本文整理汇总了Golang中github.com/golang/freetype.Pt函数的典型用法代码示例。如果您正苦于以下问题:Golang Pt函数的具体用法?Golang Pt怎么用?Golang Pt使用的例子?那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了Pt函数的20个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的Golang代码示例。
示例1: makeImage
func makeImage(req *http.Request, caption, font string, pt, size, border, scale int, f func(x, y int) uint32) *image.RGBA {
d := (size + 2*border) * scale
csize := 0
if caption != "" {
if pt == 0 {
pt = 11
}
csize = pt * 2
}
c := image.NewRGBA(image.Rect(0, 0, d, d+csize))
// white
u := &image.Uniform{C: color.White}
draw.Draw(c, c.Bounds(), u, image.ZP, draw.Src)
for y := 0; y < size; y++ {
for x := 0; x < size; x++ {
r := image.Rect((x+border)*scale, (y+border)*scale, (x+border+1)*scale, (y+border+1)*scale)
rgba := f(x, y)
u.C = color.RGBA{byte(rgba >> 24), byte(rgba >> 16), byte(rgba >> 8), byte(rgba)}
draw.Draw(c, r, u, image.ZP, draw.Src)
}
}
if csize != 0 {
if font == "" {
font = "data/luxisr.ttf"
}
ctxt := fs.NewContext(req)
dat, _, err := ctxt.Read(font)
if err != nil {
panic(err)
}
tfont, err := freetype.ParseFont(dat)
if err != nil {
panic(err)
}
ft := freetype.NewContext()
ft.SetDst(c)
ft.SetDPI(100)
ft.SetFont(tfont)
ft.SetFontSize(float64(pt))
ft.SetSrc(image.NewUniform(color.Black))
ft.SetClip(image.Rect(0, 0, 0, 0))
wid, err := ft.DrawString(caption, freetype.Pt(0, 0))
if err != nil {
panic(err)
}
p := freetype.Pt(d, d+3*pt/2)
p.X -= wid.X
p.X /= 2
ft.SetClip(c.Bounds())
ft.DrawString(caption, p)
}
return c
}
开发者ID:lucmichalski,项目名称:qr-server,代码行数:57,代码来源:pic.go
示例2: CenterX
// CenterX returns the Point at which string s will be centered within rect r
// along the X coordinate when passed to c.DrawString. The Y coordinate will be 0.
// Clip is set to r before returning.
func CenterX(c *freetype.Context, s string, r image.Rectangle) (fixed.Point26_6, error) {
w, err := DrawWidth(c, s)
c.SetClip(r)
if err != nil {
return fixed.Point26_6{}, err
}
half := Int26_6(0.5)
xmin := freetype.Pt(r.Min.X, 0)
return freetype.Pt(r.Dx(), 0).Mul(half).Sub(w.Mul(half)).Add(xmin), nil
}
开发者ID:infogulch,项目名称:fontutil,代码行数:13,代码来源:util.go
示例3: Render
func (f *Font) Render(text string) *Texture {
width, height, yBearing := f.TextDimensions(text)
font := f.ttf
size := f.Size
// Colors
fg := image.NewUniform(color.NRGBA{f.FG.R, f.FG.G, f.FG.B, f.FG.A})
bg := image.NewUniform(color.NRGBA{f.BG.R, f.BG.G, f.BG.B, f.BG.A})
// Create the font context
c := freetype.NewContext()
nrgba := image.NewNRGBA(image.Rect(0, 0, width, height))
draw.Draw(nrgba, nrgba.Bounds(), bg, image.ZP, draw.Src)
c.SetDPI(dpi)
c.SetFont(font)
c.SetFontSize(size)
c.SetClip(nrgba.Bounds())
c.SetDst(nrgba)
c.SetSrc(fg)
// Draw the text.
