readme.txt

DC的SEGA_GG模拟器源代码

      DCP - Dreamcast Compressed Picture      
                  by  Steven                  
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This is a modification of Snoozy's DBP image
loader (Dreamcast Binary Picture). This
modification uses RNC data compression to
compress the files.

Why DCP ? Well I got bored of using the same
format over and over again, GIF, JPEG, BMP,
PCX, PNG, etc, so i checked out Snoozy's
DBP and liked it, the only downsize is that
his images were large, well they were almost
identicle to BMP's, just using a different
header, so I simply decided to add in a
compression routine, and do slight modifications
and this is the result. DCP.

Use the DBP Toolkit available at Snoozy's
website to convert a GIF/JPEG/BMP to the
DBP format. Then use rnc.bat <filename> to
compress the image into the RNC format.

To use, simply add this line to the top of
your C file,
       #include "dcp_image.h"

       dcp_init(size);

before calling dcp_image, where size is
its the ammount of ram you want allocated
for image decompression, if you are unsure
just use 1000000 for now, if you still get
errors try put it upto 2000000, but dont
go crazy and do stuff like 10000000, as
that'd allocate 10mb of Ram, which would
kinda be a waste.

and use this command to display an image,
which will be loaded of a CD,:

       dcp_image(char *fn, intxpos, intypos);

 char *fn = image filename (eg "/IMG/SPLASH.RNC")
 intxpos = x position for the image to be displayed at
 intypos = y position for the image to be displayed at

Malloc:
 As of this version, there is an included
 malloc, but if you have a better malloc
 then feel free to use that instead, just
 remove the line which says,
        #include "malloc.c"

Known Issues:
 There are some weird issues if a lot of images
 are displayed, but I cant seem to get this to
 happen again, if you experience any type of errors
 please email me.

 Future versions may simply be added to Turrican2k's
 Allegro type library for the Dreamcast. The only
 difference is that you will just have to blit it to
 the screen each time you want it displayed.

 If someone has a working free function plus a
 better malloc please send it in, and I will
 implement it immediatly.

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DCP (c) 2001 Steven (ss_teven)
DBP (c) 2001 Snoozy

for DCP visit
   http://devcast.dcemulation.com

for DBP visit
   http://www.snoozys-dc-stuff.be.tf