How to capture vector image in PDF file by using PDFBOX - vector

I want to capture vector image like this.
Vector image There are so many operators "m" and "l" to draw this vector image. GeneralPath object will load these "m" "l" oprs in pdfbox. I wonder if there is some method that can tell me that this is a vector.
This file content stream:
91.92 141.48 m
91.92 272.76 l
S
88.68 141.48 m
91.92 141.48 l
88.68 160.2 m
91.92 160.2 l
88.68 178.92 m
91.92 178.92 l
88.68 197.76 m
91.92 197.76 l
88.68 216.48 m
91.92 216.48 l
88.68 235.32 m
91.92 235.32 l
88.68 254.04 m
91.92 254.04 l
88.68 272.76 m
91.92 272.76 l
S
91.92 197.76 m
388.8 197.76 l
S

Related

QML Image does not stretch/fit SVG

I have this SVG image:
and I want to stretch (or fit) inside a QML Image.
I wrote this code:
import QtQuick 2.0
Rectangle {
width: 250
height: 250
color: "yellow" // just to see the actual area
Image {
id: image
x: 0
y: 0
width: 250
height: 250
source: "file:///home/mark/headphones.svg"
sourceSize: Qt.size(width, height)
fillMode: Image.Stretch
}
}
Here the result:
Using fillMode: Image.Stretch or fillMode: Image.PreserveAspectFit I expect the image would actually fit the constraint of the desired size.
What am I missing here?
I'm run Qt 6.2.0 on Ubuntu Desktop 20.04.
UPDATE
Here the source code of the SVG file:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
id="svg11"
height="100%"
width="100%"
version="1.0">
<metadata
id="metadata15">
<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
</cc:Work>
</rdf:RDF>
</metadata>
<defs
id="defs3">
<pattern
y="0"
x="0"
height="6"
width="6"
patternUnits="userSpaceOnUse"
id="WMFhbasepattern" />
</defs>
<path
id="path5"
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style="fill:#000000;fill-rule:evenodd;fill-opacity:1;stroke:none;" />
<path
id="path7"
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id="path9"
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style="fill:#000000;fill-rule:nonzero;fill-opacity:1;stroke:none;" />
</svg>

