Golang code-google-com-p-plotinum-vg.Font类(方法)实例源码

func (c *Canvas) FillString(fnt vg.Font, x, y vg.Length, str string) {
	t := new(pdf.Text)
	t.SetFont(fnt.Name(), unit(fnt.Size))
	t.NextLineOffset(unit(x), unit(y))
	t.Text(str)
	c.page.DrawText(t)
}

func (c *Canvas) FillString(font vg.Font, x, y vg.Length, str string) {
	c.gc.Save()
	c.gc.Translate(x.Dots(c), (y + font.Extents().Ascent).Dots(c))
	c.gc.Scale(1, -1)
	c.gc.DrawImage(c.textImage(font, str))
	c.gc.Restore()
}

func (c *Canvas) FillString(font vg.Font, x, y vg.Length, str string) {
	fontStr, ok := fontMap[font.Name()]
	if !ok {
		panic(fmt.Sprintf("Unknown font: %s", font.Name()))
	}
	sty := style(fontStr,
		elm("font-size", "medium", "%.*gpt", pr, font.Size.Points()),
		elm("fill", "#000000", colorString(c.cur().color)))
	if sty != "" {
		sty = "\n\t" + sty
	}
	fmt.Fprintf(c.buf, `<text x="%.*g" y="%.*g" transform="scale(1, -1)"%s>%s</text>`+"\n",
		pr, x.Dots(c), pr, -y.Dots(c), sty, str)
}

func (c *XImgCanvas) FillString(font vg.Font, x, y vg.Length, str string) {
	c.gc.Save()
	defer c.gc.Restore()

	data, ok := fontMap[font.Name()]
	if !ok {
		panic(fmt.Sprintf("Font name %s is unknown", font.Name()))
	}
	if !registeredFont[font.Name()] {
		draw2d.RegisterFont(data, font.Font())
		registeredFont[font.Name()] = true
	}
	c.gc.SetFontData(data)
	c.gc.Translate(x.Dots(c), y.Dots(c))
	c.gc.Scale(1, -1)
	c.gc.FillString(str)
}

func (e *Canvas) FillString(fnt vg.Font, x, y vg.Length, str string) {
	if e.cur().font != fnt.Name() || e.cur().fsize != fnt.Size {
		e.cur().font = fnt.Name()
		e.cur().fsize = fnt.Size
		fmt.Fprintf(e.buf, "/%s findfont %.*g scalefont setfont\n",
			fnt.Name(), pr, fnt.Size)
	}
	fmt.Fprintf(e.buf, "%.*g %.*g moveto\n", pr, x.Dots(e), pr, y.Dots(e))
	fmt.Fprintf(e.buf, "(%s) show\n", str)
}

func (c *Canvas) textImage(font vg.Font, str string) *image.RGBA {
	w := font.Width(str).Dots(c)
	h := font.Extents().Height.Dots(c)
	img := image.NewRGBA(image.Rect(0, 0, int(w+0.5), int(h+0.5)))
	gc := draw2d.NewGraphicContext(img)

	gc.SetDPI(int(c.DPI()))
	gc.SetFillColor(c.color[len(c.color)-1])
	gc.SetStrokeColor(c.color[len(c.color)-1])
	data, ok := fontMap[font.Name()]
	if !ok {
		panic(fmt.Sprintf("Font name %s is unknown", font.Name()))
	}

	if !registeredFont[font.Name()] {
		draw2d.RegisterFont(data, font.Font())
		registeredFont[font.Name()] = true
	}

	gc.SetFontData(data)
	gc.SetFontSize(font.Size.Points())
	gc.MoveTo(0, h+font.Extents().Descent.Dots(c))
	gc.FillString(str)

	return img
}