def _(d: Line, ctx: cairo.Context, scale: float):
ctx.save()
ctx.move_to(d.x0 * scale, d.y0 * scale)
ctx.line_to(d.x1 * scale, d.y1 * scale)
ctx.stroke()
# ctx.fill()
ctx.restore()
def export_svg(fn, paths, size, line_with=0.1, scale_factor=None):
from cairocffi import SVGSurface, Context
from .ddd import spatial_sort_2d as sort
if not scale_factor:
scale_factor = size
s = SVGSurface(fn, size, size)
c = Context(s)
c.set_line_width(0.1)
paths = sort(paths)
for path in paths:
path *= scale_factor
c.new_path()
c.move_to(*path[0,:])
for p in path[1:]:
c.line_to(*p)
c.stroke()
c.save()
def draw_elements(elements: Sequence[Element], ctx: cairo.Context,
scale: float):
ctx.save()
for element in elements:
if element.drawing is not None:
draw(element.drawing, ctx, scale)
ctx.translate(element.thickness * scale, 0)
ctx.restore()
def paint_children(self, ctx: Context):
for child in self.children:
ctx.save()
ctx.translate(*child.position(Anchor.TOP_LEFT))
ctx.rectangle(0, 0, *child.size)
ctx.clip()
child.paint(ctx)
ctx.restore()
def draw_ray_trace(r0: Sequence[float], elements: Sequence[Element],
ctx: cairo.Context, scale: float):
ctx.save()
r = r0
for element in elements:
ctx.move_to(0, r[0] * scale)
ctx.translate(element.thickness * scale, 0)
rp = element.matrix.dot(r)
ctx.line_to(0, rp[0] * scale)
ctx.stroke()
r = rp
ctx.restore()
def draw(self, ctx: Context, surface: Surface):
ctx.save()
ctx.translate(self.translate_x, self.translate_y)
ctx.rotate(self.rotation)
ctx.scale(self.width / self.svg_width, self.height / self.svg_height)
ctx.translate(-self.origin_x, -self.origin_y)
CairoSVGSurface(self.tree,
None,
96,
output_cairo=surface,
output_cairo_context=ctx)
ctx.restore()
def draw(self, context: Context):
text_path_glyph_items = self._compute_text_path_glyph_items()
for text_path_glyph_item in text_path_glyph_items:
glyph_position = text_path_glyph_item.position
glyph_rotation = text_path_glyph_item.rotation
context.save()
context.translate(glyph_position.x, glyph_position.y)
context.rotate(glyph_rotation)
show_glyph_item(context, self._layout_text,
text_path_glyph_item.glyph_item)
context.restore()
def draw(self, ctx: Context):
text_baseline = self.get_text_baseline(ctx)
default_font_max_height = ctx.get_scaled_font().extents()[0]
text_max_length = float('inf')
line_string_bottom_length = text_baseline.length
trimmed = False
while text_max_length > line_string_bottom_length:
text_max_length = ctx.text_extents(self.text)[4] / default_font_max_height * self.text_height + \
(len(self.text)-1) * self.text_spacing
if text_max_length > line_string_bottom_length:
self.text = self.text[:-1].strip()
trimmed = True
text_start_interp_pos_min = 0
text_start_interp_pos_max = line_string_bottom_length - text_max_length
if self.text_alignment == 'left':
text_start_interp_pos = self.text_alignment_offset
elif self.text_alignment == 'center':
text_start_interp_pos = line_string_bottom_length / 2 - text_max_length / 2 - self.text_alignment_offset
else:
text_start_interp_pos = line_string_bottom_length - text_max_length - self.text_alignment_offset
text_start_interp_pos = min(
text_start_interp_pos_max,
max(text_start_interp_pos_min, text_start_interp_pos))
text_interp_pos = text_start_interp_pos
for char in self.text:
char_pos_origin = text_baseline.interpolate(text_interp_pos)
char_advance_x = ctx.text_extents(
char)[4] / default_font_max_height * self.text_height
char_pos_end = text_baseline.interpolate(text_interp_pos +
char_advance_x)
ctx.save()
ctx.translate(char_pos_origin.x, char_pos_origin.y)
text_angle = math.atan2(char_pos_end.y - char_pos_origin.y,
char_pos_end.x - char_pos_origin.x)
ctx.rotate(text_angle)
ctx.scale(1 / default_font_max_height * self.text_height)
if not trimmed:
ctx.set_source_rgba(0, 0, 0, 1)
else:
ctx.set_source_rgba(0, 0, 0.2, 1)
ctx.show_text(char)
ctx.fill()
ctx.restore()
text_interp_pos += char_advance_x + self.text_spacing
def render_cluster_glyph_items(
ctx: cairocffi.Context,
layout: pangocffi.Layout
):
"""
Renders each cluster within a layout with a unique rotation and color.
