227 lines
10 KiB
Python
227 lines
10 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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import cairocffi as cairo
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from operator import mul
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import math
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import tempfile
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from ..primitives import *
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class GerberCairoContext(GerberContext):
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def __init__(self, scale=300):
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GerberContext.__init__(self)
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self.scale = (scale, scale)
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self.surface = None
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self.ctx = None
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self.bg = False
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self.mask = None
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self.mask_ctx = None
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self.origin_in_pixels = None
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self.size_in_pixels = None
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def set_bounds(self, bounds):
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origin_in_inch = (bounds[0][0], bounds[1][0])
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size_in_inch = (abs(bounds[0][1] - bounds[0][0]), abs(bounds[1][1] - bounds[1][0]))
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size_in_pixels = map(mul, size_in_inch, self.scale)
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self.origin_in_pixels = tuple(map(mul, origin_in_inch, self.scale)) if self.origin_in_pixels is None else self.origin_in_pixels
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self.size_in_pixels = size_in_pixels if self.size_in_pixels is None else self.size_in_pixels
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if self.surface is None:
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self.surface_buffer = tempfile.NamedTemporaryFile()
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self.surface = cairo.SVGSurface(self.surface_buffer, size_in_pixels[0], size_in_pixels[1])
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self.ctx = cairo.Context(self.surface)
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self.ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
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self.ctx.scale(1, -1)
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self.ctx.translate(-(origin_in_inch[0] * self.scale[0]), (-origin_in_inch[1]*self.scale[0]) - size_in_pixels[1])
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self.mask_buffer = tempfile.NamedTemporaryFile()
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self.mask = cairo.SVGSurface(self.mask_buffer, size_in_pixels[0], size_in_pixels[1])
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self.mask_ctx = cairo.Context(self.mask)
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self.mask_ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
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self.mask_ctx.scale(1, -1)
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self.mask_ctx.translate(-(origin_in_inch[0] * self.scale[0]), (-origin_in_inch[1]*self.scale[0]) - size_in_pixels[1])
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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 not self.invert:
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_operator(cairo.OPERATOR_OVER if (line.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
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if isinstance(line.aperture, Circle):
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width = line.aperture.diameter
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self.ctx.set_line_width(width * self.scale[0])
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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_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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else:
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self.mask_ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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self.mask_ctx.set_operator(cairo.OPERATOR_CLEAR)
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if isinstance(line.aperture, Circle):
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width = line.aperture.diameter
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self.mask_ctx.set_line_width(0)
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self.mask_ctx.set_line_width(width * self.scale[0])
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self.mask_ctx.set_line_cap(cairo.LINE_CAP_ROUND)
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self.mask_ctx.move_to(*start)
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self.mask_ctx.line_to(*end)
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self.mask_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.mask_ctx.set_line_width(0)
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self.mask_ctx.move_to(*points[0])
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for point in points[1:]:
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self.mask_ctx.line_to(*point)
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self.mask_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 = self.scale[0] * 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_operator(cairo.OPERATOR_OVER if (arc.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
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self.ctx.set_line_width(width * self.scale[0])
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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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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_operator(cairo.OPERATOR_OVER if (region.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
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self.ctx.set_line_width(0)
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self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
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self.ctx.move_to(*tuple(map(mul, region.primitives[0].start, self.scale)))
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for p in region.primitives:
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if isinstance(p, Line):
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self.ctx.line_to(*tuple(map(mul, p.end, self.scale)))
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else:
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center = map(mul, p.center, self.scale)
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start = map(mul, p.start, self.scale)
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end = map(mul, p.end, self.scale)
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radius = self.scale[0] * p.radius
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angle1 = p.start_angle
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angle2 = p.end_angle
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if p.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.fill()
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def _render_circle(self, circle, color):
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center = tuple(map(mul, circle.position, self.scale))
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if not self.invert:
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_operator(cairo.OPERATOR_OVER if (circle.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
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self.ctx.set_line_width(0)
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self.ctx.arc(*center, radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi)
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self.ctx.fill()
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else:
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self.mask_ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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self.mask_ctx.set_operator(cairo.OPERATOR_CLEAR)
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self.mask_ctx.set_line_width(0)
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self.mask_ctx.arc(*center, radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi)
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self.mask_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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if not self.invert:
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self.ctx.set_source_rgba(*color, alpha=self.alpha)
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self.ctx.set_operator(cairo.OPERATOR_OVER if (rectangle.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
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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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else:
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self.mask_ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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self.mask_ctx.set_operator(cairo.OPERATOR_CLEAR)
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self.mask_ctx.set_line_width(0)
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self.mask_ctx.rectangle(*ll, width=width, height=height)
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self.mask_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 _render_test_record(self, primitive, color):
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self.ctx.select_font_face('monospace', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL)
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self.ctx.set_font_size(200)
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self._render_circle(Circle(primitive.position, 0.01), color)
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self.ctx.set_source_rgb(*color)
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self.ctx.set_operator(cairo.OPERATOR_OVER if (primitive.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
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self.ctx.move_to(*[self.scale[0] * (coord + 0.01) for coord in primitive.position])
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self.ctx.scale(1, -1)
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self.ctx.show_text(primitive.net_name)
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self.ctx.scale(1, -1)
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def _paint_inverted_layer(self):
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self.mask_ctx.set_operator(cairo.OPERATOR_OVER)
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self.mask_ctx.set_source_rgba(*self.color, alpha=self.alpha)
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self.mask_ctx.paint()
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def _render_mask(self):
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self.ctx.set_operator(cairo.OPERATOR_OVER)
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ptn = cairo.SurfacePattern(self.mask)
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ptn.set_matrix(cairo.Matrix(xx=1.0, yy=-1.0, x0=-self.origin_in_pixels[0], y0=self.size_in_pixels[1] + self.origin_in_pixels[1]))
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self.ctx.set_source(ptn)
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self.ctx.paint()
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def _paint_background(self):
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if not self.bg:
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self.bg = True
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self.ctx.set_source_rgba(*self.background_color)
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self.ctx.paint()
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def dump(self, filename):
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is_svg = filename.lower().endswith(".svg")
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if is_svg:
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self.surface.finish()
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self.surface_buffer.flush()
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with open(filename, "w") as f:
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self.surface_buffer.seek(0)
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f.write(self.surface_buffer.read())
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f.flush()
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else:
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self.surface.write_to_png(filename)
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def dump_svg_str(self):
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self.surface.finish()
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self.surface_buffer.flush()
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return self.surface_buffer.read()
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