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C***********************************************************************
C Module: gw_subs.f
C
C Copyright (C) 1996 Harold Youngren, Mark Drela
C
C This library is free software; you can redistribute it and/or
C modify it under the terms of the GNU Library General Public
C License as published by the Free Software Foundation; either
C version 2 of the License, or (at your option) any later version.
C
C This library is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
C Library General Public License for more details.
C
C You should have received a copy of the GNU Library General Public
C License along with this library; if not, write to the Free
C Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
C
C Report problems to: guppy@maine.com
C or drela@mit.edu
C***********************************************************************
C
C***********************************************************************
C --- Xplot11 driver for X windows plotting to screen
C
C Version 4.46 11/28/01
C
C Notes: These routines handle the interface to the graphics screen
C window. Not normally called by the user.
C The interface file Xwin.c is needed to link to X11
C***********************************************************************
subroutine gw_setup(scrn_fraction)
C---Sets default size of screen window
C scrn_fraction relative size (0->1) of graphics window to root window
C size defaults to 520x670 if scrn_fraction<0.0 and aspect ratio is set
C by 8.5"x11.0" page size.
C
include 'pltlib.inc'
DATA w1size, w2size / DEFAULT_PAGEHEIGHT, DEFAULT_PAGEWIDTH /
C
G_SCRNFRAC = abs(scrn_fraction)
G_SCRNFRAC = MIN(1.0,G_SCRNFRAC)
IF(scrn_fraction .EQ. 0.0) G_SCRNFRAC = DEFAULT_SCREENFRACTION
C
C---set default window size
if(scrn_fraction .GE. 0.0) then
X_PAGE = w1size
Y_PAGE = w2size
I_PAGETYPE = Page_Landscape
else
X_PAGE = w2size
Y_PAGE = w1size
I_PAGETYPE = Page_Portrait
endif
C
C---window size in absolute units (pseudo-inches)
X_WIND = X_PAGE
Y_WIND = Y_PAGE
C
C---location of upper left window corner
GX_LOC = 0
GY_LOC = 0
C
C---location of plot origin on window
GX_ORG = 0
GY_ORG = 0
C
return
end
subroutine gw_init
C---Initializes graphics screen plotting and global plot variables
include 'pltlib.inc'
C
ixsiz = GX_SIZ
iysiz = GY_SIZ
ixstart = GX_LOC
iystart = GY_LOC
scrnfrac = MIN(1.0,G_SCRNFRAC)
A_RATIO = Y_WIND/X_WIND
C
if(.NOT.LGW_OPEN) then
C---Open display and window if not already open
call gwxopen(iwidth,iheight,idepth)
G_WIDTH = iwidth
G_HEIGHT = iheight
G_DEPTH = idepth
C---Adjust window size if fraction of root window is specified
if(scrnfrac.GT.0.0) then
ix = ifix(scrnfrac*float(G_WIDTH))
iy = ifix(scrnfrac*float(G_HEIGHT))
if(ix*A_RATIO.LT.iy) then
ixsiz = ix
iysiz = ifix(A_RATIO*float(ix))
else
iysiz = iy
ixsiz = ifix(float(iy)/A_RATIO)
endif
endif
ixsiz = MIN(ixsiz,G_WIDTH)
iysiz = MIN(iysiz,G_HEIGHT)
call gwxwinopen(ixstart,iystart,ixsiz,iysiz)
C---Update flags for reference
LGW_OPEN = .TRUE.
C---Graphics window color is not used if less than 4 bits (16 colors)
C are available
LGW_COLOR = (G_DEPTH.gt.4)
if(.NOT.LGW_COLOR) then
write(*,*) 'Warning: color depth < 4 bits, color not used...'
endif
C
C---initial cursor warp will be to middle of window
GX_SIZ = ixsiz
GY_SIZ = iysiz
GX_CRS = GX_ORG + GX_SIZ/2
GY_CRS = GY_ORG + GY_SIZ/2
C
else
C
C---Window already open, resize if specified
if(LGW_RESIZE) then
C
ixorig = ixsiz
iyorig = iysiz
C---Resize window if new fractional size of root window is specified
if(scrnfrac.GT.0.0) then
ix = ifix(scrnfrac*float(G_WIDTH))
iy = ifix(scrnfrac*float(G_HEIGHT))
if(ix*A_RATIO.LT.iy) then
ixsiz = ix
iysiz = ifix(A_RATIO*float(ix))
else
iysiz = iy
ixsiz = ifix(float(iy)/A_RATIO)
endif
else
write(*,*) 'Warning: scrnfrac=0 specified, ignoring...'
stop
endif
ixsiz = MIN(ixsiz,G_WIDTH)
iysiz = MIN(iysiz,G_HEIGHT)
call gwxresize(ixsiz,iysiz)
call gwxstatus(ixstart,iystart,ixsz,iysz)
if(ixsz.NE.ixsiz .OR. iysz.NE.iysiz) then
write(*,*) 'Window resize fails, using old window size'
ixsiz = ixorig
iysiz = iyorig
endif
C---Update flags for reference
LGW_RESIZE = .FALSE.
