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394 lines
20 KiB
394 lines
20 KiB
# coding=utf-8
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'''
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Copyright (C) 2008 Aaron Spike, aaron@ekips.org
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Copyright (C) 2013 Sebastian Wüst, sebi@timewaster.de
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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'''
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# standard libraries
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import math
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import re
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import sys
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sys.path.append('/usr/share/inkscape/extensions')
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# local libraries
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import cspsubdiv
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import cubicsuperpath
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import inkex
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import simplestyle
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import simpletransform
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class hpglMultipenEncoder:
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PI = math.pi
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TWO_PI = PI * 2
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def __init__(self, effect):
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''' options:
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"resolutionX":float
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"resolutionY":float
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"pen":int
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"force:int
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"speed:int
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"orientation":string // "0", "90", "-90", "180"
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"mirrorX":bool
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"mirrorY":bool
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"center":bool
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"flat":float
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"overcut":float
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"toolOffset":float
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"precut":bool
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"autoAlign":bool
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"debug":bool
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'''
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self.options = effect.options
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self.doc = effect.document.getroot()
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self.docWidth = effect.unittouu(self.doc.get('width'))
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self.docHeight = effect.unittouu(self.doc.get('height'))
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self.hpgl = ''
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self.divergenceX = 'False'
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self.divergenceY = 'False'
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self.sizeX = 'False'
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self.sizeY = 'False'
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self.dryRun = True
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self.lastPoint = [0, 0, 0]
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self.lastPen = -1
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self.offsetX = 0
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self.offsetY = 0
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self.penIndex = {}
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self.penCount = self.options.penCount
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self.scaleX = self.options.resolutionX / effect.unittouu("1.0in") # dots per inch to dots per user unit
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self.scaleY = self.options.resolutionY / effect.unittouu("1.0in") # dots per inch to dots per user unit
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scaleXY = (self.scaleX + self.scaleY) / 2
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self.overcut = effect.unittouu(str(self.options.overcut) + "mm") * scaleXY # mm to dots (plotter coordinate system)
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self.toolOffset = effect.unittouu(str(self.options.toolOffset) + "mm") * scaleXY # mm to dots
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self.flat = self.options.flat / (1016 / ((self.options.resolutionX + self.options.resolutionY) / 2)) # scale flatness to resolution
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if self.toolOffset > 0.0:
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self.toolOffsetFlat = self.flat / self.toolOffset * 4.5 # scale flatness to offset
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else:
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self.toolOffsetFlat = 0.0
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self.mirrorX = 1.0
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if self.options.mirrorX:
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self.mirrorX = -1.0
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self.mirrorY = -1.0
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if self.options.mirrorY:
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self.mirrorY = 1.0
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if self.options.debug:
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self.debugValues = {}
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self.debugValues['docWidth'] = self.docWidth
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self.debugValues['docHeight'] = self.docHeight
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# process viewBox attribute to correct page scaling
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self.viewBoxTransformX = 1
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self.viewBoxTransformY = 1
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if self.options.debug:
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self.debugValues['viewBoxWidth'] = "-"
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self.debugValues['viewBoxHeight'] = "-"
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viewBox = self.doc.get('viewBox')
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if viewBox:
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viewBox2 = viewBox.split(',')
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if len(viewBox2) < 4:
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viewBox2 = viewBox.split(' ')
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if self.options.debug:
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self.debugValues['viewBoxWidth'] = viewBox2[2]
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self.debugValues['viewBoxHeight'] = viewBox2[3]
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self.viewBoxTransformX = self.docWidth / effect.unittouu(effect.addDocumentUnit(viewBox2[2]))
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self.viewBoxTransformY = self.docHeight / effect.unittouu(effect.addDocumentUnit(viewBox2[3]))
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def getHpgl(self):
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# dryRun to find edges
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groupmat = [[self.mirrorX * self.scaleX * self.viewBoxTransformX, 0.0, 0.0], [0.0, self.mirrorY * self.scaleY * self.viewBoxTransformY, 0.0]]
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groupmat = simpletransform.composeTransform(groupmat, simpletransform.parseTransform('rotate(' + self.options.orientation + ')'))
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self.vData = [['', 'False', 0, 0], ['', 'False', 0, 0], ['', 'False', 0, 0], ['', 'False', 0, 0]]
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self.processGroups(self.doc, groupmat)
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if self.divergenceX == 'False' or self.divergenceY == 'False' or self.sizeX == 'False' or self.sizeY == 'False':
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raise Exception('NO_PATHS')
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# live run
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self.dryRun = False
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if self.options.debug:
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self.debugValues['drawingWidth'] = self.sizeX - self.divergenceX
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self.debugValues['drawingHeight'] = self.sizeY - self.divergenceY
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self.debugValues['drawingWidthUU'] = self.debugValues['drawingWidth'] / self.scaleX
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self.debugValues['drawingHeightUU'] = self.debugValues['drawingHeight'] / self.scaleY
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# move drawing according to various modifiers
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if self.options.autoAlign:
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if self.options.center:
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self.offsetX -= (self.sizeX - self.divergenceX) / 2
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self.offsetY -= (self.sizeY - self.divergenceY) / 2
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else:
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self.divergenceX = 0.0
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self.divergenceY = 0.0
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if self.options.center:
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if self.options.orientation == '0':
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self.offsetX -= (self.docWidth * self.scaleX) / 2
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self.offsetY += (self.docHeight * self.scaleY) / 2
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if self.options.orientation == '90':
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self.offsetY += (self.docWidth * self.scaleX) / 2
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self.offsetX += (self.docHeight * self.scaleY) / 2
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if self.options.orientation == '180':
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self.offsetX += (self.docWidth * self.scaleX) / 2
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self.offsetY -= (self.docHeight * self.scaleY) / 2
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if self.options.orientation == '270':
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self.offsetY -= (self.docWidth * self.scaleX) / 2
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self.offsetX -= (self.docHeight * self.scaleY) / 2
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else:
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if self.options.orientation == '0':
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self.offsetY += self.docHeight * self.scaleY
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if self.options.orientation == '90':
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self.offsetY += self.docWidth * self.scaleX
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self.offsetX += self.docHeight * self.scaleY
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if self.options.orientation == '180':
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self.offsetX += self.docWidth * self.scaleX
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if not self.options.center and self.toolOffset > 0.0:
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self.offsetX += self.toolOffset
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self.offsetY += self.toolOffset
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# initialize transformation matrix and cache
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groupmat = [[self.mirrorX * self.scaleX * self.viewBoxTransformX, 0.0, -self.divergenceX + self.offsetX],
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[0.0, self.mirrorY * self.scaleY * self.viewBoxTransformY, -self.divergenceY + self.offsetY]]
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groupmat = simpletransform.composeTransform(groupmat, simpletransform.parseTransform('rotate(' + self.options.orientation + ')'))
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self.vData = [['', 'False', 0, 0], ['', 'False', 0, 0], ['', 'False', 0, 0], ['', 'False', 0, 0]]
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# add move to zero point and precut
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if self.toolOffset > 0.0 and self.options.precut:
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if self.options.center:
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# position precut outside of drawing plus one time the tooloffset
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if self.offsetX >= 0.0:
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precutX = self.offsetX + self.toolOffset
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else:
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precutX = self.offsetX - self.toolOffset
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if self.offsetY >= 0.0:
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precutY = self.offsetY + self.toolOffset
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else:
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precutY = self.offsetY - self.toolOffset
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self.processOffset('PU', precutX, precutY, self.options.pen)
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self.processOffset('PD', precutX, precutY + self.toolOffset * 8, self.options.pen)
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else:
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self.processOffset('PU', 0, 0, self.options.pen)
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self.processOffset('PD', 0, self.toolOffset * 8, self.options.pen)
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# start conversion
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self.processGroups(self.doc, groupmat)
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# shift an empty node in in order to process last node in cache
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if self.toolOffset > 0.0 and not self.dryRun:
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self.processOffset('PU', 0, 0, 0)
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if self.options.debug:
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return self.hpgl, self
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else:
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return self.hpgl, ""
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def processGroups(self, doc, groupmat):
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# flatten layers and groups to avoid recursion
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paths = []
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for node in doc:
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if (node.tag == inkex.addNS('g', 'svg') and self.isGroupVisible(node)) or node.tag == inkex.addNS('path', 'svg'):
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paths.append([node.tag, node, self.mergeTransform(node, groupmat), self.getPenNumber(node)])
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doc = ''
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hasGroups = True
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while hasGroups:
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hasGroups = False
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for i, elm in enumerate(paths):
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if paths[i][0] == inkex.addNS('g', 'svg') and self.isGroupVisible(paths[i][1]):
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hasGroups = True
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for path in paths[i][1]:
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if (path.tag == inkex.addNS('g', 'svg') and self.isGroupVisible(path)) or path.tag == inkex.addNS('path', 'svg'):
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paths.insert(i + 1, [path.tag, path, self.mergeTransform(path, paths[i][2]), paths[i][3]])