pt := freetype.Pt(0, int(yBearing))
_, err := c.DrawString(text, pt)
if err != nil {
log.Println(err)
return nil
}
// Create texture
imObj := &ImageObject{nrgba}
return NewTexture(imObj)
}
开发者ID:Kunde21,项目名称:engi,代码行数:35,代码来源:font.go
示例4: updateTexture
func (font *Font) updateTexture(texture uint32, text string, width int, height int, size float64, dpi float64, rgba color.Color) (int, int) {
context := freetype.NewContext()
context.SetFont(font.ttf)
img := image.NewRGBA(image.Rect(0, 0, width, height))
r, g, b, _ := rgba.RGBA()
draw.Draw(img, img.Bounds(), image.NewUniform(color.RGBA{uint8(r), uint8(g), uint8(b), 0}), image.ZP, draw.Src)
context.SetDst(img)
context.SetClip(img.Bounds())
context.SetSrc(image.NewUniform(rgba))
context.SetFontSize(size)
context.SetDPI(dpi)
pixelBounds, _ := context.DrawString(text, freetype.Pt(0, height/2))
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, texture)
gl.TexSubImage2D(
gl.TEXTURE_2D,
0,
0,
0,
int32(img.Rect.Size().X),
int32(img.Rect.Size().Y),
gl.RGBA,
gl.UNSIGNED_BYTE,
gl.Ptr(img.Pix))
return int26_6Ceiling(pixelBounds.X + 0x3f), int26_6Ceiling(pixelBounds.Y + 0x3f)
}
开发者ID:anthonyrego,项目名称:gosmf,代码行数:31,代码来源:font.go
示例5: drawStringImage
func (this *Signer) drawStringImage(text string) (image.Image, error) {
fontBytes, err := ioutil.ReadFile(this.fontPath)
if err != nil {
fmt.Println(err)
}
font, err := freetype.ParseFont(fontBytes)
if err != nil {
fmt.Println(err)
}
rgba := image.NewRGBA(image.Rect(0, 0, 900, 900))
draw.Draw(rgba, rgba.Bounds(), image.Black, image.ZP, draw.Src)
c := freetype.NewContext()
c.SetDPI(this.dpi)
c.SetFontSize(this.fontSize)
c.SetClip(rgba.Bounds())
c.SetDst(rgba)
c.SetSrc(image.White)
c.SetFont(font)
pt := freetype.Pt(100, 100+int(c.PointToFixed(this.fontSize)>>8))
for _, s := range strings.Split(text, "\r\n") {
_, err = c.DrawString(s, pt)
pt.Y += c.PointToFixed(12 * 1.5)
}
return rgba, nil
}
开发者ID:madong-fun,项目名称:golang-study,代码行数:32,代码来源:drawImage.go
示例6: drawBarcode
func drawBarcode(img *image.Gray, unitSize, xPos, yPos float64, num int) {
drawSO(img, unitSize, xPos, yPos)
x := xPos + unitSize*4.0
// Draw reference bar
x += drawBar(img, unitSize, x, yPos, 0) + unitSize
// Print the form number below the barcode
ftContext.SetFontSize(7)
ftContext.SetSrc(image.NewUniform(color.Black))
ftContext.DrawString(fmt.Sprintf("%d", num), freetype.Pt(int(x), int(yPos+unitSize*7)))
// Draw bars
ds := toBase4(num, 9)
for i := len(ds) - 1; i >= 0; i-- {
x += drawBar(img, unitSize, x, yPos, ds[i]) + unitSize
}
// Draw checksum bars
ckBase10 := csumGen(num)
fmt.Println("ckBase10 = ", ckBase10)
ck := toBase4(ckBase10, 2)
fmt.Println("ck = ", ck)
for i := len(ck) - 1; i >= 0; i-- {
x += drawBar(img, unitSize, x, yPos, ck[i]) + unitSize
}
}
开发者ID:GradeDeck,项目名称:gdformgen,代码行数:28,代码来源:main.go
示例7: Example
func Example() {
// As usual in examples, this ignores all errors. Don't do this in your program.
// setup and find start point for centering
s := "Hello, World!"
