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switch to own SVG of the Swiss cross

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Compared to the Adobe Illustrator-exported version from SIX,
this version is defined on a 166px x 166px viewbox,
which are the recommended dimensions with which the cross
should be overlaid on top of QR codes.

This versions visually matches the PNG version from SIX
when rendered onto the same pixel size (166px x 166px).

But, this version scales better!
The SIX version does not render correctly.
My guess is that it might have to do with their
use of floating point coordinates.
This commit is contained in:
Michael Stapelberg
2020-11-10 23:39:48 +01:00
parent 432a09f354
commit f39a23b8dc
4 changed files with 12 additions and 3 deletions
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2
GENERATED_swisscross.go
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File diff suppressed because one or more lines are too long

2
generate.go
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@@ -14,4 +14,4 @@
package qrbill
//go:generate sh -c "go run third_party/goembed/goembed.go -package qrbill -var swisscross third_party/swiss-cross/CH-Kreuz_7mm/CH-Kreuz_7mm.png third_party/swiss-cross/CH-Kreuz_7mm/CH-Kreuz_7mm.svg > GENERATED_swisscross.go && gofmt -w GENERATED_swisscross.go"
//go:generate sh -c "go run third_party/goembed/goembed.go -package qrbill -var swisscross third_party/swiss-cross/CH-Kreuz_7mm/CH-Kreuz_7mm.png third_party/swiss-cross/CH-Kreuz_7mm/CH-Kreuz_7mm.svg swisscross.svg > GENERATED_swisscross.go && gofmt -w GENERATED_swisscross.go"

4
qrbill.go
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@@ -277,11 +277,11 @@ func (b *Bill) EncodeToSVG() ([]byte, error) {
}
// overlay the swiss cross
cross := swisscross["third_party/swiss-cross/CH-Kreuz_7mm/CH-Kreuz_7mm.svg"]
cross := swisscross["swisscross.svg"]
// Remove XML document header, we embed the <svg> element:
cross = bytes.ReplaceAll(cross, []byte(`<?xml version="1.0" encoding="utf-8"?>`), nil)
// Overwrite position and size of the embedded <svg> element:
cross = bytes.ReplaceAll(cross, []byte(`x="0px" y="0px"`), []byte(`x="549" y="549" width="166" height="166"`))
cross = bytes.ReplaceAll(cross, []byte(`<svg x="0" y="0" width="166" height="166"`), []byte(`<svg x="549" y="549" width="166" height="166"`))
// Inject the swiss cross into the <svg> document:
return bytes.ReplaceAll(qrCodeSVG, []byte(`</g>`), append(cross, []byte("</g>")...)), nil

7
swisscross.svg Normal file
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@@ -0,0 +1,7 @@
<?xml version="1.0" encoding="utf-8"?>
<svg x="0" y="0" width="166" height="166" viewBox="0 0 166 166" version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
<rect x="0" y="0" width="166" height="166" fill="white"></rect>
<rect x="12" y="12" width="142" height="142" fill="black"></rect>
<rect x="36" y="66" width="94" height="28" fill="white"></rect>
<rect x="68" y="34" width="30" height="92" fill="white"></rect>
</svg>
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