Block surreal_text() on Windows due to the GhostScript missing the `p…

…pm` type.

R/surreal-text.R

@@ -106,6 +106,10 @@ process_image <- function(image) {
 #' @return
 #' A data.frame containing the results of the surreal method application.
 #'
+#' @details
+#' This function is not supported on Windows due to the `ppm` image format
+#' not being supported by the version of GhostScript included with R.
+#'
 #' @examples
 #' # Create a surreal plot of the text "R is fun" appearing on one line
 #' r_is_fun_result <- surreal_text("R is fun", verbose = TRUE)
@@ -124,6 +128,11 @@ surreal_text <- function(text = "hello world",
                          n_add_points = 40,
                          max_iter = 100, tolerance = 0.01, verbose = FALSE) {
 
+  if (.Platform$OS.type == "windows") {
+    message("This function is not supported on Windows.")
+    return(NULL)
+  }
+
   # Create temporary plot of the text
   temp_file <- temporary_text_plot(text = text, cex = cex)
 

README.Rmd

@@ -98,6 +98,10 @@ The residual plot reveals the original R logo with a slight border, enhancing th
 
 ## Creating Custom Hidden Images
 
+> [!IMPORTANT]
+>
+> This function is unable to work on Windows as the version of GhostScript included with R does not support the `ppm` type.
+
 You can also create datasets with custom hidden images or text. Here's a quick example using text:
 
 ```{r}

README.md

@@ -100,6 +100,11 @@ enhancing the image recovery.
 
 ## Creating Custom Hidden Images
 
+> \[!IMPORTANT\]
+>
+> This function is unable to work on Windows as the version of
+> GhostScript included with R does not support the `ppm` type.
+
 You can also create datasets with custom hidden images or text. Here’s a
 quick example using text: