`render()` will generate an image with enough resolution to print a poster with standard ISO 216 A1 dimensions.
render(input, output = paste0(tools::file_path_sans_ext(input), ".png"), width = 1200, aspect_ratio = sqrt(2), height = floor(width * aspect_ratio), poster_width = 594, dpi = 300, delay = 1)
| input | Input file (an html generated with |
|---|---|
| output | Output file. Defaults to the same name that the input file, but uses the png extension. |
| width | Width, in pixels, for the viewport
(see |
| aspect_ratio | Aspect ratio between the height and the width of the viewport. The poster orientation will depend on this ratio; if it is > 1 the orientation is portrait (height > width), and if it is < 1 the orientation is landscape (width > height) |
| height | Calculated using as |
| poster_width | Intended physical width of the printed poster, in mm. Defaults to the width of an A1 sheet with portrait orientation. This will not impact the size of the elements to the page, but the number of pixels covered per element. |
| dpi | Intended print resolution, in dpi. Used to calculate the zoom
factor necessary to produce enough pixels for a |
| delay | Time in seconds for phantomJS to wait while the page loads before taking the snapshot. |
| ... | Ignored |
Silently returns the path of the rendered image.
Currently the dimensions and other parameters can be changed manually, but a mechanism to select different dimension templates with appropriate resolution and zoom for common paper sizes will be implemented.
Documents with dimensions in the ISO A series can be scaled to other sizes in the series, with corresponding decrease in resolution when upscaling or increase in resolution when downscaling.
# NOT RUN { # generate a simple poster from the provided template rmarkdown::draft("my_poster.Rmd", template = "poster", package = "postr") # render the html output rmarkdown::render(input = "my_poster/my_poster.Rmd") # render the png poster postr::render("my_poster/my_poster.html") # }