<s>
Retargetable	O
graphics	O
(	O
abbreviated	O
as	O
RTG	O
)	O
is	O
a	O
device	B-Application
driver	I-Application
API	B-Application
mainly	O
used	O
by	O
third-party	O
graphics	O
hardware	O
to	O
interface	O
with	O
AmigaOS	B-Application
via	O
a	O
set	O
of	O
libraries	B-Library
.	O
</s>
<s>
The	O
software	B-Library
libraries	I-Library
may	O
include	O
software	O
tools	O
to	O
adjust	O
resolution	B-General_Concept
,	O
screen	O
colors	O
,	O
pointers	O
,	O
and	O
screenmodes	O
.	O
</s>
<s>
The	O
Amiga	B-Application
OS	I-Application
3.x	O
intuition.library	B-Application
is	O
limited	O
to	O
8-bit	O
display	O
depths	O
,	O
but	O
RTG	O
libraries	B-Library
make	O
it	O
possible	O
to	O
handle	O
higher	O
depths	O
such	O
as	O
24	O
bits	O
;	O
on	O
Amiga	B-Device
there	O
are	O
two	O
common	O
APIs	B-Application
:	O
Picasso	O
96	O
and	O
CyberGraphX	O
,	O
which	O
are	O
almost	O
compatible	O
with	O
each	O
other	O
.	O
</s>
<s>
Both	O
Picasso	O
96	O
and	O
CyberGraphX	O
require	O
at	O
least	O
4MB	O
RAM	O
and	O
a	O
68020	B-Device
CPU	O
to	O
operate	O
.	O
</s>
<s>
Although	O
Commodore	O
planned	O
to	O
introduce	O
retargetable	O
graphics	O
in	O
future	O
version	O
of	O
AmigaOS	B-Application
(	O
4.0	O
)	O
,	O
the	O
company	O
was	O
not	O
able	O
to	O
deliver	O
such	O
solution	O
before	O
its	O
demise	O
.	O
</s>
<s>
Third-party	O
graphics	O
card	O
manufacturers	O
were	O
thus	O
forced	O
to	O
create	O
their	O
own	O
software	O
layers	O
on	O
top	O
of	O
AmigaOS	B-Application
,	O
incompatible	O
with	O
each	O
other	O
.	O
</s>
<s>
Most	O
of	O
these	O
early	O
Amiga	B-Device
graphics	O
card	O
drivers	O
shared	O
common	O
limitations	O
:	O
compatibility	O
with	O
current	O
applications	O
was	O
maintained	O
by	O
opening	O
Workbench	O
(	O
or	O
also	O
other	O
application	O
screens	O
,	O
also	O
known	O
as	O
"	O
Workbench	O
emulation	O
"	O
)	O
on	O
the	O
graphics	O
cardusually	O
in	O
16	O
(	O
under	O
AmigaOS	B-Application
2.x	O
)	O
or	O
256	O
colours	O
(	O
under	O
AmigaOS	B-Application
3.x	O
)	O
;	O
full	O
graphics	O
card	O
features	O
like	O
high-colour	O
(	O
15	O
-	O
or	O
16-bit	O
)	O
and	O
true-colour	O
(	O
24	O
-	O
or	O
32-bit	O
)	O
display	O
could	O
be	O
used	O
only	O
by	O
applications	O
directly	O
programmed	O
for	O
such	O
driver	B-Application
software	I-Application
.	O
</s>
<s>
Earliest	O
of	O
these	O
solutions	O
like	O
Grafexa	O
and	O
SAGE	O
libraries	B-Library
were	O
able	O
to	O
display	O
only	O
their	O
own	O
applications	O
on	O
the	O
graphics	O
card	O
without	O
any	O
support	O
for	O
"	O
Workbench	O
emulation	O
"	O
.	O
</s>
<s>
Of	O
these	O
,	O
Picasso	O
offered	O
good	O
compatibility	O
with	O
older	O
applications	O
,	O
because	O
most	O
OS-compliant	O
programs	O
could	O
be	O
promoted	O
to	O
graphics	O
card	O
display	O
,	O
and	O
relatively	O
strong	O
software	O
support	O
.	O
</s>
<s>
Enhanced	O
Graphics	O
System	O
(	O
EGS	O
)	O
was	O
developed	O
by	O
Viona	O
Development	O
using	O
the	O
Cluster	O
language	O
(	O
a	O
Modula-2	B-Language
derivative	O
)	O
for	O
Piccolo	O
and	O
Spectrum	O
graphics	O
boards	O
,	O
supporting	O
screen	O
depths	O
up	O
to	O
24	O
bits	O
.	O
</s>
<s>
EGS	O
was	O
first	O
presented	O
with	O
the	O
EGS	O
110/24	O
card	O
(	O
GVP	O
)	O
at	O
the	O
World	O
of	O
Commodore/Amiga	O
show	O
in	O
New	O
York	O
in	O
April	O
1992	O
.	O
</s>
<s>
It	O
supported	O
a	O
broader	O