your SVG File has a problem :
I update something in your code too :
Rectangle {
width: 250
height: 250
color: "yellow" // just to see the actual area
Image {
id:img
anchors.fill: parent
source: "img.svg"
sourceSize: Qt.size(width, height)
fillMode: Image.Stretch
}
}
SVG :
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
id="svg11"
height="166"
width="200"
version="1.0"
sodipodi:docname="img.svg"
inkscape:version="1.1 (ce6663b3b7, 2021-05-25)"
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
xmlns="http://www.w3.org/2000/svg"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:dc="http://purl.org/dc/elements/1.1/">
<sodipodi:namedview
id="namedview9"
pagecolor="#505050"
bordercolor="#eeeeee"
borderopacity="1"
inkscape:pageshadow="0"
inkscape:pageopacity="0"
inkscape:pagecheckerboard="0"
showgrid="false"
inkscape:zoom="1.2280088"
inkscape:cx="144.13578"
inkscape:cy="67.996257"
inkscape:window-width="1366"
inkscape:window-height="670"
inkscape:window-x="0"
inkscape:window-y="27"
inkscape:window-maximized="1"
inkscape:current-layer="svg11" />
<metadata
id="metadata15">
<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
</cc:Work>
</rdf:RDF>
</metadata>
<defs
id="defs3">
<pattern
y="0"
x="0"
height="6"
width="6"
patternUnits="userSpaceOnUse"
id="WMFhbasepattern" />
</defs>
<path
id="path5"
d="m 34.080029,104.54594 0.02287,-0.77751 0.0343,-0.76608 0.0686,-0.75465 0.09147,-0.76607 0.125774,-0.75465 0.148642,-0.754644 0.182944,-0.754645 0.194379,-0.731777 0.22868,-0.731777 0.262982,-0.731777 0.274417,-0.708909 0.308718,-0.708909 0.331587,-0.686041 0.354454,-0.686041 0.377323,-0.663173 0.40019,-0.663173 0.423059,-0.628871 0.457361,-0.628871 0.468794,-0.606003 0.491663,-0.594569 0.514531,-0.5717 0.525964,-0.560267 0.560267,-0.537399 0.571701,-0.514531 0.594569,-0.491662 0.606003,-0.480229 0.628871,-0.445927 0.640305,-0.434492 0.651738,-0.400191 0.674607,-0.388756 0.674607,-0.354455 0.697475,-0.331586 0.708909,-0.308719 0.720343,-0.28585 0.731777,-0.251549 0.731777,-0.240114 0.743212,-0.194378 0.754645,-0.182944 0.754645,-0.148643 0.754645,-0.125774 0.766079,-0.102906 0.777513,-0.0686 0.766079,-0.0343 0.766079,-0.01143 0.777513,0.01143 0.766079,0.0343 0.754645,0.0686 0.766079,0.102906 0.754645,0.11434 0.754646,0.160077 0.754645,0.17151 0.731777,0.205812 0.731777,0.22868 0.731777,0.251549 0.708909,0.274416 0.708909,0.308719 0.686041,0.331586 0.686041,0.354455 0.674607,0.377322 0.651739,0.400191 0.640304,0.434492 0.617437,0.445927 0.606003,0.468795 0.594569,0.491662 0.571701,0.514531 0.560267,0.537399 0.537398,0.548833 0.514531,0.5717 0.491663,0.594569 0.480229,0.606003 0.445926,0.628871 0.434493,0.640305 0.40019,0.651739 0.388757,0.674607 0.354454,0.686041 0.331587,0.686041 0.308718,0.708909 0.285851,0.720343 0.262982,0.731777 0.22868,0.731777 0.205813,0.743211 0.17151,0.754645 0.148642,0.754642 0.125774,0.76608 0.102906,0.76608 0.0686,0.76608 0.0343,0.76608 0.01143,0.77751 v 35.697 l -0.01143,0.76608 -0.0343,0.76608 -0.0686,0.76608 -0.102906,0.75464 -0.11434,0.76608 -0.148642,0.75465 -0.182944,0.74321 -0.205813,0.74321 -0.22868,0.73178 -0.251548,0.72034 -0.274417,0.70891 -0.308718,0.70891 -0.331587,0.69747 -0.354454,0.67461 -0.377323,0.67461 -0.40019,0.65174 -0.434493,0.6403 -0.445926,0.61744 -0.468795,0.606 -0.491663,0.59457 -0.514531,0.5717 -0.537398,0.56027 -0.548833,0.5374 -0.571701,0.51453 -0.594569,0.49166 -0.606003,0.48023 -0.62887,0.44593 -0.640305,0.43449 -0.651739,0.40019 -0.674607,0.38875 -0.686041,0.35446 -0.686041,0.33159 -0.708909,0.30871 -0.720343,0.28585 -0.731777,0.26299 -0.731777,0.22868 -0.743211,0.20581 -0.754645,0.17151 -0.754645,0.16008 -0.76608,0.11434 -0.754645,0.1029 -0.777513,0.0686 -0.766079,0.0343 -0.777513,0.0229 -0.766079,-0.0229 -0.766079,-0.0343 -0.766079,-0.0686 -0.754645,-0.1029 -0.766079,-0.11434 -0.743211,-0.14865 -0.754645,-0.18294 -0.743212,-0.19438 -0.731777,-0.22868 -0.720343,-0.26298 -0.708909,-0.27442 -0.708909,-0.30872 -0.697475,-0.33158 -0.674607,-0.35446 -0.674606,-0.37732 -0.651739,-0.40019 -0.640305,-0.42306 -0.617437,-0.45736 -0.606003,-0.46879 -0.594569,-0.49167 -0.571701,-0.51453 -0.560266,-0.52596 -0.537399,-0.56027 -0.514531,-0.5717 -0.491663,-0.59457 -0.480228,-0.606 -0.445927,-0.62887 -0.434493,-0.64031 -0.40019,-0.65174 -0.388757,-0.6746 -0.354454,-0.67461 -0.331587,-0.69748 -0.308718,-0.7089 -0.285851,-0.72035 -0.262982,-0.73177 -0.22868,-0.73178 -0.205813,-0.74321 -0.17151,-0.75465 -0.160076,-0.75464 -0.11434,-0.75465 -0.102906,-0.76608 -0.0686,-0.77751 -0.0343,-0.76608 -0.02287,-0.76608 z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:none" />
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out put :

How to extract numeric values contained in xml file comments?

I would like to extract 2 lists of numeric numbers contained in the comments of my .xml (svg) file:
The second list has a variable position in the xml file (here: r1[[2]][[6]]) so I would like to find some index for the comment text:
Here is my current result, OK but index found by hand.
r1[[2]][[2]]
r1[[2]][[6]]
This code is working but I needed to find r1[[1]][[6]] index 6 by hand.
library(XML)
filepath1 <- paste("MyPath\\", sep="")
filename.cbv <- paste(filepath1,"CBV_Simpler.svg",sep="")
xml.cbv <- xmlTreeParse(filename.cbv,asText = FALSE)
r1 <- xmlRoot(xml.cbv) ##get the top node of the document
xmlSize(r1) # 2 nodes only, our data are under node 2
r1[[2]][[2]]
r1[[2]][[6]]
leftHemishpval1 <- xmlValue(r1[[2]][[2]])
righttHemishpval1 <- xmlValue(r1[[2]][[6]])
My SVG example file is here:
<svg xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
version="1.1"
width="1070"
height="1200"
zoomAndPan="magnify">
<text x="520" y="20" text-anchor="middle" font-size="18" font-family="Arial">Test Image</text>
<g transform="translate(20, 50) scale(1, 1)" font-family="Arial">
<g transform="translate(0, 250) scale(1, -1)">
<polygon points="0,0 1000,0 1000,200 0,200" style="stroke-width:1;stroke:#000000;fill:#ffffff" />
</g>
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<text x="500" y="20" text-anchor="middle" font-size="14">Left (median = 1.234, μ = 1.2345, σ = +/-0.1234)</text>
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Using the xml2 library, read the file
xml <- read_xml(filename.cbv)
the 'xpath' (this section of the specification provides a succinct overview of the XPath syntax, useful for many basic processing steps) to comment nodes can be specified in various ways; for your document above where you are interested in all comments, a path is //comment() and the nodes can be found with
comments <- xml_find_all(xml, "//comment()")
These can be coerced into a character vector with
value <- as.character(comments)
though one still needs to parse these for use in R, e.g., with
read.csv(textConnection(value[[1]]), skip=2, header = FALSE, nrow = 15)
or maybe a little more robustly (but still depending on knowledge of the internal structure of the comment) by trimming the first two (tail(txt, -2)) and the last (head(., -1)) lines from the comment before parsing
txt <- textConnection(value[[1]])
read.csv(text = head(tail(txt, -2), -1), header = FALSE)
I think the parsing step with the XML package is
xml <- xmlParse(filename.cbv)
value <- xpathApply(xml, "//comment()", as, "character")

2D map to graph in Sml

I have a 2D map as input from a file ,line by line and I want to save it and run a Bfs or Dijkstra to find the shortest path from Start (marked as S ) to end (marked as E),what's the proper structure to save the information? My implementation in c++ was with a graph,but I find it hard to do so in sml,because I can't link the nodes both ways.

You can do it using mutable arrays. This is an extremely minimal adjacency matrix implementation using an array of array of int option. The edge between vertex i and j is given by the value in the ith row and jth column. If the value is None then there is no edge and if the value is Some w than the edge exists and has weight w.
let is_some opt =
match opt with
| None -> false
| _ -> true;;
let unwrap opt =
match opt with
| None -> raise (Failure "unwrapped None")
| Some x -> x;;
let add_edge g u v w =
let us = Array.get g u in
Array.set us v (Some w);;
let get_edge g u v =
let us = Array.get g u in
Array.get us v;;
let make_graph vertices =
Array.make_matrix vertices vertices None;;
let neighbors g u =
Array.get g u |>
Array.to_list |>
List.filter is_some |>
List.mapi (fun i o -> (i, unwrap o));;
let g = make_graph 4;;
add_edge g 0 1 2;;
add_edge g 0 2 3;;
add_edge g 0 3 5;;
add_edge g 1 2 7;;
add_edge g 1 3 11;;
add_edge g 2 3 13;;
add_edge g 3 0 17;;
List.iter (fun (v, e) -> Printf.printf "0-(%i)->%i\n" e v) (neighbors g 0);;
This is in OCaml, but the differences between SML and OCaml are, for the most part, minor.

