func (l *TextInstanceList) repackImage() (err error) {
var (
newImage *sprites.PackedSheet
instance *render.Instance
sprite *sprites.Sprite
)
if glog.V(1) {
glog.Info("Repacking image")
}
newImage = sprites.NewPackedSheet(
l.sheet.Width,
l.sheet.Height,
)
instance = l.Head()
for instance != nil {
if err = newImage.Copy(instance.Key, l.sheet); err != nil {
return
}
if sprite, err = newImage.Sheet.Sprite(instance.Key); err != nil {
return
}
instance.Frame = sprite.Index()
instance.MarkChanged()
instance = instance.Next()
}
l.sheet = newImage
if err = l.generateTexture(); err != nil {
return
}
if glog.V(1) {
glog.Info("Done repacking")
}
return
}
func (l *TextInstanceList) SetText(instance *render.Instance, text string, font *FontFace) (err error) {
var (
img draw.Image
sprite *sprites.Sprite
)
if instance == nil {
return // No error.
}
if img, err = font.GetImage(text); err != nil {
return
}
if err = l.sheet.Pack(text, img); err != nil {
// Attempt to compact the texture.
if err = l.repackImage(); err != nil {
return
}
if err = l.sheet.Pack(text, img); err != nil {
return
}
}
if sprite, err = l.sheet.Sprite(text); err != nil {
return
}
instance.Frame = sprite.Index()
instance.SetScale(sprite.WorldDimensions(l.cfg.PixelsPerUnit).Vec3(1.0))
instance.MarkChanged()
instance.Key = text
if err = l.generateTexture(); err != nil {
return
}
return
}
func (m *TextMapping) Set(r rune, key string) (err error) {
var (
sprite *sprites.Sprite
)
if sprite, err = m.sheet.Sprite(key); err != nil {
return
}
m.mapping[r] = sprite.Index()
return
}
func NewTextMapping(sheet *sprites.Sheet, defaultSprite string) (out *TextMapping, err error) {
var (
sprite *sprites.Sprite
)
out = &TextMapping{
sheet: sheet,
mapping: map[rune]int{},
}
if sprite, err = sheet.Sprite(defaultSprite); err != nil {
return
}
out.defaultSprite = sprite.Index()
return
}