Full Changelog — Ren'Py Documentation

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# Full Changelog

## Ren'Py 6.99.8

### Tags, Layers, and Transforms

The new `config.tag_layer` variable makes it possible to specify the default layer used by an image on a per image tag basis. This makes it possible to place an image on its own layer without having to use onlayer. The new `config.default_tag_layer` variable specifies the default layer for unknown tags.

The new `renpy.add_layer()` function provides as way to add a new layer above or below the existing layers, if and only if the layer does not already exist.

The new `config.tag_transform` variable makes it possible to specify a default transform (or list of transforms) to use when a transform is not provided as part of a show or scene statement.

The new `config.tag_zorder` makes it possible to specify a default zorder that's used for a tag when no other zorder is used.

### Easing Functions

Thanks to Nyaatrap, Ren'Py now supports Robert Penner's easing functions in ATL. These functions speed up and slow down interpolations (and in some cases, can cause interpolations to overshoot their targets), in order to provide more pleasing and natural motion.

The new easing functions are documented in the Warpers section.

### Side Images

New-style side image functionality (using images with the side tag) has been overhauled. It's now possible to apply an ATL transform, and hence a t ransition, whenever the side image changes. Different transforms can be used in the case where the character changes and the case where it stays the same.

See the Side Images section for complete documentation.

### PushMove Transitions

A new type of transition - `PushMove()` - has been added to Ren'Py, along with the `pushright` (or pushleft, pushtop, pushbottom)

### Other

Fixed a major bug where Ren'Py would put an extra space at the end of each text block. This could change the layout of text (and hence other portions of the interface.) The fix reverts the change that added the space, causing it to be smaller than in 6.99.7 (but the same size as 6.99.6 and before.)

Ren'Py now supports HighDPI ("retina") displays on the Windows platform, displaying text at the native screen resolution.

Ren'Py properly maximizes on most desktop platforms. (Everything Windows 7 and below, which have a start orb that can overlap the Ren'Py window.)

Added the `renpy.is_start_interact()`, which can be called in a per_interact method to determine if this is the first pass through an interaction (as opposed to a restarted interaction).

The new `renpy.maximum_framerate()` function increases the framerate Ren'Py draws at for a given period of time. Ren'Py's Steam support uses this to ensure the Steam overlay animates smoothly.

It's now possible to use the `config.default_music_volume`, `config.default_sfx_volume`, and `config.default_voice_volume` variables to set the default values of the various mixers.

The new `config.overlay_screens` variable takes a list of screens that are displayed whenever a pre-screens overlay would be displayed, and hidden otherwise. This makes it easy to have a screen as a permanent part of the in-game interface, even if the game can be entered from multiple places (like a Replay).

Ren'Py now clears focus (causing unhover events to trigger) when the mouse leaves the game window.

The hbox and vbox displayables now support the `xminimum` and `yminimum` style properties (and hence, `xsize`, :propref`ysize`, `xysize`, and :propref`area` properties.)

The new `PlayCharacterVoice()` action makes it possible to play a sample of a character's voice at that character's voice volume level.

The Extract Dialogue screen now includes a number of additional options.

The Traditional Chinese translation has been updated.

## Ren'Py 6.99.7

### Dynamic Images

Dynamic images have been added to Ren'Py. It's now possible to write code like:

    image eileen happy = "eileen [outfit] happy"

This code creates a displayable that interpolates the value of the `output` variable at least once per interaction. The interpolated string is then used to find another displayable to use.

Dynamic images can be used anywhere a displayable is expected, and the string can be an string that resolves to a displayable. One possible use might be to replace boring and repetitive condition switches in dress-up games with code like:

    image eileen dressup = LiveComposite(
        (300, 600),
        (0, 0), "eileen_base.png",
        (0, 0), "eileen_top_[top].png",
        (0, 0), "eileen_bottom_[bottom].png",
        (0, 0), "eileen_accessory_[accessory].png",
        )

Dynamic image can be used in a screen language add statement:

    for item in inventory:
        add "store_[item].png"

When so used, the variables are looked up in both the screen and global scopes.

### Define Improvements

The define statement can now be used to define config and persistent variables. The code:

    define config.screen_width = 1280
    define config.screen_height = 720

Now works as expected. Persistent variables work in an idiosyncratic way, as the code:

    define persistent.unlocked_endings = [ ]

Will only set the unlocked_endings variable if it has not already been set.

### Android/iOS

The android SELECT key - present on remote controls - is now supported for advancing text and selecting buttons, bars, etc. This means most TV-based android consoles should be supported.

Direct support for the OUYA console has been dropped. The console should still be supported as a general TV-based android console.

The new `config.save_on_mobile_background` and `config.quit_on_mobile_background` make it possible to adopt various strategies to deal with an Android or iOS app losing focus.

To help apps comply with an Apple policy on the purchase of money cheats, consumable in-app purchases have been added for iOS only.

### Other

Unknown gamepads can be calibrated from the shift+G menu.

The new `config.replace_text` callback makes it possible to replace text with other text. For example, one can replace multiple dashes with en-dash or em-dash characters.

If a screen named `skip_indicator` is present, it will be displayed instead of the default skip indicator.

In the launcher, pressing F5 will launch the current project.

Skipping is now disabled when leaving a Replay.

Creator-defined statements can now return statements to be predicted.

The Finnish and Traditional Chinese translations have been updated.

The new `adjust_spacing` style property has been added. It controls if the spacing of drawable-resolution text is adjusted to match the spacing of viewable-resolution text. Setting this to False can prevent kerning from changing after extend, but requires the GUI be designed to adjust to the changing text size. To prevent obvious artifacts, this is set to False for input text.

The following bugs have been fixed:

- A problem with script backups when the user has a non-ASCII username.
- If a screen was predicted with multiple arguments, that screen would only be predicted once for the purpose of image prediction.
- On Mac OS X, if the Ren'Py window was covered or offscreen, VSYNC would fail and CPU usage would rise to 100%. (Ren'Py now detects failed VSYNC and limits its own framerate.)
- Subsurfacing a clipped surface would not work, manifesting in incorrect rendering of scrollbars in several of the default themes.
- It was hard to pick a theme in the launcher.
- When a window was scaled, hyperlinks would react to the mouse in incorrect positions.
- Window show now used narrator to render the empty window. It also had problems with characters defined in the character namespace.
- Newlines surrounding certain text tags would not be rendered.
- Underlines could have small spaces in them when the window was scaled.
- Problems with the software renderer on various hardware.
- A problem where lint would not recognize an image name with reordered attributes in the scene statement.
- A crash when merging achievements from multiple instances of a game.
- Having multiple text blocks, all with at least one hyperlink, could cause hyperlinks to be higlighted incorrectly.
- Various documentation problems.

## Ren'Py 6.99.6

### HighDPI/Retina

Support for HighDPI/Retina displays has been added to Ren'Py. This support is automatically used when running on iOS or Mac OS X systems that have a retina display.

On all platforms, Ren'Py now renders text at the display resolution, rather than the resolution the game was set to. The result is that text remains sharp even when upscaled significantly. Creators should be aware that due to variability in character size and kerning, this can cause changes in text layout and word wrap as the window is scaled.

To get the greatest benefit from these changes, the included copy of DejaVuSans has been updated to version 2.35, and the DejaVuSans-Bold font has been added. The bold font will automatically be used when a bold version of DejaVuSans.ttf is requested.

### Gamepad

Ren'Py now uses the SDL2 controller API to support gamepads. This API provides a standardized mapping of controller buttons to something similar to an Xbox controller.

### Backups

Ren'Py will now automatically back up .rpy files that are part of changed games. These backups will be placed in the same system-specific location that save files are placed.

### Other Improvements

A new `achievement.sync()` function and `achievement.Sync` action have been added to Ren'Py. These synchronize achivements between local storage and other backends, such as Steam.

A major bug in scanning archive files has been fixed. This bug often manifested as an archived images/ directory not being scanned some, but potentially not all, of the time. We strongly recommend upgrading from 6.99.5 if your game uses and archives the images/ directory.

If a file is not found in the game directory, Ren'Py will search the images/ directory for that file. This behavior is controlled by the `config.search_path` variable.

Screens now take the style_group property, which was previously only allowed on displayable statements.

Screen language statements now take arguments and properties properties, which allows statement to be passed a list of additional positional arguments and a dict of additional properties, respectively.

The new `Color` class allows conversion between color spaces and other color-theory operations.

Ren'Py now supports a game/python-packages directory, which can be used with pure-python packages installed via pip. See the new First and Third Party Python Modules and Packages documentation for more details.

Renios now supports compiling for 32-bit simulators (for the iPhone 4 and 5).

The Korean and Russian translations have been improved.

A pause will now automatically end when auto-forward mode is enabled.

## Ren'Py 6.99.5

### Startup

Much work has been done to reduce Ren'Py's startup time, especially on mobile platforms such as Android and iOS. This was largely accomplished by caching the results of transforms, analyses, and code compilation so less work is done when the game is unchanged. To take full advantage of this, perform a 'Full Recompile' of your project from the front screen of the Ren'Py launcher.

The desktop presplash code has been rewritten to use pygame_sdl2, and is now also faster.

A new `config.minimum_presplash_time` has been added. This ensures that the desktop presplash, android presplash, and iOS launchscreen are displayed for at least a certain amount of time, making them more useful for branding purposes.

As part of this work, script_version.rpy and script_version.rpyc will no longer be added to packages. Instead, script_version.txt will be added. (This ensures that the script does not change as part of packaging.) In addition, bytecode.rpyb has been moved to the game/cache directory, where addditional cache files now join it.

### iOS

There have been a number of improvements to renios, some necessary to get Ren'Py games accepted on the Apple App Store. Nightly builds of 6.99.5 have been used to get multiple games accepted.

Renios has been upgraded to use SDL 2.0.4 rc1. This improves compatibility with iOS 8, and makes it possible to keep the launchscreen displayed until Ren'Py fully starts. As a result, support for the ios-presplash image is no longer necessary, and has been dropped.

### Other Improvements

A Simplified Chinese translation of the template game has been added, and the Korean and Arabic translations have been updated.

