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text options!

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This commit is contained in:
Will Charczuk 2016-07-29 16:36:29 -07:00
parent b3386853bb
commit d84d6790c0
25 changed files with 526 additions and 287 deletions
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89
vector_renderer.go
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@ -110,30 +110,28 @@ func (vr *vectorRenderer) Close() {
// Stroke draws the path with no fill.
func (vr *vectorRenderer) Stroke() {
vr.drawPath(vr.s.SVGStroke())
vr.drawPath(vr.s.GetStrokeOptions())
}
// Fill draws the path with no stroke.
func (vr *vectorRenderer) Fill() {
vr.drawPath(vr.s.SVGFill())
vr.drawPath(vr.s.GetFillOptions())
}
// FillStroke draws the path with both fill and stroke.
func (vr *vectorRenderer) FillStroke() {
s := vr.s.SVGFillAndStroke()
vr.drawPath(s)
vr.drawPath(vr.s.GetFillAndStrokeOptions())
}
// drawPath draws a path.
func (vr *vectorRenderer) drawPath(s Style) {
vr.c.Path(strings.Join(vr.p, "\n"), &s)
vr.c.Path(strings.Join(vr.p, "\n"), vr.s.GetFillAndStrokeOptions())
vr.p = []string{} // clear the path
}
// Circle implements the interface method.
func (vr *vectorRenderer) Circle(radius float64, x, y int) {
style := vr.s.SVGFillAndStroke()
vr.c.Circle(x, y, int(radius), &style)
vr.c.Circle(x, y, int(radius), vr.s.GetFillAndStrokeOptions())
}
// SetFont implements the interface method.
@ -153,8 +151,7 @@ func (vr *vectorRenderer) SetFontSize(size float64) {
// Text draws a text blob.
func (vr *vectorRenderer) Text(body string, x, y int) {
style := vr.s.SVGText()
vr.c.Text(x, y, body, &style)
vr.c.Text(x, y, body, vr.s.GetTextOptions())
}
// MeasureText uses the truetype font drawer to measure the width of text.
@ -200,22 +197,82 @@ func (c *canvas) Start(width, height int) {
c.w.Write([]byte(fmt.Sprintf(`<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="%d" height="%d">\n`, c.width, c.height)))
}
func (c *canvas) Path(d string, style *Style) {
func (c *canvas) Path(d string, style Style) {
var strokeDashArrayProperty string
if len(style.StrokeDashArray) > 0 {
strokeDashArrayProperty = style.SVGStrokeDashArray()
strokeDashArrayProperty = c.getStrokeDashArray(style)
}
c.w.Write([]byte(fmt.Sprintf(`<path %s d="%s" style="%s"/>\n`, strokeDashArrayProperty, d, style.SVG(c.dpi))))
c.w.Write([]byte(fmt.Sprintf(`<path %s d="%s" style="%s"/>\n`, strokeDashArrayProperty, d, c.styleAsSVG(style))))
}
func (c *canvas) Text(x, y int, body string, style *Style) {
c.w.Write([]byte(fmt.Sprintf(`<text x="%d" y="%d" style="%s">%s</text>`, x, y, style.SVG(c.dpi), body)))
func (c *canvas) Text(x, y int, body string, style Style) {
c.w.Write([]byte(fmt.Sprintf(`<text x="%d" y="%d" style="%s">%s</text>`, x, y, c.styleAsSVG(style), body)))
}
func (c *canvas) Circle(x, y, r int, style *Style) {
c.w.Write([]byte(fmt.Sprintf(`<circle cx="%d" cy="%d" r="%d" style="%s">`, x, y, r, style.SVG(c.dpi))))
func (c *canvas) Circle(x, y, r int, style Style) {
c.w.Write([]byte(fmt.Sprintf(`<circle cx="%d" cy="%d" r="%d" style="%s">`, x, y, r, c.styleAsSVG(style))))
}
func (c *canvas) End() {
c.w.Write([]byte("</svg>"))
}
// getStrokeDashArray returns the stroke-dasharray property of a style.
func (c *canvas) getStrokeDashArray(s Style) string {
if len(s.StrokeDashArray) > 0 {
var values []string
for _, v := range s.StrokeDashArray {
values = append(values, fmt.Sprintf("%0.1f", v))
}
return "stroke-dasharray=\"" + strings.Join(values, ", ") + "\""
}
return ""
}
// GetFontFace returns the font face for the style.
func (c *canvas) getFontFace(s Style) string {
family := "sans-serif"
if s.GetFont() != nil {
name := s.GetFont().Name(truetype.NameIDFontFamily)
if len(name) != 0 {
family = fmt.Sprintf(`'%s',%s`, name, family)
}
}
return fmt.Sprintf("font-family:%s", family)
}
// styleAsSVG returns the style as a svg style string.
func (c *canvas) styleAsSVG(s Style) string {
sw := s.StrokeWidth
sc := s.StrokeColor
fc := s.FillColor
fs := s.FontSize
fnc := s.FontColor
strokeWidthText := "stroke-width:0"
if sw != 0 {
strokeWidthText = "stroke-width:" + fmt.Sprintf("%d", int(sw))
}
strokeText := "stroke:none"
if !sc.IsZero() {
strokeText = "stroke:" + sc.String()
}
fillText := "fill:none"
if !fc.IsZero() {
fillText = "fill:" + fc.String()
}
fontSizeText := ""
if fs != 0 {
fontSizeText = "font-size:" + fmt.Sprintf("%.1fpx", drawing.PointsToPixels(c.dpi, fs))
}
if !fnc.IsZero() {
fillText = "fill:" + fnc.String()
}
fontText := c.getFontFace(s)
return strings.Join([]string{strokeWidthText, strokeText, fillText, fontSizeText, fontText}, ";")
}