def __init__(self, filename, entity, options):
self.color = (0, 0, 0)
self.factor = 1
self.background_color = (0, 0, 0)
self.analyse_options(options)
self.surface = cairo.SVGSurface(filename, 10, 10)
self.context = cairo.Context(self.surface)
self.factor = 1
self.height = self.compute_height(entity)
self.width = self.compute_width(entity)
self.line_length = default_line_length
self.surface = cairo.PDFSurface(
filename, self.width + self.line_length * 2 + bbox_w_margin * 2, self.height + bbox_h_margin * 2)
self.context = cairo.Context(self.surface)
self.compute_wire_length(entity)
if options.format.lower() == "svg":
self.factor = 1
self.surface = cairo.SVGSurface(
filename, self.width + self.line_length * 2 + bbox_w_margin * 2, self.height + bbox_h_margin * 2)
if options.format.lower() == "pdf":
self.factor = 1
self.surface = cairo.PDFSurface(
filename, self.width + self.line_length * 2 + bbox_w_margin * 2, self.height + bbox_h_margin * 2)
if options.format.lower() == "ps":
self.factor = 1
self.surface = cairo.PSSurface(
filename, self.width + self.line_length * 2 + bbox_w_margin * 2, self.height + bbox_h_margin * 2)
if options.format.lower() == "png":
self.factor = float(
options.width / (self.width + self.factor * self.line_length * 2 + self.factor * bbox_w_margin * 2))
stride = cairo.ImageSurface.format_stride_for_width(
cairo.FORMAT_ARGB32, 10000)
data = bytearray(stride * 10000)
# stride = cairo.ImageSurface.format_stride_for_width(cairo.FORMAT_ARGB32, int(self.width)+1)
# data = bytearray(stride * int(self.height))
self.surface = cairo.ImageSurface(
cairo.FORMAT_ARGB32,
int(self.factor * self.width + self.factor *
self.line_length * 2 + self.factor * bbox_w_margin * 2),
int(self.factor * self.height + self.factor * bbox_h_margin * 2), data, stride)
self.context = cairo.Context(self.surface)
self.draw_background(self.context)
self.draw_entity(entity)
self.surface.write_to_png(options.filename)
def genSVG(height, width):
"""Outputs a .SVG file of the mapped hex tiles"""
surface = cairo.SVGSurface("outputs/latest.svg", width, height)
surface.set_document_unit(cairo.SVG_UNIT_MM)
ctxt = cairo.Context(surface)
ctxt.translate(10, 10)
def drawHex(point, hexHeight, colours):
verts = [(point[0], point[1] + hexHeight / 2),
(point[0] + math.sqrt(3) * hexHeight / 4,
point[1] + hexHeight / 4),
(point[0] + math.sqrt(3) * hexHeight / 4,
point[1] - hexHeight / 4),
(point[0], point[1] - hexHeight / 2),
(point[0] - math.sqrt(3) * hexHeight / 4,
point[1] - hexHeight / 4),
(point[0] - math.sqrt(3) * hexHeight / 4,
point[1] + hexHeight / 4)]
for coord in verts:
ctxt.line_to(coord[0], coord[1])
ctxt.close_path()
ctxt.set_source_rgb(0, 0, 0)
ctxt.set_line_width(1)
ctxt.stroke_preserve()
ctxt.set_source_rgb(*colours[point[2]])
ctxt.fill()
return drawHex
def output_file(ctx):
root, extension = os.path.splitext(target)
if file_number:
filename = '%s_%04d%s' % (root, file_number, extension)
else:
filename = target
extension = extension.lower()
if extension == '.png':
surface = ctx.get_target()
surface.write_to_png(target)
elif extension == '.pdf':
target_ctx = cairo.Context(
cairo.PDFSurface(filename, *self.size_or_default()))
target_ctx.set_source_surface(ctx.get_target())
target_ctx.paint()
elif extension in ('.ps', '.eps'):
target_ctx = cairo.Context(
cairo.PSSurface(filename, *self.size_or_default()))
if extension == '.eps':
target_ctx.set_eps(extension='.eps')
target_ctx.set_source_surface(ctx.get_target())
target_ctx.paint()
elif extension == '.svg':
target_ctx = cairo.Context(
cairo.SVGSurface(filename, *self.size_or_default()))
target_ctx.set_source_surface(ctx.get_target())
target_ctx.paint()
return filename
def draw_on_coxeter_plane(
P, nodes1, nodes2, svgpath=None, image_size=600, linewidth=0.0012, markersize=0.015
):
"""
Project the vertices of a polytope `P` to its Coxeter plane
and draw the pattern to a svg image.
