# -*- coding: utf-8 -*- # Copyright 2011 Takeshi KOMIYA # # 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. import math import re from reportlab.lib.utils import ImageReader from reportlab.pdfbase import pdfmetrics from reportlab.pdfbase.ttfonts import TTFont from reportlab.pdfgen import canvas from blockdiag.imagedraw import base from blockdiag.imagedraw.utils import memoize from blockdiag.utils import Box, Size, images from blockdiag.utils.fontmap import parse_fontpath class PDFImageDraw(base.ImageDraw): baseline_text_rendering = True def __init__(self, filename, **kwargs): self.filename = filename self.canvas = None self.fonts = {} self.set_canvas_size(Size(1, 1)) # This line make textsize() workable def set_canvas_size(self, size): self.canvas = canvas.Canvas(self.filename, pagesize=size) self.size = size def set_font(self, font): if font.path is None: msg = "Could not detect fonts, use --font opiton\n" raise RuntimeError(msg) if font.path not in self.fonts: path, index = parse_fontpath(font.path) if index: ttfont = TTFont(font.path, path, subfontIndex=index) else: ttfont = TTFont(font.path, path) pdfmetrics.registerFont(ttfont) self.fonts[font.path] = ttfont self.canvas.setFont(font.path, font.size) def set_render_params(self, **kwargs): self.set_stroke_color(kwargs.get('outline')) self.set_fill_color(kwargs.get('fill', 'none')) self.set_style(kwargs.get('style'), kwargs.get('thick')) params = {} if kwargs.get('fill', 'none') == 'none': params['fill'] = 0 else: params['fill'] = 1 if kwargs.get('outline') is None: params['stroke'] = 0 else: params['stroke'] = 1 return params def set_style(self, style, thick): if thick is None: thick = 1 if style == 'dotted': self.canvas.setDash([2 * thick, 2 * thick]) elif style == 'dashed': self.canvas.setDash([4 * thick, 4 * thick]) elif style == 'none': self.canvas.setDash([0, 65535 * thick]) elif re.search(r'^\d+(,\d+)*$', style or ""): self.canvas.setDash([int(n) * thick for n in style.split(',')]) else: self.canvas.setDash() def set_stroke_color(self, color="black"): if isinstance(color, str): self.canvas.setStrokeColor(color) elif color: rgb = (color[0] / 256.0, color[1] / 256.0, color[2] / 256.0) self.canvas.setStrokeColorRGB(*rgb) else: self.set_stroke_color() def set_fill_color(self, color="white"): if isinstance(color, str): if color != 'none': self.canvas.setFillColor(color) elif color: rgb = (color[0] / 256.0, color[1] / 256.0, color[2] / 256.0) self.canvas.setFillColorRGB(*rgb) else: self.set_fill_color() def path(self, pd, **kwargs): params = self.set_render_params(**kwargs) self.canvas.drawPath(pd, **params) def rectangle(self, box, **kwargs): x = box[0] y = self.size[1] - box[3] width = box[2] - box[0] height = box[3] - box[1] if 'thick' in kwargs and kwargs['thick'] is not None: self.canvas.setLineWidth(kwargs['thick']) params = self.set_render_params(**kwargs) self.canvas.rect(x, y, width, height, **params) if 'thick' in kwargs: self.canvas.setLineWidth(1) @memoize def textlinesize(self, string, font): self.set_font(font) width = self.canvas.stringWidth(string, font.path, font.size) return Size(int(math.ceil(width)), font.size) def text(self, xy, string, font, **kwargs): self.set_font(font) self.set_fill_color(kwargs.get('fill')) self.canvas.drawString(xy[0], self.size[1] - xy[1], string) def textarea(self, box, string, font, **kwargs): self.canvas.saveState() if 'rotate' in kwargs and kwargs['rotate'] != 0: angle = 360 - int(kwargs['rotate']) % 360 self.canvas.rotate(angle) if angle == 90: box = Box(-box.y2, box.x1, -box.y1, box.x1 + box.width) box = box.shift(x=self.size.height, y=self.size.height) elif angle == 180: box = Box(-box.x2, -box.y2, -box.x1, -box.y2 + box.height) box = box.shift(y=self.size.height * 2) elif angle == 270: box = Box(box.y1, -box.x2, box.y2, -box.x1) box = box.shift(x=-self.size.height, y=self.size.height) self.set_font(font) lines = self.textfolder(box, string, font, **kwargs) if kwargs.get('outline'): outline = kwargs.get('outline') self.rectangle(lines.outlinebox, fill='white', outline=outline) rendered = False for string, xy in lines.lines: self.text(xy, string, font, **kwargs) rendered = True self.canvas.restoreState() if not rendered and font.size > 0: font.size = int(font.size * 0.8) self.textarea(box, string, font, **kwargs) def line(self, xy, **kwargs): self.set_stroke_color(kwargs.get('fill', 'none')) self.set_style(kwargs.get('style'), kwargs.get('thick')) if 'thick' in kwargs and kwargs['thick'] is not None: self.canvas.setLineWidth(kwargs['thick']) p1 = xy[0] y = self.size[1] for p2 in xy[1:]: self.canvas.line(p1.x, y - p1.y, p2.x, y - p2.y) p1 = p2 if 'thick' in kwargs: self.canvas.setLineWidth(1) def arc(self, xy, start, end, **kwargs): start, end = 360 - end, 360 - start r = (360 + end - start) % 360 self.set_render_params(**kwargs) y = self.size[1] self.canvas.arc(xy[0], y - xy[3], xy[2], y - xy[1], start, r) def ellipse(self, xy, **kwargs): params = self.set_render_params(**kwargs) y = self.size[1] self.canvas.ellipse(xy[0], y - xy[3], xy[2], y - xy[1], **params) def polygon(self, xy, **kwargs): pd = self.canvas.beginPath() y = self.size[1] pd.moveTo(xy[0][0], y - xy[0][1]) for p in xy[1:]: pd.lineTo(p[0], y - p[1]) params = self.set_render_params(**kwargs) self.canvas.drawPath(pd, **params) def image(self, box, url): try: image = images.open(url, mode='pillow') if image.mode not in ('RGBA', 'L', 'RGB', 'CYMYK'): # convert to format that reportlab can recognize image = image.convert('RGBA') y = self.size[1] - box[3] data = ImageReader(image) self.canvas.drawImage(data, box.x1, y, box.width, box.height, mask='auto', preserveAspectRatio=True) except IOError: pass def save(self, filename, size, _format): # Ignore size and format parameter; compatibility for ImageDrawEx. self.canvas.showPage() self.canvas.save() def setup(self): from blockdiag.imagedraw import install_imagedrawer install_imagedrawer('pdf', PDFImageDraw)