cS5aS2aS3fS15gS77aS3lS15cS49FS32aRS59aS6bS4fS13hS78aS2nS17bS48GS"
 Packed$+="32bRS58cS6cS5fS13gS76uS21bS47GS32bRS58bS6cS5fS12gS76vS23bS46GS32bRS58cS5aS2bS5gS9gS13bS61bS3wS24bS46GS32bRS58bS4aS2dS8lS19cS61DS"
 Packed$+="28bS46FS31cRS58cS5eS10hS9aS9bS59FS30bS45GS32cRS58bS6dS26cS9aS50GS31bS45GS32cRS58cS5fS24fS11aS50aS2FS31aS2aS41HS32cRS58cS5gS9bS3a"
 Packed$+="S10gS13bS51HS31cS43HS33cRS58cS5hS10dS5aS3lS17aS49IS34bS3aS38IS34aS2bRS58cS5iS11tS23bS50aS2HS31cS4aS37IS34bS3aRS59bS3lS13qS22aS49"
 Packed$+="aS2IS33bS3aS36KS35bS3bRS58cS5GS33bS51aS2HS31cS4aS35KS36bS3aRS58dS5FS34aS49aS3HS32bS4aS33LS37bS3aRS58dS5GS33aS52wS22aS3fS7cS4aS33"
 Packed$+="LS37bS3aS2aRS59cS4FS33aS53uS25dS6dS36MS38bS4aRS58dS5GS33aS52tS19aS10aS3cS35kS12aS2xS25aS3aRS59cS4FS32aS52bS3oS29eS35iS10aS6wS23b"
 Packed$+="S5aRS58JS37aS51bS4mS29dS6aS30eS6aS8wS24aS4aRS59JS35bS51cS5lS31cS35aS10bS3xS24aS4aRS60HS35aS50cS5kS20aS2aS2bS7cS42aS3FS30aRS60HS3"
 Packed$+="4aS51bS5cS5bS3aS11aS2aS2aS2bS6bS42aS4DS30aRS60gS8wS25aS52aS2aS4bS6aS9aS2aS2aS2aS2bS4aS2aS2bS41aS5CS27aS2aRS59hS12tS22aS52aS2aS4b"
 Packed$+="S14aS4aS2aS2dS6bS3bS41aS4CS29bRS59gS10vS23aS53aS6aS13aS3aS2aS2eS7fS50BS26aS3aRS57aS2fS9aS3qS76aS4aS12aS3aS2aS2fS8eS45aS4CS28bRS5"
 Packed$+="8gS12uS92aS6aS2aS9eS44aS5cS4dS5nS17aS2aRS58fS11aS2qS101aS2bS4eS49aS10nS18bRS59fS9aS2qS94bS5gS8gS52aS2bS3aS4lS16cRS59cS4aS6aS2qS7"
 Packed$+="7bS6aS5hS9fS10eS47aS2jS11lS16cRS67aS3qS77cS6aS5aS2mS15aS2gS47CS30bRS63aS2aS3tS19aS60cS7aS7jS13bS3fS10aS33GS33cS5aRS63dS6tS78cS6a"
 Packed$+="S11aS8dS5gS10aS33aS2aS2CS28dS6bRS63cS4aS2aS2pS76cS5aS2aS5aS12eS6fS9aS36aS8aS2qS20dS6bRS63aS2bS3aS2pS77cS7cS8aS6aS2fS7eS55pS19dS7"
 Packed$+="cRS64bS3aS2qS78dS7cS4aS8jS11eS9aS46pS20cS6cRS64eS6oS77cS7fS7aS3lS13eS8aS44aS2pS21cS5dRS60aS3xS73aS3aS2aS6cS6kS12kS12eS8aS37dS5vS"
 Packed$+="24dS7cRS60BS72aS3aS6aS6aS2bS4AS24eS7aS38BS29dS6dRS60aS2AS68aS4aS4aS2aS8bS5FS69bS3wS25aS2bS5dRS59fS11aS2kS59aS5aS11aS3aS3FS71wS25"
 Packed$+="aS2aS2bS4dRS58aS3aS14iS58aS2aS3aS11bS3GS73aS2tS21aS3cS6dRS57aS11aS2aS2aS2aS3eS6aS67bS3ES73tS24aS2bS4dRS64qS18aS68bS3ES72uS24aS2a"
 Packed$+="S2aS3eRS62wS89aS2ES71aS2qS24aS2bS4dRS61uS20aS69eS6AS69qS25aS2aS3eRS59aS2fS7gS8fS72gS9aS2vS65aS2pS25bS4eRS59eS8aS10dS70hS11aS2tS6"
 Packed$+="6oS24bS5dRS58cS18eS71hS12uS64bS3nS26aS2fRS76dS71gS10aS2uS65oS25aS5eRS75eS72gS11aS2qS69gS8bS13aS4dS5aRS62aS2aS2aS9eS73eS9aS2tS72c"
 Packed$+="S4cS18fRS59kS16dS74bS8aS2qS74dS20fRS60lS14eS81bS3aS2pS92fRS58nS16dS79xS99eS6aRS59mS14eS80gS8nS91dS5aRS58uS94AS99dS5bRS57vS96wS98"
 Packed$+="gRS56aS2tS94xS98hRS57aS2qS89bS4xS96iRS56aS2qS88aS2aS16jS85iRS56aS2bS3nS83aS11aS2aS2aS2bS3iS84hS9aRS57bS3nS89BS99fS7bRS59hS9dS80B"
 Packed$+="S99aS2dS5cRS58aS2fS7dS5aS74aS2aS2iS10lS88iRS58aS3cS4aS2bS4aS75aS7bS3aS3mS89dS5cRS59aS5aS2bS4aS5aS70aS13mS90iRS65bS4aS6aS79aS2oS9"
 Packed$+="3gRS64bS10aS77uS98fS7aRS73cS7aS70tS99cS4cRS72cS8cS70pS100eRS71dS8dS71oS100eRS69fS9eS69aS2mS101dS5aRS68fS10fS70aS2aS2gS18aS81dRS6"
 Packed$+="5aS2aS2fS8gS84bS8aS82cRS64aS5eS8gS83cS7aS2bS82cRS65aS3eS8gS8aS73eS9aS2cS84bRS63aS4aS2dS7iS79gS10aS2aS2bS83bRS65aS3aS2bS6iS78aS2e"
 Packed$+="S8aS2eS87aRS67aS8iS75aS2aS2gS11fS88aRS69aS5iS10aS65aS5aS2aS2bS6gRS68aS6kS74aS4aS5cS6aS2fRS73lS78aS4aS8hRS72lS82aS7jRS71nS79aS10j"
 Packed$+="RS71mS88lRS70nS87mRS69nS15aS72nRS68pS86pRS68pS87oRS69nS87mRS70mS87lRS70lS13aS75aS2iRS70mS89iRS71jS11aS78gRS71iS10aS80eS6aRS72jS8"
 Packed$+="9dS5aRS72iS90bS3aRS73gS90bRS73fS7aS84aRS73gRS74dS5aRS74eRS75cRS75bRS75bRS75aRRRRRRRR"
   