ATL has had an update event added. This event is called in rare (but possible) cases when a screen is re-created from scratch, such as after a load or when styles or translations are changed.

`SetMute()` and `ToggleMute()` actions have been added, along with a new "all mute" `Preferences()` that mutes all mixers.

Font hinting is now controllable using the `hinting` style property.

The `config.nearest_neighbor` variable configures Ren'Py to draw all images using nearest-neighbor interpolation by default, helping ensure that pixel art stays sharp when scaled up.

The new `renpy.predicting()` function returns true if Ren'Py is running a screen for prediction purposes.

The new `renpy.return_statement()` function is a python equivalent to the Ren'Py return statement.

The new `_dismiss_pause` and `_skipping` variables make it possible to control pauses and skipping on a line-by-line basis.

Canvas objects (returned by the Render.canvas() method) now have a get_surface() method that returns a pygame_sdl2 Surface that is in a format that can be used by Ren'Py. This surface can be manipulated by Pygame drawing operations.

The new `_get_voice_info()` function returns an object that contains information about the voicing associated with the currently-running say statement.

## Ren'Py 6.99.4

The Ren'Py script language now includes a new default statement. This statement sets a variable to a value a default value at game start or load, if a default statement has not set the value of the variable in the current game. This makes it possible to initialize saved variables near the relevant code, rather than all at once at label start.

Lint will now warn if a `define` or `default` statement redefines a Ren'Py or Python built-in name.

The screen language use statement now takes a block, which can be transcluded into a screen using the `transclude` statement. This makes it possible to use statements to "wrap" a block of screen language code.

The screen language also supports creator-defined statements, which are transformed into use statements. These make it possible to extend the screen language syntax.

The new Render.place() is available for use in creator-defined displayables. This method renders a displayable, then applies Ren'Py's layout algorthing to place that displayable within a containing rectangle.

Ren'Py now logs errors importing the steam module to log.txt.

Ren'Py now logs the duration of various parts of the init process to log.txt.

On mobile, Ren'Py will wait until the start of the first interaction before creating the main window. This prevents a black screen from being displayed for some time as Ren'Py starts.

There are a number of improvements to iOS support, to support passing Apple's package verification process.

The launcher now includes a button to retrieve logcat information from an Android device.

The launcher now checks that the version of rapt and renios match the version of Ren'Py proper.

### Fixes

Fixed a performance problem caused by failing to release the Global Interpreter Lock while waiting for event input. This could cause problems running various background threads, like the image preloader and autosave.

Ensured that screens are only analyzed once as the game starts. Previously, screens could be analyzed multiple times as the styles and languages were set, leading to excessive startup times, especially on mobile platforms.

The volume curve has been changed to be more correct and perceptually accurate. The previous curve had serveral problems, most notably that is sharply jumped from 0 to 10%. This may require players to adjust their volume settings.

The gallery slideshow timer now repeats through multiple images.

Text blits are now expanded to include an outline on a descender on the bottom row of text.

Drags outside of a draggroup can now be snapped into place.

The Gallery now properly advances through locked and unlocked images. Previously, this advancing was reversed, so next_unlocked would advance through locked and unlocked images.

Text accounts for the size of outlines when allocating textures, preventing the bottom line of outlines from being cut off.

Position information (xpos, ypos, etc.) are now passed from an inner transform to an outer transform during as single frame. Previously, this information would lag by a single frame, which could lead to nested transforms lagging or failing to complete.

## Ren'Py 6.99.3

Removed debugging code that could cause problems by writing an unnecessary zipfile.txt file.

## Ren'Py 6.99.2

Ren'Py now supports an images directory underneath the game directory. Images found inside this directory - or in subdirectories of this directory - will be automatically defined as images in Ren'Py. This will likely render the use of the image statement obsolete in simple games.

The new `AlphaMask()` displayable allows one displayable to be masked by the alpha channel of another.

The android and iOS emulators now emulate the onscreen keyboard.

The achievement API has been changed somewhat, but only with respect for progress functions. (Which were broken in the previous releases.)

Actions that care about the current screen (like SetScreenVariable) now work when used with the hovered and unhovered properties.

The updater has improved. If an incremental download fails, Ren'Py will try downloading the complete file before giving up.

When building for Android, Ren'Py will copy the apk files in to the dists directory used by the desktop platforms.

Added the `RestartStatement()` action.

Added the `renpy.reset_physical_size()` and `ui.screen_id()` functions.

Allowed the screen language key statement to take the activate_sound style property. This makes it easier to play a sound when a key is pressed.

Documented `ui.interact()`.

Updated the Simplified Chinese and Korean translations, and the Italian template.

## Ren'Py 6.99.1

Added the `renpy.load_image()`, `renpy.load_surface()`, and `renpy.get_showing_tags()` functions.

## Ren'Py 6.99

### SDL2

Ren'Py is now based on Pygame_SDL2, a reimplementation of the Pygame API based on the SDL2 library. One of the largest changes in Ren'Py's history, switching to SDL2 lays the groundwork for many improvements, in this and future releases.

### iOS Support

Ren'Py now supports the iOS platform. To develop for iOS, you will need a Macintosh computer, Xcode, and a paid membership in the iOS developer program. (An iPad or iPhone to test with is highly recommended.)

Ren'Py's iOS support includes the ability to create Xcode projects, and to update those projects with the latest version of a Ren'Py game. Xcode can be used to change project settings, and to create debug and release builds.

The iOS port supports iOS 7 and higher. Almost all of Ren'Py is supported, with the exception being that video playback is limited to fullscreen video in formats the iOS device supports.

For now, the default set of Ren'Py screens are not particularly compatible with iOS. You will need to customize your game to make it touch friendly and compliant with Apple's guidelines before submitting it to the iOS app store.

Please see the iOS documentation for more information and a copyright notice you must include as part of your app description on iOS.

### Android Support

Android support has been rewritten, and is now based in SDL2. This release brings Android support to parity with desktop platforms. Improvements include:

- Support for rotating the screen to match the user's preferred orientation.
- Improved in-app purchase support, with the ability to retrieve prices and create a single .apk that supports the Google and Amazon stores.
- Android audio playback is now based on the same code that's used on the desktop and iOS platforms. This enables support for features like panning and fading volume. It also means the same sound files can be used on Android, iOS, and desktop platforms.
- Keyboard input is now supported on Android.
- Languages requiring bidirectional text (like Arabic and Hebrew) are supported on Android.

A number of issues with Android support have been fixed, including one that prevented Ren'Py from unzipping the android SDK automatically when the path to the Ren'Py install was too long.

Please see the Android documentation for more information and a copyright notice that should be included as part of your app description.

### Steam

Ren'Py now ships with Python bindings for the steam API. These bindings are built as part of the Ren'Py build process, which means they will be maintained alongside Ren'Py going forwards.

For an explanation of how to use the Steam API, please contact the Ren'Py developers directly. The bindings make available:

- Initialization.
- User statistics and achievements.
- Retrieving other apps by the same developer that have been installed.
- DLC support.
- The in-game overlay, including the ability to launch a purchase flow.
- Session tickets.

The steam bindings will be integrated with Ren'Py as appropriate. For now, this integration consists of binding the steam achievement system to the new Ren'Py achievement API.

### Distribution Improvements

The launcher now has the ability to add from clauses to call statements, automatically turning:

    call dayplanner

into:

    call dayplanner from __call_dayplanner

From clauses, which are really labels, help Ren'Py to find the return site to use when a game is changed. This should help fix problem with games that may change greatly between releases.

When asked to package a game that is more than about 2GB in size, Ren'Py will produce a ZIP64-format archive. These archives may be less compatible that smaller zip files.

### Languages and Translations

There is now a Russian translation of the tutorial game, and a Finnish translation of the launcher.

Ren'Py supports input methods (IMEs) on platforms where SDL2 makes that support available. (All platforms except for Linux.) Input methods make it possible to input complex non-ASCII text, such as Chinese, Japanese, and Korean.

### Clipboard Voicing

Ren'Py now supports clipboard voicing, which is accessed by shift+C.

Clipboard voicing is a form of self-voicing that works by copying the text to the clipboard, where a screenreader program is likely to read it using settings preferred by the player.

### Custom Text Tags

Ren'Py snow supports a new form of custom text tags.

Custom text tags are applied after the text has been tokenized into tags and text. This makes it easier to write a custom text tag that manipulates text or applies multiple existing text tags to text.

The previously-existing form of custom text tag has been renamed to style text tag, and is still supported.

### Other Improvements

A high-level achievement API has been added to Ren'Py.

Ren'Py now includes support for recognizing touch gestures on Android and iOS.

It is possible to hide the editing buttons in the launcher, so they can't be used to open an absurd number of editor windows.

The developer can choose if strings should be empty when generating translations.

Three new set manipulation actions `AddToSet()`, `RemoveFromSet()`, and `ToggleSetMembership()` manipulate sets and lists-as-sets. (Such as inventory lists.)

Drags (as in, drag-and-drop) now support the focus_mask style property.

The complexity of the style system has been reduced, decreasing memory usage and startup time.

The new `renpy.suspend_rollback()` suspends the recording of rollback checkpoints, while still allowing rollback to occur.

The RENPY_GL_CHECK_ERRORS controlls the logging of OpenGL/ANGLE function calls and errors.

A completion progress indicator can be toggled by typing shift-alt-P or swiping up-down-left-right-left-right.

As of this release, dictionary and set comprehensions are wrapped to support rollback.

## Ren'Py 6.18.3

This release adds the showif statement to screen language. The showif statement shows and hides its children based on a condition. When its children are ATL transforms, showif delivers ATL events to manage the show and hide process.

Ren'Py's image prediction mechanism now models the return stack, and can predict images through a call and return pair. Previously, a call followed by a return would block image prediction.

Ren'Py now predicts that the start label will be called from the main menu. This will help to avoid unpredicted image loads at the very start of a game.

The ATL on statement now can take a comma-separated list of event names.

The new `updater.UpdateVersion()` function contacts an update server and determines if an update is available.

The new `renpy.invoke_in_thread()` function runs a function in a background thread, and restarts the interaction when that thread finishes.

