Current File : //lib/python3/dist-packages/reportlab/graphics/renderPM.py
#Copyright ReportLab Europe Ltd. 2000-2017
#see license.txt for license details
#history www.reportlab.co.uk/rl-cgi/viewcvs.cgi/rlextra/graphics/Csrc/renderPM/renderP.py
__version__='3.3.0'
__doc__="""Render drawing objects in common bitmap formats
Usage::
from reportlab.graphics import renderPM
renderPM.drawToFile(drawing,filename,fmt='GIF',configPIL={....})
Other functions let you create a PM drawing as string or into a PM buffer.
Execute the script to see some test drawings."""
from reportlab.graphics.shapes import *
from reportlab.graphics.renderbase import getStateDelta, renderScaledDrawing
from reportlab.pdfbase.pdfmetrics import getFont, unicode2T1
from reportlab.lib.utils import isUnicode
from reportlab import rl_config
from .utils import setFont as _setFont, RenderPMError
import os, sys
from io import BytesIO, StringIO
from math import sin, cos, pi, ceil
def _getPMBackend(backend=None):
if not backend: backend = rl_config.renderPMBackend
if backend=='_renderPM':
try:
import _rl_renderPM as M
except ImportError as errMsg:
try:
import rlPyCairo as M
except ImportError:
raise RenderPMError("""Cannot import desired renderPM backend, {backend}.
No module named _rl_renderPM
it may be badly or not installed!
You may need to install development tools
or seek advice at the users list see
https://pairlist2.pair.net/mailman/listinfo/reportlab-users""")
elif 'cairo' in backend.lower():
try:
import rlPyCairo as M
except ImportError as errMsg:
try:
import _rl_renderPM as M
except ImportError:
raise RenderPMError(f"""cannot import desired renderPM backend {backend}
Seek advice at the users list see
https://pairlist2.pair.net/mailman/listinfo/reportlab-users""")
else:
raise RenderPMError(f'Invalid renderPM backend, {backend}')
return M
try:
_pmBackend = _getPMBackend(rl_config.renderPMBackend)
except RenderPMError:
_pmBackend=None
def _getImage():
try:
from PIL import Image
except ImportError:
import Image
return Image
def Color2Hex(c):
#assert isinstance(colorobj, colors.Color) #these checks don't work well RGB
if c: return ((0xFF&int(255*c.red)) << 16) | ((0xFF&int(255*c.green)) << 8) | (0xFF&int(255*c.blue))
return c
# the main entry point for users...
def draw(drawing, canvas, x, y, showBoundary=rl_config._unset_):
"""As it says"""
R = _PMRenderer()
R.draw(renderScaledDrawing(drawing), canvas, x, y, showBoundary=showBoundary)
from reportlab.graphics.renderbase import Renderer
class _PMRenderer(Renderer):
"""This draws onto a pix map image. It needs to be a class
rather than a function, as some image-specific state tracking is
needed outside of the state info in the SVG model."""
def pop(self):
self._tracker.pop()
self.applyState()
def push(self,node):
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyState()
def applyState(self):
s = self._tracker.getState()
self._canvas.ctm = s['ctm']
self._canvas.strokeWidth = s['strokeWidth']
alpha = s['strokeOpacity']
if alpha is not None:
self._canvas.strokeOpacity = alpha
self._canvas.setStrokeColor(s['strokeColor'])
self._canvas.lineCap = s['strokeLineCap']
self._canvas.lineJoin = s['strokeLineJoin']
self._canvas.fillMode = s['fillMode']
da = s['strokeDashArray']
if not da:
da = None
else:
if not isinstance(da,(list,tuple)):
da = da,
if len(da)!=2 or not isinstance(da[1],(list,tuple)):
da = 0, da #assume phase of 0
