Parser half-refactored

2 files changed, 0 insertions, 671 deletions

diff --git a/gerbonara/gerber/render/__init__.py b/gerbonara/gerber/render/__init__.py
deleted file mode 100644
index c7dbdd5..0000000
--- a/gerbonara/gerber/render/__init__.py
+++ /dev/null
@@ -1,31 +0,0 @@
-#! /usr/bin/env python
-# -*- coding: utf-8 -*-
-
-# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
-
-# 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.
-"""
-gerber.render
-============
-**Gerber Renderers**
-
-This module provides contexts for rendering images of gerber layers. Currently
-SVG is the only supported format.
-"""
-
-from .render import RenderSettings
-from .cairo_backend import GerberCairoContext
-
-available_renderers = {
-    'cairo': GerberCairoContext,
-}
diff --git a/gerbonara/gerber/render/cairo_backend.py b/gerbonara/gerber/render/cairo_backend.py
deleted file mode 100644
index 431ab94..0000000
--- a/gerbonara/gerber/render/cairo_backend.py
+++ /dev/null
@@ -1,640 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
-
-# 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.
-
-try:
-    import cairo
-except ImportError:
-    import cairocffi as cairo
-
-from operator import mul
-import tempfile
-import warnings
-import os
-
-from .render import GerberContext, RenderSettings
-from .theme import THEMES
-from ..primitives import *
-from ..utils import rotate_point
-
-from io import BytesIO
-
-
-class GerberCairoContext(GerberContext):
-
-    def __init__(self, scale=300):
-        super(GerberCairoContext, self).__init__()
-        self.scale = (scale, scale)
-        self.surface = None
-        self.surface_buffer = None
-        self.ctx = None
-        self.active_layer = None
-        self.active_matrix = None
-        self.output_ctx = None
-        self.has_bg = False
-        self.origin_in_inch = None
-        self.size_in_inch = None
-        self._xform_matrix = None
-        self._render_count = 0
-
-    @property
-    def origin_in_pixels(self):
-        return (self.scale_point(self.origin_in_inch)
-                if self.origin_in_inch is not None else (0.0, 0.0))
-
-    @property
-    def size_in_pixels(self):
-        return (self.scale_point(self.size_in_inch)
-                if self.size_in_inch is not None else (0.0, 0.0))
-
-    def set_bounds(self, bounds, new_surface=False):
-        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 = self.scale_point(size_in_inch)
-        self.origin_in_inch = origin_in_inch if self.origin_in_inch is None else self.origin_in_inch
-        self.size_in_inch = size_in_inch if self.size_in_inch is None else self.size_in_inch
-        self._xform_matrix = cairo.Matrix(xx=1.0, yy=-1.0,
-                                          x0=-self.origin_in_pixels[0],
-                                          y0=self.size_in_pixels[1])
-        if (self.surface is None) or new_surface:
-            self.surface_buffer = tempfile.NamedTemporaryFile()
-            self.surface = cairo.SVGSurface(self.surface_buffer, size_in_pixels[0], size_in_pixels[1])
-            self.output_ctx = cairo.Context(self.surface)
-
-    def render_layer(self, layer, filename=None, settings=None, bgsettings=None,
-                     verbose=False, bounds=None):
-        if settings is None:
-            settings = THEMES['default'].get(layer.layer_class, RenderSettings())
-        if bgsettings is None:
-            bgsettings = THEMES['default'].get('background', RenderSettings())
-
-        if self._render_count == 0:
-            if verbose:
-                print('[Render]: Rendering Background.')
