func loadImage(name string) *sdl.Surface {
image := sdl.Load(name)
if image == nil {
panic(sdl.GetError())
}
return image
}
// Load a file as sprite set. elemWidth/elemHeight are the size of each
// element in the sprite set
func NewSpriteSet(file string, elemWidth uint, elemHeight uint) *SpriteSet {
surface := sdl.Load(file)
if surface == nil {
log.Fatal("[SpriteSet] NewSpriteSet(): unable to load resource")
}
nbElemWidth := int(surface.W) / int(elemWidth)
nbElemHeight := int(surface.H) / int(elemHeight)
nbElem := nbElemWidth * nbElemHeight
elemList := make([]Vector2d, nbElem)
var x, y int = 0, 0
for i := 0; i < nbElem; i++ {
elemList[i] = Vector2d{x * int(elemWidth), y * int(elemHeight)}
x = (x + 1) % nbElemWidth
if x == 0 {
y++
}
}
return &SpriteSet{surface, elemWidth, elemHeight, elemList}
}
func (this *SpriteLoader) loadAnims() {
for _, anim := range this.data.Anims {
if anim.Name == "" {
log.Fatal("[SpriteLoader] gspr: 'anim' must contain",
" a 'name'")
}
if anim.Frequency == 0 {
log.Fatal("[SpriteLoader] gspr: 'anim' must contain",
" a 'frequency'")
}
newAnim := NewAnim(anim.Name, anim.Frequency)
for _, image := range anim.Images {
if image.Path == "" && image.Tileset == "" {
log.Fatal("[SpriteLoader] gspr: 'anim>image' must contain",
" a 'path' or a 'tileset'")
}
if image.Path != "" && image.Tileset != "" {
log.Fatal("[SpriteLoader] gspr: 'anim>image' must not contain",
" either 'path' or 'tileset'")
}
if image.Tileset != "" {
newAnim.AddSprite(image.Tileset, image.Sprite_num)
} else {
sprite := sdl.Load(image.Path)
imageName := strconv.Itoa(int(this.singleImageCount))
this.mapSprite[imageName] = NewSpriteSet(
image.Path,
uint(sprite.W),
uint(sprite.H),
)
sprite.Free()
newAnim.AddSprite(imageName, 0)
this.singleImageCount++
}
}
this.animMap[anim.Name] = newAnim
}
}