matplotlib.backends.backend_pdf — Matplotlib 3.10.3 documentation (original) (raw)
A PDF Matplotlib backend.
Author: Jouni K Seppänen <jks@iki.fi> and others.
matplotlib.backends.backend_pdf.FigureCanvas[source]#
alias of FigureCanvasPdf
class matplotlib.backends.backend_pdf.FigureCanvasPdf(figure=None)[source]#
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.
filetypes = {'pdf': 'Portable Document Format'}#
fixed_dpi = 72#
get_default_filetype()[source]#
Return the default savefig file format as specified in[rcParams["savefig.format"]](../users/explain/customizing.html?highlight=savefig.format#matplotlibrc-sample) (default: 'png').
The returned string does not include a period. This method is overridden in backends that only support a single file type.
print_pdf(filename, *, bbox_inches_restore=None, metadata=None)[source]#
class matplotlib.backends.backend_pdf.GraphicsContextPdf(file)[source]#
Bases: GraphicsContextBase
alpha_cmd(alpha, forced, effective_alphas)[source]#
capstyles = {'butt': 0, 'projecting': 2, 'round': 1}#
clip_cmd(cliprect, clippath)[source]#
Set clip rectangle. Calls pop() and push().
commands = ((('_cliprect', '_clippath'), <function GraphicsContextPdf.clip_cmd>), (('_alpha', '_forced_alpha', '_effective_alphas'), <function GraphicsContextPdf.alpha_cmd>), (('_capstyle',), <function GraphicsContextPdf.capstyle_cmd>), (('_fillcolor',), <function GraphicsContextPdf.fillcolor_cmd>), (('_joinstyle',), <function GraphicsContextPdf.joinstyle_cmd>), (('_linewidth',), <function GraphicsContextPdf.linewidth_cmd>), (('_dashes',), <function GraphicsContextPdf.dash_cmd>), (('_rgb',), <function GraphicsContextPdf.rgb_cmd>), (('_hatch', '_hatch_color', '_hatch_linewidth'), <function GraphicsContextPdf.hatch_cmd>))#
copy_properties(other)[source]#
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.
hatch_cmd(hatch, hatch_color, hatch_linewidth)[source]#
joinstyles = {'bevel': 2, 'miter': 0, 'round': 1}#
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.
class matplotlib.backends.backend_pdf.Name(name)[source]#
Bases: object
PDF name object.
name#
class matplotlib.backends.backend_pdf.Op(*values)[source]#
Bases: Enum
PDF operators (not an exhaustive list).
close_fill_stroke = b'b'[source]#
concat_matrix = b'cm'[source]#
classmethod paint_path(fill, stroke)[source]#
Return the PDF operator to paint a path.
Parameters:
fillbool
Fill the path with the fill color.
strokebool
Stroke the outline of the path with the line color.
setcolor_nonstroke = b'scn'[source]#
setcolor_stroke = b'SCN'[source]#
setcolorspace_nonstroke = b'cs'[source]#
setcolorspace_stroke = b'CS'[source]#
setgray_nonstroke = b'g'[source]#
setgray_stroke = b'G'[source]#
setrgb_nonstroke = b'rg'[source]#
setrgb_stroke = b'RG'[source]#
class matplotlib.backends.backend_pdf.PdfFile(filename, metadata=None)[source]#
Bases: object
PDF file object.
Parameters:
filenamestr or path-like or file-like
Output target; if a string, a file will be opened for writing.
metadatadict from strings to strings and dates
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.
addGouraudTriangles(points, colors)[source]#
Add a Gouraud triangle shading.
Parameters:
pointsnp.ndarray
Triangle vertices, shape (n, 3, 2) where n = number of triangles, 3 = vertices, 2 = x, y.
colorsnp.ndarray
Vertex colors, shape (n, 3, 1) or (n, 3, 4) as with points, but last dimension is either (gray,) or (r, g, b, alpha).
Returns:
Name, Reference
Return name of an ExtGState that sets alpha to the given value.
beginStream(id, len, extra=None, png=None)[source]#
Flush all buffers and free all resources.
createType1Descriptor(t1font, fontfile)[source]#
Given a dvi font object, return a name suitable for Op.selectfont. This registers the font information in self.dviFontInfo if not yet registered.
embedTTF(filename, characters)[source]#
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.
hatchPattern(hatch_style)[source]#
property hatchPatterns[source]#
[_Deprecated_]
Notes
Deprecated since version 3.10:
Return name of an image XObject representing the given image.
markerObject(path, trans, fill, stroke, lw, joinstyle, capstyle)[source]#
Return name of a marker XObject representing the given path.
newPage(width, height)[source]#
newTextnote(text, positionRect=[-100, -100, 0, 0])[source]#
outputStream(ref, data, *, extra=None)[source]#
pathCollectionObject(gc, path, trans, padding, filled, stroked)[source]#
static pathOperations(path, transform, clip=None, simplify=None, sketch=None)[source]#
reserveObject(name='')[source]#
Reserve an ID for an indirect object.
