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authorLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
committerLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
commit9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch)
tree0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/PIL/PSDraw.py
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+#
+# The Python Imaging Library
+# $Id$
+#
+# Simple PostScript graphics interface
+#
+# History:
+# 1996-04-20 fl Created
+# 1999-01-10 fl Added gsave/grestore to image method
+# 2005-05-04 fl Fixed floating point issue in image (from Eric Etheridge)
+#
+# Copyright (c) 1997-2005 by Secret Labs AB. All rights reserved.
+# Copyright (c) 1996 by Fredrik Lundh.
+#
+# See the README file for information on usage and redistribution.
+#
+
+import sys
+
+from . import EpsImagePlugin
+
+##
+# Simple PostScript graphics interface.
+
+
+class PSDraw:
+ """
+ Sets up printing to the given file. If ``fp`` is omitted,
+ ``sys.stdout.buffer`` or ``sys.stdout`` is assumed.
+ """
+
+ def __init__(self, fp=None):
+ if not fp:
+ try:
+ fp = sys.stdout.buffer
+ except AttributeError:
+ fp = sys.stdout
+ self.fp = fp
+
+ def begin_document(self, id=None):
+ """Set up printing of a document. (Write PostScript DSC header.)"""
+ # FIXME: incomplete
+ self.fp.write(
+ b"%!PS-Adobe-3.0\n"
+ b"save\n"
+ b"/showpage { } def\n"
+ b"%%EndComments\n"
+ b"%%BeginDocument\n"
+ )
+ # self.fp.write(ERROR_PS) # debugging!
+ self.fp.write(EDROFF_PS)
+ self.fp.write(VDI_PS)
+ self.fp.write(b"%%EndProlog\n")
+ self.isofont = {}
+
+ def end_document(self):
+ """Ends printing. (Write PostScript DSC footer.)"""
+ self.fp.write(b"%%EndDocument\nrestore showpage\n%%End\n")
+ if hasattr(self.fp, "flush"):
+ self.fp.flush()
+
+ def setfont(self, font, size):
+ """
+ Selects which font to use.
+
+ :param font: A PostScript font name
+ :param size: Size in points.
+ """
+ font = bytes(font, "UTF-8")
+ if font not in self.isofont:
+ # reencode font
+ self.fp.write(b"/PSDraw-%s ISOLatin1Encoding /%s E\n" % (font, font))
+ self.isofont[font] = 1
+ # rough
+ self.fp.write(b"/F0 %d /PSDraw-%s F\n" % (size, font))
+
+ def line(self, xy0, xy1):
+ """
+ Draws a line between the two points. Coordinates are given in
+ PostScript point coordinates (72 points per inch, (0, 0) is the lower
+ left corner of the page).
+ """
+ self.fp.write(b"%d %d %d %d Vl\n" % (*xy0, *xy1))
+
+ def rectangle(self, box):
+ """
+ Draws a rectangle.
+
+ :param box: A tuple of four integers, specifying left, bottom, width and
+ height.
+ """
+ self.fp.write(b"%d %d M 0 %d %d Vr\n" % box)
+
+ def text(self, xy, text):
+ """
+ Draws text at the given position. You must use
+ :py:meth:`~PIL.PSDraw.PSDraw.setfont` before calling this method.
+ """
+ text = bytes(text, "UTF-8")
+ text = b"\\(".join(text.split(b"("))
+ text = b"\\)".join(text.split(b")"))
+ xy += (text,)
+ self.fp.write(b"%d %d M (%s) S\n" % xy)
+
+ def image(self, box, im, dpi=None):
+ """Draw a PIL image, centered in the given box."""