range	O
of	O
graphics	O
cards	O
than	O
other	O
drivers	O
and	O
was	O
seen	O
by	O
some	O
Amiga	B-Device
magazines	O
as	O
the	O
next	O
RTG	O
standard	O
for	O
Amiga	B-Device
,	O
but	O
its	O
compatibility	O
with	O
most	O
Amiga	B-Device
applications	O
was	O
limited	O
.	O
</s>
<s>
CyberGraphX	O
(	O
pronounced	O
"	O
cybergraphics	O
"	O
and	O
often	O
abbreviated	O
as	O
"	O
CGX	O
"	O
)	O
,	O
is	O
a	O
retargetable	O
graphics	O
API	B-Application
for	O
the	O
Amiga	B-Device
and	O
compatible	O
computer	O
systems	O
developed	O
by	O
Thomas	O
Sontowski	O
and	O
Frank	O
Mariak	O
and	O
later	O
adopted	O
by	O
Phase5	O
for	O
use	O
with	O
their	O
graphics	O
cards	O
.	O
</s>
<s>
Many	O
other	O
graphics	O
card	O
manufacturers	O
that	O
offered	O
hardware	O
for	O
Amiga	B-Device
and	O
compatible	O
systems	O
also	O
used	O
it	O
.	O
</s>
<s>
Being	O
available	O
free	O
of	O
charge	O
for	O
users	O
of	O
supported	O
cards	O
,	O
it	O
became	O
the	O
de	O
facto	O
RTG	O
standard	O
for	O
Amiga	B-Device
.	O
</s>
<s>
CyberGraphX	O
V4	O
was	O
the	O
last	O
release	O
for	O
AmigaOS	B-Application
;	O
MorphOS	O
uses	O
CyberGraphX	O
V5	O
.	O
</s>
<s>
Picasso96	O
is	O
the	O
RTG	O
device	B-Application
driver	I-Application
library	O
set	O
used	O
by	O
the	O
Picasso	O
IV	O
and	O
other	O
graphics	O
boards	O
.	O
</s>
<s>
Picasso96	O
was	O
selected	O
as	O
the	O
RTG	O
standard	O
for	O
AmigaOS	B-Application
4	I-Application
,	O
at	O
first	O
released	O
as	O
a	O
68k	O
binary	O
in	O
AmigaOS	O
4.0	O
pre-release	O
,	O
with	O
a	O
full	O
PowerPC	O
port	O
following	O
later	O
in	O
2004	O
in	O
the	O
next	O
OS	B-General_Concept
update	O
.	O
</s>
<s>
Picasso96	O
as	O
used	O
by	O
AmigaOS	B-Application
4	I-Application
supports	O
also	O
Voodoo	B-Device
3	I-Device
,	O
Voodoo	B-General_Concept
4/5	I-General_Concept
,	O
and	O
Radeon	B-Device
R100	I-Device
,	O
R200	B-Device
,	O
R300	B-Device
,	O
R520	B-Device
(	O
X1000	O
Series	O
)	O
,	O
R700	B-Device
(	O
HD	O
4000	O
Series	O
)	O
,	O
HD	O
5000	O
(	O
Evergreen	O
)	O
series	O
,	O
HD	O
6000	O
(	O
Northern	O
Islands	O
)	O
series	O
,	O
and	O
HD	O
7000	O
(	O
Southern	O
Islands	O
)	O
series	O
.	O
</s>
<s>
The	O
RadeonHD	O
AmigaOS	B-Application
4	I-Application
driver	O
is	O
created	O
and	O
maintained	O
by	O
Hans	O
de	O
Ruiter	O
.	O
</s>
<s>
Ongoing	O
development	O
of	O
the	O
driver	O
for	O
the	O
AmigaOS	B-Application
platform	O
being	O
exclusively	O
funded	O
and	O
owned	O
by	O
A-EON	O
Technology	O
Ltd	O
.	O
</s>
<s>
In	O
2017	O
,	O
rights	O
on	O
the	O
Picasso96	O
system	O
for	O
classic	O
68K	O
Amiga	B-Device
Systems	O
were	O
bought	O
by	O
Individual	O
Computers	O
(	O
iComp	O
)	O
.	O
</s>
<s>
iComp	O
added	O
features	O
such	O
as	O
screen	O
dragging	O
in	O
version	O
3.0.0	O
and	O
multi-monitor	O
support	O
in	O
version	O
3.1.0	O
(	O
Amiga	B-Device
OCS/ECS/AGA	O
screen	O
and	O
RTG	O
screen	O
active	O
at	O
the	O
same	O
time	O
)	O
.	O
</s>
<s>
The	O
higher	O
level	O
API	B-Application
was	O
created	O
by	O
Steffen	O
Haeuser	O
for	O
developing	O
2D	O
and	O
3D	O
games	O
requiring	O
chunky	B-General_Concept
graphics	I-General_Concept
.	O
</s>
<s>
RTG	O
Master	O
supports	O
both	O
graphics	O
cards	O
(	O
with	O
CyberGraphX	O
,	O
Picasso	B-Device
II	I-Device
,	O
Picasso96	O
or	O
EGS	O
compatible	O
drivers	O
)	O
and	O
the	O
Amiga	B-Device
chipset	O
(	O
ECS	O
or	O
AGA	O
)	O
.	O
</s>