While in self-voicing mode, the {w} and {p} tags are ignored.

The Traditional Chinese and Russian translations have been updated.

### Bug Fixes

Fixed a regression that could cause hiding transforms to skip time.

Fixed a bug that would cause the screen language if statement to show children from blocks with a false condition, if those child blocks were run during prediction.

Fixed an issue where SetScreenVariable and ToggleScreenVariable were declared as pure functions, but weren't. They now have been reimplemented as pure functions.

Fixed an issue where a grab could fail to transfer between interactions, leaving Ren'Py unresponsive.

## Ren'Py 6.18.2

The define statement can now take a store name, and the say statement will search the `character` store before searching the default store. This means that if one uses:

    define character.e = Character("Eileen")

Say statements like:

    e "Hello, world."

will continue to work, even though `e` has been freed up for other purposes.

The default image cache size (set in `config.image_cache_size`) has been increased from 8 to 16 screens worth of images.

When set to True, the new `crop_relative` transform property tells a Transform to interpret float components of its `crop` property relative to the width or height of its transformed child, as appropriate. For example, (0.5, 0.0, 0.5, 1.0) will cropout the lower-right quadrant of the child.

When set to false, the new `keyboard_focus` style property hides buttons, bars, and imagemap hotspots from the keyboard focus mechanism.

The Mousearea screen language statement now respects the `focus_mask` style property, making it possible to have non-rectangular mouseareas.

Ren'Py now includes functions that can be used to profile the memory consumption of a game, including the memory consumption of Ren'Py itself. These functions are `renpy.profile_memory()` and `renpy.diff_memory()`. The new `renpy.profile_rollback()` lets one more specifically see the memory consumption of the internal rollback log.

When self-voicing mode is enabled, Ren'Py displays a notification that explains how to disable self-voicing mode.

This release fixes a subtle bug caused by incorrect analysis of for loops in screen language screens, when the iteration variable is a constant. (For example, when the iteration variable is `define`ed somewhere else in the game.)

This release adds Traditional Chinese translations of the launcher and template game, contributed by Civalin.

## Ren'Py 6.18.1

This release includes a new `Placeholder()` displayable, which can be used to display placeholder characters. Placeholders are now used when displaying images that are not defined.

The new `sv` Character-like object can be used when self-voicing is enabled to display (and hence speak) descriptive text.

ATL transforms in screens now begin executing when first shown. Previously, ATL transforms began executing when the screen containing the ATL transform was first shown, which meant that if the transform changed over the course of screen display, a portion of the new transform would be skipped.

This release includes a German template contributed by NoJoker.

## Ren'Py 6.18

### Screen Language Improvements

This release includes a new implementation of screen language that has the potential to be much faster than the original implementation of screen language. Where the original screen language evaluated screens from scratch at the start of each interaction, this new implementation can incrementally reuse large portions of a screen between interactions. Please see the new Screen Language Optimization documentation for information on how to maximize screen language performance.

Of special note is that screens now perform better when defined with a parameter list. Screens that do not expect parameters should be defined with an empty parameter list.

To support improved optimization, when the screen language use statement calls a screen with a parameter list, only variables in that parameter list are updated. (This is a change in previously-undocumented behavior.)

Screens now support passing properties to a displayable from within an if statement, provided the if statement is the first thing inside the displayable. For example:

    text "Eileen":
         if eileen_mad:
             color "#fcc"
         else:
             color "#cfc"

now works.

As there is now a larger benefit from predicting screens, screen prediction has been improved in several ways:

- By default, Ren'Py will now use the arguments supplied to a screen in the `show screen` and `call screen` statements to predict the screen. This is potentially dangers, as it means that if either statement has side effects, those side effects will occur as part of screen prediction. To mitigate this problem, both statements now take a `nopredict` clause that prevents screen prediction.
- Ren'Py will now attempt to predict images inside if clauses that would not be taken, and will ignore errors that occur during statement prediction.
- A pair of functions, `renpy.start_predict_screen()` and `renpy.stop_predict_screen()` allows for manual prediction of time images that will be used by screens, including parameterized screens.

Ren'Py now supports profiling of screens, via the `renpy.profile_screen()` function.

Ren'Py has been changed to make a copy of the screens being displayed before a transition occurs. This makes it possible to use a transition to show screen updates. For example, one could increase the value displayed by a bar, and then use the dissolve transition to dissolve in the new segment of bar.

### Image Prediction

Ren'Py now has a supported mechanism for manually predicting images in cases where automatic image prediction fails. This mechanism consists of two functions: `renpy.start_predict()` starts prediction of images, while `renpy.stop_predict()` stops prediction.

### Accessibility

Ren'Py now includes support for self-voicing, a mode in which Ren'Py will read on-screen text to vision impaired players. To activate self-voicing, press the `v` key. For more information, please read the self-voicing documentation.

The new `alt` style property allows one to supply alternative text that allows Ren'Py to voice imagemap components and buttons with incomplete names.

The Ren'Py launcher now includes a large-text mode that can be accessed from the preferences page. This mode increases text size and contrast.

### Android In-App Purchasing

This version of Ren'Py includes a high-level interface that supports in-app purchasing on the Android platform. This interface currently support Google Play and the Amazon App Store.

### Pixel Art

Ren'Py supports nearest-neighbor filtering of images. This ensures that screen pixels correspond to a single texture pixel, which is the scaling mode preferred for use with pixel art. Nearest-neighbor mode is enabled with the new `nearest` transform property.

The new `config.adjust_view_size()` callback makes it possible to set the size of the Ren'Py viewport to something other than the size of the window (or screen, in fullscreen mode). For example, a game can use this callback to limit its viewport size to integer multiples of its native size.

### Voice Improvements

Voice volume is now adjustable on a per-character basis, using the voice_tag argument to `Character()` and the new `VoiceVolume()` value.

Using the new `config.emphasize_audio_channels` variable, Ren'Py can emphasize audio on some channels. This is doen by lowering the volume of non-emphasized channels when a emphasized channel is playing, and returning the volumes to normal when no emphasized chanels are playing. By setting this variable to `[ 'voice' ]`, the voice channel can be emphasized over music and other sounds,

### OS X Bug Workaround

To workaround a bug in Mac OS X 10.9, Ren'Py will now always open on the the primary monitor of a Macintosh.

### Other

With some limitations, non-ASCII characters can now be used as character names. Since Python code does not allow non-ASCII identifiers, such character names must be defined by the define statement, and used outside Python code.

The auto property of imagebuttons and imagemaps now can take image names as well as image filenames.

The new `renpy.image_exists()` function returns true if an image has been defined.

Gallery navigation can now be customized by customizing the `gallery_nav` screen.

The new `renpy.count_dialogue_blocks()` and `renpy.count_seen_dialogue_blocks()` return the total number of dialogue blocks and the number of dialogue blocks that have been seen by the current user in any game. With some caveats, these can provide an indication of how much of the game the user has seen.

The `config.autosave_on_choice` variable determines if Ren'Py will autosave on choice, while the `config.autosave_on_quit` variable determines if Ren'Py will autosave when the game is about to end (by quit, return, or loading a save slot).

The new `events` transform property determines if events are passed to a transform's children. This is useful for ATL transforms, when some children should not receive events.

Save dumps (enabled by `config.save_dump`) are performed before the save occurs, making them far more useful for debugging pickling problems.

When show_ arguments are past to an `NVLCharacter()`, the show_ prefix is stripped and those arguments are passed to the `nvl` screen.

### Translations

This release add an Italian translation of the launcher and template game, contributed by Oshi-Shinobu.

This release adds a Portuguese translation of the template game, contributed by Mrstalker.

This release adds a Simplified Chinese translation of the launcher, contributed by Huanxuantian.

## Ren'Py 6.17.7

This release includes a number of Android changes:

- RAPT has been updated to use the latest version of the SDK. Please install the SDK again if you have build problems.
- RAPT no longer includes a copy of Ren'Py. Instead, Ren'Py includes a copy of itself into the built game that RAPT uses. This makes it possible to include fixes to Ren'Py in an Android package.
- A low-level In-App Purchase implementation, contributed by Emmanuel Marty and Winter Wolves. The low-level IAP code supports Google Play and the Amazon App Store. This code is not currently documented, as it will be wrapped in a higher-level implementation.

This release includes a fix to an audio-video sync issue that affected the Windows, Mac OS X, and Linux platforms.

## Ren'Py 6.17.6

This release adds a German translation of the launcher, contributed by Marcel.

This release adds a Korean translation of the launcher and template game, contributed by Baekansi.

This release includes a workaround for an issue that could prevent the launcher from starting on certain Mac OS X computers.

## Ren'Py 6.17.5

### Translations

This release features an Arabic translation of the launcher and template game, contributed by Renoa.

The Japanese and Spanish translations have been updated.

### Changes

The traceback system has been changed to generally report script statements, rather than the functions Ren'Py uses to implement those statements.

The `renpy.pause()` function now only sets a checkpoint (allowing rollback) if the delay time is 0. This prevents rollback from being blocked by short pauses.

The new `renpy.queue_event()` function provides a way to queue Ren'Py events from user-written interface code. (For example, it could be used to listen to commands on a serial port that's connected to a custom controller.)

If set, RENPY_SKIP_MAIN_MENU and RENPY_SKIP_SPLASHSCREEN environment variables cause Ren'Py to skip the main menu and splashscreen, respectively.

The RENPY_TIMEWARP environment variable makes it possible to speedup and slow down time.

An experimental new autoreload system can be accessed by setting `config.autoreload` to True, then pressing shift+R to toggle automatic reloading.

### Fixes

A regression in 6.17.4 caused a major memory leak on shift+R. This has been fixed. Several other problems with shift+R have also been fixed.

An issue preventing transitions from working properly inside a restarted ATL transform has been fixed.

The --warp was documented incorrectly, and had stopped working. It's been repaired, and its documentation has been improved.

## Ren'Py 6.17.4

### Reloading

This release contains a complete rewrite of shift+R reloading.

The rewrite was necessary to eliminate several major memory leaks that were triggered by reloading.

### Android

Ren'Py has been updated to use the newest (at the time of release) versions of the Android SDK and Ant. This should fix build problems caused by the use of older versions.

