diff options
Diffstat (limited to 'gerber/render/cairo_backend.py')
| -rw-r--r-- | gerber/render/cairo_backend.py | 142 |
1 files changed, 91 insertions, 51 deletions
diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py index 345f331..c8f94ff 100644 --- a/gerber/render/cairo_backend.py +++ b/gerber/render/cairo_backend.py @@ -25,6 +25,7 @@ import tempfile from ..primitives import *
+
class GerberCairoContext(GerberContext):
def __init__(self, scale=300):
GerberContext.__init__(self)
@@ -32,12 +33,17 @@ class GerberCairoContext(GerberContext): self.surface = None
self.ctx = None
self.bg = False
-
+ self.mask = None
+ self.mask_ctx = None
+ self.origin_in_pixels = None
+ self.size_in_pixels = None
+
def set_bounds(self, bounds):
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)
-
+ self.origin_in_pixels = tuple(map(mul, origin_in_inch, self.scale)) if self.origin_in_pixels is None else self.origin_in_pixels
+ self.size_in_pixels = size_in_pixels if self.size_in_pixels is None else self.size_in_pixels
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])
@@ -45,29 +51,37 @@ class GerberCairoContext(GerberContext): self.ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
self.ctx.scale(1, -1)
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])
+ self.mask = cairo.SVGSurface(None, size_in_pixels[0], size_in_pixels[1])
+ self.mask_ctx = cairo.Context(self.mask)
+ self.mask_ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
+ self.mask_ctx.scale(1, -1)
+ self.mask_ctx.translate(-(origin_in_inch[0] * self.scale[0]), (-origin_in_inch[1]*self.scale[0]) - size_in_pixels[1])
def _render_line(self, line, color):
start = map(mul, line.start, self.scale)
end = map(mul, line.end, self.scale)
+ if not self.invert:
+ ctx = self.ctx
+ ctx.set_source_rgba(*color, alpha=self.alpha)
+ ctx.set_operator(cairo.OPERATOR_OVER if line.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
+ else:
+ ctx = self.mask_ctx
+ ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
+ ctx.set_operator(cairo.OPERATOR_CLEAR)
if isinstance(line.aperture, Circle):
width = line.aperture.diameter
- 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(width * self.scale[0])
- self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
- self.ctx.move_to(*start)
- self.ctx.line_to(*end)
- self.ctx.stroke()
+ ctx.set_line_width(width * self.scale[0])
+ ctx.set_line_cap(cairo.LINE_CAP_ROUND)
+ ctx.move_to(*start)
+ ctx.line_to(*end)
+ ctx.stroke()
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])
+ ctx.set_line_width(0)
+ ctx.move_to(*points[0])
for point in points[1:]:
- self.ctx.line_to(*point)
- self.ctx.fill()
+ ctx.line_to(*point)
+ ctx.fill()
def _render_arc(self, arc, color):
center = map(mul, arc.center, self.scale)
@@ -77,26 +91,38 @@ class GerberCairoContext(GerberContext): 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_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 not self.invert:
+ ctx = self.ctx
+ ctx.set_source_rgba(*color, alpha=self.alpha)
+ ctx.set_operator(cairo.OPERATOR_OVER if arc.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
+ else:
+ ctx = self.mask_ctx
+ ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
+ ctx.set_operator(cairo.OPERATOR_CLEAR)
+ ctx.set_line_width(width * self.scale[0])
+ ctx.set_line_cap(cairo.LINE_CAP_ROUND)
+ ctx.move_to(*start) # You actually have to do this...
