353 lines
14 KiB
Python
353 lines
14 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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try:
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import cairo
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except ImportError:
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import cairocffi as cairo
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from operator import mul, div
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import math
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import tempfile
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from .render import GerberContext
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from ..primitives import *
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try:
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from cStringIO import StringIO
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except(ImportError):
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from io import StringIO
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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_inch = None
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self.size_in_inch = None
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def set_bounds(self, bounds, new_surface=False):
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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 = tuple(map(mul, size_in_inch, self.scale))
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self.origin_in_inch = origin_in_inch if self.origin_in_inch is None else self.origin_in_inch
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self.size_in_inch = size_in_inch if self.size_in_inch is None else self.size_in_inch
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if (self.surface is None) or new_surface:
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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 = cairo.SVGSurface(None, 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_layers(self, layers, filename):
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""" Render a set of layers
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"""
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self.set_bounds(layers[0].bounds, True)
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self._paint_background(True)
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for layer in layers:
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self._render_layer(layer)
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self.dump(filename)
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@property
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def origin_in_pixels(self):
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return tuple(map(mul, self.origin_in_inch, self.scale)) if self.origin_in_inch is not None else (0.0, 0.0)
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@property
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def size_in_pixels(self):
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return tuple(map(mul, self.size_in_inch, self.scale)) if self.size_in_inch is not None else (0.0, 0.0)
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def _render_layer(self, layer):
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self.color = layer.settings.color
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self.alpha = layer.settings.alpha
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self.invert = layer.settings.invert
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if layer.settings.mirror:
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raise Warning('mirrored layers aren\'t supported yet...')
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if self.invert:
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self._clear_mask()
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for p in layer.primitives:
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self.render(p)
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if self.invert:
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self._render_mask()
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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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ctx = self.ctx
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ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha)
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ctx.set_operator(cairo.OPERATOR_OVER if line.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
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else:
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ctx = self.mask_ctx
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ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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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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ctx.set_line_width(width * self.scale[0])
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ctx.set_line_cap(cairo.LINE_CAP_ROUND)
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ctx.move_to(*start)
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ctx.line_to(*end)
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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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ctx.set_line_width(0)
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ctx.move_to(*points[0])
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for point in points[1:]:
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ctx.line_to(*point)
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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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if angle1 == angle2 and arc.quadrant_mode != 'single-quadrant':
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# Make the angles slightly different otherwise Cario will draw nothing
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angle2 -= 0.000000001
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if isinstance(arc.aperture, Circle):
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width = arc.aperture.diameter if arc.aperture.diameter != 0 else 0.001
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else:
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width = max(arc.aperture.width, arc.aperture.height, 0.001)
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if not self.invert:
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ctx = self.ctx
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ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha)
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ctx.set_operator(cairo.OPERATOR_OVER if arc.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
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else:
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ctx = self.mask_ctx
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ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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ctx.set_operator(cairo.OPERATOR_CLEAR)
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ctx.set_line_width(width * self.scale[0])
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ctx.set_line_cap(cairo.LINE_CAP_ROUND)
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ctx.move_to(*start) # You actually have to do this...