Ren'Py now recognizes and supports the Amazon Fire TV device. When a Fire TV is detected, the "firetv" screen variant is selected. To support pushing games to this device, Ren'Py now supports connecting to Android devices via the Remote ADB protocol.

### Other

Fixed a problem that occurred when an interaction containing a MoveTransition was restarted.

Added support for imagemaps that are larger than the screen. This allows an imagemap to be placed inside a viewport.

It is now possible to select the layer used by the say, choice, and nvl choice screen. Please see `config.say_layer`, `config.choice_layer`, and `config.nvl_layer` statements.

The prediction of window and bar images has been improved.

## Ren'Py 6.17

### Styles

The style system, which makes it possible to configure the look of displayables, has been rewritten from scratch. The new code reduces the amount of time it takes to create a new style to a small fraction of the previous time. Since every displayable creates an associated style, this has the potential to lead to a substantial performance improvement.

This release also introduced a new style statement that can be used to define styles, in place of python code. (Of course, the older form remains fully supported.) Lengthy and redundant code like:

    init python:
        style.quick_button_text.set_parent('default')
        style.quick_button_text.size = 12
        style.quick_button_text.idle_color = "#8888"
        style.quick_button_text.hover_color = "#ccc"

can be replaced with:

    style quick_button_text is default:
        size 12
        idle_color "#8888"
        hover_color "#ccc"

Finally, the style inspector (accessed through shift+I) has been rewritten.

### Syntax Changes

In addition to the new style statement, there are four other syntax changes:

- The definition of a simple expression has been expanded. Simple expressions (which are used in ATL and the screen language, among other places) now encompass all Python expressions that do not include lambda or the ternary (... if ... else ...) operator.

  This means that code like:

      show logo:
          xpos 800 / 2

  is now legal. Previously, the expression had to be parenthesized.

- The new `show layer` statement allows one to apply a transform or ATL transform to an entire layer, using syntax like:

      show layer master at flip

  or:

      show layer master:
          xalign 0.5 yalign 0.5 rotate 180

- The new `window auto` statement makes it possible for Ren'Py to automatically show and hide the dialogue window. By default, it is shown before `say` statements, and hidden before `scene` statements, but this can be customized.

- The init statement has been extended so it can be combined with other statements. It's now possible to write "init 1 image = ...", "init -2 define name = ..." and so on.

### Translations

This release adds French and Russian template games and translations of the launcher.

### Android

It is no longer necessary to download RAPT (the Ren'Py Android Packaging Tool) separately from Ren'Py. As of this release, RAPT will be downloaded by the Ren'Py launcher when an Android build is requested, and will be updated by the Ren'Py updater.

Buttons may now have an alternate action that is triggered by longpress on Android and right-click on desktop computers.

This release fixes a bug in which Ren'Py would not save persistent data (including preferences) before being terminated by the Android system, and a regression that broke compatibility with some Android 2.3 systems.

### New and Changed Preferences

There are two new preferences accessible through the `Preferences()` function:

- "auto-forward after click" controls if auto-forward mode is stopped by a click.
- "show empty window" determines is if the "window show" and "window auto" statements will cause an empty window to be shown.

Neither of these is exposed as part of the default preferences screen, but both can be added by interested developers.

There is one changed preference:

- "display" now has an "any window" option, which restores a fullscreen Ren'Py to its prior windowed size.

### Other

`ShowMenu()` can now pass arguments to the screen it displays.

The input displayable now takes a pixel_width property, that limits the size of the input field it a certain number of pixels.

The `FileCurrentScreenshot()` function

The new `xsize`, `ysize`, and `xysize` style properties make it possible to directly set the size of a displayable.

The `focus_mask` style property can now take as an argument a callable that returns true when a displayable should be focused. If such a callable can be written, it may be much faster than the current method of determining pixel opacity.

Viewport now respects the xfill and yfill properties. The default viewport style sets these to true. Setting them to False will cause the viewport to shrink to fit its contents when those contents do not fill the entire viewport.

The new `renpy.get_image_bounds()` function retrieves the bounding box of an image that is being displayed, after all Transforms have been applied to it.

The new `renpy.retain_after_load()` can be used to retain data updated by a screen after the game is loaded.

The new `xsize`, `ysize`, and `xysize` style properties make it possible to directly set the size of resizable displayables.

Prediction of images with partial attributes and side images used in dialogue has been improved. Prediction of creator-defined statements now works as documented.

## Ren'Py 6.16.2

This release adds a Spanish translation of the launcher and the template game.

This release adds the new `renpy.get_mouse_pos()` function, which retrieves the mouse position if a mouse is supported.

## Ren'Py 6.16

### Android

Android support has now been integrated into the Ren'Py launcher. While for size reasons RAPT is still a separate download, once RAPT has been placed inside the Ren'Py directory, the launcher will allow you to:

- Install the Android SDK.
- Configure a project as an Android application.
- Build and Install the Android application.

The launcher can now launch Ren'Py in modes that simulate Android phones, tablets, and television-based consoles.

Ren'Py includes support for television-based Android consoles, such as the OUYA. It includes support for detecting the OUYA specifically, and choosing a variant as appropriate.

This release adds some video playback support to the Android port. While limited to full-screen video and codecs that the Android platform supports (which unfortunately have little overlap with desktop Ren'Py), this may be enough to enable cutscene movies.

Ren'Py now includes a new set of screen variants, with "large", "medium", and "small" reflecting the visual size of devices (televisions are considered to be small because they're far away), while "touch", "tv", and "pc" reflect the input devices involved.

Android now supports displaying vertical text.

### Save, Load, and Persistent Improvements

The low-level load/save API has been overhauled. It's now possible to access save slot information directly, instead of having to scan all save slots to find the one you want. New functions include `renpy.list_slots()`, `renpy.newest_slot()`, `renpy.slot_mtime()`, `renpy.slot_json()`, and `renpy.slot_screenshot()`.

At a higher level, there is a new `FileNewest()` function that's true for the newest save slot. `FilePageNext()` and `FilePagePrevious()` now support a wrap argument that causes them to wrap around a defined number of screens.

There is now support for adding arbitrary JSON information to save files. This allows per-save information (like the path you're on in a VN, date and amount of money in a sim, or party composition in an RPG) to be accessed from the save and load screens.

JSON information is created by `config.save_json_callbacks`, and can be accessed through the low-level `renpy.slot_json()` or high-level `FileJson()` functions.

When possible, Ren'Py now stores save files with the game, as well as in a user-global save directory. This means that if a Ren'Py game is placed on a USB drive or shared on a network, the saves will be available on multiple computers. (When save files are available in both places, the newest file wins.)

When a save file on a network share is updated, Ren'Py will automatically rescan the contents of that file, and restart the current interaction. (This will update the save and load screens, making the file available to be loaded.)

Ren'Py will no longer auto-save while at the main menu.

Persistent data is also stored in both locations. When the persistent data is not identical, it will be merged. By default, the most recently updated value for each field will be used. In some cases (for example, a set of endings the player has reached), this is not the correct behavior. The new `renpy.register_persistent()` can be used to register different merge behavior.

### Voice

This release adds support for playing voice without having to fill the script with voice statements. This support consists of two new pieces of functionality:

- The launcher contains a new "Extract Dialogue" function. This extracts the dialogue into a tab-delimited file. Each record includes the character, the dialogue text, the filename and line number, and a unique identifier for that line.
- The `config.auto_voice` variable is used to give a filename pattern that is formatted with the unique identifier. If a file with that filename exists, and no other voice file is being played, that file is used as the voice.

There are also several new voice-related preferences. The "voice sustain" preference determines if voice is sustained through multiple interactions. The "wait for voice" preference determines if auto-forward mode waits for the voice to finish before advancing.

### Image Gallery and Music Room

The image gallery now can display a navigation overlay with next, previous, slide show, and return buttons. The creator can choose if these buttons display the images associated with a single button, or advance between multiple buttons.

The Music Room includes the ability to play a random track, and to determine if the tracks are shuffled, looped, or if play is confined to a single selected track.

### Text Rendering

Ren'Py now renders portions of font characters that leave the character bounding box. This prevents text (especially hinted and anti-aliased text) from being cut off, but may lead to apparent placement problems for fonts with very inaccurate bounding boxes.

### Japanese Language

The Ren'Py launcher has been translated into Japanese. The language used by the launcher can be switched from the preferences screen.

There is now a Japanese language template game, which defaults to a Japanese font and has a translated interface.

Much of the documentation has been translated to Japanese. The Japanese translation can be found at:

> http://ja.renpy.org/doc/html/

### Documentation

The Ren'Py documentation has been improved. The following pages have been added or migrated from the old wiki-based documentation.

- Labels & Control Flow
- Python Statements
- Conditional Statements
- Audio
- Movie
- Persistent Data
- Creator-Defined Statements
- Character Callbacks
- File Access
- Environment Variables
- Reserved Names

Many other documentation pages have been improved and edited.

### Other

The default quick menu now includes rollback and fast skip functionality. (This functionality is contained in the template screens.rpy, and may need to be copied into your game.)

The default yes_no screen now answers no when the user right-clicks. (This functionality is contained in the template screens.rpy, and may need to be copied into your game.)

The fast skipping function now stops when it visits seen text.

The `build.destination` variable can be used to select the directory in which Ren'Py places files when building a distribution.

There is a new NullAction that can be used when one wants a button to be sensitive to hover and unhover, but not performing a useful action on click.

ConditionSwitch is now much faster.

Ren'Py will deal with files with insane timestamps by giving them the current time.

### Bugfixes

This release includes many bugfixes. Some of the more important are:

- A fix to a problem that would cause Ren'Py to restart the display when starting up on Windows. This could cause Ren'Py to spuriously detect a slow video card, and present the user with the appropriate error message.
- A fix to a problem where Ren'Py would fail to display the proper error message when python code containing non-ASCII characters fails to compile.

## Ren'Py 6.15.6

This release includes improvements for the Android platform:

- Assets are now read exclusively from the APK and expansion file.
- Logs and tracebacks are placed on external storage.
- Saves are placed on external storage, except when saves from older versions of Ren'Py exist.

