# Incompatible Changes

This is a list of changes that may require intervention in the form of changes to scripts or your development environment. Our intent is that all other changes should not affect existing scripts.

Note that setting `config.script_version` will cause many of these changes to be reverted, at the cost of losing access to recent features.

Incompatible changes to the GUI are documented at Incompatible GUI Changes, as such changes only take effect when the GUI is regenerated.

## 7.5.0/8.0.0

The “Windows, Mac, and Linux for Markets” distribution has been changed to no longer prefix the contents of the zip file created with the directory name and version number. If you’d like to retain the old behavior, add to your game:

    init python:
        build.package("market", "zip", "windows linux mac renpy all", "Windows, Mac, Linux for Markets")

For the noalt text tag to work with history, you’ll need to edit screens.rpy to make sure that `gui.history_allow_tags` contains “noalt”. The defaultfor this variable is:

    define gui.history_allow_tags = { "alt", "noalt" }

(This change was necessary in 7.4, but only documented now.)

The behavior of Ren’Py changed sometime in the 7.4 series, such that rollback through a load behaved correctly, and reverted the changes performed in the `after_load` label, and by `config.after_load_callbacks`. (The previous behavior was undefined, with some changes reverted and some not, leaving the game in an inconsistent state.) If your game has to migrate data after a load, it’s now recommended to call `renpy.block_rollback()` to prevent the changes from being rolled back.

The `config.narrator_menu` variable now defaults to True. It’s been set to true in the default screens.rpy for some time. In the unlikely event it was false in your game, restore the old behavior with:

    define config.narrator_menu = False

The sound and voice channels are now stopped when ending the main menu. To revert to the prior behavior (only the movie channel was stopped), add to your game:

    define config.main_menu_stop_channels = [ "movie" ]

Screens called by `call screen` no longer support roll forward by default. See the changelog for the problems it can cause. Roll forward can be enabled on a per screen basis with the roll_forward property, or for all screens with:

    define config.call_screen_roll_forward = True

Key and timer statements no longer take up space inside a vbox or hbox, and the showif statement does not take up space when its child is hidden. To revert this change:

    define config.box_skip = False

The `focus_mask` style property now defaults to None for drag displayables. This improves performance, but means that the displayable can be dragged by transparent pixels. To revert this, the focus_mask property can be set to True for individual drags, or globally with:

    style drag:
        focus_mask True

Both options reduce performance.

The `outline_scaling` style property now defaults to “linear”. This means the window scaling factor is applied to the outline size, and then rounded to an integer. This can cause multiple outlines of similar sizes to disappear. To revert this, the outline_scaling property can be set to “step” for individual text elements, or globally with:

    style default:
        outline_scaling "step"

The `crop_relative` transform property now defaults to True instead of False. Absolute numbers of pixels to set the cropping should be expressed with ints or `absolute` numbers. To revert to the former default behavior, which casts floats to an absolute number of pixels, use:

    define config.crop_relative_default = False

However, be warned that like most things documented only on this page, this will conflict with - and cannot be used at the same time as - some other new features. This setting applies to `crop`, and also now to `corner1` and `corner2`.

The platform-specific directories inside lib/ have had name changes. The `lib/windows-x86_64` directory is now `lib/py2-windows-x86_64`. This change helps support the development of the Python 3 powered Ren’Py 8. These directories are not documented, and may change between Ren’Py versions, but we do guarantee that `sys.executable` is set.

Vpgrids cannot be overfull anymore, and can only be underfull if the `allow_underfull` property is passed, or if `config.allow_underfull_grids` is set to True.

The way layered images place their children, and how children with variable size are sized, has changed. Instead of taking into account the available area in the context the layeredimage is displayed, it now presumes the size of the screen is available, unless an explicit size has been given with `xsize`, `ysize` or `xysize`. To revert to the old behavior, where a layeredimage can display differently in different contexts, you can use:

    define config.layeredimage_offer_screen = False

Or you can also toggle it for specific layeredimages by passing them the `offer_screen` property.

