getgde(3G)getgde(3G)NAMEgetgde - gets graphics system description
FORTRAN 77 SPECIFICATION
integer*4 function getgde(inquir)
integer*4 inquir
PARAMETERS
inquiry is a symbolic constant taken from the list below. It
identifies the characteristic about which you want to inquire.
FUNCTION RETURN VALUE
The function returns the value of the requested characteristic, or -1, if
the request is invalid or its value cannot be determined.
DESCRIPTIONgetgde allows you to inquire about characteristics of the currently
selected screen. If the inquired characteristic is about bitplane
configuration, getgde will return a value that indicates the absolute
maximum resources available for the individual characteristic. It is not
guaranteed that the bitplane configuration will reflect these values, as
gconfi reconciles the various requests for resources. You must call
getgco to find out the result of the compromises made by gconfi. You can
call getgde prior to graphics initialization, as its return values are
unaltered by any commands issued after initialization.
The symbolic names of the inquiries and their meanings are specified
below:
Screen Boundary Inquiries
GDXMMA
GDYMMA
Vertical and horizontal size of the screen in millimeters.
GDXPMA
GDYPMA
Vertical and horizontal size of the screen in pixels.
GDZMAX
GDZMIN
Maximum and minimum depth values that can be stored in the z-buffer
of the normal framebuffer.
Framebuffer Depth Inquiries
GDBIAC
Maximum number of bitplanes per color component in the hardware
accumulation buffer, if one exists. Otherwise the number of
bitplanes per color component in the software version of the
accumulation buffer, if it is implemented. Otherwise 0.
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GDBIAH
Maximum number of bitplanes per color component in the hardware
accumulation buffer, if one exists. Otherwise 0.
GDBCUR
Number of bitplanes available in the cursor.
GDBNDA
Maximum number of bitplanes available in the normal framebuffer to
store alpha in double buffered RGB mode.
GDBNDC
Maximum number of bitplanes available in the normal framebuffer to
store the color index in double buffered color map mode.
GDBNDM
Maximum number of bitplanes available in the normal framebuffer to
store the color index in double buffered multimap mode.
GDBNDR
GDBNDG
GDBNDB
Maximum number of bitplanes available in the normal framebuffer to
store red, green, and blue in double buffered RGB mode. If any of
these are 0, then double buffered RGB mode is not available.
GDBNSA
Maximum number of bitplanes available in the normal framebuffer to
store alpha in single buffered RGB mode.
GDBNSC
Maximum number of bitplanes available in the normal framebuffer to
store the color index in single buffered color map mode.
GDBNSM
Maximum number of bitplanes available in the normal framebuffer to
store the color index in single buffered multimap mode.
GDBNSR
GDBNSG
GDBNSB
Maximum number of bitplanes available in the normal framebuffer to
store red, green, and blue in single buffered RGB mode. If any of
these are 0, then single buffered RGB mode is not available.
GDBNZB
Maximum number of useful bitplanes in the z-buffer of the normal
framebuffer, If 0, then there is no z-buffer.
GDBOSC
Maximum number of bitplanes available in the overlay framebuffer to
store the color index in single buffered color map mode.
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GDBPSC
Maximum number of bitplanes available in the popup framebuffer to
store the color index in single buffered color map mode.
GDBIST
Maximum number of bitplanes available in the normal framebuffer for
use as stencil bitplanes. 0 if stenci is not functional.
GDBUSC
Maximum number of bitplanes available in the underlay framebuffer to
store the color index in single buffered color map mode.
Miscellaneous Inquiries
GDAFUN
1 if afunct is functional, 0 if it is not.
GDAFMO
1 if all afunct functions are supported, 0 if they are not.
GDALPH
1 if alpha bitplanes in the normal framebuffer can be allocated as
color map bitplanes in the overlay or underlay framebuffers, 0 if
they cannot.
GDBLEN
1 if blending is supported in all framebuffers that support RGB
mode, 0 otherwise. (See blendf.)
GDBLCO
1 if blendc is supported in all framebuffers that support RGB mode,
0 otherwise.
GDCIFR
1 if fractional interpolation of color indices is supported in all
framebuffers, 0 otherwise. (See colorf.)
GDCLIP
Number of user-defined clipping planes supported. 0 if none are
supported. (See clippl.)
GDXHCI
Color index whose color map entry controls the color of the cross-
hair cursor.
GDMXPS
Number of other graphics pipes available to be video multiplexed
with the graphics pipe associated with the current screen.
GDDBBO
1 if the dial and button box routines are functional, 0 if they are
not. Unlike most of the others, this inquiry is independent of the
currently selected screen. (See dbtext and setdbl.)
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GDDITH
1 if dithering is supported. 0 otherwise.
GDFOGV
1 if fogver supports the per vertex fog modes, namely FGVE, FGVE2,
and FGVL. 0 if it does not.
