/usr/lib/python2.7/dist-packages/reportlab/graphics/renderPS.py is in python-reportlab 3.1.8-3+deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 | #Copyright ReportLab Europe Ltd. 2000-2012
#see license.txt for license details
#history http://www.reportlab.co.uk/cgi-bin/viewcvs.cgi/public/reportlab/trunk/reportlab/graphics/renderPS.py
__version__=''' $Id$ '''
__doc__="""Render drawing objects in Postscript"""
from reportlab.pdfbase.pdfmetrics import getFont, stringWidth, unicode2T1 # for font info
from reportlab.lib.utils import getBytesIO, getStringIO, asBytes, char2int, rawBytes, asNative, isUnicode
from reportlab.lib.rl_accel import fp_str
from reportlab.lib.colors import black
from reportlab.graphics.renderbase import Renderer, StateTracker, getStateDelta, renderScaledDrawing
from reportlab.graphics.shapes import STATE_DEFAULTS
import math
from operator import getitem
from reportlab import rl_config
_ESCAPEDICT={}
for c in xrange(256):
if c<32 or c>=127:
_ESCAPEDICT[c]= '\\%03o' % c
elif c in (ord('\\'),ord('('),ord(')')):
_ESCAPEDICT[c] = '\\'+chr(c)
else:
_ESCAPEDICT[c] = chr(c)
del c
def _escape_and_limit(s):
s = asBytes(s)
R = []
aR = R.append
n = 0
for c in s:
c = _ESCAPEDICT[char2int(c)]
aR(c)
n += len(c)
if n>=200:
n = 0
aR('\\\n')
return ''.join(R)
# we need to create encoding vectors for each font we use, or they will
# come out in Adobe's old StandardEncoding, which NOBODY uses.
PS_WinAnsiEncoding="""
/RE { %def
findfont begin
currentdict dup length dict begin
{ %forall
1 index /FID ne { def } { pop pop } ifelse
} forall
/FontName exch def dup length 0 ne { %if
/Encoding Encoding 256 array copy def
0 exch { %forall
dup type /nametype eq { %ifelse
Encoding 2 index 2 index put
pop 1 add
}{ %else
exch pop
} ifelse
} forall
} if pop
currentdict dup end end
/FontName get exch definefont pop
} bind def
/WinAnsiEncoding [
39/quotesingle 96/grave 128/euro 130/quotesinglbase/florin/quotedblbase
/ellipsis/dagger/daggerdbl/circumflex/perthousand
/Scaron/guilsinglleft/OE 145/quoteleft/quoteright
/quotedblleft/quotedblright/bullet/endash/emdash
/tilde/trademark/scaron/guilsinglright/oe/dotlessi
159/Ydieresis 164/currency 166/brokenbar 168/dieresis/copyright
/ordfeminine 172/logicalnot 174/registered/macron/ring
177/plusminus/twosuperior/threesuperior/acute/mu
183/periodcentered/cedilla/onesuperior/ordmasculine
188/onequarter/onehalf/threequarters 192/Agrave/Aacute
/Acircumflex/Atilde/Adieresis/Aring/AE/Ccedilla
/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute
/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute
/Ocircumflex/Otilde/Odieresis/multiply/Oslash
/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute/Thorn
/germandbls/agrave/aacute/acircumflex/atilde/adieresis
/aring/ae/ccedilla/egrave/eacute/ecircumflex
/edieresis/igrave/iacute/icircumflex/idieresis
/eth/ntilde/ograve/oacute/ocircumflex/otilde
/odieresis/divide/oslash/ugrave/uacute/ucircumflex
/udieresis/yacute/thorn/ydieresis
] def
"""
class PSCanvas:
def __init__(self,size=(300,300), PostScriptLevel=2):
self.width, self.height = size
xtraState = []
self._xtraState_push = xtraState.append
self._xtraState_pop = xtraState.pop
self.comments = 0
self.code = []
self.code_append = self.code.append
self._sep = '\n'
self._strokeColor = self._fillColor = self._lineWidth = \
self._font = self._fontSize = self._lineCap = \
self._lineJoin = self._color = None
self._fontsUsed = [] # track them as we go
self.setFont(STATE_DEFAULTS['fontName'],STATE_DEFAULTS['fontSize'])
self.setStrokeColor(STATE_DEFAULTS['strokeColor'])
self.setLineCap(2)
self.setLineJoin(0)
self.setLineWidth(1)
self.PostScriptLevel=PostScriptLevel
def comment(self,msg):
if self.comments: self.code_append('%'+msg)
def drawImage(self, image, x1,y1, x2=None,y2=None): # Postscript Level2 version
# select between postscript level 1 or level 2
if self.PostScriptLevel==1:
self._drawImageLevel1(image, x1,y1, x2=None,y2=None)
elif self.PostScriptLevel==2:
self._drawImageLevel2(image, x1,y1, x2=None,y2=None)
else :
raise ValueError('Unsupported Postscript Level %s' % self.PostScriptLevel)
def clear(self):
self.code_append('showpage') # ugh, this makes no sense oh well.
