Subject:
Microwindows v0.86
From:
"Greg Haerr" ####@####.####
Date:
29 Oct 1999 03:24:28 -0000
Message-Id: <030d01bf21ab$52caa640$15320cd0@gregh>
I have posted an update v0.86 to Microwindows/nano-X at
ftp://microwindows.censoft.com/pub/microwindows/microwindows-0.86.tar.gz
This version completes a major effort, that of implementing off-screen
drawing,
as well as screen-to-screen blitting. The screen driver interface had to
change
to accomodate this, and I had to rewrite all the screen drivers. In
addition, the
blitting routines were written for 1, 2, 4, 8, 16 and 32bpp linear
framebuffer devices,
as well as the 16 color 4 planes vga (this was a royal pain...) The
blitting
uses a clipping region traversal algorithm so that blitting is always high
speed,
even when the destination window is partly obscured.
This release also auto-detects most Linux framebuffer implementations, and
should have a compiled in driver for it.
In addition I have posted Linux, ELKS and MSDOS binaries, as well as
screenshots
for those that don't have the time:
ftp://microwindows.censoft.com/pub/microwindows/SreenShots
ftp://microwindows.censoft.com/pub/microwindows/LinuxExamples
ftp://microwindows.censoft.com/pub/microwindows/ElksExamples
ftp://microwindows.censoft.com/pub/microwindows/DosExamples
The standard Microwindows demo is now a graphical terminal emulator, mterm.
(No,
it doesn't run vi yet, and it doesn't repaint it's screen contents, but it
will ;-) This demo
requires screen-to-screen blitting for scrolling. The 3d graphics demo now
uses
offscreen blitting to enhance (read no flicker) the display. Check it out.
There is also some experimental full-blown region handling code included,
which
uses X11's y-x banding region algorithms. (This stuff is truly for those
with
extra time and brains). It is currently not compiled in, but can be
included
by replacing devclip.c with devclip2.c. In the next release, arbitrary
multi-rectangle
clipping regions will be available. I also plan on implementing separate
clip regions
from update regions for windows, with the system computing the update region
as a subset of the clip region. Anyway, this sophisticated region handling
is
required for smart window painting as well as higher end graphics
primitives.
Eventually, this will also allow separate source and destination clipping
for bitblit
operations. Only destination clipping is working now.
The next release will have a reorganized directory structure, allowing
separate
development of nano-X, widgets, core engine, and microwindows. I plan
on moving the whole thing to a CVS soon. BTW, Microwindows now supports
three processor families, according to reports emailed me. We've got i386,
8086,
MIPS Vr41xx, and ARM families running ;-)
Following is a summary of the ChangeLog:
Version 0.86 - 28th October 1999 - ####@####.####
* merged framebuffer, elks and msdos vga 16 color 4 planes drivers
* wrote vga bitbit routines (a herculean effort)
* optimized bitblit by traversing window clip region
* added experimental multi-rectangle dynamically allocated regions
* wrote scrolling terminal emulator demo for microwindows
* added WM_FDINPUT msg, WndRegisterFdInput call for terminal emulator
* changed SCREENINFO struct, removed black/white, added bpp, planes
* added offscreen (memory DC) drawing to microwindows
* added BitBlt, CreateCompatibleBitmap, CreateCompatibleDC, DeleteDC
* retired BOGL library, must use new interface for blitting
* converted framebuffer, svgalib, elks and msdos screen drivers
* (we need blit routines for herc and svgalib still)
* major screen driver interface change, old drivers not compatible
Greg