The most important parameters are `nodes1` and `nodes2`, they
can be of lists/tuples/sets type and must partition the Coxeter
diagram of `P` into two disjoint sets such that the nodes in
each set are mutually orthogonal with each other.
"""
P.build_geometry()
M = P.mirrors
C = np.dot(M, M.T) # Cartan matrix
eigenvals, eigenvecs = np.linalg.eigh(C)
# get the eigenvector with largest (or smallest) eigenvalue
v = eigenvecs[:, 0]
# a basis of the Coxeter plane
mu_a = np.sum([v[i] * M[i] for i in nodes1], axis=0)
mu_b = np.sum([v[j] * M[j] for j in nodes2], axis=0)
# make them orthogonal
mu_a = helpers.normalize(mu_a)
mu_b -= np.dot(mu_b, mu_a) * mu_a
mu_b = helpers.normalize(mu_b)
vertices_2d = [(np.dot(mu_a, x), np.dot(mu_b, x)) for x in P.vertices_coords]
# draw on image
if svgpath is None:
svgpath = P.__class__.__name__ + ".svg"
extent = 0.99
surface = cairo.SVGSurface(svgpath, image_size, image_size)
ctx = cairo.Context(surface)
ctx.scale(image_size / (extent * 2.0), -image_size / (extent * 2.0))
ctx.translate(extent, -extent)
ctx.set_source_rgb(1, 1, 1)
ctx.paint()
ctx.set_line_width(linewidth)
# draw edges
for elist in P.edge_indices:
for i, j in elist:
x1, y1 = vertices_2d[i]
x2, y2 = vertices_2d[j]
ctx.set_source_rgb(0, 0, 0)
ctx.set_line_width(linewidth)
ctx.move_to(x1, y1)
ctx.line_to(x2, y2)
ctx.stroke()
# draw the vertices as circles
ctx.set_line_width(linewidth * 2)
for x, y in vertices_2d:
ctx.arc(x, y, markersize, 0, 2 * np.pi)
ctx.set_source_rgb(1, 0, 0)
ctx.fill_preserve()
ctx.set_source_rgb(0, 0, 0)
ctx.stroke()
surface.finish()
def _make_vector_surface(self, output_path, image_format, image_width, crop_margin):
"""
Make a vector surface in the appropriate format and with the
appropriate size depending on whether or not there is a crop margin.
In a vector image, 1 screen pixel is scaled to a certain number of
points, such that the figure as a whole will conform to a certain
physical size.
"""
if crop_margin is None:
scale = image_width / self.screen_width
image_height = self.screen_height * scale
else:
crop_margin = _mm_to_pts(crop_margin)
if crop_margin > image_width / 3:
raise ValueError(
"The crop margin set on this image is too large for the image width. Increase the image width or decrease the crop margin."