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if arc.direction == 'counterclockwise':
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ctx.arc(center[0], center[1], radius, angle1, angle2)
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else:
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ctx.arc_negative(center[0], center[1], radius, angle1, angle2)
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ctx.move_to(*end) # ...lame
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ctx.stroke()
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def _render_region(self, region, color):
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if not self.invert:
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ctx = self.ctx
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ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha)
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ctx.set_operator(cairo.OPERATOR_OVER if region.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
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else:
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ctx = self.mask_ctx
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ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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ctx.set_operator(cairo.OPERATOR_CLEAR)
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ctx.set_line_width(0)
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ctx.set_line_cap(cairo.LINE_CAP_ROUND)
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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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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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ctx.arc(center[0], center[1], radius, angle1, angle2)
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else:
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ctx.arc_negative(center[0], center[1], radius, angle1, angle2)
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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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ctx = self.ctx
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ctx.set_source_rgba(*color, alpha=self.alpha)
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ctx.set_operator(cairo.OPERATOR_OVER if circle.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
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else:
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ctx = self.mask_ctx
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ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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ctx.set_operator(cairo.OPERATOR_CLEAR)
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ctx.set_line_width(0)
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ctx.arc(center[0], center[1], radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi)
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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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ctx = self.ctx
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ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha)
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ctx.set_operator(cairo.OPERATOR_OVER if rectangle.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
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else:
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ctx = self.mask_ctx
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ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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ctx.set_operator(cairo.OPERATOR_CLEAR)
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if rectangle.rotation != 0:
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ctx.save()
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center = map(mul, rectangle.position, self.scale)
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matrix = cairo.Matrix()
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matrix.translate(center[0], center[1])
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# For drawing, we already handles the translation
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ll[0] = ll[0] - center[0]
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ll[1] = ll[1] - center[1]
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matrix.rotate(rectangle.rotation)
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ctx.transform(matrix)
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ctx.set_line_width(0)
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ctx.rectangle(ll[0], ll[1], width, height)
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ctx.fill()
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if rectangle.rotation != 0:
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ctx.restore()
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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_polygon(self, polygon, color):
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if polygon.hole_radius > 0:
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self.ctx.push_group()
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vertices = polygon.vertices
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self.ctx.set_source_rgba(color[0], color[1], color[2], self.alpha)
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self.ctx.set_operator(cairo.OPERATOR_OVER if (polygon.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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# Start from before the end so it is easy to iterate and make sure it is closed
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self.ctx.move_to(*map(mul, vertices[-1], self.scale))
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for v in vertices:
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self.ctx.line_to(*map(mul, v, self.scale))
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self.ctx.fill()
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if polygon.hole_radius > 0:
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# Render the center clear
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center = tuple(map(mul, polygon.position, self.scale))
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self.ctx.set_source_rgba(color[0], color[1], color[2], self.alpha)
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self.ctx.set_operator(cairo.OPERATOR_CLEAR)
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self.ctx.set_line_width(0)
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self.ctx.arc(center[0], center[1], polygon.hole_radius * self.scale[0], 0, 2 * math.pi)
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self.ctx.fill()
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self.ctx.pop_group_to_source()
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self.ctx.paint_with_alpha(1)
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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_slot(self, slot, color):
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start = map(mul, slot.start, self.scale)
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end = map(mul, slot.end, self.scale)
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width = slot.diameter
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if not self.invert:
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ctx = self.ctx
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ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha)
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ctx.set_operator(cairo.OPERATOR_OVER if slot.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
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else:
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ctx = self.mask_ctx
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ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
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ctx.set_operator(cairo.OPERATOR_CLEAR)
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ctx.set_line_width(width * self.scale[0])
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ctx.set_line_cap(cairo.LINE_CAP_ROUND)
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ctx.move_to(*start)
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ctx.line_to(*end)
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ctx.stroke()
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def _render_amgroup(self, amgroup, color):
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self.ctx.push_group()
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for primitive in amgroup.primitives:
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self.render(primitive)
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self.ctx.pop_group_to_source()
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self.ctx.paint_with_alpha(1)
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def _render_test_record(self, primitive, color):
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position = tuple(map(add, primitive.position, self.origin_in_inch))
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self.ctx.select_font_face('monospace', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD)
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self.ctx.set_font_size(13)
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self._render_circle(Circle(position, 0.015), 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" else cairo.OPERATOR_CLEAR)
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self.ctx.move_to(*[self.scale[0] * (coord + 0.015) for coord in 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 _clear_mask(self):
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self.mask_ctx.set_operator(cairo.OPERATOR_OVER)
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self.mask_ctx.set_source_rgba(self.background_color[0], self.background_color[1], self.background_color[2], 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],
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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, force=False):
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if (not self.bg) or force:
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self.bg = True
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self.ctx.set_source_rgba(self.background_color[0], self.background_color[1], self.background_color[2], alpha=1.0)
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self.ctx.paint()
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def dump(self, filename):
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if filename and filename.lower().endswith(".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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return self.surface.write_to_png(filename)
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def dump_str(self):
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""" Return a string containing the rendered image.
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"""
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fobj = StringIO()
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self.surface.write_to_png(fobj)
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return fobj.getvalue()
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def dump_svg_str(self):
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""" Return a string containg the rendered SVG.
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"""
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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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