-            self.clear()
-            if bounds is not None:
-                self.set_bounds(bounds)
-            else:
-                self.set_bounds(layer.bounds)
-            self.paint_background(bgsettings)
-        if verbose:
-            print('[Render]: Rendering {} Layer.'.format(layer.layer_class))
-        self._render_count += 1
-        self._render_layer(layer, settings)
-        if filename is not None:
-            self.dump(filename, verbose)
-
-    def render_layers(self, layers, filename, theme=THEMES['default'],
-                      verbose=False, max_width=800, max_height=600):
-        """ Render a set of layers
-        """
-        # Calculate scale parameter
-        x_range = [10000, -10000]
-        y_range = [10000, -10000]
-        for layer in layers:
-            bounds = layer.bounds
-            if bounds is not None:
-                layer_x, layer_y = bounds
-                x_range[0] = min(x_range[0], layer_x[0])
-                x_range[1] = max(x_range[1], layer_x[1])
-                y_range[0] = min(y_range[0], layer_y[0])
-                y_range[1] = max(y_range[1], layer_y[1])
-        width = x_range[1] - x_range[0]
-        height = y_range[1] - y_range[0]
-
-        scale = math.floor(min(float(max_width)/width, float(max_height)/height))
-        self.scale = (scale, scale)
-
-        self.clear()
-
-        # Render layers
-        bgsettings = theme['background']
-        for layer in layers:
-            settings = theme.get(layer.layer_class, RenderSettings())
-            self.render_layer(layer, settings=settings, bgsettings=bgsettings,
-                              verbose=verbose)
-        self.dump(filename, verbose)
-
-    def dump(self, filename=None, verbose=False):
-        """ Save image as `filename`
-        """
-        try:
-            is_svg = os.path.splitext(filename.lower())[1] == '.svg'
-        except:
-            is_svg = False
-
-        if verbose:
-            print('[Render]: Writing image to {}'.format(filename))
-
-        if is_svg:
-            self.surface.finish()
-            self.surface_buffer.flush()
-            with open(filename, "wb") as f:
-                self.surface_buffer.seek(0)
-                f.write(self.surface_buffer.read())
-                f.flush()
-        else:
-            return self.surface.write_to_png(filename)
-
-    def dump_str(self):
-        """ Return a byte-string containing the rendered image.
-        """
-        fobj = BytesIO()
-        self.surface.write_to_png(fobj)
-        return fobj.getvalue()
-
-    def dump_svg_str(self):
-        """ Return a string containg the rendered SVG.
-        """
-        self.surface.finish()
-        self.surface_buffer.flush()
-        return self.surface_buffer.read()
-
-    def clear(self):
-        self.surface = None
-        self.output_ctx = None
-        self.has_bg = False
-        self.origin_in_inch = None
-        self.size_in_inch = None
-        self._xform_matrix = None
-        self._render_count = 0
-        self.surface_buffer = None
-
-    def _new_mask(self):
-        class Mask:
-            def __enter__(msk):
-                size_in_pixels = self.size_in_pixels
-                msk.surface = cairo.SVGSurface(None, size_in_pixels[0],
-                                               size_in_pixels[1])
-                msk.ctx = cairo.Context(msk.surface)
-                msk.ctx.translate(-self.origin_in_pixels[0], -self.origin_in_pixels[1])
-                return msk
-
-
-            def __exit__(msk, exc_type, exc_val, traceback):
-                if hasattr(msk.surface, 'finish'):
-                    msk.surface.finish()
-
-        return Mask()
-
-    def _render_layer(self, layer, settings):
-        self.invert = settings.invert
-        # Get a new clean layer to render on
-        self.new_render_layer(mirror=settings.mirror)
-        for prim in layer.primitives:
-            self.render(prim)
-        # Add layer to image
-        self.flatten(settings.color, settings.alpha)
-
-    def _render_line(self, line, color):
-        start = self.scale_point(line.start)
-        end = self.scale_point(line.end)
-        self.ctx.set_operator(cairo.OPERATOR_OVER
-                              if (not self.invert)
-                                 and line.level_polarity == 'dark'
-                              else cairo.OPERATOR_CLEAR)
-
-        with self._clip_primitive(line):
-            with self._new_mask() as mask:
-                if isinstance(line.aperture, Circle):
-                    width = line.aperture.diameter
-                    mask.ctx.set_line_width(width * self.scale[0])
-                    mask.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
-                    mask.ctx.move_to(*start)
-                    mask.ctx.line_to(*end)
-                    mask.ctx.stroke()
-
-                elif hasattr(line, 'vertices') and line.vertices is not None:
-                    points = [self.scale_point(x) for x in line.vertices]
-                    mask.ctx.set_line_width(0)
-                    mask.ctx.move_to(*points[-1])
-                    for point in points:
-                        mask.ctx.line_to(*point)
-                    mask.ctx.fill()
-                self.ctx.mask_surface(mask.surface, self.origin_in_pixels[0])
-
-    def _render_arc(self, arc, color):
-        center = self.scale_point(arc.center)
-        start = self.scale_point(arc.start)
-        end = self.scale_point(arc.end)
-        radius = self.scale[0] * arc.radius
-        two_pi = 2 * math.pi
-        angle1 = (arc.start_angle + two_pi) % two_pi
-        angle2 = (arc.end_angle + two_pi) % two_pi
-
-        if arc.quadrant_mode == 'single-quadrant':
-            warnings.warn('Cairo backend does not support single-quadrant arcs.')