self._canvas.dashArray = da
alpha = s['fillOpacity']
if alpha is not None:
self._canvas.fillOpacity = alpha
self._canvas.setFillColor(s['fillColor'])
self._canvas.setFont(s['fontName'], s['fontSize'])
def initState(self,x,y):
deltas = self._tracker._combined[-1]
deltas['transform'] = deltas['ctm'] = self._canvas._baseCTM[0:4]+(x,y)
self._tracker.push(deltas)
self.applyState()
def drawNode(self, node):
"""This is the recursive method called for each node
in the tree"""
#apply state changes
self.push(node)
#draw the object, or recurse
self.drawNodeDispatcher(node)
# restore the state
self.pop()
def drawRect(self, rect):
c = self._canvas
if rect.rx == rect.ry == 0:
#plain old rectangle, draw clockwise (x-axis to y-axis) direction
c.rect(rect.x,rect.y, rect.width, rect.height)
else:
c.roundRect(rect.x,rect.y, rect.width, rect.height, rect.rx, rect.ry)
def drawLine(self, line):
self._canvas.line(line.x1,line.y1,line.x2,line.y2)
def drawImage(self, image):
path = image.path
if isinstance(path,str):
if not (path and os.path.isfile(path)): return
im = _getImage().open(path).convert('RGB')
elif hasattr(path,'convert'):
im = path.convert('RGB')
else:
return
srcW, srcH = im.size
dstW, dstH = image.width, image.height
if dstW is None: dstW = srcW
if dstH is None: dstH = srcH
self._canvas._aapixbuf(
image.x, image.y, dstW, dstH,
(im if self._canvas._backend=='rlPyCairo' #rlPyCairo has a from_pil method
else (im.tobytes if hasattr(im,'tobytes') else im.tostring)()),
srcW, srcH, 3,
)
def drawCircle(self, circle):
c = self._canvas
c.circle(circle.cx,circle.cy, circle.r)
c.fillstrokepath()
def drawPolyLine(self, polyline, _doClose=0):
P = polyline.points
assert len(P) >= 2, 'Polyline must have 1 or more points'
c = self._canvas
c.pathBegin()
c.moveTo(P[0], P[1])
for i in range(2, len(P), 2):
c.lineTo(P[i], P[i+1])
if _doClose:
c.pathClose()
c.pathFill()
c.pathStroke()
def drawEllipse(self, ellipse):
c=self._canvas
c.ellipse(ellipse.cx, ellipse.cy, ellipse.rx,ellipse.ry)
c.fillstrokepath()
def drawPolygon(self, polygon):
self.drawPolyLine(polygon,_doClose=1)
def drawString(self, stringObj):
canv = self._canvas
fill = canv.fillColor
textRenderMode = getattr(stringObj,'textRenderMode',0)
if fill is not None or textRenderMode:
S = self._tracker.getState()
text_anchor = S['textAnchor']
fontName = S['fontName']
fontSize = S['fontSize']
text = stringObj.text
x = stringObj.x
y = stringObj.y
if not text_anchor in ['start','inherited']:
textLen = stringWidth(text, fontName,fontSize)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen/2
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,fontName,fontSize,stringObj.encoding)
else:
raise ValueError('bad value for textAnchor '+str(text_anchor))
oldTextRenderMode = canv.textRenderMode
canv.textRenderMode = textRenderMode
try:
canv.drawString(x,y,text,_fontInfo=(fontName,fontSize))
finally:
canv.textRenderMode = oldTextRenderMode
def drawPath(self, path):
c = self._canvas
if path is EmptyClipPath:
del c._clipPaths[-1]
if c._clipPaths:
P = c._clipPaths[-1]
icp = P.isClipPath
P.isClipPath = 1
self.drawPath(P)
P.isClipPath = icp
else:
c.clipPathClear()
return
from reportlab.graphics.shapes import _renderPath
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.pathClose)
autoclose = getattr(path,'autoclose','')
def rP(forceClose=False):
c.pathBegin()
return _renderPath(path, drawFuncs, forceClose=forceClose)
if path.isClipPath:
rP()
c.clipPathSet()
c._clipPaths.append(path)
fill = c.fillColor is not None
stroke = c.strokeColor is not None
fillMode = getattr(path,'fillMode',-1)
if autoclose=='svg':
if fill and stroke:
rP(forceClose=True)
c.pathFill(fillMode)
rP()
c.pathStroke()
elif fill:
rP(forceClose=True)
c.pathFill(fillMode)
elif stroke:
rP()
c.pathStroke()
elif autoclose=='pdf':
rP(forceClose=True)
if fill:
c.pathFill(fillMode)
if stroke:
c.pathStroke()
else:
if rP():
c.pathFill(fillMode)
c.pathStroke()
def _convert2pilp(im):
Image = _getImage()
return im.convert("P", dither=Image.NONE, palette=Image.ADAPTIVE)
def _convert2pilL(im):
return im.convert("L")
def _convert2pil1(im):
return im.convert("1")
def _saveAsPICT(im,fn,fmt,transparent=None):
im = _convert2pilp(im)
cols, rows = im.size
s = _pmBackend.pil2pict(cols,rows,(im.tobytes if hasattr(im,'tobytes') else im.tostring)(),im.im.getpalette())
if not hasattr(fn,'write'):
with open(os.path.splitext(fn)[0]+'.'+fmt.lower(),'wb') as f:
f.write(s)
if os.name=='mac':
from reportlab.lib.utils import markfilename
markfilename(fn,ext='PICT')
else:
fn.write(s)
BEZIER_ARC_MAGIC = 0.5522847498 #constant for drawing circular arcs w/ Beziers
class PMCanvas:
def __init__(self,w,h,dpi=72,bg=0xffffff,configPIL=None,backend=None,
backendFmt='RGB'):
'''configPIL dict is passed to image save method'''
scale = dpi/72.0
w = int(w*scale+0.5)
h = int(h*scale+0.5)
self.__dict__['_gs'] = self._getGState(w,h,bg,backend)
self.__dict__['_bg'] = bg
self.__dict__['_baseCTM'] = (scale,0,0,scale,0,0)
self.__dict__['_clipPaths'] = []
self.__dict__['configPIL'] = configPIL
self.__dict__['_dpi'] = dpi
#the _rl_renderPM.gstate object doesn't support hasattr so we use this as a proxy test for 'isbuiltin'
self.__dict__['_backend'] = '_renderPM' if type(self._gs._aapixbuf)==type(pow) else 'rlPyCairo'
self.__dict__['_backendfmt'] = backendFmt
self.ctm = self._baseCTM
@staticmethod
def _getGState(w, h, bg, backend=None, fmt='RGB24'):
mod = _getPMBackend(backend)
if backend is None:
backend = rl_config.renderPMBackend
if backend=='_renderPM':
try:
return mod.gstate(w,h,bg=bg)
except TypeError:
try:
return mod.GState(w,h,bg,fmt=fmt)
except:
pass
elif 'cairo' in backend.lower():
try:
return mod.GState(w,h,bg,fmt=fmt)
except AttributeError:
return mod.gstate(w,h,bg=bg)
raise RuntimeError(f'Cannot obtain PM graphics state using backend {backend!r}')
def _drawTimeResize(self,w,h,bg=None):
if bg is None: bg = self._bg
self._drawing.width, self._drawing.height = w, h
A = {'ctm':None, 'strokeWidth':None, 'strokeColor':None, 'lineCap':None, 'lineJoin':None, 'dashArray':None, 'fillColor':None}
gs = self._gs
fN,fS = gs.fontName, gs.fontSize
for k in A.keys():
A[k] = getattr(gs,k)
del gs, self._gs
gs = self.__dict__['_gs'] = _pmBackend.gstate(w,h,bg=bg)
for k in A.keys():
setattr(self,k,A[k])
gs.setFont(fN,fS)
def toPIL(self):
im = _getImage().new('RGB', size=(self._gs.width, self._gs.height))
im.frombytes(self._gs.pixBuf)
return im
def saveToFile(self,fn,fmt=None):
im = self.toPIL()
if fmt is None:
if not isinstance(fn,str):
raise ValueError("Invalid value '%s' for fn when fmt is None" % ascii(fn))
fmt = os.path.splitext(fn)[1]
if fmt.startswith('.'): fmt = fmt[1:]
configPIL = self.configPIL or {}
configPIL.setdefault('preConvertCB',None)
preConvertCB=configPIL.pop('preConvertCB')
if preConvertCB:
im = preConvertCB(im)
fmt = fmt.upper()
if fmt in ('GIF',):
