diff options
Diffstat (limited to 'gerber/render/cairo_backend.py')
| -rw-r--r-- | gerber/render/cairo_backend.py | 172 |
1 files changed, 90 insertions, 82 deletions
diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py index 2370eb9..df4fcf1 100644 --- a/gerber/render/cairo_backend.py +++ b/gerber/render/cairo_backend.py @@ -17,6 +17,7 @@ import cairocffi as cairo
+import os
import tempfile
import copy
@@ -36,16 +37,16 @@ class GerberCairoContext(GerberContext): 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.bg = False
- self.mask = None
- self.mask_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):
@@ -66,10 +67,8 @@ class GerberCairoContext(GerberContext): self.size_in_inch = size_in_inch if self.size_in_inch is None else self.size_in_inch
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.surface = cairo.SVGSurface(self.surface_buffer, size_in_pixels[0], size_in_pixels[1])
self.output_ctx = cairo.Context(self.surface)
- self.output_ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
self.output_ctx.scale(1, -1)
self.output_ctx.translate(-(origin_in_inch[0] * self.scale[0]),
(-origin_in_inch[1] * self.scale[0]) - size_in_pixels[1])
@@ -77,20 +76,44 @@ class GerberCairoContext(GerberContext): x0=-self.origin_in_pixels[0],
y0=self.size_in_pixels[1] + self.origin_in_pixels[1])
- def render_layers(self, layers, filename, theme=THEMES['default']):
+ def render_layer(self, layer, filename=None, settings=None, bgsettings=None,
+ verbose=False):
+ 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()
+ 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):
""" Render a set of layers
"""
- self.set_bounds(layers[0].bounds, True)
- self._paint_background(True)
-
+ self.clear()
+ bgsettings = theme['background']
for layer in layers:
- self._render_layer(layer, theme)
- self.dump(filename)
+ 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):
+ def dump(self, filename, verbose=False):
""" Save image as `filename`
"""
- is_svg = filename.lower().endswith(".svg")
+ is_svg = os.path.splitext(filename.lower())[1] == '.svg'
+ if verbose:
+ print('[Render]: Writing image to {}'.format(filename))
if is_svg:
self.surface.finish()
self.surface_buffer.flush()
@@ -115,30 +138,33 @@ class GerberCairoContext(GerberContext): self.surface_buffer.flush()
return self.surface_buffer.read()
- def _render_layer(self, layer, theme=THEMES['default']):
- settings = theme.get(layer.layer_class, RenderSettings())
- self.color = settings.color
- self.alpha = settings.alpha
- self.invert = settings.invert
+ 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
+ if hasattr(self.surface_buffer, 'close'):
+ self.surface_buffer.close()
+ self.surface_buffer = None
+ 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()
+ self._paint(settings.color, settings.alpha)
def _render_line(self, line, color):
start = [pos * scale for pos, scale in zip(line.start, self.scale)]
end = [pos * scale for pos, scale in zip(line.end, self.scale)]
- if not self.invert:
- self.ctx.set_source_rgba(*color, alpha=self.alpha)
- self.ctx.set_operator(cairo.OPERATOR_OVER
- if line.level_polarity == 'dark'
- else cairo.OPERATOR_CLEAR)
- else:
- self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
- self.ctx.set_operator(cairo.OPERATOR_CLEAR)
+ self.ctx.set_operator(cairo.OPERATOR_SOURCE
+ if line.level_polarity == 'dark' and
+ (not self.invert) else cairo.OPERATOR_CLEAR)
if isinstance(line.aperture, Circle):
width = line.aperture.diameter
self.ctx.set_line_width(width * self.scale[0])
@@ -162,14 +188,9 @@ class GerberCairoContext(GerberContext): angle1 = arc.start_angle
angle2 = arc.end_angle
width = arc.aperture.diameter if arc.aperture.diameter != 0 else 0.001
- if not self.invert:
- self.ctx.set_source_rgba(*color, alpha=self.alpha)
- self.ctx.set_operator(cairo.OPERATOR_OVER
- if arc.level_polarity == 'dark'
- else cairo.OPERATOR_CLEAR)
- else:
- self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
- self.ctx.set_operator(cairo.OPERATOR_CLEAR)
+ self.ctx.set_operator(cairo.OPERATOR_SOURCE
+ 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...
