mirror of
https://github.com/OpenDiablo2/OpenDiablo2
synced 2024-09-10 13:34:36 -04:00
193 lines
4.5 KiB
Go
193 lines
4.5 KiB
Go
package d2asset
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import (
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"errors"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2enum"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2util"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2fileformats/d2dc6"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2fileformats/d2dcc"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
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)
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var _ d2interface.Animation = &DC6Animation{} // Static check to confirm struct conforms to
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// interface
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func newDC6Animation(
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dc6 *d2dc6.DC6,
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pal d2interface.Palette,
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effect d2enum.DrawEffect,
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) (d2interface.Animation, error) {
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DC6 := &DC6Animation{
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dc6: dc6,
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palette: pal,
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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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originAtBottom: true,
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effect: effect,
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onBindRenderer: func(r d2interface.Renderer) error {
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if DC6.renderer != r {
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DC6.renderer = r
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return DC6.createSurfaces()
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}
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return nil
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},
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}
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DC6.Animation = *anim
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err := DC6.init()
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if err != nil {
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return nil, err
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}
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return DC6, nil
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}
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// DC6Animation is an animation made from a DC6 file
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type DC6Animation struct {
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Animation
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dc6 *d2dc6.DC6
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palette d2interface.Palette
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}
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func (a *DC6Animation) init() error {
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a.directions = make([]animationDirection, a.dc6.Directions)
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for directionIndex := range a.directions {
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a.directions[directionIndex].frames = make([]animationFrame, a.dc6.FramesPerDirection)
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}
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err := a.decode()
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return err
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}
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// SetDirection decodes and sets the direction
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func (a *DC6Animation) 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[directionIndex].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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return nil
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}
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func (a *DC6Animation) decode() error {
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for directionIndex := 0; directionIndex < len(a.directions); directionIndex++ {
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err := a.decodeDirection(directionIndex)
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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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return nil
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}
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func (a *DC6Animation) decodeDirection(directionIndex int) error {
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for frameIndex := 0; frameIndex < int(a.dc6.FramesPerDirection); frameIndex++ {
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frame := a.decodeFrame(directionIndex, frameIndex)
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a.directions[directionIndex].frames[frameIndex] = frame
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}
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a.directions[directionIndex].decoded = true
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return nil
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}
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func (a *DC6Animation) decodeFrame(directionIndex, frameIndex int) animationFrame {
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startFrame := directionIndex * int(a.dc6.FramesPerDirection)
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dc6Frame := a.dc6.Frames[startFrame+frameIndex]
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frame := animationFrame{
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width: int(dc6Frame.Width),
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height: int(dc6Frame.Height),
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offsetX: int(dc6Frame.OffsetX),
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offsetY: int(dc6Frame.OffsetY),
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}
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a.directions[directionIndex].frames[frameIndex].decoded = true
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return frame
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}
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func (a *DC6Animation) createSurfaces() error {
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for directionIndex := 0; directionIndex < len(a.directions); directionIndex++ {
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err := a.createDirectionSurfaces(directionIndex)
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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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return nil
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}
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func (a *DC6Animation) createDirectionSurfaces(directionIndex int) error {
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for frameIndex := 0; frameIndex < int(a.dc6.FramesPerDirection); frameIndex++ {
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if !a.directions[directionIndex].decoded {
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err := a.decodeDirection(directionIndex)
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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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surface, err := a.createFrameSurface(directionIndex, frameIndex)
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if err != nil {
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return err
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}
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a.directions[directionIndex].frames[frameIndex].image = surface
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}
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return nil
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}
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func (a *DC6Animation) createFrameSurface(directionIndex, frameIndex int) (d2interface.Surface, error) {
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if !a.directions[directionIndex].frames[frameIndex].decoded {
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frame := a.decodeFrame(directionIndex, frameIndex)
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a.directions[directionIndex].frames[frameIndex] = frame
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}
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startFrame := directionIndex * int(a.dc6.FramesPerDirection)
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dc6Frame := a.dc6.Frames[startFrame+frameIndex]
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indexData := a.dc6.DecodeFrame(startFrame + frameIndex)
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colorData := d2util.ImgIndexToRGBA(indexData, a.palette)
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if a.renderer == nil {
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return nil, errors.New("no renderer")
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}
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sfc := a.renderer.NewSurface(int(dc6Frame.Width), int(dc6Frame.Height))
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sfc.ReplacePixels(colorData)
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return sfc, nil
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}
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// Clone creates a copy of the animation
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func (a *DC6Animation) Clone() d2interface.Animation {
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clone := &DC6Animation{}
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clone.Animation = *a.Animation.Clone().(*Animation)
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clone.dc6 = a.dc6.Clone()
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clone.palette = a.palette
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return clone
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}
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