def _t1_re_encode(self):
if not self._fontsUsed: return
# for each font used, reencode the vectors
C = []
for fontName in self._fontsUsed:
fontObj = getFont(fontName)
if not fontObj._dynamicFont and fontObj.encName=='WinAnsiEncoding':
C.append('WinAnsiEncoding /%s /%s RE' % (fontName, fontName))
if C:
C.insert(0,PS_WinAnsiEncoding)
self.code.insert(1, self._sep.join(C))
def save(self,f=None):
if not hasattr(f,'write'):
_f = open(f,'wb')
else:
_f = f
if self.code[-1]!='showpage': self.clear()
self.code.insert(0,'''\
%%!PS-Adobe-3.0 EPSF-3.0
%%%%BoundingBox: 0 0 %d %d
%%%% Initialization:
/m {moveto} bind def
/l {lineto} bind def
/c {curveto} bind def
''' % (self.width,self.height))
self._t1_re_encode()
_f.write(rawBytes(self._sep.join(self.code)))
if _f is not f:
_f.close()
from reportlab.lib.utils import markfilename
markfilename(f,creatorcode='XPR3',filetype='EPSF')
def saveState(self):
self._xtraState_push((self._fontCodeLoc,))
self.code_append('gsave')
def restoreState(self):
self.code_append('grestore')
self._fontCodeLoc, = self._xtraState_pop()
def stringWidth(self, s, font=None, fontSize=None):
"""Return the logical width of the string if it were drawn
in the current font (defaults to self.font)."""
font = font or self._font
fontSize = fontSize or self._fontSize
return stringWidth(s, font, fontSize)
def setLineCap(self,v):
if self._lineCap!=v:
self._lineCap = v
self.code_append('%d setlinecap'%v)
def setLineJoin(self,v):
if self._lineJoin!=v:
self._lineJoin = v
self.code_append('%d setlinejoin'%v)
def setDash(self, array=[], phase=0):
"""Two notations. pass two numbers, or an array and phase"""
# copied and modified from reportlab.canvas
psoperation = "setdash"
if isinstance(array,(float,int)):
self.code_append('[%s %s] 0 %s' % (array, phase, psoperation))
elif isinstance(array,(tuple,list)):
assert phase >= 0, "phase is a length in user space"
textarray = ' '.join(map(str, array))
self.code_append('[%s] %s %s' % (textarray, phase, psoperation))
def setStrokeColor(self, color):
self._strokeColor = color
self.setColor(color)
def setColor(self, color):
if self._color!=color:
self._color = color
if color:
if hasattr(color, "cyan"):
self.code_append('%s setcmykcolor' % fp_str(color.cyan, color.magenta, color.yellow, color.black))
else:
self.code_append('%s setrgbcolor' % fp_str(color.red, color.green, color.blue))
def setFillColor(self, color):
self._fillColor = color
self.setColor(color)
def setLineWidth(self, width):
if width != self._lineWidth:
self._lineWidth = width
self.code_append('%s setlinewidth' % width)
def setFont(self,font,fontSize,leading=None):
if self._font!=font or self._fontSize!=fontSize:
self._fontCodeLoc = len(self.code)
self._font = font
self._fontSize = fontSize
self.code_append('')
def line(self, x1, y1, x2, y2):
if self._strokeColor != None:
self.setColor(self._strokeColor)
self.code_append('%s m %s l stroke' % (fp_str(x1, y1), fp_str(x2, y2)))
def _escape(self, s):
'''
return a copy of string s with special characters in postscript strings
escaped with backslashes.
