Current File : //lib/python3/dist-packages/reportlab/graphics/renderPS.py
#Copyright ReportLab Europe Ltd. 2000-2017
#see license.txt for license details
#history https://hg.reportlab.com/hg-public/reportlab/log/tip/src/reportlab/graphics/renderPS.py
__version__='3.3.0'
__doc__="""Render drawing objects in Postscript"""
import math
from io import BytesIO, StringIO
from reportlab.pdfbase.pdfmetrics import getFont, stringWidth, unicode2T1 # for font info
from reportlab.lib.utils import asBytes, char2int, rawBytes, asNative, isUnicode
from reportlab.lib.rl_accel import fp_str
from reportlab.graphics.renderbase import Renderer, getStateDelta, renderScaledDrawing
from reportlab.graphics.shapes import STATE_DEFAULTS
from reportlab import rl_config
from reportlab.pdfgen.canvas import FILL_EVEN_ODD
_ESCAPEDICT={}
for c in range(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
self._fillMode = FILL_EVEN_ODD
def comment(self,msg):
if self.comments: self.code_append('%'+msg)
def drawImage(self, image, x1,y1, width=None,height=None): # Postscript Level2 version
# select between postscript level 1 or level 2
if self.PostScriptLevel==1:
self._drawImageLevel1(image, x1,y1, width, height)
elif self.PostScriptLevel==2:
self._drawImageLevel2(image, x1, y1, width, height)
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 setFillMode(self, v):
self._fillMode = v
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 _textOut(self, x, y, s, textRenderMode=0):
if textRenderMode==3: return
xy = fp_str(x,y)
s = self._escape(s)
if textRenderMode==0: #the standard case
self.setColor(self._fillColor)
self.code_append('%s m (%s) show ' % (xy,s))
return
fill = textRenderMode==0 or textRenderMode==2 or textRenderMode==4 or textRenderMode==6
stroke = textRenderMode==1 or textRenderMode==2 or textRenderMode==5 or textRenderMode==6
addToClip = textRenderMode>=4
if fill and stroke:
if self._fillColor is None:
op = ''
else:
op = 'fill '
self.setColor(self._fillColor)
self.code_append('%s m (%s) true charpath gsave %s' % (xy,s,op))
self.code_append('grestore ')
if self._strokeColor is not None:
self.setColor(self._strokeColor)
self.code_append('stroke ')
else: #can only be stroke alone
self.setColor(self._strokeColor)
self.code_append('%s m (%s) true charpath stroke ' % (xy,s))
def _issueT1String(self,fontObj,x,y,s, textRenderMode=0):
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
self._textOut(x,y,t,textRenderMode)
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, text_anchor='left', textRenderMode=0):
needFill = textRenderMode in (0,2,4,6)
needStroke = textRenderMode in (1,2,5,6)
if needFill or needStroke:
if text_anchor!='left':
textLen = stringWidth(s, 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,s,textLen,self._font,self._fontSize)
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)
if angle!=0:
self.code_append('gsave %s translate %s rotate' % (fp_str(x,y),fp_str(angle)))
x = y = 0
oldColor = self._color
if fontObj._dynamicFont:
self._textOut(x, y, s, textRenderMode=textRenderMode)
else:
self._issueT1String(fontObj,x,y,s, textRenderMode=textRenderMode)
self.setColor(oldColor)
if angle!=0:
self.code_append('grestore')
def drawCentredString(self, x, y, text, text_anchor='middle', textRenderMode=0):
self.drawString(x,y,text, text_anchor=text_anchor, textRenderMode=textRenderMode)
def drawRightString(self, text, x, y, text_anchor='end', textRenderMode=0):
self.drawString(text,x,y,text_anchor=text_anchor, textRenderMode=textRenderMode)
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,fillMode=None):
fill = self._fillColor and fill
stroke = self._strokeColor and stroke
if fill or stroke or clip:
self.code.extend(code)
if fill:
if fillMode is None:
fillMode = self._fillMode
if stroke or clip: self.code_append("gsave")
self.setColor(self._fillColor)
self.code_append("eofill" if fillMode==FILL_EVEN_ODD else "fill")
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
def _drawImageLevel1(self, image, x1, y1, width=None, height=None):
# Postscript Level1 version available for fallback mode when Level2 doesn't work
# 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 width:
width = imgwidth
if not height:
height = imgheight
#print 'Image size (%d, %d); Draw size (%d, %d)' % (imgwidth, imgheight, width, height)
# 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), # need to start are lower left of image
'%s %s scale' % (width,height),
'/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.tobytes if hasattr(myimage,'tobytes') else myimage.tostring)()
hex_encoded = self._AsciiHexEncode(rawimage)
# write in blocks of 78 chars per line
outstream = StringIO(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 = StringIO()
for char in asBytes(input):
output.write('%02x' % char2int(char))
return output.getvalue()
def _drawImageLevel2(self, image, x1,y1, width=None,height=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 width:
width = imwidth
if not height:
height = imheight
self.code.extend([
'gsave',
'%s %s translate' % (x1,y1), # need to start are lower left of image
'%s %s scale' % (width,height)])
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.tobytes if hasattr(myimage,'tobytes') else myimage.tostring)()
hex_encoded = self._AsciiHexEncode(rawimage)
# write in blocks of 78 chars per line
outstream = StringIO(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 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) and not wedge.annular:
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:
P = wedge.asPolygon()
if isinstance(P,Path):
self.drawPath(P)
else:
self.drawPolygon(P)
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):
textRenderMode = getattr(stringObj,'textRenderMode',0)
if self._canvas._fillColor or textRenderMode:
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, textRenderMode=textRenderMode)
def drawPath(self, path, fillMode=None):
from reportlab.graphics.shapes import _renderPath
c = self._canvas
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.closePath)
autoclose = getattr(path,'autoclose','')
def rP(**kwds):
return _renderPath(path, drawFuncs, **kwds)
if fillMode is None:
fillMode = getattr(path,'fillMode',c._fillMode)
fill = c._fillColor is not None
stroke = c._strokeColor is not None
clip = path.isClipPath
fas = lambda **kwds: c._fillAndStroke([], fillMode=fillMode, **kwds)
pathFill = lambda : c._fillAndStroke([], stroke=0, fillMode=fillMode)
pathStroke = lambda : c._fillAndStroke([], fill=0)
if autoclose=='svg':
rP()
fas(stroke=stroke,fill=fill,clip=clip)
elif autoclose=='pdf':
if fill:
rP(forceClose=True)
fas(stroke=stroke,fill=fill,clip=clip)
elif stroke or clip:
rP()
fas(stroke=stroke,fill=0,clip=clip)
else:
if fill and rP(countOnly=True):
rP()
elif stroke or clip:
rP()
fas(stroke=stroke,fill=0,clip=clip)
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)
self._canvas.drawImage(im._image,image.x,image.y,image.width,image.height)
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 = BytesIO()
drawToFile(d, s, showBoundary=showBoundary)
return s.getvalue()
#########################################################
#
# test code. First, define 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':
func = getattr(testshapes,funcname)
drawing = func()
docstring = getattr(func,'__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)
Mini Shell