matplotlib.backends.backend_ps#

A PostScript backend, which can produce both PostScript .ps and .eps.

matplotlib.backends.backend_ps.FigureCanvas[source]#

alias ofFigureCanvasPS

classmatplotlib.backends.backend_ps.FigureCanvasPS(figure=None)[source]#

Bases:FigureCanvasBase

draw()[source]#

Render theFigure.

This method must walk the artist tree, even if no output is produced,because it triggers deferred work that users may want to accessbefore saving output to disk. For example computing limits,auto-limits, and tick values.

filetypes={'eps':'EncapsulatedPostscript','ps':'Postscript'}#

fixed_dpi=72#

get_default_filetype()[source]#

Return the default savefig file format as specified inrcParams["savefig.format"] (default:'png').

The returned string does not include a period. This method isoverridden 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)#

classmatplotlib.backends.backend_ps.RendererPS(width,height,pswriter,imagedpi=72)[source]#

Bases:RendererPDFPSBase

The renderer handles all the drawing primitives using a graphicscontext instance that controls the colors/styles.

create_hatch(hatch,linewidth)[source]#

draw_gouraud_triangles(gc,points,colors,trans)[source]#

Draw a series of Gouraud triangles.

Parameters:

gcGraphicsContextBase

The graphics context.

triangles_array(N, 3, 2) array-like

Array ofN (x, y) points for the triangles.

colors_array(N, 3, 4) array-like

Array ofN 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:

gcGraphicsContextBase

A graphics context with clipping information.

xfloat

The distance in physical units (i.e., dots or pixels) from the lefthand side of the canvas.

yfloat

The distance in physical units (i.e., dots or pixels) from thebottom side of the canvas.

im(N, M, 4) array ofnumpy.uint8

An array of RGBA pixels.

transformAffine2DBase

If and only if the concrete backend is written such thatoption_scale_image returnsTrue, an affine transformation(i.e., anAffine2DBase)may be passed todraw_image. Thetranslation vector of the transformation is given in physical units(i.e., dots or pixels). Note that the transformation does notoverridex andy, and has to be appliedbefore translatingthe result byx andy (this can be accomplished by addingxandy to the translation vector defined bytransform).

draw_markers(gc,marker_path,marker_trans,path,trans,rgbFace=None)[source]#

Draw a marker at each ofpath's vertices (excluding control points).

The base (fallback) implementation makes multiple calls todraw_path.Backends may want to override this method in order to draw the markeronly once and reuse it multiple times.

Parameters:

gcGraphicsContextBase

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 the math text using matplotlib.mathtext.

draw_path(gc,path,transform,rgbFace=None)[source]#

Draw aPath 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 ofpaths.

Each path is first transformed by the corresponding entryinall_transforms (a list of (3, 3) matrices) and then bymaster_transform. They are then translated by the correspondingentry inoffsets, which has been first transformed byoffset_trans.

facecolors,edgecolors,linewidths,linestyles, andantialiased are lists that set the corresponding properties.

offset_position is unused now, but the argument is kept forbackwards compatibility.

The base (fallback) implementation makes multiple calls todraw_path.Backends may want to override this in order to render each set ofpath data only once, and then reference that path multiple times withthe different offsets, colors, styles etc. The generator methods_iter_collection_raw_paths and_iter_collection are provided tohelp with (and standardize) the implementation across backends. Itis highly recommended to use those generators, so that changes to thebehavior ofdraw_path_collection can be made globally.

draw_tex(gc,x,y,s,prop,angle,*,mtext=None)[source]#

Draw a TeX instance.

Parameters:

gcGraphicsContextBase

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:

gcGraphicsContextBase

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 theismathparameter to use TeX rendering, but this is not required for actualrendering backends, and indeed many builtin backends do not supportthis. Rather, TeX rendering is provided bydraw_tex.

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 otherartists.

set_color(r,g,b,store=True)[source]#

set_font(fontname,fontsize,store=True)[source]#

set_linecap(linecap,store=True)[source]#

set_linedash(offset,seq,store=True)[source]#

set_linejoin(linejoin,store=True)[source]#

set_linewidth(linewidth,store=True)[source]#

matplotlib.backends.backend_ps.get_bbox_header(lbrt,rotated=False)[source]#

[Deprecated] Return a postscript header string for the given bbox lbrt=(l, b, r, t).Optionally, return rotate command.

Notes

Deprecated since version 3.9.

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 postscriptoperators. 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 ofthe eps file will be replaced with the givenbbox argument. IfNone, 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 postscriptoperators. This distiller is preferred, generating high-level postscriptoutput that treats text as text.