-
-        if angle1 == angle2:
-            # Make the angles slightly different otherwise Cario will draw nothing
-            angle2 -= 0.000000001
-        if isinstance(arc.aperture, Circle):
-            width = arc.aperture.diameter if arc.aperture.diameter != 0 else 0.001
-        else:
-            width = max(arc.aperture.width, arc.aperture.height, 0.001)
-
-        self.ctx.set_operator(cairo.OPERATOR_OVER
-                              if (not self.invert)
-                                 and arc.level_polarity == 'dark'
-                              else cairo.OPERATOR_CLEAR)
-        with self._clip_primitive(arc):
-            with self._new_mask() as mask:
-                mask.ctx.set_line_width(width * self.scale[0])
-                mask.ctx.set_line_cap(cairo.LINE_CAP_ROUND if isinstance(arc.aperture, Circle) else cairo.LINE_CAP_SQUARE)
-                mask.ctx.move_to(*start)  # You actually have to do this...
-                if arc.direction == 'counterclockwise':
-                    mask.ctx.arc(center[0], center[1], radius, angle1, angle2)
-                else:
-                    mask.ctx.arc_negative(center[0], center[1], radius, angle1, angle2)
-                mask.ctx.move_to(*end)  # ...lame
-                mask.ctx.stroke()
-
-                #if isinstance(arc.aperture, Rectangle):
-                #    print("Flash Rectangle Ends")
-                #    print(arc.aperture.rotation * 180/math.pi)
-                #    rect = arc.aperture
-                #    width = self.scale[0] * rect.width
-                #    height = self.scale[1] * rect.height
-                #    for point, angle in zip((start, end), (angle1, angle2)):
-                #        print("{} w {} h{}".format(point, rect.width, rect.height))
-                #        mask.ctx.rectangle(point[0] - width/2.0,
-                #                           point[1] - height/2.0, width, height)
-                #        mask.ctx.fill()
-
-                self.ctx.mask_surface(mask.surface, self.origin_in_pixels[0])
-
-    def _render_region(self, region, color):
-        self.ctx.set_operator(cairo.OPERATOR_OVER
-                              if (not self.invert) and region.level_polarity == 'dark'
-                              else cairo.OPERATOR_CLEAR)
-        with self._clip_primitive(region):
-            with self._new_mask() as mask:
-                mask.ctx.set_line_width(0)
-                mask.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
-                mask.ctx.move_to(*self.scale_point(region.primitives[0].start))
-                for prim in region.primitives:
-                    if isinstance(prim, Line):
-                        mask.ctx.line_to(*self.scale_point(prim.end))
-                    else:
-                        center = self.scale_point(prim.center)
-                        radius = self.scale[0] * prim.radius
-                        angle1 = prim.start_angle
-                        angle2 = prim.end_angle
-
-                        if angle1 == angle2:
-                            # Make the angles slightly different otherwise Cario will draw nothing
-                            angle2 -= 0.000000001
-                        if prim.direction == 'counterclockwise':
-                            mask.ctx.arc(center[0], center[1], radius,
-                                         angle1, angle2)
-                        else:
-                            mask.ctx.arc_negative(center[0], center[1], radius,
-                                                  angle1, angle2)
-                mask.ctx.fill()
-                self.ctx.mask_surface(mask.surface, self.origin_in_pixels[0])
-
-    def _render_circle(self, circle, color):
-        center = self.scale_point(circle.position)
-        self.ctx.set_operator(cairo.OPERATOR_OVER
-                              if (not self.invert)
-                                 and circle.level_polarity == 'dark'
-                              else cairo.OPERATOR_CLEAR)
-        with self._clip_primitive(circle):
-            with self._new_mask() as mask:
-                mask.ctx.set_line_width(0)