'''
try:
return _escape_and_limit(s)
except:
raise ValueError("cannot escape %s" % ascii(s))
def _issueT1String(self,fontObj,x,y,s):
fc = fontObj
code_append = self.code_append
fontSize = self._fontSize
fontsUsed = self._fontsUsed
escape = self._escape
if not isUnicode(s):
try:
s = s.decode('utf8')
except UnicodeDecodeError as e:
i,j = e.args[2:4]
raise UnicodeDecodeError(*(e.args[:4]+('%s\n%s-->%s<--%s' % (e.args[4],s[i-10:i],s[i:j],s[j:j+10]),)))
for f, t in unicode2T1(s,[fontObj]+fontObj.substitutionFonts):
if f!=fc:
psName = asNative(f.face.name)
code_append('(%s) findfont %s scalefont setfont' % (psName,fp_str(fontSize)))
if psName not in fontsUsed:
fontsUsed.append(psName)
fc = f
code_append('%s m (%s) show ' % (fp_str(x,y),escape(t)))
x += f.stringWidth(t.decode(f.encName),fontSize)
if fontObj!=fc:
self._font = None
self.setFont(fontObj.face.name,fontSize)
def drawString(self, x, y, s, angle=0):
if self._fillColor != None:
fontObj = getFont(self._font)
if not self.code[self._fontCodeLoc]:
psName = asNative(fontObj.face.name)
self.code[self._fontCodeLoc]='(%s) findfont %s scalefont setfont' % (psName,fp_str(self._fontSize))
if psName not in self._fontsUsed:
self._fontsUsed.append(psName)
self.setColor(self._fillColor)
if angle!=0:
self.code_append('gsave %s translate %s rotate' % (fp_str(x,y),fp_str(angle)))
x = y = 0
if fontObj._dynamicFont:
s = self._escape(s)
self.code_append('%s m (%s) show ' % (fp_str(x,y),s))
else:
self._issueT1String(fontObj,x,y,s)
if angle!=0:
self.code_append('grestore')
def drawCentredString(self, x, y, text, text_anchor='middle'):
if self._fillColor is not None:
textLen = stringWidth(text, self._font,self._fontSize)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen/2.
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,self._font,self._fontSize)
self.drawString(x,y,text)
def drawRightString(self, text, x, y):
self.drawCentredString(text,x,y,text_anchor='end')
def drawCurve(self, x1, y1, x2, y2, x3, y3, x4, y4, closed=0):
codeline = '%s m %s curveto'
data = (fp_str(x1, y1), fp_str(x2, y2, x3, y3, x4, y4))
if self._fillColor != None:
self.setColor(self._fillColor)
self.code_append((codeline % data) + ' eofill')
if self._strokeColor != None:
self.setColor(self._strokeColor)
self.code_append((codeline % data)
+ ((closed and ' closepath') or '')
+ ' stroke')
########################################################################################
def rect(self, x1,y1, x2,y2, stroke=1, fill=1):
"Draw a rectangle between x1,y1, and x2,y2"
# Path is drawn in counter-clockwise direction"
x1, x2 = min(x1,x2), max(x1, x2) # from piddle.py
y1, y2 = min(y1,y2), max(y1, y2)
self.polygon(((x1,y1),(x2,y1),(x2,y2),(x1,y2)), closed=1, stroke=stroke, fill = fill)
def roundRect(self, x1,y1, x2,y2, rx=8, ry=8):
"""Draw a rounded rectangle between x1,y1, and x2,y2,
with corners inset as ellipses with x radius rx and y radius ry.
These should have x1<x2, y1<y2, rx>0, and ry>0."""