)
scale = (image_width - crop_margin * 2) / (
self._block_extents[2] - self._block_extents[0]
)
image_height = (
self._block_extents[3] - self._block_extents[1]
) * scale + crop_margin * 2
if image_format == "PDF":
surface = _cairo.PDFSurface(output_path, image_width, image_height)
surface.set_metadata(_cairo.PDF_METADATA_CREATOR, f"eyekit {__version__}")
elif image_format == "EPS":
surface = _cairo.PSSurface(output_path, image_width, image_height)
surface.set_eps(True)
elif image_format == "SVG":
surface = _cairo.SVGSurface(output_path, image_width, image_height)
surface.set_device_scale(scale, scale)
return surface, scale, crop_margin
def __init__(
self,
image=None, # PIL image
size=None,
ctx=None,
imageType=None, # determines file type
fileName=None, # if set determines output file name
):
"""
Canvas can be used in four modes:
1) using the supplied PIL image
2) using the supplied cairo context ctx
3) writing to a file fileName with image type imageType
4) creating a cairo surface and context within the constructor
"""
self.image = None
self.imageType = imageType
if image is not None:
try:
imgd = getattr(image, 'tobytes', image.tostring)("raw", "BGRA")
except SystemError:
r, g, b, a = image.split()
mrg = Image.merge("RGBA", (b, g, r, a))
imgd = getattr(mrg, 'tobytes', mrg.tostring)("raw", "RGBA")
a = array.array('B', imgd)
stride = image.size[0] * 4
surface = cairo.ImageSurface.create_for_data(
a, cairo.FORMAT_ARGB32, image.size[0], image.size[1], stride)
ctx = cairo.Context(surface)
size = image.size[0], image.size[1]
self.image = image
elif ctx is None and size is not None:
if hasattr(cairo, "PDFSurface") and imageType == "pdf":
surface = cairo.PDFSurface(fileName, size[0], size[1])
elif hasattr(cairo, "SVGSurface") and imageType == "svg":
surface = cairo.SVGSurface(fileName, size[0], size[1])
elif hasattr(cairo, "PSSurface") and imageType == "ps":
surface = cairo.PSSurface(fileName, size[0], size[1])
elif imageType == "png":
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, size[0],
size[1])
else:
raise ValueError(
"Unrecognized file type. Valid choices are pdf, svg, ps, and png"
)
ctx = cairo.Context(surface)
ctx.set_source_rgb(1, 1, 1)
ctx.paint()
else:
surface = ctx.get_target()
if size is None:
try:
size = surface.get_width(), surface.get_height()
except AttributeError:
size = None
self.ctx = ctx
self.size = size
self.surface = surface
self.fileName = fileName
def fileformat(filename, width, height):
''' figure out the output image format
Args:
filename: output filename, which will raise an error if it does not end
in one of '.pdf', '.png', '.ps', or '.svg'
width: width of the output image, in pixels
height: height of the output image, in pixels
Returns:
tuple of cairo.Surface and filetype string e.g. 'pdf' or 'png'
'''
if filename is not None:
_, ext = os.path.splitext(filename)
if not ext:
ext = '.png'
ext = ext[1:].lower()
else:
ext = None
assert ext in ['png', 'pdf', 'ps', 'svg', None], 'unknown format: .{}'.format(ext)
if ext == 'pdf':
surface = cairo.PDFSurface(filename, width, height)
elif ext == 'svg':
surface = cairo.SVGSurface(filename, width, height)
elif ext == 'ps':
surface = cairo.PSSurface(filename, width, height)
else:
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
return ext, surface
def __init__(self,
path: Path,
surface_type: str,
width: float,
height: float,
scale: float = 1):
self.width = width
self.height = height
self.scale = scale
self.path_as_posix = path.as_posix()
if surface_type == 'pdf':
surface = cairo.PDFSurface(self.path_as_posix, width, height)
elif surface_type == 'svg':
surface = cairo.SVGSurface(self.path_as_posix, width, height)
elif surface_type == 'png':
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, int(width),
int(height))
else:
raise Exception('Unexpected Format: %s' % surface_type)
context = cairo.Context(surface)
self.surface = surface
self.context = context
if isinstance(self.surface, cairo.ImageSurface):
self.context.scale(
CanvasUnit.from_pt(1).px * self.scale,
CanvasUnit.from_pt(1).px * self.scale)
def create_new_surface(file_format, target=None, width=1024, height=768):
"""
Create a new surface of the specified `file_format`:
"png" for :class:`ImageSurface`
"svg" for :class:`SVGSurface`
"pdf" for :class:`PDFSurface`
"ps" for :class:`PSSurface`
The surface will be written to the `target` parameter , which can be a
path to save the surface to, or file-like object with a `write()` method.
