File indexing completed on 2025-04-27 04:01:14

 import math
 from ... import objects
 from ...objects import easing
 from . import api, ast
 from ... import NVector, PolarVector
 
 try:
     from ...utils import font
     has_font = True
 except ImportError:
     has_font = False
 
 
 def convert(canvas: api.Canvas):
     return Converter().convert(canvas)
 
 
 class Converter:
     def __init__(self):
         pass
 
     def _animated(self, sifval):
         return isinstance(sifval, ast.SifAnimated)
 
     def convert(self, canvas: api.Canvas):
         self.canvas = canvas
         self.animation = objects.Animation(
             self._time(canvas.end_time),
             canvas.fps
         )
         self.animation.in_point = self._time(canvas.begin_time)
         self.animation.width = canvas.width
         self.animation.height = canvas.height
         self.view_p1 = NVector(canvas.view_box[0], canvas.view_box[1])
         self.view_p2 = NVector(canvas.view_box[2], canvas.view_box[3])
         self.target_size = NVector(canvas.width, canvas.height)
         self.shape_layer = self.animation.add_layer(objects.ShapeLayer())
         self.gamma = NVector(canvas.gamma_r, canvas.gamma_g, canvas.gamma_b)
         self._process_layers(canvas.layers, self.shape_layer)
         return self.animation
 
     def _time(self, t: api.FrameTime):
         return self.canvas.time_to_frames(t)
 
     def _process_layers(self, layers, parent):
         old_gamma = self.gamma
 
         for layer in reversed(layers):
             if not layer.active:
                 continue
             elif isinstance(layer, api.GroupLayerBase):
                 parent.add_shape(self._convert_group(layer))
             elif isinstance(layer, api.RectangleLayer):
                 parent.add_shape(self._convert_fill(layer, self._convert_rect))
             elif isinstance(layer, api.CircleLayer):
                 parent.add_shape(self._convert_fill(layer, self._convert_circle))
             elif isinstance(layer, api.StarLayer):
                 parent.add_shape(self._convert_fill(layer, self._convert_star))
             elif isinstance(layer, api.PolygonLayer):
                 parent.add_shape(self._convert_fill(layer, self._convert_polygon))
             elif isinstance(layer, api.RegionLayer):
                 parent.add_shape(self._convert_fill(layer, self._convert_bline))
             elif isinstance(layer, api.AbstractOutline):
                 parent.add_shape(self._convert_outline(layer, self._convert_bline))
             elif isinstance(layer, api.GradientLayer):
                 parent.add_shape(self._convert_gradient(layer, parent))
             elif isinstance(layer, api.TransformDown):
                 shape = self._convert_transform_down(layer)
                 parent.add_shape(shape)
                 parent = shape
             elif isinstance(layer, api.TextLayer):
                 if has_font:
                     parent.add_shape(self._convert_fill(layer, self._convert_text))
             elif isinstance(layer, api.ColorCorrectLayer):
                 self.gamma = self.gamma * NVector(layer.gamma.value, layer.gamma.value, layer.gamma.value)
 
         self.gamma = old_gamma
 
     def _convert_group(self, layer: api.GroupLayer):
         shape = objects.Group()
         self._set_name(shape, layer)
         shape.transform.anchor_point = self._adjust_coords(self._convert_vector(layer.origin))
         self._convert_transform(layer.transformation, shape.transform)
         self._process_layers(layer.layers, shape)
         shape.transform.opacity = self._adjust_animated(
             self._convert_scalar(layer.amount),
             lambda x: x*100
         )
         return shape
 
     def _convert_transform(self, sif_transform: api.AbstractTransform, lottie_transform: objects.Transform):
         if isinstance(sif_transform, api.BoneLinkTransform):
             base_transform = sif_transform.base_value
         else:
             base_transform = sif_transform
 
         position = self._adjust_coords(self._convert_vector(base_transform.offset))
         rotation = self._adjust_angle(self._convert_scalar(base_transform.angle))
         scale = self._adjust_animated(
             self._convert_vector(base_transform.scale),
             lambda x: x * 100
         )
 
         lottie_transform.skew_axis = self._adjust_angle(self._convert_scalar(base_transform.skew_angle))
 
         if isinstance(sif_transform, api.BoneLinkTransform):
             lottie_transform.position = position
             lottie_transform.rotation = rotation
             lottie_transform.scale = scale
             #bone = sif_transform.bone
             #b_pos = self._adjust_coords(self._convert_vector(bone.origin))
             #old_anchor = lottie_transform.anchor_point
 