The name is used for debugging in case we forget to print out the object with writeObject.
writeGouraudTriangles()[source]#
Write out the info dictionary, checking it for good form
writeObject(object, contents)[source]#
writePath(path, transform, clip=False, sketch=None)[source]#
writePathCollectionTemplates()[source]#
Write out the PDF trailer.
Write out the xref table.
class matplotlib.backends.backend_pdf.PdfPages(filename, keep_empty=, metadata=None)[source]#
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.
Parameters:
filenamestr or path-like or file-like
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).
metadatadict, optional
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.
attach_note(text, positionRect=[-100, -100, 0, 0])[source]#
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').
savefig(figure=None, **kwargs)[source]#
Save a Figure to this file as a new page.
Any other keyword arguments are passed to savefig.
Parameters:
figureFigure or int, default: the active figure
The figure, or index of the figure, that is saved to the file.
class matplotlib.backends.backend_pdf.Reference(id)[source]#
Bases: object
PDF reference object.
Use PdfFile.reserveObject() to create References.
write(contents, file)[source]#
class matplotlib.backends.backend_pdf.RendererPdf(file, image_dpi, height, width)[source]#
Bases: RendererPDFPSBase
check_gc(gc, fillcolor=None)[source]#
draw_gouraud_triangles(gc, points, colors, trans)[source]#
Draw a series of Gouraud triangles.
Parameters:
The graphics context.
triangles_array(N, 3, 2) array-like
Array of N (x, y) points for the triangles.
colors_array(N, 3, 4) array-like
Array of N RGBA colors for each point of the triangles.
transformTransform
An affine transform to apply to the points.
draw_image(gc, x, y, im, transform=None)[source]#
Draw an RGBA image.
Parameters:
A graphics context with clipping information.
xfloat
The distance in physical units (i.e., dots or pixels) from the left hand side of the canvas.
yfloat
The distance in physical units (i.e., dots or pixels) from the bottom side of the canvas.
im(N, M, 4) array of numpy.uint8
An array of RGBA pixels.
transformAffine2DBase
If and only if the concrete backend is written such thatoption_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_markers(gc, marker_path, marker_trans, path, trans, rgbFace=None)[source]#
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.
Parameters:
The graphics context.
marker_pathPath
The path for the marker.
marker_transTransform
An affine transform applied to the marker.
pathPath
The locations to draw the markers.
transTransform
An affine transform applied to the path.
rgbFacecolor, optional
draw_mathtext(gc, x, y, s, prop, angle)[source]#
draw_path(gc, path, transform, rgbFace=None)[source]#
Draw a Path instance using the given affine transform.
draw_path_collection(gc, master_transform, paths, all_transforms, offsets, offset_trans, facecolors, edgecolors, linewidths, linestyles, antialiaseds, urls, offset_position)[source]#
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, and_antialiased_ are lists that set the corresponding properties.
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_tex(gc, x, y, s, prop, angle, *, mtext=None)[source]#
Draw a TeX instance.
Parameters:
The graphics context.
xfloat
The x location of the text in display coords.
yfloat
The y location of the text baseline in display coords.
sstr
The TeX text string.
propFontProperties
The font properties.
anglefloat
The rotation angle in degrees anti-clockwise.
mtextText
The original text object to be rendered.
draw_text(gc, x, y, s, prop, angle, ismath=False, mtext=None)[source]#
Draw a text instance.
Parameters:
The graphics context.
xfloat
The x location of the text in display coords.
yfloat
The y location of the text baseline in display coords.
sstr
The text string.
propFontProperties
The font properties.
anglefloat
The rotation angle in degrees anti-clockwise.
ismathbool or "TeX"
If True, use mathtext parser.
mtextText
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.
encode_string(s, fonttype)[source]#
get_image_magnification()[source]#
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.
class matplotlib.backends.backend_pdf.Stream(id, len, file, extra=None, png=None)[source]#
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().
Parameters:
idint
Object id of the stream.
lenReference or None
An unused Reference object for the length of the stream; None means to use a memory buffer so the length can be inlined.
filePdfFile
The underlying object to write the stream to.
extradict from Name to anything, or None
Extra key-value pairs to include in the stream header.
pngdict or None
If the data is already png encoded, the decode parameters.
compressobj#
Finalize stream.
file#
id#
len#
pdfFile#
pos#
Write some data on the stream.
class matplotlib.backends.backend_pdf.Verbatim(x)[source]#
Bases: object
Store verbatim PDF command content for later inclusion in the stream.
matplotlib.backends.backend_pdf.pdfRepr(obj)[source]#
Map Python objects to PDF syntax.