# Path is drawn in counter-clockwise direction
x1, x2 = min(x1,x2), max(x1, x2) # from piddle.py
y1, y2 = min(y1,y2), max(y1, y2)
# Note: arcto command draws a line from current point to beginning of arc
# save current matrix, translate to center of ellipse, scale by rx ry, and draw
# a circle of unit radius in counterclockwise dir, return to original matrix
# arguments are (cx, cy, rx, ry, startAngle, endAngle)
ellipsePath = 'matrix currentmatrix %s %s translate %s %s scale 0 0 1 %s %s arc setmatrix'
# choice between newpath and moveTo beginning of arc
# go with newpath for precision, does this violate any assumptions in code???
rr = ['newpath'] # Round Rect code path
a = rr.append
# upper left corner ellipse is first
a(ellipsePath % (x1+rx, y1+ry, rx, -ry, 90, 180))
a(ellipsePath % (x1+rx, y2-ry, rx, -ry, 180, 270))
a(ellipsePath % (x2-rx, y2-ry, rx, -ry, 270, 360))
a(ellipsePath % (x2-rx, y1+ry, rx, -ry, 0, 90) )
a('closepath')
self._fillAndStroke(rr)
def ellipse(self, x1,y1, x2,y2):
"""Draw an orthogonal ellipse inscribed within the rectangle x1,y1,x2,y2.
These should have x1<x2 and y1<y2."""
#Just invoke drawArc to actually draw the ellipse
self.drawArc(x1,y1, x2,y2)
def circle(self, xc, yc, r):
self.ellipse(xc-r,yc-r, xc+r,yc+r)
def drawArc(self, x1,y1, x2,y2, startAng=0, extent=360, fromcenter=0):
"""Draw a partial ellipse inscribed within the rectangle x1,y1,x2,y2,
starting at startAng degrees and covering extent degrees. Angles
start with 0 to the right (+x) and increase counter-clockwise.
These should have x1<x2 and y1<y2."""
#calculate centre of ellipse
#print "x1,y1,x2,y2,startAng,extent,fromcenter", x1,y1,x2,y2,startAng,extent,fromcenter
cx, cy = (x1+x2)/2.0, (y1+y2)/2.0
rx, ry = (x2-x1)/2.0, (y2-y1)/2.0
codeline = self._genArcCode(x1, y1, x2, y2, startAng, extent)
startAngleRadians = math.pi*startAng/180.0
extentRadians = math.pi*extent/180.0
endAngleRadians = startAngleRadians + extentRadians
codelineAppended = 0
# fill portion
if self._fillColor != None:
self.setColor(self._fillColor)
self.code_append(codeline)
codelineAppended = 1
if self._strokeColor!=None: self.code_append('gsave')
self.lineTo(cx,cy)
self.code_append('eofill')
if self._strokeColor!=None: self.code_append('grestore')
# stroke portion
if self._strokeColor != None:
