package d2asset import ( "errors" "github.com/OpenDiablo2/OpenDiablo2/d2common/d2enum" "github.com/OpenDiablo2/OpenDiablo2/d2common/d2fileformats/d2dcc" d2iface "github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface" ) // DC6Animation is an animation made from a DC6 file type DC6Animation struct { animation dc6Path string palette d2iface.Palette renderer d2iface.Renderer } // CreateDC6Animation creates an Animation from d2dc6.DC6 and d2dat.DATPalette func CreateDC6Animation(renderer d2iface.Renderer, dc6Path string, palette d2iface.Palette, effect d2enum.DrawEffect) (d2iface.Animation, error) { dc6, err := loadDC6(dc6Path) if err != nil { return nil, err } animation := animation{ directions: make([]animationDirection, dc6.Directions), playLength: defaultPlayLength, playLoop: true, originAtBottom: true, effect: effect, } anim := DC6Animation{ animation: animation, dc6Path: dc6Path, palette: palette, renderer: renderer, } err = anim.SetDirection(0) return &anim, err } // SetDirection decodes and sets the direction func (a *DC6Animation) SetDirection(directionIndex int) error { const smallestInvalidDirectionIndex = 64 if directionIndex >= smallestInvalidDirectionIndex { return errors.New("invalid direction index") } direction := d2dcc.Dir64ToDcc(directionIndex, len(a.directions)) if !a.directions[direction].decoded { err := a.decodeDirection(direction) if err != nil { return err } } a.directionIndex = direction a.frameIndex = 0 return nil } func (a *DC6Animation) decodeDirection(directionIndex int) error { dc6, err := loadDC6(a.dc6Path) if err != nil { return err } startFrame := directionIndex * int(dc6.FramesPerDirection) for i := 0; i < int(dc6.FramesPerDirection); i++ { dc6Frame := dc6.Frames[startFrame+i] sfc, err := a.renderer.NewSurface(int(dc6Frame.Width), int(dc6Frame.Height), d2enum.FilterNearest) if err != nil { return err } indexData := dc6.DecodeFrame(startFrame + i) colorData := ImgIndexToRGBA(indexData, a.palette) if err := sfc.ReplacePixels(colorData); err != nil { return err } a.directions[directionIndex].decoded = true a.directions[directionIndex].frames = append(a.directions[directionIndex].frames, &animationFrame{ width: int(dc6Frame.Width), height: int(dc6Frame.Height), offsetX: int(dc6Frame.OffsetX), offsetY: int(dc6Frame.OffsetY), image: sfc, }) } return nil } // Clone creates a copy of the animation func (a *DC6Animation) Clone() d2iface.Animation { animation := *a return &animation }