   StartTime=Timer()
      
   Angle#=180
         
   Do
      Cls 0

      ; Check how much time has past
      TimePast#=Timer()-StartTime

      ; calc the frames past since it started at a virtual 60fps
      FramesPast#=TimePast#/(1000/60.0)

      ; mult the frames past by the speed this object is fading
      Angle#=FramesPast#*0.5

      ; Use the angle as to control the brightness of the thing we're
      ; drawing.  In this case, depacking the RLE image from Strings :)        
      Level#=100+Cosradius(180+Angle#,100)      

      ;Decompress the string of RLE spans that mmake up this 2 colour image
      Decompress(Packed$,RgbFade($ffffff,Level#))

      ; draw the fps() 
      ink $ffffff
      print Fps()
      Sync
   loop
   



Function  Decompress(R$,ThisColour)

   // Build Chr codes$
   For lp =asc("a") to asc("x")
      ChrCODE$+=Chr$(lp)
   next
   ChrCODE$+=upper$(ChrCODE$)
   ChrCode$=replace$(ChrCode$,"RS","")

   // Replace the chr codes with the values 
   For lp=len(ChrCOde$) to 1 step -1
      tag$="-"+str$(lp)+":"
      R$=replace$(R$,mid$(chrcode$,lp),tag$,yes,false) 
   next


   // Decode RLE (Run Lenght)
   Lockbuffer
   For pos=1 to Len(R$)
      ThisChr=mid(r$,pos)

      ; Start of Row
      if ThisChr=asc("R")
         ; reset Pen
         Xpos=0
         Ypos++
         Continue
      endif

      ; Decode Span
      if ThisChr=asc("S")

         Pos2=Pos+1
         EndPos=INstring(R$,":",POs2)
         Span$=Mid$(R$,Pos2,Endpos-Pos2)                  
         
         MidPos=INstring(Span$,"-",1)
         
         XPos      =Xpos+val(CutRight$(Span$,MidPos))
         RunLength=(val(CutLeft$(Span$,MidPos)))

