import pydiffvg
import torch
# import skimage
# import numpy as np
# Use GPU if available
pydiffvg.set_use_gpu(torch.cuda.is_available())
canvas_width = 256
canvas_height = 256
circle = pydiffvg.Circle(radius=torch.tensor(40.0),
center=torch.tensor([128.0, 128.0]))
shapes = [circle]
circle_group = pydiffvg.ShapeGroup(shape_ids=torch.tensor([0]),
fill_color=torch.tensor(
[0.3, 0.6, 0.3, 1.0]))
shape_groups = [circle_group]
scene_args = pydiffvg.RenderFunction.serialize_scene(
canvas_width,
canvas_height,
shapes,
shape_groups,
output_type=pydiffvg.OutputType.sdf)
render = pydiffvg.RenderFunction.apply
img = render(
256, # width
256, # height
2, # num_samples_x
2, # num_samples_y
0, # seed
def save(self,
all_points,
save_dir,
name,
verbose=False,
white_background=True):
# note that this if for a single shape and bs dimension should have multiple curves
# print('1:', process.memory_info().rss*1e-6)
render_size = self.imsize
bs = all_points.shape[0]
if verbose:
render_size = render_size * 2
all_points = all_points * render_size
num_ctrl_pts = torch.zeros(self.curves, dtype=torch.int32) + 2
shapes = []
shape_groups = []
for k in range(bs):
# Get point parameters from network
color = make_tensor(color[k])
points = all_points[k].cpu().contiguous() #[self.sort_idx[k]]
if verbose:
np.random.seed(0)
colors = np.random.rand(self.curves, 4)
high = np.array((0.565, 0.392, 0.173, 1))
low = np.array((0.094, 0.310, 0.635, 1))
diff = (high - low) / (self.curves)
colors[:, 3] = 1
for i in range(self.curves):
scale = diff * i
color = low + scale
color[3] = 1
color = torch.tensor(color)
num_ctrl_pts = torch.zeros(1, dtype=torch.int32) + 2
if i * 3 + 4 > self.curves * 3:
curve_points = torch.stack([
points[i * 3], points[i * 3 + 1],
points[i * 3 + 2], points[0]
])
else:
curve_points = points[i * 3:i * 3 + 4]
path = pydiffvg.Path(num_control_points=num_ctrl_pts,
points=curve_points,
is_closed=False,
stroke_width=torch.tensor(4))
path_group = pydiffvg.ShapeGroup(shape_ids=torch.tensor(
[i]),
fill_color=None,
stroke_color=color)
shapes.append(path)
shape_groups.append(path_group)
for i in range(self.curves * 3):
scale = diff * (i // 3)
color = low + scale
color[3] = 1
color = torch.tensor(color)
if i % 3 == 0:
# color = torch.tensor(colors[i//3]) #green
shape = pydiffvg.Rect(p_min=points[i] - 8,
p_max=points[i] + 8)
group = pydiffvg.ShapeGroup(shape_ids=torch.tensor(
[self.curves + i]),
fill_color=color)
else:
# color = torch.tensor(colors[i//3]) #purple
shape = pydiffvg.Circle(radius=torch.tensor(8.0),
center=points[i])
group = pydiffvg.ShapeGroup(shape_ids=torch.tensor(
[self.curves + i]),
fill_color=color)
shapes.append(shape)
shape_groups.append(group)
else:
path = pydiffvg.Path(num_control_points=num_ctrl_pts,
points=points,
is_closed=True)
shapes.append(path)
path_group = pydiffvg.ShapeGroup(shape_ids=torch.tensor(
[len(shapes) - 1]),
fill_color=color,
stroke_color=color)
shape_groups.append(path_group)
pydiffvg.save_svg(f"{save_dir}{name}/{name}.svg", self.imsize,
self.imsize, shapes, shape_groups)
def parse_shape(node, transform, fill_color, shapes, shape_groups, defs):
tag = remove_namespaces(node.tag)
new_transform, new_fill_color, stroke_color, stroke_width, use_even_odd_rule = \
parse_common_attrib(node, transform, fill_color, defs)