@@ -181,14 +202,9 @@ class GerberCairoContext(GerberContext): self.ctx.move_to(*end) # ...lame
def _render_region(self, region, color):
- if not self.invert:
- self.ctx.set_source_rgba(*color, alpha=self.alpha)
- self.ctx.set_operator(cairo.OPERATOR_OVER
- if region.level_polarity == 'dark'
- else cairo.OPERATOR_CLEAR)
- else:
- self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
- self.ctx.set_operator(cairo.OPERATOR_CLEAR)
+ self.ctx.set_operator(cairo.OPERATOR_SOURCE
+ if region.level_polarity == 'dark' and
+ (not self.invert) else cairo.OPERATOR_CLEAR)
self.ctx.set_line_width(0)
self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
self.ctx.move_to(*self.scale_point(region.primitives[0].start))
@@ -210,29 +226,22 @@ class GerberCairoContext(GerberContext): def _render_circle(self, circle, color):
center = self.scale_point(circle.position)
- if not self.invert:
- self.ctx.set_source_rgba(*color, alpha=self.alpha)
- self.ctx.set_operator(
- cairo.OPERATOR_OVER if circle.level_polarity == 'dark' else cairo.OPERATOR_CLEAR)
- else:
- self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
- self.ctx.set_operator(cairo.OPERATOR_CLEAR)
+ self.ctx.set_operator(cairo.OPERATOR_SOURCE
+ 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 *
- self.scale[0], 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):
lower_left = self.scale_point(rectangle.lower_left)
- width, height = tuple([abs(coord) for coord in self.scale_point((rectangle.width, rectangle.height))])
-
- if not self.invert:
- self.ctx.set_source_rgba(*color, alpha=self.alpha)
- self.ctx.set_operator(
- cairo.OPERATOR_OVER if rectangle.level_polarity == 'dark' else cairo.OPERATOR_CLEAR)
- else:
- self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
- self.ctx.set_operator(cairo.OPERATOR_CLEAR)
+ width, height = tuple([abs(coord) for coord in
+ self.scale_point((rectangle.width,
+ rectangle.height))])
+ self.ctx.set_operator(cairo.OPERATOR_SOURCE
+ if rectangle.level_polarity == 'dark' and
+ (not self.invert) else cairo.OPERATOR_CLEAR)
self.ctx.set_line_width(0)
self.ctx.rectangle(*lower_left, width=width, height=height)
self.ctx.fill()
@@ -247,34 +256,31 @@ class GerberCairoContext(GerberContext): self._render_circle(circle, color)
def _render_test_record(self, primitive, color):
- position = [pos + origin for pos, origin in zip(primitive.position, self.origin_in_inch)]
- self.ctx.set_operator(cairo.OPERATOR_OVER)
+ 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_source_rgba(*color, alpha=self.alpha)
- self.ctx.set_operator(
- cairo.OPERATOR_OVER if primitive.level_polarity == 'dark' else cairo.OPERATOR_CLEAR)
- self.ctx.move_to(*[self.scale[0] * (coord + 0.015)
- for coord in position])
+ self.ctx.set_operator(cairo.OPERATOR_SOURCE
+ 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)
+ matrix = copy.copy(self._xform_matrix)
layer = cairo.SVGSurface(None, size_in_pixels[0], size_in_pixels[1])
ctx = cairo.Context(layer)
- ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
ctx.scale(1, -1)
ctx.translate(-(self.origin_in_inch[0] * self.scale[0]),
- (-self.origin_in_inch[1] * self.scale[0]) - size_in_pixels[1])
+ (-self.origin_in_inch[1] * self.scale[0]) - size_in_pixels[1])
if self.invert:
ctx.set_operator(cairo.OPERATOR_OVER)
- ctx.set_source_rgba(*self.color, alpha=self.alpha)
ctx.paint()
- matrix = copy.copy(self._xform_matrix)
if mirror:
matrix.xx = -1.0
matrix.x0 = self.origin_in_pixels[0] + self.size_in_pixels[0]
@@ -282,21 +288,23 @@ class GerberCairoContext(GerberContext): self.active_layer = layer
self.active_matrix = matrix
- def _flatten(self):
- self.output_ctx.set_operator(cairo.OPERATOR_OVER)
+ def _paint(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
ptn = cairo.SurfacePattern(self.active_layer)
ptn.set_matrix(self.active_matrix)
- self.output_ctx.set_source(ptn)
- self.output_ctx.paint()
+ self.output_ctx.set_source_rgba(*color, alpha=alpha)
+ self.output_ctx.mask(ptn)
self.ctx = None
self.active_layer = None
self.active_matrix = None
- def _paint_background(self, force=False):
- if (not self.bg) or force:
- self.bg = True
- self.output_ctx.set_operator(cairo.OPERATOR_OVER)
- self.output_ctx.set_source_rgba(*self.background_color, alpha=1.0)
+ 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, alpha=alpha)
self.output_ctx.paint()
def scale_point(self, point):
|