Now part 2 of the demo is also included into this archive and it is
~800KB in size :)

This archive includes some code that shows how you can
use systemfriendly BitBlits. It shows how palette sharing is
handled and how friendbitmaps can be used. 
The main goal is to show that it is possible to support both
native ECS/AGA and gfxboards with image blitting stuff and
how you can check out what is the best way to blit images.
The demo opens a window on the public screen (Workbench)
allocates pens for a red, a green and a blue shaded ball.
Also a background pen is allocated and the color is cycled throu
a color table. The balls are moved around the window.
It runs on any displaymode, independend if gfx board or not or
what color depth you use (though I haven't tried 24 bit modes yet).

Within a talk to another programmer I found that there is some
need on information on this topic. So I thought I should release
such an archive. Feel free to do what ever you want with this archive
(except selling it and making money:)
As this example could also to be used to write board friendly games,
it is dedicated to these people out there who are still thinking
palette sharing etc. is useless...why can't I have white backgrounds
on some text manipulation programs ?

New: Chunky Friend Allocation has been fixed (BMF_MINPLANES)

     30.11.96 Minor changes to the code (inner sizes are calculated right)

Please, also see the ReadMe included in this archive.

-----------------------------------------------------------------------------

Part 2 Readme:

I have now included the part 2 into this archive, also the Image is available
in source code. I also fixed the rastport bug I had in part 2 before , 
and also I forgot to free the background in the last release... 
(what a shame, I know =:~/ )


This archive contains some example material how scrolling
bitmaps could be handled. It is just an example how things 
could be done, because I am bretty sure, none of you will
use ScollLayers() in a SuperBitmap window for a real application.
But with a fast board (e.g. a PiccoloSD64) and a good driver
(e.g. EGSPlus :) it shows what could be done if the Amiga
would have the right chips.
This demo opens a 320x256 window on any screen (currently a
WB clone or the WB itself) with a 640x512 custom superbitmap
attached to it. The backdrop is a 256 color image (640x512)
which is scrolled thru the window. On top of it a green ball is
jumping around. Both images where created in 24 bit and color
reduced to 256 colors. The real colors are calculated on startup 
using a shared palette. It looks best when run on a 256 color
screen (but will reduce the colors if less). It should run on any
board (ECS/AGA too) but isn't really useable on native amiga chips...
I haven't tried CyberGraphics yet (but I should) but I think it
would run more smoothly on EGS systems (with EGSPlus) since
the SuperBitMap is held in boardmemory in this case which makes
the scrolling much better :)

It does no buffer blitting yet (e.g. double buffer, refresh buffer or such).
And it does not use an custom scrolling code, which would sure
help for slow boards...(e.g. a delta frame scrolling would be a lot
faster).
But maybe you find some things what would be intuitiv for your ideas.
So check it out ... and if you have a fast EGS board enjoy :)

PS.: I haven't either included the Backdground image nor the Image source
since this have about 1.2 MB...the object code should be ok if
you want to recompile it.
The colortableformat is a modified Amiga Colortable format
and looks like this:

struct Colors
{
    ULONG red,green,blue; // left justified 32 bits
} colors[256];

all other things should be clear from the source code. You should be
able to hook another image in ...


---
Jürgen Schober
Graz · Austria
e-mail: point@sbox.tu-graz.ac.at (private)
        jschober@campusart.com   (business)
WWW:    http://www.sbox.tu-graz.ac.at/home/point/Welcome.html
        http://www.pointdesign.campusart.com/