-                mask.ctx.arc(center[0], center[1], (circle.radius * self.scale[0]), 0, (2 * math.pi))
-                mask.ctx.fill()
-
-                if hasattr(circle, 'hole_diameter') and circle.hole_diameter is not None and circle.hole_diameter > 0:
-                    mask.ctx.set_operator(cairo.OPERATOR_CLEAR)
-                    mask.ctx.arc(center[0], center[1], circle.hole_radius * self.scale[0], 0, 2 * math.pi)
-                    mask.ctx.fill()
-
-                if (hasattr(circle, 'hole_width') and hasattr(circle, 'hole_height')
-                        and circle.hole_width is not None and circle.hole_height is not None
-                        and circle.hole_width > 0 and circle.hole_height > 0):
-                    mask.ctx.set_operator(cairo.OPERATOR_CLEAR
-                                          if circle.level_polarity == 'dark'
-                                             and (not self.invert)
-                                          else cairo.OPERATOR_OVER)
-                    width, height = self.scale_point((circle.hole_width, circle.hole_height))
-                    lower_left = rotate_point(
-                        (center[0] - width / 2.0, center[1] - height / 2.0),
-                                              circle.rotation, center)
-                    lower_right = rotate_point((center[0] + width / 2.0, center[1] - height / 2.0),
-                                               circle.rotation, center)
-                    upper_left = rotate_point((center[0] - width / 2.0, center[1] + height / 2.0),
-                                              circle.rotation, center)
-                    upper_right = rotate_point((center[0] + width / 2.0, center[1] + height / 2.0),
-                                               circle.rotation, center)
-                    points = (lower_left, lower_right, upper_right, upper_left)
-                    mask.ctx.move_to(*points[-1])
-                    for point in points:
-                        mask.ctx.line_to(*point)
-                    mask.ctx.fill()
-                self.ctx.mask_surface(mask.surface, self.origin_in_pixels[0])
-
-    def _render_rectangle(self, rectangle, color):
-        lower_left = self.scale_point(rectangle.lower_left)
-        width, height = tuple([abs(coord) for coord in
-                               self.scale_point((rectangle.width,
-                                                 rectangle.height))])
-        self.ctx.set_operator(cairo.OPERATOR_OVER
-                              if (not self.invert)
-                                 and rectangle.level_polarity == 'dark'
-                              else cairo.OPERATOR_CLEAR)
-        with self._clip_primitive(rectangle):
-            with self._new_mask() as mask:
-                mask.ctx.set_line_width(0)
-                mask.ctx.rectangle(lower_left[0], lower_left[1], width, height)
-                mask.ctx.fill()
-
-                center = self.scale_point(rectangle.position)
-                if rectangle.hole_diameter > 0:
-                    # Render the center clear
-                    mask.ctx.set_operator(cairo.OPERATOR_CLEAR
-                                          if rectangle.level_polarity == 'dark'
-                                             and (not self.invert)
-                                          else cairo.OPERATOR_OVER)
-
-                    mask.ctx.arc(center[0], center[1], rectangle.hole_radius * self.scale[0], 0, 2 * math.pi)
-                    mask.ctx.fill()
-
-                if rectangle.hole_width > 0 and rectangle.hole_height > 0:
-                    mask.ctx.set_operator(cairo.OPERATOR_CLEAR
-                                          if rectangle.level_polarity == 'dark'
-                                             and (not self.invert)
-                                          else cairo.OPERATOR_OVER)
-                    width, height = self.scale_point((rectangle.hole_width, rectangle.hole_height))
-                    lower_left = rotate_point((center[0] - width/2.0, center[1] - height/2.0), rectangle.rotation, center)