The GL2 shaders Ren'Py uses have been simplified in the (usual) case where no clipping is occurring. This leads to a noticeable speed improvement on Android, and potentially other platforms as well.

An issue with Drag-and-drop has been fixed. Thanks go to Kinsman for contributing this fixe.

The `Skip()` action now triggers the skip indicator. It also supports a new fast parameter, which causes skipping to the next menu.

This release includes various minor changes to improve compatibility with very old Ren'Py games. (It now runs the Ren'Py 5 demo.)

## Ren'Py 6.15.5

This release adds two new features:

- The GL renderer now supports additive blending. This is enabled using the `additive` transform property in an ATL transform or use of the `Transform()` class. Additive blending will not work if the software renderer is in use, and it's up to creators to deal with that issue.
- The new `Flatten()` displayable combines multiple textures into a single texture. This can be used to prevent incorrect behavior when a displayable containing multiple overlapping textures (like a `LiveComposite()` is shown with an `alpha` between 0 and 1.

It also fixes the following issues:

- Whitespace is now skipped before default arguments, which previously caused parse errors in some cases.
- Ren'Py now sets the unix mode of files and directories in zip and tar files to 644 and 755 as appropriate. Prior versions of Ren'Py used 666 and 777 as the permissions, which lead to a security problem when the file was unpacked by a tool that didn't respect the user's umask. (Info-zip had this problem.)
- Auto-hinting for fonts is now enabled by default. This restores font rendering compatibility with prior releases.
- Ren'Py now builds with and requires the current version of libav. It should also work with current versions of ffmpeg when libav is available.
- The version of SDL distributed with Ren'Py has been patched to prevent multiple windows from showing up in the Window menu when entering and leaving fullscreen mode.

### Ren'Py 6.15.4

This release fixes a compile problem that prevented Ren'Py 6.14.x and Ren'Py 6.15.0-3 from running on most 64-bit Linux systems.

Image prediction has become more fine-grained, and can take place while the screen is animating.

The new `build.exclude_empty_directories` determines if empty directories are include or excluded from the distribution. It defaults to true, previously the default was platform-dependant.

## Ren'Py 6.15

### Translation Framework

Ren'Py now includes a comprehensive translation framework. This framework includes support for using a single language selection to change dialogue, menus and other interface text, images and files, styles and styles.

The dialogue translation support allows lines of dialogue to be split and combined at the translator's discretion. As most Ren'Py statements are allowed inside the new translation blocks, it's possible to use logic (like conditions) to tailor the translations to your language.

The launcher includes a new "Generate Translations" button, which - as part of a sanctioned translation where the full script is present - will generate empty translation files for a new language.

### Improved Japanese Support

Ren'Py 6.15 includes multiple changes to better support the Japanese language.

- The tutorial game has been translated to Japanese, with the language being selectable from the preferences menu.

  The tutorial was translated by Koichi Akabe.

- Support for vertical writing has been added to Ren'Py. Consisting of the `vertical` style property for text, and the new `box_reverse` property on hboxes, this support makes it possible to display dialogue, menus, and other text in a vertical orientation.

  Vertical text support was written by Koichi Akabe.

- The line-breaking algorithm has been updated to match Unicode 6.2. In addition, three new "languages" have been added. The new "japanese-strict", "japanese-normal", and "japanese-loose" languages (based on the line-break options in the CSS3 Text module) allow greater control of how Ren'Py breaks lines with small kana and other special characters.

  Linebreaking can be further tailored using the new `renpy.language_tailor()` function, which can change the linebreaking class of a character.

### Console

The new debug console makes it possible to interactively run Ren'Py script and Python statements, and immediately see the results. The console is available in developer mode or when `config.console` is True, and can be accessed by pressing shift+O.

The console can be used to:

- Jump to a label.
- Interactively try out Ren'Py script statements.
- Evaluate a python expression or statement to see the result.
- Trace python expressions as the game progresses.

The console was originally written by Shiz, C, and delta.

### Screen Parameters

Screens now take named parameters, similar to the way that labels and transforms take named parameters. It's now possible to write:

    screen top_text(s, size=36):
         text s xalign 0.5 size size

and:

    show screen top_text("It works!")

### Replay Gallery

Ren'Py now includes support for replaying scenes. A scene replay can be invoked from anywhere in Ren'Py (for example, from a main menu or game menus screen, even when the game has started). When the replay ends, Ren'Py will return to the location the replay was invoked from, even if that location is in a screen or in python code. Rollback works inside a replay, but saving and loading is disabled.

The `Replay()` action begins a replay. The `renpy.end_replay()` ends a replay if one is in progress, and is ignored otherwise.

### Voice Improvements

There have been several improvements to the voice playback system. The new `config.voice_filename_format` variable makes it possible to use only part of the filename in a voice statement. The new voice_tag parameter to `Character()`, in conjunction with the `SetVoiceMute()` and `ToggleVoiceMute()` actions, makes it possible to selectively mute particular characters' voices. The new `VoiceReplay()` action makes it possible to replay the current voice.

### Launcher Improvements

There were a few launcher improvements in this release.

- The files pane of the navigation page has a new button that allows the user to create a new script file.
- The launcher can generate translation templates, and can be translated using the translation framework.
- The Ren'Py launcher now has a small amount of support for skins. While the basic layout of the launcher remains fixed, skins allow the background images and colors to be changed. See the skin documentation for more details.

### Macintosh Changes

The Macintosh version of Ren'Py now requires a 64-bit capable processor, and Mac OS X 10.6 or newer.

### Packaging Improvements

The file layout of Ren'Py games has been somewhat altered. With the exception of small launcher programs, all platform-dependent binaries are under the lib/ directory. Ren'Py itself has now been placed in the renpy/ directory. The common/ directory has been moved to renpy/common/, as it's considered an integral part of Ren'Py.

Ren'Py now uses renamed but otherwise unmodified python binaries on all desktop platforms. (Previously, it used platform-specific binaries.) Portions of the library are shared between the desktop builds.

A running Ren'Py process on Linux will now be named after the game, rather than having python as a name.

### Other Changes

- Viewports now support edge scrolling, which scrolls the viewport when the mouse is within a a configurable distance of the viewport edge.
- Most keyboard keys now automatically repeat. The repeat rate is controlled by `config.key_repeat`.
- Side images can now be used with menus.
- The `config.enter_yesno_transition` and `config.exit_yesno_transition` variables make it possible to define a transition that is run when yes/no prompts appear and disappear, respectively.
- The viewport statement now supports edge scrolling - automatic scrolling when the mouse approaches the sides of the viewport.
- The new `transform_anchor` transform property makes the anchor the point around which a transform is scaled and rotated. (For example, it's now possible to rotate around the bottom-right corner of an image, rather than just its center.)
- The common directory has been moved to renpy/common, as it's part of Ren'Py. The giant 00screens.rpy file has been broken up into a large number of smaller files.
- The new `box_reverse` and `order_reverse` style properties allow the user to control the order in which children of vbox and hboxes are placed and drawn, respectively.
- The xoffset and yoffset transform properties now take floating point numbers, allowing more precise positioning if subpixel is true.
- The `child` style property of buttons is now exposed to the screen language.
- The new `config.enter_yesno_transition` and `config.exit_yesno_transition` variables allow a creator to supply transitions that are used upon entering and exiting yes/no prompts.
- The python decimal module is now included in the default builds of Ren'Py.

### Bugfixes

Among others, the following bugs were fixed:

- github bug37: A crash with LiveTile when sizes were not integers.
- github bug41: `renpy.loadable()` failed to search for files inside android packages.
- github bug42: The launcher can now run a game that's in a read-only directory.
- github bug45: Ren'Py would fail when the hiding of a screen caused a screen beneath it to be hidden.
- github bug46: A bug that prevented Ren'Py from evicting images from an over-full image cache, that manifested as a runaway memory leak.
- github bug50: Vertical bars would scroll with the left and right arrow keys; and bars would remain grabbed even if they were grabbed while leaving the screen, preventing further input.
- github bug51: The slow_done callback was not called after a rollback.
- github bug56, github bug57: `renpy.loadable()` now works with Android assets.
- github bug60: Fixed a bug that prevented {p} and {w} from working properly when followed immediately by a text tag.
- github bug61: Ren'Py no longer crashes when an end_game_transition is set and a screen uses a variable that is no longer defined when the game restarts.
- github bug65: Multiplying a rollback list by a number now always produces a rollback list.
- Editra should work better on Windows.
- It's now possible to `renpy.call()` a label that doesn't take parameters.
- Fixed an error handling failure when a style used by error handling was not buildable.
- Fixed an error handling failure when a python early block contained a syntax error.

## Ren'Py 6.14

### Ren'Py Launcher Rewrite

The Ren'Py launcher has been rewritten. Some of the improvements are:

- A new visual design by Doomfest of the Dischan visual novel team.

- The launcher now includes direct access to open the script and game directories, and common script files.

- The launcher includes Script Navigation support. Clicking the name of a label, define, transform, screen, or callable will open the editor to the location where that name is defined.

  Script navigation also provides access to individual script files.

- The launcher now supports one-click project building. Instead of using multiple steps to build a project, a single click will now cause the launcher to:

  - Read the build process configuration from the game script.
  - Build the archives needed.
  - Generate the archive and update files.

- The launcher can now use the Ren'Py updater to update Ren'Py, and to download editors.

### Editra & Text Editing

For most users, Ren'Py recommends the use of the Editra editor. We have developed an Editra plugin that communicates with the Ren'Py launcher and supports the editing of Ren'Py script.

While still in beta, Editra is a fast and light editor with good code editing support. Editra also includes a spell-checker that can be enabled, and applies to dialogue and other strings.

If Editra is selected by the user, and it is not installed, Ren'Py will automatically download it.

The jEdit editor remains supported, and is preferred for use with languages (like Chinese, Japanese, and Korean) that Editra doesn't support fully. If selected, Ren'Py will download jEdit automatically.

Ren'Py also supports editing files through system-specific file associations. (This support will not send the cursor to the correct line, however.)