You can also optionally specify the `width` and `height` of the generated
surface if you know what it is; otherwise a default size of 1024 by 768 is
used.
"""
file_format = file_format.lower()
if file_format == 'png':
surface = cairo.ImageSurface(
cairo.FORMAT_ARGB32, int(width), int(height))
elif file_format == 'svg':
surface = cairo.SVGSurface(target, width, height)
elif file_format == 'pdf':
surface = cairo.PDFSurface(target, width, height)
elif file_format == 'ps':
surface = cairo.PSSurface(target, width, height)
else:
raise ValueError(
'Invalid value "{0}" for type parameter; valid values are "png", "svg", "pdf", and "ps".'.format(type))
return surface
def show(self, format='png', as_data=False):
'''Returns an Image object of the current surface. Used for displaying
output in Jupyter notebooks. Adapted from the cairo-jupyter project.'''
import cairocffi as cairo
from io import BytesIO
b = BytesIO()
if format == 'png':
from IPython.display import Image
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, self.WIDTH,
self.HEIGHT)
self.snapshot(surface)
surface.write_to_png(b)
b.seek(0)
data = b.read()
if as_data:
return data
else:
return Image(data)
elif format == 'svg':
from IPython.display import SVG
surface = cairo.SVGSurface(b, self.WIDTH, self.HEIGHT)
surface.finish()
b.seek(0)
data = b.read()
if as_data:
return data
else:
return SVG(data)
def render_as_svg(self, output):
paths = []
for simplice in self.tri.simplices:
for i, _ in enumerate(simplice):
paths.append([simplice[i - 1], simplice[i]])
# Filtering list for repeated paths
paths = self.filter_path_list(paths)
fo = open(output, 'wb')
surface_svg = cairo.SVGSurface(fo, self.image.width, self.image.height)
context = cairo.Context(surface_svg)
context.set_line_cap(cairo.LINE_CAP_ROUND)
context.set_line_join(cairo.LINE_JOIN_ROUND)
context.set_line_width(0.5)
with context:
context.set_source_rgb(1, 1, 1)
context.paint()
# Finally drawing paths
for path in paths:
x, y = self.tri.points[path[0]]
context.move_to(x, y)
x, y = self.tri.points[path[1]]
context.line_to(x, y)
context.stroke()
surface_svg.finish()
def _save(self, fo, fmt, **kwargs):
# save PDF/PS/SVG
orientation = kwargs.get('orientation', 'portrait')
dpi = 72
self.figure.dpi = dpi
w_in, h_in = self.figure.get_size_inches()
width_in_points, height_in_points = w_in * dpi, h_in * dpi
if orientation == 'landscape':
width_in_points, height_in_points = (
height_in_points, width_in_points)
if fmt == 'ps':
if not hasattr(cairo, 'PSSurface'):
raise RuntimeError('cairo has not been compiled with PS '
'support enabled')
surface = cairo.PSSurface(fo, width_in_points, height_in_points)
elif fmt == 'pdf':
if not hasattr(cairo, 'PDFSurface'):
raise RuntimeError('cairo has not been compiled with PDF '
'support enabled')
surface = cairo.PDFSurface(fo, width_in_points, height_in_points)
elif fmt in ('svg', 'svgz'):
if not hasattr(cairo, 'SVGSurface'):
raise RuntimeError('cairo has not been compiled with SVG '
'support enabled')
if fmt == 'svgz':
if isinstance(fo, six.string_types):
fo = gzip.GzipFile(fo, 'wb')
else:
fo = gzip.GzipFile(None, 'wb', fileobj=fo)
surface = cairo.SVGSurface(fo, width_in_points, height_in_points)
else:
warnings.warn("unknown format: %s" % fmt)
return
# surface.set_dpi() can be used
renderer = RendererCairo(self.figure.dpi)
renderer.set_width_height(width_in_points, height_in_points)
renderer.set_ctx_from_surface(surface)
ctx = renderer.gc.ctx
if orientation == 'landscape':
ctx.rotate(np.pi/2)
ctx.translate(0, -height_in_points)
