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-rw-r--r--gerber/cam.py7
-rw-r--r--gerber/primitives.py32
-rw-r--r--gerber/render/cairo_backend.py114
-rw-r--r--gerber/render/render.py9
-rw-r--r--gerber/rs274x.py31
-rw-r--r--gerber/tests/test_primitives.py34
6 files changed, 141 insertions, 86 deletions
diff --git a/gerber/cam.py b/gerber/cam.py
index 23d8214..c567055 100644
--- a/gerber/cam.py
+++ b/gerber/cam.py
@@ -254,8 +254,11 @@ class CamFile(object):
filename : string <optional>
If provided, save the rendered image to `filename`
"""
- bounds = [tuple([x * 1.2, y*1.2]) for x, y in self.bounds]
- ctx.set_bounds(bounds)
+ ctx.set_bounds(self.bounds)
+ ctx._paint_background()
+ if ctx.invert:
+ ctx._paint_inverted_layer()
+
for p in self.primitives:
ctx.render(p)
if filename is not None:
diff --git a/gerber/primitives.py b/gerber/primitives.py
index 00ecb12..0ac12af 100644
--- a/gerber/primitives.py
+++ b/gerber/primitives.py
@@ -63,7 +63,10 @@ class Primitive(object):
else:
try:
if len(value) > 1:
- if isinstance(value[0], tuple):
+ if hasattr(value[0], 'to_inch'):
+ for v in value:
+ v.to_inch()
+ elif isinstance(value[0], tuple):
setattr(self, attr, [tuple(map(inch, point)) for point in value])
else:
setattr(self, attr, tuple(map(inch, value)))
@@ -81,7 +84,10 @@ class Primitive(object):
else:
try:
if len(value) > 1:
- if isinstance(value[0], tuple):
+ if hasattr(value[0], 'to_metric'):
+ for v in value:
+ v.to_metric()
+ elif isinstance(value[0], tuple):
setattr(self, attr, [tuple(map(metric, point)) for point in value])
else:
setattr(self, attr, tuple(map(metric, value)))
@@ -584,23 +590,25 @@ class Polygon(Primitive):
class Region(Primitive):
"""
"""
- def __init__(self, points, **kwargs):
+ def __init__(self, primitives, **kwargs):
super(Region, self).__init__(**kwargs)
- self.points = points
- self._to_convert = ['points']
+ self.primitives = primitives
+ self._to_convert = ['primitives']
@property
def bounding_box(self):
- x_list, y_list = zip(*self.points)
- min_x = min(x_list)
- max_x = max(x_list)
- min_y = min(y_list)
- max_y = max(y_list)
+ xlims, ylims = zip(*[p.bounding_box for p in self.primitives])
+ minx, maxx = zip(*xlims)
+ miny, maxy = zip(*ylims)
+ min_x = min(minx)
+ max_x = max(maxx)
+ min_y = min(miny)
+ max_y = max(maxy)
return ((min_x, max_x), (min_y, max_y))
def offset(self, x_offset=0, y_offset=0):
- self.points = [tuple(map(add, point, (x_offset, y_offset)))
- for point in self.points]
+ for p in self.primitives:
+ p.offset(x_offset, y_offset)
class RoundButterfly(Primitive):
diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py
index fa1aecc..a97e552 100644
--- a/gerber/render/cairo_backend.py
+++ b/gerber/render/cairo_backend.py
@@ -16,53 +16,45 @@
# limitations under the License.
from .render import GerberContext
-from operator import mul
+
import cairocffi as cairo
+
+from operator import mul
import math
+import tempfile
from ..primitives import *
-SCALE = 4000.
