Changes between Version 1 and Version 2 of Develop/FileFormats/PKM

Timestamp:

Jan 19, 2018, 10:34:10 AM (6 years ago)

Author:

PulkoMandy

Comment:

--

Develop/FileFormats/PKM

@@ -97 +97 @@
 = The PICTURE PACKING METHOD: =
 
-  The PKM compression method is some sort of Run-Length-Compression which is
-very efficient on pictures with long horizontal color repetitions.
-  Actually, the compression is efficient if there are often more than 3 times
-the same color consecutively.
-
-  I think that it would be better to give you the algorithm instead of swim-
-ming in incomprehensible explanations.
-
-{{{
+The PKM compression method is some sort of Run-Length-Compression which is very efficient on pictures with long horizontal color repetitions.
+
+Actually, the compression is efficient if there are often more than 3 times the same color consecutively.
+
+I think that it would be better to give you the algorithm instead of swimming in incomprehensible explanations.
+
+{{{#!C
   BEGIN
     /*
@@ -182 +180 @@
 }}}
 
-  For example, the following sequence:
-    (we suppose that Pack_byte=01 and Pack_word=02)
+For example, the following sequence (we suppose that Pack_byte=01 and Pack_word=02):
+
+{{{
     04 03 01 05 06 03 02 00 01 2C
-  will be decoded as:
+}}}
+
+will be decoded as:
+
+{{{
     04 03 05 05 05 05 05 05 03 00 00 00 ... (repeat 0 300 times (012Ch=300))
+}}}
 
   Repetitions that fit in a word must be written with their higher byte first.
@@ -196 +200 @@
 == Packing advices: ==
 
-  * As you can see, there could be a problem when you'd want to pack a raw
-  pixel with a color equal to Pack_byte or Pack_word. These pixels should
-  always be coded as a packet even if there is only one pixel.
-
-    Example: (we suppose that Pack_byte=9)
-      9   will be encoded 9,9,1     (The 1st 9 in the encoded...
-      9,9 will be encoded 9,9,2     ... sequence is Pack_byte)
-      etc...
+* As you can see, there could be a problem when you'd want to pack a raw pixel with a color equal to Pack_byte or Pack_word. These pixels should always be coded as a packet even if there is only one pixel.
+
+Example: (we suppose that Pack_byte=9)
+* {{{9}}}   will be encoded {{{9,9,1}}}     (The 1st 9 in the encoded sequence is Pack_byte)
+* {{{9,9}}} will be encoded {{{9,9,2}}}
+* etc...
 
   * It seems obvious to find values for Pack_byte and Pack_word that are