+ # default resolution depends on mode
+ if not dpi:
+ if im.mode == "1":
+ dpi = 200 # fax
+ else:
+ dpi = 100 # greyscale
+ # image size (on paper)
+ x = im.size[0] * 72 / dpi
+ y = im.size[1] * 72 / dpi
+ # max allowed size
+ xmax = float(box[2] - box[0])
+ ymax = float(box[3] - box[1])
+ if x > xmax:
+ y = y * xmax / x
+ x = xmax
+ if y > ymax:
+ x = x * ymax / y
+ y = ymax
+ dx = (xmax - x) / 2 + box[0]
+ dy = (ymax - y) / 2 + box[1]
+ self.fp.write(b"gsave\n%f %f translate\n" % (dx, dy))
+ if (x, y) != im.size:
+ # EpsImagePlugin._save prints the image at (0,0,xsize,ysize)
+ sx = x / im.size[0]
+ sy = y / im.size[1]
+ self.fp.write(b"%f %f scale\n" % (sx, sy))
+ EpsImagePlugin._save(im, self.fp, None, 0)
+ self.fp.write(b"\ngrestore\n")
+
+
+# --------------------------------------------------------------------
+# PostScript driver
+
+#
+# EDROFF.PS -- PostScript driver for Edroff 2
+#
+# History:
+# 94-01-25 fl: created (edroff 2.04)
+#
+# Copyright (c) Fredrik Lundh 1994.
+#
+
+
+EDROFF_PS = b"""\
+/S { show } bind def
+/P { moveto show } bind def
+/M { moveto } bind def
+/X { 0 rmoveto } bind def
+/Y { 0 exch rmoveto } bind def
+/E { findfont
+ dup maxlength dict begin
+ {
+ 1 index /FID ne { def } { pop pop } ifelse
+ } forall
+ /Encoding exch def
+ dup /FontName exch def
+ currentdict end definefont pop
+} bind def
+/F { findfont exch scalefont dup setfont
+ [ exch /setfont cvx ] cvx bind def
+} bind def
+"""
+
+#
+# VDI.PS -- PostScript driver for VDI meta commands
+#
+# History:
+# 94-01-25 fl: created (edroff 2.04)
+#
+# Copyright (c) Fredrik Lundh 1994.
+#
+
+VDI_PS = b"""\
+/Vm { moveto } bind def
+/Va { newpath arcn stroke } bind def
+/Vl { moveto lineto stroke } bind def
+/Vc { newpath 0 360 arc closepath } bind def
+/Vr { exch dup 0 rlineto
+ exch dup 0 exch rlineto
+ exch neg 0 rlineto
+ 0 exch neg rlineto
+ setgray fill } bind def
+/Tm matrix def
+/Ve { Tm currentmatrix pop
+ translate scale newpath 0 0 .5 0 360 arc closepath
+ Tm setmatrix
+} bind def
+/Vf { currentgray exch setgray fill setgray } bind def
+"""
+
+#
+# ERROR.PS -- Error handler
+#
+# History:
+# 89-11-21 fl: created (pslist 1.10)
+#
+
+ERROR_PS = b"""\
+/landscape false def
+/errorBUF 200 string def
+/errorNL { currentpoint 10 sub exch pop 72 exch moveto } def
+errordict begin /handleerror {
+ initmatrix /Courier findfont 10 scalefont setfont
+ newpath 72 720 moveto $error begin /newerror false def
+ (PostScript Error) show errorNL errorNL
+ (Error: ) show
+ /errorname load errorBUF cvs show errorNL errorNL
+ (Command: ) show
+ /command load dup type /stringtype ne { errorBUF cvs } if show
+ errorNL errorNL
+ (VMstatus: ) show
+ vmstatus errorBUF cvs show ( bytes available, ) show
+ errorBUF cvs show ( bytes used at level ) show
+ errorBUF cvs show errorNL errorNL
+ (Operand stargck: ) show errorNL /ostargck load {
+ dup type /stringtype ne { errorBUF cvs } if 72 0 rmoveto show errorNL
+ } forall errorNL
+ (Execution stargck: ) show errorNL /estargck load {
+ dup type /stringtype ne { errorBUF cvs } if 72 0 rmoveto show errorNL
+ } forall
+ end showpage
+} def end
+"""