From 8cd842a41a55ab3d8f558a2e3e198beba7da58a1 Mon Sep 17 00:00:00 2001 From: Hamilton Kibbe Date: Thu, 21 Jan 2016 03:57:44 -0500 Subject: Manually mere rendering changes --- gerber/render/cairo_backend.py | 395 +++++++++++++++++++++-------------------- 1 file changed, 207 insertions(+), 188 deletions(-) (limited to 'gerber/render/cairo_backend.py') diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py index 78ccf34..349640a 100644 --- a/gerber/render/cairo_backend.py +++ b/gerber/render/cairo_backend.py @@ -12,7 +12,7 @@ # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -# See the License for the specific language governing permissions and +# See the License for the specific language governing permissions and # limitations under the License. try: @@ -21,7 +21,8 @@ except ImportError: import cairocffi as cairo import math -from operator import mul, div +from operator import mul, di + import tempfile from ..primitives import * @@ -36,11 +37,14 @@ except(ImportError): class GerberCairoContext(GerberContext): + def __init__(self, scale=300): - GerberContext.__init__(self) + super(GerberCairoContext, self).__init__() self.scale = (scale, scale) self.surface = None self.ctx = None + self.active_layer = None + self.output_ctx = None self.bg = False self.mask = None self.mask_ctx = None @@ -50,37 +54,40 @@ class GerberCairoContext(GerberContext): @property def origin_in_pixels(self): - return tuple(map(mul, self.origin_in_inch, self.scale)) if self.origin_in_inch is not None else (0.0, 0.0) + return (self.scale_point(self.origin_in_inch) + if self.origin_in_inch is not None else (0.0, 0.0)) @property def size_in_pixels(self): - return tuple(map(mul, self.size_in_inch, self.scale)) if self.size_in_inch is not None else (0.0, 0.0) + return (self.scale_point(self.size_in_inch) + if self.size_in_inch is not None else (0.0, 0.0)) def set_bounds(self, bounds, new_surface=False): 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 = tuple(map(mul, size_in_inch, self.scale)) + size_in_inch = (abs(bounds[0][1] - bounds[0][0]), + abs(bounds[1][1] - bounds[1][0])) + size_in_pixels = self.scale_point(size_in_inch) self.origin_in_inch = origin_in_inch if self.origin_in_inch is None else self.origin_in_inch 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.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 = 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]) - self._xform_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.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]) + self._xform_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]) def render_layers(self, layers, filename, theme=THEMES['default']): """ Render a set of layers """ self.set_bounds(layers[0].bounds, True) self._paint_background(True) + for layer in layers: self._render_layer(layer, theme) self.dump(filename) @@ -117,46 +124,46 @@ class GerberCairoContext(GerberContext): self.color = settings.color self.alpha = settings.alpha self.invert = settings.invert + + # Get a new clean layer to render on + self._new_render_layer() if settings.mirror: raise Warning('mirrored layers aren\'t supported yet...') - if self.invert: - self._clear_mask() for prim in layer.primitives: self.render(prim) - if self.invert: - self._render_mask() + # Add layer to image + self._flatten() def _render_line(self, line, color): - start = map(mul, line.start, self.scale) - end = map(mul, line.end, self.scale) + 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: - ctx = self.ctx - ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) - ctx.set_operator(cairo.OPERATOR_OVER if line.level_polarity == "dark" else cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) + self.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) + self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0) + self.