matplotlib.backends.backend_ps
#
A PostScript backend, which can produce both PostScript .ps and .eps.
- matplotlib.backends.backend_ps.FigureCanvas[source]#
alias of
FigureCanvasPS
- class matplotlib.backends.backend_ps.FigureCanvasPS(figure=None)[source]#
Bases:
FigureCanvasBase
- draw()[source]#
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 = {'eps': 'Encapsulated Postscript', 'ps': 'Postscript'}#
- fixed_dpi = 72#
- get_default_filetype()[source]#
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.
- print_eps(outfile, *, metadata=None, papertype=None, orientation='portrait', bbox_inches_restore=None, **kwargs)#
- print_ps(outfile, *, metadata=None, papertype=None, orientation='portrait', bbox_inches_restore=None, **kwargs)#
- class matplotlib.backends.backend_ps.PsBackendHelper[source]#
Bases:
object
[Deprecated]
Notes
Deprecated since version 3.7:
- class matplotlib.backends.backend_ps.RendererPS(width, height, pswriter, imagedpi=72)[source]#
Bases:
RendererPDFPSBase
The renderer handles all the drawing primitives using a graphics context instance that controls the colors/styles.
- draw_gouraud_triangle(gc, points, colors, trans)[source]#
[Deprecated] Draw a Gouraud-shaded triangle.
- Parameters:
- gc
GraphicsContextBase
The graphics context.
- points(3, 2) array-like
Array of (x, y) points for the triangle.
- colors(3, 4) array-like
RGBA colors for each point of the triangle.
- transform
Transform
An affine transform to apply to the points.
- gc
Notes
Deprecated since version 3.7: Use draw_gouraud_triangles instead.
- draw_gouraud_triangles(gc, points, colors, trans)[source]#
Draw a series of Gouraud triangles.
- Parameters:
- gc
GraphicsContextBase
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.
- transform
Transform
An affine transform to apply to the points.
- gc
- draw_image(gc, x, y, im, transform=None)[source]#
Draw an RGBA image.
- Parameters:
- gc
GraphicsContextBase
A graphics context with clipping information.
- xscalar
The distance in physical units (i.e., dots or pixels) from the left hand side of the canvas.
- yscalar
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.
- transform
Affine2DBase
If and only if the concrete backend is written such that
option_scale_image
returnsTrue
, an affine transformation (i.e., anAffine2DBase
) may be passed todraw_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).
- gc
- 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:
- gc
GraphicsContextBase
The graphics context.
- marker_path
Path
The path for the marker.
- marker_trans
Transform
An affine transform applied to the marker.
- path
Path
The locations to draw the markers.
- trans
Transform
An affine transform applied to the path.
- rgbFacecolor, optional
- gc
- 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 ofdraw_path_collection
can be made globally.
- draw_tex(gc, x, y, s, prop, angle, *, mtext=None)[source]#
Draw a TeX instance.
- Parameters:
- gc
GraphicsContextBase
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.
- prop
FontProperties
The font properties.
- anglefloat
The rotation angle in degrees anti-clockwise.
- mtext
Text
The original text object to be rendered.
- gc
- draw_text(gc, x, y, s, prop, angle, ismath=False, mtext=None)[source]#
Draw a text instance.
- Parameters:
- gc
GraphicsContextBase
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.
- prop
FontProperties
The font properties.
- anglefloat
The rotation angle in degrees anti-clockwise.
- ismathbool or "TeX"
If True, use mathtext parser. If "TeX", use tex for rendering.
- mtext
Text
The original text object to be rendered.
- gc
Notes
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.
- matplotlib.backends.backend_ps.get_bbox_header(lbrt, rotated=False)[source]#
Return a postscript header string for the given bbox lbrt=(l, b, r, t). Optionally, return rotate command.
- matplotlib.backends.backend_ps.gs_distill(tmpfile, eps=False, ptype='letter', bbox=None, rotated=False)[source]#
Use ghostscript's pswrite or epswrite device to distill a file. This yields smaller files without illegal encapsulated postscript operators. The output is low-level, converting text to outlines.
- matplotlib.backends.backend_ps.pstoeps(tmpfile, bbox=None, rotated=False)[source]#
Convert the postscript to encapsulated postscript. The bbox of the eps file will be replaced with the given bbox argument. If None, original bbox will be used.
- matplotlib.backends.backend_ps.xpdf_distill(tmpfile, eps=False, ptype='letter', bbox=None, rotated=False)[source]#
Use ghostscript's ps2pdf and xpdf's/poppler's pdftops to distill a file. This yields smaller files without illegal encapsulated postscript operators. This distiller is preferred, generating high-level postscript output that treats text as text.