LGW_CHANGED = .TRUE.
C
else
C
C...Graphics window can be moved & resized, so reset position & size parameters
call gwxstatus(ixstart,iystart,ixsiz,iysiz)
LGW_CHANGED = (ixsiz.ne.GX_SIZ .or. iysiz.ne.GY_SIZ)
C
endif
C
call gwxclear
endif
C
C---Update size and origin
GX_LOC = ixstart
GY_LOC = iystart
GX_SIZ = ixsiz
GY_SIZ = iysiz
C
C---initial cursor warp will be to middle of window
cc GX_CRS = GX_ORG + GX_SIZ/2
cc GY_CRS = GY_ORG + GY_SIZ/2
C
C...Set new scale so that each window dimension is as big as possible
C but no bigger than X_PAGE or Y_PAGE.
G_SCALE = max( float(GX_SIZ-1)/X_PAGE,
& float(GY_SIZ-1)/Y_PAGE )
C
C...New window dimensions
X_WIND = float(GX_SIZ-1)/G_SCALE
Y_WIND = float(GY_SIZ-1)/G_SCALE
C
return
end
subroutine gw_line(X1,Y1,X2,Y2)
C---Plots line segment to screen,
C specified in absolute coordinates from X1,Y1 to X2,Y2
include 'pltlib.inc'
C
if(LGW_OPEN) then
C...reverse Y axis for X11 plotting
ix1 = GX_ORG + ifix(G_SCALE*X1)
ix2 = GX_ORG + ifix(G_SCALE*X2)
iy1 = GY_SIZ - (GY_ORG + ifix(G_SCALE*Y1)) - 1
iy2 = GY_SIZ - (GY_ORG + ifix(G_SCALE*Y2)) - 1
call gwxline(ix1,iy1,ix2,iy2)
endif
C
return
end
subroutine gw_curs(X,Y,kchar)
C---Gets location of mouse in graphics window in
C---absolute coordinates. Returns position when mouse button is pressed
C---or keyboard key is pressed.
C
include 'pltlib.inc'
C
if(LGW_OPEN) then
C
C------ set previous cursor position (if any) for warping destination
ix = GX_ORG + GX_CRS
iy = GY_SIZ - (GY_ORG + GY_CRS)
C
call gwxcurs(ix,iy,kchar)
GX_CRS = ix - GX_ORG
GY_CRS = GY_SIZ - iy - GY_ORG
C
X = float(GX_CRS)/G_SCALE
Y = float(GY_CRS)/G_SCALE
C
endif
return
end
subroutine gw_cursc(X,Y,ibtn)
C---Gets current location of mouse in graphics window in
C---absolute coordinates. Returns current position while mouse button
C---is pressed, with ibtn=1. When mouse button is released ibtn=0.
C---
C---
include 'pltlib.inc'
integer ibtn
C
if(LGW_OPEN) then
C
C------ set previous cursor position (if any) for warping destination
ix = GX_ORG + GX_CRS
iy = GY_SIZ - (GY_ORG + GY_CRS)
C
call gwxcursc(ix,iy,ibtn)
GX_CRS = ix - GX_ORG
GY_CRS = GY_SIZ - iy - GY_ORG
C
X = float(GX_CRS)/G_SCALE
Y = float(GY_CRS)/G_SCALE
C
endif
return
end
subroutine gw_revflag
C---Gets reverse video flag from users environment settings
include 'pltlib.inc'
C
call gwxrevflag(irev)
LGW_REVVIDEO = (irev.ne.0)
C
return
end
subroutine gw_endplot
C---Flushes current graphics to window and returns control to
C graphics window temporarily
include 'pltlib.inc'
C
if(LGW_OPEN) then
call gwxflush
endif
C
return
end
subroutine gw_pen(ipen)
C...Sets pen width for screen display
include 'pltlib.inc'
dimension ipmap(5)
c data ipmap / 0, 0, 2, 3, 4 / <- too wide!