             #if sif_transform.translate:
                 #self._mix_animations_into(
                     #[position, b_pos, old_anchor],
                     #lottie_transform.position,
                     #lambda base_p, bone_p, anchor: (anchor-self.target_size/2)/2+self.target_size/2
                 #)
             #else:
                 #lottie_transform.position = position
 
             #lottie_transform.anchor_point = b_pos
             #lottie_transform.anchor_point.value += NVector(100,0)
 
             #if sif_transform.rotate:
                 #b_rot = self._convert_scalar(bone.angle)
                 #self._mix_animations_into([rotation, b_rot], lottie_transform.rotation, lambda a, b: a-b)
             #else:
                 #lottie_transform.rotation = rotation
 
             #if sif_transform.scale_y:
                 #b_scale = self._convert_scalar(bone.scalelx)
                 #self._mix_animations_into(
                     #scale, b_scale, lottie_transform.scale,
                     #lambda a, b: NVector(a.x, a.y * b)
                 #)
             #else:
                 #lottie_transform.scale = scale
         else:
             lottie_transform.position = position
             lottie_transform.rotation = rotation
             lottie_transform.scale = scale
 
     def _mix_animations_into(self, animations, output, mix):
         if not any(x.animated for x in animations):
             output.value = mix(*(x.value for x in animations))
         else:
             for vals in self._mix_animations(*animations):
                 time = vals.pop(0)
                 output.add_keyframe(time, mix(*vals))
 
     def _convert_fill(self, layer, converter):
         shape = objects.Group()
         self._set_name(shape, layer)
         shape.add_shape(converter(layer))
         if layer.invert.value:
             shape.add_shape(objects.Rect(self.target_size/2, self.target_size))
 
         fill = objects.Fill()
         fill.color = self._convert_color(layer.color)
         fill.opacity = self._adjust_animated(
             self._convert_scalar(layer.amount),
             lambda x: x * 100
         )
         shape.add_shape(fill)
         return shape
 
     def _convert_linecap(self, lc: api.LineCap):
         if lc == api.LineCap.Rounded:
             return objects.LineCap.Round
         if lc == api.LineCap.Squared:
             return objects.LineCap.Square
         return objects.LineCap.Butt
 
     def _convert_cusp(self, lc: api.CuspStyle):
         if lc == api.CuspStyle.Miter:
             return objects.LineJoin.Miter
         if lc == api.CuspStyle.Bevel:
             return objects.LineJoin.Bevel
         return objects.LineJoin.Round
 
     def _convert_outline(self, layer: api.AbstractOutline, converter):
         shape = objects.Group()
         self._set_name(shape, layer)
         shape.add_shape(converter(layer))
         stroke = objects.Stroke()
         stroke.color = self._convert_color(layer.color)
         stroke.line_cap = self._convert_linecap(layer.start_tip)
         stroke.line_join = self._convert_cusp(layer.cusp_type)
         stroke.width = self._adjust_scalar(self._convert_scalar(layer.width))
         shape.add_shape(stroke)
         return shape
 
     def _convert_rect(self, layer: api.RectangleLayer):
         rect = objects.Rect()
         p1 = self._adjust_coords(self._convert_vector(layer.point1))
         p2 = self._adjust_coords(self._convert_vector(layer.point2))
         if p1.animated or p2.animated:
             for time, p1v, p2v in self._mix_animations(p1, p2):
                 rect.position.add_keyframe(time, (p1v + p2v) / 2)
                 rect.size.add_keyframe(time, abs(p2v - p1v))
             pass
         else:
             rect.position.value = (p1.value + p2.value) / 2
             rect.size.value = abs(p2.value - p1.value)
         rect.rounded = self._adjust_scalar(self._convert_scalar(layer.bevel))
         return rect
 