         Linec Xpos,Ypos,Xpos+RunLength,Ypos,ThisColour
                     
         pos=endPos
         Continue
      endif

   Next
   unlockbuffer

EndFunction







PB1.63 (learning Edition)
PlayBASIC Code: [Select]
 Packed$=Packed$+"RRRRRRRRRRRS226lRS223uRS220FRS219JRS217MRS216PRS214VRS205aS8eS6ORS205aS8eS6PRS204cS8fS7QRS204aS8fS7TRS203aS9fS7URS205bS7fS7URS20"
 Packed$=Packed$+"4aS8eS7URS204aS2aS6fS7VRS203aS3aS6eS7WRS205aS8dS6WRS204aS2aS7dS6WRS207aS6cS6XRS206bS7cS5-45:RS205aS2aS11-45:RS207bS11-45:RS206cS"
 Packed$=Packed$+"11FS29qRS204aS3cS9-47:RS208eS6ES28dS5pRS207JS45aS2iRS208iS11nS15aS2aS18iRS207aS2gS8aS3aS2gS35fRS205aS2bS3cS4cS4aS26kS12aS2eRS206"
 Packed$=Packed$+"cS4cS4cS28cS4qRS79aS126dS6bS3cS27bS3bS3pRS77eS128dS6aS4bS24cS4aS3pRS77fS129bS5bS4bS22cS4bS3cS4oRS76eS6bS123aS2aS4aS24aS2bS3aS3bS"
 Packed$=Packed$+"3pRS75eS6cS152aS2bS3fS7bS3aS5hRS75iS157aS2aS3dS5aS10iRS74eS6eS136bS17aS2bS18gRS73lS143cS14aS2aS12bS3aS2aS4fRS72nS144dS23kS15eRS7"
 Packed$=Packed$+"1pS146dS19bS3mS15dRS71fS7jS140dS17aS3nS17dRS70tS148cS15aS3pS19dRS69wS150cS8bS7aS2cS5lS14dRS69tS19cS131dS8aS9bS6kS13dRS65aS3AS151"
 Packed$=Packed$+"dS7bS8dS9dS5eS8cRS67BS153dS6bS7aS2cS7kS14cRS63aS4CS153dS6bS6aS2aS2bS5kS16bRS61bS5DS154dS6cS6aS2bS3nS19dRS60bS5ES155dS6cS5aS2bS3p"
 Packed$=Packed$+"S17aS4bRS59cS5GS157cS5cS6bS3eS6kS16cRS58cS5HS158cS5dS5aS2eS6lS14aS4bRS58bS4IS160cS5cS5bS3bS3hS9bS3aS2aS5bRS58aS3aS2HS159cS5cS5aS"
 Packed$=Packed$+"2bS3aS2bS3cS4bS3aS3aS5bRS57bS4KS162bS4eS6bS3dS5cS4bS3aS3bS5cRS60jS11xS152cS5dS7cS4cS4cS4aS2cS7bRS61dS5bS3fS7aS2aS2cS4gS8bS131cS6"
 Packed$=Packed$+"eS9cS4bS4aS2cS7bS3aS7aRS61bS4aS7aS11aS5fS136cS5fS7aS2aS3bS5dS8aS2cS8dRS61cS29dS134cS7gS8aS4gS12cS8bS3bRS60cS32bS132dS8pS21eS10bS"
 Packed$=Packed$+"4aRS60cS33aS131dS10aS2jS16aS2dS8bS4bRS60cS33aS132cS13aS3aS10gS11aS3cRS58dS36aS131dS23aS2gS11bS4cRS56fS169dS22kS14aS4cRS56dS5aS16"
 Packed$=Packed$+"4dS19mS18aS2cRS57eS169dS9aS4aS3bS3kS16aS3dRS58aS2bS30aS136eS11aS2aS2bS3mS17aS3cRS58dS168gS10aS3aS2aS2nS18aS3cRS57dS169hS12aS2bS3"