if tag == 'path':
d = node.attrib['d']
name = ''
if 'id' in node.attrib:
name = node.attrib['id']
force_closing = new_fill_color is not None
paths = pydiffvg.from_svg_path(d, new_transform, force_closing)
for idx, path in enumerate(paths):
assert (path.points.shape[1] == 2)
path.stroke_width = stroke_width
path.source_id = name
path.id = "{}-{}".format(name, idx) if len(paths) > 1 else name
prev_shapes_size = len(shapes)
shapes = shapes + paths
shape_ids = torch.tensor(list(range(prev_shapes_size, len(shapes))))
shape_groups.append(pydiffvg.ShapeGroup(\
shape_ids = shape_ids,
fill_color = new_fill_color,
stroke_color = stroke_color,
use_even_odd_rule = use_even_odd_rule,
id = name))
elif tag == 'polygon':
name = ''
if 'id' in node.attrib:
name = node.attrib['id']
force_closing = new_fill_color is not None
pts = node.attrib['points'].strip()
pts = pts.split(' ')
# import ipdb; ipdb.set_trace()
pts = [[float(y) for y in re.split(',| ', x)] for x in pts if x]
pts = torch.tensor(pts, dtype=torch.float32).view(-1, 2)
polygon = pydiffvg.Polygon(pts, force_closing)
polygon.stroke_width = stroke_width
shape_ids = torch.tensor([len(shapes)])
shapes.append(polygon)
shape_groups.append(pydiffvg.ShapeGroup(\
shape_ids = shape_ids,
fill_color = new_fill_color,
stroke_color = stroke_color,
use_even_odd_rule = use_even_odd_rule,
shape_to_canvas = new_transform,
id = name))
elif tag == 'line':
x1 = float(node.attrib['x1'])
y1 = float(node.attrib['y1'])
x2 = float(node.attrib['x2'])
y2 = float(node.attrib['y2'])
p1 = torch.tensor([x1, y1])
p2 = torch.tensor([x2, y2])
points = torch.stack((p1, p2))
line = pydiffvg.Polygon(points, False)
line.stroke_width = stroke_width
shape_ids = torch.tensor([len(shapes)])
shapes.append(line)
shape_groups.append(pydiffvg.ShapeGroup(\
shape_ids = shape_ids,
fill_color = new_fill_color,
stroke_color = stroke_color,
use_even_odd_rule = use_even_odd_rule,
shape_to_canvas = new_transform))
elif tag == 'circle':
radius = float(node.attrib['r'])
cx = float(node.attrib['cx'])
cy = float(node.attrib['cy'])
name = ''
if 'id' in node.attrib:
name = node.attrib['id']
center = torch.tensor([cx, cy])
circle = pydiffvg.Circle(radius=torch.tensor(radius), center=center)
circle.stroke_width = stroke_width
shape_ids = torch.tensor([len(shapes)])
shapes.append(circle)
shape_groups.append(pydiffvg.ShapeGroup(\
shape_ids = shape_ids,
fill_color = new_fill_color,
stroke_color = stroke_color,
use_even_odd_rule = use_even_odd_rule,
shape_to_canvas = new_transform))
elif tag == 'ellipse':
rx = float(node.attrib['rx'])
ry = float(node.attrib['ry'])
cx = float(node.attrib['cx'])
cy = float(node.attrib['cy'])
name = ''
if 'id' in node.attrib:
name = node.attrib['id']
center = torch.tensor([cx, cy])
circle = pydiffvg.Circle(radius=torch.tensor(radius), center=center)
circle.stroke_width = stroke_width
shape_ids = torch.tensor([len(shapes)])
shapes.append(circle)
shape_groups.append(pydiffvg.ShapeGroup(\
shape_ids = shape_ids,
fill_color = new_fill_color,
stroke_color = stroke_color,
use_even_odd_rule = use_even_odd_rule,
shape_to_canvas = new_transform))
elif tag == 'rect':
x = 0.0
y = 0.0
if x in node.attrib:
x = float(node.attrib['x'])
if y in node.attrib:
y = float(node.attrib['y'])