     def _convert_circle(self, layer: api.CircleLayer):
         shape = objects.Ellipse()
         shape.position = self._adjust_coords(self._convert_vector(layer.origin))
         radius = self._adjust_scalar(self._convert_scalar(layer.radius))
         shape.size = self._adjust_add_dimension(radius, lambda x: NVector(x, x) * 2)
         return shape
 
     def _convert_star(self, layer: api.StarLayer):
         shape = objects.Star()
         shape.position = self._adjust_coords(self._convert_vector(layer.origin))
         shape.inner_radius = self._adjust_scalar(self._convert_scalar(layer.radius2))
         shape.outer_radius = self._adjust_scalar(self._convert_scalar(layer.radius1))
         shape.rotation = self._adjust_animated(
             self._convert_scalar(layer.angle),
             lambda x: 90-x
         )
         shape.points = self._convert_scalar(layer.points)
         if layer.regular_polygon.value:
             shape.star_type = objects.StarType.Polygon
         return shape
 
     def _mix_animations(self, *animatable):
         times = set()
         for v in animatable:
             self._force_animated(v)
             for kf in v.keyframes:
                 times.add(kf.time)
 
         for time in sorted(times):
             yield [time] + [v.get_value(time) for v in animatable]
 
     def _force_animated(self, lottieval):
         if not lottieval.animated:
             v = lottieval.value
             lottieval.add_keyframe(0, v)
             lottieval.add_keyframe(self.animation.out_point, v)
 
     def _convert_easing_part(self, interp: api.Interpolation):
         if interp == api.Interpolation.Linear:
             return easing.Linear()
         return easing.Sigmoid()
 
     def _convert_easing(self, start: api.Interpolation, end: api.Interpolation):
         if api.Interpolation.Constant in (start, end):
             return easing.Jump()
         if start == end:
             return self._convert_easing_part(start)
         return easing.Split(self._convert_easing_part(start), self._convert_easing_part(end))
 
     def _convert_animatable(self, v: ast.SifAstNode, lot: objects.properties.AnimatableMixin):
         if self._animated(v):
             if len(v.keyframes) == 1:
                 lot.value = self._convert_ast_value(v.keyframes[0].value)
             else:
                 for i, kf in enumerate(v.keyframes):
                     if i+1 < len(v.keyframes):
                         start = kf.after
                         end = v.keyframes[i+1].before
                         ease = self._convert_easing(start, end)
                     else:
                         ease = easing.Linear()
 
                     lot.add_keyframe(self._time(kf.time), self._convert_ast_value(kf.value), ease)
         else:
             lot.value = self._convert_ast_value(v)
         return lot
 
     def _convert_ast_value(self, v):
         if isinstance(v, ast.SifRadialComposite):
             return self._polar(v.radius.value, v.theta.value, 1)
         elif isinstance(v, ast.SifValue):
             return v.value
         elif isinstance(v, ast.SifVectorComposite):
             return NVector(v.x.value, v.y.value)
         else:
             return v
 
     def _converted_vector_values(self, v):
         if isinstance(v, ast.SifRadialComposite):
             return [self._convert_scalar(v.radius), self._convert_scalar(v.theta)]
         return self._convert_vector(v)
 
     def _convert_color(self, v: ast.SifAstNode):
         return self._adjust_animated(
             self._convert_animatable(v, objects.ColorValue()),
             self._color_gamma
         )
 
     def _convert_vector(self, v: ast.SifAstNode):
         return self._convert_animatable(v, objects.MultiDimensional())
 
     def _convert_scalar(self, v: ast.SifAstNode):
         return self._convert_animatable(v, objects.Value())
 
     def _color_gamma(self, color):
         color = color.clone()
         for i in range(3):
             color[i] = color[i] ** (1/self.gamma[i])
         return color
 
     def _adjust_animated(self, lottieval, transform):
         if lottieval.animated:
             for kf in lottieval.keyframes:
                 if kf.start is not None:
                     kf.start = transform(kf.start)
                 if kf.end is not None:
                     kf.end = transform(kf.end)
         else:
             lottieval.value = transform(lottieval.value)
         return lottieval
 
