func (this *TextRenderer) Update(delta float32) {
if len(this.runeImgs) == 0 {
return
}
// Model := mathgl.Ident4()
// Model = this.GetParent().transform.GetUpdatedModel()
fInfo := truetype.Font(*Font.GetFont(this.font))
curTotWidth = float32(0.0)
for idx, img := range this.runeImgs {
i := fInfo.Index(rune(this.text[idx]))
hmetric := fInfo.HMetric(100, i)
w := float32(hmetric.AdvanceWidth) //float32(img.Bounds().Dx())
this.Render(img)
curTotWidth += w
}
}
//GetSectionMap
//Returns section mapping for each letter in ttf in form of image.Rect with y=0
func (this FontInfo) GetSectionMap() map[rune]image.Rectangle {
f := truetype.Font(this)
secMap := map[rune]image.Rectangle{}
curW := 0
curH := 0
// fmt.Println("Font: ", this.Name())
for idx, v := range text {
if idx > 0 && int(math.Mod(float64(idx), float64(itemsPerRow))) == 0 {
curH += int(f.Bounds(sizeFixed).Max.Sub(f.Bounds(sizeFixed).Min).Y) + insetPadding
curW = 0
}
i := f.Index(v)
hmet := f.HMetric(sizeFixed, i)
// vmet := f.VMetric(sizeFixed, i)
// advance width is how much font advances on x which next font starts AFTER that.
minX := curW //+ 1
minY := curH //+ 1
maxX := curW + int(hmet.AdvanceWidth)
maxY := curH + int(f.Bounds(sizeFixed).Max.Sub(f.Bounds(sizeFixed).Min).Y)
curW += int(hmet.AdvanceWidth) + insetPadding
secMap[v] = image.Rect(minX, minY, maxX, maxY)
// fmt.Println("Letter: ", string(v))
// fmt.Println("Bounds: ", secMap[v])
}
return secMap
}
// returns official font name: eg. "Times New Roman Normal""
func (this FontInfo) Name() string {
f := truetype.Font(this)
return f.Name(truetype.NameIDFontFullName)
}
// returns image of rendered font
func (this FontInfo) GetImage() image.Image {
f := truetype.Font(this)
maxWidth := 0
curW := 0
maxHeight := int(f.Bounds(sizeFixed).Max.Sub(f.Bounds(sizeFixed).Min).Y) + insetPadding
for idx, val := range text {
if idx > 0 && int(math.Mod(float64(idx), float64(itemsPerRow))) == 0 {
maxHeight += int(f.Bounds(sizeFixed).Max.Sub(f.Bounds(sizeFixed).Min).Y) + insetPadding
curW = 0
}
i := f.Index(val)
hmet := f.HMetric(sizeFixed, i)
curW += int(hmet.AdvanceWidth) + insetPadding
if curW > maxWidth {
maxWidth = curW
}
}
Logging.Debug("Font ", this.Name())
Logging.Debug("Max width: ", maxWidth)
Logging.Debug("Max height: ", maxHeight)
// Draw the background and the guidelines.
fg, bg := image.Black, image.Transparent
// diffY := int(f.Bounds(sizeFixed).Max.Sub(f.Bounds(sizeFixed).Min).Y)
// add a constant to the y term because of subtle bleeding between vertical space, probably because of advance height
rgba := image.NewRGBA(image.Rect(0, 0, maxWidth, maxHeight)) //diffY+5))
draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
// Draw the text.
h := font.HintingNone
switch hinting {
case "full":
h = font.HintingFull
}
d := &font.Drawer{
Dst: rgba,
Src: fg,
Face: truetype.NewFace(&f, &truetype.Options{
Size: size,
DPI: dpi,
Hinting: h,
}),
}
// y := int(math.Abs(float64(f.Bounds(sizeFixed).Max.Y))) //10 + int(math.Ceil(*size**dpi/72))
// dy := int(math.Ceil(size * spacing * dpi / 72))
tWidth := 0
tHeight := int(math.Abs(float64(f.Bounds(sizeFixed).Max.Y)))
for idx, r := range text {
if idx > 0 && int(math.Mod(float64(idx), float64(itemsPerRow))) == 0 {
tHeight += int(f.Bounds(sizeFixed).Max.Sub(f.Bounds(sizeFixed).Min).Y) + insetPadding
tWidth = 0
}
i := f.Index(r)
hmet := f.HMetric(sizeFixed, i)
d.Dot = fixed.P(tWidth, tHeight)
tWidth += int(hmet.AdvanceWidth) + insetPadding
d.DrawString(string(r))
}
return rgba
}
