Author: | Steve Chaplin and others |
---|
This backend depends on cairocffi or pycairo.
class matplotlib.backends.backend_cairo.ArrayWrapper(**kwargs)
[source]
Bases: object
[Deprecated] Thin wrapper around numpy ndarray to expose the interface expected by cairocffi. Basically replicates the array.array interface.
Deprecated since version 3.0.
buffer_info(self)
[source]
matplotlib.backends.backend_cairo.FigureCanvas
alias of matplotlib.backends.backend_cairo.FigureCanvasCairo
class matplotlib.backends.backend_cairo.FigureCanvasCairo(figure)
[source]
Bases: matplotlib.backend_bases.FigureCanvasBase
print_pdf(self, fobj, *args, **kwargs)
[source]
print_png(self, fobj, *args, **kwargs)
[source]
print_ps(self, fobj, *args, **kwargs)
[source]
print_raw(self, fobj, *args, **kwargs)
print_rgba(self, fobj, *args, **kwargs)
[source]
print_svg(self, fobj, *args, **kwargs)
[source]
print_svgz(self, fobj, *args, **kwargs)
[source]
supports_blit = False
class matplotlib.backends.backend_cairo.GraphicsContextCairo(renderer)
[source]
Bases: matplotlib.backend_bases.GraphicsContextBase
get_rgb(self)
[source]
Return a tuple of three or four floats from 0-1.
restore(self)
[source]
Restore the graphics context from the stack - needed only for backends that save graphics contexts on a stack.
set_alpha(self, alpha)
[source]
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_capstyle(self, cs)
[source]
Set the capstyle to be one of ('butt', 'round', 'projecting').
set_clip_path(self, path)
[source]
Set the clip path and transformation. Path should be a TransformedPath
instance.
set_clip_rectangle(self, rectangle)
[source]
Set the clip rectangle with sequence (left, bottom, width, height)
set_dashes(self, offset, dashes)
[source]
Set the dash style for the gc.
Parameters: |
|
---|
set_foreground(self, fg, isRGBA=None)
[source]
Set the foreground color.
Parameters: |
|
---|
set_joinstyle(self, js)
[source]
Set the join style to be one of ('miter', 'round', 'bevel').
set_linewidth(self, w)
[source]
Set the linewidth in points.
class matplotlib.backends.backend_cairo.RendererCairo(dpi)
[source]
Bases: matplotlib.backend_bases.RendererBase
static convert_path(ctx, path, transform, clip=None)
[source]
[Deprecated]
Deprecated since version 3.0:
draw_image(self, gc, x, y, im)
[source]
Draw an RGBA image.
Parameters: |
|
---|
draw_markers(self, gc, marker_path, marker_trans, path, transform, rgbFace=None)
[source]
Draws a marker at each of the vertices in path. This includes all vertices, including control points on curves. To avoid that behavior, those vertices should be removed before calling this function.
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.
Parameters: |
|
---|
draw_path(self, gc, path, transform, rgbFace=None)
[source]
Draws a Path
instance using the given affine transform.
draw_text(self, gc, x, y, s, prop, angle, ismath=False, mtext=None)
[source]
Draw the text instance.
Parameters: |
|
---|
backend implementers note
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.
fontangles = {'italic': <MyCairoCffi name='mock.FONT_SLANT_ITALIC' id='140190097671840'>, 'normal': <MyCairoCffi name='mock.FONT_SLANT_NORMAL' id='140190097684352'>, 'oblique': <MyCairoCffi name='mock.FONT_SLANT_OBLIQUE' id='140190097696864'>}
fontweights = {100: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 200: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 300: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 400: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 500: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 600: <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>, 700: <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>, 800: <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>, 900: <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>, 'ultralight': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 'light': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 'normal': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 'medium': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 'regular': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140190097638624'>, 'semibold': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>, 'bold': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>, 'heavy': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>, 'ultrabold': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>, 'black': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140190097655232'>}
get_canvas_width_height(self)
[source]
Return the canvas width and height in display coords.
get_text_width_height_descent(self, s, prop, ismath)
[source]
Get the width, height, and descent (offset from the bottom to the baseline), in display coords, of the string s with FontProperties
prop
new_gc(self)
[source]
Return an instance of a GraphicsContextBase
.
points_to_pixels(self, points)
[source]
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/72.0 * dpi/72.0
Parameters: |
|
---|---|
Returns: |
|
set_ctx_from_surface(self, surface)
[source]
set_width_height(self, width, height)
[source]
© 2012–2018 Matplotlib Development Team. All rights reserved.
Licensed under the Matplotlib License Agreement.
https://matplotlib.org/3.1.1/api/backend_cairo_api.html