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() + 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] - ctx.set_line_width(0) - ctx.move_to(*points[0]) + points = [self.scale_point(x) for x in line.vertices] + self.ctx.set_line_width(0) + self.ctx.move_to(*points[0]) for point in points[1:]: - ctx.line_to(*point) - ctx.fill() + self.ctx.line_to(*point) + self.ctx.fill() def _render_arc(self, arc, color): - center = map(mul, arc.center, self.scale) - start = map(mul, arc.start, self.scale) - end = map(mul, arc.end, self.scale) + center = self.scale_point(arc.center) + start = self.scale_point(arc.start) + end = self.scale_point(arc.end) radius = self.scale[0] * arc.radius angle1 = arc.start_angle angle2 = arc.end_angle @@ -169,141 +176,137 @@ class GerberCairoContext(GerberContext): width = max(arc.aperture.width, arc.aperture.height, 0.001) if not self.invert: - ctx = self.ctx - ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) - ctx.set_operator(cairo.OPERATOR_OVER if arc.level_polarity == "dark" else cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) + self.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) + self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0) + self.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... + 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': - ctx.arc(center[0], center[1], radius, angle1, angle2) + self.ctx.arc(center[0], center[1], radius, angle1, angle2) else: - ctx.arc_negative(center[0], center[1], radius, angle1, angle2) - ctx.move_to(*end) # ...lame - ctx.stroke() + self.ctx.arc_negative(center[0], center[1], radius, angle1, angle2) + self.ctx.move_to(*end) # ...lame def _render_region(self, region, color): if not self.invert: - ctx = self.ctx - ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) - ctx.set_operator(cairo.OPERATOR_OVER if region.level_polarity == "dark" else cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) + self.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): - ctx.line_to(*tuple(map(mul, p.end, self.scale))) + self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0) + self.ctx.set_operator(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)) + for prim in region.primitives: + if isinstance(prim, Line): + self.ctx.line_to(*self.scale_point(prim.end)) 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': - ctx.arc(center[0], center[1], radius, angle1, angle2) + center = self.scale_point(prim.center) + radius = self.scale[0] * prim.radius + angle1 = prim.start_angle + angle2 = prim.end_angle + if prim.direction == 'counterclockwise': + self.ctx.arc(*center, radius=radius, + angle1=angle1, angle2=angle2) else: - ctx.arc_negative(center[0], center[1], radius, angle1, angle2) - ctx.fill() - + 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)) + center = self.scale_point(circle.position) if not self.invert: - ctx = self.ctx - ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) - ctx.set_operator(cairo.OPERATOR_OVER if circle.level_polarity == "dark" else cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) + self.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) + self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0) + self.ctx.set_operator(cairo.OPERATOR_CLEAR) if circle.hole_diameter > 0: - ctx.push_group() + self.ctx.push_group() - ctx.set_line_width(0) - ctx.arc(center[0], center[1], radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi) - ctx.fill() + self.ctx.set_line_width(0) + self.ctx.arc(center[0], center[1], radius=circle.radius * self.scale[0], angle1=0, angle2=2 * math.pi) + self.ctx.fill() if circle.hole_diameter > 0: # Render the center clear - ctx.set_source_rgba(color[0], color[1], color[2], self.alpha) - ctx.set_operator(cairo.OPERATOR_CLEAR) - ctx.arc(center[0], center[1], radius=circle.hole_radius * self.scale[0], angle1=0, angle2=2 * math.pi) - ctx.fill() + self.ctx.set_source_rgba(color[0], color[1], color[2], self.alpha) + self.ctx.set_operator(cairo.OPERATOR_CLEAR) + self.ctx.arc(center[0], center[1], radius=circle.hole_radius * self.scale[0], angle1=0, angle2=2 * math.pi) + self.ctx.fill() - ctx.pop_group_to_source() - ctx.paint_with_alpha(1) + self.ctx.pop_group_to_source() + self.ctx.paint_with_alpha(1) 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))) + 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: - ctx = self.ctx - ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) - ctx.set_operator(cairo.OPERATOR_OVER if rectangle.level_polarity == "dark" else cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) + self.