# cairo/src/cairo_ps_surface.c
# '%%Orientation: Portrait' is always written to the file header
# '%%Orientation: Landscape' would possibly cause problems
# since some printers would rotate again ?
# TODO:
# add portrait/landscape checkbox to FileChooser
self.figure.draw(renderer)
ctx.show_page()
surface.finish()
if fmt == 'svgz':
fo.close()
def __enter__(msk):
size_in_pixels = self.size_in_pixels
msk.surface = cairo.SVGSurface(None, size_in_pixels[0],
size_in_pixels[1])
msk.ctx = cairo.Context(msk.surface)
msk.ctx.translate(-self.origin_in_pixels[0],
-self.origin_in_pixels[1])
return msk
def draw_page(bot_clip,
top_clip,
ds,
ms_values,
scale,
formations,
legend=None,
filename=None,
current_data=None,
annotation=None):
global last_glc_height, log_settings
last_glc_height = None
height = top_clip - bot_clip
top_margin = 24
bot_margin = 5
total_height_pt = scale * height + top_margin + bot_margin
if filename is None:
filename = 'output/ffq%04d' % bot_clip
if log_settings.pdf_output:
surface = cairo.PDFSurface(filename + '.pdf', mm_to_pt(160),
total_height_pt)
else:
surface = cairo.SVGSurface(filename + '.svg', mm_to_pt(160),
total_height_pt)
ctx = cairo.Context(surface)
ctx.select_font_face(log_settings.font_name)
if annotation is not None:
draw_annotation(ctx, 20, annotation[0], annotation[1])
draw_magsus(ctx, height + top_margin / scale, bot_clip, top_clip, scale,
bot_clip, ms_values)
for i in range(0, len(ds)):
if i > 0:
above = ds[i - 1]
else:
above = None
d = ds[i]
if d.bot >= bot_clip and d.bot + d.thick <= top_clip:
ds[i].draw(height + top_margin / scale, ctx, scale, above,
bot_clip)
draw_axis(height + top_margin / scale, ctx, 0., height, 100., scale,
bot_clip)
draw_header(ctx, top_margin - 10)
if log_settings.decs_incs_list is not None:
draw_decsincs_graph(ctx, height + top_margin / scale, bot_clip,
top_clip, scale, bot_clip)
for (name, bot, top) in formations:
draw_formation(ctx, height + top_margin / scale, bot_clip, top_clip,
scale, bot_clip, name, bot, top)
if current_data is not None:
page, currents = current_data
draw_currents(ctx, 400, page, currents)
if legend is not None:
draw_legend(ctx, *legend)
surface.finish()
def textwidth(self, text, config):
"""Calculates the width of the specified text.
"""
surface = cairo.SVGSurface(None, 1280, 200)
ctx = cairo.Context(surface)
ctx.select_font_face(config['font_face'], cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_BOLD)
ctx.set_font_size(int(config['font_size']))
return ctx.text_extents(text)[2] + 2
def __init__(self, filename, width=600, height=600):
# We expect the object to be in normalized screen space
self.width, self.height = width, height
self.surface = cairo.SVGSurface(filename, width, height)
self.cr = cairo.Context(self.surface)
self.cr.translate(width / 2, height / 2)
self.cr.scale(1, -1)
self.cr.translate(-width / 2, -height / 2)
def set_bounds(self, bounds):
origin_in_inch = (bounds[0][0], bounds[1][0])
size_in_inch = (abs(bounds[0][1] - bounds[0][0]), abs(bounds[1][1] - bounds[1][0]))
size_in_pixels = map(mul, size_in_inch, self.scale)
self.origin_in_pixels = tuple(map(mul, origin_in_inch, self.scale)) if self.origin_in_pixels is None else self.origin_in_pixels
self.size_in_pixels = size_in_pixels if self.size_in_pixels is None else self.size_in_pixels
if self.surface is None:
self.surface_buffer = tempfile.NamedTemporaryFile()
self.surface = cairo.SVGSurface(self.surface_buffer, size_in_pixels[0], size_in_pixels[1])
self.ctx = cairo.Context(self.surface)
self.ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
self.ctx.scale(1, -1)
self.ctx.translate(-(origin_in_inch[0] * self.scale[0]), (-origin_in_inch[1]*self.scale[0]) - size_in_pixels[1])
self.mask = cairo.SVGSurface(None, size_in_pixels[0], size_in_pixels[1])
self.mask_ctx = cairo.Context(self.mask)
self.mask_ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
self.mask_ctx.scale(1, -1)
self.mask_ctx.translate(-(origin_in_inch[0] * self.scale[0]), (-origin_in_inch[1]*self.scale[0]) - size_in_pixels[1])
def Surface(NAME, TYPE, Size):