-                    lower_right = rotate_point((center[0] + width/2.0, center[1] - height/2.0), rectangle.rotation, center)
-                    upper_left = rotate_point((center[0] - width / 2.0, center[1] + height / 2.0), rectangle.rotation, center)
-                    upper_right = rotate_point((center[0] + width / 2.0, center[1] + height / 2.0), rectangle.rotation, center)
-                    points = (lower_left, lower_right, upper_right, upper_left)
-                    mask.ctx.move_to(*points[-1])
-                    for point in points:
-                        mask.ctx.line_to(*point)
-                    mask.ctx.fill()
-                self.ctx.mask_surface(mask.surface, self.origin_in_pixels[0])
-
-    def _render_obround(self, obround, color):
-        self.ctx.set_operator(cairo.OPERATOR_OVER
-                              if (not self.invert)
-                                 and obround.level_polarity == 'dark'
-                              else cairo.OPERATOR_CLEAR)
-        with self._clip_primitive(obround):
-            with self._new_mask() as mask:
-                mask.ctx.set_line_width(0)
-
-                # Render circles
-                for circle in (obround.subshapes['circle1'], obround.subshapes['circle2']):
-                    center = self.scale_point(circle.position)
-                    mask.ctx.arc(center[0], center[1], (circle.radius * self.scale[0]), 0, (2 * math.pi))
-                    mask.ctx.fill()
-
-                # Render Rectangle
-                rectangle = obround.subshapes['rectangle']
-                lower_left = self.scale_point(rectangle.lower_left)
-                width, height = tuple([abs(coord) for coord in
-                                       self.scale_point((rectangle.width,
-                                                         rectangle.height))])
-                mask.ctx.rectangle(lower_left[0], lower_left[1], width, height)
-                mask.ctx.fill()
-
-                center = self.scale_point(obround.position)
-                if obround.hole_diameter > 0:
-                    # Render the center clear
-                    mask.ctx.set_operator(cairo.OPERATOR_CLEAR)
-                    mask.ctx.arc(center[0], center[1], obround.hole_radius * self.scale[0], 0, 2 * math.pi)
-                    mask.ctx.fill()
-
-                if obround.hole_width > 0 and obround.hole_height > 0:
-                    mask.ctx.set_operator(cairo.OPERATOR_CLEAR
-                                          if rectangle.level_polarity == 'dark'
-                                             and (not self.invert)
-                                          else cairo.OPERATOR_OVER)
-                    width, height =self.scale_point((obround.hole_width, obround.hole_height))
-                    lower_left = rotate_point((center[0] - width / 2.0, center[1] - height / 2.0),
-                                              obround.rotation, center)
-                    lower_right = rotate_point((center[0] + width / 2.0, center[1] - height / 2.0),
-                                               obround.rotation, center)
-                    upper_left = rotate_point((center[0] - width / 2.0, center[1] + height / 2.0),
-                                              obround.rotation, center)
-                    upper_right = rotate_point((center[0] + width / 2.0, center[1] + height / 2.0),
-                                               obround.rotation, center)
-                    points = (lower_left, lower_right, upper_right, upper_left)
-                    mask.ctx.move_to(*points[-1])
-                    for point in points:
-                        mask.ctx.line_to(*point)
-                    mask.ctx.fill()
-
-                self.ctx.mask_surface(mask.surface, self.origin_in_pixels[0])
-
-    def _render_polygon(self, polygon, color):
-        self.ctx.set_operator(cairo.OPERATOR_OVER
-                              if (not self.invert)
-                                 and polygon.level_polarity == 'dark'
-                              else cairo.OPERATOR_CLEAR)
-        with self._clip_primitive(polygon):