# this is a bit hacked up. There is certainly a better way...
self.setColor(self._strokeColor)
(startx, starty) = (cx+rx*math.cos(startAngleRadians), cy+ry*math.sin(startAngleRadians))
if not codelineAppended:
self.code_append(codeline)
if fromcenter:
# move to center
self.lineTo(cx,cy)
self.lineTo(startx, starty)
self.code_append('closepath')
self.code_append('stroke')
def _genArcCode(self, x1, y1, x2, y2, startAng, extent):
"Calculate the path for an arc inscribed in rectangle defined by (x1,y1),(x2,y2)"
#calculate semi-minor and semi-major axes of ellipse
xScale = abs((x2-x1)/2.0)
yScale = abs((y2-y1)/2.0)
#calculate centre of ellipse
x, y = (x1+x2)/2.0, (y1+y2)/2.0
codeline = 'matrix currentmatrix %s %s translate %s %s scale 0 0 1 %s %s %s setmatrix'
if extent >= 0:
arc='arc'
else:
arc='arcn'
data = (x,y, xScale, yScale, startAng, startAng+extent, arc)
return codeline % data
def polygon(self, p, closed=0, stroke=1, fill=1):
assert len(p) >= 2, 'Polygon must have 2 or more points'
start = p[0]
p = p[1:]
poly = []
a = poly.append
a("%s m" % fp_str(start))
for point in p:
a("%s l" % fp_str(point))
if closed:
a("closepath")
self._fillAndStroke(poly,stroke=stroke,fill=fill)
def lines(self, lineList, color=None, width=None):
if self._strokeColor != None:
self._setColor(self._strokeColor)
codeline = '%s m %s l stroke'
for line in lineList:
self.code_append(codeline % (fp_str(line[0]),fp_str(line[1])))
def moveTo(self,x,y):
self.code_append('%s m' % fp_str(x, y))
def lineTo(self,x,y):
self.code_append('%s l' % fp_str(x, y))
def curveTo(self,x1,y1,x2,y2,x3,y3):
self.code_append('%s c' % fp_str(x1,y1,x2,y2,x3,y3))
def closePath(self):
self.code_append('closepath')
def polyLine(self, p):
assert len(p) >= 1, 'Polyline must have 1 or more points'
if self._strokeColor != None:
self.setColor(self._strokeColor)
self.moveTo(p[0][0], p[0][1])
for t in p[1:]:
self.lineTo(t[0], t[1])
self.code_append('stroke')
def drawFigure(self, partList, closed=0):
figureCode = []
a = figureCode.append
first = 1
for part in partList:
op = part[0]
args = list(part[1:])
if op == figureLine:
if first:
first = 0
a("%s m" % fp_str(args[:2]))
else:
a("%s l" % fp_str(args[:2]))
a("%s l" % fp_str(args[2:]))
elif op == figureArc:
first = 0
x1,y1,x2,y2,startAngle,extent = args[:6]
a(self._genArcCode(x1,y1,x2,y2,startAngle,extent))
elif op == figureCurve:
if first:
first = 0
a("%s m" % fp_str(args[:2]))
else:
a("%s l" % fp_str(args[:2]))
a("%s curveto" % fp_str(args[2:]))
else:
raise TypeError("unknown figure operator: "+op)
if closed:
a("closepath")
self._fillAndStroke(figureCode)
def _fillAndStroke(self,code,clip=0,fill=1,stroke=1):
fill = self._fillColor and fill
stroke = self._strokeColor and stroke
if fill or stroke or clip:
self.code.extend(code)
if fill:
if stroke or clip: self.code_append("gsave")
self.setColor(self._fillColor)
self.code_append("eofill")
if stroke or clip: self.code_append("grestore")
if stroke:
if clip: self.code_append("gsave")
self.setColor(self._strokeColor)
self.code_append("stroke")
if clip: self.code_append("grestore")
if clip:
self.code_append("clip")
self.code_append("newpath")
def translate(self,x,y):
self.code_append('%s translate' % fp_str(x,y))
def scale(self,x,y):
self.code_append('%s scale' % fp_str(x,y))
def transform(self,a,b,c,d,e,f):
self.code_append('[%s] concat' % fp_str(a,b,c,d,e,f))
def _drawTimeResize(self,w,h):
'''if this is used we're probably in the wrong world'''
self.width, self.height = w, h
############################################################################################
# drawImage(self. image, x1, y1, x2=None, y2=None) is now defined by either _drawImageLevel1
# ._drawImageLevel2, the choice is made in .__init__ depending on option
def _drawImageLevel1(self, image, x1, y1, x2=None,y2=None):
# Postscript Level1 version available for fallback mode when Level2 doesn't work
"""drawImage(self,image,x1,y1,x2=None,y2=None) : If x2 and y2 are ommitted, they are
calculated from image size. (x1,y1) is upper left of image, (x2,y2) is lower right of
image in piddle coordinates."""