Warning: Does not support bidirectional text.
:param ctx:
a Cairo context
:param layout:
a Pango layout
"""
layout_run_iter = layout.get_iter()
layout_cluster_iter = layout.get_iter()
layout_text = layout.get_text()
alternate = False
while True:
layout_run = layout_run_iter.get_run()
layout_line_baseline = layout_run_iter.get_baseline()
if layout_run is None:
if not layout_run_iter.next_run():
break
continue
clusters = get_clusters_from_glyph_item(layout_run, layout_text)
for cluster in clusters:
cluster_extents = layout_cluster_iter.get_cluster_extents()[1]
layout_cluster_iter.next_cluster()
alternate = not alternate
ctx.set_source_rgba(0.5, 0, 1 if alternate else 0.5, 0.9)
ctx.save()
ctx.translate(
pangocffi.units_to_double(cluster_extents.x),
pangocffi.units_to_double(layout_line_baseline)
)
ctx.rotate(-0.05 if alternate else 0.05)
pangocairocffi.show_glyph_item(
ctx,
layout_text,
cluster
)
ctx.restore()
if not layout_run_iter.next_run():
break
def label_train_interfaces(ctx: cairo.Context,
train: trains.Train,
radius_factors=1,
broken_spaces: Sequence = None):
spaces, brokens = break_spaces(train.spaces, broken_spaces)
radius_factors = np.broadcast_to(radius_factors, (len(train.interfaces), ))
ctx.save()
ctx.translate(0, spaces[0])
for interface, space, radius_factor in zip(train.interfaces, spaces[1:],
radius_factors):
label_interface(ctx, interface, radius_factor)
ctx.translate(0, space)
ctx.restore()
def make_train_spaces(ctx: cairo.Context,
train: trains.Train,
broken_spaces: Sequence = None,
frac: float = 1 / 4):
spaces, brokens = break_spaces(train.spaces, broken_spaces)
ctx.save()
radius = train.interfaces[
0].radius # if len(self.interfaces) > 0 else self.spaces[0]
y_next = 0
xys_last = np.asarray([[-radius, 0], [radius, 0]])
n = train.interfaces[0].n1
for space, next_interface, broken in zip(spaces,
train.interfaces + (None, ),
brokens):
ctx.set_source_rgba(*index_colors.get(n.name, (0, 0, 1, 1)))
y_next += space
# Generate next interface points.
if next_interface is None:
xys_next = np.asarray([[-radius, 0], [radius, 0]])
else:
xys_next = next_interface.get_points()
xys_next += [0, y_next]
if broken:
num = 8
n = np.arange(num + 1)
jagged = np.c_[2 * (n / num - 0.5) * radius,
(n % 2) * space * frac + y_next - space / 2]
xys = np.r_[xys_last, jagged[::-1, :] - (0, space * frac)]
draw_polyline(ctx, xys)
ctx.fill()
xys = np.r_[jagged, xys_next[::-1, :]]
draw_polyline(ctx, xys)
ctx.fill()
else:
xys = np.r_[xys_last, xys_next[::-1, :]]
draw_polyline(ctx, xys)
ctx.fill()
xys_last = xys_next
if next_interface is not None:
n = next_interface.n2
ctx.restore()
def make_train_interfaces(ctx: cairo.Context,
train: trains.Train,
broken_spaces: Sequence = None):
"""
Propagation is along positive y axis, starting from origin.
Args:
size (scalar): Full transverse dimension of interfaces.
"""
spaces, brokens = break_spaces(train.spaces, broken_spaces)
ctx.save()
ctx.translate(0, spaces[0])
for interface, space in zip(train.interfaces, spaces[1:]):
make_interface(ctx, interface)
ctx.translate(0, space)
ctx.restore()
def label_train_spaces(ctx: cairo.Context,
train: trains.Train,
radius_factors=1,
broken_spaces: Sequence = None):
"""Draw material name and thickness of the spaces.
Args:
radius_factors (scalar or sequence): Factor by which the average interface radii is multiplied to place the text. If
a scalar is given it is broadcast.
