def get(self, request, pk=None, project_pk=None, image_filename=""):
"""
Download a task's image
"""
task = self.get_and_check_task(request, pk)
image = ImageUpload.objects.filter(task=task, image=assets_directory_path(task.id, task.project.id, image_filename)).first()
if image is None:
raise exceptions.NotFound()
image_path = image.path()
if not os.path.isfile(image_path):
raise exceptions.NotFound()
return download_file_response(request, image_path, 'attachment')
def get(self, request, pk=None, project_pk=None, image_filename=""):
"""
Generate a thumbnail on the fly for a particular task's image
"""
task = self.get_and_check_task(request, pk)
image = ImageUpload.objects.filter(task=task, image=assets_directory_path(task.id, task.project.id, image_filename)).first()
if image is None:
raise exceptions.NotFound()
image_path = image.path()
if not os.path.isfile(image_path):
raise exceptions.NotFound()
try:
thumb_size = int(self.request.query_params.get('size', 512))
if thumb_size < 1:
raise ValueError()
quality = int(self.request.query_params.get('quality', 75))
if quality < 0 or quality > 100:
raise ValueError()
except ValueError:
raise exceptions.ValidationError("Invalid query parameters")
with Image.open(image_path) as img:
if img.mode != 'RGB':
img = normalize(img)
img = img.convert('RGB')
img.thumbnail((thumb_size, thumb_size))
output = io.BytesIO()
img.save(output, format='JPEG', quality=quality)
res = HttpResponse(content_type="image/jpeg")
res['Content-Disposition'] = 'inline'
res.write(output.getvalue())
output.close()
return res
def get(self, request, pk=None, project_pk=None, image_filename=""):
"""
Generate a thumbnail on the fly for a particular task's image
"""
task = self.get_and_check_task(request, pk)
image = ImageUpload.objects.filter(task=task, image=assets_directory_path(task.id, task.project.id, image_filename)).first()
if image is None:
raise exceptions.NotFound()
image_path = image.path()
if not os.path.isfile(image_path):
raise exceptions.NotFound()
try:
thumb_size = int(self.request.query_params.get('size', 512))
if thumb_size < 1:
raise ValueError()
quality = int(self.request.query_params.get('quality', 75))
if quality < 0 or quality > 100:
raise ValueError()
center_x = float(self.request.query_params.get('center_x', '0.5'))
center_y = float(self.request.query_params.get('center_y', '0.5'))
if center_x < -0.5 or center_x > 1.5 or center_y < -0.5 or center_y > 1.5:
raise ValueError()
draw_points = self.request.query_params.getlist('draw_point')
point_colors = self.request.query_params.getlist('point_color')
point_radiuses = self.request.query_params.getlist('point_radius')
points = []
i = 0
for p in draw_points:
coords = list(map(float, p.split(",")))
if len(coords) != 2:
raise ValueError()
points.append({
'x': coords[0],
'y': coords[1],
'color': hex2rgb(point_colors[i]) if i < len(point_colors) else (255, 255, 255),
'radius': float(point_radiuses[i]) if i < len(point_radiuses) else 1.0,
})
i += 1
zoom = float(self.request.query_params.get('zoom', '1'))
if zoom < 0.1 or zoom > 10:
raise ValueError()
except ValueError:
raise exceptions.ValidationError("Invalid query parameters")
with Image.open(image_path) as img:
if img.mode != 'RGB':
img = normalize(img)
img = img.convert('RGB')
w, h = img.size
thumb_size = min(max(w, h), thumb_size)
# Move image center
if center_x != 0.5 or center_y != 0.5:
img = img.crop((
w * (center_x - 0.5),
h * (center_y - 0.5),
w * (center_x + 0.5),
h * (center_y + 0.5)
))
# Scale
scale_factor = 1
off_x = 0
off_y = 0
if zoom != 1:
scale_factor = (2 ** (zoom - 1))
off_x = w / 2.0 - w / scale_factor / 2.0
off_y = h / 2.0 - h / scale_factor / 2.0
win = img.crop((off_x, off_y,
off_x + (w / scale_factor),
off_y + (h / scale_factor)
))
img = ImageOps.scale(win, scale_factor, Image.NEAREST)
sw, sh = w * scale_factor, h * scale_factor
# Draw points
for p in points:
d = ImageDraw.Draw(img)
r = p['radius'] * max(w, h) / 100.0
sx = (p['x'] + (0.5 - center_x)) * sw
sy = (p['y'] + (0.5 - center_y)) * sh
x = sx - off_x * scale_factor
y = sy - off_y * scale_factor
d.ellipse([(x - r, y - r),
(x + r, y + r)], outline=p['color'], width=int(max(1.0, math.floor(r / 3.0))))
img.thumbnail((thumb_size, thumb_size))
output = io.BytesIO()
img.save(output, format='JPEG', quality=quality)
res = HttpResponse(content_type="image/jpeg")
res['Content-Disposition'] = 'inline'
res.write(output.getvalue())
output.close()
return res