def __init__(self, size, *args, **kwargs):
super().__init__()
self._width = size[0]
self._height = size[1]
self.pix_format = kwargs.get('pix_format', 'bgra32')
shape = (self._height, self._width, 4)
buffer = np.zeros(shape, dtype=np.uint8)
canvas_klass = pix_format_canvases[self.pix_format]
self.gc = canvas_klass(buffer, bottom_up=True)
self.marker_gc = MarkerRenderer(
buffer, pix_format=self.pix_format, bottom_up=True
)
# init the state variables
clip = agg.Rect(0, 0, self._width, self._height)
self.canvas_state = agg.GraphicsState(clip_box=clip)
self.stroke_paint = agg.SolidPaint(0.0, 0.0, 0.0)
self.fill_paint = agg.SolidPaint(0.0, 0.0, 0.0)
self.path = CompiledPath()
self.text_transform = agg.Transform()
self.text_pos = (0.0, 0.0)
self.transform = agg.Transform()
self.font = None
self.__state_stack = []
# For HiDPI support
self.base_scale = kwargs.pop('base_pixel_scale', 1)
self.transform.scale(self.base_scale, self.base_scale)
# Make this look like a kiva.agg GC
self.bmp_array = buffer
def test_bad_method_args():
canvas = agg.CanvasG8(np.zeros((1, 1), dtype=np.uint8))
pix_format = agg.PixelFormat.Gray8
gs = agg.GraphicsState()
path = agg.Path()
transform = agg.Transform()
with pytest.raises(TypeError):
canvas.draw_image(None, pix_format, transform, gs)
with pytest.raises(TypeError):
canvas.draw_image(canvas.array, None, transform, gs)
with pytest.raises(TypeError):
canvas.draw_image(canvas.array, pix_format, None, gs)
with pytest.raises(TypeError):
canvas.draw_image(canvas.array, pix_format, transform, None)
# But this version should work
canvas.draw_image(canvas.image, None, transform, gs)
with pytest.raises(TypeError):
canvas.draw_shape(None, transform, gs)
with pytest.raises(TypeError):
canvas.draw_shape(path, None, gs)
with pytest.raises(TypeError):
canvas.draw_shape(path, transform, None)
text = "Hello!"
font = agg.Font("Times New Roman", 12.0, agg.FontCacheType.RasterFontCache)
with pytest.raises(TypeError):
canvas.draw_text(text, None, transform, gs)
with pytest.raises(TypeError):
canvas.draw_text(text, font, None, gs)
with pytest.raises(TypeError):
canvas.draw_text(text, font, transform, None)
def spiral(size, hue, sat, val):
canvas = agg.CanvasRGB24(np.zeros((size[1], size[0], 3), dtype=np.uint8))
gs = agg.GraphicsState(drawing_mode=agg.DrawingMode.DrawFill)
transform = agg.Transform()
circle = agg.Path()
circle.ellipse(0, 0, CIRCLE_SIZE, CIRCLE_SIZE)
divisions = np.linspace(0, 2*np.pi, CIRCLE_COUNT, endpoint=False)
centers = np.stack((np.cos(divisions), np.sin(divisions)), axis=1)
offsets = compute_offsets(np.sqrt(size[0]**2 + size[1]**2) / 2)
color_count = len(offsets)
hsv = np.ones((color_count, 1, 3))
hsv[:, 0, 0] = np.linspace(hue[0], hue[1], color_count, endpoint=False)
hsv[:, 0, 1] = np.linspace(sat[0], sat[1], color_count, endpoint=False)
hsv[:, 0, 2] = np.linspace(val[0], val[1], color_count, endpoint=False)
spectrum = hsv2rgb(hsv).reshape(color_count, 3)
for idx, offset in enumerate(offsets):
paint = agg.SolidPaint(*spectrum[idx])
radius = np.pi * offset / CIRCLE_COUNT
scale = radius / CIRCLE_SIZE
for i in range(CIRCLE_COUNT):
if ((idx + i) % 2) == 0:
continue
transform.reset()
transform.translate(size[0]/2 + offset*centers[i, 0],
size[1]/2 + offset*centers[i, 1])
transform.scale(scale, scale)
canvas.draw_shape(circle, transform, gs, fill=paint)
imsave('spiral.png', canvas.array)
def draw_mask(image_shape, geometry, antialias=False):
"""Draw a mask (0-255) from a given celiagg path. Requires celiagg installed.