The `function` statement in ATL will only block catch-up in cases where it executes more than once. To revert to the old behavior, where ATL would block at a function, use:

    define config.atl_function_always_blocks = True

## 7.4.11

Ren’Py will now run a button’s unhovered property even when focus is changed by default, such as when a screen is shown or unshown. To revert to the old behavior, use:

    define config.always_unfocus = False

## 7.4.9

Ren’Py will now interpret floating point numbers given to a Transform’s `xsize` or `ysize` properties as a size relative to the area available to the Transform. To revert this change:

    define config.relative_transform_size = False

The order in which Ren’Py’s self-voicing reads out layers, screens, and displayables in screens has changed so that screens and displayables closest to the player are read first. To revert to the old order:

    define config.tts_front_to_back = False

## 7.4.7

When `xminimum` and `xmaximum` are both floats, the minimum is interpreted as being a fraction of the available area. This means that `xsize` will have the expected result when being given a float. This may cause some displayables to change size. To revert this change:

    define config.adjust_minimums = False

An ATL displayable will now start its animation when it first appears, rather than when the screen itself is shown. To revert this change:

    define config.atl_start_on_show = False

Input carets now blink by default. To change this:

    define config.input_caret_blink = False

## 7.4.6

The change regarding the layer at list in 7.4.5 was reverted. The new `camera` statement defaults to the new semantics, while leaving `show layer` alone.

## 7.4.5

Games produced with this version use the model-based renderer by default. To disable the model-based renderer, use:

    define config.gl2 = False

Reverted in 7.4.6 The `scene` statement no longer clears the layer at list. To clear the layer at list, use:

    show layer master

Where “master” is the name of the layer. Alternatively, the old behavior can be restored with:

    define config.scene_clears_layer_at_list = True

## 7.4.3

It is now possible to click to dismiss transitions introduced with `renpy.transition()`, and places that use it like the `with` clause of say or `call screen` statement. To prevent this, use:

    define config.dismiss_blocking_transitions = False

## 7.4.1

Pause with a delay now uses `renpy.pause()` rather than `with Pause(...)`. This means that the user will have to click to bypass multiple pauses in a row. To revert to the old behavior, use:

    define config.pause_with_transition = True

## 7.4

Mobile platforms now use hardware, rather than software, video playback. To restore the old behavior, use:

    define config.hw_video = True

Ren’Py will now only show side images if with at least one attribute in addition to the image tag. To disable this, use:

    define config.side_image_requires_attributes = False

While setting config variables, like `config.mouse`, outside of the init phase was never supported, it will not work in 7.4. Consider using the `default_mouse` variable to set a custom mouse cursor, instead.

## 7.3.3

Callbacks registered with `config.start_callbacks` are now run after `default` statements in all cases. To restore the old behavior (where callbacks were run before `default` statements during game but not replay start), use:

    define config.early_start_store = True

When given to a viewport or vpgrid with scrollbars, the minimum, xminimum, and yminimum side properties now apply to the side containing the scrollbars and viewport, and not solely the viewport.

To work around this, either use `viewport_minimum`, `viewport_xminimum`, and `viewport_yminimum`, or include:

    define config.compat_viewport_minimum = True

## 7.3.0

Screen language now produces the error “a non-constant keyword argument … is not allowed after a python block.” when it encounters screens similar to the following:

    screen test():

        default a = 0

        button:
            $ a = 1
            action Return(a)

            text "Test"

This is because the property action is run before the python assignment, meaning this was returning 0 when clicked, not 1. To disable this check, add

    define config.keyword_after_python = True

to a file named 01compat.rpy in your game’s game directory. However, your game will have the old behavior.

The order in which children of the `side` layout are drawn is now taken from the control string. To revert to the old fixed order, use:

    define config.keep_side_render_order = False

The interface of `config.say_attribute_transition_callback` has been changed in an incompatible way, to allow sets of old and new tags to be given. To revert to the old interface, use:

    define config.say_attribute_transition_callback_attrs = False

It’s mode parameter has also been slightly changed, and will now return a value of `both` when both a `permanent` and `temporary` attribute transition is occuring.

## 7.2.2

`config.say_attribute_transition_callback` has been changed to accept a new argument, the image being displayed.

## 7.1.1

Ren’Py’s window auto function will now determine if dialogue or a caption is associated with a menu statement, and will attempt to hide or show the dialogue window as appropriate. A “Force Recompile” is necessary to include the information that enables this feature. While it should work with older games, this can be disabled and the old behavior restored with:

    define config.menu_showed_window = True
    define config.window_auto_show = [ "say" ]
    define config.window_auto_hide = [ "scene", "call screen" ]

While not technically an incompatible change, there is a recommend change to the history screen. Please see the changelog entry for details of how to update your game.

