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 (l *SpriteInstanceList) SetFrame(instance *render.Instance, frame string) (err error) {
var s *Sprite
if instance == nil {
return // No error
}
if s, err = l.sheet.Sprite(frame); err != nil {
return
}
instance.Frame = s.Index()
instance.SetScale(s.WorldDimensions(l.pixelsPerUnit).Vec3(1.0))
instance.MarkChanged()
instance.Key = frame
return
}