-
-
class GerberCairoContext(GerberContext):
- def __init__(self, surface=None, size=(10000, 10000)):
+ def __init__(self, scale=300):
GerberContext.__init__(self)
- if surface is None:
- self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
- size[0], size[1])
- else:
- self.surface = surface
- self.ctx = cairo.Context(self.surface)
- self.size = size
- self.ctx.translate(0, self.size[1])
- self.scale = (SCALE,SCALE)
- self.ctx.scale(1, -1)
- self.apertures = {}
- self.background = False
-
+ self.scale = (scale, scale)
+ self.surface = None
+ self.ctx = None
+ self.bg = False
+
def set_bounds(self, bounds):
- if not self.background:
- xbounds, ybounds = bounds
- width = SCALE * (xbounds[1] - xbounds[0])
- height = SCALE * (ybounds[1] - ybounds[0])
- self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, int(width), int(height))
+ 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)
+
+ 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.translate(0, height)
- self.scale = (SCALE,SCALE)
+ self.ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
self.ctx.scale(1, -1)
- self.ctx.rectangle(SCALE * xbounds[0], SCALE * ybounds[0], width, height)
- self.ctx.set_source_rgb(0,0,0)
- self.ctx.fill()
- self.background = True
+ 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)
end = map(mul, line.end, self.scale)
if isinstance(line.aperture, Circle):
- width = line.aperture.diameter if line.aperture.diameter != 0 else 0.001
+ width = line.aperture.diameter
self.ctx.set_source_rgba(*color, alpha=self.alpha)
- self.ctx.set_line_width(width * SCALE)
+ self.ctx.set_operator(cairo.OPERATOR_OVER if (line.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
+ self.ctx.set_line_width(width * self.scale[0])
self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
self.ctx.move_to(*start)
self.ctx.line_to(*end)
@@ -70,6 +62,7 @@ class GerberCairoContext(GerberContext):
elif isinstance(line.aperture, Rectangle):
points = [tuple(map(mul, x, self.scale)) for x in line.vertices]
self.ctx.set_source_rgba(*color, alpha=self.alpha)
+ self.ctx.set_operator(cairo.OPERATOR_OVER if (line.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
self.ctx.set_line_width(0)
self.ctx.move_to(*points[0])
for point in points[1:]:
@@ -80,12 +73,13 @@ class GerberCairoContext(GerberContext):
center = map(mul, arc.center, self.scale)
start = map(mul, arc.start, self.scale)
end = map(mul, arc.end, self.scale)
- radius = SCALE * arc.radius
+ radius = self.scale[0] * arc.radius
angle1 = arc.start_angle
angle2 = arc.end_angle
width = arc.aperture.diameter if arc.aperture.diameter != 0 else 0.001
self.ctx.set_source_rgba(*color, alpha=self.alpha)
- self.ctx.set_line_width(width * SCALE)
+ self.ctx.set_operator(cairo.OPERATOR_OVER if (arc.level_polarity == "dark" and not self.invert)else cairo.OPERATOR_CLEAR)
+ self.ctx.set_line_width(width * self.scale[0])
self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
self.ctx.move_to(*start) # You actually have to do this...
if arc.direction == 'counterclockwise':
@@ -95,25 +89,40 @@ class GerberCairoContext(GerberContext):
self.ctx.move_to(*end) # ...lame
def _render_region(self, region, color):
- points = [tuple(map(mul, point, self.scale)) for point in region.points]
self.ctx.set_source_rgba(*color, alpha=self.alpha)
+ self.ctx.set_operator(cairo.OPERATOR_OVER if (region.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
self.ctx.set_line_width(0)
- self.ctx.move_to(*points[0])
- for point in points[1:]:
- self.ctx.line_to(*point)
+ self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
+ self.ctx.move_to(*tuple(map(mul, region.primitives[0].start, self.scale)))
