Only draw shadows for layers that should have them (#704)

* Don't draw shadows for transparent layers

* Also use cof shadow setting

d2common/d2enum/draw_effect.go

@@ -40,3 +40,11 @@ const (
 	// no effect
 	DrawEffectNone
 )
+
+func (d DrawEffect) Transparent() bool {
+	if d == DrawEffectNone {
+		return false
+	}
+
+	return true
+}

d2common/d2interface/animation.go

@@ -38,4 +38,5 @@ type Animation interface {
 	GetPlayedCount() int
 	ResetPlayedCount()
 	SetEffect(effect d2enum.DrawEffect)
+	SetShadow(shadow bool)
 }

d2core/d2asset/animation.go

@@ -54,6 +54,7 @@ type animation struct {
 	originAtBottom   bool
 	playLoop         bool
 	hasSubLoop       bool // runs after first animation ends
+	hasShadow        bool
 }
 
 // SetSubLoop sets a sub loop for the animation
@@ -158,7 +159,7 @@ func (a *animation) RenderFromOrigin(target d2iface.Surface, shadow bool) error
 		defer target.Pop()
 	}
 
-	if shadow {
+	if shadow && !a.effect.Transparent() && a.hasShadow {
 		_, height := a.GetFrameBounds()
 		height = int(math.Abs(float64(height)))
 
@@ -338,3 +339,7 @@ func (a *animation) ResetPlayedCount() {
 func (a *animation) SetEffect(e d2enum.DrawEffect) {
 	a.effect = e
 }
+
+func (a *animation) SetShadow(shadow bool) {
+	a.hasShadow = shadow
+}

d2core/d2asset/composite.go

@@ -275,6 +275,7 @@ func (c *Composite) createMode(animationMode animationMode, weaponClass string)
 		if err == nil {
 			layer.SetPlaySpeed(mode.animationSpeed)
 			layer.PlayForward()
+			layer.SetShadow(cofLayer.Shadow != 0)
 
 			if err := layer.SetDirection(c.direction); err != nil {
 				return nil, err