Note: to produce a True/False mask from the output, simply do the following:
mask = draw_mask(image_shape, geometry)
bool_mask = mask > 0
Parameters:
image_shape: shape of the resulting image
geometry: celiagg VertexSource class, such as celiagg.Path or
celiagg.BSpline, containing geometry to draw
antialias: if False (default), output contains only 0 and 255. If True,
output will be antialiased (better for visualization).
Returns: mask array of dtype numpy.uint8
"""
import celiagg
image = numpy.zeros(image_shape, dtype=numpy.uint8, order='F')
# NB celiagg uses (h, w) C-order convention for image shapes, so give it the transpose
canvas = celiagg.CanvasG8(image.T)
state = celiagg.GraphicsState(drawing_mode=celiagg.DrawingMode.DrawFill, anti_aliased=antialias)
fill = celiagg.SolidPaint(1,1,1)
transform = celiagg.Transform()
canvas.draw_shape(geometry, transform, state, fill=fill)
return image
def test_stencil_size_mismatch():
canvas = agg.CanvasRGB24(np.zeros((4, 5, 3), dtype=np.uint8))
stencil_canvas = agg.CanvasG8(np.zeros((1, 2), dtype=np.uint8))
gs = agg.GraphicsState(stencil=stencil_canvas.image)
path = agg.Path()
transform = agg.Transform()
with pytest.raises(agg.AggError):
canvas.draw_shape(path, transform, gs)
def terrain(size):
canvas = agg.CanvasRGB24(np.empty((size[1], size[0], 3), dtype='uint8'),
bottom_up=True)
gs = agg.GraphicsState(drawing_mode=agg.DrawingMode.DrawFill)
sky(size[0], size[1], canvas, gs)
xs, ys = gen_horizon(nearest_pow2(size[0] // 4) + 1, size[0], size[1])
draw_horizon(xs, ys / 2, canvas, gs)
imsave('terrain.png', canvas.array)
def test_no_text_draw_text_failure():
if agg.HAS_TEXT:
return
buffer = np.zeros((1, 1), dtype=np.uint8)
canvas = agg.CanvasG8(buffer)
transform = agg.Transform()
line_paint = agg.SolidPaint(1.0, 1.0, 1.0)
gs = agg.GraphicsState()
with pytest.raises(RuntimeError):
canvas.draw_text("", None, transform, line_paint, line_paint, gs)
def _clip_impl(self, shape, drawing_mode):
""" Internal implementation for the complex clipping methods.
"""
size = (self._height, self._width)
stencil = agg.CanvasG8(np.empty(size, dtype=np.uint8), bottom_up=True)
stencil.clear(0.0, 0.0, 0.0)
clip_box = agg.Rect(0, 0, self._width, self._height)
gs = agg.GraphicsState(drawing_mode=drawing_mode, clip_box=clip_box)
paint = agg.SolidPaint(1.0, 1.0, 1.0)
stencil.draw_shape(shape, self.transform, gs, stroke=paint, fill=paint)
self.canvas_state.stencil = stencil.image
def __init__(self, size, *args, **kwargs):
super(GraphicsContext, self).__init__()
self._width = size[0]
self._height = size[1]
self.pix_format = kwargs.get('pix_format', 'rgba32')
shape = (self._height, self._width, 4)
canvas_klass = pix_format_canvases[self.pix_format]
self.gc = canvas_klass(np.zeros(shape, dtype=np.uint8), bottom_up=True)
# init the state variables
clip = agg.Rect(0, 0, self._width, self._height)
self.canvas_state = agg.GraphicsState(clip_box=clip)
self.stroke_paint = agg.SolidPaint(0.0, 0.0, 0.0)
self.fill_paint = agg.SolidPaint(0.0, 0.0, 0.0)
self.path = CompiledPath()
self.text_transform = agg.Transform()
self.text_pos = (0.0, 0.0)
self.transform = agg.Transform()
self.font = None
self.__state_stack = []
def interpret_state(style, stroke, fill):
state = agg.GraphicsState(
master_alpha=float(style.get('opacity', 1.0)),
line_width=parse_united(style.get('stroke-width', '1')),
miter_limit=float(style.get('stroke-miterlimit', 4.0)))
