matplotlib.backends.backend_pdf#
A PDF Matplotlib backend.
Author: Jouni K Seppänen <jks@iki.fi> and others.
alias of FigureCanvasPdf
Bases: FigureCanvasBase
Render the Figure.
This method must walk the artist tree, even if no output is produced, because it triggers deferred work that users may want to access before saving output to disk. For example computing limits, auto-limits, and tick values.
Return the default savefig file format as specified in rcParams["savefig.format"] (default: 'png').
The returned string does not include a period. This method is overridden in backends that only support a single file type.
Bases: GraphicsContextBase
Copy properties of other into self.
Copy properties of other into self and return PDF commands needed to transform self into other.
Predicate: does the path need to be filled?
An optional argument can be used to specify an alternative _fillcolor, as needed by RendererPdf.draw_markers.
Make sure every pushed graphics state is popped.
Return the appropriate pdf operator to cause the path to be stroked, filled, or both.
Predicate: does the path need to be stroked (its outline drawn)? This tests for the various conditions that disable stroking the path, in which case it would presumably be filled.
Bases: object
PDF name object.
Bases: Enum
PDF operators (not an exhaustive list).
Return the PDF operator to paint a path.
Fill the path with the fill color.
Stroke the outline of the path with the line color.
Bases: object
PDF file object.
Output target; if a string, a file will be opened for writing.
Information dictionary object (see PDF reference section 10.2.1 'Document Information Dictionary'), e.g.: {'Creator': 'My software', 'Author': 'Me', 'Title': 'Awesome'}.
The standard keys are 'Title', 'Author', 'Subject', 'Keywords', 'Creator', 'Producer', 'CreationDate', 'ModDate', and 'Trapped'. Values have been predefined for 'Creator', 'Producer' and 'CreationDate'. They can be removed by setting them to None.
Add a Gouraud triangle shading.
Triangle vertices, shape (n, 3, 2) where n = number of triangles, 3 = vertices, 2 = x, y.
Vertex colors, shape (n, 3, 1) or (n, 3, 4) as with points, but last dimension is either (gray,) or (r, g, b, alpha).
Return name of an ExtGState that sets alpha to the given value.
Flush all buffers and free all resources.
[Deprecated]
Notes
Deprecated since version 3.11:
Given a dvi font object, return a name suitable for Op.selectfont.
Register the font internally (in _dviFontInfo) if not yet registered.
Embed the TTF font from the named file into the document.
Write out the various deferred objects and the pdf end matter.
Select a font based on fontprop and return a name suitable for Op.selectfont. If fontprop is a string, it will be interpreted as the filename of the font.
[Deprecated]
Notes
Deprecated since version 3.11:
[Deprecated]
Notes
Deprecated since version 3.10:
Return name of an image XObject representing the given image.
Return name of a marker XObject representing the given path.
Reserve an ID for an indirect object.
The name is used for debugging in case we forget to print out the object with writeObject.
[Deprecated]
Notes
Deprecated since version 3.11:
Write out the info dictionary, checking it for good form
Write out the PDF trailer.
Write out the xref table.
Bases: object
A multi-page PDF file.
Notes
In reality PdfPages is a thin wrapper around PdfFile, in order to avoid confusion when using savefig and forgetting the format argument.
Examples
>>> import matplotlib.pyplot as plt
>>> # Initialize:
>>> with PdfPages('foo.pdf') as pdf:
... # As many times as you like, create a figure fig and save it:
... fig = plt.figure()
... pdf.savefig(fig)
... # When no figure is specified the current figure is saved
... pdf.savefig()
Create a new PdfPages object.
Plots using PdfPages.savefig will be written to a file at this location. The file is opened when a figure is saved for the first time (overwriting any older file with the same name).
Information dictionary object (see PDF reference section 10.2.1 'Document Information Dictionary'), e.g.: {'Creator': 'My software', 'Author': 'Me', 'Title': 'Awesome'}.
The standard keys are 'Title', 'Author', 'Subject', 'Keywords', 'Creator', 'Producer', 'CreationDate', 'ModDate', and 'Trapped'. Values have been predefined for 'Creator', 'Producer' and 'CreationDate'. They can be removed by setting them to None.
Add a new text note to the page to be saved next. The optional positionRect specifies the position of the new note on the page. It is outside the page per default to make sure it is invisible on printouts.
Finalize this object, making the underlying file a complete PDF file.
Return the current number of pages in the multipage pdf file.
Return a modifiable information dictionary object (see PDF reference section 10.2.1 'Document Information Dictionary').
Bases: object
PDF reference object.
Use PdfFile.reserveObject() to create References.
Bases: RendererPDFPSBase
Draw a series of Gouraud triangles.
GraphicsContextBase
The graphics context.
Array of N (x, y) points for the triangles.
Array of N RGBA colors for each point of the triangles.
Transform
An affine transform to apply to the points.
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.
numpy.uint8
An array of RGBA pixels.
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 translatingthe 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).
The base (fallback) implementation makes multiple calls to draw_path. Backends may want to override this method in order to draw the marker only once and reuse it multiple times.
GraphicsContextBase
The graphics context.
Path
The path for the marker.
Transform
An affine transform applied to the marker.
Path
The locations to draw the markers.
Transform
An affine transform applied to the path.
Draw a Path instance using the given affine transform.
Draw a collection of paths.
Each path is first transformed by the corresponding entry in all_transforms (a list of (3, 3) matrices) and then by master_transform. They are then translated by the corresponding entry in offsets, which has been first transformed by offset_trans.
facecolors, edgecolors, linewidths, linestyles, antialiased and hatchcolors are lists that set the corresponding properties.
Added in version 3.11: Allow hatchcolors to be specified.
offset_position is unused now, but the argument is kept for backwards compatibility.
The base (fallback) implementation makes multiple calls to draw_path. Backends may want to override this in order to render each set of path data only once, and then reference that path multiple times with the different offsets, colors, styles etc. The generator methods _iter_collection_raw_paths and _iter_collection are provided to help with (and standardize) the implementation across backends. It is highly recommended to use those generators, so that changes to the behavior of draw_path_collection can be made globally.
Draw a TeX 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 TeX text string.
FontProperties
The font properties.
The rotation angle in degrees anti-clockwise.
Text
The original text object to be rendered.
Draw a 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.
FontProperties
The font properties.
The rotation angle in degrees anti-clockwise.
If True, use mathtext parser.
Text
The original text object to be rendered.
Notes
Notes for backend implementers:
RendererBase.draw_text also supports passing "TeX" to the ismath parameter to use TeX rendering, but this is not required for actual rendering backends, and indeed many builtin backends do not support this. Rather, TeX rendering is provided by draw_tex.
Get the factor by which to magnify images passed to draw_image. Allows a backend to have images at a different resolution to other artists.
Return an instance of a GraphicsContextBase.
Bases: object
PDF stream object.
This has no pdfRepr method. Instead, call begin(), then output the contents of the stream by calling write(), and finally call end().
Object id of the stream.
An unused Reference object for the length of the stream; None means to use a memory buffer so the length can be inlined.
The underlying object to write the stream to.
Extra key-value pairs to include in the stream header.
If the data is already png encoded, the decode parameters.
Finalize stream.
Write some data on the stream.
Bases: object
Store verbatim PDF command content for later inclusion in the stream.
Map Python objects to PDF syntax.
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