size := image.Rect(0, 0, 120, 20)
dst := image.NewRGBA(size)
c := freetype.NewContext()
c.SetFont(font)
c.SetFontSize(14.0)
c.SetSrc(image.NewUniform(color.Black))
c.SetDst(dst)
start, _ := fontutil.CenterX(c, s, size) // CenterX calls c.SetClip(size)
// perform draw at start.X + y 16
c.DrawString(s, start.Add(freetype.Pt(0, 16)))
// write the image out to a file
// out, _ := os.Create("helloworld.png")
// defer out.Close()
// write image to hash for testing purposes
out := fnv.New64()
_ = png.Encode(out, dst)
fmt.Printf("Hash of compressed image: %x", out.Sum64())
// Output: Hash of compressed image: fa83a1b8d8abf5f2
}
开发者ID:infogulch,项目名称:fontutil,代码行数:27,代码来源:example_test.go
示例8: GetImage
func (ff *FontFace) GetImage(text string) (img draw.Image, err error) {
var (
src image.Image
bg image.Image
dst draw.Image
pt fixed.Point26_6
w int
h int
)
src = image.NewUniform(ff.fg)
bg = image.NewUniform(ff.bg)
w = int(float32(len(text)) * ff.charw)
h = int(ff.charh)
dst = image.NewRGBA(image.Rect(0, 0, w, h))
draw.Draw(dst, dst.Bounds(), bg, image.ZP, draw.Src)
ff.context.SetSrc(src)
ff.context.SetDst(dst)
ff.context.SetClip(dst.Bounds())
pt = freetype.Pt(0, int(ff.charh+ff.offy))
if pt, err = ff.context.DrawString(text, pt); err != nil {
return
}
img = image.NewRGBA(image.Rect(0, 0, int(pt.X/64), int(pt.Y/64)))
draw.Draw(img, img.Bounds(), dst, image.Pt(0, -int(ff.offy)), draw.Src)
return
}
开发者ID:kurrik,项目名称:opengl-benchmarks,代码行数:26,代码来源:fontface.go
示例9: DrawInfoBox
func (a *Annotator) DrawInfoBox() error {
tStart, tEnd := a.table.TimeStart, a.table.TimeEnd
// tDuration := humanize.RelTime(*tStart, *tEnd, "", "")
tPixel := (tEnd.Unix() - tStart.Unix()) / int64(a.table.Integrations)
fStart, fEnd := a.table.HzLow, a.table.HzHigh
fBandwidth := fEnd - fStart
fPixel := fBandwidth / float64(a.table.Bins)
perPixel := fmt.Sprintf("%s x %d seconds", a.humanHz(fPixel), tPixel)
// positioning
imgSize := a.table.Image().Bounds().Size()
top, left := imgSize.Y-75, 3
strings := []string{
"Scan start: " + tStart.String(),
"Scan end: " + tEnd.String(),
// "Scan duration: " + tDuration,
fmt.Sprintf("Band: %s to %s", a.humanHz(fStart), a.humanHz(fEnd)),
fmt.Sprintf("Bandwidth: %s", a.humanHz(fBandwidth)),
"1 pixel = " + perPixel,
}
// drawing
pt := freetype.Pt(left, top)
for _, s := range strings {
_, _ = a.context.DrawString(s, pt)
pt.Y += a.context.PointToFixed(size * spacing)
}
return nil
}
开发者ID:dhogborg,项目名称:rtl-gopow,代码行数:34,代码来源:annotater.go
示例10: GetText
func (ff *FontFace) GetText(text string) (t *Texture, err error) {
var (
src image.Image
bg image.Image
dst draw.Image
shortened draw.Image
pt fixed.Point26_6
w int
h int
)
src = image.NewUniform(ff.fg)
bg = image.NewUniform(ff.bg)
w = int(float32(len(text)) * ff.charw)
h = int(ff.charh)
dst = image.NewRGBA(image.Rect(0, 0, w, h))
draw.Draw(dst, dst.Bounds(), bg, image.ZP, draw.Src)
ff.context.SetSrc(src)
ff.context.SetDst(dst)
ff.context.SetClip(dst.Bounds())
pt = freetype.Pt(0, int(ff.charh))
if pt, err = ff.context.DrawString(text, pt); err != nil {
return
}
// if err = WritePNG("hello.png", dst); err != nil {
// return
// }
shortened = image.NewRGBA(image.Rect(0, 0, int(pt.X/64), h))
draw.Draw(shortened, shortened.Bounds(), dst, image.ZP, draw.Src)
t, err = GetTexture(shortened, gl.NEAREST)
return
}
开发者ID:pikkpoiss,项目名称:twodee,代码行数:31,代码来源:text.go
示例11: main
func main() {
fontBytes, err := ioutil.ReadFile("luxisr.ttf")
if err != nil {
log.Fatal(err)
}
font, err := freetype.ParseFont(fontBytes)
if err != nil {
log.Fatal(err)
}
fg, bg := image.White, image.Black
rgba := image.NewRGBA(image.Rect(0, 0, width, height))
draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
c := freetype.NewContext()
c.SetDPI(dpi)
c.SetFont(font)
c.SetFontSize(size)
c.SetClip(rgba.Bounds())
c.SetDst(rgba)
c.SetSrc(fg)
c.SetHinting(freetype.FullHinting)
count := 0
l := NewLife(width, height)
for {
if count%10 == 0 {
count = 0
pt := freetype.Pt(rand.Intn(width-width/4), height/4+rand.Intn(height-height/4))
c.DrawString("NOPE", pt)
for x := 0; x < width; x++ {
for y := 0; y < height; y++ {
c := rgba.RGBAAt(x, y)
l.a.Set(x, y, c.R > 0 || c.B > 0 || c.G > 0)
}
}
}
count++
for x := 0; x < width; x++ {
for y := 0; y < height; y++ {
var c color.Color = color.Black
if l.a.Alive(x, y) {
c = rainbow(y)
}
rgba.Set(x, y, c)
}
}
//fmt.Println(l)
sendImage(rgba)
l.Step()
time.Sleep(time.Second / 8)
}
}
开发者ID:nf,项目名称:nope,代码行数:55,代码来源:nope.go
示例12: findOffsetAtIndex
func (w *TextEditLine) findOffsetAtIndex(index int) float64 {
pt := freetype.Pt(0, 0)
if index > len(w.text) {
index = len(w.text)
}
if index < 0 {
index = 0
}
adv, _ := w.context.DrawString(w.text[:index], pt)
return float64(adv.X>>8) * w.scale
}
开发者ID:losinggeneration,项目名称:glop,代码行数:11,代码来源:text_edit_line.go
示例13: DrawYScale
func (a *Annotator) DrawYScale() error {
log.WithFields(log.Fields{
"timestart": a.table.TimeStart.String(),
"timeend": a.table.TimeEnd.String(),
}).Debug("annotate Y scale")
start, end := a.table.TimeStart, a.table.TimeEnd
// how many samples?