w = float(node.attrib['width'])
h = float(node.attrib['height'])
p_min = torch.tensor([x, y])
p_max = torch.tensor([x + w, x + h])
rect = pydiffvg.Rect(p_min=p_min, p_max=p_max)
rect.stroke_width = stroke_width
shape_ids = torch.tensor([len(shapes)])
shapes.append(rect)
shape_groups.append(pydiffvg.ShapeGroup(\
shape_ids = shape_ids,
fill_color = new_fill_color,
stroke_color = stroke_color,
use_even_odd_rule = use_even_odd_rule,
shape_to_canvas = new_transform))
return shapes, shape_groups
def my_render(curve_points, curve_widths, curve_alphas,
circle_centers, circle_radiuses, circle_widths, circle_alphas,
canvas_size=32, colors=None):
dev = curve_points.device
curve_points = 0.5*(curve_points + 1.0) * canvas_size
circle_centers = 0.5*(circle_centers + 1.0) * canvas_size
circle_radiuses = circle_radiuses * canvas_size / 2
eps = 1e-4
curve_points = curve_points + eps*torch.randn_like(curve_points)
bs, num_strokes, num_pts, _ = curve_points.shape
num_segments = (num_pts - 1) // 3
num_circles = circle_centers.shape[1]
n_out = 3 if colors is not None else 1
output = torch.zeros(bs, n_out, canvas_size, canvas_size,
device=curve_points.device)
scenes = []
for k in range(bs):
shapes = []
shape_groups = []
for p in range(num_strokes):
points = curve_points[k, p].contiguous().cuda()
# bezier
num_ctrl_pts = torch.zeros(num_segments, dtype=torch.int32) + 2
width = curve_widths[k, p].cuda()
alpha = curve_alphas[k, p].cuda()
if colors is not None:
color = colors[k, p]
else:
color = torch.ones(3, device=alpha.device)
color = torch.cat([color, alpha.view(1,)])
path = pydiffvg.Path(
num_control_points=num_ctrl_pts, points=points,
stroke_width=width, is_closed=False)
shapes.append(path)
path_group = pydiffvg.ShapeGroup(
shape_ids=torch.tensor([len(shapes) - 1]),
fill_color=None,
stroke_color=color)
shape_groups.append(path_group)
for c in range(num_circles):
center = circle_centers[k, c]
radius = circle_radiuses[k, c]
width = circle_widths[k, c]
alpha = circle_alphas[k, c]
circle = pydiffvg.Circle(radius=radius,
center=center,
stroke_width=width)
shapes.append(circle)
if colors is not None:
color = colors[k, p]
else:
color = torch.ones(3, device=alpha.device)
color = torch.cat([color, alpha.view(1,)])
circle_group = pydiffvg.ShapeGroup(shape_ids=torch.tensor([len(shapes) - 1]),
fill_color=torch.tensor([0, 0, 0, 0.0]),
stroke_color=color,
)
shape_groups.append(circle_group)
# Rasterize
scenes.append((canvas_size, canvas_size, shapes, shape_groups))
raster = render(canvas_size, canvas_size, shapes, shape_groups,
samples=2)
raster = raster.permute(2, 0, 1).view(4, canvas_size, canvas_size)
alpha = raster[3:4]
if colors is not None: # color output
image = raster[:3]
alpha = alpha.repeat(3, 1, 1)
else:
image = raster[:1]
# alpha compositing
image = image*alpha
output[k] = image
output = output.to(dev)
return output, scenes
def raster(all_points,
color=[0, 0, 0, 1],
verbose=False,
white_background=True):
assert len(color) == 4
# print('1:', process.memory_info().rss*1e-6)
render_size = 512
paths = int(all_points.shape[0] / 3)
bs = 1 #all_points.shape[0]
outputs = []
scaling = torch.zeros([1, 2])
scaling[:, 0] = 512 / 24
scaling[:, 1] = 512 / 24
print(scaling)
all_points = all_points * scaling
num_ctrl_pts = torch.zeros(paths, dtype=torch.int32) + 2