# NAME: Song Name (with page#?)
# TYPE: {PDF, SVG}
# Size: {A3, A4, B4, B3}
if TYPE == 'PDF':
return cairo.Context(cairo.PDFSurface(NAME + '.pdf', Size[0], Size[1]))
elif TYPE == 'SVG':
return cairo.Context(cairo.SVGSurface(NAME + '.svg', Size[0], Size[1]))
def draw_surface(fasta_dict, num_motifs):
num_genes = len(fasta_dict)
# width is length of longest sequence plus 100 (for some extra white space)
WIDTH = len(sorted(fasta_dict.values(), key=len)[-1]) + 100
# height is the y_offset * number of genes
HEIGHT = 100 * num_genes + 20 * num_motifs
surface = cairo.SVGSurface("plot.svg", WIDTH, HEIGHT)
context = cairo.Context(surface)
return (context)
def _save(self, fo, fmt, **kwargs):
# save PDF/PS/SVG
orientation = kwargs.get('orientation', 'portrait')
dpi = 72
self.figure.dpi = dpi
w_in, h_in = self.figure.get_size_inches()
width_in_points, height_in_points = w_in * dpi, h_in * dpi
if orientation == 'landscape':
width_in_points, height_in_points = (height_in_points,
width_in_points)
if fmt == 'ps':
if not hasattr(cairo, 'PSSurface'):
raise RuntimeError('cairo has not been compiled with PS '
'support enabled')
surface = cairo.PSSurface(fo, width_in_points, height_in_points)
elif fmt == 'pdf':
if not hasattr(cairo, 'PDFSurface'):
raise RuntimeError('cairo has not been compiled with PDF '
'support enabled')
surface = cairo.PDFSurface(fo, width_in_points, height_in_points)
elif fmt in ('svg', 'svgz'):
if not hasattr(cairo, 'SVGSurface'):
raise RuntimeError('cairo has not been compiled with SVG '
'support enabled')
if fmt == 'svgz':
if isinstance(fo, str):
fo = gzip.GzipFile(fo, 'wb')
else:
fo = gzip.GzipFile(None, 'wb', fileobj=fo)
surface = cairo.SVGSurface(fo, width_in_points, height_in_points)
else:
warnings.warn("unknown format: %s" % fmt, stacklevel=2)
return
# surface.set_dpi() can be used
renderer = RendererCairo(self.figure.dpi)
renderer.set_width_height(width_in_points, height_in_points)
renderer.set_ctx_from_surface(surface)
ctx = renderer.gc.ctx
if orientation == 'landscape':
ctx.rotate(np.pi / 2)
ctx.translate(0, -height_in_points)
# Perhaps add an '%%Orientation: Landscape' comment?
self.figure.draw(renderer)
ctx.show_page()
surface.finish()
if fmt == 'svgz':
fo.close()
def __init__(self,
img_format="png",
output="page",
width=0.15,
height=0.15,
dots_per_inch=dots_per_inch):
"""
A thin wrapper to produce vector graphics using cairo. This class represents a page / image file we are going
to draw onto.
:param img_format:
The image format we are to produce.
