// ASCIIArt2SVG converts two-dimensional ASCII art read from r to a SVG
// written to w.
// xScale denotes the number of pixels to scale each unit on the x-axis to.
// yScale denotes the number of pixels to scale each unit on the y-axis to.
func ASCIIArt2SVG(w io.Writer, r io.Reader, xScale, yScale float64) error {
aa, err := ioutil.ReadAll(r)
if err != nil {
return err
}
p := asciiart.NewParser()
if err := p.SetScale(xScale, yScale); err != nil {
return err
}
grid, err := p.Parse(string(aa))
if err != nil {
return err
}
if err := svg.Generate(w, grid); err != nil {
return err
}
return nil
}
// STARTMAIN OMIT
func main() {
p := asciiart.NewParser()
p.SetScale(1, 1)
grid, err := p.Parse(asciiArt)
if err != nil {
log.Fatal(err)
}
var traverse func(elems []interface{}, indent string)
fmtJsn := func(j map[string]interface{}) string { b, _ := json.Marshal(j); return string(b) }
fmtFlt := func(f float64) string { return strconv.FormatFloat(f, 'f', -1, 64) }
fmt.Println("grid", grid.W, grid.H)
// ENDMAIN OMIT
// STARTTRAVERSE OMIT
traverse = func(elems []interface{}, indent string) {
var p []string
for _, elem := range elems {
switch t := elem.(type) {
case *asciiart.Rectangle:
fmt.Println(indent, "rect", t.X, t.Y, t.W, t.H, fmtJsn(t.Ref))
traverse(t.Elems, indent+" ") // recursion // HL
case *asciiart.Line:
fmt.Println(indent, "line", t.X1, t.Y1, t.X2, t.Y2)
case *asciiart.Polyline:
for i := 0; i < len(t.X); i++ {
p = append(p, fmtFlt(t.X[i]), fmtFlt(t.Y[i]))
}
fmt.Println(indent, "polyline", strings.Join(p, " "))
case *asciiart.Polygon:
for i := 0; i < len(t.X); i++ {
p = append(p, fmtFlt(t.X[i]), fmtFlt(t.Y[i]))
}
fmt.Println(indent, "polygon", strings.Join(p, " "))
case *asciiart.Textline:
fmt.Println(indent, "textline", t.X, t.Y, t.Text)
}
}
}
// ENDTRAVERSE OMIT
// STARTMAIN2 OMIT
traverse(grid.Elems, " ")
}
func TestGenerate(t *testing.T) {
p := asciiart.NewParser()
fis, err := ioutil.ReadDir("testdata")
assert.NoError(t, err)
for _, fi := range fis {
inFN := fi.Name()
if strings.HasSuffix(inFN, ".txt") {
input, err := ioutil.ReadFile(filepath.Join("testdata", inFN))
assert.NoError(t, err)
g, err := p.Parse(string(input))
assert.NoError(t, err)
var svg bytes.Buffer
err = Generate(&svg, g)
assert.NoError(t, err)
outFN := strings.TrimSuffix(inFN, ".txt") + ".svg"
output, err := ioutil.ReadFile(filepath.Join("testdata", outFN))
assert.NoError(t, err)
assert.Equal(t, string(output), svg.String())
}
}
}