-            with self._new_mask() as mask:
-
-                vertices = polygon.vertices
-                mask.ctx.set_line_width(0)
-                mask.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
-                # Start from before the end so it is easy to iterate and make sure
-                # it is closed
-                mask.ctx.move_to(*self.scale_point(vertices[-1]))
-                for v in vertices:
-                    mask.ctx.line_to(*self.scale_point(v))
-                mask.ctx.fill()
-
-                center = self.scale_point(polygon.position)
-                if polygon.hole_radius > 0:
-                    # Render the center clear
-                    mask.ctx.set_operator(cairo.OPERATOR_CLEAR
-                                          if polygon.level_polarity == 'dark'
-                                             and (not self.invert)
-                                          else cairo.OPERATOR_OVER)
-                    mask.ctx.set_line_width(0)
-                    mask.ctx.arc(center[0],
-                                 center[1],
-                                 polygon.hole_radius * self.scale[0], 0, 2 * math.pi)
-                    mask.ctx.fill()
-
-                if polygon.hole_width > 0 and polygon.hole_height > 0:
-                    mask.ctx.set_operator(cairo.OPERATOR_CLEAR
-                                          if polygon.level_polarity == 'dark'
-                                             and (not self.invert)
-                                          else cairo.OPERATOR_OVER)
-                    width, height = self.scale_point((polygon.hole_width, polygon.hole_height))
-                    lower_left = rotate_point((center[0] - width / 2.0, center[1] - height / 2.0),
-                                              polygon.rotation, center)
-                    lower_right = rotate_point((center[0] + width / 2.0, center[1] - height / 2.0),
-                                               polygon.rotation, center)
-                    upper_left = rotate_point((center[0] - width / 2.0, center[1] + height / 2.0),
-                                              polygon.rotation, center)
-                    upper_right = rotate_point((center[0] + width / 2.0, center[1] + height / 2.0),
-                                               polygon.rotation, center)
-                    points = (lower_left, lower_right, upper_right, upper_left)
-                    mask.ctx.move_to(*points[-1])
-                    for point in points:
-                        mask.ctx.line_to(*point)
-                    mask.ctx.fill()
-
-                self.ctx.mask_surface(mask.surface, self.origin_in_pixels[0])
-
-    def _render_drill(self, circle, color=None):
-        color = color if color is not None else self.drill_color
-        self._render_circle(circle, color)
-
-    def _render_slot(self, slot, color):
-        start = map(mul, slot.start, self.scale)
-        end = map(mul, slot.end, self.scale)
-
-        width = slot.diameter
-
-        self.ctx.set_operator(cairo.OPERATOR_OVER
-                              if slot.level_polarity == 'dark' and
-                                 (not self.invert) else cairo.OPERATOR_CLEAR)
-        with self._clip_primitive(slot):
-            with self._new_mask() as mask:
-                mask.ctx.set_line_width(width * self.scale[0])
-                mask.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
-                mask.ctx.move_to(*start)
-                mask.ctx.line_to(*end)
-                mask.ctx.stroke()
-                self.ctx.mask_surface(mask.surface, self.origin_in_pixels[0])
-
-    def _render_amgroup(self, amgroup, color):
-        # Since holes/clear areas in the mask group must be drawn as clear, we need to render the primitives of this
-        # group into a mask context first, then composite this mask context on top of our output surface. This means
-        # that a clear primitive inside the group will cover/draw over dark primitives inside the group, but it will
-        # *not* cover/draw over dark primitives outside the group.