### Ren'Py Web Updater

Ren'Py includes an updater that can update Ren'Py and individual Ren'Py games by downloading changes from a properly-configured web server with a small number of update files uploaded to it.

The updater uses zsync to download the minimal set of changes between the local files on disk and the files stored on the server. A single set of files on the server supports updating from all prior versions of a project.

Ren'Py includes a default updater interface that can be further configured by interested users.

### Transform Changes

This release changes the behavior of transforms to make them more correct and easier to use.

The xzoom and yzoom properties are now applied before, rotation. This means that the shape of the image will remain consistent as the image is rotated. Previously, the image to change shape as it was rotated.

The xzoom and yzoom properties may now be negative, with negative zoom values causing the images to be flipped. The positioning code now takes this into account, and positions a flipped image properly.

Thanks to Edwin for contributing these changes.

### Screen Language, Displayable, and Transition Enhancements

- The Textbutton and Label screen language statements now take properties prefixed with `text\_`. These properties have the text_ prefix stripped, and are then passed to the internal text displayable.
- The Viewport screen language statement now takes a scrollbars parameter. If given, scrollbars that manipulate the viewport are created.
- The Viewport screen language statement now takes xinitial and yinitial parameters. If given, these control the initial positioning of the viewport.
- A screen language block may now contain multiple has statements. Screen language widgets that take single children can now take a has statement.
- The input displayable now supports the use of the left and right arrow keys within the text. (Thanks to Edwin for this feature.)
- `MoveTransition()` has been rewritten. The new version now uses transforms to control the positioning of entering and leaving images, and can interpolate between the locations of moving images.

### Rollback Improvements

- The new `renpy.fix_rollback()` function allows the game to fix choices, even if they are made in rollback mode. The user can roll back and roll forward, but is restricted to making the choices he made the first time through the game.

  Thanks to Edwin for contributing fix_rollback.

- Rolling forward now works through a jump out of a `call screen` statement.

### Video Improvements

Ren'Py's video playback support has been partially rewritten to improve robustness, speed, and framerate stability. These improvements should reduce the number of frame drops Ren'Py performs, and should also prevent Ren'Py from locking up if too many frames are dropped.

Ren'Py now supports the WebM video format.

### Image Load Log

When `config.developer` is true, Ren'Py keeps an internal log of image loads.

This log can be access by showing the _image_load_log screen. This screen displays the name of an image file for a few seconds after that image has been loaded. The name is in white if the image was loaded by the image predictor, and pink if Ren'Py was unable to predict the image.

### File Actions and Functions

Two screen functions have been added, and two screen actions have been changed:

- The new `FileUsedSlots()` function returns a list of used file slots on the current page.
- The new `FileCurrentPage()` function returns the name of the current page.
- The `FileSave()` and `FileAction()` actions have been modified so that if the slot name is None, an unused slot based on the current time is used.

Taken together, these changes make it possible to create a list of save slots where the user is able to add new slots to the list.

### Multiple Store Support

Ren'Py now supports multiple stores - multiple namespaces in which python code can be run. Variables in these stores are saved, loaded, and rolled-back in the same way that variables in the default store are.

Stores are accessed by supplying an in-clause to a python block. For example:

    init python in stats:

        def reset():
            """
            Code to reset the statistics.
            """

User-created stores are placed into the "store" package, with the default store being the package itself. Names can be imported between packages.:

    init python:
        from store.stats import reset

    init python in stats:
        from store import ToggleField

Note that stores do not affect the order in which init python blocks are run. A name must be defined in a block before the one that imports that name.

### Platform Support and Library Updates

Linux support has been changed.

- The Linux platform supports the x86_64 CPU architecture in addition to the x86 architecture. The Ren'Py shell script will automatically determine the platform it is running on when it is launched.
- The Linux version is now linked against the libraries from the 2009-era Ubuntu 10.04 Lucid. (Previously, Ren'Py had been linked against 2006's Dapper.) Older versions of Linux are no longer supported.

Many libraries that Ren'Py depends on have been updated. Some of the changes that have occurred are:

- Python has been updated to version 2.7.3.
- Pygame has been updated to version 1.9.1.
- GLEW has been updated to version 1.7.0. This may fix OpenGL problems on some Linux systems.
- LibAV has been updated to version 0.7.6, and has been compiled with CPU detection enabled.

### Other Changes

- The `renpy.call()` function allows - with major and important caveats - a call to a Ren'Py label to begin from inside python code. Such a call immediately terminates the current statement.

- When an action is expected, nested lists of actions can be given. The lists are flattened and the action executed.

- Added the `OpenURL()` action, which opens a URL in a web browser.

- Added the `config.gl_resize` variable, which determines if the user can resize OpenGL windows.

- Ren'Py's handling of command line arguments has been rewritten. Most notably, lint is now invoked with the:

      renpy.sh <gamename> lint

  command. (Which also works with renpy.exe.)

- Ren'Py can now dump information about the game to a json file when starting up. The information dumped can assist other tools in providing launcher-like code navigation.

- The little-used remote control feature has been removed from Ren'Py.

- The `config.gl_resize` variable now controls resizing of a game running in GL mode.

- Documentation fixes (by SleepKirby and others).

- The NVL-Mode tutorial has been ported to Sphinx (by Apricotorange).

- Ren'Py now defaults to reporting errors with sound and music files when config.developer is True.

## Ren'Py 6.13.9

The new RAPT tool makes it far easier to package a Ren'Py game for Android. It can semi-automatically set up an Android build environment on your system, build a package, and install that package on your Android device.

To fix some editor-related problems, backported the 6.14 editor system. This changes how editors are configured. Please see Text Editor Integration for a description of the new system.

The new `config.save_dump` variable causes Ren'Py to write out save_dump.txt each time it saves. This file describes the contents of the save, making it possible to figure out what's causing an overly large save file.

Worked around a bug in Mesa that can cause crashes on certain Linux systems.

Fixed the following bugs in Ren'Py.

- The (default) texwrap layout represents character widths as floating-point numbers. This fixes a bug where non-integer kerning would lead to text overflowing its bounding box.
- Menu choices are logged correctly.
- All file access is now done in unicode, rather than the system's native encoding. This prevents crashes that occurred when Ren'Py was placed in a directory that had non-ASCII characters in it.
- Fixed focus_mask on the ANGLE renderer.
- Displayables can now have fractional-pixel sizes. This allows a zooming image to remain precisely centered on the screen.
- Fixed a problem where Ren'Py would save unnecessary trees of displayables each time it saved a screen. This would lead to overly large save files and slow save performance.
- Ren'Py would not attempt an alternate rendering method if the texture test failed, leading a "Textures are not rendering properly." exception.
- A crash in Render.fill.

## Ren'Py 6.13.8

Side images can now be limited to showing a single character, or only showing characters that are not on the screen. See `config.side_image_tag` and `config.side_image_only_not_showing`.

Added `config.python_callbacks`, a list of python functions that are called at the end of each python block.

Ren'Py now tests the video card it is running on for functionality. If it can't draw textured rectangles to the screen, it will proceed to a different renderer.

Old-style string interpolation is now enabled by default, alongside new-style string interpolation.

Ren'Py is now compatible with libpng 1.5. Thanks to James Broadhead for the patch.

Fixed the following bugs:

- A crash when dealing with certain invalid fonts.
- Pausing too long when typing out text.
- Cutting one pixel off a block of text when fractional kerning was used.
- Crashing when the time was set in the far future or past.
- Immediately exiting when rolling forward at the quit prompt.
- Crashing when a non-existing directory is added to the search path. (This prevented Katawa Shoujo from starting in the latest version.)
- Save-file size was overly large due to screens being included in save files.

## Ren'Py 6.13

### Text Rewrite

Text display has been rewritten from scratch. In addition to supporting many new features, the new implementation of Text is much faster at text layout and display, and contains much cleaner code.

Some of the new features that are now supported by the text display system are:

- Interpolation of variables enclosed in square brackets. It's now possible to write code like:

      "You scored [score] out of a possible [max_score] points."

  The new string interpolation takes place on all text that is displayed, rather than just say and menu statements. When used as part of a screen, interpolation has access to screen-local variables.

  PEP 3101-style string formatting is supported, which means that this syntax can be used to display fields and items, as well as variables.

- Kerning support was added, both as the `kerning` style property and the `k` text tag.

- Support for ruby text (also known as furigana), via the `rt` and `rb` text tags, and the `ruby_style` style property.

- The new `space` and `vspace` text tags make it easy to whitespace into the text.

- The new `cps` text tag controls the speed of text display.

- By default, Ren'Py uses the unicode linebreaking algorithm to find points at which a line can be broken. This algorithm should correctly break lines that contain a mix of western and eastern languages. Since that algorithm is incorrect on some Korean texts, Ren'Py also implements a korean-with-spaces variant, that only breaks runs of Korean text at whitespace. These algorithms can be selected by the `language` style property.

- Ren'Py now uses the Knuth-Plass linebreaking algorithm to choose the points at which it actually splits lines. This algorithm attempts to minimize the unevenness of all lines except the last. Ren'Py also supports a nobreak mode, which allows one to create a Text larger than the screen without it being automatically wrapped. These can be selected using the `layout` style property.

- The new `newline_indent` style property determines if Ren'Py adds indentation after a newline in text.

- The new `line_leading` style property inserts space above a line of text. (Ruby text can be placed into this space.)

- Text can be automatically translated before it is displayed. (This support will be improved in a future major release.)

### DirectX Support

On Windows systems that have the February 2010 DirectX update installed, Ren'Py will use DirectX via the ANGLE adaptation layer, if OpenGL 2.0 or later is not found. The ANGLE layer is used by popular web browsers such as Firefox and Google Chrome. This allows hardware rendering to be used on netbooks, where drivers often support DirectX far better than OpenGL.

At startup, Ren'Py will test the graphics capabilities of the computer it is running on. If the software render is being used, or the game renders at an unacceptably slow speed, Ren'Py will display a warning message to the user. The warning message includes a link to a page on renpy.org that explains how to update the graphics drivers.

This version of Ren'Py will only use the software renderer if both DirectX and OpenGL are incapable of rendering Ren'Py games. Screen-scaling in the software renderer has been replaced by a simpler but slower version.

