NEWS.md

In gridpattern: 'grid' Pattern Grobs

gridpattern v1.3.1

• New pattern "aRtsy" with corresponding grid.pattern_aRtsy() with patterns powered by the {aRtsy} package (#87).

gridpattern v1.2.2

Bug fixes and minor improvements

• grid.pattern_weave() adds the new units parameter that most other "geometry" pattern functions received in gridpattern v1.2.1.
• The "polygon_tiling" pattern should now respect the units parameter if set to a value different from the "snpc" default (#82).
• For the "polygon_tiling" pattern type = "18.18.3*" the size of the eighteen-sided polygons have been increased a teeny bit and this polygon tiling should look a bit cleaner.

• The following "placeholder" pattern updates (#83):

• The following placeholder pattern names are now serviced by lucidinternets.com:

  • "cage" and "cagebw"
  • "murray" and "murraybw"
  • "seagal" and "seagalbw"

• The following placeholder pattern names have been removed since their associated web service no longer works:

  • "lorempixel" and "lorempixelbw" (service unavailable since 2022)
  • "placeimg" and "placeimgbw" (support officially ended July 2023)

• The "dummybw" name now provides a pure black-and-white image (i.e. no grey).

• Fixes a regression for the "placeholderbw" name where it redirected to the "seagal" name instead of "placeholder".

gridpattern v1.2.1

Breaking Changes

• The default type for the "placeholder" pattern is now "bear" instead of "kitten". Explicitly set type = "kitten" to continue to use the "kitten" placeholder but note that although the "kitten" placeholder website isn't completely down it has been buggy recently (#73).

New Features

• patternFill() wraps patternGrob() to return a grid::pattern() fill object (#70).
• The "geometry" patterns (e.g. "circle", "stripe", etc.) now allow the fill to be pattern fills (#67).
• The "geometry" patterns (e.g. "circle", "stripe", etc.) now allow the new units parameter to set which grid::unit() to use for the the spacing, xoffset, and yoffset parameters (and for the "wave" pattern also the amplitude and frequency parameters) (#58). By default it will continue to be "snpc" units but can now be changed to "cm", "in", etc.

• update_alpha() updates fill colour and/or pattern transparency.

• It is a fork of ggplot2::fill_alpha() by @teunbrand.

• It does not depend on {ggplot2} or {scales}.
• It does not throw an error with a length one list of a vector of multiple colours.

• It is available as a "standalone" file. You may copy its source under the permissive MIT license into your own R package by either using usethis::use_standalone("trevorld/gridpattern", "standalone-update_alpha.R") or simply copying standalone-update_alpha.R into your R directory and adding grDevices, grid, and rlang to the Imports of your DESCRIPTION file.

• For completeness there is now a new "fill" pattern with corresponding grid.pattern_fill() which draws a simple fill pattern.

• For completeness there is now a grid.pattern_none() corresponding to the previously supported "none" pattern which draws nothing.

Bug fixes and minor improvements

• The wave pattern no longer quietly and incorrectly ignores the frequency parameter. The effective wavelength of the wave pattern is now 1 / frequency instead of spacing. However frequency will continue to default to 1 / spacing.
• clippingPathGrob() can now more efficiently compute a rasterGrob() approximation via ragg::agg_capture() and for png_device functions that support the clipping path feature such aspng(type = "cairo")(#74).
• alphaMaskGrob() can now more efficiently compute a rasterGrob() approximation for png_device functions that support the alpha mask feature such aspng(type = "cairo")(#75).
• alphaMaskGrob() and clippingPathGrob() now switch back to the previously open graphics device if they open and close any new graphics devices.

gridpattern v1.1.1

• "text" pattern example now skipped if ran within certain graphics devices like pdf() that can't handle the playing cards Unicode glyphs (#68).

gridpattern v1.1.0

New Features

• reset_image_cache() resets the image cache used by grid.pattern_image() and grid.pattern_placeholder() to store images (#63).

Bug fixes and minor improvements

• The function guess_has_R4.1_features() is now available as a "standalone" file. You may copy its source under the permissive MIT No Attribution (MIT-0) license into your own R package by either using usethis::use_standalone("trevorld/gridpattern", "standalone-guess_has_R4.1_features.R") or simply copying standalone-guess_has_R4.1_features.R into your R directory and adding grDevices and utils to the Imports of your DESCRIPTION file.
• If {vdiffr} has been updated to at least v1.0.6 (released 2023-08-25) then guess_has_R4.1_features() should now always correctly guess R4.1 feature support for the svglite::svglite() and vdiffr:::svglite() graphics devices.

gridpattern v1.0.2

Bug fixes and minor improvements

• An internal function convert_polygon_sf_to_polygon_df() will now be a bit more quiet (throw WARNINGs less often).

