Deutex Gfx compression
- From: Andrew Apted <aapted@xxxxxxxxxxxxxxx>
- To: yadex@xxxxxxxxxxxxx
- Date: Thu, 25 Dec 2003 15:46:44 +1100
Hey,
Attached is a patch to Deutex 4.4.0 which compresses Doom
graphics a bit [removes duplicate columns]. It's probably
too slow to include as-is, maybe needs an option, I dunno,
posting here in case someone is interested.
Merry Christmas to all,
--
Andrew Apted <ajapted@xxxxxxxxxxxxxxxxxxxxx>
--- src/picture.c.org 2003-12-25 12:36:43.000000000 +1100
+++ src/picture.c 2003-12-25 12:45:12.000000000 +1100
@@ -34,6 +34,7 @@
#include "color.h"
#include "usedidx.h"
+int pic_compress = 1;
/*
* parse_pic_header
@@ -471,7 +472,39 @@
write_i16_le (&pichead->Yinsr, Yinsr);
colnpos=colnbase;
for(x=0;x<rawX;x++)
- { write_i32_le (ColOfs + x, colnpos);
+ { if (pic_compress)
+ {
+ /* AJA 2003-12-25: PIC compression, when two columns are exactly the
+ * same then we only need to store the pixels for one, and make both
+ * column pointers point to it.
+ */
+ Int16 x2,y2;
+ char pix2;
+ for (x2 = x-1; x2 >= 0; x2--)
+ {
+ for(y2 = 0; y2 < rawY; y2++)
+ {
+ rawpos=((Int32)x)+((Int32)rawX)*((Int32)y2);
+ pix=raw[rawpos];
+
+ rawpos=((Int32)x2)+((Int32)rawX)*((Int32)y2);
+ pix2=raw[rawpos];
+
+ if (pix != pix2)
+ break;
+ }
+
+ if (y2 == rawY) // SAME !
+ break;
+ }
+
+ if (x2 >= 0)
+ {
+ ColOfs[x] = ColOfs[x2];
+ continue;
+ }
+ }
+ write_i32_le (ColOfs + x, colnpos);
setpos=0;
lastpix=transparent;
for(y=0;y<rawY;y++)
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