# For now let's start with 24 bit RGB images (following piddlePDF again)
component_depth = 8
myimage = image.convert('RGB')
imgwidth, imgheight = myimage.size
if not x2:
x2 = imgwidth + x1
if not y2:
y2 = y1 + imgheight
drawwidth = x2 - x1
drawheight = y2 - y1
#print 'Image size (%d, %d); Draw size (%d, %d)' % (imgwidth, imgheight, drawwidth, drawheight)
# now I need to tell postscript how big image is
# "image operators assume that they receive sample data from
# their data source in x-axis major index order. The coordinate
# of the lower-left corner of the first sample is (0,0), of the
# second (1,0) and so on" -PS2 ref manual p. 215
#
# The ImageMatrix maps unit squre of user space to boundary of the source image
#
# The CurrentTransformationMatrix (CTM) maps the unit square of
# user space to the rect...on the page that is to receive the
# image. A common ImageMatrix is [width 0 0 -height 0 height]
# (for a left to right, top to bottom image )
# first let's map the user coordinates start at offset x1,y1 on page
self.code.extend([
'gsave',
'%s %s translate' % (x1,-y1 - drawheight), # need to start are lower left of image
'%s %s scale' % (drawwidth,drawheight),
'/scanline %d 3 mul string def' % imgwidth # scanline by multiples of image width
])
# now push the dimensions and depth info onto the stack
# and push the ImageMatrix to map the source to the target rectangle (see above)
# finally specify source (PS2 pp. 225 ) and by exmample
self.code.extend([
'%s %s %s' % (imgwidth, imgheight, component_depth),
'[%s %s %s %s %s %s]' % (imgwidth, 0, 0, -imgheight, 0, imgheight),
'{ currentfile scanline readhexstring pop } false 3',
'colorimage '
])
# data source output--now we just need to deliver a hex encode
# series of lines of the right overall size can follow
# piddlePDF again
rawimage = myimage.tostring()
hex_encoded = self._AsciiHexEncode(rawimage)
# write in blocks of 78 chars per line
outstream = getStringIO(hex_encoded)
dataline = outstream.read(78)
while dataline != "":
self.code_append(dataline)
dataline= outstream.read(78)
self.code_append('% end of image data') # for clarity
self.code_append('grestore') # return coordinates to normal
# end of drawImage
def _AsciiHexEncode(self, input): # also based on piddlePDF
"Helper function used by images"
output = getStringIO()
for char in asBytes(input):
output.write('%02x' % char2int(char))
return output.getvalue()
def _drawImageLevel2(self, image, x1,y1, x2=None,y2=None): # Postscript Level2 version
'''At present we're handling only PIL'''
### what sort of image are we to draw
if image.mode=='L' :
imBitsPerComponent = 8
imNumComponents = 1
myimage = image
elif image.mode == '1':
myimage = image.convert('L')
imNumComponents = 1
myimage = image
else :
myimage = image.convert('RGB')
imNumComponents = 3
imBitsPerComponent = 8
imwidth, imheight = myimage.size
if not x2:
x2 = imwidth + x1
if not y2:
y2 = y1 + imheight
drawwidth = x2 - x1
drawheight = y2 - y1
self.code.extend([
'gsave',
'%s %s translate' % (x1,-y1 - drawheight), # need to start are lower left of image
'%s %s scale' % (drawwidth,drawheight)])
if imNumComponents == 3 :
self.code_append('/DeviceRGB setcolorspace')
elif imNumComponents == 1 :
self.code_append('/DeviceGray setcolorspace')
# create the image dictionary
self.code_append("""
<<
/ImageType 1
/Width %d /Height %d %% dimensions of source image
/BitsPerComponent %d""" % (imwidth, imheight, imBitsPerComponent) )
if imNumComponents == 1:
self.code_append('/Decode [0 1]')
if imNumComponents == 3:
self.code_append('/Decode [0 1 0 1 0 1] %% decode color values normally')
self.code.extend([ '/ImageMatrix [%s 0 0 %s 0 %s]' % (imwidth, -imheight, imheight),
'/DataSource currentfile /ASCIIHexDecode filter',
'>> % End image dictionary',
'image'])
# after image operator just need to dump image dat to file as hexstring
rawimage = myimage.tostring()
hex_encoded = self._AsciiHexEncode(rawimage)
# write in blocks of 78 chars per line
outstream = getStringIO(hex_encoded)
dataline = outstream.read(78)
while dataline != "":
self.code_append(dataline)
dataline= outstream.read(78)
self.code_append('> % end of image data') # > is EOD for hex encoded filterfor clarity
self.code_append('grestore') # return coordinates to normal
# renderpdf - draws them onto a canvas
"""Usage:
from reportlab.graphics import renderPS
renderPS.draw(drawing, canvas, x, y)
Execute the script to see some test drawings."""
