Difference between revisions of "Global Command: createScreenshot"

Latest revision as of 18:58, 2 May 2023

Create a screenshot to be used for the next savegame or to save into an external folder as a .png file.

Syntax

createScreenshot(filename, flags)

Parameters

Parameter	Type/Structure		Description
filename	string		If specified the screenshot will be saved to the given path. If not specified the screenshot will be used for the next savegame(s), until a new screenshot is created or the current screenshot is cleared. If a screenshot for a savegame was created before it will be overwritten by the new screenshot.
flags	table	flags = 1	indicates flags table
flags	table	clear (bool)	If true the screenshot will be cleared. If the screenshot is cleared, savegame screenshots will be generated automatically by the engine again (everytime the scene is changed from a playable scene to a menu). If the "flags" parameter is omitted, this defaults to false.

Return values

none

Examples

Example 1: Save a screenshot which will get used for the next savegame.

createScreenshot()

Example 2: Clear the previously saved savegame screenshot.

createScreenshot("", {flags=1, clear = true})

Example 3: Save a screenshot to a folder. If a file with the same name already exists, it will be overwritten. Be aware that the default save location is the game directory, which may be write-protected.

createScreenshot("screenshots/my_screenshot.png")

Example 4: This expanded example uses the "lfs" file system library to check for a "screenshots" folder inside the user directory and creates it if it doesn't exist.

-- Define a screenshot folder inside the user directory
local screenshot_folder = localAppDir .. "screenshots"

-- Function to check if a folder exists
function folderExists(strFolderName)
  if lfs.attributes(strFolderName:gsub("\\$",""),"mode") == "directory" then
    return true
  else
    return false
  end
end

-- Try to create the screenshot folder, if it doesn't exist
if not folderExists(screenshot_folder) then
  lfs.mkdir(screenshot_folder)
end

-- If the screenshot folder exists, save a screenshot with timestamp
if folderExists(screenshot_folder) then
  local time = os.date("%Y-%m-%d_%H-%M-%S")
  createScreenshot(screenshot_folder .. "/screenshot_" .. time .. ".png")
end

@@ Line 26: / Line 26: @@
 |-
 | clear (bool)
-| If true the screenshot will be cleared. Default value is false. If the screenshot is cleared, savegame screenshots will be generated automatically by the engine again (everytime the scene is changed from a playable scene to a menu).
+| If true the screenshot will be cleared. If the screenshot is cleared, savegame screenshots will be generated automatically by the engine again (everytime the scene is changed from a playable scene to a menu). If the "flags" parameter is omitted, this defaults to false.
 |}
@@ Line 36: / Line 36: @@
 == Examples ==
-'''Example 1:''' Save a screenshot to a folder (if a file with the same name exists, it will be overwritten)
+'''Example 1:''' Save a screenshot which will get used for the next savegame.
 <syntaxhighlight lang="lua">
--- save to "screenshots" folder as "filename.png"
+createScreenshot()
-createScreenshot("screenshots/filename.png")
+</syntaxhighlight>
--- save to "screenshots" folder with current timestamp as "filename_(date)_(time).png"
+'''Example 2:''' Clear the previously saved savegame screenshot.
-local time = os.date("%Y-%m-%d_%Hh-%Mm-%Ss")
+<syntaxhighlight lang="lua">
-createScreenshot("screenshots/filename_" .. time .. ".png")
+createScreenshot("", {flags=1, clear = true})
 </syntaxhighlight>
-'''Example 2:''' Save a screenshot to use for the next savegame
+'''Example 3:''' Save a screenshot to a folder. If a file with the same name already exists, it will be overwritten. Be aware that the default save location is the game directory, which may be write-protected.
 <syntaxhighlight lang="lua">
-createScreenshot()
+createScreenshot("screenshots/my_screenshot.png")
 </syntaxhighlight>
-'''Example 3:''' Clear the previously saved savegame screenshot
+'''Example 4:''' This expanded example uses the "lfs" file system library to check for a "screenshots" folder inside the user directory and creates it if it doesn't exist.
 <syntaxhighlight lang="lua">
-createScreenshot("", {flags=1, clear = true})
+-- Define a screenshot folder inside the user directory
+local screenshot_folder = localAppDir .. "screenshots"
+-- Function to check if a folder exists
+function folderExists(strFolderName)
+  if lfs.attributes(strFolderName:gsub("\\$",""),"mode") == "directory" then
+    return true
+  else
+    return false
+  end
+end
+-- Try to create the screenshot folder, if it doesn't exist
+if not folderExists(screenshot_folder) then
+  lfs.mkdir(screenshot_folder)
+end
+-- If the screenshot folder exists, save a screenshot with timestamp
+if folderExists(screenshot_folder) then
+  local time = os.date("%Y-%m-%d_%H-%M-%S")
+  createScreenshot(screenshot_folder .. "/screenshot_" .. time .. ".png")
+end
 </syntaxhighlight>
 {{toc}}