+ for p in region.primitives:
+ if isinstance(p, Line):
+ self.ctx.line_to(*tuple(map(mul, p.end, self.scale)))
+ else:
+ center = map(mul, p.center, self.scale)
+ start = map(mul, p.start, self.scale)
+ end = map(mul, p.end, self.scale)
+ radius = self.scale[0] * p.radius
+ angle1 = p.start_angle
+ angle2 = p.end_angle
+ if p.direction == 'counterclockwise':
+ self.ctx.arc(*center, radius=radius, angle1=angle1, angle2=angle2)
+ else:
+ self.ctx.arc_negative(*center, radius=radius, angle1=angle1, angle2=angle2)
self.ctx.fill()
def _render_circle(self, circle, color):
center = tuple(map(mul, circle.position, self.scale))
self.ctx.set_source_rgba(*color, alpha=self.alpha)
+ self.ctx.set_operator(cairo.OPERATOR_OVER if (circle.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
self.ctx.set_line_width(0)
- self.ctx.arc(*center, radius=circle.radius * SCALE, angle1=0, angle2=2 * math.pi)
+ self.ctx.arc(*center, radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi)
self.ctx.fill()
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_rgba(*color, alpha=self.alpha)
+ self.ctx.set_operator(cairo.OPERATOR_OVER if (rectangle.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
self.ctx.set_line_width(0)
self.ctx.rectangle(*ll,width=width, height=height)
self.ctx.fill()
@@ -131,10 +140,35 @@ class GerberCairoContext(GerberContext):
self.ctx.set_font_size(200)
self._render_circle(Circle(primitive.position, 0.01), color)
self.ctx.set_source_rgb(*color)
- self.ctx.move_to(*[SCALE * (coord + 0.01) for coord in primitive.position])
+ 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 + 0.01) for coord in primitive.position])
self.ctx.scale(1, -1)
self.ctx.show_text(primitive.net_name)
self.ctx.scale(1, -1)
+ def _paint_inverted_layer(self):
+ self.ctx.set_source_rgba(*self.background_color)
+ self.ctx.set_operator(cairo.OPERATOR_OVER)
+ self.ctx.paint()
+ self.ctx.set_operator(cairo.OPERATOR_CLEAR)
+
+ def _paint_background(self):
+ if not self.bg:
+ self.bg = True
+ self.ctx.set_source_rgba(*self.background_color)
+ self.ctx.paint()
+
def dump(self, filename):
- self.surface.write_to_png(filename)
+ is_svg = filename.lower().endswith(".svg")
+
+ if is_svg:
+ self.surface.finish()
+ self.surface_buffer.flush()
+
+ with open(filename, "w") as f:
+ self.surface_buffer.seek(0)
+ f.write(self.surface_buffer.read())
+ f.flush()
+
+ else:
+ self.surface.write_to_png(filename)
diff --git a/gerber/render/render.py b/gerber/render/render.py
index 68c2115..124e743 100644
--- a/gerber/render/render.py
+++ b/gerber/render/render.py
@@ -62,6 +62,7 @@ class GerberContext(object):
self._drill_color = (0.25, 0.25, 0.25)
self._background_color = (0.0, 0.0, 0.0)
self._alpha = 1.0
+ self._invert = False
@property
def units(self):
@@ -122,6 +123,14 @@ class GerberContext(object):
raise ValueError('Alpha must be between 0.0 and 1.0')
self._alpha = alpha
+ @property
+ def invert(self):
+ return self._invert
+
+ @invert.setter
+ def invert(self, invert):
+ self._invert = invert
+
def render(self, primitive):
color = (self.color if primitive.level_polarity == 'dark'
else self.background_color)
diff --git a/gerber/rs274x.py b/gerber/rs274x.py
index b4963d1..1df3646 100644
--- a/gerber/rs274x.py
+++ b/gerber/rs274x.py
@@ -468,22 +468,29 @@ class GerberParser(object):
stmt.op = self.op
if self.op == "D01":
- if self.region_mode == 'on':
- if self.current_region is None:
- self.current_region = [(self.x, self.y), ]
- self.current_region.append((x, y,))
- else:
- start = (self.x, self.y)
- end = (x, y)
+ start = (self.x, self.y)
+ end = (x, y)
- if self.interpolation == 'linear':