### Other Changes

- Ren'Py now includes a style preference system. This system allows styles to be changed after the init phase has finished. These changes are saved with the persistent data. Among other things, style preferences allow a game to offer the user the option to change the font, size, and color of dialogue text.

- Support has been added for screen-based image galleries and music rooms. This support consists of a classes that provides actions that make it easy to present the user with graphics and music. The creator is responsible for creating screens that use the supplied actions.

- The default screens.rpy file, used when a new game is created, contains support for a "quick menu". This menu adds buttons to screens that allow the user to quick save, quick load, save, toggle skipping, toggle auto-forward mode, and access the preferences menu.

- Ren'Py includes 5 new themes, and a number of new color schemes.

- Several new actions have been added. The `SelectedIf()` action allows the creator to control if a button is displayed in the selected state. The `SetMixer()` action allows a mixer to be set to a specific value. The `Rollback()` and `RollForward()` actions allow the creator to bind rollback to buttons.

- The behavior of the xfill and yfill style properties was accidentally changed in the 6.12 series. It has been returned to the historical behavior.

- The `Dissolve()` and `ImageDissolve()` transitions now take a time_warp parameter.

- The `Frame()` displayable now allows the user to specify the left, top, right, and bottom borders independently.

- The `caret` style property allows the user to customize the caret of an input widget.

- The `renpy.displayable()` function has been exposed to the user.

- Timers can now take a list of actions, rather than just a single callable.

- Three transforms were added to the default library: `top`, `topleft`, and `topright`.

- Ren'Py can now load files (including images, music, and fonts) from an Android package.

- User-defined statements can now take a block, which the statement is responsible for parsing.

- Wrote documentation for:

  - Menus
  - Transforms
  - Creator-Defined Displayables

  Several indexes were added to the documentation, and the style was updated.

- Ren'Py now uses the libjpeg-turbo library, for faster jpeg loading. Ren'Py now uses libav 0.7.1, for improved compatibility with movie formats.

- Removed support for the iLiad platform.

- PowerPC support has been removed from the main Ren'Py distribution. It's available as a download from the Ren'Py web site.

Thanks to Aleema for contributing the new themes and color schemes.

## Ren'Py 6.12.2

This release contains the following changes:

- ATL Transforms with parameters compile correctly.
- MultipleTransition works in conjunction with pauses.
- The mouse is shown when a quit action is run while a movie is playing.
- A fix for a lockup that occurred when the user entered the game menu while a transition was running.
- RENPY_SCALE_FAST works again.
- Ren'Py compiles with newer versions of ffmpeg.
- Skipping ends when the game restarts.
- Fixed a problem with texture upload that made games noticeably slower.
- Choose a better default size for windows on small monitors, like netbooks.
- xfill and yfill now work for vbox and hbox, respectively.
- Click-to-continue fixes.
- Side image fixes.
- Documentation fixes.

Thanks to David Gowers and zhangning for contributing patches to this release.

## Ren'Py 6.12.1

### Image Attributes

The process of showing images is now attribute-based. Image names now consist of a tag, and zero or more attributes. When showing an image, the order of attributes is no longer important - it's now possible to define an image using one set of attributes, and show it using those attributes in a different order.

Attributes are also "sticky". This means that we attempt to preserve as many attributes as possible when showing a new image.

For example, say we had the following images:

    image eileen beach happy = "eileen_beach_happy.png"
    image eileen beach woozy = "eileen_beach_woozy.png"

We can now show the first image using the command:

    show eileen happy beach

Since the order of attributes no longer matters, this will show the "eileen beach happy" image. If we follow this with the show statement:

    show eileen woozy

the image "eileen beach woozy" will be shown. (Assuming no other images exist. If the image "eileen happy woozy" existed, an ambiguity error would occur.)

When an image tag is shown without any attributes, then the current attributes are retained. Now, one can write:

    show eileen at right

to display Eileen on the right side of the screen, without changing the attributes supplied to an image.

Say Attributes. Image attributes can be updated as part of a say statement. A character can be given an image argument, giving the name of an image that character is linked to. As part of the say statement, image attributes can be given before the dialogue string. These attributes are given to the linked image.

For example, if we define a character using the code:

    define e = Character('Eileen', image="eileen")

the code:

    e woozy "I think I'm getting too much sun."

is equivalent to:

    show eileen woozy
    e "I think I'm getting too much sun."

whenever an image with the tag eileen is being shown.

Side Image. This release features a new implementation of Side Images, which allows side images to be defined like other images, and allows side images to be integrated with screens easily.

Sticky Transforms. Finally, showing an image without providing a transform or ATL block will now continue the previous transform that an image with that tag was using. Previously, it caused those transforms to stop.

### Error Handling

Ren'Py now has a new exception handing framework. Instead of always crashing when an error occurs, Ren'Py will now display the error message on the screen, and give the user the following choices, as appropriate to the situation:

- Rollback
- Reload
- Ignore
- Open Traceback
- Quit

When an editor is defined, Ren'Py will allow the user to click on a filename and line number to open that line in the editor.

The framework is used to handle exceptions and parse errors.

### Other

When in OpenGL mode, Ren'Py now remembers the window size between sessions. (This can be disabled using `config.save_physical_size`, and it may make sense to do so if your game is using the pre-screen preferences system.) Choosing the "Window" display preference now resizes the window to 100% of normal size.

Added the `xcenter` and `ycenter` position and transform properties. These set the position of the center of a displayable.

The `renpy.vibrate()` function allows Ren'Py to ask Android devices to vibrate.

The hyperlink style, callback, and focus functions have now been moved to the `hyperlink_functions` style property. This allows the functions to be changed on a per-style basis.

Indentation errors are now reported on the indented line, and not the line preceding the erroneous indentation.

Added the `SetScreenVariable()` and `ToggleScreenVariable()` actions. These allow screen-local variables to be changed.

Ren'Py now attempts to elide personal information from filenames. Where possible, filenames are reported relative to the base or Ren'Py base directories, rather than the root of the filesystem.

The new `box_wrap` style property allows hboxes and vboxes to automatically wrap when they reach the edge of their enclosing area.

Actions now can have an `Action.unhovered()` method. This method is called when an action supplied as a hovered parameter loses focus.

Added the `Tooltip` class, which makes it easier to define tooltips as part of a screen.

Added `config.debug_text_overflow`, which controls the logging of cases where text exceeds its allocated area.

Ren'Py no longer attempts to adjust the system level mixer controls, which means that it's no longer possible to raise the volume from within Ren'Py. Controlling the system volume exhibited bugs on all three platforms, including hard-to-predict volume changes that affect other applications.

Along with the new features, transitions have been documented in the new manual.

Archives are now automatically detected in asciibetical order. See the documentation for `config.archives` for more details.

Bug fixes:

- launchpad bug 734137 - Timers do not participate in rollback.
- launchpad bug 735187 - Ren'Py get stuck when using {nw}. (Thanks to Franck_v for tracking this down.)

## Ren'Py 6.12.0

### Android Support

Ren'Py now supports the Android platform. This includes support for a large fraction of Ren'Py's functionality, although we were unable to add support for imagedissolves and movie playback. It should be possible to package a Ren'Py game and distribute it through the Android market.

Android support required several changes in Ren'Py:

- The OpenGL renderer has been extended to support OpenGL ES.
- For performance reasons, much of the display system has been rewritten in the Cython language. This also should improve performance on other platforms.
- Support was added for the Android lifecycle. Ren'Py automatically saves when the android device suspends, and reloads (if necessary) upon resume.
- We added the concept of Screen Variants. This allows a single game to have multiple interfaces - such a mouse interface for computer platforms, and a touch interface for Android-based smartphones and tablets.
- We built a system that allows one to package a game separately from Ren'Py. This allows one to build packages without having to set up the Android NDK (you'll still need the Android SDK, Java, Python, Ant, and a lot of patience).

### New Widgets and Displayables

Added the SpriteManager displayable. This provides a high-performance way of drawing many similar sprites to the screen. This can scale to hundreds of particles, provided those particles are mostly similar to each other.

Added the Mousearea widget. A mousearea allows hovered and unhovered callbacks to occur when the mouse enters and leaves an area of the screen. Since it doesn't participate in the focus system, a mousearea can include buttons and bars.

Added Drag and Drop widgets and displayables. The drag and drop system can support:

- Windows being repositioned by the user.
- Card games.
- Inventory systems.
- Drag-to-reorder systems.

### Image Prediction

Ren'Py is now better at predicting image usage. Along with predicting images used by normal gameplay, it now attempts to predict images that are used by screens one click away from the user. For example, during normal gameplay, it will predict images on the first screen of the game menu. While at the game menu, it will predict the other screens of the game menu, and also the images the user will see when returning to the main menu. This prediction is automatic, but only occurs when using screens.

Screens may be invoked at any time, in order to allow for image prediction, unless they have a predict property of False. This means that displaying a screen should not have side effects. (Most screens only have side effects when a button is clicked or a bar changed - that's still fine.)

Ren'Py now supports hotspot caching for screen language imagemaps. When `config.developer` is true, Ren'Py will write a PNG file in the game/cache/ directory containing image data for each of the hotspots in the imagemap. If the cache file exists (regardless of the config.developer setting) it will be loaded instead of loading the hotspot images. As the cache file is often much smaller than the size of the hotspot images, it will load faster and reduce image cache pressure, improving game performance. This behavior only applies to screen language imagemaps, and can be disabled with `config.imagemap_cache`.

This should remove most of the need for `renpy.cache_pin()`. While not an error, the use of cache pinning can cause unnecessary memory usage when the wrong image is loaded.

### Screens

Ren'Py now ships with a default set of screens, which are used by the demo and installed by default when a new game is created. You can find them in template/game/screens.rpy, and they can be used by copying that file into your project. These screens are not 100% compatible with the previous layout system - for example, some styles have changed. That's why games must opt-in to them.

The definition of the items parameter of the Choice and NVL screens has changed, and games will need to be updated to work with the new version.

Character arguments beginning with `show_` are passed to the Say screen. This allows things like show_side_image and show_two_window to work with screens. The screens we ship support these options.

