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# Authors: see git history
#
# Copyright (c) 2010 Authors
# Licensed under the GNU GPL version 3.0 or later. See the file LICENSE for details.
from tempfile import TemporaryDirectory
from base64 import b64encode
from typing import Optional, Tuple
import sys
from inkex import errormsg, Boolean, BoundingBox, Image, BaseElement
from inkex.command import take_snapshot
from ..marker import set_marker
from ..stitch_plan import stitch_groups_to_stitch_plan
from ..svg import render_stitch_plan
from ..svg.tags import (INKSCAPE_GROUPMODE, INKSTITCH_ATTRIBS,
SODIPODI_INSENSITIVE, SVG_GROUP_TAG, SVG_PATH_TAG, XLINK_HREF)
from .base import InkstitchExtension
from .stitch_plan_preview_undo import reset_stitch_plan
class StitchPlanPreview(InkstitchExtension):
def __init__(self, *args, **kwargs):
InkstitchExtension.__init__(self, *args, **kwargs)
self.arg_parser.add_argument("-s", "--move-to-side", type=Boolean, default=True, dest="move_to_side")
self.arg_parser.add_argument("-v", "--layer-visibility", type=str, default="unchanged", dest="layer_visibility")
self.arg_parser.add_argument("-n", "--needle-points", type=Boolean, default=False, dest="needle_points")
self.arg_parser.add_argument("-i", "--insensitive", type=Boolean, default=False, dest="insensitive")
self.arg_parser.add_argument("-c", "--visual-commands", type=Boolean, default="symbols", dest="visual_commands")
self.arg_parser.add_argument("-o", "--overwrite", type=Boolean, default=True, dest="overwrite")
self.arg_parser.add_argument("-m", "--render-mode", type=str, default="simple", dest="mode")
def effect(self):
realistic, raster_mult = self.parse_mode()
# delete old stitch plan
self.remove_old()
# create new stitch plan
if not self.get_elements():
return
svg = self.document.getroot()
visual_commands = self.options.visual_commands
self.metadata = self.get_inkstitch_metadata()
collapse_len = self.metadata['collapse_len_mm']
min_stitch_len = self.metadata['min_stitch_len_mm']
stitch_groups = self.elements_to_stitch_groups(self.elements)
stitch_plan = stitch_groups_to_stitch_plan(stitch_groups, collapse_len=collapse_len, min_stitch_len=min_stitch_len)
layer = render_stitch_plan(svg, stitch_plan, realistic, visual_commands)
layer = self.rasterize(svg, layer, raster_mult)
# update layer visibility (unchanged, hidden, lower opacity)
groups = self.document.getroot().findall(SVG_GROUP_TAG)
self.set_invisible_layers_attribute(groups, layer)
self.set_visibility(groups, layer)
self.set_sensitivity(layer)
self.translate(svg, layer)
self.set_needle_points(layer)
def parse_mode(self) -> Tuple[bool, Optional[int]]:
"""
Parse the "mode" option and return a tuple of a bool indicating if realistic rendering should be used,
and an optional int indicating the resolution multiplier to use for rasterization, or None if rasterization should not be used.
"""
realistic = False
raster_mult: Optional[int] = None
render_mode = self.options.mode
if render_mode == "simple":
pass
elif render_mode.startswith("realistic-"):
realistic = True
raster_option = render_mode.split('-')[1]
if raster_option != "vector":
try:
raster_mult = int(raster_option)
except ValueError:
errormsg(f"Invalid raster mode {raster_option}")
sys.exit(1)
else:
errormsg(f"Invalid render mode {render_mode}")
sys.exit(1)
return (realistic, raster_mult)
def remove_old(self):
svg = self.document.getroot()
if self.options.overwrite:
reset_stitch_plan(svg)
else:
reset_stitch_plan(svg, False)
layer = svg.find(".//*[@id='__inkstitch_stitch_plan__']")
if layer is not None:
layer.set('id', svg.get_unique_id('inkstitch_stitch_plan_'))
def rasterize(self, svg, layer: BaseElement, raster_mult: Optional[int]) -> BaseElement:
if raster_mult is None:
# Don't rasterize if there's no reason to.
return layer
else:
with TemporaryDirectory() as tempdir:
bbox: BoundingBox = layer.bounding_box()
rasterized_file = take_snapshot(svg, tempdir, dpi=96*raster_mult,
export_id=layer.get_id(), export_id_only=True)
with open(rasterized_file, "rb") as f:
image = Image(attrib={
XLINK_HREF: f"data:image/png;base64,{b64encode(f.read()).decode()}",
"x": str(bbox.left),
"y": str(bbox.top),
"height": str(bbox.height),
"width": str(bbox.width),
})
layer.replace_with(image)
return image
def set_invisible_layers_attribute(self, groups, layer):
invisible_layers = []
for g in groups:
if g.get(INKSCAPE_GROUPMODE) == "layer" and 'display' in g.style and g.style['display'] == 'none':
invisible_layers.append(g.get_id())
layer.set(INKSTITCH_ATTRIBS['invisible_layers'], ",".join(invisible_layers))
layer.set(INKSTITCH_ATTRIBS['layer_visibility'], self.options.layer_visibility)
def set_visibility(self, groups, layer):
if self.options.layer_visibility == "hidden":
self.hide_all_layers()
layer.style['display'] = "inline"
elif self.options.layer_visibility == "lower_opacity":
for g in groups:
style = g.specified_style()
# check groupmode and exclude stitch_plan layer
# exclude objects which are not displayed at all or already have opacity < 0.4
if (g.get(INKSCAPE_GROUPMODE) == "layer" and not g == layer and
float(style.get('opacity', 1)) > 0.4 and not style.get('display', 'inline') == 'none'):
g.style['opacity'] = 0.4
def set_sensitivity(self, layer):
if self.options.insensitive is True:
layer.set(SODIPODI_INSENSITIVE, True)
else:
layer.pop(SODIPODI_INSENSITIVE)
def translate(self, svg, layer):
if self.options.move_to_side:
# translate stitch plan to the right side of the canvas
translate = svg.get('viewBox', '0 0 800 0').split(' ')[2]
layer.transform = layer.transform.add_translate(translate)
def set_needle_points(self, layer):
if self.options.needle_points:
for element in layer.iterdescendants(SVG_PATH_TAG):
set_marker(element, 'start', 'needle-point')
set_marker(element, 'mid', 'needle-point')
set_marker(element, 'end', 'needle-point')
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