"""
spaces, brokens = break_spaces(train.spaces, broken_spaces)
radius_factors = np.broadcast_to(radius_factors, (len(spaces), ))
radius_last = train.interfaces[0].radius
y_last = 0
h_last = 0
n = train.interfaces[0].n1
for space, next_interface, radius_factor in zip(
spaces, train.interfaces + (None, ), radius_factors):
if next_interface is None:
radius_next = radius_last
h_next = 0
else:
radius_next = next_interface.radius
h_next = functions.calc_sphere_sag(next_interface.roc, radius_next)
y_next = y_last + space
if space != 0:
string = '%.3f mm %s' % (space * 1e3, n.name)
radius = (radius_last + radius_next) / 2
x = radius_factor * radius
y = (y_next + h_next + y_last + h_last) / 2
ctx.save()
ctx.translate(x, y)
ctx.show_text(string)
ctx.new_path()
ctx.restore()
if radius_factor > 1:
draw_polyline(ctx, ((radius, y), (x, y)))
ctx.stroke()
y_last = y_next
h_last = h_next
if next_interface is not None:
n = next_interface.n2
radius_last = next_interface.radius
def draw_children(self, g: Graphics) -> None:
ui = cast(ContainerUI, self.ui)
(cx, cy, cw, ch) = ui.content_bounds(self).tuple
g.save()
g.rectangle(cx, cy, cw, ch)
g.clip()
try:
# noinspection PyTypeChecker
for child in self.children:
child.draw(g)
except BaseException as e:
self.error_handler(e)
g.restore()
def draw(self, g: Graphics) -> None:
if self.visible:
g.save()
(dx,
dy) = self.parent.map(lambda p: p.location).value_or(Point(0, 0))
(cx, cy, cw, ch) = self.ui.clip_bounds(self).tuple
g.translate(dx, dy)
g.rectangle(cx, cy, cw, ch)
g.clip()
try:
self.draw_component(g)
except BaseException as e:
self.error_handler(e)
g.restore()
def __draw_sector (self: 'HueSatWheelWidget', cr: cairocffi.Context,
center_x: float, center_y: float) -> None:
cr.save ()
cr.set_line_width (1)
offset = self.rotation
for idx, sector in enumerate (self.sector[0]):
half_angle = 2 * numpy.pi * sector / 2
offset += self.sector[1][idx] * 2 * numpy.pi
cr.set_source_rgba (0, 0, 0, 1)
cr.move_to (center_x, center_y)
cr.arc (center_x, center_y, (self.size - 2) / 2.,
offset - half_angle, half_angle + offset)
cr.line_to (center_x, center_y)
cr.stroke_preserve ()
cr.set_source_rgba (0, 0, 0, 0.25)
cr.fill ()
cr.restore ()
def label_interface(ctx: cairo.Context,
face: trains.Interface,
radius_factor=1):
"""Draw text saying ROC, and a line from the edge of the interface to the text.
Args:
radius_factor (scalar): Factor by which interface radius is multiplied to get text x position.
"""
x = radius_factor * face.radius
y = functions.calc_sphere_sag(face.roc, face.radius)
string = 'ROC %.3f mm' % (face.roc * 1e3)
ctx.set_source_rgb(0, 0, 0)
ctx.save()
ctx.translate(x, y)
ctx.show_text(string)
ctx.new_path()
ctx.restore()
if radius_factor > 1:
draw_polyline(ctx, ((face.radius, y), (x, y)))
ctx.stroke()
def render_run_glyph_items(
ctx: cairocffi.Context,
layout: pangocffi.Layout
) -> None:
"""
Renders each layout run within a layout with a unique rotation and color.