count := int(math.Floor(float64(a.table.Integrations) / float64(100)))
uStart := start.Unix()
uEnd := end.Unix()
secsPerLabel := int(math.Floor(float64(uEnd-uStart) / float64(count)))
pxPerLabel := int(math.Floor(float64(a.table.Integrations) / float64(count)))
log.WithFields(log.Fields{
"labels": count,
"secsPerLabel": secsPerLabel,
"pxPerLabel": pxPerLabel,
}).Debug("annotate Y scale")
for si := 0; si < count; si++ {
secs := time.Duration(secsPerLabel * si * int(time.Second))
px := si * pxPerLabel
var str string = ""
if si == 0 {
str = start.String()
} else {
point := start.Add(secs)
str = point.Format("15:04:05")
}
// draw a guideline on the exact time
for i := 0; i < 75; i++ {
a.image.Set(i, px, image.White)
}
// draw the text, 3 px margin to the line
pt := freetype.Pt(3, px-3)
_, _ = a.context.DrawString(str, pt)
}
return nil
}
开发者ID:dhogborg,项目名称:rtl-gopow,代码行数:52,代码来源:annotater.go
示例14: WriteText
// Write a text inside the image
func WriteText(text string, f *truetype.Font, img *image.Paletted) {
// Initialize the context.
fg := image.Black
c := freetype.NewContext()
c.SetDPI(72)
c.SetFont(f)
c.SetFontSize(64)
c.SetClip(img.Bounds())
c.SetDst(img)
c.SetSrc(fg)
// Draw the text.
pt := freetype.Pt(40, 120)
c.DrawString(text, pt)
}
开发者ID:maxzerbini,项目名称:packagemain,代码行数:15,代码来源:animatedgif.go
示例15: TextLen
func (ig *ImageGraphics) TextLen(s string, font chart.Font) int {
c := freetype.NewContext()
c.SetDPI(dpi)
c.SetFont(ig.font)
fontsize := ig.relFontsizeToPixel(font.Size)
c.SetFontSize(fontsize)
// really draw it
width, err := c.DrawString(s, freetype.Pt(0, 0))
if err != nil {
return 10 * len(s) // BUG
}
return int(width.X+32)>>6 + 1
}
开发者ID:RobinTec,项目名称:chart,代码行数:14,代码来源:image.go
示例16: annotate
func (a Annotator) annotate(upperText string, lowerText string) []byte {
fontColor, _ := colorful.Hex("#000000")
fontMask := image.NewUniform(fontColor)
templateFile, _ := ioutil.ReadFile("./static/template.jpg")
srcImage, _ := jpeg.Decode(bytes.NewBuffer(templateFile))
srcBounds := srcImage.Bounds()
srcHeight := srcBounds.Max.Y
imageMask := image.NewRGBA(srcBounds)
imageMaskClip := imageMask.Bounds()
draw.Draw(imageMask, imageMaskClip, srcImage, image.ZP, draw.Src)
c := freetype.NewContext()
c.SetFont(font)
c.SetFontSize(60)
c.SetDPI(60)
c.SetSrc(fontMask)
c.SetDst(imageMask)
c.SetClip(imageMaskClip)
drawLines := func(line string, point fixed.Point26_6) {
c.DrawString(line, point)
}
upperPoint := freetype.Pt(10, 40)
lowerPoint := freetype.Pt(10, srcHeight-10)
drawLines(upperText, upperPoint)
drawLines(lowerText, lowerPoint)
dataBuffer := bytes.NewBuffer([]byte(""))
jpeg.Encode(dataBuffer, imageMask, nil)
return dataBuffer.Bytes()
}
开发者ID:viniciusfeitosa,项目名称:philosoraptor,代码行数:36,代码来源:philosoraptor.go
示例17: main
func main() {
imgcounter := 123
imgfile, _ := os.Create(fmt.Sprintf("%03d.png", imgcounter))
defer imgfile.Close()
img := image.NewNRGBA(image.Rect(0, 0, dx, dy))
for y := 0; y < dy; y++ {
for x := 0; x < dx; x++ {