     def _adjust_scalar(self, lottieval: objects.Value):
         return self._adjust_animated(lottieval, self._scalar_mult)
 
     def _adjust_angle(self, lottieval: objects.Value):
         return self._adjust_animated(lottieval, lambda x: -x)
 
     def _adjust_add_dimension(self, lottieval, transform):
         to_val = objects.MultiDimensional()
         to_val.animated = lottieval.animated
         if lottieval.animated:
             to_val.keyframes = []
             for kf in lottieval.keyframes:
                 if kf.start is not None:
                     kf.start = transform(kf.start[0])
                 if kf.end is not None:
                     kf.end = transform(kf.end[0])
                 to_val.keyframes.append(kf)
         else:
             to_val.value = transform(lottieval.value)
         return to_val
 
     def _scalar_mult(self, x):
         return x * 60
 
     def _adjust_coords(self, lottieval: objects.MultiDimensional):
         return self._adjust_animated(lottieval, self._coord)
 
     def _coord(self, val: NVector):
         return NVector(
             self.target_size.x * (val.x / (self.view_p2.x - self.view_p1.x) + 0.5),
             self.target_size.y * (val.y / (self.view_p2.y - self.view_p1.y) + 0.5),
         )
 
     def _convert_polygon(self, layer: api.PolygonLayer):
         lot = objects.Path()
         animatables = [self._convert_vector(layer.origin)] + [
             self._convert_vector(p)
             for p in layer.points
         ]
         animated = any(x.animated for x in animatables)
         if not animated:
             lot.shape.value = self._polygon([x.value for x in animatables[1:]], animatables[0].value)
         else:
             for values in self._mix_animations(*animatables):
                 time = values[0]
                 origin = values[1]
                 points = values[2:]
                 lot.shape.add_keyframe(time, self._polygon(points, origin))
         return lot
 
     def _polygon(self, points, origin):
         bezier = objects.Bezier()
         bezier.closed = True
         for point in points:
             bezier.add_point(self._coord(point+origin))
         return bezier
 
     def _convert_bline(self, layer: api.AbstractOutline):
         lot = objects.Path()
         closed = layer.bline.loop
         animatables = [
             self._convert_vector(layer.origin)
         ]
         for p in layer.bline.points:
             animatables += [
                 self._convert_vector(p.point),
                 self._convert_scalar(p.t1.radius) if hasattr(p.t1, "radius") else objects.Value(0),
                 self._convert_scalar(p.t1.theta) if hasattr(p.t1, "radius") else objects.Value(0),
                 self._convert_scalar(p.t2.radius) if hasattr(p.t2, "radius") else objects.Value(0),
                 self._convert_scalar(p.t2.theta) if hasattr(p.t2, "radius") else objects.Value(0)
             ]
         animated = any(x.animated for x in animatables)
         if not animated:
             lot.shape.value = self._bezier(
                 closed, [x.value for x in animatables[1:]], animatables[0].value, layer.bline.points
             )
         else:
             for values in self._mix_animations(*animatables):
                 time = values[0]
                 origin = values[1]
                 values = values[2:]
                 lot.shape.add_keyframe(time, self._bezier(closed, values, origin, layer.bline.points))
         return lot
 
     def _bezier(self, closed, values, origin, points):
         chunk_size = 5
         bezier = objects.Bezier()
         bezier.closed = closed
         for i in range(0, len(values), chunk_size):
             point, r1, a1, r2, a2 = values[i:i+chunk_size]
             sifvert = point+origin
             vert = self._coord(sifvert)
             if not points[i//chunk_size].split_radius.value:
                 r2 = r1
             if not points[i//chunk_size].split_angle.value:
                 a2 = a1
             t1 = self._coord(sifvert + self._polar(r1, a1, 1)) - vert
             t2 = self._coord(sifvert + self._polar(r2, a2, 2)) - vert
             bezier.add_point(vert, t1, t2)
         return bezier
 
     def _polar(self, radius, angle, dir):
         offset_angle = 0
         if dir == 1:
             offset_angle += 180
         return PolarVector(radius/3, (angle+offset_angle) * math.pi / 180)
 
     def _convert_transform_down(self, tl: api.TransformDown):
         group = objects.Group()
         self._set_name(group, tl)
 
