From 8c5c7ec8bbc8a074884ef04b566f9c0ecd6e78bb Mon Sep 17 00:00:00 2001
From: Hamilton Kibbe <hamilton.kibbe@gmail.com>
Date: Sun, 12 Oct 2014 12:38:40 -0400
Subject: update docs and example images
---
gerber/render/render.py | 19 ++++++++++++++++++-
gerber/render/svgwrite_backend.py | 7 +++++++
2 files changed, 25 insertions(+), 1 deletion(-)
(limited to 'gerber/render')
diff --git a/gerber/render/render.py b/gerber/render/render.py
index 48a53f8..f7e4485 100644
--- a/gerber/render/render.py
+++ b/gerber/render/render.py
@@ -83,6 +83,9 @@ class GerberContext(object):
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`.
+
+ alpha : float
+ Rendering opacity. Between 0.0 (transparent) and 1.0 (opaque.)
"""
def __init__(self):
self.settings = {}
@@ -100,7 +103,8 @@ class GerberContext(object):
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)
-
+ self.alpha = 1.0
+
def set_format(self, settings):
""" Set source file format.
@@ -260,6 +264,19 @@ class GerberContext(object):
"""
self.background_color = color
+ def set_alpha(self, alpha):
+ """ Set layer rendering opacity
+
+ .. note::
+ Not all backends/rendering devices support this parameter.
+
+ Parameters
+ ----------
+ alpha : float
+ Rendering opacity. must be between 0.0 (transparent) and 1.0 (opaque)
+ """
+ self.alpha = alpha
+
def resolve(self, x, y):
""" Resolve missing x or y coordinates in a coordinate command.
diff --git a/gerber/render/svgwrite_backend.py b/gerber/render/svgwrite_backend.py
index 886b4f8..78961da 100644
--- a/gerber/render/svgwrite_backend.py
+++ b/gerber/render/svgwrite_backend.py
@@ -117,6 +117,7 @@ class GerberSvgContext(GerberContext):
self.apertures = {}
self.dwg = svgwrite.Drawing()
+ self.dwg.transform = 'scale 1 -1'
self.background = False
self.region_path = None
@@ -124,11 +125,17 @@ class GerberSvgContext(GerberContext):
xbounds, ybounds = bounds
size = (SCALE * (xbounds[1] - xbounds[0]), SCALE * (ybounds[1] - ybounds[0]))
if not self.background:
+ self.dwg = svgwrite.Drawing(viewBox='%f, %f, %f, %f' % (SCALE*xbounds[0], -SCALE*ybounds[1],size[0], size[1]))
self.dwg.add(self.dwg.rect(insert=(SCALE * xbounds[0],
-SCALE * ybounds[1]),
size=size, fill=convert_color(self.background_color)))
self.background = True
+ def set_alpha(self, alpha):
+ super(GerberSvgContext, self).set_alpha(alpha)
+ import warnings
+ warnings.warn('SVG output does not support transparency')
+
def define_aperture(self, d, shape, modifiers):
aperture = None
if shape == 'C':
--
cgit