1 files changed, 165 insertions, 0 deletions
diff --git a/pkg/images/tv/display/zzdebug.x b/pkg/images/tv/display/zzdebug.x
new file mode 100644
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+++ b/pkg/images/tv/display/zzdebug.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<imhdr.h>
+
+task	mktest	= t_mktest,
+	sigl2	= t_sigl2,
+	wrimage = t_wrimage,
+	zscale	= t_zscale,
+	rcur	= t_rcur
+
+define	TWOPI	6.23
+
+
+# MKTEST -- Make a test image containing a circularly symetric sinusoid.
+
+procedure t_mktest()
+
+char	imname[SZ_FNAME]
+int	nx, ny
+int	i, j
+real	period, xcen, ycen, radius
+pointer	im, line
+
+int	clgeti()
+real	clgetr()
+pointer	immap(), impl2r()
+
+begin
+	call clgstr ("imname", imname, SZ_FNAME)
+	im = immap (imname, NEW_IMAGE, 0)
+
+	nx = clgeti ("nx")
+	ny = clgeti ("ny")
+	period = clgetr ("period")
+
+	IM_LEN(im,1) = nx
+	IM_LEN(im,2) = ny
+
+	xcen = (nx + 1) / 2.0
+	ycen = (ny + 1) / 2.0
+
+	do j = 1, ny {
+	    line = impl2r (im, j)
+	    do i = 1, nx {
+		radius = sqrt ((i - xcen) ** 2 + (j - ycen) ** 2)
+		Memr[line+i-1] = sin ((radius / period) * TWOPI) * 255.0
+	    }
+	}
+
+	call imunmap (im)
+end
+
+
+# READ -- Benchmark scaled input procedure.
+
+procedure t_sigl2 ()
+
+char	imname[SZ_FNAME]
+pointer	im, si, buf
+int	i, nx, ny, xblk, yblk
+pointer	sigl2_setup(), sigl2s(), immap()
+
+begin
+	call clgstr ("imname", imname, SZ_FNAME)
+	im = immap (imname, READ_ONLY, 0)
+
+	nx = IM_LEN(im,1)
+	ny = IM_LEN(im,2)
+
+	xblk = INDEFI
+	yblk = INDEFI
+	si = sigl2_setup (im, 1.0,real(nx),nx,xblk, 1.0,real(ny),ny,yblk,0)
+
+	do i = 1, ny
+	    buf = sigl2s (si, i)
+
+	call sigl2_free (si)
+	call imunmap (im)
+end
+
+
+# WRIMAGE -- Benchmark image output as used in the display program.
+
+procedure t_wrimage ()
+
+char	imname[SZ_FNAME]
+int	i, ncols, nlines
+pointer	im, buf
+int	clgeti()
+pointer	immap(), imps2s()
+
+begin
+	call clgstr ("imname", imname, SZ_FNAME)
+	im = immap (imname, NEW_IMAGE, 0)
+
+	ncols  = clgeti ("ncols")
+	nlines = clgeti ("nlines")
+
+	IM_LEN(im,1) = ncols
+	IM_LEN(im,2) = nlines
+	IM_PIXTYPE(im) = TY_SHORT
+
+	do i = 1, nlines
+	    buf = imps2s (im, 1, ncols, i, i)
+
+	call imunmap (im)
+end
+
+
+# ZSCALE -- Test the zscale procedure, used to determine the smallest range of
+# greyscale values which preserves the most information in an image.
+
+procedure t_zscale()
+
+char	imname[SZ_FNAME]
+int	sample_size, len_stdline
+real	z1, z2, contrast
+int	clgeti()
+real	clgetr()
+pointer	im, immap()
+
+begin	
+	call clgstr ("imname", imname, SZ_FNAME)
+	im = immap (imname, READ_ONLY, 0)
+
+	sample_size = clgeti ("npix")
+	len_stdline = clgeti ("stdline")
+	contrast    = clgetr ("contrast")
+
+	call zscale (im, z1, z2, contrast, sample_size, len_stdline)
+	call printf ("z1=%g, z2=%g\n")
+	    call pargr (z1)
+	    call pargr (z2)
+end
+
+
+# RCUR -- Try reading the image cursor.
+
+procedure t_rcur()
+
+real	x, y
+int	wcs, key
+int	wci, pause
+char	device[SZ_FNAME]
+char	strval[SZ_LINE]
+
+bool	clgetb()
+int	btoi(), clgeti(), imdrcur()
+
+begin
+	call clgstr ("device", device, SZ_FNAME)
+	wci = clgeti ("wcs")
+	pause = btoi (clgetb ("pause"))
+
+	while (imdrcur (device, x,y,wcs,key,strval,SZ_LINE, wci,pause) != EOF) {
+	    call printf ("%8.2f %8.2f %d %o %s\n")
+		call pargr (x)
+		call pargr (y)
+		call pargi (wcs)
+		call pargi (key)
+		call pargstr (strval)
+	    if (key == 'q')
+		break
+	}
+end