         if isinstance(tl, api.TranslateLayer):
             group.transform.anchor_point.value = self.target_size / 2
             group.transform.position = self._adjust_coords(self._convert_vector(tl.origin))
         elif isinstance(tl, api.RotateLayer):
             group.transform.anchor_point = self._adjust_coords(self._convert_vector(tl.origin))
             group.transform.position = group.transform.anchor_point.clone()
             group.transform.rotation = self._adjust_angle(self._convert_scalar(tl.amount))
         elif isinstance(tl, api.ScaleLayer):
             group.transform.anchor_point = self._adjust_coords(self._convert_vector(tl.center))
             group.transform.position = group.transform.anchor_point.clone()
             group.transform.scale = self._adjust_add_dimension(
                 self._convert_scalar(tl.amount),
                 self._zoom_to_scale
             )
 
         return group
 
     def _zoom_to_scale(self, value):
         zoom = math.e ** value * 100
         return NVector(zoom, zoom)
 
     def _set_name(self, lottie, sif):
         lottie.name = sif.desc if sif.desc is not None else sif.__class__.__name__
 
     def _convert_gradient(self, layer: api.GradientLayer, parent):
         group = objects.Group()
 
         parent_shapes = parent.shapes
         parent.shapes = []
         if isinstance(parent, objects.Group):
             parent.shapes.append(parent_shapes[-1])
 
         self._gradient_gather_shapes(parent_shapes, group)
 
         gradient = objects.GradientFill()
         self._set_name(gradient, layer)
         group.add_shape(gradient)
         gradient.colors = self._convert_gradient_stops(layer.gradient)
         gradient.opacity = self._adjust_animated(
             self._convert_scalar(layer.amount),
             lambda x: x * 100
         )
 
         if isinstance(layer, api.LinearGradient):
             gradient.start_point = self._adjust_coords(self._convert_vector(layer.p1))
             gradient.end_point = self._adjust_coords(self._convert_vector(layer.p2))
             gradient.gradient_type = objects.GradientType.Linear
         elif isinstance(layer, api.RadialGradient):
             gradient.gradient_type = objects.GradientType.Radial
             gradient.start_point = self._adjust_coords(self._convert_vector(layer.center))
             radius = self._adjust_animated(self._convert_scalar(layer.radius), lambda x: x*45)
             if not radius.animated and not gradient.start_point.animated:
                 gradient.end_point.value = gradient.start_point.value + NVector(radius.value, radius.value)
             else:
                 for time, c, r in self._mix_animations(gradient.start_point.clone(), radius):
                     gradient.end_point.add_keyframe(time, c + NVector(r + r))
 
         return group
 
     def _gradient_gather_shapes(self, shapes, output: objects.Group):
         for shape in shapes:
             if isinstance(shape, objects.Shape):
                 output.add_shape(shape)
             elif isinstance(shape, objects.Group):
                 self._gradient_gather_shapes(shape.shapes, output)
 
     def _convert_gradient_stops(self, sif_gradient):
         stops = objects.GradientColors()
         if not self._animated(sif_gradient):
             stops.set_stops(self._flatten_gradient_colors(sif_gradient.value))
             stops.count = len(sif_gradient.value)
         else:
             # TODO easing
             for kf in sif_gradient.keyframes:
                 stops.add_keyframe(self._time(kf.time), self._flatten_gradient_colors(kf.value))
                 stops.count = len(kf.value)
 
         return stops
 
     def _flatten_gradient_colors(self, stops):
         return [
             (stop.pos, self._color_gamma(stop.color))
             for stop in stops
         ]
 
     def _convert_text(self, layer: api.TextLayer):
         shape = font.FontShape(layer.text.value, font.FontStyle(layer.family.value, 110, font.TextJustify.Center))
         shape.refresh()
         trans = shape.wrapped.transform
         trans.anchor_point.value = shape.wrapped.bounding_box().center()
         trans.anchor_point.value.x /= 2
         trans.position = self._adjust_coords(self._convert_vector(layer.origin))
         trans.scale = self._adjust_animated(
             self._convert_vector(layer.size),
             lambda v: v * 100
         )
         return shape