 Packed$=Packed$+"mS18aS2cRS57dS113aS56jS11dS5oS19aS2cRS57cS4aS22fS86cS58HS33bS3bRS56eS10hS16hS86dS58HS36bRS58cS10fS15hS84fS10bS50GS33aRS59bS6aS2e"
 Packed$=Packed$+"S6aS10fS7aS77gS10cS50GS32bRS58bS6aS4cS4bS11hS81kS14cS48HS33bRS58cS5aS2aS3fS15gS77aS3lS15cS49FS32aRS59aS6bS4fS13hS78aS2nS17bS48GS"
 Packed$=Packed$+"32bRS58cS6cS5fS13gS76uS21bS47GS32bRS58bS6cS5fS12gS76vS23bS46GS32bRS58cS5aS2bS5gS9gS13bS61bS3wS24bS46GS32bRS58bS4aS2dS8lS19cS61DS"
 Packed$=Packed$+"28bS46FS31cRS58cS5eS10hS9aS9bS59FS30bS45GS32cRS58bS6dS26cS9aS50GS31bS45GS32cRS58cS5fS24fS11aS50aS2FS31aS2aS41HS32cRS58cS5gS9bS3a"
 Packed$=Packed$+"S10gS13bS51HS31cS43HS33cRS58cS5hS10dS5aS3lS17aS49IS34bS3aS38IS34aS2bRS58cS5iS11tS23bS50aS2HS31cS4aS37IS34bS3aRS59bS3lS13qS22aS49"
 Packed$=Packed$+"aS2IS33bS3aS36KS35bS3bRS58cS5GS33bS51aS2HS31cS4aS35KS36bS3aRS58dS5FS34aS49aS3HS32bS4aS33LS37bS3aRS58dS5GS33aS52wS22aS3fS7cS4aS33"
 Packed$=Packed$+"LS37bS3aS2aRS59cS4FS33aS53uS25dS6dS36MS38bS4aRS58dS5GS33aS52tS19aS10aS3cS35kS12aS2xS25aS3aRS59cS4FS32aS52bS3oS29eS35iS10aS6wS23b"
 Packed$=Packed$+"S5aRS58JS37aS51bS4mS29dS6aS30eS6aS8wS24aS4aRS59JS35bS51cS5lS31cS35aS10bS3xS24aS4aRS60HS35aS50cS5kS20aS2aS2bS7cS42aS3FS30aRS60HS3"
 Packed$=Packed$+"4aS51bS5cS5bS3aS11aS2aS2aS2bS6bS42aS4DS30aRS60gS8wS25aS52aS2aS4bS6aS9aS2aS2aS2aS2bS4aS2aS2bS41aS5CS27aS2aRS59hS12tS22aS52aS2aS4b"
 Packed$=Packed$+"S14aS4aS2aS2dS6bS3bS41aS4CS29bRS59gS10vS23aS53aS6aS13aS3aS2aS2eS7fS50BS26aS3aRS57aS2fS9aS3qS76aS4aS12aS3aS2aS2fS8eS45aS4CS28bRS5"
 Packed$=Packed$+"8gS12uS92aS6aS2aS9eS44aS5cS4dS5nS17aS2aRS58fS11aS2qS101aS2bS4eS49aS10nS18bRS59fS9aS2qS94bS5gS8gS52aS2bS3aS4lS16cRS59cS4aS6aS2qS7"
 Packed$=Packed$+"7bS6aS5hS9fS10eS47aS2jS11lS16cRS67aS3qS77cS6aS5aS2mS15aS2gS47CS30bRS63aS2aS3tS19aS60cS7aS7jS13bS3fS10aS33GS33cS5aRS63dS6tS78cS6a"
 Packed$=Packed$+"S11aS8dS5gS10aS33aS2aS2CS28dS6bRS63cS4aS2aS2pS76cS5aS2aS5aS12eS6fS9aS36aS8aS2qS20dS6bRS63aS2bS3aS2pS77cS7cS8aS6aS2fS7eS55pS19dS7"