## 7.1

When an image is not being show, say-with-attributes now resolves a side image, rather than just using the attributes given. To disable this, add:

    define config.say_attributes_use_side_image = False

## 7.0

Ren’Py now defines automatic images at init 0, rather than at a very late init level. To revert to the prior behavior, add to your game:

    init -1:
        define config.late_images_scan = True

The `Dissolve()`, `ImageDissolve()`, and `AlphaDissolve()` transitions now default to using the alpha channel of the source displayables, as if `alpha=True` was given. To revert this change, add:

    define config.dissolve_force_alpha = False

Showing a movie sprite that is already showing will now replay the movie. To revert to the previous behavior:

    define config.replay_movie_sprites = False

## 6.99.13

The size of a hyperlink is now inherited from the size of the enclosing text. To disable this, add:

    define config.hyperlink_inherit_size = False

The {nw} text tag now waits until voice and self-voicing are finished before it continues. To disable this behavior, add:

    define config.nw_voice = False

ATL Transforms now show at least one frame whenever a pause or interpolation occurs. When a game doesn’t expect this, it can show up as a series of rapidly displayed single frames. This can be disabled with:

    define config.atl_one_frame = False

The show layer at statement now persists the state of a transform like any other ATL transform. This can lead to a behavior change in which, for example, an offset persists between multiple show layer at statements. To disable this, write:

    define config.keep_show_layer_state = False

While not an incompatible change, `renpy.list_files()` has been changed to sort its output in a standard order. The causes Ren’Py to commit to behavior that had been ambiguous. For example, when multiple files in the images directory had the same name, Ren’Py would pick one at random. (The file picked could change from system to system.) Now, the same file is chosen wherever Ren’Py is run.

## 6.99.12.3

Ren’Py will no longer search for system-installed fonts when in developer mode. If you game was using a system installed font, the font file should be copied into the game/ directory. (But please make sure that this is compatible with the font file’s license.)

## 6.99.11

The order of execution of `style` and `translate` statements has changed, as documented in the changelog. To revent this change, add the code:

    define config.new_translate_order = False

Note that reverting this change may prevent the new GUI from working.

The `config.quit_action` variable has changed its default to one that causes the quit prompt to be displayed of the in-game context. To revert to the old behavior, add the code:

    define config.quit_action = ui.gamemenus("_quit_prompt")

Ren’Py now enforces maximum sizes given to buttons and windows. To disable this behavior, add the code:

    define config.enforce_window_max_size = False

## 6.99.9

Ren’Py now plays interface sounds on a channel named “audio”, that supports multiple sound playback at once. This channel might not have the same settings as a customized sound channel. The audio channel settings can be changed by adjusting `config.auto_channels`, or the sound channel can be used by adding the code:

    define config.play_channel = "sound"

## 6.99.2

Ren’Py will now scan the an image directory (the directory named images underneath the game directory) for images, and define them based on their filename. To disable this behavior, use the code:

    init python:
        config.image_directory = None

## 6.18

The `show screen` and `call screen` statements may now evaluate their arguments as part of the screen prediction process. If evaluating the arguments to a screen causes side effects to occur, the `show screen` or `call screen` statements should be given the new `nopredict` clause, which prevents prediction.

Screens now participate in transitions – transitions now go from the old state of the screen to the new state. To disable this, set `config.transition_screens` to false.

Ren’Py no longer uses structural equality to transfer state (for example, the state of a transform) when a screen replaces a screen with the same tag. Instead, the use statement now supports an `id` property, which can be used to explicitly transfer state.

## 6.16

The meaning of the loop parameter to `MusicRoom()` has changed. To get the old behavior, set both loop and single_track to true.

## 6.15.7

Ren’Py now expects auto-forward mode to be controlled by the “auto-forward” `Preference()`. To have it controlled by the auto-forward mode slider, set `config.default_afm_enable` to None.

## 6.14

Previously, Ren’Py moved archived files into the archived/ directory. It would search this directory automatically when running a game or building archives. One-click builds make this unnecessary, and files in archived/ should be moved back into the game directory.

`MoveTransition()` has changed its interface. The old version of MoveTransition can be accessed as OldMoveTransition, if you don’t want to rewrite your code. (The changes only matter if you use factories with MoveTransition.)

`Transform()` has changed its behavior with regards to asymmetrically scaled and rotated images. It’s unlikely the old behavior was ever used.