mode = agg.DrawingMode.DrawFillStroke
if 'nonzero' == style.get('stroke-fillrule', 'nonzero'):
if stroke is None and fill is not None:
mode = agg.DrawingMode.DrawFill
elif stroke is not None and fill is None:
mode = agg.DrawingMode.DrawStroke
elif stroke is not None and fill is not None:
mode = agg.DrawingMode.DrawFillStroke
else:
if stroke is None and fill is not None:
mode = agg.DrawingMode.EofDrawFill
elif stroke is not None and fill is None:
mode = agg.DrawingMode.EofDrawStroke
elif stroke is not None and fill is not None:
mode = agg.DrawingMode.EofDrawFillStroke
state.drawing_mode = mode
return state
def state():
return agg.GraphicsState(anti_aliased=False, line_width=1.0)
star_shape = agg.Path()
star_shape.lines([pts[i] for i in (0, 2, 4, 1, 3)])
star_shape.close()
star_transform = agg.Transform()
star_transform.translate(SIZE / 2, SIZE / 2)
star_transform.rotate(-np.pi / 2)
star_transform.translate(-SIZE / 2, -SIZE / 2)
big_box = agg.Path()
big_box.rect(0, 0, SIZE, SIZE)
small_box = agg.Path()
small_box.rect(0, 0, SIZE / 2, SIZE / 2)
stencil_canvas = agg.CanvasG8(np.zeros((SIZE, SIZE), dtype=np.uint8))
canvas = agg.CanvasRGB24(np.zeros((SIZE, SIZE, 3), dtype=np.uint8))
gs = agg.GraphicsState(drawing_mode=agg.DrawingMode.DrawFill, line_width=6.0)
transform = agg.Transform()
blue_paint = agg.SolidPaint(0.1, 0.1, 1.0)
white_paint = agg.SolidPaint(1.0, 1.0, 1.0)
stops = ((0.0, 0.0, 0.0, 0.0, 1.0), (1.0, 0.3, 0.3, 0.75, 1.0))
bw_grad = agg.LinearGradientPaint(0, 0, 2, 5, stops,
agg.GradientSpread.SpreadReflect,
agg.GradientUnits.UserSpace)
stops = ((0.0, 1.0, 1.0, 1.0, 1.0), (1.0, 0.7, 0.7, 0.25, 1.0))
lin_grad = agg.LinearGradientPaint(0, 0, 2, 5, stops,
agg.GradientSpread.SpreadReflect,
agg.GradientUnits.UserSpace)
stencil_canvas.clear(0, 0, 0)
stencil_canvas.draw_shape(star_shape, star_transform, gs, fill=white_paint)
import celiagg as agg
import numpy as np
from skimage.io import imsave
canvas = agg.CanvasRGB24(np.ones((400, 400, 3), dtype=np.uint8))
state = agg.GraphicsState(drawing_mode=agg.DrawingMode.DrawStroke,
line_width=10.0)
transform = agg.Transform()
red_paint = agg.SolidPaint(1.0, 0.0, 0.0)
black_paint = agg.SolidPaint(0.0, 0.0, 0.0)
font = agg.Font("/Library/Fonts/Verdana.ttf", 96.0,
agg.FontCacheType.RasterFontCache)
path = agg.Path()
path.ellipse(200, 200, 190, 190)
canvas.clear(1.0, 1.0, 1.0)
canvas.draw_shape(path, transform, state, stroke=red_paint)
transform.translate(30.0, 220.0)
canvas.draw_text("celiagg", font, transform, state, stroke=black_paint)
imsave("example.png", canvas.array)
import pathlib
import pickle
import numpy
import celiagg
import freeimage
from zplib.curve import spline_geometry
from zplib.curve import interpolate
from zplib.image import resample
AGG_STATE = celiagg.GraphicsState(anti_aliased=False)
AGG_PAINT = celiagg.SolidPaint(1, 1, 1)
AGG_TRANSFORM = celiagg.Transform()
AGG_TRANSPARENT = celiagg.SolidPaint(0, 0, 0, 0)
def write_xy_positions(filename, positions):
position_lines = ['{}\t{}'.format(x, y) for x, y in positions]
with open(filename, 'w') as f:
f.write('\n'.join(position_lines))
def save_centerline(metadata, centerline_file):
spine_tck = metadata['spine_tck']
positions = interpolate.spline_interpolate(spine_tck, 50)
write_xy_positions(centerline_file, positions)
def save_landmarks(metadata, landmark_file):
spine_tck = metadata['spine_tck']
vulva_t = metadata['vulva_t']
