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1993-10-12
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Xlib version 2 modifications
Files modified:
XLIB.INC
XMAIN.ASM
DEMO.C
26-09-92 - PRIMARILY JUST ADDED SUPPORT FOR PEL PANNING
Pel panning code added to allow for panning to any pixel
coordinates.
Functions affected:
x_set_splitscreen
Split screen pel panning suppression code added.
Functionally unchanged.
x_set_start_addr,x_page_flip
Pel panning code added. The x parameter now expects
a pixel coordinate where previously a byte coordinate
was expected.
Original files modified
-----------------------
XLIB.INC
XMAIN.ASM
DEMO.C
Aknowledgements
---------------
Thanks to Robert Schmidt for contributed PEL panning sample
code and everyone else who responded to my rec.games.programmer
post.
Xlib version 3 modifications
10-10-92 - BUG ERADICATION AND ADDITION OF NEW MODULES AND MINOR CODE
EXTENSIONS
MaxScrollX and MaxScrollY were not always set correctly, now
that's fixed (I Think)
Added variable "SplitScrnVisibleHeight" needed for above fix.
Some miscellaneous code changes
Included XCBITMAP module generously donated by Matthew MacKenzie
Added support for the LARGE memory model
Added a make file to simplify compilation
Library modules now compiled into .LIB files
Added a documentation file
Added XBMTOOLS module containing bitmap type conversion
Added XDETECT module containing hardware detection functions
Added C header files for all modules
ADDED XFILEIO module
ADDED XRLETOOL module
Original files modified
-----------------------
XLIB.INC
XMAIN.ASM
DEMO.C
XTEXT.INC
XTEXT.ASM
Aknowledgements
---------------
Special thanks to Matthew Mackenzie for an excellent module
and Darren Lyon for putting together a C header file for XLIB.
Again thanks also to everyone else who supported this software.
Xlib version 4 modifications
30-10-92 EXTENSIONS TO XLIB 3 AND BUG FIXES
Files Modified
--------------
Assume all have been modified
Modifications/Additions
------------------------
**** Fixed ATI VGA incompatibility problem **** 4
**** Fixed Large Model problems ***************
Manual : The ref. manual has been split ito two files for
those editors that cannot cope with file > 64k
XDETECT: added numeric co-pro detection
added mouse driver detection
XMAIN : added new resolution tweaks
added clipping rectangle setting proc and vars
further bug fixes (I can't remember exactly what)
XCBITMAP:Improved performance of compilation and compiled bitmaps
and added a function to calculate mem required for
a bitmap compilation
XPBITMAP:Improved performance of planar bitmaps
XRECT :Added "x_shift_rect" function
XPBMTOOL:Added several utility macros
New Modules
-----------
XPBMCLIP:Implements clipping versions of functions in XPBITMAP
XVBITMAP:Video based masked bitmap functions. Contains standard
and clipping versions of all functions.
XMAKEVBM:Support module for XVBITMAP
XMOUSE :Basic mouse support module
XBEZIER :Fast Bezier curves (For scalable fonts etc..)
Xlib version 4b modifications
10-12-92 BUG FIX RELEASE
Files Modified
--------------
XMAIN.*
XPBMCLIP.*
XVBMCLIP.*
XCLIPPBM.*
Modifications/Additions
------------------------
Some minor fixes and modifications in xmain.asm
fixed the split screen starting scan line problem
This fix is a cludge - Sam Thompson has suggested a more
elegant fix but I just dont have much time these days
changed mode setting code to allow 320x200 mode to have same
aspect ratio as mode 13h
The clipped functions were modified to return 1 if the image being
clipped was completely off the logical screen.
Minor clipping bugs which gave inconsistent results when clipping
to the left and right screen borders were fixed in the XPBMCLIP &
VBMCLIP modules.