gridpattern v1.0.1

Bug fixes and minor improvements

• guess_has_R4.1_features() can now also take advantage if dev.capabilities() explicitly indicates that a feature is not supported in active graphics device.
• To match aesthetic changes in {ggplot2} one may now use the parameter linewidth to set polygon/path line widths in grid.pattern_circle(), grid.pattern_crosshatch(), grid.pattern_pch(), grid.pattern_polygon_tiling(), grid.pattern_regular_polygon(), grid.pattern_stripe(), grid.pattern_rose(), grid.pattern_wave(), and grid.pattern_weave(). For backwards compatibility one may continue to use size as well. Continue to use size (or gp) to set the fontsize in grid.pattern_text(). Both pattern_linewidth and pattern_size will be available for use in custom patterns (#57).

gridpattern v0.5.3

Bug fixes and minor improvements

• Fixes bug with grid.pattern_image() with type = "tile" (#47). Additionally grid.pattern_image() now supports gravity argument when type = "tile".

• If the active graphics device has also implemented the new R 4.2 dev.capabilities() support then guess_has_R4.1_features() can now better guess R 4.1 graphic feature support when called within R 4.2.

• In particular guess_has_R4.1_features() can now better guess R 4.1 graphic feature support in the {grDevices} bitmap devices (i.e. bmp(), jpeg(), png(), tiff()) when called within R 4.2 on Windows. Previously it was not possible to easily distinguish on Windows if the device was called with type = "windows" or type = "cairo" and hence we had to conservatively guess no such support even if type = "cairo" had been specified (and within R 4.1 we must still conservatively do so).

• Also if in the future any graphic devices add R 4.1 graphic feature support as well as R 4.2 dev.capabilities() support then we should now be able to correctly guess such support within R 4.2 without needing to manually update guess_has_R4.1_features().

• guess_has_R4.1_features() now supports an argument features which allows one to limit the guessing of R4.1 feature support to a subset of c("clippingPaths", "gradients", "masks", "patterns"). Although all known graphic devices either implements all or none of these features this need not hold true in the future.

gridpattern v0.5.1

Breaking Changes

• grid.pattern_rose() and grid.pattern_text() now "clip" their boundary using an "alpha mask" rather than a "clipping path". Now use the argument use_R4.1_masks, the global option ggpattern_use_R4.1_masks, or the global option ggpattern_use_R4.1_features to toggle on/off the R 4.1 alpha mask feature instead of using the use_R4.1_clipping argument or the global option ggpattern_use_R4.1_clipping as before (the latter continue to toggle on/off the R 4.1 clipping path feature in clippingPathGrob()).

New Features

• alphaMaskGrob() is a function that (alpha) masks one grob by using a second grob to specify the (alpha) mask.

• If use_R4.1_masks is TRUE we simply use the new R 4.1 (alpha) masks feature.

• If use_R4.1_masks is FALSE we generate a grid::rasterGrob() approximation.
• If use_R4.1_masks is NULL try to guess an appropriate choice.
• The default for use_R4.1_masks can be set by options("ggpattern_use_R4.1_masks").

Bug fixes and minor improvements

• guess_has_R4.1_features() now returns TRUE for the ragg::agg_jpeg(), ragg::agg_ppm(), and ragg::agg_tiff() devices if packageVersion("ragg") >= '1.2.0'. It also returns TRUE for svglite::svglite() if packageVersion("svglite") >= '2.1.0'.
• clippingPathGrob() will now consistently - as previously documented - use ragg::agg_png() as the default png_device graphics device if it is available and use_R4.1_clipping is FALSE.
• grid.pattern_image() should no longer throw an inscrutable Error in magick_image_readpath... error on certain platforms such as Windows (#47).

gridpattern v0.4.0

New Features

• guess_has_R4.1_features() is now an exported function. It guesses whether the "active" graphic devices supports the new R 4.1 graphics features and returns TRUE or FALSE.

Bug fixes and minor improvements

• grid.pattern_polygon_tiling() now supports the "elongated_triangular" type (#48). "geometry" patterns now support a "elongated_triangle" grid value.
• guess_has_R4.1_features() now returns TRUE for the ragg::agg_png() and ragg::agg_supertransparent() devices if packageVersion("ragg") >= '1.2.0'. It now also returns TRUE for the grDevices::bmp(type = "cairo"), grDevices::cairo_ps(), grDevices::jpeg(type = "cairo"), and grDevices::tiff(type = "cairo") devices if getRversion() >= '4.1.0'.

gridpattern v0.3.1

Breaking Changes

• The package {magick} has been downgraded from "Imports" to "Suggests" (#44). You'll need to manually install {magick} with install.packages("magick") in order to use the following "array" patterns:

• "gradient" (but only if use_R4.1_gradients is FALSE)

• "image"
• "magick"
• "placeholder"
• "plasma"

New Features

• The following package option ggpattern_res can now be set by options(). It controls default "raster" image pattern resolution (pixels per inch). Defaults to 72 (pixels per inch).

