126 lines
2.9 KiB
Go
126 lines
2.9 KiB
Go
package d2asset
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import (
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"errors"
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"math"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2enum"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2math"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2fileformats/d2dcc"
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d2iface "github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
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)
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var _ d2iface.Animation = &DCCAnimation{} // Static check to confirm struct conforms to interface
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// DCCAnimation represents an animation decoded from DCC
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type DCCAnimation struct {
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animation
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dccPath string
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palette d2iface.Palette
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renderer d2iface.Renderer
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}
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// CreateDCCAnimation creates an animation from d2dcc.DCC and d2dat.DATPalette
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func CreateDCCAnimation(renderer d2iface.Renderer, dccPath string, palette d2iface.Palette,
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effect d2enum.DrawEffect) (d2iface.Animation, error) {
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dcc, err := loadDCC(dccPath)
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if err != nil {
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return nil, err
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}
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anim := animation{
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playLength: defaultPlayLength,
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playLoop: true,
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directions: make([]animationDirection, dcc.NumberOfDirections),
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effect: effect,
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}
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DCC := DCCAnimation{
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animation: anim,
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dccPath: dccPath,
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palette: palette,
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renderer: renderer,
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}
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err = DCC.SetDirection(0)
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if err != nil {
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return nil, err
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}
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return &DCC, nil
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}
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// Clone creates a copy of the animation
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func (a *DCCAnimation) Clone() d2iface.Animation {
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animation := *a
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return &animation
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}
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// SetDirection places the animation in the direction of an animation
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func (a *DCCAnimation) SetDirection(directionIndex int) error {
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const smallestInvalidDirectionIndex = 64
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if directionIndex >= smallestInvalidDirectionIndex {
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return errors.New("invalid direction index")
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}
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direction := d2dcc.Dir64ToDcc(directionIndex, len(a.directions))
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if !a.directions[direction].decoded {
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err := a.decodeDirection(direction)
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if err != nil {
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return err
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}
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}
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a.directionIndex = direction
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a.frameIndex = 0
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return nil
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}
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func (a *DCCAnimation) decodeDirection(directionIndex int) error {
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dcc, err := loadDCC(a.dccPath)
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if err != nil {
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return err
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}
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direction := dcc.DecodeDirection(directionIndex)
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minX, minY := math.MaxInt32, math.MaxInt32
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maxX, maxY := math.MinInt32, math.MinInt32
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for _, dccFrame := range direction.Frames {
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minX = d2math.MinInt(minX, dccFrame.Box.Left)
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minY = d2math.MinInt(minY, dccFrame.Box.Top)
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maxX = d2math.MaxInt(maxX, dccFrame.Box.Right())
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maxY = d2math.MaxInt(maxY, dccFrame.Box.Bottom())
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}
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frameWidth := maxX - minX
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frameHeight := maxY - minY
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for _, dccFrame := range direction.Frames {
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pixels := ImgIndexToRGBA(dccFrame.PixelData, a.palette)
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sfc, err := a.renderer.NewSurface(frameWidth, frameHeight, d2enum.FilterNearest)
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if err != nil {
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return err
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}
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if err := sfc.ReplacePixels(pixels); err != nil {
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return err
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}
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a.directions[directionIndex].decoded = true
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a.directions[directionIndex].frames = append(a.directions[directionIndex].frames, &animationFrame{
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width: frameWidth,
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height: frameHeight,
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offsetX: minX,
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offsetY: minY,
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image: sfc,
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})
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}
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return nil
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}
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