from reportlab.graphics.shapes import *
# hack so we only get warnings once each
#warnOnce = WarnOnce()
# the main entry point for users...
def draw(drawing, canvas, x=0, y=0, showBoundary=rl_config.showBoundary):
"""As it says"""
R = _PSRenderer()
R.draw(renderScaledDrawing(drawing), canvas, x, y, showBoundary=showBoundary)
def _pointsFromList(L):
'''
given a list of coordinates [x0, y0, x1, y1....]
produce a list of points [(x0,y0), (y1,y0),....]
'''
P=[]
a = P.append
for i in range(0,len(L),2):
a((L[i],L[i+1]))
return P
class _PSRenderer(Renderer):
"""This draws onto a EPS document. It needs to be a class
rather than a function, as some EPS-specific state tracking is
needed outside of the state info in the SVG model."""
def __init__(self):
self._tracker = StateTracker()
def drawNode(self, node):
"""This is the recursive method called for each node
in the tree"""
self._canvas.comment('begin node %r'%node)
color = self._canvas._color
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.saveState()
#apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
#draw the object, or recurse
self.drawNodeDispatcher(node)
rDeltas = self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.restoreState()
self._canvas.comment('end node %r'%node)
self._canvas._color = color
#restore things we might have lost (without actually doing anything).
for k, v in rDeltas.items():
if k in self._restores:
setattr(self._canvas,self._restores[k],v)
## _restores = {'stroke':'_stroke','stroke_width': '_lineWidth','stroke_linecap':'_lineCap',
## 'stroke_linejoin':'_lineJoin','fill':'_fill','font_family':'_font',
## 'font_size':'_fontSize'}
_restores = {'strokeColor':'_strokeColor','strokeWidth': '_lineWidth','strokeLineCap':'_lineCap',
'strokeLineJoin':'_lineJoin','fillColor':'_fillColor','fontName':'_font',
'fontSize':'_fontSize'}
def drawRect(self, rect):
if rect.rx == rect.ry == 0:
#plain old rectangle
self._canvas.rect(
rect.x, rect.y,
rect.x+rect.width, rect.y+rect.height)
else:
#cheat and assume ry = rx; better to generalize
#pdfgen roundRect function. TODO
self._canvas.roundRect(
rect.x, rect.y,
rect.x+rect.width, rect.y+rect.height, rect.rx, rect.ry
)
def drawLine(self, line):
if self._canvas._strokeColor:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle( circle.cx, circle.cy, circle.r)
def drawWedge(self, wedge):
yradius, radius1, yradius1 = wedge._xtraRadii()
if (radius1==0 or radius1 is None) and (yradius1==0 or yradius1 is None):
startangledegrees = wedge.startangledegrees
endangledegrees = wedge.endangledegrees
centerx= wedge.centerx
centery = wedge.centery
radius = wedge.radius
extent = endangledegrees - startangledegrees
self._canvas.drawArc(centerx-radius, centery-yradius, centerx+radius, centery+yradius,
startangledegrees, extent, fromcenter=1)
else:
self.drawPolygon(wedge.asPolygon())
def drawPolyLine(self, p):
if self._canvas._strokeColor:
self._canvas.polyLine(_pointsFromList(p.points))
def drawEllipse(self, ellipse):
#need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1,y1,x2,y2)
def drawPolygon(self, p):
self._canvas.polygon(_pointsFromList(p.points), closed=1)
def drawString(self, stringObj):
if self._canvas._fillColor:
S = self._tracker.getState()
text_anchor, x, y, text = S['textAnchor'], stringObj.x,stringObj.y,stringObj.text
if not text_anchor in ['start','inherited']:
font, fontSize = S['fontName'], S['fontSize']
textLen = stringWidth(text, font,fontSize)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen/2
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,font,fontSize,encoding='winansi')
else:
raise ValueError('bad value for text_anchor '+str(text_anchor))
