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-rw-r--r--gerber/render/cairo_backend.py121
1 files changed, 84 insertions, 37 deletions
diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py
index 345f331..6aaffd4 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)
@@ -32,42 +33,72 @@ 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])
self.ctx = cairo.Context(self.surface)
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_buffer = tempfile.NamedTemporaryFile()
+ self.mask = cairo.SVGSurface(self.mask_buffer, 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 isinstance(line.aperture, Circle):
- width = line.aperture.diameter
+ 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" 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()
- 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:]:
- self.ctx.line_to(*point)
- self.ctx.fill()
+ if isinstance(line.aperture, Circle):
+ width = line.aperture.diameter
+ 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()
+ elif isinstance(line.aperture, Rectangle):
+ points = [tuple(map(mul, x, self.scale)) for x in line.vertices]
+ self.ctx.set_line_width(0)
+ self.ctx.move_to(*points[0])
+ for point in points[1:]:
+ self.ctx.line_to(*point)
+ self.ctx.fill()
+ else:
+ self.mask_ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
+ self.mask_ctx.set_operator(cairo.OPERATOR_CLEAR)
+ if isinstance(line.aperture, Circle):
+ width = line.aperture.diameter
+ self.mask_ctx.set_line_width(0)
+ self.mask_ctx.set_line_width(width * self.scale[0])
+ self.mask_ctx.set_line_cap(cairo.LINE_CAP_ROUND)
+ self.mask_ctx.move_to(*start)
+ self.mask_ctx.line_to(*end)
+ self.mask_ctx.stroke()
+ elif isinstance(line.aperture, Rectangle):
+ points = [tuple(map(mul, x, self.scale)) for x in line.vertices]
+ self.mask_ctx.set_line_width(0)
+ self.mask_ctx.move_to(*points[0])
+ for point in points[1:]:
+ self.mask_ctx.line_to(*point)
+ self.mask_ctx.fill()
def _render_arc(self, arc, color):
center = map(mul, arc.center, self.scale)
@@ -78,7 +109,7 @@ class GerberCairoContext(GerberContext):
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_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...
@@ -112,20 +143,34 @@ class GerberCairoContext(GerberContext):
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:
+ 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()
+ else:
+ self.mask_ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
+ self.mask_ctx.set_operator(cairo.OPERATOR_CLEAR)
+ self.mask_ctx.set_line_width(0)
+ self.mask_ctx.arc(*center, radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi)
+ self.mask_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:
+ 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()
+ else:
+ self.mask_ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
+ self.mask_ctx.set_operator(cairo.OPERATOR_CLEAR)
+ self.mask_ctx.set_line_width(0)
+ self.mask_ctx.rectangle(*ll, width=width, height=height)
+ self.mask_ctx.fill()
def _render_obround(self, obround, color):
self._render_circle(obround.subshapes['circle1'], color)
@@ -140,17 +185,23 @@ 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" 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.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 +211,17 @@ 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
generated by cgit (git 2.34.1) at 2024-07-06 05:13:55 +0000