im = _convert2pilp(im)
elif fmt in ('TIFF','TIFFP','TIFFL','TIF','TIFF1'):
if fmt.endswith('P'):
im = _convert2pilp(im)
elif fmt.endswith('L'):
im = _convert2pilL(im)
elif fmt.endswith('1'):
im = _convert2pil1(im)
fmt='TIFF'
elif fmt in ('PCT','PICT'):
return _saveAsPICT(im,fn,fmt,transparent=configPIL.get('transparent',None))
elif fmt in ('PNG','BMP', 'PPM'):
pass
elif fmt in ('JPG','JPEG'):
fmt = 'JPEG'
else:
raise RenderPMError("Unknown image kind %s" % fmt)
if fmt=='TIFF':
tc = configPIL.get('transparent',None)
if tc:
from PIL import ImageChops, Image
T = 768*[0]
for o, c in zip((0,256,512), tc.bitmap_rgb()):
T[o+c] = 255
#if isinstance(fn,str): ImageChops.invert(im.point(T).convert('L').point(255*[0]+[255])).save(fn+'_mask.gif','GIF')
im = Image.merge('RGBA', im.split()+(ImageChops.invert(im.point(T).convert('L').point(255*[0]+[255])),))
#if isinstance(fn,str): im.save(fn+'_masked.gif','GIF')
for a,d in ('resolution',self._dpi),('resolution unit','inch'):
configPIL[a] = configPIL.get(a,d)
configPIL.setdefault('chops_invert',0)
if configPIL.pop('chops_invert'):
from PIL import ImageChops
im = ImageChops.invert(im)
configPIL.setdefault('preSaveCB',None)
preSaveCB=configPIL.pop('preSaveCB')
if preSaveCB:
im = preSaveCB(im)
im.save(fn,fmt,**configPIL)
if not hasattr(fn,'write') and os.name=='mac':
from reportlab.lib.utils import markfilename
markfilename(fn,ext=fmt)
def saveToString(self,fmt='GIF'):
s = BytesIO()
self.saveToFile(s,fmt=fmt)
return s.getvalue()
def _saveToBMP(self,f):
'''
Niki Spahiev, <niki@vintech.bg>, asserts that this is a respectable way to get BMP without PIL
f is a file like object to which the BMP is written
'''
import struct
gs = self._gs
pix, width, height = gs.pixBuf, gs.width, gs.height
f.write(struct.pack('=2sLLLLLLhh24x','BM',len(pix)+54,0,54,40,width,height,1,24))
rowb = width * 3
for o in range(len(pix),0,-rowb):
f.write(pix[o-rowb:o])
f.write( '\0' * 14 )
def setFont(self,fontName,fontSize,leading=None):
_setFont(self._gs,fontName,fontSize)
def __setattr__(self,name,value):
setattr(self._gs,name,value)
def __getattr__(self,name):
return getattr(self._gs,name)
def fillstrokepath(self,stroke=1,fill=1):
if fill: self.pathFill()
if stroke: self.pathStroke()
def _bezierArcSegmentCCW(self, cx,cy, rx,ry, theta0, theta1):
"""compute the control points for a bezier arc with theta1-theta0 <= 90.
Points are computed for an arc with angle theta increasing in the
counter-clockwise (CCW) direction. returns a tuple with starting point
and 3 control points of a cubic bezier curve for the curvto opertator"""
# Requires theta1 - theta0 <= 90 for a good approximation
assert abs(theta1 - theta0) <= 90
cos0 = cos(pi*theta0/180.0)
sin0 = sin(pi*theta0/180.0)
x0 = cx + rx*cos0
y0 = cy + ry*sin0
cos1 = cos(pi*theta1/180.0)
sin1 = sin(pi*theta1/180.0)
x3 = cx + rx*cos1
y3 = cy + ry*sin1
dx1 = -rx * sin0
dy1 = ry * cos0
#from pdfgeom
halfAng = pi*(theta1-theta0)/(2.0 * 180.0)
k = abs(4.0 / 3.0 * (1.0 - cos(halfAng) ) /(sin(halfAng)) )
x1 = x0 + dx1 * k
y1 = y0 + dy1 * k
dx2 = -rx * sin1
dy2 = ry * cos1
x2 = x3 - dx2 * k
y2 = y3 - dy2 * k
return ((x0,y0), ((x1,y1), (x2,y2), (x3,y3)) )
def bezierArcCCW(self, cx,cy, rx,ry, theta0, theta1):
"""return a set of control points for Bezier approximation to an arc
with angle increasing counter clockwise. No requirement on (theta1-theta0) <= 90
However, it must be true that theta1-theta0 > 0."""
