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Fix rendering of 0-width lines (e.g. board outlines) in SVG and Cairo renderer

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This commit is contained in:
Hamilton Kibbe 2014-10-27 08:29:43 -04:00
parent 318a81382e
commit 95de179bb0
2 changed files with 13 additions and 63 deletions
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13
gerber/render/cairo_backend.py
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@ -20,7 +20,7 @@ from operator import mul
import cairocffi as cairo
import math
SCALE = 300.
SCALE = 400.
class GerberCairoContext(GerberContext):
@ -48,8 +48,9 @@ class GerberCairoContext(GerberContext):
def _render_line(self, line, color):
start = map(mul, line.start, self.scale)
end = map(mul, line.end, self.scale)
self.ctx.set_source_rgb (*color)
self.ctx.set_line_width(line.width * SCALE)
width = line.width if line.width != 0 else 0.001
self.ctx.set_source_rgba(*color, alpha=self.alpha)
self.ctx.set_line_width(width * SCALE)
self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
self.ctx.move_to(*start)
self.ctx.line_to(*end)
@ -57,7 +58,7 @@ class GerberCairoContext(GerberContext):
def _render_region(self, region, color):
points = [tuple(map(mul, point, self.scale)) for point in region.points]
self.ctx.set_source_rgb (*color)
self.ctx.set_source_rgba(*color, alpha=self.alpha)
self.ctx.set_line_width(0)
self.ctx.move_to(*points[0])
for point in points[1:]:
@ -66,7 +67,7 @@ class GerberCairoContext(GerberContext):
def _render_circle(self, circle, color):
center = map(mul, circle.position, self.scale)
self.ctx.set_source_rgb (*color)
self.ctx.set_source_rgba(*color, alpha=self.alpha)
self.ctx.set_line_width(0)
self.ctx.arc(*center, radius=circle.radius * SCALE, angle1=0, angle2=2 * math.pi)
self.ctx.fill()
@ -74,7 +75,7 @@ class GerberCairoContext(GerberContext):
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_rgb (*color)
self.ctx.set_source_rgba(*color, alpha=self.alpha)
self.ctx.set_line_width(0)
self.ctx.rectangle(*ll,width=width, height=height)
self.ctx.fill()