 Packed$=Packed$+"cRS64bS3aS2qS78dS7cS4aS8jS11eS9aS46pS20cS6cRS64eS6oS77cS7fS7aS3lS13eS8aS44aS2pS21cS5dRS60aS3xS73aS3aS2aS6cS6kS12kS12eS8aS37dS5vS"
 Packed$=Packed$+"24dS7cRS60BS72aS3aS6aS6aS2bS4AS24eS7aS38BS29dS6dRS60aS2AS68aS4aS4aS2aS8bS5FS69bS3wS25aS2bS5dRS59fS11aS2kS59aS5aS11aS3aS3FS71wS25"
 Packed$=Packed$+"aS2aS2bS4dRS58aS3aS14iS58aS2aS3aS11bS3GS73aS2tS21aS3cS6dRS57aS11aS2aS2aS2aS3eS6aS67bS3ES73tS24aS2bS4dRS64qS18aS68bS3ES72uS24aS2a"
 Packed$=Packed$+"S2aS3eRS62wS89aS2ES71aS2qS24aS2bS4dRS61uS20aS69eS6AS69qS25aS2aS3eRS59aS2fS7gS8fS72gS9aS2vS65aS2pS25bS4eRS59eS8aS10dS70hS11aS2tS6"
 Packed$=Packed$+"6oS24bS5dRS58cS18eS71hS12uS64bS3nS26aS2fRS76dS71gS10aS2uS65oS25aS5eRS75eS72gS11aS2qS69gS8bS13aS4dS5aRS62aS2aS2aS9eS73eS9aS2tS72c"
 Packed$=Packed$+"S4cS18fRS59kS16dS74bS8aS2qS74dS20fRS60lS14eS81bS3aS2pS92fRS58nS16dS79xS99eS6aRS59mS14eS80gS8nS91dS5aRS58uS94AS99dS5bRS57vS96wS98"
 Packed$=Packed$+"gRS56aS2tS94xS98hRS57aS2qS89bS4xS96iRS56aS2qS88aS2aS16jS85iRS56aS2bS3nS83aS11aS2aS2aS2bS3iS84hS9aRS57bS3nS89BS99fS7bRS59hS9dS80B"
 Packed$=Packed$+"S99aS2dS5cRS58aS2fS7dS5aS74aS2aS2iS10lS88iRS58aS3cS4aS2bS4aS75aS7bS3aS3mS89dS5cRS59aS5aS2bS4aS5aS70aS13mS90iRS65bS4aS6aS79aS2oS9"
 Packed$=Packed$+"3gRS64bS10aS77uS98fS7aRS73cS7aS70tS99cS4cRS72cS8cS70pS100eRS71dS8dS71oS100eRS69fS9eS69aS2mS101dS5aRS68fS10fS70aS2aS2gS18aS81dRS6"
 Packed$=Packed$+"5aS2aS2fS8gS84bS8aS82cRS64aS5eS8gS83cS7aS2bS82cRS65aS3eS8gS8aS73eS9aS2cS84bRS63aS4aS2dS7iS79gS10aS2aS2bS83bRS65aS3aS2bS6iS78aS2e"
 Packed$=Packed$+"S8aS2eS87aRS67aS8iS75aS2aS2gS11fS88aRS69aS5iS10aS65aS5aS2aS2bS6gRS68aS6kS74aS4aS5cS6aS2fRS73lS78aS4aS8hRS72lS82aS7jRS71nS79aS10j"
 Packed$=Packed$+"RS71mS88lRS70nS87mRS69nS15aS72nRS68pS86pRS68pS87oRS69nS87mRS70mS87lRS70lS13aS75aS2iRS70mS89iRS71jS11aS78gRS71iS10aS80eS6aRS72jS8"
 Packed$=Packed$+"9dS5aRS72iS90bS3aRS73gS90bRS73fS7aS84aRS73gRS74dS5aRS74eRS75cRS75bRS75bRS75aRRRRRRRR"


