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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# 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
# limitations under the License.
from .render import GerberContext
from .apertures import Circle, Rect, Obround, Polygon
import cairo
import math
SCALE = 200.
class CairoCircle(Circle):
def line(self, ctx, x, y, color=(184/255., 115/255., 51/255.)):
ctx.set_source_rgb (*color)
ctx.set_line_width(self.diameter * SCALE)
ctx.set_line_cap(cairo.LINE_CAP_ROUND)
ctx.line_to(x * SCALE, y * SCALE)
ctx.stroke()
def arc(self, ctx, x, y, i, j, direction, color=(184/255., 115/255., 51/255.)):
ctx_x, ctx_y = ctx.get_current_point()
# Do the math
center = ((x + i) * SCALE, (y + j) * SCALE)
radius = math.sqrt(math.pow(ctx_x - center[0], 2) + math.pow(ctx_y - center[1], 2))
delta_x0 = (ctx_x - center[0])
delta_y0 = (ctx_y - center[1])
delta_x1 = (x * SCALE - center[0])
delta_y1 = (y * SCALE - center[1])
theta0 = math.atan2(delta_y0, delta_x0)
theta1 = math.atan2(delta_y1, delta_x1)
# Draw the arc
ctx.set_source_rgb (*color)
ctx.set_line_width(self.diameter * SCALE)
ctx.set_line_cap(cairo.LINE_CAP_ROUND)
if direction == 'clockwise':
ctx.arc_negative(center[0], center[1], radius, theta0, theta1)
else:
ctx.arc(center[0], center[1], radius, theta0, theta1)
ctx.stroke()
def flash(self, ctx, x, y, color=(184/255., 115/255., 51/255.)):
ctx.set_source_rgb (*color)
ctx.set_line_width(0)
ctx.arc(x * SCALE, y * SCALE, (self.diameter/2.) * SCALE, 0, 2 * math.pi)
ctx.fill()
class CairoRect(Rect):
def line(self, ctx, x, y, color=(184/255., 115/255., 51/255.)):
ctx.set_source_rgb (*color)
ctx.set_line_width(self.diameter * SCALE)
ctx.set_line_cap(cairo.LINE_CAP_SQUARE)
ctx.line_to(x * SCALE, y * SCALE)
ctx.stroke()
def flash(self, ctx, x, y, color=(184/255., 115/255., 51/255.)):
xsize, ysize = self.size
ctx.set_source_rgb (*color)
ctx.set_line_width(0)
x0 = SCALE * (x - (xsize / 2.))
y0 = SCALE * (y - (ysize / 2.))
ctx.rectangle(x0,y0,SCALE * xsize, SCALE * ysize)
ctx.fill()
class GerberCairoContext(GerberContext):
def __init__(self, surface=None, size=(1000, 1000),
color='rgb(184, 115, 51)', drill_color='gray'):
GerberContext.__init__(self)
if surface is None:
self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
size[0], size[1])
else:
self.surface = surface
self.ctx = cairo.Context(self.surface)
self.size = size
self.ctx.translate(0, self.size[1])
self.ctx.scale(1,-1)
self.apertures = {}
self.color = color
self.drill_color = drill_color
self.background = False
def set_bounds(self, bounds):
xbounds, ybounds = bounds
self.ctx.rectangle(SCALE * xbounds[0], SCALE * ybounds[0], SCALE * (xbounds[1]- xbounds[0]), SCALE * (ybounds[1] - ybounds[0]))
self.ctx.set_source_rgb(0,0,0)
self.ctx.fill()
def define_aperture(self, d, shape, modifiers):
aperture = None
if shape == 'C':
aperture = CairoCircle(diameter=float(modifiers[0][0]))
elif shape == 'R':
aperture = CairoRect(size=modifiers[0][0:2])
self.apertures[d] = aperture
def stroke(self, x, y, i, j):
super(GerberCairoContext, self).stroke(x, y, i, j)
if self.interpolation == 'linear':
self.line(x, y)
elif self.interpolation == 'arc':
self.arc(x, y, i, j)
self.move(x,y)
def line(self, x, y):
x, y = self.resolve(x, y)
ap = self.apertures.get(self.aperture, None)
if ap is None:
return
ap.line(self.ctx, x, y)
def arc(self, x, y, i, j):
super(GerberCairoContext, self).arc(x, y, i, j)
ap = self.apertures.get(self.aperture, None)
if ap is None:
return
ap.arc(self.ctx, x, y, i, j, self.direction)
def flash(self, x, y):
x, y = self.resolve(x, y)
ap = self.apertures.get(self.aperture, None)
if ap is None:
return
ap.flash(self.ctx, x, y)
self.move(x, y, resolve=False)
def move(self, x, y, resolve=True):
super(GerberCairoContext, self).move(x, y, resolve)
if x is None:
x = self.x
if y is None:
y = self.y
if self.x is not None and self.y is not None:
self.ctx.move_to(x * SCALE, y * SCALE)
def dump(self, filename):
self.surface.write_to_png(filename)
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