Initial commit: IT Site Survey AI v2 with all features
This commit is contained in:
BeawIT Admin
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__all__ = (
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'setFont',
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'pathNumTrunc',
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'processGlyph',
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'text2PathDescription',
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'text2Path',
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'RenderPMError',
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)
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from reportlab.pdfbase.pdfmetrics import getFont, unicode2T1, stringWidth
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from reportlab.pdfbase.ttfonts import ShapedStr
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from reportlab.lib.utils import open_and_read, isBytes, rl_exec
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from .shapes import _baseGFontName, _PATH_OP_ARG_COUNT, _PATH_OP_NAMES, definePath
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from sys import exc_info
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class RenderPMError(Exception):
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pass
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def _errorDump(fontName, fontSize):
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s1, s2 = list(map(str,exc_info()[:2]))
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from reportlab import rl_config
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if rl_config.verbose>=2:
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import os
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_ = os.path.join(os.path.dirname(rl_config.__file__),'fonts')
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print('!!!!! %s: %s' % (_,os.listdir(_)))
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for _ in ('T1SearchPath','TTFSearchPath'):
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print('!!!!! rl_config.%s = %s' % (_,repr(getattr(rl_config,_))))
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code = 'raise RenderPMError("Error in setFont(%s,%s) missing the T1 files?\\nOriginally %s: %s")' % (repr(fontName),repr(fontSize),s1,s2)
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code += ' from None'
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rl_exec(code,dict(RenderPMError=RenderPMError))
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def setFont(gs,fontName,fontSize):
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try:
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gs.setFont(fontName,fontSize)
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except ValueError as e:
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_errorDump(fontName,fontSize)
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#old code that used makeT1Font
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#if not e.args[0].endswith("Can't find font!"):
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# _errorDump(fontName,fontSize)
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#here's where we try to add a font to the canvas
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#from _rl_renderPM import makeT1Font
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#try:
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# f = getFont(fontName)
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# makeT1Font(fontName,f.face.findT1File(),f.encoding.vector,open_and_read)
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#except:
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# _errorDump(fontName,fontSize)
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#gs.setFont(fontName,fontSize)
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def pathNumTrunc(n):
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if int(n)==n: return int(n)
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return round(n,5)
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def __makeTextPathsCode__(tp=None, _TP = ('freetype',)):
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from reportlab.rl_config import textPaths, renderPMBackend
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if tp is not None: textPaths = tp
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if textPaths=='backend':
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tp = 'freetype'
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elif textPaths in _TP:
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tp = textPaths
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else:
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raise ValueError(f"textPaths={textPaths!r} should be one of 'backend', 'freetype')")
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TP = (tp,) + tuple((_ for _ in _TP if _!=tp))
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for tp in TP:
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if tp=='freetype':
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try:
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import freetype
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except ImportError:
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continue
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import io
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class FTTextPath:
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ftLFlags = freetype.FT_LOAD_DEFAULT | freetype.FT_LOAD_NO_SCALE | freetype.FT_LOAD_NO_BITMAP
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def __init__(self):
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self.faces = {}
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def setFont(self,fontName):
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if fontName not in self.faces:
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font = getFont(fontName)
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if not font:
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raise ValueError(f'font {fontName!r} has not been registered')
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if font._dynamicFont:
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path_or_stream = font.face._ttf_data
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#path_or_stream = getattr(font,'_ttfont_data',None)
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#if not path_or_stream:
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#path_or_stream = font._ttfont_data
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path_or_stream = io.BytesIO(path_or_stream)
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else:
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path_or_stream = getattr(font.face,'pfbFileName',None)
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if not path_or_stream:
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path_or_stream = font.face.findT1File()
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face = freetype.Face(path_or_stream)
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self.faces[fontName] = (face,font)
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return self.faces[fontName]
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def move_to(self, a, ctx):
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if self.P: self.P_append(('closePath',))
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self.P_append(('moveTo',self.xpt(a.x),self.ypt(a.y)))
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def line_to(self, a, ctx):
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self.P_append(('lineTo',self.xpt(a.x),self.ypt(a.y)))
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def conic_to(self, a, b, ctx):
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'''using the cubic equivalent'''
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x0,y0 = self.P[-1][-2:] if self.P else (a.x, a.y)
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x1 = self.xpt(a.x)
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y1 = self.ypt(a.y)
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x2 = self.xpt(b.x)
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y2 = self.ypt(b.y)
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self.P_append(('curveTo',x0+((x1-x0)*2)/3,y0+((y1-y0)*2)/3,x1+(x2-x1)/3,y1+(y2-y1)/3,x2,y2))
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def cubic_to(self, a, b, c, ctx):