:type img_format:
str
:param output:
The filename of the image file we are to produce, without a file type suffix
:type output:
str
:param width:
The width of the page, metres
:type width:
float
:param height:
The height of the page, metres
:type height:
float
:param dots_per_inch:
The dots per inch resolution to render this page
:type dots_per_inch:
float
"""
# PDF surfaces are always measured in points
if img_format in ("pdf", "svg"):
dots_per_inch = 72.
self.format = img_format
self.output = "{}.{}".format(output, img_format)
self.dots_per_metre = dots_per_inch * 39.370079
self.width = int(width * self.dots_per_metre)
self.height = int(height * self.dots_per_metre)
if self.format == "pdf":
self.surface = cairo.PDFSurface(self.output, self.width,
self.height)
elif self.format == "png":
self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, self.width,
self.height)
elif self.format == "svg":
self.surface = cairo.SVGSurface(self.output, self.width,
self.height)
else:
assert False, "Unknown image output format {}".format(self.format)
def create_rcontext(self, size, frame):
"""
Called when CairoCanvas needs a cairo context to draw on
"""
if self.format == 'pdf':
surface = cairo.PDFSurface(self._output_file(frame), *size)
elif self.format in ('ps', 'eps'):
surface = cairo.PSSurface(self._output_file(frame), *size)
elif self.format == 'svg':
surface = cairo.SVGSurface(self._output_file(frame), *size)
else:
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, *size)
return cairo.Context(surface)
def text2svg(self):
"""Internally used function.
Convert the text to SVG using Pango
"""
size = self.size * 10
line_spacing = self.line_spacing * 10
dir_name = config.get_dir("text_dir")
disable_liga = self.disable_ligatures
if not os.path.exists(dir_name):
os.makedirs(dir_name)
hash_name = self.text2hash()
file_name = os.path.join(dir_name, hash_name) + ".svg"
if os.path.exists(file_name):
return file_name
surface = cairocffi.SVGSurface(file_name, 600, 400)
context = cairocffi.Context(surface)
context.move_to(START_X, START_Y)
settings = self.text2settings()
offset_x = 0
last_line_num = 0
layout = pangocairocffi.create_layout(context)
layout.set_width(pangocffi.units_from_double(600))
for setting in settings:
family = setting.font
style = self.str2style(setting.slant)
weight = self.str2weight(setting.weight)
text = self.text[setting.start : setting.end].replace("\n", " ")
fontdesc = pangocffi.FontDescription()
fontdesc.set_size(pangocffi.units_from_double(size))
if family:
fontdesc.set_family(family)
fontdesc.set_style(style)
fontdesc.set_weight(weight)
layout.set_font_description(fontdesc)
if setting.line_num != last_line_num:
offset_x = 0
last_line_num = setting.line_num
context.move_to(
START_X + offset_x, START_Y + line_spacing * setting.line_num
)
pangocairocffi.update_layout(context, layout)
if disable_liga:
text = escape(text)
layout.set_markup(f"<span font_features='liga=0'>{text}</span>")
else:
layout.set_text(text)
logger.debug(f"Setting Text {text}")
pangocairocffi.show_layout(context, layout)
offset_x += pangocffi.units_to_double(layout.get_size()[0])
surface.finish()
return file_name
def _make_surface(self, output_path, figure_format, figure_width, figure_height):
"""
Make the relevant Cairo surface and context with appropriate sizing.
