From 60c5906b29b6427a5190d31c7bb5511e0bf78fd4 Mon Sep 17 00:00:00 2001 From: Hamilton Kibbe Date: Sun, 20 Dec 2015 15:24:20 -0500 Subject: Clean up negative render code --- gerber/render/cairo_backend.py | 145 ++++++++++++++++++++--------------------- 1 file changed, 69 insertions(+), 76 deletions(-) (limited to 'gerber/render') diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py index 6aaffd4..c8f94ff 100644 --- a/gerber/render/cairo_backend.py +++ b/gerber/render/cairo_backend.py @@ -44,18 +44,14 @@ class GerberCairoContext(GerberContext): 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.mask_buffer = tempfile.NamedTemporaryFile() - self.mask = cairo.SVGSurface(self.mask_buffer, size_in_pixels[0], size_in_pixels[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) @@ -65,40 +61,27 @@ class GerberCairoContext(GerberContext): start = map(mul, line.start, self.scale) end = map(mul, 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" 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]) - 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() + 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: - 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() + 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 + 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] + ctx.set_line_width(0) + ctx.move_to(*points[0]) + for point in points[1:]: + ctx.line_to(*point) + ctx.fill() def _render_arc(self, arc, color): center = map(mul, arc.center, self.scale) @@ -108,26 +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) @@ -136,41 +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)) 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() + 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: - 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() + 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))) 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() + 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: - 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() + 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) @@ -185,7 +178,7 @@ 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) -- cgit