   StartTime=Timer()
      
   Angle#=180
         
   Do
      Cls 0

      ; Check how much time has past
      TimePast#=Timer()-StartTime

      ; calc the frames past since it started at a virtual 60fps
      FramesPast#=TimePast#/(1000/60.0)

      ; mult the frames past by the speed this object is fading
      Angle#=FramesPast#*0.5

      ; Use the angle as to control the brightness of the thing we're
      ; drawing.  In this case, depacking the RLE image from Strings :)        
      Level#=100+Cosradius(180+Angle#,100)      

      ;Decompress the string of RLE spans that mmake up this 2 colour image
      Decompress(Packed$,RgbFade($ffffff,Level#))

      ; draw the fps() 
      ink $ffffff
      print Fps()

      Sync
   loop
   



Function  Decompress(R$,ThisColour)

   // Build Chr codes$
   For lp =asc("a") to asc("x")
      ChrCODE$=ChrCODE$+Chr$(lp)
   next
   ChrCode$=ChrCode$+upper$(ChrCODE$)
   ChrCode$=replace$(chrCode$,"RS","",1,false,false)

   // Replace the chr codes with the values 
   For lp=len(ChrCOde$) to 1 step -1
      tag$="-"+str$(lp)+":"
      R$=replace$(R$,mid$(chrcode$,lp,1),tag$,yes,false,false) 
   next


   // Decode RLE (Run Lenght)
   Lockbuffer
   For pos=1 to Len(R$)
      ThisChr=mid(r$,pos)

      ; Start of Row
      if ThisChr=asc("R")
         ; reset Pen
         Xpos=0
         inc Ypos
         Continue
      endif

      ; Decode Span
      if ThisChr=asc("S")

         Pos2=Pos+1
         EndPos=INstring(R$,":",POs2,false)
         Span$=Mid$(R$,Pos2,Endpos-Pos2)                  
         
         MidPos=INstring(Span$,"-",1,false)
         
         XPos      =Xpos+val(CutRight$(Span$,MidPos))
         RunLength=(val(CutLeft$(Span$,MidPos)))

         Linec Xpos,Ypos,Xpos+RunLength,Ypos,ThisColour
                     
         pos=endPos
         Continue
      endif

   Next
   unlockbuffer

EndFunction




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