#! /usr/bin/env python # -*- coding: utf-8 -*- # Copyright 2015 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. """ This example demonstrates the use of pcb-tools with cairo to render a composite image from a set of gerber files. Each layer is loaded and drawn using a GerberCairoContext. The color and opacity of each layer can be set individually. Once all thedesired layers are drawn on the context, the context is written to a .png file. """ import os from gerber import load_layer from gerber.render import RenderSettings, theme from gerber.render.cairo_backend import GerberCairoContext GERBER_FOLDER = os.path.abspath(os.path.join(os.path.dirname(__file__), 'gerbers')) # Open the gerber files copper = load_layer(os.path.join(GERBER_FOLDER, 'copper.GTL')) mask = load_layer(os.path.join(GERBER_FOLDER, 'soldermask.GTS')) silk = load_layer(os.path.join(GERBER_FOLDER, 'silkscreen.GTO')) drill = load_layer(os.path.join(GERBER_FOLDER, 'ncdrill.DRD')) # Create a new drawing context ctx = GerberCairoContext() # Draw the copper layer. render_layer() uses the default color scheme for the # layer, based on the layer type. Copper layers are rendered as ctx.render_layer(copper) # Draw the soldermask layer ctx.render_layer(mask) # The default style can be overridden by passing a RenderSettings instance to # render_layer(). # First, create a settings object: our_settings = RenderSettings(color=theme.COLORS['white'], alpha=0.85) # Draw the silkscreen layer, and specify the rendering settings to use ctx.render_layer(silk, settings=our_settings) # Draw the drill layer ctx.render_layer(drill) # Write output to png file ctx.dump(os.path.join(os.path.dirname(__file__), 'cairo_example.png')) # Load the bottom layers copper = load_layer(os.path.join(GERBER_FOLDER, 'bottom_copper.GBL')) mask = load_layer(os.path.join(GERBER_FOLDER, 'bottom_mask.GBS')) # Clear the drawing ctx.clear() # Render bottom layers ctx.render_layer(copper) ctx.render_layer(mask) ctx.render_layer(drill) # Write png file ctx.dump(os.path.join(os.path.dirname(__file__), 'cairo_bottom.png'))