matplotlib.backends.backend_ps
¶A PostScript backend, which can produce both PostScript .ps and .eps.
matplotlib.backends.backend_ps.
FigureCanvas
¶matplotlib.backends.backend_ps.
FigureCanvasPS
(figure)[source]¶Bases: matplotlib.backend_bases.FigureCanvasBase
filetypes
= {'eps': 'Encapsulated Postscript', 'ps': 'Postscript'}¶fixed_dpi
= 72¶matplotlib.backends.backend_ps.
PsBackendHelper
[source]¶Bases: object
gs_exe
¶gs_version
¶supports_ps2write
¶matplotlib.backends.backend_ps.
RendererPS
(width, height, pswriter, imagedpi=72)[source]¶Bases: matplotlib.backends._backend_pdf_ps.RendererPDFPSBase
The renderer handles all the drawing primitives using a graphics context instance that controls the colors/styles.
afmfontd
¶[Deprecated]
Notes
Deprecated since version 3.1:
draw_gouraud_triangle
(self, gc, points, colors, trans)[source]¶Draw a Gouraud-shaded triangle.
Parameters: |
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draw_gouraud_triangles
(self, gc, points, colors, trans)[source]¶Draws a series of Gouraud triangles.
Parameters: |
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draw_image
(self, gc, x, y, im, transform=None)[source]¶Draw an RGBA image.
Parameters: |
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draw_markers
(self, gc, marker_path, marker_trans, path, trans, 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: |
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draw_mathtext
(self, gc, x, y, s, prop, angle)[source]¶Draw the math text using matplotlib.mathtext.
draw_path
(self, gc, path, transform, rgbFace=None)[source]¶Draws a Path
instance using the
given affine transform.
draw_path_collection
(self, gc, master_transform, paths, all_transforms, offsets, offsetTrans, facecolors, edgecolors, linewidths, linestyles, antialiaseds, urls, offset_position)[source]¶Draws a collection of paths selecting drawing properties from the lists facecolors, edgecolors, linewidths, linestyles and antialiaseds. offsets is a list of offsets to apply to each of the paths. The offsets in offsets are first transformed by offsetTrans before being applied. offset_position may be either "screen" or "data" depending on the space that the offsets are in.
This provides a fallback implementation of
draw_path_collection()
that makes multiple calls to
draw_path()
. Some 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_text
(self, gc, x, y, s, prop, angle, ismath=False, mtext=None)[source]¶Draw the text instance.
Parameters: |
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Notes
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.
matplotlib.backends.backend_ps.
convert_psfrags
(tmpfile, psfrags, font_preamble, custom_preamble, paperWidth, paperHeight, orientation)[source]¶When we want to use the LaTeX backend with postscript, we write PSFrag tags to a temporary postscript file, each one marking a position for LaTeX to render some text. convert_psfrags generates a LaTeX document containing the commands to convert those tags to text. LaTeX/dvips produces the postscript file that includes the actual text.
matplotlib.backends.backend_ps.
get_bbox
(tmpfile, bbox)[source]¶[Deprecated] Use ghostscript's bbox device to find the center of the bounding box. Return an appropriately sized bbox centered around that point. A bit of a hack.
Notes
Deprecated since version 3.0.
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.
quote_ps_string
(s)[source]¶Quote dangerous characters of S for use in a PostScript string constant.
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.