"""
if figure_format == "PDF":
surface = _cairo.PDFSurface(output_path, figure_width, figure_height)
surface.set_metadata(_cairo.PDF_METADATA_CREATOR, f"eyekit {__version__}")
elif figure_format == "EPS":
surface = _cairo.PSSurface(output_path, figure_width, figure_height)
surface.set_eps(True)
elif figure_format == "SVG":
surface = _cairo.SVGSurface(output_path, figure_width, figure_height)
context = _cairo.Context(surface)
return surface, context
def _get_text_dimensions(text: str, fontsize: int):
try:
import cairocffi as cairo
except ImportError:
return len(text) * fontsize, fontsize
surface = cairo.SVGSurface('undefined65761354373731713.svg', 1280, 200)
cairo_context = cairo.Context(surface)
cairo_context.select_font_face('Arial', cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_BOLD)
cairo_context.set_font_size(fontsize)
_, _, width, height, _, _ = cairo_context.text_extents(text)
# Don't forget to remove the undefined65761354373731713.svg file
os.remove("undefined65761354373731713.svg")
return width, height
def test_t2s() -> None:
size = 1
temp_pango_text = Text("Helloworld", t2s={"world": ITALIC})
surface = cairocffi.SVGSurface(filename, WIDTH, HEIGTH)
context = cairocffi.Context(surface)
context.move_to(START_X, START_Y)
layout = pangocairocffi.create_layout(context)
layout.set_width(pangocffi.units_from_double(WIDTH))
fontdesc = pangocffi.FontDescription()
fontdesc.set_size(pangocffi.units_from_double(size * 10))
layout.set_font_description(fontdesc)
layout.set_markup(
'Hello<span style="italic">world</span>') # yay, pango markup
pangocairocffi.show_layout(context, layout)
surface.finish()
assert compare_SVGObject_with_PangoText(temp_pango_text, filename)
def set_bounds(self, bounds, new_surface=False):
origin_in_inch = (bounds[0][0], bounds[1][0])
size_in_inch = (abs(bounds[0][1] - bounds[0][0]),
abs(bounds[1][1] - bounds[1][0]))
size_in_pixels = self.scale_point(size_in_inch)
self.origin_in_inch = origin_in_inch if self.origin_in_inch is None else self.origin_in_inch
self.size_in_inch = size_in_inch if self.size_in_inch is None else self.size_in_inch
self._xform_matrix = cairo.Matrix(xx=1.0,
yy=-1.0,
x0=-self.origin_in_pixels[0],
y0=self.size_in_pixels[1])
if (self.surface is None) or new_surface:
self.surface_buffer = tempfile.NamedTemporaryFile()
self.surface = cairo.SVGSurface(self.surface_buffer,
size_in_pixels[0],
size_in_pixels[1])
self.output_ctx = cairo.Context(self.surface)
def new_render_layer(self, color=None, mirror=False):
size_in_pixels = self.scale_point(self.size_in_inch)
matrix = copy.copy(self._xform_matrix)
layer = cairo.SVGSurface(None, size_in_pixels[0], size_in_pixels[1])
ctx = cairo.Context(layer)
if self.invert:
ctx.set_source_rgba(0.0, 0.0, 0.0, 1.0)
ctx.set_operator(cairo.OPERATOR_OVER)
ctx.paint()
if mirror:
matrix.xx = -1.0
matrix.x0 = self.origin_in_pixels[0] + self.size_in_pixels[0]
self.ctx = ctx
self.ctx.set_matrix(matrix)
self.active_layer = layer
self.active_matrix = matrix
def run(fn, roll=-3, pitch=40):
surface = cairo.SVGSurface(fn + ".svg", max_x, max_y)
if roll > 60:
roll = 60
elif roll < -60:
roll = -60
if pitch > 30:
pitch = 30
elif pitch < -30:
pitch = -30
cr = cairo.Context(surface)
with cr:
main(cr, roll, pitch)
surface.write_to_png(fn + ".png")
def test_rtl_text_to_svgobject() -> None:
"""Checks number of submobjects generated when directly
called using ``SVGMobject``"""
size = 1
text = RTL_TEXT.replace("\n", "")
temp_pango_text = Text(text, size=1)
surface = cairocffi.SVGSurface(filename, WIDTH, HEIGTH)
context = cairocffi.Context(surface)
context.move_to(START_X, START_Y)
layout = pangocairocffi.create_layout(context)
layout.set_width(pangocffi.units_from_double(WIDTH))
fontdesc = pangocffi.FontDescription()
fontdesc.set_size(pangocffi.units_from_double(size * 10))
layout.set_font_description(fontdesc)
layout.set_text(text)
pangocairocffi.show_layout(context, layout)
surface.finish()
assert compare_SVGObject_with_PangoText(temp_pango_text, filename)