• grid.pattern_polygon_tiling() now supports the following additional polygon tiling type's (#42):

• "rhombille" implements a rhombille tiling of rhombi (#37)

• "tetrakis_square" implements a tetrakis square tiling of isosceles right triangles (#38)
• "2*.2**.2*.2**" implements a polygon tiling made of rhombi.
• "2**.3**.12*" implements a polygon tiling made of rhombi, triangles, and twelve-pointed stars.
• "3.3.3.3**" implements a polygon tiling made of triangles.
• "3.3*.3.3**" implements a regular (star) polygon tiling made of triangles and three-pointed stars.
• "3.3.3.12*.3.3.12*" implements a regular (star) polygon tiling made of triangles and twelve-pointed starts.
• "3.3.8*.3.4.3.8*" implements a regular (star) polygon tiling of triangles, squares, and eight-pointed stars.
• "3.3.8*.4**.8*" implements a regular (star) polygon tiling made of triangles, four-pointed stars, and eight-pointed stars.
• "3.4.6.3.12*" implements a regular (star) polygon tiling made of triangles, squares, hexagons, and twelve-pointed stars.
• "3.4.8.3.8*" implements a regular (star) polygon tiling of triangles, squares, octagons, and eight-pointed stars.
• "3.6*.6**" implements a regular (star) polygon tiling made of triangles and six-pointed stars.
• "4.2*.4.2**" implements a polygon tiling made of squares and rhombi.
• "4.4*.4**" implements a regular (star) polygon tiling made of squares and four-pointed stars.
• "4.6.4*.6" implements a regular (star) polygon tiling made of squares, hexagons, and four-pointed stars.
• "4.6*.4.6*.4.6*" implements a regular (star) polygon of squares and six-pointed stars.
• "4.8*.4**.8*" implements a polygon tiling of squares and eight-pointed stars.
• "6.6*.6.6*" implements a regular (star) polygon of hexagons and six-pointed stars.
• "8.4*.8.4*" implements a regular (star) polygon of octagons and four-pointed stars.
• "9.3.9.3*" implements a regular (star) polygon of triangles, nonagons, and three-pointed stars.
• "12.3*.12.3*" implements a regular (star) polygon tiling made of dodecagons and three-pointed stars.
• "12.12.4*" implements a regular (star) polygon tiling made of dodecagons and four-pointed stars.

• "18.18.3*" implements a regular (star) polygon tiling made of eighteen-sided polygons and three-pointed stars.

• grid.pattern_regular_polygon() now supports a "tetrakis_left" shape and "tetrakis_right" shape which both draw an isosceles right triangle (one oriented left and one oriented right) as well as a "rhombille_rhombus" shape which draws a rhombus. These are non-regular polygons intended to help produce tetrakis square and rhombille polygon tilings.

Bug fixes and minor improvements

• star_angle() and star_scale() now handle the n_vertices == 2 case (a "two-pointed star" polygon is a rhombus).
• Fixes grid.pattern_gradient() when use_R4.1_gradients=TRUE to better match behavior when use_R4.1_gradients=FALSE.
• Now allows alpha values to be specified within the fill (and fill2) colour strings for gridpattern_plasma() and gridpattern_gradient() (when use_R4.1_gradients=FALSE).
• In pattern_square() for the "horizontal" and "vertical" types the value 1L is now guaranteed to be in the center of the pattern (#46).

gridpattern v0.2.1

Breaking Changes

• "array" patterns no longer set a minimum 12 pixel image width and/or height. In particular, they can now have a zero pixel image width and/or height (in which case the array pattern returns a grid::nullGrob()).
• "array" patterns no longer reduces the number of requested pixels when legend = TRUE.

New Features

• Supports the following new patterns:

• "rose" (curve) grid.pattern_rose() (#43)

• "text" grid.pattern_text() (#40)

• "wave" grid.pattern_wave() which supports "sine" and "triangle" type waves (#16)

• names_pattern is a new character vector of supported (builtin) patterns.

• clippingPathGrob() is a function that clips one grob according to clipping path set by a second grob.

• If use_R4.1_clipping is TRUE we simply use the new R 4.1 clipping path feature

• If use_R4.1_clipping is FALSE we generate a grid::rasterGrob() approximation
• If use_R4.1_clipping is NULL try to guess an appropriate choice.

• The default for use_R4.1_clipping can be set by options("ggpattern_use_R4.1_clipping")

• grid.pattern_gradient() now supports the argument use_R4.1_gradients

• If TRUE use the new R 4.1 gradient feature

• If FALSE use a rasterGrob approximation (old behaviour)
• If NULL try to guess an appropriate choice.