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) + self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0) + self.ctx.set_operator(cairo.OPERATOR_CLEAR) if rectangle.rotation != 0: - ctx.save() + self.ctx.save() center = map(mul, rectangle.position, self.scale) matrix = cairo.Matrix() matrix.translate(center[0], center[1]) # For drawing, we already handles the translation - ll[0] = ll[0] - center[0] - ll[1] = ll[1] - center[1] + lower_left[0] = lower_left[0] - center[0] + lower_left[1] = lower_left[1] - center[1] matrix.rotate(rectangle.rotation) - ctx.transform(matrix) + self.ctx.transform(matrix) if rectangle.hole_diameter > 0: - ctx.push_group() + self.ctx.push_group() - ctx.set_line_width(0) - ctx.rectangle(ll[0], ll[1], width, height) - ctx.fill() + self.ctx.set_line_width(0) + self.ctx.rectangle(lower_left[0], lower_left[1], width, height) + self.ctx.fill() if rectangle.hole_diameter > 0: # Render the center clear - ctx.set_source_rgba(color[0], color[1], color[2], self.alpha) - ctx.set_operator(cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], self.alpha) + self.ctx.set_operator(cairo.OPERATOR_CLEAR) center = map(mul, rectangle.position, self.scale) - ctx.arc(center[0], center[1], radius=rectangle.hole_radius * self.scale[0], angle1=0, angle2=2 * math.pi) - ctx.fill() + self.ctx.arc(center[0], center[1], radius=rectangle.hole_radius * self.scale[0], angle1=0, angle2=2 * math.pi) + self.ctx.fill() - ctx.pop_group_to_source() - ctx.paint_with_alpha(1) + self.ctx.pop_group_to_source() + self.ctx.paint_with_alpha(1) if rectangle.rotation != 0: - ctx.restore() + self.ctx.restore() def _render_obround(self, obround, color): if not self.invert: - ctx = self.ctx - ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) - ctx.set_operator(cairo.OPERATOR_OVER if obround.level_polarity == "dark" else cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) + self.ctx.set_operator(cairo.OPERATOR_OVER if obround.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) + self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0) + self.ctx.set_operator(cairo.OPERATOR_CLEAR) if obround.hole_diameter > 0: - ctx.push_group() + self.ctx.push_group() self._render_circle(obround.subshapes['circle1'], color) self._render_circle(obround.subshapes['circle2'], color) @@ -311,55 +314,54 @@ class GerberCairoContext(GerberContext): if obround.hole_diameter > 0: # Render the center clear - ctx.set_source_rgba(color[0], color[1], color[2], self.alpha) - ctx.set_operator(cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], self.alpha) + self.ctx.set_operator(cairo.OPERATOR_CLEAR) center = map(mul, obround.position, self.scale) - ctx.arc(center[0], center[1], radius=obround.hole_radius * self.scale[0], angle1=0, angle2=2 * math.pi) - ctx.fill() + self.ctx.arc(center[0], center[1], radius=obround.hole_radius * self.scale[0], angle1=0, angle2=2 * math.pi) + self.ctx.fill() - ctx.pop_group_to_source() - ctx.paint_with_alpha(1) + self.ctx.pop_group_to_source() + self.ctx.paint_with_alpha(1) def _render_polygon(self, polygon, color): # TODO Ths does not handle rotation of a polygon if not self.invert: - ctx = self.ctx - ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) - ctx.set_operator(cairo.OPERATOR_OVER if polygon.level_polarity == "dark" else cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) + self.ctx.set_operator(cairo.OPERATOR_OVER if polygon.