130 lines
5.3 KiB
Python
130 lines
5.3 KiB
Python
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from .render import GerberContext
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from operator import mul
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import cairocffi as cairo
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import math
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from ..primitives import *
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SCALE = 4000.
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class GerberCairoContext(GerberContext):
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def __init__(self, surface=None, size=(10000, 10000)):
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GerberContext.__init__(self)
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if surface is None:
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self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
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size[0], size[1])
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else:
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self.surface = surface
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self.ctx = cairo.Context(self.surface)
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self.size = size
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self.ctx.translate(0, self.size[1])
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self.scale = (SCALE,SCALE)
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self.ctx.scale(1, -1)
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self.apertures = {}
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self.background = False
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def set_bounds(self, bounds):
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if not self.background:
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xbounds, ybounds = bounds
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width = SCALE * (xbounds[1] - xbounds[0])
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height = SCALE * (ybounds[1] - ybounds[0])
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self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, int(width), int(height))
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self.ctx = cairo.Context(self.surface)
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self.ctx.translate(0, height)
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self.scale = (SCALE,SCALE)
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self.ctx.scale(1, -1)
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self.ctx.rectangle(SCALE * xbounds[0], SCALE * ybounds[0], width, height)
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self.ctx.set_source_rgb(0,0,0)
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self.ctx.fill()
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self.background = True
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def _render_line(self, line, color):
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start = map(mul, line.start, self.scale)
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end = map(mul, line.end, self.scale)
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if isinstance(line.aperture, Circle):
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width = line.aperture.diameter if line.aperture.diameter != 0 else 0.001
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_line_width(width * SCALE)
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self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
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self.ctx.move_to(*start)
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self.ctx.line_to(*end)
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self.ctx.stroke()
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elif isinstance(line.aperture, Rectangle):
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points = [tuple(map(mul, x, self.scale)) for x in line.vertices]
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_line_width(0)
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self.ctx.move_to(*points[0])
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for point in points[1:]:
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self.ctx.line_to(*point)
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self.ctx.fill()
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def _render_arc(self, arc, color):
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center = map(mul, arc.center, self.scale)
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start = map(mul, arc.start, self.scale)
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end = map(mul, arc.end, self.scale)
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radius = SCALE * arc.radius
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angle1 = arc.start_angle
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angle2 = arc.end_angle
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width = arc.aperture.diameter if arc.aperture.diameter != 0 else 0.001
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_line_width(width * SCALE)
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self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
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self.ctx.move_to(*start) # You actually have to do this...
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if arc.direction == 'counterclockwise':
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self.ctx.arc(*center, radius=radius, angle1=angle1, angle2=angle2)
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else:
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self.ctx.arc_negative(*center, radius=radius, angle1=angle1, angle2=angle2)
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self.ctx.move_to(*end) # ...lame
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def _render_region(self, region, color):
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points = [tuple(map(mul, point, self.scale)) for point in region.points]
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_line_width(0)
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self.ctx.move_to(*points[0])
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for point in points[1:]:
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self.ctx.line_to(*point)
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self.ctx.fill()
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def _render_circle(self, circle, color):
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center = map(mul, circle.position, self.scale)
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_line_width(0)
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self.ctx.arc(*center, radius=circle.radius * SCALE, angle1=0, angle2=2 * math.pi)
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self.ctx.fill()
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def _render_rectangle(self, rectangle, color):
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ll = map(mul, rectangle.lower_left, self.scale)
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width, height = tuple(map(mul, (rectangle.width, rectangle.height), map(abs, self.scale)))
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_line_width(0)
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self.ctx.rectangle(*ll,width=width, height=height)
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self.ctx.fill()
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def _render_obround(self, obround, color):
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self._render_circle(obround.subshapes['circle1'], color)
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self._render_circle(obround.subshapes['circle2'], color)
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self._render_rectangle(obround.subshapes['rectangle'], color)
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def _render_drill(self, circle, color):
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self._render_circle(circle, color)
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def dump(self, filename):
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self.surface.write_to_png(filename)
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