+ if self.interpolation == 'linear':
+ if self.region_mode == 'off':
self.primitives.append(Line(start, end, self.apertures[self.aperture], level_polarity=self.level_polarity, units=self.settings.units))
else:
- i = 0 if stmt.i is None else stmt.i
- j = 0 if stmt.j is None else stmt.j
- center = (start[0] + i, start[1] + j)
+ if self.current_region is None:
+ self.current_region = [Line(start, end, self.apertures[self.aperture], level_polarity=self.level_polarity, units=self.settings.units),]
+ else:
+ self.current_region.append(Line(start, end, self.apertures[self.aperture], level_polarity=self.level_polarity, units=self.settings.units))
+ else:
+ i = 0 if stmt.i is None else stmt.i
+ j = 0 if stmt.j is None else stmt.j
+ center = (start[0] + i, start[1] + j)
+ if self.region_mode == 'off':
self.primitives.append(Arc(start, end, center, self.direction, self.apertures[self.aperture], level_polarity=self.level_polarity, units=self.settings.units))
-
+ else:
+ if self.current_region is None:
+ self.current_region = [Arc(start, end, center, self.direction, self.apertures[self.aperture], level_polarity=self.level_polarity, units=self.settings.units),]
+ else:
+ self.current_region.append(Arc(start, end, center, self.direction, self.apertures[self.aperture], level_polarity=self.level_polarity, units=self.settings.units))
+
elif self.op == "D02":
pass
diff --git a/gerber/tests/test_primitives.py b/gerber/tests/test_primitives.py
index 67c7822..f8a32da 100644
--- a/gerber/tests/test_primitives.py
+++ b/gerber/tests/test_primitives.py
@@ -4,6 +4,7 @@
# Author: Hamilton Kibbe <ham@hamiltonkib.be>
from ..primitives import *
from .tests import *
+from operator import add
def test_primitive_smoketest():
@@ -766,38 +767,31 @@ def test_polygon_offset():
def test_region_ctor():
""" Test Region creation
"""
+ apt = Circle((0,0), 0)
+ lines = (Line((0,0), (1,0), apt), Line((1,0), (1,1), apt), Line((1,1), (0,1), apt), Line((0,1), (0,0), apt))
points = ((0, 0), (1,0), (1,1), (0,1))
- r = Region(points)
- for i, point in enumerate(points):
- assert_array_almost_equal(r.points[i], point)
+ r = Region(lines)
+ for i, p in enumerate(lines):
+ assert_equal(r.primitives[i], p)
def test_region_bounds():
""" Test region bounding box calculation
"""
- points = ((0, 0), (1,0), (1,1), (0,1))
- r = Region(points)
+ apt = Circle((0,0), 0)
+ lines = (Line((0,0), (1,0), apt), Line((1,0), (1,1), apt), Line((1,1), (0,1), apt), Line((0,1), (0,0), apt))
+ r = Region(lines)
xbounds, ybounds = r.bounding_box
assert_array_almost_equal(xbounds, (0, 1))
assert_array_almost_equal(ybounds, (0, 1))
-def test_region_conversion():
- points = ((2.54, 25.4), (254.0,2540.0), (25400.0,254000.0), (2.54,25.4))
- r = Region(points, units='metric')
- r.to_inch()
- assert_equal(set(r.points), {(0.1, 1.0), (10.0, 100.0), (1000.0, 10000.0)})
-
- points = ((0.1, 1.0), (10.0, 100.0), (1000.0, 10000.0), (0.1, 1.0))
- r = Region(points, units='inch')
- r.to_metric()
- assert_equal(set(r.points), {(2.54, 25.4), (254.0, 2540.0), (25400.0, 254000.0)})
def test_region_offset():
- points = ((0, 0), (1,0), (1,1), (0,1))
- r = Region(points)
- r.offset(1, 0)
- assert_equal(set(r.points), {(1, 0), (2, 0), (2,1), (1, 1)})
+ apt = Circle((0,0), 0)
+ lines = (Line((0,0), (1,0), apt), Line((1,0), (1,1), apt), Line((1,1), (0,1), apt), Line((0,1), (0,0), apt))
+ r = Region(lines)
+ xlim, ylim = r.bounding_box
r.offset(0, 1)
- assert_equal(set(r.points), {(1, 1), (2, 1), (2,2), (1, 2)})
+ assert_array_almost_equal((xlim, tuple([y+1 for y in ylim])), r.bounding_box)
def test_round_butterfly_ctor():
""" Test round butterfly creation