#! /usr/bin/env python # -*- coding: utf-8 -*- # Copyright 2014 Hamilton Kibbe # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # http://www.apache.org/licenses/LICENSE-2.0 # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from .render import GerberContext import cairocffi as cairo from operator import mul import math import tempfile from ..primitives import * class GerberCairoContext(GerberContext): def __init__(self, scale=300): GerberContext.__init__(self) self.scale = (scale, scale) self.surface = None self.ctx = None def set_bounds(self, bounds): origin_in_inch = (bounds[0][0], bounds[1][0]) size_in_inch = (abs(bounds[0][1] - bounds[0][0]), abs(bounds[1][1] - bounds[1][0])) size_in_pixels = map(mul, size_in_inch, self.scale) self.surface_buffer = tempfile.NamedTemporaryFile() self.surface = cairo.SVGSurface(self.surface_buffer, size_in_pixels[0], size_in_pixels[1]) self.ctx = cairo.Context(self.surface) self.ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD) self.ctx.scale(1, -1) self.ctx.translate(-(origin_in_inch[0] * self.scale[0]), (-origin_in_inch[1]*self.scale[0]) - size_in_pixels[1]) # self.ctx.translate(-(origin_in_inch[0] * self.scale[0]), -origin_in_inch[1]*self.scale[1]) def _render_line(self, line, color): start = map(mul, line.start, self.scale) end = map(mul, line.end, self.scale) if isinstance(line.aperture, Circle): width = line.aperture.diameter self.ctx.set_source_rgba(*color, alpha=self.alpha) self.ctx.set_operator(cairo.OPERATOR_OVER if (line.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR) self.ctx.set_line_width(width * self.scale[0]) self.ctx.set_line_cap(cairo.LINE_CAP_ROUND) self.ctx.move_to(*start) self.ctx.line_to(*end) self.ctx.stroke() elif isinstance(line.aperture, Rectangle): points = [tuple(map(mul, x, self.scale)) for x in line.vertices] self.ctx.set_source_rgba(*color, alpha=self.alpha) self.ctx.set_operator(cairo.OPERATOR_OVER if (line.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR) self.ctx.set_line_width(0) self.ctx.move_to(*points[0]) for point in points[1:]: self.ctx.line_to(*point) self.ctx.fill() def _render_arc(self, arc, color): center = map(mul, arc.center, self.scale) start = map(mul, arc.start, self.scale) end = map(mul, arc.end, self.scale) radius = self.scale * arc.radius angle1 = arc.start_angle angle2 = arc.end_angle width = arc.aperture.diameter if arc.aperture.diameter != 0 else 0.001 self.ctx.set_source_rgba(*color, alpha=self.alpha) self.ctx.set_operator(cairo.OPERATOR_OVER if (arc.level_polarity == "dark" and not self.invert)else cairo.OPERATOR_CLEAR) self.ctx.set_line_width(width * self.scale[0]) self.ctx.set_line_cap(cairo.LINE_CAP_ROUND) self.ctx.move_to(*start) # You actually have to do this... if arc.direction == 'counterclockwise': self.ctx.arc(*center, radius=radius, angle1=angle1, angle2=angle2) else: self.ctx.arc_negative(*center, radius=radius, angle1=angle1, angle2=angle2) self.ctx.move_to(*end) # ...lame def _render_region(self, region, color): points = [tuple(map(mul, point, self.scale)) for point in region.points] self.ctx.set_source_rgba(*color, alpha=self.alpha) self.ctx.set_operator(cairo.OPERATOR_OVER if (region.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR) self.ctx.set_line_width(0) self.ctx.move_to(*points[0]) for point in points[1:]: self.ctx.line_to(*point) self.ctx.fill() def _render_circle(self, circle, color): center = tuple(map(mul, circle.position, self.scale)) self.ctx.set_source_rgba(*color, alpha=self.alpha) self.ctx.set_operator(cairo.OPERATOR_OVER if (circle.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR) self.ctx.set_line_width(0) self.ctx.arc(*center, radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi) self.ctx.fill() def _render_rectangle(self, rectangle, color): ll = map(mul, rectangle.lower_left, self.scale) width, height = tuple(map(mul, (rectangle.width, rectangle.height), map(abs, self.scale))) self.ctx.set_source_rgba(*color, alpha=self.alpha) self.ctx.set_operator(cairo.OPERATOR_OVER if (rectangle.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR) self.ctx.set_line_width(0) self.ctx.rectangle(*ll,width=width, height=height) self.ctx.fill() def _render_obround(self, obround, color): self._render_circle(obround.subshapes['circle1'], color) self._render_circle(obround.subshapes['circle2'], color) self._render_rectangle(obround.subshapes['rectangle'], color) def _render_drill(self, circle, color): self._render_circle(circle, color) def _render_test_record(self, primitive, color): self.ctx.select_font_face('monospace', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL) self.ctx.set_font_size(200) self._render_circle(Circle(primitive.position, 0.01), color) self.ctx.set_source_rgb(*color) self.ctx.set_operator(cairo.OPERATOR_OVER if (primitive.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR) self.ctx.move_to(*[self.scale[0] * (coord + 0.01) for coord in primitive.position]) self.ctx.scale(1, -1) self.ctx.show_text(primitive.net_name) self.ctx.scale(1, -1) def _paint_inverted_layer(self): self.ctx.set_source_rgba(*self.background_color) self.ctx.set_operator(cairo.OPERATOR_OVER) self.ctx.paint() self.ctx.set_operator(cairo.OPERATOR_CLEAR) def dump(self, filename): is_svg = filename.lower().endswith(".svg") if is_svg: self.surface.finish() self.surface_buffer.flush() with open(filename, "w") as f: f.write(open(self.surface_buffer.name, "r").read()) f.flush() else: self.surface.write_to_png(filename)