## 6.13.8

Old-style string interpolation has been re-enabled by default. If you wrote code (between 6.13 and 6.13.7) that uses % in say or menu statements, you should either write %% instead, or include the code:

    init python:
        config.old_substitutions = False

## 6.13

The changes to text behavior can affect games in development in many ways. The biggest change is the introduction of new-style (square-bracket) text substitutions, and the elimination of old-style (percent-based) substitutions. These changes can be reverted with the code:

    init python:
        config.old_substitutions = True
        config.new_substitutions = False

New- and old-style substitutions can coexist in the same game, by setting both variables to True.

Ren’Py has also changed the default line-wrapping behavior. While the new behavior should never increase the number of lines in a paragraph, it may change which words fall on each line. To restore the old behavior, add the code:

    init python:
        style.default.layout = "greedy"
        style.default.language = "western"

A bug with negative line_spacing was fixed. This fix can cause blocks of text to shrink in height. To revert to the old behavior, use:

    init python:
        config.broken_line_spacing = True

Finally, the new text code may lead to artifacts when displaying slow text, especially in conjunction with a negative line spacing. Consider adjusting `line_overlap_split` to fix this.

## 6.12.1

Image names have changed from being static names to being attribute-based. This can lead to image names that were previously distinct becoming ambiguous. To disable attribute-based image names, set `config.image_attributes` to False.

Showing an image without providing a transform or ATL block will now continue the previous transform that the image was using. This means that a moving image may continue moving once it has changed. To revert to the old behavior, set `config.keep_running_transform` to False.

The image argument to `Character()` has changed meaning. While the old meaning was unsupported in the screens-based environment, it can be restored for compatibility purposes by setting `config.new_character_image_argument` to False.

## 6.12.0

The definition of the items parameter of the Choice and `nvl_choice` screens has changed. The `nvl_choice` screen is deprecated in favor of the NVL screen.

Screens may be invoked at any time, in order to allow for image prediction, unless they have a predict property of False. When the predict property is not False, screens should not cause side effects to occur upon their initial display.

For performance reason, Ren’Py now ignores the position properties of ImageReferences. This means that the position properties of style.image_placement are now ignored. To revert to the old behavior, set `config.imagereference_respects_position` to True.

## 6.11.1

MoveTransition has been modified to respect the xoffset and yoffset parameters of the displayables it is moving. The factory functions that are used for movement now take xoffset and yoffset parameters. While the built-in movement factories take these parameters without problem, user-defined factories may need to be upgraded to use or ignore these additional parameters.

## 6.11.0

- The transform specified by the `config.default_transform` variable is used to initialize the transform properties of images shown using the show and hide statements. The default value of this transform sets `xpos` and `xanchor` to 0.5, and `ypos` and `yanchor` to 1.0.

  This represents a change in the default value of these style properties, which were previously uninitialized and hence defaulted to 0.

  By including the `reset` transform in ATL transforms, these properties can be reset back to 0. Alternatively, one can stop using the default transform, and revert to the old behavior, using the code:

      init python:
          style.image_placement.xpos = 0.5
          style.image_placement.ypos = 1.0
          style.image_placement.xanchor = 0.5
          style.image_placement.yanchor = 1.0

          config.default_transform = None

- If a transform does not define one of the position properties `xpos`, `ypos`, `xanchor`, or `yanchor`, that property will be taken from the transform’s child, if the defines that property.

  This makes it possible to have one transform control a displayable’s vertical motion, and the other control the horizontal. But this is incompatible with previous behavior, and so can be disabled with the `config.transform_uses_child_position` variable.

      init python:
          config.transform_uses_child_position = False

## 6.10.0

- The default positions (left, right, center, truecenter, offscreenleft, and offscreenright) are now defined as ATL transforms. This means that showing an image at such a position will cause the position to be remembered. If you do not want this behavior, you need to redefine these positions, by adding the code:

      define left = Position(xalign=0.0)
      define center = Position(xalign=0.5)
      define truecenter = Position(xalign=0.5, yalign=0.5)
      define right = Position(xalign=1.0)
      define offscreenleft = Position(xpos=0.0, xanchor=1.0)
      define offscreenright = Position(xpos=1.0, xanchor=0.0)

## 6.9.2

- To migrate your game from Ren’Py 6.9.2 or later, copy the directory containing your game into your projects directory. You can choose a projects directory by clicking “Options”, “Projects Directory” in the Launcher. Please see the Ren’Py 6.9.2 release notes for information about migrating from older releases.