:param ctx:
a Cairo context
:param layout:
a Pango layout
"""
layout_iter = layout.get_iter()
layout_text = layout.get_text()
alternate = False
while True:
layout_run = layout_iter.get_run()
layout_run_extents = layout_iter.get_run_extents()[1]
layout_line_baseline = layout_iter.get_baseline()
if layout_run is None:
if not layout_iter.next_run():
break
continue
alternate = not alternate
ctx.set_source_rgba(0, 0.5, 1 if alternate else 0.5, 0.9)
ctx.save()
ctx.translate(
pangocffi.units_to_double(layout_run_extents.x),
pangocffi.units_to_double(layout_line_baseline)
)
ctx.rotate(0.05 if alternate else -0.05)
pangocairocffi.show_glyph_item(ctx, layout_text, layout_run)
ctx.restore()
if not layout_iter.next_run():
break
def _generate_layer(self, transcription, page, layer):
surface = PDFSurface(layer, *page.page_size)
context = Context(surface)
# context.select_font_face('Georgia')
context.set_source_rgba(1, 1, 1, 1 / 256) # almost invisible
context.set_font_size(2)
for line_ink, line_transcription in zip(page.lines, transcription):
ink, transformation = writing.normalized(line_ink)
context.save()
context.transform(
Matrix(*(Transformation.translation(
0, page.page_size[1]).parameter)))
context.transform(Matrix(*(Transformation.mirror(0).parameter)))
context.transform(Matrix(*((~transformation).parameter)))
context.transform(Matrix(*(Transformation.mirror(0).parameter)))
HANDWRITING_WIDTH = ink.boundary_box[1]
TYPEWRITING_WIDTH = context.text_extents(line_transcription)[2]
context.scale(HANDWRITING_WIDTH / TYPEWRITING_WIDTH, 1)
context.move_to(0, 0)
context.show_text(line_transcription)
context.restore()
context.stroke()
context.show_page()
surface.flush()
def _(d: Arc, ctx: cairo.Context, scale: float):
ctx.save()
ctx.arc(d.xc * scale, d.yc * scale, d.radius * scale, d.theta0, d.theta1)
ctx.stroke()
ctx.restore()
def _(d: Scaling, ctx: cairo.Context, scale: float):
ctx.save()
ctx.scale(d.x, d.y)
draw(d.child, ctx, scale)
ctx.restore()
def _(d: Translation, ctx: cairo.Context, scale: float):
ctx.save()
ctx.translate(d.x * scale, d.y * scale)
draw(d.child, ctx, scale)
ctx.restore()
def ctx_scope(ctx: cairo.Context):
try:
ctx.save()
yield ctx
finally:
ctx.restore()
def __draw_ring (self: 'HueSatWheelWidget', cr: cairocffi.Context,
width: int, height: int, center_x: float, center_y: float,
outer: float, inner: float) -> None:
self.__redraw = False
stride = cairocffi.ImageSurface.format_stride_for_width (cairocffi.FORMAT_ARGB32, width)
buf = numpy.empty (int (height * stride), dtype = numpy.uint8)
for y in range (height):
idx = y * width * 4
dy = -(y - center_y)
for x in range (width):
dx = x - center_x
dist = dx * dx + dy * dy
angle = math.atan2 (dy, dx)
if angle < 0:
angle += 2 * numpy.pi
hue = angle / (2 * numpy.pi)
hue_idx = int ((angle + 2 * numpy.pi / 3) / (2 * numpy.pi) * 255)
hue_idx = hue_idx % 256
if dist < ((inner - 1) ** 2) * (1 - self.__hist[255 - hue_idx]) or \
dist > ((outer + 1) ** 2):
buf[idx + 0] = 0
buf[idx + 1] = 0
buf[idx + 2] = 0
buf[idx + 3] = 0
idx += 4
continue
r, g, b = colorsys.hsv_to_rgb (hue, 1.0, 1.0)
a = 255
buf[idx + 0] = int (math.floor (r * 255 + 0.5))
buf[idx + 1] = int (math.floor (g * 255 + 0.5))
buf[idx + 2] = int (math.floor (b * 255 + 0.5))
buf[idx + 3] = a
idx += 4
source = cairocffi.ImageSurface.create_for_data (
memoryview (buf), cairocffi.FORMAT_ARGB32, width, height, stride
)
fg_color = self.get_style_context ().get_color (Gtk.StateFlags.NORMAL)
cr.save ()
cr.set_source_rgba (0, 0, 0, 0)
cr.paint ()
cr.set_source_surface (source, 0, 0)
cr.paint ()
cr.set_line_width (1)
cr.new_path ()
cr.set_source_rgba (*list (fg_color))
cr.arc (center_x, center_y, (self.size - 4) / 2. - self.ring_width,
0, 2 * numpy.pi)
cr.stroke ()
cr.arc (center_x, center_y, (self.size - 2) / 2, 0, 2 * numpy.pi)
cr.stroke ()
cr.arc (center_x, center_y, 5, 0, 2 * numpy.pi)
cr.fill ()
cr.restore ()
def draw(self, ctx: Context, surface: Surface):
ctx.save()
ctx.translate(self.position_x, self.position_y)
ctx.scale(self.width / self.svg_width, self.height / self.svg_height)
CairoSVGSurface(self.tree, surface, ctx, 96)
ctx.restore()