8f69c1dfa2
This fixes the exception referenced in #12. Still need to add rendering code for rectangle aperture lines and arcs. Rectangle strokes will be drawn as polygons by the rendering backends.
116 lines
4.6 KiB
Python
116 lines
4.6 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 = 400.
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class GerberCairoContext(GerberContext):
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def __init__(self, surface=None, size=(1000, 1000)):
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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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xbounds, ybounds = bounds
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self.ctx.rectangle(SCALE * xbounds[0], SCALE * ybounds[0], SCALE * (xbounds[1]- xbounds[0]), SCALE * (ybounds[1] - ybounds[0]))
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self.ctx.set_source_rgb(0,0,0)
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self.ctx.fill()
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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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# TODO: Render rectangle strokes as a polygon...
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pass
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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.width if arc.width != 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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