img.Set(x, y, color.RGBA{uint8(x), uint8(y), 0, 255})
}
}
fontBytes, err := ioutil.ReadFile(fontFile) //读取字体数据
if err != nil {
fmt.Println(err)
return
}
font, err := freetype.ParseFont(fontBytes)
if err != nil {
fmt.Print(err)
return
}
c := freetype.NewContext()
c.SetDPI(fontDPI)
c.SetFont(font)
c.SetFontSize(fontSize)
c.SetClip(img.Bounds())
c.SetDst(img)
c.SetSrc(image.White)
pt := freetype.Pt(10, 10+int(c.PointToFixed(fontSize)>>8)) // 字出现的位置
_, err = c.DrawString("ABCDE", pt)
if err != nil {
fmt.Println(err)
return
}
err = png.Encode(imgfile, img)
if err != nil {
fmt.Println(err)
}
}
开发者ID:madong-fun,项目名称:golang-study,代码行数:44,代码来源:imageSign.go
示例18: drawText
func drawText(font *truetype.Font, c *freetype.Context, color color.Color, rgba *image.RGBA, text string) (int, int) {
fg := image.NewUniform(color)
bg := image.Transparent
draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
c.SetFont(font)
c.SetDst(rgba)
c.SetSrc(fg)
c.SetClip(rgba.Bounds())
// height is the fraction of the font that is above the line, 1.0 would mean
// that the font never falls below the line
// TODO: wtf - this is all wrong!
// fix fonts - we can't change the font size easily
height := 1.3
pt := freetype.Pt(0, int(float64(c.PointToFixed(*size)>>8)*height))
adv, _ := c.DrawString(text, pt)
pt.X += adv.X
py := int(float64(pt.Y>>8)/height + 0.01)
return int(pt.X >> 8), py
}
开发者ID:losinggeneration,项目名称:glop,代码行数:19,代码来源:text_line.go
示例19: getMaxHeight
func (t *Text) getMaxHeight() int {
w, h := t.GetStringSize("|")
bounds := image.Rect(0, 0, int(w>>6), int(h>>6))
img := image.NewRGBA(bounds)
ctx := freetype.NewContext()
ctx.SetFont(t.font)
ctx.SetFontSize(t.fontSize)
ctx.SetSrc(&image.Uniform{t.fillColor})
ctx.SetDst(img)
ctx.SetClip(bounds)
ctx.DrawString("|", freetype.Pt(0, int(t.fontSize)))
var i = len(img.Pix) - 1
for ; img.Pix[i] == 0; i-- {
}
return (i / img.Stride) + 1
}
开发者ID:stephenwithav,项目名称:ssvgc,代码行数:20,代码来源:text.go
示例20: mark
func (this *Signer) mark(text string) (image.Image, error) {
fontBytes, err := ioutil.ReadFile(this.fontPath)
if err != nil {
fmt.Println(err)
}
font, err := freetype.ParseFont(fontBytes)
if err != nil {
fmt.Println(err)
}
//读取图片
file, err := os.Open(this.srcImage)
if err != nil {
fmt.Println(err)
}
defer file.Close()
img, err := jpeg.Decode(file)
if err != nil {
fmt.Println(err)
}
bounds := img.Bounds()
nrgba := image.NewNRGBA(bounds)
draw.Draw(nrgba, img.Bounds(), img, image.ZP, draw.Over)
c := freetype.NewContext()
c.SetDPI(this.dpi)
c.SetFont(font)
c.SetDst(nrgba)
c.SetFontSize(this.fontSize)
c.SetClip(nrgba.Bounds())
c.SetSrc(image.White)
pt := freetype.Pt(100, 100+int(c.PointToFixed(this.fontSize)>>8))
for _, s := range strings.Split(text, "\r\n") {
_, err = c.DrawString(s, pt)
pt.Y += c.PointToFixed(12 * 1.5)
}
return nrgba, nil
}
开发者ID:madong-fun,项目名称:golang-study,代码行数:41,代码来源:markImage.go
注:本文中的github.com/golang/freetype.Pt函数示例整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。 |
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