From 39726e3936c5fa5c50158727e8eb7f5d01cb1b49 Mon Sep 17 00:00:00 2001 From: Hamilton Kibbe Date: Wed, 22 Jul 2015 22:13:09 -0400 Subject: Fix multiple layer issue in cairo-unification branch (see #33) --- gerber/render/cairo_backend.py | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) (limited to 'gerber/render') diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py index 16638f5..2791d76 100644 --- a/gerber/render/cairo_backend.py +++ b/gerber/render/cairo_backend.py @@ -31,20 +31,21 @@ class GerberCairoContext(GerberContext): self.scale = (scale, scale) self.surface = None self.ctx = None + self.bg = False 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]) + if self.surface is None: + 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) @@ -140,8 +141,10 @@ class GerberCairoContext(GerberContext): self.ctx.set_operator(cairo.OPERATOR_CLEAR) def _paint_background(self): - self.ctx.set_source_rgba(*self.background_color) - self.ctx.paint() + if not self.bg: + self.bg = True + self.ctx.set_source_rgba(*self.background_color) + self.ctx.paint() def dump(self, filename): is_svg = filename.lower().endswith(".svg") -- cgit