# I believe this is also clockwise
# pretty much just like Robert Kern's pdfgeom.BezierArc
angularExtent = theta1 - theta0
# break down the arc into fragments of <=90 degrees
if abs(angularExtent) <= 90.0: # we just need one fragment
angleList = [(theta0,theta1)]
else:
Nfrag = int( ceil( abs(angularExtent)/90.) )
fragAngle = float(angularExtent)/ Nfrag # this could be negative
angleList = []
for ii in range(Nfrag):
a = theta0 + ii * fragAngle
b = a + fragAngle # hmm.. is I wonder if this is precise enought
angleList.append((a,b))
ctrlpts = []
for (a,b) in angleList:
if not ctrlpts: # first time
[(x0,y0), pts] = self._bezierArcSegmentCCW(cx,cy, rx,ry, a,b)
ctrlpts.append(pts)
else:
[(tmpx,tmpy), pts] = self._bezierArcSegmentCCW(cx,cy, rx,ry, a,b)
ctrlpts.append(pts)
return ((x0,y0), ctrlpts)
def addEllipsoidalArc(self, cx,cy, rx, ry, ang1, ang2):
"""adds an ellisesoidal arc segment to a path, with an ellipse centered
on cx,cy and with radii (major & minor axes) rx and ry. The arc is
drawn in the CCW direction. Requires: (ang2-ang1) > 0"""
((x0,y0), ctrlpts) = self.bezierArcCCW(cx,cy, rx,ry,ang1,ang2)
self.lineTo(x0,y0)
for ((x1,y1), (x2,y2),(x3,y3)) in ctrlpts:
self.curveTo(x1,y1,x2,y2,x3,y3)
def drawCentredString(self, x, y, text, text_anchor='middle'):
self.drawString(x,y,text, text_anchor=text_anchor)
def drawRightString(self, text, x, y):
self.drawString(text,x,y,text_anchor='end')
def drawString(self, x, y, text, _fontInfo=None, text_anchor='left'):
gs = self._gs
gs_fontSize = gs.fontSize
gs_fontName = gs.fontName
if _fontInfo and _fontInfo!=(gs_fontSize,gs_fontName):
fontName, fontSize = _fontInfo
_setFont(gs,fontName,fontSize)
else:
fontName = gs_fontName
fontSize = gs_fontSize
try:
if text_anchor in ('end','middle', 'end'):
textLen = stringWidth(text, fontName,fontSize)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen/2.
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,fontName,fontSize)
if self._backend=='rlPyCairo':
gs.drawString(x,y,text)
else:
font = getFont(fontName)
if font._dynamicFont:
gs.drawString(x,y,text)
else:
fc = font
if not isUnicode(text):
try:
text = text.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],text[i-10:i],text[i:j],text[j:j+10]),)))
FT = unicode2T1(text,[font]+font.substitutionFonts)
n = len(FT)
nm1 = n-1
for i in range(n):
f, t = FT[i]
if f!=fc:
_setFont(gs,f.fontName,fontSize)
fc = f
gs.drawString(x,y,t)
if i!=nm1:
x += f.stringWidth(t.decode(f.encName),fontSize)
finally:
gs.setFont(gs_fontName,gs_fontSize)
def line(self,x1,y1,x2,y2):
if self.strokeColor is not None:
self.pathBegin()
self.moveTo(x1,y1)
self.lineTo(x2,y2)
self.pathStroke()
def rect(self,x,y,width,height,stroke=1,fill=1):
self.pathBegin()
self.moveTo(x, y)
self.lineTo(x+width, y)
self.lineTo(x+width, y + height)
self.lineTo(x, y + height)
self.pathClose()
self.fillstrokepath(stroke=stroke,fill=fill)
def roundRect(self, x, y, width, height, rx,ry):
"""rect(self, x, y, width, height, rx,ry):
Draw a rectangle if rx or rx and ry are specified the corners are
rounded with ellipsoidal arcs determined by rx and ry
(drawn in the counter-clockwise direction)"""
if rx==0: rx = ry
if ry==0: ry = rx
x2 = x + width
y2 = y + height
self.pathBegin()
self.moveTo(x+rx,y)
self.addEllipsoidalArc(x2-rx, y+ry, rx, ry, 270, 360 )
self.addEllipsoidalArc(x2-rx, y2-ry, rx, ry, 0, 90)