A bug in demo 2 which caused crashing on 486 machines was also
fixed. (The speed of the 486 resulted in 0 time delay which inturn
caused a division by zero error)
28-12-92 Modified PEL panning code to be smoother on snail paced PC's
Added quick & dirty planar bitmap compiler
15-2-93 Converted text module to allow variable width user fonts
Added a function x_get_char_width in module xtext
Added fonts var6x8.fnt varswisl.fnt varswisb.fnt
Clened up virt screen start address setting code in xmain.asm
Added demo 8 to preview user defined fonts
Added x_wait_vsync in module xmain
Fixed a bug with mode sets on some VGA bios'es that dont
preserve CX on an int 10h
18-8-93 XLIB05 Final Release
-----------------------------------------------
GENERAL:
Added C++ compatability in header files
Added new fonts
XDETECT: now can differentiate between 386sx 386dx and 486
(486sx can be verified by absence of FPU)
XMOUSE:
Fixed x_mouse_position bug and general xmouse improvements
Added x_mouse_window function
XFILEIO:
Modified f_read and f_write functions xfileio module
f_read - now reads into near buffer reguardless of model
f_readfar " " " far " " " "
f_write " writes " near " " " "
f_writefar " " " far " " " "
Added f_tell function to get file position. I beleive I
improved the error handling a little but I cant remember
for sure.
XMAIN:
Added 2 new resolutions 256x200 & 256x240.
I dont know why you'd want them but theyre there if you do.
These came from Draeden of VLA (Did you write them Ben ?)
I think they may have originally been posted on R.G.P ???
XRECT:
Added x_rect_fill_clipped & x_rect_pattern_clipped, probably
useless but what the heck!
XPOLYGON:
New function x_triangle - a fast clipped and filled trinagle
function ideal for 3D work.
x_polygon - a clipped and filled polygon function (convex
polygons only). This one's not the fastest - it splits
polygons into component triangles and uses the above
triangle routine to draw them, but still it should
perform fast enough for most 3D applications.
MISCELLANEOUS:
xdiscuss.zip: Included Robert Schmidt's excellent mode X article
for those interested in the hows and why's of Mode X progamming
xlibtl02.zip: Some bitmap conversion code and a TSR bitmap
capture program.
Aknowledgements
---------------
Gerald Dalley - For getting me off my butt and doing
this release.
Steve Dollins - Never returned my mail asking for
permission to use his code so I
assumed it'd be OK ;)
Christian Harms - For suggesting xdetect improvements and
promising to make XLIB for T.P. freeware
when its complete. good on ya mate!
Jason Truong - For spotting the bug in xmouse and
general suggestions for improvements
Chris Kirby - For suggestion to make .h files C++
compliant
Robert Scmidt - For his mode X article.
jeremi@ee.ualberta.ca - Thanks for the xtext suggestions
(name unknown) even if they didnt make this release
And others whom I may have forgotten.
Also Greetings to my internet pals,
Mat Mackenzie, Jari Karjala, Draeden, Victor Putz,
Josh Jensen, Chicken and the rest of you dudes...
Thanks for helping my productivity live up to
"Public Servant" standards ;-))
5-10-93
-----------------------------------------------
XCBITM32:
32 bit compiled bitmaps, originally developed by Matthew
Mackenzie for our game. NOTE: The compiler is written in C -
conversion to assembler is left as an excersise for the user :-)
XMOUSE: Finished x_mouse_window this time. I had overlooked
its semi-completed x_mouse_window function in the last release.
XPBITMAP:
Added x_flip_pbm and x_flip_masked_pbm
Identical to x_put_pbm and x_put_masked_pbm but have an
extra parameter which indicates whether the bitmap is flipped
from left to right as drawn or not - Ideal for saving bitmap
memory.
XFILL:
Added a new module containing 2 flood fill variants. Both return
the number of pixels filled.
XVSYNC:
New module to synchronise timer 0 to the vertical retrace. This
allows for smoother animation due to the elimination of
unnecessary vsync waiting.
XMAIN:
Modifications to allow standard vsync polling or optional
timer0/vsync synchronization and new support for tripple
buffering for super-smooth animation. This stuff's way cool!
BUGS:
fixed the odd bug here and there - nothing too serious.
Aknowledgements:
Tiaan A Geldenhuys - for pointing out that I forgot to finish
some code in xmouse.asm, for the new cursor shape and stuff.
Thanks to Tore Jahn Bastiansen (toreba@ifi.uio.no) for the
tripple buffering extensions to XMAIN and the excellent
Timer vsync sunchronization which is the highlight of this
release. This module is a "MUST HAVE" if youre going to do
any animation.
Also thanks to any others, whom I may have lost track of,
for bug fixes'n stuff.
Apologies to the person who sent me the pbm flipping code.