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-rw-r--r--gerber/render/render.py86
-rw-r--r--gerber/render/svgwrite_backend.py8
2 files changed, 91 insertions, 3 deletions
diff --git a/gerber/render/render.py b/gerber/render/render.py
index e91c71e..8cfc5de 100644
--- a/gerber/render/render.py
+++ b/gerber/render/render.py
@@ -23,7 +23,60 @@ from ..gerber_statements import (CommentStmt, UnknownStmt, EofStmt, ParamStmt,
class GerberContext(object):
-
+ """ Gerber rendering context base class
+
+ Provides basic functionality and API for rendering gerber files. Medium-
+ specific renderers should subclass GerberContext and implement the drawing
+ functions. Colors are stored internally as 32-bit RGB and may need to be
+ converted to a native format in the rendering subclass.
+
+ Attributes
+ ----------
+ settings : FileSettings (dict-like)
+ Gerber file settings
+
+ x : float
+ X-coordinate of the "photoplotter" head.
+
+ y : float
+ Y-coordinate of the "photoplotter" head
+
+ aperture : int
+ The aperture that is currently in use
+
+ interpolation : str
+ Current interpolation mode. may be 'linear' or 'arc'
+
+ direction : string
+ Current arc direction. May be either 'clockwise' or 'counterclockwise'
+
+ image_polarity : string
+ Current image polarity setting. May be 'positive' or 'negative'
+
+ level_polarity : string
+ Level polarity. May be 'dark' or 'clear'. Dark polarity indicates the
+ existance of copper/silkscreen/etc. in the exposed area, whereas clear
+ polarity indicates material should be removed from the exposed area.
+
+ region_mode : string
+ Region mode. May be 'on' or 'off'. When region mode is set to 'on' the
+ following "contours" define the outline of a region. When region mode
+ is subsequently turned 'off', the defined area is filled.
+
+ quadrant_mode : string
+ Quadrant mode. May be 'single-quadrant' or 'multi-quadrant'. Defines
+ how arcs are specified.
+
+ color : tuple (<float>, <float>, <float>)
+ Color used for rendering as a tuple of normalized (red, green, blue) values.
+
+ drill_color : tuple (<float>, <float>, <float>)
+ Color used for rendering drill hits. Format is the same as for `color`.
+
+ background_color : tuple (<float>, <float>, <float>)
+ Color of the background. Used when exposing areas in 'clear' level
+ polarity mode. Format is the same as for `color`.
+ """
def __init__(self):
self.settings = {}
self.x = 0
@@ -35,13 +88,36 @@ class GerberContext(object):
self.image_polarity = 'positive'
self.level_polarity = 'dark'
self.region_mode = 'off'
+ self.quadrant_mode = 'multi-quadrant'
+
self.color = (0.7215, 0.451, 0.200)
self.drill_color = (0.25, 0.25, 0.25)
+ self.background_color = (0.0, 0.0, 0.0)
def set_format(self, settings):
+ """ Set source file format.
+
+ Parameters
+ ----------
+ settings : FileSettings instance or dict-like
+ Gerber file settings used in source file.
+ """
self.settings = settings
def set_coord_format(self, zero_suppression, format, notation):
+ """ Set coordinate format used in source gerber file
+
+ Parameters
+ ----------
+ zero_suppression : string
+ Zero suppression mode. may be 'leading' or 'trailling'
+
+ format : tuple (<int>, <int>)
+ decimal precision format
+
+ notation : string
+ notation mode. 'absolute' or 'incremental'
+ """
self.settings['zero_suppression'] = zero_suppression
self.settings['format'] = format
self.settings['notation'] = notation
@@ -69,6 +145,9 @@ class GerberContext(object):
def set_drill_color(self, color):
self.drill_color = color
+
+ def set_background_color(self, color):
+ self.background_color = color
def resolve(self, x, y):
x = x if x is not None else self.x
@@ -120,6 +199,8 @@ class GerberContext(object):
def _evaluate_mode(self, stmt):
if stmt.type == 'RegionMode':
+ if self.region_mode == 'on' and stmt.mode == 'off':
+ self._fill_region()
self.region_mode = stmt.mode
elif stmt.type == 'QuadrantMode':
self.quadrant_mode = stmt.mode
@@ -153,3 +234,6 @@ class GerberContext(object):
def _evaluate_aperture(self, stmt):
self.set_aperture(stmt.d)
+
+ def _fill_region(self):
+ pass
diff --git a/gerber/render/svgwrite_backend.py b/gerber/render/svgwrite_backend.py
index 3b2f3c1..7570c84 100644
--- a/gerber/render/svgwrite_backend.py
+++ b/gerber/render/svgwrite_backend.py
@@ -152,7 +152,9 @@ class GerberSvgContext(GerberContext):
ap = self.apertures.get(self.aperture, None)
if ap is None:
return
- self.dwg.add(ap.line(self, x, y, convert_color(self.color)))
+ color = (convert_color(self.color) if self.level_polarity == 'dark'
+ else convert_color(self.background_color))
+ self.dwg.add(ap.line(self, x, y, color))
self.move(x, y, resolve=False)
def arc(self, x, y, i, j):
@@ -171,7 +173,9 @@ class GerberSvgContext(GerberContext):
ap = self.apertures.get(self.aperture, None)
if ap is None:
return
- for shape in ap.flash(self, x, y, convert_color(self.color)):
+ color = (convert_color(self.color) if self.level_polarity == 'dark'
+ else convert_color(self.background_color))
+ for shape in ap.flash(self, x, y, color):
self.dwg.add(shape)
self.move(x, y, resolve=False)