Initial commit

1 files changed, 57 insertions, 0 deletions

diff --git a/sys/gio/cursor/grctext.x b/sys/gio/cursor/grctext.x
new file mode 100644
index 00000000..5bee9b34
--- /dev/null
+++ b/sys/gio/cursor/grctext.x
@@ -0,0 +1,57 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<gset.h>
+include	<gki.h>
+include	<gio.h>
+include	"gtr.h"
+include "grc.h"
+
+# GRC_TEXT -- Draw a text string.  The instruction is encoded and appended to
+# the frame buffer and GIOTR is called to draw the new instructions.
+
+procedure grc_text (stream, x, y, text)
+
+int	stream			# graphics stream
+real	x, y			# NDC coordinates of ll corner of first char
+char	text[ARB]		# text string
+
+pointer	tr, op, last_op
+int	fd, save1, save2, nwords
+int	stropen(), strlen()
+pointer	gtr_init(), gtr_writep()
+errchk	gtr_init, stropen, gki_redir
+
+begin
+	tr = gtr_init (stream)
+
+	# Allocate space in the frame buffer for the text set attribute
+	# and text drawing instructions.  Set the last op for undo to undo
+	# the line.  This is also set by writep, hence we must wait to set
+	# TR_LASTOP until after the call to writep.
+
+	last_op = TR_OP(tr)
+	nwords = GKI_TXSET_LEN + GKI_TEXT_LEN + strlen(text)
+	op = gtr_writep (stream, nwords)
+	TR_LASTOP(tr) = last_op
+
+	# Open the frame buffer as a file and redirect the graphics stream
+	# output into the buffer.
+
+	fd = stropen (Mems[op], nwords, NEW_FILE) 
+	call gki_redir (stream, fd, save1, save2)
+
+	# Output the set text attribute instruction and the text drawing
+	# instruction.
+
+	call gki_txset (stream, TR_TXAP(tr))
+	call gki_text (stream, nint(x*GKI_MAXNDC), nint(y*GKI_MAXNDC), text)
+
+	# Restore the normal output for the stream.
+	call gki_redir (stream, 0, save1, save2)
+	call close (fd)
+
+	# Call giotr to send the new instructions off to the kernel, optionally
+	# applying the workstation transformation in the process.
+
+	call giotr (stream)
+end