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paths[i][0] = ''
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for node in paths:
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if node[0] == inkex.addNS('path', 'svg'):
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self.processPath(node[1], node[2], node[3])
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def getPenNumber(self, doc):
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penNum = str(doc.get('{' + inkex.NSS['inkscape'] + '}label')).lower().strip(' \t\n\r')
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if re.search(r'( |\A)pen *\d+( |\Z)', penNum):
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penNum = re.sub(r'(.* |\A)pen *(\d+)( .*|\Z)', r'\2', penNum, 1)
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return int(penNum)
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else:
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style = doc.get('style')
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style = simplestyle.parseStyle(style)
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if 'stroke' in style and style['stroke'] != 'none':
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color = style['stroke']
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elif 'fill' in style and style['fill'] != 'none':
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color = style['fill']
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else:
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return None
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if not self.penIndex.has_key(color):
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penNum = (len(self.penIndex) + 1) % self.penCount
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self.penIndex[color] = self.penCount if penNum == 0 else penNum
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return self.penIndex[color]
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# return self.options.pen
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def mergeTransform(self, doc, matrix):
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# get and merge two matrixes into one
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trans = doc.get('transform')
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if trans:
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return simpletransform.composeTransform(matrix, simpletransform.parseTransform(trans))
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else:
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return matrix
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def isGroupVisible(self, group):
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style = group.get('style')
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if style:
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style = simplestyle.parseStyle(style)
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if 'display' in style and style['display'] == 'none':
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return False
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return True
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def processPath(self, node, mat, pen):
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# process path
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path = node.get('d')
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if path:
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# parse and transform path
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path = cubicsuperpath.parsePath(path)
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simpletransform.applyTransformToPath(mat, path)
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cspsubdiv.cspsubdiv(path, self.flat)
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# path to HPGL commands
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oldPosX = 0.0
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oldPosY = 0.0
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for singlePath in path:
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cmd = 'PU'
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for singlePathPoint in singlePath:
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posX, posY = singlePathPoint[1]
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# check if point is repeating, if so, ignore
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if int(round(posX)) != int(round(oldPosX)) or int(round(posY)) != int(round(oldPosY)):
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self.processOffset(cmd, posX, posY, pen)
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cmd = 'PD'
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oldPosX = posX
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oldPosY = posY
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# perform overcut
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if self.overcut > 0.0 and not self.dryRun:
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# check if last and first points are the same, otherwise the path is not closed and no overcut can be performed
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if int(round(oldPosX)) == int(round(singlePath[0][1][0])) and int(round(oldPosY)) == int(round(singlePath[0][1][1])):
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overcutLength = 0
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for singlePathPoint in singlePath:
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posX, posY = singlePathPoint[1]
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# check if point is repeating, if so, ignore
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if int(round(posX)) != int(round(oldPosX)) or int(round(posY)) != int(round(oldPosY)):
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overcutLength += self.getLength(oldPosX, oldPosY, posX, posY)
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if overcutLength >= self.overcut:
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newLength = self.changeLength(oldPosX, oldPosY, posX, posY, - (overcutLength - self.overcut))
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self.processOffset(cmd, newLength[0], newLength[1], pen)
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break
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else:
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self.processOffset(cmd, posX, posY, pen)
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oldPosX = posX
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oldPosY = posY
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def getLength(self, x1, y1, x2, y2, absolute=True):
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# calc absoulute or relative length between two points
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length = math.sqrt((x2 - x1) ** 2.0 + (y2 - y1) ** 2.0)
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if absolute:
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length = math.fabs(length)
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return length
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def changeLength(self, x1, y1, x2, y2, offset):
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# change length of line
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if offset < 0:
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offset = max( - self.getLength(x1, y1, x2, y2), offset)
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x = x2 + (x2 - x1) / self.getLength(x1, y1, x2, y2, False) * offset
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y = y2 + (y2 - y1) / self.getLength(x1, y1, x2, y2, False) * offset
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return [x, y]
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def processOffset(self, cmd, posX, posY, pen):
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# calculate offset correction (or dont)
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if self.toolOffset == 0.0 or self.dryRun:
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self.storePoint(cmd, posX, posY, pen)
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else:
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# insert data into cache
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self.vData.pop(0)