if arc.direction == 'counterclockwise':
- self.ctx.arc(*center, radius=radius, angle1=angle1, angle2=angle2)
+ ctx.arc(*center, radius=radius, angle1=angle1, angle2=angle2)
else:
- self.ctx.arc_negative(*center, radius=radius, angle1=angle1, angle2=angle2)
- self.ctx.move_to(*end) # ...lame
+ ctx.arc_negative(*center, radius=radius, angle1=angle1, angle2=angle2)
+ ctx.move_to(*end) # ...lame
def _render_region(self, region, color):
- 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.set_line_cap(cairo.LINE_CAP_ROUND)
- self.ctx.move_to(*tuple(map(mul, region.primitives[0].start, self.scale)))
+ if not self.invert:
+ ctx = self.ctx
+ ctx.set_source_rgba(*color, alpha=self.alpha)
+ ctx.set_operator(cairo.OPERATOR_OVER if region.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
+ else:
+ ctx = self.mask_ctx
+ ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
+ ctx.set_operator(cairo.OPERATOR_CLEAR)
+ ctx.set_line_width(0)
+ ctx.set_line_cap(cairo.LINE_CAP_ROUND)
+ 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)))
+ 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)
@@ -105,27 +131,39 @@ class GerberCairoContext(GerberContext): angle1 = p.start_angle
angle2 = p.end_angle
if p.direction == 'counterclockwise':
- self.ctx.arc(*center, radius=radius, angle1=angle1, angle2=angle2)
+ ctx.arc(*center, radius=radius, angle1=angle1, angle2=angle2)
else:
- self.ctx.arc_negative(*center, radius=radius, angle1=angle1, angle2=angle2)
- self.ctx.fill()
+ ctx.arc_negative(*center, radius=radius, angle1=angle1, angle2=angle2)
+ 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 * self.scale[0], angle1=0, angle2=2 * math.pi)
- self.ctx.fill()
+ if not self.invert:
+ ctx = self.ctx
+ ctx.set_source_rgba(*color, alpha=self.alpha)
+ ctx.set_operator(cairo.OPERATOR_OVER if circle.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
+ else:
+ ctx = self.mask_ctx
+ ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
+ ctx.set_operator(cairo.OPERATOR_CLEAR)
+ ctx.set_line_width(0)
+ ctx.arc(*center, radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi)
+ 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()
+ if not self.invert:
+ ctx = self.ctx
+ ctx.set_source_rgba(*color, alpha=self.alpha)
+ ctx.set_operator(cairo.OPERATOR_OVER if rectangle.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
+ else:
+ ctx = self.mask_ctx
+ ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
+ ctx.set_operator(cairo.OPERATOR_CLEAR)
+ ctx.set_line_width(0)
+ ctx.rectangle(*ll, width=width, height=height)
+ ctx.fill()
def _render_obround(self, obround, color):
self._render_circle(obround.subshapes['circle1'], color)
@@ -140,17 +178,23 @@ 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.set_operator(cairo.OPERATOR_OVER if (primitive.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)
+ self.ctx.set_operator(cairo.OPERATOR_OVER if primitive.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
self.ctx.move_to(*[self.scale[0] * (coord + 0.01) 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.mask_ctx.set_operator(cairo.OPERATOR_OVER)
+ self.mask_ctx.set_source_rgba(*self.color, alpha=self.alpha)
+ self.mask_ctx.paint()
+
+ def _render_mask(self):
self.ctx.set_operator(cairo.OPERATOR_OVER)
+ ptn = cairo.SurfacePattern(self.mask)
+ ptn.set_matrix(cairo.Matrix(xx=1.0, yy=-1.0, x0=-self.origin_in_pixels[0], y0=self.size_in_pixels[1] + self.origin_in_pixels[1]))
+ self.ctx.set_source(ptn)
self.ctx.paint()
- self.ctx.set_operator(cairo.OPERATOR_CLEAR)
def _paint_background(self):
if not self.bg:
@@ -160,21 +204,17 @@ class GerberCairoContext(GerberContext): def dump(self, 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)
-
+
def dump_svg_str(self):
self.surface.finish()
self.surface_buffer.flush()
return self.surface_buffer.read()
-
\ No newline at end of file |