self.addEllipsoidalArc(x+rx, y2-ry, rx, ry, 90, 180)
self.addEllipsoidalArc(x+rx, y+ry, rx, ry, 180, 270)
self.pathClose()
self.fillstrokepath()
def circle(self, cx, cy, r):
"add closed path circle with center cx,cy and axes r: counter-clockwise orientation"
self.ellipse(cx,cy,r,r)
def ellipse(self, cx,cy,rx,ry):
"""add closed path ellipse with center cx,cy and axes rx,ry: counter-clockwise orientation
(remember y-axis increases downward) """
self.pathBegin()
# first segment
x0 = cx + rx # (x0,y0) start pt
y0 = cy
x3 = cx # (x3,y3) end pt of arc
y3 = cy-ry
x1 = cx+rx
y1 = cy-ry*BEZIER_ARC_MAGIC
x2 = x3 + rx*BEZIER_ARC_MAGIC
y2 = y3
self.moveTo(x0, y0)
self.curveTo(x1,y1,x2,y2,x3,y3)
# next segment
x0 = x3
y0 = y3
x3 = cx-rx
y3 = cy
x1 = cx-rx*BEZIER_ARC_MAGIC
y1 = cy-ry
x2 = x3
y2 = cy- ry*BEZIER_ARC_MAGIC
self.curveTo(x1,y1,x2,y2,x3,y3)
# next segment
x0 = x3
y0 = y3
x3 = cx
y3 = cy+ry
x1 = cx-rx
y1 = cy+ry*BEZIER_ARC_MAGIC
x2 = cx -rx*BEZIER_ARC_MAGIC
y2 = cy+ry
self.curveTo(x1,y1,x2,y2,x3,y3)
#last segment
x0 = x3
y0 = y3
x3 = cx+rx
y3 = cy
x1 = cx+rx*BEZIER_ARC_MAGIC
y1 = cy+ry
x2 = cx+rx
y2 = cy+ry*BEZIER_ARC_MAGIC
self.curveTo(x1,y1,x2,y2,x3,y3)
self.pathClose()
def saveState(self):
'''do nothing for compatibility'''
pass
def setFillColor(self,aColor):
self.fillColor = Color2Hex(aColor)
alpha = getattr(aColor,'alpha',None)
if alpha is not None:
self.fillOpacity = alpha
def setStrokeColor(self,aColor):
self.strokeColor = Color2Hex(aColor)
alpha = getattr(aColor,'alpha',None)
if alpha is not None:
self.strokeOpacity = alpha
restoreState = saveState
# compatibility routines
def setLineCap(self,cap):
self.lineCap = cap
def setLineJoin(self,join):
self.lineJoin = join
def setLineWidth(self,width):
self.strokeWidth = width
def drawToPMCanvas(d, dpi=72, bg=0xffffff, configPIL=None, showBoundary=rl_config._unset_,backend=rl_config.renderPMBackend):
d = renderScaledDrawing(d)
c = PMCanvas(d.width, d.height, dpi=dpi, bg=bg, configPIL=configPIL, backend=backend)
draw(d, c, 0, 0, showBoundary=showBoundary)
return c
def drawToPIL(d, dpi=72, bg=0xffffff, configPIL=None, showBoundary=rl_config._unset_,backend=rl_config.renderPMBackend):
return drawToPMCanvas(d, dpi=dpi, bg=bg, configPIL=configPIL, showBoundary=showBoundary, backend=backend).toPIL()
def drawToPILP(d, dpi=72, bg=0xffffff, configPIL=None, showBoundary=rl_config._unset_,backend=rl_config.renderPMBackend):
Image = _getImage()
im = drawToPIL(d, dpi=dpi, bg=bg, configPIL=configPIL, showBoundary=showBoundary,backend=backend)
return im.convert("P", dither=Image.NONE, palette=Image.ADAPTIVE)
def drawToFile(d,fn,fmt='GIF', dpi=72, bg=0xffffff, configPIL=None, showBoundary=rl_config._unset_,backend=rl_config.renderPMBackend):
'''create a pixmap and draw drawing, d to it then save as a file
configPIL dict is passed to image save method'''
c = drawToPMCanvas(d, dpi=dpi, bg=bg, configPIL=configPIL, showBoundary=showBoundary,backend=backend)
c.saveToFile(fn,fmt)
def drawToString(d,fmt='GIF', dpi=72, bg=0xffffff, configPIL=None, showBoundary=rl_config._unset_,backend=rl_config.renderPMBackend):
s = BytesIO()
drawToFile(d,s,fmt=fmt, dpi=dpi, bg=bg, configPIL=configPIL,backend=backend)
return s.getvalue()
save = drawToFile
def test(outDir='pmout', shout=False):
def ext(x):
if x=='tiff': x='tif'
return x
#grab all drawings from the test module and write out.
