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Diffstat (limited to 'share/extensions/ink2canvas_lib/canvas.py')
| -rw-r--r-- | share/extensions/ink2canvas_lib/canvas.py | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/share/extensions/ink2canvas_lib/canvas.py b/share/extensions/ink2canvas_lib/canvas.py new file mode 100644 index 0000000..c219132 --- /dev/null +++ b/share/extensions/ink2canvas_lib/canvas.py @@ -0,0 +1,191 @@ +# coding=utf-8 +# +# Copyright (C) 2011 Karlisson Bezerra <contact@hacktoon.com> +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +""" +Convas module for ink2canvas extension +""" + +from inkex import Color + +class Canvas(object): + """Canvas API helper class""" + + def __init__(self, parent, width, height, context="ctx"): + self.obj = context + self.code = [] # stores the code + self.style = {} + self.styleCache = {} # stores the previous style applied + self.parent = parent + self.width = width + self.height = height + + def write(self, text): + self.code.append("\t" + text.replace("ctx", self.obj) + "\n") + + def output(self): + from textwrap import dedent + html = """ + <!DOCTYPE html> + <html> + <head> + <title>Inkscape Output</title> + </head> + <body> + <canvas id='canvas' width='%d' height='%d'></canvas> + <script> + var %s = document.getElementById("canvas").getContext("2d"); + %s + </script> + </body> + </html> + """ + return dedent(html) % (self.width, self.height, self.obj, "".join(self.code)) + + def equalStyle(self, style, key): + """Checks if the last style used is the same or there's no style yet""" + if key in self.styleCache: + return True + if key not in style: + return True + return style[key] == self.styleCache[key] + + def beginPath(self): + self.write("ctx.beginPath();") + + def createLinearGradient(self, href, x1, y1, x2, y2): + data = (href, x1, y1, x2, y2) + self.write("var %s = \ + ctx.createLinearGradient(%f,%f,%f,%f);" % data) + + def createRadialGradient(self, href, cx1, cy1, rx, cx2, cy2, ry): + data = (href, cx1, cy1, rx, cx2, cy2, ry) + self.write("var %s = ctx.createRadialGradient\ + (%f,%f,%f,%f,%f,%f);" % data) + + def addColorStop(self, href, pos, color): + self.write("%s.addColorStop(%f, %s);" % (href, pos, color)) + + def getColor(self, rgb, alpha): + return "'{}'".format(str(Color(rgb).to_rgba(alpha))) + + def setGradient(self, href): + """ + for stop in gstops: + style = simplestyle.parseStyle(stop.get("style")) + stop_color = style["stop-color"] + opacity = style["stop-opacity"] + color = self.getColor(stop_color, opacity) + pos = float(stop.get("offset")) + self.addColorStop(href, pos, color) + """ + return None # href + + def setOpacity(self, value): + self.write("ctx.globalAlpha = %.1f;" % float(value)) + + def setFill(self, value): + try: + alpha = self.style["fill-opacity"] + except: + alpha = 1 + if not value.startswith("url("): + fill = self.getColor(value, alpha) + self.write("ctx.fillStyle = %s;" % fill) + + def setStroke(self, value): + try: + alpha = self.style["stroke-opacity"] + except: + alpha = 1 + self.write("ctx.strokeStyle = %s;" % self.getColor(value, alpha)) + + def setStrokeWidth(self, value): + self.write("ctx.lineWidth = %f;" % self.parent.svg.unittouu(value)) + + def setStrokeLinecap(self, value): + self.write("ctx.lineCap = '%s';" % value) + + def setStrokeLinejoin(self, value): + self.write("ctx.lineJoin = '%s';" % value) + + def setStrokeMiterlimit(self, value): + self.write("ctx.miterLimit = %s;" % value) + + def setFont(self, value): + self.write("ctx.font = \"%s\";" % value) + + def moveTo(self, x, y): + self.write("ctx.moveTo(%f, %f);" % (x, y)) + + def lineTo(self, x, y): + self.write("ctx.lineTo(%f, %f);" % (x, y)) + + def quadraticCurveTo(self, cpx, cpy, x, y): + data = (cpx, cpy, x, y) + self.write("ctx.quadraticCurveTo(%f, %f, %f, %f);" % data) + + def bezierCurveTo(self, x1, y1, x2, y2, x, y): + data = (x1, y1, x2, y2, x, y) + self.write("ctx.bezierCurveTo(%f, %f, %f, %f, %f, %f);" % data) + + def rect(self, x, y, w, h, rx=0, ry=0): + if rx or ry: + # rounded rectangle, starts top-left anticlockwise + self.moveTo(x, y + ry) + self.lineTo(x, y + h - ry) + self.quadraticCurveTo(x, y + h, x + rx, y + h) + self.lineTo(x + w - rx, y + h) + self.quadraticCurveTo(x + w, y + h, x + w, y + h - ry) + self.lineTo(x + w, y + ry) + self.quadraticCurveTo(x + w, y, x + w - rx, y) + self.lineTo(x + rx, y) + self.quadraticCurveTo(x, y, x, y + ry) + else: + self.write("ctx.rect(%f, %f, %f, %f);" % (x, y, w, h)) + + def arc(self, x, y, r, a1, a2, flag): + data = (x, y, r, a1, a2, flag) + self.write("ctx.arc(%f, %f, %f, %f, %.8f, %d);" % data) + + def fillText(self, text, x, y): + self.write("ctx.fillText(\"%s\", %f, %f);" % (text, x, y)) + + def translate(self, cx, cy): + self.write("ctx.translate(%f, %f);" % (cx, cy)) + + def rotate(self, angle): + self.write("ctx.rotate(%f);" % angle) + + def scale(self, rx, ry): + self.write("ctx.scale(%f, %f);" % (rx, ry)) + + def transform(self, m11, m12, m21, m22, dx, dy): + data = (m11, m12, m21, m22, dx, dy) + self.write("ctx.transform(%f, %f, %f, %f, %f, %f);" % data) + + def save(self): + self.write("ctx.save();") + + def restore(self): + self.write("ctx.restore();") + + def closePath(self): + if "fill" in self.style and self.style["fill"] != "none": + self.write("ctx.fill();") + if "stroke" in self.style and self.style["stroke"] != "none": + self.write("ctx.stroke();") |