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self.P_append(('curveTo',self.xpt(a.x),self.ypt(a.y),self.xpt(b.x),self.ypt(b.y),self.xpt(c.x),self.ypt(c.y)))
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def close_path(self,ctx=None):
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self.P.append(('closePath',))
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def _text2Path(self, text, x=0, y=0, fontName=_baseGFontName, fontSize=1000, **kwds):
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face, font = self.setFont(fontName)
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scale = fontSize/face.units_per_EM #font scaling
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__dx__ = x/scale
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__dy__ = y/scale
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self.P = []
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self.P_append = self.P.append
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truncate = kwds.pop('truncate',0)
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if truncate:
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self.xpt = lambda x: pathNumTrunc(scale*(x+__dx__))
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self.ypt = lambda y: pathNumTrunc(scale*(y+__dy__))
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else:
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self.xpt = lambda x: scale*(x + __dx__)
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self.ypt = lambda y: scale*(y + __dy__)
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lineHeight = fontSize*1.2/scale
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ftLFlags = self.ftLFlags
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if isinstance(text,ShapedStr):
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sdata = text.__shapeData__
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dscale = face.units_per_EM / 1000
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fontC2G = font.face.charToGlyph
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else:
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sdata = None
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for i,c in enumerate(text):
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if c=='\n':
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__dx__ = 0
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__dy__ -= lineHeight
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continue
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if sdata:
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sd = sdata[i]
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sdx_offset = sd.x_offset*dscale
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sdy_offset = sd.y_offset*dscale
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__dx__ += sdx_offset
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__dy__ += sdy_offset
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face.load_glyph(fontC2G[ord(c)],ftLFlags)
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else:
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face.load_char(c, ftLFlags)
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face.glyph.outline.decompose(self, move_to=self.move_to, line_to=self.line_to, conic_to=self.conic_to, cubic_to=self.cubic_to)
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if sdata:
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__dx__ -= sdx_offset
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__dy__ -= sdy_offset
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__dx__ += sd.x_advance*dscale if sdata else face.glyph.metrics.horiAdvance
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if self.P: self.P_append(('closePath',))
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return self.P
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def text2PathDescription(text, x=0, y=0, fontName=_baseGFontName, fontSize=1000,
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anchor='start', truncate=1, pathReverse=0, gs=None):
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'''freetype text2PathDescription(text, x=0, y=0, fontName='fontname',
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fontSize=1000, font = 'fontName',
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anchor='start', truncate=1, pathReverse=0, gs=None)
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'''
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font = getFont(fontName)
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if font._multiByte and not font._dynamicFont:
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raise ValueError("text2PathDescription doesn't support multi byte fonts like %r" % fontName)
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P_extend = [].extend
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if not anchor=='start':
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textLen = stringWidth(text, fontName, fontSize)
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if anchor=='end':
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x = x-textLen
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elif anchor=='middle':
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x = x - textLen/2.
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if gs is None:
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gs = FTTextPath()
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if font._dynamicFont:
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P_extend(gs._text2Path(text,x=x,y=y,fontName=fontName,fontSize=fontSize, truncate=truncate,pathReverse=pathReverse))
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else:
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if isBytes(text):
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try:
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text = text.decode('utf8')
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except UnicodeDecodeError as e:
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i,j = e.args[2:4]
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raise UnicodeDecodeError(*(e.args[:4]+('%s\n%s-->%s<--%s' % (e.args[4],text[max(i-10,0):i],text[i:j],text[j:j+10]),)))
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FT = unicode2T1(text,[font]+font.substitutionFonts)
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nm1 = len(FT)-1
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for i, (f, t) in enumerate(FT):
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if isinstance(t,bytes): t = t.decode(f.encName)
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P_extend(gs._text2Path(t,x=x,y=y,fontName=f.fontName,fontSize=fontSize, truncate=truncate,pathReverse=pathReverse))
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if i!=nm1:
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x += f.stringWidth(t, fontSize)
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return P_extend.__self__
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return dict(text2PathDescription=text2PathDescription,FTTextPath=FTTextPath)
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else:
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def _(*args,**kwds):
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raise RuntimeError(f'''This installation of reportLab has lacks PYCAIRO extra.
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It cannot create paths from text.
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Could not create text2PathDescription for using backends from {TP!a}''')
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return dict(processGlyph=_,setFont=_,FTTextPath=_,text2PathDescription=_)
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globals().update(__makeTextPathsCode__())
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def text2Path(text, x=0, y=0, fontName=_baseGFontName, fontSize=1000,
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anchor='start', truncate=1, pathReverse=0, gs=None, **kwds):
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t2pd = kwds.pop('text2PathDescription',text2PathDescription)
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return definePath(t2pd(text,x=x,y=y,fontName=fontName,
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fontSize=fontSize,anchor=anchor,truncate=truncate,pathReverse=pathReverse, gs=gs),**kwds)
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