color = make_tensor(color)
for k in range(bs):
# Get point parameters from network
shapes = []
shape_groups = []
points = all_points.cpu().contiguous() # [self.sort_idx[k]]
if verbose:
np.random.seed(0)
colors = np.random.rand(paths, 4)
high = np.array((0.565, 0.392, 0.173, 1))
low = np.array((0.094, 0.310, 0.635, 1))
diff = (high - low) / (paths)
colors[:, 3] = 1
for i in range(paths):
scale = diff * i
color = low + scale
color[3] = 1
color = torch.tensor(color)
num_ctrl_pts = torch.zeros(1, dtype=torch.int32) + 2
if i * 3 + 4 > paths * 3:
curve_points = torch.stack([
points[i * 3], points[i * 3 + 1], points[i * 3 + 2],
points[0]
])
else:
curve_points = points[i * 3:i * 3 + 4]
path = pydiffvg.Path(num_control_points=num_ctrl_pts,
points=curve_points,
is_closed=False,
stroke_width=torch.tensor(4))
path_group = pydiffvg.ShapeGroup(shape_ids=torch.tensor([i]),
fill_color=None,
stroke_color=color)
shapes.append(path)
shape_groups.append(path_group)
for i in range(paths * 3):
scale = diff * (i // 3)
color = low + scale
color[3] = 1
color = torch.tensor(color)
if i % 3 == 0:
# color = torch.tensor(colors[i//3]) #green
shape = pydiffvg.Rect(p_min=points[i] - 8,
p_max=points[i] + 8)
group = pydiffvg.ShapeGroup(shape_ids=torch.tensor(
[paths + i]),
fill_color=color)
else:
# color = torch.tensor(colors[i//3]) #purple
shape = pydiffvg.Circle(radius=torch.tensor(8.0),
center=points[i])
group = pydiffvg.ShapeGroup(shape_ids=torch.tensor(
[paths + i]),
fill_color=color)
shapes.append(shape)
shape_groups.append(group)
else:
path = pydiffvg.Path(num_control_points=num_ctrl_pts,
points=points,
is_closed=True)
shapes.append(path)
path_group = pydiffvg.ShapeGroup(shape_ids=torch.tensor(
[len(shapes) - 1]),
fill_color=color,
stroke_color=color)
shape_groups.append(path_group)
scene_args = pydiffvg.RenderFunction.serialize_scene(
render_size, render_size, shapes, shape_groups)
out = render(
render_size, # width
render_size, # height
2, # num_samples_x
2, # num_samples_y
102, # seed
None,
*scene_args)
out = out.permute(2, 0,
1).view(4, render_size,
render_size) # [:3]#.mean(0, keepdim=True)
outputs.append(out)
output = torch.stack(outputs).to(all_points.device)
alpha = output[:, 3:4, :, :]
# map to [-1, 1]
if white_background:
output_white_bg = output[:, :3, :, :] * alpha + (1 - alpha)
output = torch.cat([output_white_bg, alpha], dim=1)
del num_ctrl_pts, color
return output
import pydiffvg
import torch
import skimage
import numpy as np
# Use GPU if available
pydiffvg.set_use_gpu(torch.cuda.is_available())
canvas_width, canvas_height = 256, 256
circle = pydiffvg.Circle(radius=torch.tensor(40.0),
center=torch.tensor([128.0, 128.0]),
stroke_width=torch.tensor(5.0))
shapes = [circle]
circle_group = pydiffvg.ShapeGroup(
shape_ids=torch.tensor([0]),
fill_color=torch.tensor([0.3, 0.6, 0.3, 1.0]),
stroke_color=torch.tensor([0.6, 0.3, 0.6, 0.8]))
shape_groups = [circle_group]
scene_args = pydiffvg.RenderFunction.serialize_scene(\
canvas_width, canvas_height, shapes, shape_groups)
render = pydiffvg.RenderFunction.apply
img = render(
256, # width
256, # height
2, # num_samples_x
2, # num_samples_y
0, # seed
None,
*scene_args)
# The output image is in linear RGB space. Do Gamma correction before saving the image.