data ipmap / 0, 0, 1, 1, 2 /
C
ip = max(1,ipen)
ip = min(5,ip)
if(LGW_OPEN) then
call gwxpen(ipmap(ip))
endif
C
return
end
subroutine gw_linepattern(ipat)
C...Sets pen width for screen display
include 'pltlib.inc'
C
if(LGW_OPEN) call gwxdash(ipat)
return
end
subroutine gw_flush
C...Flushes out buffered plotting calls to display
include 'pltlib.inc'
C
if(LGW_OPEN) call gwxflush
return
end
subroutine gw_drawtoscreen
C...Sets graphics destination to screen
include 'pltlib.inc'
C
if(LGW_OPEN) call gwxdrawtowindow
return
end
subroutine gw_drawtobuffer
C...Sets graphics destination to background buffer
include 'pltlib.inc'
C
if(LGW_OPEN) call gwxdrawtobuffer
return
end
subroutine gw_showbuffer
C...Displays graphics drawn into background buffer on screen
C This does not change the current destination for drawing commands
include 'pltlib.inc'
C
if(LGW_OPEN) call gwxdisplaybuffer
return
end
subroutine gw_clear
C...Erases graphics display
include 'pltlib.inc'
C
if(LGW_OPEN) call gwxclear
return
end
subroutine gw_setsize(nx,ny)
C...Resizes X-Window X,Y size to nx,ny in pixels
include 'pltlib.inc'
C
if(nx.LE.10) then
write(*,*) 'No Resize: Window size too small: ',nx,ny
return
endif
C
C...Get current window parameters if display is open
if(LGW_OPEN) then
call gwxstatus(ixstart,iystart,ixsiz,iysiz)
LGW_CHANGED = (ixsiz.ne.GX_SIZ .or. iysiz.ne.GY_SIZ)
GX_LOC = ixstart
GY_LOC = iystart
GX_SIZ = ixsiz
GY_SIZ = iysiz
endif
C
C...Resize and replot the window contents
if(LGW_OPEN) then
call gwxresize(nx,ny)
call gwxstatus(ixstart,iystart,ixsz,iysz)
if(ixsz.NE.ixsiz .OR. iysz.NE.iysiz) then
write(*,*) 'Window resize fails, using old window size'
ixsz = ixsiz
iysz = iysiz
endif
C---Update flags and size for reference
LGW_RESIZE = .FALSE.
LGW_CHANGED = .TRUE.
GX_SIZ = ixsz
GY_SIZ = iysz
C
C---initial cursor warp will be to middle of window
GX_CRS = GX_ORG + GX_SIZ/2
GY_CRS = GY_ORG + GY_SIZ/2
C---Set new scale so that each window dimension is as big as possible
C but no bigger than X_PAGE or Y_PAGE.
G_SCALE = max( float(GX_SIZ-1)/X_PAGE,
& float(GY_SIZ-1)/Y_PAGE )
C---New window dimensions
X_WIND = float(GX_SIZ-1)/G_SCALE
Y_WIND = float(GY_SIZ-1)/G_SCALE
C---refresh the newly sized window
call REPLOT(1)
endif
return
end
subroutine gw_getsize(nx,ny,ppi)
C...Returns X Window X,Y size in pixels,
C and plotting scale in pixels/(absolute coordinate)
include 'pltlib.inc'
C
if(LGW_OPEN) then
nx = GX_SIZ
ny = GY_SIZ
ppi = G_SCALE
endif
return
end
subroutine gw_close
C---Closes graphics window
include 'pltlib.inc'
C
if(LGW_OPEN) then
call gwxclose
LGW_OPEN = .FALSE.
endif
return
end
subroutine gw_cname2rgb(colorname,ired,igrn,iblu)
C...Determines RGB color components of color defined the color name
C using the X window color database.