• The default for use_R4.1_gradients can be set by options("ggpattern_use_R4.1_gradients")

• The following package options can now be set by options():

• ggpattern_use_R4.1_clipping If TRUE use the grid clipping path feature introduced in R v4.1.0. If FALSE do a rasterGrob approximation of the clipped pattern. Currently used by clippingPathGrob(), grid.pattern_rose(), grid.pattern_text(), and available for custom patterns.

• ggpattern_use_R4.1_features Set the default for all the other ggpattern_use_R4.1_* options arguments.
• ggpattern_use_R4.1_gradients If TRUE use the grid gradient feature introduced in R v4.1.0. If FALSE do a rasterGrob approximation of the gradient pattern. Currently used by grid.pattern_gradient() and available for custom patterns.
• ggpattern_use_R4.1_masks If TRUE use the grid mask feature introduced in R v4.1.0. Currently unused by this package but available for custom patterns.
• ggpattern_use_R4.1_patterns If TRUE use the grid pattern feature introduced in R v4.1.0. Currently unused by this package but available for custom patterns.

Bug fixes and minor improvements

• grid.pattern() now throws an error if there is a non-unique pattern name (set by options("ggpattern_geometry_funcs") and/or options("ggpattern_array_funcs")).
• Fixes an error when catching a {magick} image reading error for some array patterns.

gridpattern v0.1.2

• grid.pattern() draws a specified "pattern" to the active graphics device while patternGrob() returns a "pattern" (grid) grob.

• Supports the following original patterns:

• "pch" grid.pattern_pch()

• "polygon_tiling" grid.pattern_polygon_tiling() (#13)
• "regular_polygon" grid.pattern_regular_polygon() (#20)

• "weave" grid.pattern_weave() (#12)

• Supports the following patterns from ggpattern:

• "ambient" grid.pattern_ambient()

• "circle" grid.pattern_circle() (#5)
• "crosshatch" grid.pattern_crosshatch()(#4)
• "gradient" grid.pattern_gradient()(#8)
• "image" grid.pattern_image()(#9)
• "magick" grid.pattern_magick() (#6)
• "none" grid::null()
• "placeholder" grid.pattern_placeholder() (#10)
• "plasma" grid.pattern_plasma() (#7)
• "stripe" grid.pattern_stripe() (#3)
• Custom ggpattern geometry-based patterns (#1)
• Custom ggpattern array-based patterns (#2)

Enhancements made to the {ggpattern} patterns provided by this package:

* Resolution of "array" patterns is now settable by new "pattern_res".
  Defaults to 72 pixels per inch but sets a minimum 12 pixel image width and/or height.
* Default for "pattern_alpha" is now ``NA_real_`` (preserve existing alpha transparency) instead of ``1`` (set to fully opaque).
* ``grid.pattern_ambient()`` pattern supports all arguments of the six ``{ambient}`` "noise" functions.
* ``grid.pattern_circle()`` has several enhancements:

  * Allows use of the argument ``xoffset`` and ``yoffset`` (#22)
  * Allows use of arguments ``grid``, ``type``, and ``subtype`` to customize the pattern arrangement.
  * Use of multiple ``fill`` colors now produces a more attractive pattern.
  * Use of ``density`` greater than ``1`` will now sometimes give an attractive result (#17).
  * Uses ``{sf}`` to clip circles to boundary instead of ``{gridGeometry}``

* ``grid.pattern_crosshatch()`` allows using the argument ``fill2`` to set 
   different fill color(s) for the "over" crosshatch lines (#14).
* ``xoffset``, ``yoffset``, and ``spacing`` are now interpreted as "snpc" units and
  ``grid.pattern_stripe()`` and ``grid.pattern_crosshatch()`` now allow using the 
  argument ``grid`` to tweak placement of lines so that they now match the placement
  of circles from ``grid.pattern_circle()`` and polygons from ``grid.pattern_regular_polygon()`` (#24).
* The center point of the geometry "grid" now matches the center of the viewport.

• mean_col() is a utility function that computes an "average" color (#21)
• star_scale() and star_angle() are utility functions for converting between regular star polygon parameterizations (#39).
• pattern_hex() returns an integer matrix indicating placement of multiple colors (or other graphical elements) on a hex grid. Supports types listed in hex_names.
• pattern_square() returns an integer matrix indicating placement of multiple colors (or other graphical elements) on a rectangular grid. Supports types listed in square_names.
• pattern_weave() returns a logical matrix indicating where the warp lines should "up" for a specified weave pattern type and subtype. Supports weaves listed in weave_names. In particular supports "irregular matt" and "elongated twill" family of weave patterns including "zig-zag" and "herringbone" variations.

gridpattern documentation built on April 3, 2025, 11:28 p.m.