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*******************************************************************************
* Support routines for libgd labels *
*******************************************************************************
* Version 3.0
*
* PCC Apr 2010 - Initial version (some code came from r3dtops.f)
* PCC May 2010 - Allow for LABELSTRING to have null pointers
* EAM Dec 2010 - Fix antialiasing scales
*******************************************************************************
*
* These routines are called from render.f to handle object types 10, 11 and 12.
* The parsed information will be passed onto the mylabel_() function in local.c
*
* The "libgd file" describes a canvas with the same dimension in pixels as
* the image created by render. The libgd canvas can be composited on top
* of the rendered image to produce a labeled figure.
*
* Object types 10 and 11 are used for specifying labels.
* Label object types are
* - type 10: Font_Name size alignment
* - type 11: XYZ RGB on first line
* label (ascii characters enclosed in quotes) on second line
* Object type 12 is reserved to go with this, as I have a nagging
* suspicion more information may turn out to be necessary.
*
*******************************************************************************
SUBROUTINE LOPEN( FILENAME )
CHARACTER*132 FILENAME
RETURN
END
SUBROUTINE LCLOSE( )
RETURN
END
SUBROUTINE LSETUP( PSCALE, BKGND, TITLE )
REAL PSCALE
REAL BKGND(3)
CHARACTER*80 TITLE
COMMON /OPTIONS/ FONTSCALE, GAMMA, ZOOM, NSCHEME, SHADOWFLAG, XBG,
& NAX, NAY, OTMODE, QUALITY, INVERT, LFLAG
REAL FONTSCALE, GAMMA, ZOOM
INTEGER NSCHEME, SHADOWFLAG, XBG
INTEGER*4 NAX, NAY, OTMODE, QUALITY
LOGICAL*2 INVERT, LFLAG
C Might as well always handle labels?
C LFLAG = .TRUE.
RETURN
END
*******************************************************************************
SUBROUTINE LINP( INPUT, INTYPE, MATCOL, RGBMAT )
IMPLICIT NONE
INTEGER I, J, LEN
INTEGER INPUT, INTYPE
LOGICAL MATCOL
REAL RGBMAT(3)
REAL AASCALE
*
* Input transformation
COMMON /MATRICES/ XCENT, YCENT, SCALE, EYEPOS, SXCENT, SYCENT,
& TMAT, TINV, TINVT, SROT, SRTINV, SRTINVT
& ,RAFTER, TAFTER
REAL XCENT, YCENT, SCALE, SXCENT, SYCENT
* Transformation matrix, inverse of transpose, and transposed inverse
REAL TMAT(4,4), TINV(4,4), TINVT(4,4)
* Shortest rotation from light source to +z axis
REAL SROT(4,4), SRTINV(4,4), SRTINVT(4,4)
* Post-hoc transformation on top of original TMAT
REAL RAFTER(4,4), TAFTER(3)
EXTERNAL DET
REAL DET
* Distance (in +z) of viewing eye
REAL EYEPOS
*
EXTERNAL PERSP
REAL PERSP, PFAC
*
* Stuff for labels
CHARACTER*80 FONTNAME, FONTALIGN
CHARACTER*128 LABELSTRING
SAVE FONTNAME
SAVE LABELSTRING
INTEGER MAXLABLEN
PARAMETER (MAXLABLEN = 128)
INTEGER IALIGN
SAVE IALIGN
INTEGER FONT, LABEL
PARAMETER (FONT = 10, LABEL = 11)
REAL XA, YA, ZA, RED, GRN, BLU
REAL FONTSIZE
SAVE FONTSIZE