C
C colorname = name of color (must be in X windows rgb.txt file)
C
C The returned color components are
C ired = 0-255 red component (-1 for no color)
C igrn = 0-255 green component
C iblu = 0-255 blue component
C
include 'pltlib.inc'
character colorname*(*), cname*80
ired = -1
igrn = 0
iblu = 0
ccc nc = len(colorname)
cname = colorname
call g_strip(cname,nc)
if(LGW_OPEN) then
call gwxcolorname2rgb(ired,igrn,iblu,nc,cname)
endif
return
end
subroutine gw_allocrgbcolor(ired,igrn,iblu,icolorindex)
C...Allocates plotting color as defined by RGB components
C The component colors are
C ired = 0-255 red component
C igrn = 0-255 green component
C iblu = 0-255 blue component
C
C icolorindex = returned color index of allocated color in window colormap
C
include 'pltlib.inc'
ic = -1
if(LGW_OPEN .AND. LGW_COLOR) then
ir = ired
ig = igrn
ib = iblu
call gwxallocrgbcolor(ir,ig,ib,ic)
icolorindex = ic
endif
return
end
subroutine gw_color(icolor)
C...Sets foreground plotting color
C The colors are defined by the colormap
C
C The color in the colormap table and colorindex go from 0 -> N_COLOR
C
include 'pltlib.inc'
c
if(LGW_OPEN .AND. LGW_COLOR) then
c
icol = mod(icolor,N_COLOR+1)
if(icolor.le.0 .OR. icolor.gt.N_COLOR) then
write(*,*) '*** gw_color - color index out of bounds ',icolor
return
endif
C
C...Reverse white and black only in video window if LGW_REVVIDEO is set
if(LGW_REVVIDEO) then
if(icolor.eq.2) icol = 1
if(icolor.eq.1) icol = 2
endif
C
C...Check colorindex<0 for this color, if so this is an unallocated color
ic = G_COLOR_CINDEX(icol)
C
C...If color is unallocated, allocate it using the RGB components
if (ic.lt.0) then
irgb = COLOR_RGB(icol)
irg = irgb/256
ired = irg/256
igrn = irg - 256*ired
iblu = irgb - 256*irg
call gw_allocrgbcolor(ired,igrn,iblu,ic)
C
C...This gives the colorindex in the screen colormap (or -1 for no allocation)
if(ic.ge.0) G_COLOR_CINDEX(icol) = ic
endif
C
C...Now, if colorindex is valid, set the color
if(ic.ge.0) call gwxsetcolor(ic)
c
endif
return
end
subroutine gw_bgcolor(icolor)
C...Sets background plotting color
C The colors are defined by the colormap
C
C The color in the colormap table and colorindex go from 0 -> N_COLOR
C
include 'pltlib.inc'
c
if(LGW_OPEN .AND. LGW_COLOR) then
c
icol = mod(icolor,N_COLOR+1)
if(icolor.le.0 .OR. icolor.gt.N_COLOR) then
write(*,*) '*** gw_bgcolor - color index out of bounds ',
& icolor
return
endif
C
C...Reverse white and black only in video window if LGW_REVVIDEO is set
if(LGW_REVVIDEO) then
if(icolor.eq.2) icol = 1
if(icolor.eq.1) icol = 2
endif
C
C...Check colorindex<0 for this color, if so this is an unallocated color
ic = G_COLOR_CINDEX(icol)
C
C...If color is unallocated, allocate it using the RGB components
if (ic.lt.0) then
irgb = COLOR_RGB(icol)
irg = irgb/256
ired = irg/256
igrn = irg - 256*ired
iblu = irgb - 256*irg
call gw_allocrgbcolor(ired,igrn,iblu,ic)
C
C...This gives the colorindex in the screen colormap (or -1 for no allocation)
if(ic.ge.0) G_COLOR_CINDEX(icol) = ic
endif
C
C...Now, if colorindex is valid, set the color
if(ic.ge.0) call gwxsetbgcolor(ic)
c
endif
return
end
subroutine gw_newcmap
C...Sets up new colormap, old colormap is flushed
include 'pltlib.inc'
if(LGW_OPEN .AND. LGW_COLOR) then
do i = 1, N_COLOR
ic = G_COLOR_CINDEX(i)
if(ic.gt.0) call gwxfreecolor(ic)
end do
endif
return
end
subroutine gw_polyline(X,Y,n,ifill)
C...Plots polyline (optionally filled) to screen in foreground color
C X,Y polyline X,Y absolute coordinates
C n number of X,Y points
C ifill fill flag, 0 for no fill, 1 for filled polyline
C
include 'pltlib.inc'
dimension X(n), Y(n), ix(MaxPolyLine), iy(MaxPolyLine)
C
if(n.GT.MaxPolyLine) then
write(*,*) 'gw_polyline: array overflow. Increase MaxPolyline.'
return
endif
c
if(n.LE.1) return
if(LGW_OPEN) then
C...reverse Y axis for X11 plotting
do i = 1, n
ix(i) = GX_ORG + ifix(G_SCALE*X(i))
iy(i) = GY_SIZ - (GY_ORG + ifix(G_SCALE*Y(i))) - 1
end do
if(ifill.EQ.0) then
call gwxlinez(ix,iy,n)
else
call gwxpoly(ix,iy,n)
endif
endif
return
end
subroutine g_strip(strng,n)
character strng*(*)
c
nc = len(strng)
n = nc
if (n.le.1) return
c
c---- Strips leading blanks off string
if(strng(1:1).EQ.' ') then
c
c---- find first non-blank character
do i=2, nc
if(strng(i:i).NE.' ') go to 10
end do
go to 20
10 ioff = i
C
C---- shift STRNG so first character is non-blank
strng(1:nc-ioff) = strng(ioff:nc)
C---- pad tail of STRNG with blanks
strng(nc-ioff+1:nc) = ' '
c
endif
c
c---- find the index of the last non-blank charater in NAME
20 do n=nc, 1, -1
if(strng(n:n).NE.' ') go to 40
end do
40 return
end
|
