Bad rendering #106
Comments
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Looks to be working fine in this example in all 4 formats. package main
import (
"context"
"fmt"
"log"
"os"
"github.com/goccy/go-graphviz"
)
func main() {
ctx := context.Background()
gv, err := graphviz.ParseBytes([]byte(`
strict graph gr {
ranksep=".4"
nodesep=.05
margin=.05;
outputMode="edgesfirst";
node [shape=box, height=0, width=0, style=filled, fontsize=12, color="#ffc0c0", fontname="Helvetica"];
n0 [label="top"];
n1 [label="smain", style=bold, color="#ff0000"];
n3 [label="np", style=bold, color="#ff0000"];
n6 [label="ppart", style=bold, color="#ff0000"];
node [fontname="Helvetica-Oblique", color="#c0c0ff"];
n2 [label="werd"];
n4 [label="groot", style=bold, color="#0000ff"];
n5 [label="alarm", style=bold, color="#0000ff"];
n7 [label="Wel"];
n8 [label="meteen"];
n10 [label="geslagen"];
{rank=same; edge[style=invis]; n7 -- n2 -- n8 -- n4 -- n5 -- n10}
edge [sametail=true, samehead=true, color="#d3d3d3", fontname="Helvetica", fontsize=10];
n0 -- n1 [label=" -- "];
n1 -- n2 [label=" hd "];
n1 -- n3 [label=" su ", color="#000000"];
n1 -- n6 [label=" vc "];
n3 -- n4 [label=" mod ", color="#000000"];
n3 -- n5 [label=" hd ", color="#000000"];
n6 -- n7 [label=" mod "];
n6 -- n8 [label=" mod "];
n6 -- n3 [label=" svp ", color="#000000"];
n6 -- n10 [label=" hd "];
}`))
if err != nil {
log.Fatal("failed to parse graphviz: ", err)
}
g, err := graphviz.New(ctx)
if err != nil {
log.Fatal("failed to create graphviz: ", err)
}
formats := []graphviz.Format{graphviz.PNG, graphviz.SVG, graphviz.JPG, graphviz.XDOT}
for _, format := range formats {
f, err := os.Create(fmt.Sprintf("example.%s", format))
if err != nil {
log.Fatal("failed to create file: ", err)
}
defer f.Close()
if err := g.Render(ctx, gv, format, f); err != nil {
// don't exit here, just log the error
fmt.Printf("failed to render graph to %s: %v\n", format, err)
}
}
} |
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Running this code I get what you see below. Only the svg version (top right) looks identical to the original (top left).
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Or is it a library version thing? This is my |
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I ran it on Maybe try to run it in docker on a different platform |
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Same bug with rendering edges happens on my platform also (which is actually Github codespace) From go.mod
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It’s likely an issue with the feature you are using. Does the rendering break with a simpler example as well ? If not, please provide a minimal sample. |
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An example, I skipped a lot of things to get a really slim code sample. package main
import (
"context"
gv "github.com/goccy/go-graphviz"
)
func main() {
ctx := context.Background()
g, _ := gv.New(ctx)
graph, _ := g.Graph()
a, _ := graph.CreateNodeByName("a")
b, _ := graph.CreateNodeByName("b")
c, _ := graph.CreateNodeByName("c")
d, _ := graph.CreateNodeByName("d")
e, _ := graph.CreateNodeByName("e")
f, _ := graph.CreateNodeByName("f")
a.Root().CreateEdgeByName("a-b", a, b)
a.Root().CreateEdgeByName("a-c", a, c)
b.Root().CreateEdgeByName("b-c", b, c)
a.Root().CreateEdgeByName("a-d", a, d)
d.Root().CreateEdgeByName("d-e", d, e)
e.Root().CreateEdgeByName("e-f", e, f)
g.RenderFilename(ctx, graph, "png", "sample.png")
}Output // instead of RenderFilename
buff := new(bytes.Buffer)
g.Render(ctx, graph, "svg", buff)
ioutil.WriteFile("sample.svg", buff.Bytes(), fs.ModePerm)Output So probably this is either specific to |
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I'm also creating a PNG image. Running on mac, golang 1.22.9. I tried several go-graphvzi versions, it happens starting on v0.2.1, the graph is correct with v0.2.0, so it's highly likely due to this PR #92 according to v0.2.0...v0.2.1 This PR just fixes #24, the images wasn't render correctly previously before 0.2.1, this PR fixes it. So by default looks like the edge use that chubby style. But if I tried set the edge style it doesn't work Not sure where does the |
Rendering of this graph is all wrong:
How it should look (rendered with the
dotprogram):How it looks:
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