Steve Chaplin and others
This backend depends on cairocffi or pycairo.
alias of matplotlib.backends.backend_cairo.FigureCanvasCairo
Bases: matplotlib.backend_bases.FigureCanvasBase
Bases: matplotlib.backend_bases.GraphicsContextBase
Return a tuple of three or four floats from 0-1.
Restore the graphics context from the stack - needed only for backends that save graphics contexts on a stack.
Set the alpha value used for blending - not supported on all backends.
If alpha=None
(the default), the alpha components of the foreground and fill colors will be used to set their respective transparencies (where applicable); otherwise, alpha
will override them.
Set whether object should be drawn with antialiased rendering.
Set how to draw endpoints of lines.
CapStyle
or {'butt', 'projecting', 'round'}
Set the clip path to a TransformedPath
or None.
Set the dash style for the gc.
The offset (usually 0).
The on-off sequence as points. None specifies a solid line.
See p. 107 of to PostScript blue book for more info.
Set the foreground color.
If fg is known to be an (r, g, b, a)
tuple, isRGBA can be set to True to improve performance.
Set how to draw connections between line segments.
JoinStyle
or {'miter', 'round', 'bevel'}
Set the linewidth in points.
Bases: matplotlib.backend_bases.RendererBase
Draw an RGBA image.
GraphicsContextBase
A graphics context with clipping information.
The distance in physical units (i.e., dots or pixels) from the left hand side of the canvas.
The distance in physical units (i.e., dots or pixels) from the bottom side of the canvas.
An array of RGBA pixels.
matplotlib.transforms.Affine2DBase
If and only if the concrete backend is written such that option_scale_image()
returns True
, an affine transformation (i.e., an Affine2DBase
) may be passed to draw_image()
. The translation vector of the transformation is given in physical units (i.e., dots or pixels). Note that the transformation does not override x and y, and has to be applied before translating the result by x and y (this can be accomplished by adding x and y to the translation vector defined by transform).
Draw a marker at each of path's vertices (excluding control points).
This provides a fallback implementation of draw_markers that makes multiple calls to draw_path()
. Some backends may want to override this method in order to draw the marker only once and reuse it multiple times.
GraphicsContextBase
The graphics context.
matplotlib.transforms.Transform
An affine transform applied to the marker.
matplotlib.transforms.Transform
An affine transform applied to the path.
Draw a Path
instance using the given affine transform.
Draw the text instance.
GraphicsContextBase
The graphics context.
The x location of the text in display coords.
The y location of the text baseline in display coords.
The text string.
matplotlib.font_manager.FontProperties
The font properties.
The rotation angle in degrees anti-clockwise.
matplotlib.text.Text
The original text object to be rendered.
Note for backend implementers:
When you are trying to determine if you have gotten your bounding box right (which is what enables the text layout/alignment to work properly), it helps to change the line in text.py:
if 0: bbox_artist(self, renderer)
to if 1, and then the actual bounding box will be plotted along with your text.
Return the canvas width and height in display coords.
Get the width, height, and descent (offset from the bottom to the baseline), in display coords, of the string s with FontProperties
prop.
Return an instance of a GraphicsContextBase
.
Convert points to display units.
You need to override this function (unless your backend doesn't have a dpi, e.g., postscript or svg). Some imaging systems assume some value for pixels per inch:
points to pixels = points * pixels_per_inch/72 * dpi/72
a float or a numpy array of float
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Licensed under the Matplotlib License Agreement.
https://matplotlib.org/3.5.1/api/backend_cairo_api.html