#make a page of links in HTML to assist viewing.
import os
from reportlab.graphics import testshapes
from reportlab.rl_config import verbose
getAllTestDrawings = testshapes.getAllTestDrawings
drawings = []
if not os.path.isdir(outDir):
os.mkdir(outDir)
htmlTop = """<html><head><title>renderPM output results</title></head>
<body>
<h1>renderPM results of output</h1>
"""
htmlBottom = """</body>
</html>
"""
html = [htmlTop]
names = {}
argv = sys.argv[1:]
E = [a for a in argv if a.startswith('--ext=')]
if not E:
E = ['gif','tiff', 'png', 'jpg', 'pct', 'py', 'svg']
else:
for a in E:
argv.remove(a)
E = (','.join([a[6:] for a in E])).split(',')
errs = []
import traceback
from xml.sax.saxutils import escape
def handleError(name,fmt):
msg = 'Problem drawing %s fmt=%s file'%(name,fmt)
if shout or verbose>2: print(msg)
errs.append('<br/><h2 style="color:red">%s</h2>' % msg)
buf = StringIO()
traceback.print_exc(file=buf)
errs.append('<pre>%s</pre>' % escape(buf.getvalue()))
#print in a loop, with their doc strings
for (drawing, docstring, name) in getAllTestDrawings(doTTF=hasattr(_pmBackend,'ft_get_face')):
i = names[name] = names.setdefault(name,0)+1
if i>1: name += '.%02d' % (i-1)
if argv and name not in argv: continue
fnRoot = name
w = int(drawing.width)
h = int(drawing.height)
html.append('<hr><h2>Drawing %s</h2>\n<pre>%s</pre>' % (name, docstring))
for k in E:
if k in ['gif','png','jpg','pct']:
html.append('<p>%s format</p>\n' % k.upper())
try:
filename = '%s.%s' % (fnRoot, ext(k))
fullpath = os.path.join(outDir, filename)
if os.path.isfile(fullpath):
os.remove(fullpath)
if k=='pct':
from reportlab.lib.colors import white
drawToFile(drawing,fullpath,fmt=k,configPIL={'transparent':white})
elif k in ['py','svg']:
drawing.save(formats=['py','svg'],outDir=outDir,fnRoot=fnRoot)
else:
drawToFile(drawing,fullpath,fmt=k)
if k in ['gif','png','jpg']:
html.append('<img src="%s" border="1"><br>\n' % filename)
elif k=='py':
html.append('<a href="%s">python source</a><br>\n' % filename)
elif k=='svg':
html.append('<a href="%s">SVG</a><br>\n' % filename)
if shout or verbose>2: print('wrote %s'%ascii(fullpath))
except AttributeError:
handleError(name,k)
if os.environ.get('RL_NOEPSPREVIEW','0')=='1': drawing.__dict__['preview'] = 0
for k in ('eps', 'pdf'):
try:
drawing.save(formats=[k],outDir=outDir,fnRoot=fnRoot)
except:
handleError(name,k)
if errs:
html[0] = html[0].replace('</h1>',' <a href="#errors" style="color: red">(errors)</a></h1>')
html.append('<a name="errors"/>')
html.extend(errs)
html.append(htmlBottom)
htmlFileName = os.path.join(outDir, 'pm-index.html')
with open(htmlFileName, 'w') as f:
f.writelines(html)
if sys.platform=='mac':
from reportlab.lib.utils import markfilename
markfilename(htmlFileName,ext='HTML')
if shout or verbose>2: print('wrote %s' % htmlFileName)
if __name__=='__main__':
test(shout=True)
Mini Shell