*
* Keep track of actual coordinate limits
COMMON /NICETIES/ TRULIM, ZLIM, FRONTCLIP, BACKCLIP, ISOLATION
REAL TRULIM(3,2), ZLIM(2), FRONTCLIP, BACKCLIP
INTEGER ISOLATION
*
* Command line options (Aug 1999) NB: nax,nay,quality MUST be integer*2
COMMON /OPTIONS/ FONTSCALE, GAMMA, ZOOM, NSCHEME, SHADOWFLAG, XBG,
& NAX, NAY, OTMODE, QUALITY, INVERT, LFLAG
REAL FONTSCALE, GAMMA, ZOOM
INTEGER NSCHEME, SHADOWFLAG, XBG
INTEGER*4 NAX, NAY, OTMODE, QUALITY
LOGICAL*2 INVERT, LFLAG
*
* Copy of NOISE for ASSERT to see
COMMON /ASSCOM/ NOISE, VERBOSE
INTEGER NOISE
LOGICAL VERBOSE
c*****DEFAULTS:
c FONTSCALE = 1.0
c
c Read in next object
IF (INTYPE .EQ. FONT) THEN
READ (INPUT,*,END=50) FONTNAME, FONTSIZE, FONTALIGN
IF (FONTALIGN(1:1).EQ.'C') THEN
IALIGN=1
ELSE IF (FONTALIGN(1:1).EQ.'R') THEN
IALIGN=2
ELSE IF (FONTALIGN(1:1).EQ.'O') THEN
IALIGN=3
ELSE
IALIGN=0
ENDIF
c
* TODO: The following can probably be removed
c len = 0
c DO i=1,80
c if (fontname(i:i).ne.' ') len = i
c enddo
ELSE IF (INTYPE .EQ. LABEL ) THEN
READ (INPUT,*,END=50) XA, YA, ZA, RED, GRN, BLU
IF (MATCOL) THEN
RED = RGBMAT(1)
GRN = RGBMAT(2)
BLU = RGBMAT(3)
ENDIF
c
c Here is where Perl would shine
c
READ (INPUT,'(A)',END=50) LABELSTRING
len = len_trim(LABELSTRING)
c
c Isolated objects not transformed by TMAT, but still subject to inversion.
IF (ISOLATION.GT.0) THEN
IF (INVERT) YA = -YA
if (isolation.eq.2) then
if (xcent.gt.ycent) xa = xa * xcent / ycent
if (xcent.lt.ycent) ya = ya * ycent / xcent
endif
ELSE
c modify the input, as it were
IF (IALIGN.NE.3) THEN
CALL TRANSF (XA,YA,ZA, TMAT)
c YA = -YA
ENDIF
ENDIF
c perspective
IF (EYEPOS.GT.0) THEN
PFAC = PERSP(ZA)
ELSE
PFAC = 1.0
ENDIF
c
AASCALE = 1.0
IF (NSCHEME.EQ.2) AASCALE = 0.5
IF (NSCHEME.EQ.3) AASCALE = 2./3.
IF (NSCHEME.EQ.4) AASCALE = 2./3.
IF (IALIGN.EQ.3) THEN
XA = XA * SCALE
YA = YA * SCALE
ELSE IF (ISOLATION.GT.0) THEN
XA = XA * SCALE + XCENT
YA = YA * SCALE + YCENT
ELSE
c scale and translate to pixel space
XA = XA * PFAC * SCALE + XCENT
YA = YA * PFAC * SCALE + YCENT
ZA = ZA
ENDIF
c allow for the antialiasing
XA = XA * AASCALE
YA = YA * AASCALE
ZA = ZA * AASCALE
c
c IF (ZA * SCALE .LT. BACKCLIP .OR. ZA * SCALE .GT. FRONTCLIP) RETURN
CALL CHKRGB( RED, GRN, BLU, 'invalid label color')
c WRITE (0,*) 'COLOR VALUES = ', RED, GRN, BLU
RED = SQRT(RED)
GRN = SQRT(GRN)
BLU = SQRT(BLU)
c
c
C =============================================================================
C Ready to pass on information to libgd via local.c
c
CALL ADDLABEL(FONTNAME//CHAR(0), FONTSIZE, FONTSCALE, IALIGN,
& XA,YA,ZA, RED,GRN,BLU, LABELSTRING//CHAR(0))
c
C =============================================================================
c
c
800 FORMAT(A,'-x,y,z: ',3F10.3)
801 FORMAT(A,4F10.1)
ENDIF
RETURN
c
c Error handling
c
50 WRITE (NOISE,*) '>>> Unrecognized label command'
RETURN
END
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