GDFOGP
1 if fogver supports the per pixel fog modes, namely FGPE, FGVP2,
and FGPL. 0 if it does not.
GDNATV
0 if the IrisGL implementation is layered on OpenGL.
GDFRAM
1 if readso(SRCFRA) is functional, 0 if it is not.
GDLIA2
1 if the ATTEN2 lighting model attribute is functional, 0 if it is
not. (See lmdef.)
GDLISP
1 if spotlights are functional, 0 if they are not. (See lmdef.)
GDLITW
1 if the TWOSID lighting model attribute is functional, 0 if it is
not. (See lmdef.)
GDLSCM
1 if antialiased lines are supported in the normal framebuffer in
color map mode, 0 otherwise. (See linesm.)
GDLSRG
1 if antialiased lines are supported in RGB mode in all framebuffers
that support RGB mode, 0 otherwise. (See linesm.)
GDLOGI
1 if logical operations are supported in all framebuffers, 2 if only
in the normal framebuffer, and 0 otherwise. (See logico.)
GDMULT
1 if the multisample routines are functional, 0 if they are not.
GDNBLI
Maximum number of blinking color map entries on the selected screen.
If the value is non-zero, it will be at least 20. (See blink.)
GDNMMA
Number of smaller color maps available to the user in multimap mode.
On some models, the highest-numbered color map is reserved for use
by the system. (See setmap.)
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GDNSCR
Number of screens available on the system. Unlike most of the
others, this inquiry is independent of the currently selected
screen.
GDNURB
Maximum order of any NURBS surface, NURBS curve, and NURBS trimming
curve.
GDNVPO
Maximum number of vertices in a single polygon. If there is no
limit, then GDNOLI is returned.
GDOVER
1 if overlay and underlay planes are shared, 0 if both can be used
simultaneously.
GDPATS
1 if 64x64 patterns are supported, 0 otherwise. (See defpat.)
GDPSCM
1 if antialiased points are supported in the normal framebuffer in
color map mode, 0 otherwise. (See pntsmo.)
GDPSRG
1 if antialiased points are supported in RGB mode in all
framebuffers that support RGB mode, 0 otherwise. (See pntsmo.)
GDPOMO
1 if polymo is functional, 0 if it is not.
GDPOSM
1 if antialiased polygons are supported in RGB mode in all
framebuffers that support RGB mode, 0 otherwise. (See polysm.)
GDPUPO
1 if the popup bitplanes can be allocated as color map bitplanes in
the overlay or underlay framebuffers, 0 if they cannot.
GDRSRC
1 if readso sources SRCAUT, SRCFRO, and SRCBAC are functional, 0 if
they are not.
GDRSZB
1 if readso(SRCZBU) is functional, 0 if it is not.
GDSCRB
1 if scrbox is functional, 0 if it is not.
GDSTYP
Type of the currently selected screen. Returns GDSTWM if there is
window management on the screen or GDSTNW if there isn't. There can
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be at most one window open on screens of the latter type.
GDSTER
1 if setmon(STRREC) is functional, 0 if it is not.
GDSTIW
1 if per-window stereo is functional, 0 if it is not. (See stereo.)
GDSBLI
GDSBPN
GDSBPO
1 if subpixel positioned lines, points, and polygons (respectively)
are supported in all framebuffers, 0 otherwise. (See subpix.)
GDTEXT
1 if the textport routines are functional, 0 if they are not.
Unlike most of the others, this inquiry is independent of the
currently selected screen. (See textpo.)
GDTXTR
1 if texture mapping routines are functional, 0 if they are not.
(See texdf2.)
GDTX3D
1 if 3D texture mapping routines are functional, 0 if they are not.
(See texdf3.)
GDTXDE
1 if TXDETA is functional, 0 if it is not. (See texdef.)
GDTXLU
1 if texture lookup tables are functional, 0 if they are not. (See
tlutdef.)
GDTXSH
1 if TXSHAR is functional, 0 if it is not. (See texdef.)
GDTIME
Frequency of graphics timer events.
GDTROD
Maximum order of a trimming curve.
GDWSYS
Type of window system running on the machine. Returns GDWS4S if a
windowing system is currently running or GDWSNO if there is no
window system currently running. Unlike most of the others, this
inquiry is independent of the currently selected screen.
GDZDGM
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GDZDPX
1 if routines that render geometry and routines that render pixels
(respectively) will do it into the z-buffer when zdraw is .TRUE., 0
if they do not.
SEE ALSO
gversi, scrnse
NOTES
This routine is available only in immediate mode.
To inquire about the screen on which the current window is displayed, use
the following sequence:
integer*4 svscrn, dummy
...
savescrn = scrnse(getwsc)
val1 = getgde(inquiry1)
val2 = getgde(inquiry2)
...
dummy = scrnse(svscrn)
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