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                10256   21480  47.7% -lh5- 21f2 Dec  2  1996 How2UseGfxV39/ball
[generic]                 7439   30273  24.6% -lh5- 207b Dec  1  1996 How2UseGfxV39/ball.c
[generic]                 1889    4258  44.4% -lh5- 5400 Nov 30  1996 How2UseGfxV39/ball.c.info
[generic]                  670    1007  66.5% -lh5- 3148 Nov 30  1996 How2UseGfxV39/ball.info
[generic]                  465    1201  38.7% -lh5- aa4f Nov 27  1996 How2UseGfxV39/ball.¶
[generic]                 1416    4042  35.0% -lh5- 4549 Nov 30  1996 How2UseGfxV39/ball.¶.info
[generic]                  107     179  59.8% -lh5- 7279 Dec  2  1996 How2UseGfxV39/ball_rev.h
[generic]                  120     221  54.3% -lh5- a2ff Dec  2  1996 How2UseGfxV39/ball_rev.i
[generic]                    4       4 100.0% -lh0- a58c Dec  2  1996 How2UseGfxV39/ball_rev.rev
[generic]                  638    1992  32.0% -lh5- c7f4 Nov 22  1996 How2UseGfxV39/BallMask.iff
[generic]                 1194    1752  68.2% -lh5- 4e24 Nov 30  1996 How2UseGfxV39/BallMask.iff.info
[generic]                 1295   13095   9.9% -lh5- d33c Nov 27  1996 How2UseGfxV39/BallMaske.h
[generic]                 2030    4263  47.6% -lh5- 2d46 Nov 30  1996 How2UseGfxV39/BallMaske.h.info
[generic]                 1050    4022  26.1% -lh5- dbed Nov 27  1996 How2UseGfxV39/BlueBall.h
[generic]                 1430    4256  33.6% -lh5- 968a Nov 30  1996 How2UseGfxV39/BlueBall.h.info
[generic]                 1826   14908  12.2% -lh5- a0e8 Nov 22  1996 How2UseGfxV39/BlueBall.iff24
[generic]                 1199    1752  68.4% -lh5- d67f Nov 30  1996 How2UseGfxV39/BlueBall.iff24.info
[generic]                 1396    2066  67.6% -lh5- 42eb Nov 22  1996 How2UseGfxV39/BlueBall8.iff
[generic]                 1197    1752  68.3% -lh5- bc03 Nov 30  1996 How2UseGfxV39/BlueBall8.iff.info
[generic]                  689    1392  49.5% -lh5- 6d16 Nov 30  1996 How2UseGfxV39/Build.info
[generic]                  282     328  86.0% -lh5- 43a8 Nov 22  1996 How2UseGfxV39/copyp2c.o
[generic]                 1711    2632  65.0% -lh5- a81a Nov 22  1996 How2UseGfxV39/Debug
[generic]                  775    1420  54.6% -lh5- b4f1 Nov 30  1996 How2UseGfxV39/Debug.info
[generic]                  742    1436  51.7% -lh5- 2a29 Nov 30  1996 How2UseGfxV39/Find.info
[generic]                 1342    4087  32.8% -lh5- b422 Nov 30  1996 How2UseGfxV39/GreenBall.h
[generic]                 1573    4256  37.0% -lh5- a864 Nov 30  1996 How2UseGfxV39/GreenBall.h.info
[generic]                 2433   15684  15.5% -lh5- a2d8 Nov 22  1996 How2UseGfxV39/GreenBall.iff24
[generic]                 1195    1752  68.2% -lh5- eb72 Nov 30  1996 How2UseGfxV39/GreenBall.iff24.info
[generic]                 1569    2088  75.1% -lh5- c707 Nov 22  1996 How2UseGfxV39/GreenBall8.iff
[generic]                 1198    1752  68.4% -lh5- 9529 Nov 30  1996 How2UseGfxV39/GreenBall8.iff.info
[generic]                 1914    4019  47.6% -lh5- 3210 Nov 25  1996 How2UseGfxV39/ReadMe
[generic]                  763    1154  66.1% -lh5- 4788 Nov 30  1996 How2UseGfxV39/ReadMe.info
[generic]                 1166    4016  29.0% -lh5- 3e98 Nov 27  1996 How2UseGfxV39/RedBall.h
[generic]                 1218    4022  30.3% -lh5- a501 Nov 22  1996 How2UseGfxV39/RedBall.h.bak
[generic]                 2047    4256  48.1% -lh5- 5b3b Nov 30  1996 How2UseGfxV39/RedBall.h.info
[generic]                 2083   15782  13.2% -lh5- d92b Nov 22  1996 How2UseGfxV39/RedBall.iff24
[generic]                 1198    1752  68.4% -lh5- 54a1 Nov 30  1996 How2UseGfxV39/RedBall.iff24.info
[generic]                 1499    2080  72.1% -lh5- 1af0 Nov 22  1996 How2UseGfxV39/RedBall8.iff
[generic]                 1196    1752  68.3% -lh5- 211f Nov 30  1996 How2UseGfxV39/RedBall8.iff.info
[generic]                   81     113  71.7% -lh5- f059 Dec  2  1996 How2UseGfxV39/SCOPTIONS
[generic]                 1748    3147  55.5% -lh5- 9e3b Nov 30  1996 How2UseGfxV39/SCoptions.info
[generic]               369836 1197099  30.9% -lh5- 18ce Dec  1  1996 How2UseGfxV39/ScrollGround.c
[generic]                 1140    1608  70.9% -lh5- 2e68 Nov 30  1996 How2UseGfxV39/ScrollGround.c.info
[generic]                  428    1010  42.4% -lh5- 6584 Dec  1  1996 How2UseGfxV39/smakefile
[generic]                  996    1612  61.8% -lh5- 7bff Nov 30  1996 How2UseGfxV39/smakefile.info
[generic]                  828    8431   9.8% -lh5- cb01 Nov 23  1996 How2UseGfxV39/Spectrum.h
[generic]                 1743    4255  41.0% -lh5- e7bd Nov 30  1996 How2UseGfxV39/Spectrum.h.info
[generic]               265691  350996  75.7% -lh5- 92d3 Dec  2  1996 How2UseGfxV39/SuperScroll
[generic]                 8688   37094  23.4% -lh5- ba6f Dec  2  1996 How2UseGfxV39/SuperScroll.c
[generic]                 1886    4258  44.3% -lh5- 6cde Nov 30  1996 How2UseGfxV39/SuperScroll.c.info
[generic]                  667    1007  66.2% -lh5- 3f67 Nov 30  1996 How2UseGfxV39/SuperScroll.info
[generic]                  115     200  57.5% -lh5- e909 Dec  2  1996 How2UseGfxV39/SuperScroll_rev.h
[generic]                  128     242  52.9% -lh5- f16f Dec  2  1996 How2UseGfxV39/SuperScroll_rev.i
[generic]                    4       4 100.0% -lh0- f4cc Dec  2  1996 How2UseGfxV39/SuperScroll_rev.rev
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        54 files  716193 1799259  39.8%            Dec  7  1996