-
-        mask_surface = cairo.SVGSurface(None, self.size_in_pixels[0], self.size_in_pixels[1])
-        mask_ctx = cairo.Context(mask_surface)
-        mask_ctx.set_matrix(self.ctx.get_matrix())
-
-        old_surface, self.surface = self.surface, mask_surface
-        old_ctx, self.ctx = self.ctx, mask_ctx
-
-        for primitive in amgroup.primitives:
-            self.render(primitive)
-
-        old_ctx.mask_surface(mask_surface, self.origin_in_pixels[0])
-        mask_surface.finish()
-        self.surface, self.ctx = old_surface, old_ctx
-
-    def _render_test_record(self, primitive, color):
-        position = [pos + origin for pos, origin in
-                    zip(primitive.position, self.origin_in_inch)]
-        self.ctx.select_font_face(
-            'monospace', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD)
-        self.ctx.set_font_size(13)
-        self._render_circle(Circle(position, 0.015), 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 + 0.015) for coord in position])
-        self.ctx.scale(1, -1)
-        self.ctx.show_text(primitive.net_name)
-        self.ctx.scale(1, -1)
-
-    def new_render_layer(self, color=None, mirror=False):
-        size_in_pixels = self.scale_point(self.size_in_inch)
-        m = self._xform_matrix
-        matrix = cairo.Matrix(m.xx, m.yx, m.xy, m.yy, m.x0, m.y0)
-        layer = cairo.SVGSurface(None, size_in_pixels[0], size_in_pixels[1])
-        ctx = cairo.Context(layer)
-
-        if self.invert:
-            ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
-            ctx.set_operator(cairo.OPERATOR_OVER)
-            ctx.paint()
-        if mirror:
-            matrix.xx = -1.0
-            matrix.x0 = self.origin_in_pixels[0] + self.size_in_pixels[0]
-        self.ctx = ctx
-        self.ctx.set_matrix(matrix)
-        self.active_layer = layer
-        self.active_matrix = matrix
-
-    def flatten(self, color=None, alpha=None):
-        color = color if color is not None else self.color
-        alpha = alpha if alpha is not None else self.alpha
-        self.output_ctx.set_source_rgba(color[0], color[1], color[2], alpha)
-        self.output_ctx.mask_surface(self.active_layer)
-        self.ctx = None
-        self.active_layer = None
-        self.active_matrix = None
-
-    def paint_background(self, settings=None):
-        color = settings.color if settings is not None else self.background_color
-        alpha = settings.alpha if settings is not None else 1.0
-        if not self.has_bg:
-            self.has_bg = True
-            self.output_ctx.set_source_rgba(color[0], color[1], color[2], alpha)
-            self.output_ctx.paint()
-
-    def _clip_primitive(self, primitive):
-        """ Clip rendering context to pixel-aligned bounding box
-
-        Calculates pixel- and axis- aligned bounding box, and clips current
-        context to that region. Improves rendering speed significantly. This
-        returns a context manager, use as follows:
-
-            with self._clip_primitive(some_primitive):
-                do_rendering_stuff()
-                do_more_rendering stuff(with, arguments)
-
-        The context manager will reset the context's clipping region when it
-        goes out of scope.
-
-        """
-        class Clip:
-            def __init__(clp, primitive):
-                (xmin, ymin), (xmax, ymax) = primitive.bounding_box
-
-                # Round bounds to the nearest pixel outside of the primitive
-                clp.xmin = math.floor(self.scale[0] * xmin)
-                clp.xmax = math.ceil(self.scale[0] * xmax)
-
-                # We need to offset Y to take care of the difference in y-pos
-                # caused by flipping the axis.
-                clp.ymin = math.floor(
-                    (self.scale[1] * ymin) - math.ceil(self.origin_in_pixels[1]))
-                clp.ymax = math.ceil(
-                    (self.scale[1] * ymax) - math.floor(self.origin_in_pixels[1]))
-
-                # Calculate width and height, rounded to the nearest pixel
-                clp.width = abs(clp.xmax - clp.xmin)
-                clp.height = abs(clp.ymax - clp.ymin)
-
-            def __enter__(clp):
-                # Clip current context to primitive's bounding box
-                self.ctx.rectangle(clp.xmin, clp.ymin, clp.width, clp.height)
-                self.ctx.clip()
-
-            def __exit__(clp, exc_type, exc_val, traceback):
-                # Reset context clip region
-                self.ctx.reset_clip()
-
-        return Clip(primitive)
-
-    def scale_point(self, point):
-        return tuple([coord * scale for coord, scale in zip(point, self.scale)])