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) + self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0) + self.ctx.set_operator(cairo.OPERATOR_CLEAR) if polygon.hole_radius > 0: - ctx.push_group() + self.ctx.push_group() vertices = polygon.vertices - ctx.set_line_width(0) - ctx.set_line_cap(cairo.LINE_CAP_ROUND) + self.ctx.set_line_width(0) + self.ctx.set_line_cap(cairo.LINE_CAP_ROUND) # Start from before the end so it is easy to iterate and make sure it is closed - ctx.move_to(*map(mul, vertices[-1], self.scale)) + self.ctx.move_to(*map(mul, vertices[-1], self.scale)) for v in vertices: - ctx.line_to(*map(mul, v, self.scale)) + self.ctx.line_to(*map(mul, v, self.scale)) - ctx.fill() + self.ctx.fill() if polygon.hole_radius > 0: # Render the center clear center = tuple(map(mul, polygon.position, self.scale)) - ctx.set_source_rgba(color[0], color[1], color[2], self.alpha) - ctx.set_operator(cairo.OPERATOR_CLEAR) - ctx.set_line_width(0) - ctx.arc(center[0], center[1], polygon.hole_radius * self.scale[0], 0, 2 * math.pi) - ctx.fill() + self.ctx.set_source_rgba(color[0], color[1], color[2], self.alpha) + self.ctx.set_operator(cairo.OPERATOR_CLEAR) + self.ctx.set_line_width(0) + self.ctx.arc(center[0], center[1], polygon.hole_radius * self.scale[0], 0, 2 * math.pi) + self.ctx.fill() - ctx.pop_group_to_source() - ctx.paint_with_alpha(1) + self.ctx.pop_group_to_source() + self.ctx.paint_with_alpha(1) - def _render_drill(self, circle, color): + def _render_drill(self, circle, color=None): + color = color if color is not None else self.drill_color self._render_circle(circle, color) def _render_slot(self, slot, color): @@ -369,19 +371,17 @@ class GerberCairoContext(GerberContext): width = slot.diameter if not self.invert: - ctx = self.ctx - ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) - ctx.set_operator(cairo.OPERATOR_OVER if slot.level_polarity == "dark" else cairo.OPERATOR_CLEAR) + self.ctx.set_source_rgba(color[0], color[1], color[2], alpha=self.alpha) + self.ctx.set_operator(cairo.OPERATOR_OVER if slot.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) - ctx.line_to(*end) - ctx.stroke() + self.ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0) + self.ctx.set_operator(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() def _render_amgroup(self, amgroup, color): self.ctx.push_group() @@ -391,33 +391,52 @@ class GerberCairoContext(GerberContext): self.ctx.paint_with_alpha(1) def _render_test_record(self, primitive, color): - position = tuple(map(add, primitive.position, self.origin_in_inch)) + position = [pos + origin for pos, origin in zip(primitive.position, self.origin_in_inch)] self.ctx.set_operator(cairo.OPERATOR_OVER) - self.ctx.select_font_face('monospace', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD) + 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_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.scale(1, -1) self.ctx.show_text(primitive.net_name) - self.ctx.scale(1, -1) - - def _clear_mask(self): - self.mask_ctx.set_operator(cairo.OPERATOR_OVER) - self.mask_ctx.set_source_rgba(self.background_color[0], self.background_color[1], self.background_color[2], alpha=self.alpha) - self.mask_ctx.paint() - - def _render_mask(self): - self.ctx.set_operator(cairo.OPERATOR_OVER) - ptn = cairo.SurfacePattern(self.mask) + self.ctx.scale(1, -1) + + def _new_render_layer(self, color=None): + size_in_pixels = self.scale_point(self.size_in_inch) + 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]) + if self.invert: + ctx.set_operator(cairo.OPERATOR_OVER) + ctx.set_source_rgba(*self.color, alpha=self.alpha) + ctx.paint() + self.ctx = ctx + self.active_layer = layer + + def _flatten(self): + self.output_ctx.set_operator(cairo.OPERATOR_OVER) + ptn = cairo.SurfacePattern(self.active_layer) ptn.set_matrix(self._xform_matrix) - self.ctx.set_source(ptn) - self.ctx.paint() + self.output_ctx.set_source(ptn) + self.output_ctx.paint() + self.ctx = None + self.active_layer = None def _paint_background(self, force=False): - if (not self.bg) or force: - self.bg = True - self.ctx.set_source_rgba(self.background_color[0], self.background_color[1], self.background_color[2], alpha=1.0) - self.ctx.paint() - + 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[0], self.background_color[1], self.background_color[2], alpha=1.0) + self.output_ctx.paint() + + def scale_point(self, point): + return tuple([coord * scale for coord, scale in zip(point, self.scale)]) \ No newline at end of file -- cgit