Animate fill of path element in SVG using css

I am trying to animate both the stroke and the fill of a path element (some text). The animation starts with no visible stroke or fill. When the animation finishes I would like the element to be filled in black.
Starting state is an empty circle.
The current end state of the animation is:
The desired end state of the animation is:
I have been able to animate the stroke adequately but not the fill. Apparently the fill animation works in chrome 43, but in chrome 45 and firefox v35 it does not. Find the relevant css and html in the below snippet or on codepen.
#text {
stroke: black !important;
stroke-width: 2;
fill: transparent !important;
stroke-dasharray: 700;
stroke-dashoffset: 700;
animation: dash 3s linear infinite;
}
#keyframes dash {
to {
stroke-dashoffset: 0;
/* does not work don't know why */
fill: black !important;
}
}
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
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xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" inkscape:export-ydpi="36.340767" inkscape:export-xdpi="36.340767" inkscape:export-filename="/home/da/code/fb-agg/public/assets/images/fube-logo.png" sodipodi:docname="fube-logo.plain.svg" inkscape:version="0.48.4 r9939"
version="1.1" id="svg2" height="400" width="400">
<defs id="defs4" />
<sodipodi:namedview id="base" pagecolor="#ffffff" bordercolor="#666666" borderopacity="1.0" inkscape:pageopacity="0.0" inkscape:pageshadow="2" inkscape:zoom="2" inkscape:cx="216.69893" inkscape:cy="212.10363" inkscape:document-units="px" inkscape:current-layer="svg2"
showgrid="false" inkscape:window-width="1920" inkscape:window-height="1063" inkscape:window-x="-1" inkscape:window-y="-15" inkscape:window-maximized="1" />
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<cc:Work rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
<dc:title></dc:title>
</cc:Work>
</rdf:RDF>
</metadata>
<g inkscape:label="Layer 1" inkscape:groupmode="layer" id="layer1" transform="translate(0,-652.36218)">
<path sodipodi:type="arc" style="fill:#ff0000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:3.68879914;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" id="circle" sodipodi:cx="181.06984"
sodipodi:cy="177.76643" sodipodi:rx="145.20943" sodipodi:ry="134.3503" d="m 326.27927,177.76643 a 145.20943,134.3503 0 1 1 -290.418857,0 145.20943,134.3503 0 1 1 290.418857,0 z" transform="matrix(1.3037878,0,0,1.409169,-36.076648,601.85923)" inkscape:export-filename="/home/da/code/fb-agg/public/assets/images/fube-logo.png"
inkscape:export-xdpi="36.340767" inkscape:export-ydpi="36.340767" />
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You can't use !important in keyframes (well you can but it has no effect). Presumably Chrome 43 had this bug but it's fixed by Chrome 45.
You can make it work by removing the !important from the keyframe and the original fill style and also removing the fill style from the path so you don't need the !important to force the override in the first place.
#text {
stroke: black !important;
stroke-width: 2;
fill: transparent;
stroke-dasharray: 700;
stroke-dashoffset: 700;
animation: dash 3s linear infinite;
}
#keyframes dash {
to {
stroke-dashoffset: 0;
/* works, know why */
fill: black;
}
}
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2-D FFT using MPI_Alltoall in MPI

I have a 4X6 matrix split as two 2X6 matrices on 2 processors. Since the rows have been split in a contiguous way (C Language) on the processors, we can carry out a 1-D FFT on the rows. The problem is we need an MPI_Alltoall() to collect contiguous columns on a particular processor for 1-D column FFT i.e. Processor 0 has:
A B C D E F
G H I J K L
Processor 1 has:
M N O P Q R
S T U V W X
The MPI_Alltoall() needs to convert this to the following on Processor 0:
A G M S
B H N T
C I O U
And the following on Processor 2:
D J P V
E K Q W
F L R X
I tried to define a vector having count=2, blocklength=1, stride=6 as the sending type vector, set its extent to MPI_INT, displacement to 0 and sent 3 instances of this vector using MPI_Alltoall(). This according to me should send A G, B H, and C I to processor 0 and D J, E K, and F L to processor 1. Similarly M S, N T, and O U to processor 0 and P V, Q W, and R X to processor 1.
Is my interpretation correct ? If yes, then how do I receive these 3 instances of vectors on the receiving side ( What/How do I define the datatype?).

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