self._canvas.drawString(x,y,text)
def drawPath(self, path):
from reportlab.graphics.shapes import _renderPath
c = self._canvas
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.closePath)
isClosed = _renderPath(path, drawFuncs)
if not isClosed:
c._fillColor = None
c._fillAndStroke([], clip=path.isClipPath)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the operators
needed to set those properties"""
for key, value in delta.items():
if key == 'transform':
self._canvas.transform(value[0], value[1], value[2],
value[3], value[4], value[5])
elif key == 'strokeColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
self._canvas.setStrokeColor(value)
elif key == 'strokeWidth':
self._canvas.setLineWidth(value)
elif key == 'strokeLineCap': #0,1,2
self._canvas.setLineCap(value)
elif key == 'strokeLineJoin':
self._canvas.setLineJoin(value)
elif key == 'strokeDashArray':
if value:
if isinstance(value,(list,tuple)) and len(value)==2 and isinstance(value[1],(tuple,list)):
phase = value[0]
value = value[1]
else:
phase = 0
self._canvas.setDash(value,phase)
else:
self._canvas.setDash()
## elif key == 'stroke_opacity':
## warnOnce('Stroke Opacity not supported yet')
elif key == 'fillColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
self._canvas.setFillColor(value)
## elif key == 'fill_rule':
## warnOnce('Fill rules not done yet')
## elif key == 'fill_opacity':
## warnOnce('Fill opacity not done yet')
elif key in ['fontSize', 'fontName']:
# both need setting together in PDF
# one or both might be in the deltas,
# so need to get whichever is missing
fontname = delta.get('fontName', self._canvas._font)
fontsize = delta.get('fontSize', self._canvas._fontSize)
self._canvas.setFont(fontname, fontsize)
def drawImage(self, image):
from reportlab.lib.utils import ImageReader
im = ImageReader(image.path)
x0 = image.x
y0 = image.y
x1 = image.width
if x1 is not None: x1 += x0
y1 = image.height
if y1 is not None: y1 += y0
self._canvas.drawImage(im._image,x0,y0,x1,y1)
def drawToFile(d,fn, showBoundary=rl_config.showBoundary,**kwd):
d = renderScaledDrawing(d)
c = PSCanvas((d.width,d.height))
draw(d, c, 0, 0, showBoundary=showBoundary)
c.save(fn)
def drawToString(d, showBoundary=rl_config.showBoundary):
"Returns a PS as a string in memory, without touching the disk"
s = getBytesIO()
drawToFile(d, s, showBoundary=showBoundary)
return s.getvalue()
#########################################################
#
# test code. First, defin a bunch of drawings.
# Routine to draw them comes at the end.
#
#########################################################
def test(outDir='epsout',shout=False):
from reportlab.graphics import testshapes
from reportlab.rl_config import verbose
OLDFONTS = testshapes._FONTS[:]
testshapes._FONTS[:] = ['Times-Roman','Times-Bold','Times-Italic', 'Times-BoldItalic','Courier']
try:
import os
# save all drawings and their doc strings from the test file
if not os.path.isdir(outDir):
os.mkdir(outDir)
#grab all drawings from the test module
drawings = []
for funcname in dir(testshapes):
if funcname[0:10] == 'getDrawing':
drawing = eval('testshapes.' + funcname + '()') #execute it
docstring = eval('testshapes.' + funcname + '.__doc__')
drawings.append((drawing, docstring))
i = 0
for (d, docstring) in drawings:
filename = outDir + os.sep + 'renderPS_%d.eps'%i
drawToFile(d,filename)
if shout or verbose>2: print('renderPS test saved %s' % ascii(filename))
i += 1
finally:
testshapes._FONTS[:] = OLDFONTS
if __name__=='__main__':
import sys
if len(sys.argv)>1:
outdir = sys.argv[1]
else:
outdir = 'epsout'
test(outdir,shout=True)
|