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self.vData.insert(3, [cmd, posX, posY, pen])
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# decide if enough data is availabe
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if self.vData[2][1] != 'False':
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if self.vData[1][1] == 'False':
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self.storePoint(self.vData[2][0], self.vData[2][1], self.vData[2][2], self.vData[2][3])
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else:
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# perform tool offset correction (It's a *tad* complicated, if you want to understand it draw the data as lines on paper)
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if self.vData[2][0] == 'PD': # If the 3rd entry in the cache is a pen down command make the line longer by the tool offset
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pointThree = self.changeLength(self.vData[1][1], self.vData[1][2], self.vData[2][1], self.vData[2][2], self.toolOffset)
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self.storePoint('PD', pointThree[0], pointThree[1], self.vData[2][3])
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elif self.vData[0][1] != 'False':
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# Elif the 1st entry in the cache is filled with data and the 3rd entry is a pen up command shift
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# the 3rd entry by the current tool offset position according to the 2nd command
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pointThree = self.changeLength(self.vData[0][1], self.vData[0][2], self.vData[1][1], self.vData[1][2], self.toolOffset)
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pointThree[0] = self.vData[2][1] - (self.vData[1][1] - pointThree[0])
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pointThree[1] = self.vData[2][2] - (self.vData[1][2] - pointThree[1])
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self.storePoint('PU', pointThree[0], pointThree[1], self.vData[2][3])
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else:
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# Else just write the 3rd entry
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pointThree = [self.vData[2][1], self.vData[2][2]]
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self.storePoint('PU', pointThree[0], pointThree[1], self.vData[2][3])
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if self.vData[3][0] == 'PD':
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# If the 4th entry in the cache is a pen down command guide tool to next line with a circle between the prolonged 3rd and 4th entry
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if self.getLength(self.vData[2][1], self.vData[2][2], self.vData[3][1], self.vData[3][2]) >= self.toolOffset:
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pointFour = self.changeLength(self.vData[3][1], self.vData[3][2], self.vData[2][1], self.vData[2][2], - self.toolOffset)
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else:
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pointFour = self.changeLength(self.vData[2][1], self.vData[2][2], self.vData[3][1], self.vData[3][2],
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(self.toolOffset - self.getLength(self.vData[2][1], self.vData[2][2], self.vData[3][1], self.vData[3][2])))
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# get angle start and angle vector
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angleStart = math.atan2(pointThree[1] - self.vData[2][2], pointThree[0] - self.vData[2][1])
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angleVector = math.atan2(pointFour[1] - self.vData[2][2], pointFour[0] - self.vData[2][1]) - angleStart
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# switch direction when arc is bigger than 180°
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if angleVector > self.PI:
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angleVector -= self.TWO_PI
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elif angleVector < - self.PI:
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angleVector += self.TWO_PI
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# draw arc
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if angleVector >= 0:
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angle = angleStart + self.toolOffsetFlat
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while angle < angleStart + angleVector:
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self.storePoint('PD', self.vData[2][1] + math.cos(angle) * self.toolOffset, self.vData[2][2] + math.sin(angle) * self.toolOffset, self.vData[2][3])
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angle += self.toolOffsetFlat
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else:
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angle = angleStart - self.toolOffsetFlat
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while angle > angleStart + angleVector:
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self.storePoint('PD', self.vData[2][1] + math.cos(angle) * self.toolOffset, self.vData[2][2] + math.sin(angle) * self.toolOffset, self.vData[2][3])
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angle -= self.toolOffsetFlat
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self.storePoint('PD', pointFour[0], pointFour[1], self.vData[3][3])
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def storePoint(self, command, x, y, pen):
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x = int(round(x))
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y = int(round(y))
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# skip when no change in movement
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if self.lastPoint[0] == command and self.lastPoint[1] == x and self.lastPoint[2] == y:
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return
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if self.dryRun:
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# find edges
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if self.divergenceX == 'False' or x < self.divergenceX:
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self.divergenceX = x
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if self.divergenceY == 'False' or y < self.divergenceY:
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self.divergenceY = y
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if self.sizeX == 'False' or x > self.sizeX:
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self.sizeX = x
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if self.sizeY == 'False' or y > self.sizeY:
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self.sizeY = y
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else:
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# store point
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if not self.options.center:
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# only positive values are allowed (usually)
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if x < 0:
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x = 0
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if y < 0:
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y = 0
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# select correct pen
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if self.lastPen != pen:
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self.hpgl += ';SP%d' % pen
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# do not repeat command
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if command == 'PD' and self.lastPoint[0] == 'PD' and self.lastPen == pen:
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self.hpgl += ',%d,%d' % (x, y)
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else:
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self.hpgl += ';%s%d,%d' % (command, x, y)
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self.lastPen = pen
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self.lastPoint = [command, x, y]
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# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
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