The new `config.imagemap_auto_function` variable allows the game-maker to control the interpretation of the `auto` property of imagemaps and imagebuttons.

The imagemap caching behavior described above applies only to screens.

The `FilePageName()` and `FileSlotName()` functions make it easier to name slots

### Other Improvements

Ren'Py 6.12 includes a number of other improvements:

- We've continued writing the new manual. Notably, we have rewritten the documentation for displayables.
- When taking a screenshot, `config.screenshot_callback` is called. The default implementation of this function notifies the user of the location of the screenshot.
- The `Solid()` and `Frame()` displayables are now tiny and no longer take up (much) space in the image cache.
- We now create a log.txt file, which replaces the old opengl.txt, and can log other subsystems.
- Several missing properties have been added to the screen language.
- Ren'Py now treats filenames as if they were case-insensitive. This means that filename mismatches on Linux should no longer be a problem.

### Bug Fixes

- launchpad bug 680266 - Ensures that dynamic displayables update before Transforms that use them.
- launchpad bug 683412 - Do not crash if a shader fails to compile.
- Fixed a bug that caused Ren'Py to crash when the system volume was lowered to 0, but not muted.
- Fixed a bug that prevented `Render.canvas()` from working with the OpenGL renderer.

## Ren'Py 6.11.2

### New Features

This release includes four new themes, generously contributed by Aleema. You can see and change to these new themes by clicking the "Choose Theme" button in the launcher.

### Software Update

The jEdit text editor included with Ren'Py has been updated to version 4.3.2, a supported version that should be able to run most plugins.

### Behavior Changes

The maximum default physical size of the Ren'Py window is now 102 pixels smaller than the height of the screen. This should prevent Ren'Py from creating windows that can't be resized since they are much bigger than the screen.

Buttons now only pass key events to their children when they are focused. This allows a screen language key statement to be used as the child of a button, and only activate when the button is focused.

MoveTransition was rewritten to correctly deal with cases in which images changed their order. This may lead to differences in behavior from the old version, where the ordering was undefined.

### Bug fixes

Fixed launchpad bug 647686, a regression that prevented sounds from looping properly.

Fixed launchpad bug 661983, which caused insensitive hotspots to default to the idle, rather than ground, image when no insensitive image was supplied.

Fixed launchpad bug 647324, where ImageDissolves are rendered as if specified with alpha=True whether or not alpha=True was set.

Fixed a problem that caused the game to start when picking "No" after clicking the (window-level) quit button.

Fixed a problem that prevented AnimatedValue from functioning properly when delay was not 1.0. Thanks to Scout for the fix.

Fixed a problem that caused movies to display incorrectly when the screen was scaled using OpenGL scaling.

## Ren'Py 6.11.1

### New Features

Add the `AlphaBlend()` displayable and the `AlphaDissolve()` transition. These take two displayables, and use the alpha channel of a third displayable to blend them together. (The third displayable is often an animation, allowing the effect to change over time.)

The new Modes system allows one to invoke callbacks when switching from one type of interaction to another. This can be used, for example, to automatically hide the window before transitions.

Imagemaps created using the screen language now only have a size equal to that of their ground image. (Previously, they took up the entire screen.) This change makes it easier to position an imagemap at a different location on screen, such as the bottom.

Imagemaps now take an alpha argument. If true (the default), hotspots are only focused if the mouse is over a non-transparent part of the idle or hover image. If set to false, the hotspot is focused whenever the mouse is within its boundaries.

Added the `renpy.focus_coordinates()` function, which returns the coordinates of the currently focused displayable, when possible.

The new `renpy.notify()` function and `Notify()` action make it simple to flash small status messages on the screen, such as might be used to notify the user of a completed quicksave or screenshot.

The new `HideInterface()` action allows the interface to temporarily be hidden, as a screen language action.

The developer menu now includes a command that will list all the files in the game directory.

The urllib and urllib2 modules from the Python standard library are now distributed as part of Ren'Py. These modules allow data to be retrieved from web servers.

The launcher now includes an experimental updater, that makes it easier to update to the latest pre-release. Hitting shift+U at the launcher's main screen will cause Ren'Py to be updated.

### Fixes

`MoveTransition()` now respects the xoffset and yoffset parameters.

Fixed several bugs with screen-language imagemaps.

Fixed a bug (#626303) that was caused by an incorrect texture unit check. Thanks to tmrwiz for the fix.

Transforms no longer cause a divide by zero exception when the zoom, xzoom, or yzoom properties are 0.

Clockwise and counterclockwise revolution in transforms now works.

Fixed a bug with scaling, that occurred when switching between the scaled software and GL renderers.

Hidden screens are no longer considered when assigning default focus.

FieldValues with max_is_zero set to True now work properly. Thanks to SleepKirby for the fix.

## Ren'Py 6.11.0

### OpenGL Support

Ren'Py will now take advantage of a computer's OpenGL hardware acceleration, if supported. This OpenGL support has several user-visible changes:

- The window containing a Ren'Py game can be resized or maximized, using standard window controls. When the window's aspect ratio does not match the game's aspect ratio, black bars will be added.
- Displaying in full-screen mode should not change the monitor's resolution. This will prevent the game from being distorted when displayed on a monitor with a different aspect ratio.
- Unless disabled in the video driver configuration, Ren'Py will use vertical blank synchronization, eliminating image tearing.
- GPU rendering is used, which should make drawing the screen faster in most circumstances.

Software rendering is still supported, and Ren'Py will automatically fall back to software rendering if it detects an improperly configured video card.

You can test that Ren'Py is in OpenGL mode by attempting to resize the window. If it's resizable, it's OpenGL, otherwise, software rendering is being used.

### Screens and Screen Language

This release introduces a new screen system, which allows one to use the new screen language to declaratively specify portions of the user interface. The screen language supersedes layouts, overlay functions, imagemaps, and most other means of customizing the out-of-game menus and the in-game screens.

The previous way of customizing the behavior of the game menu, the layout system, had problems, especially when using imagemap layouts. Screens were single-purpose, and it would be difficult to (for example) load a quick-save game from the main menu, without extensive Python code.

The screen system addresses this by providing a pool of functionality, in the form of Actions and BarValues. This makes it possible to pick and choose functionality, and add it to screens as is deemed necessary.

### Transform Changes

- 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.

- The new config.default_transform variable allows a transform to specify the initial transform properties of an image that does not have a more specific transform applied to it. Its default value is center, a transform that shows the image at the center-bottom of the screen.

  This can lead to a behavior change. When an image is shown, and then shown transforms, the transform will be initialized to the bottom center of the screen, not the top-left. The reset transform can be used to reset the position to the top-left.

- Transform (and ui.transform) have been changed so that their arguments can now be prefixed with a style prefix. One can write ui.transform(idle_rotate=30, hover_rotate=90) and have it work.

- Added the rotate_pad transform property, which controls how Transform pads rotated displayables. When set to False, _not_ the default, it's now possible to rotate a (100, 50) displayable by 90 degrees, and have the result be (50, 100) in size.

### Other Changes

- The Ren'Py documentation is in the process of being rewritten. This changelog is now being maintained as part of the Ren'Py documentation.

- Added support for composite style properties, that allow several style properties to be set using a single parameter. The new composite style properties are:

  - pos - takes a pair, and uses it to set xpos and ypos.
  - anchor - takes a pair, and uses it to set xanchor and yanchor.
  - align - takes a pair, and uses it to set xalign and yalign. (And hence xpos, ypos, xanchor, and yanchor.)
  - area - take (x, y, height, width) pair, and tries to set properties such that the displayable will be placed inside the rectangle. This sets the xpos, ypos, xanchor, yanchor, xfill, yfill, xminimum, yminimum, xmaximum, and ymaximum properties.

- ui.add can now take transform properties as keyword arguments. If at least one transform property is present, ui.add will create a transform that wraps the displayable it's adding to the screen.

- The new `LiveTile()` displayable tiles its child, without consuming a large amount of memory to do so.

- `config.quit_action` allows one to specify an action that is run when the quit button (in the corner of the window) is pressed. config.game_menu_action allows one to specify an action that is run when entering the game menu.

- The `config.screenshot_crop` configuration variable controls the area of the screen that it stored when the user presses the screenshot key.

- The `renpy.music.register_channel()` method now has two additional parameters, file_prefix and file_suffix. These are prepended and appended to filenames provided to the registered channel, respectively.

- The new `renpy.list_files()` method returns a list of files in the game directory and archives. This can be used to write your own automatic image loading method, among other things.

- The interaction between Character and Text has been rewritten to ensure that text is only tokenized once. This required changing a few of the methods on ADVCharacter and NVLCharacter, so code that inherits from those classes should be checked.

- The distribution code has been moved into launcher/distribute.py. This file can be run from the command line to build distributions in shell scripts and other automated processes.

- When there are transparent areas on the screen, and `config.developer` is true, the transparent areas are filled with a checkerboard pattern.

- The new `input`, `side`, `grid`, and `fixed` styles were created, and the corresponding displayables use them by default.

- When a style is accessed at init-time, and doesn't exist, we divide it into two parts at the first underscore. If the second part corresponds to an existing style, we create a new style instead of causing an error.

- The python compiler has been rewritten to use the python ast module. This should both improve performance, and improve error handling for python syntax.

  Because of this change, Ren'Py now ships with and requires Python 2.6.

- The following numbered bugs were fixed:

  - 520276 - ctc does not appear when cps interrupted
  - 526297 - im.Rotozoom()s crash when Ren'Py is scaled down. (Thanks to Spiky Caterpillar for the bug report and fix.)
  - 543785 - Launcher bug on select Projects Directory
  - 583112 - rollback while a movie displayable is shown leaves a video frame onscreen
  - 595532 - Wrong text in tutorial game. (Thanks to Viliam Búr.)

- The following other bugs were fixed:

  - Renamed the internal show and hide methods of Displayable, so those names can once again be used by user-defined displayables.
  - Rewrote MultipleTransition (which is used by Fade) to fix some problems it was exhibiting.
  - Take the condition parameter to Character into account when determining if an nvl clear occurs before the next interaction.

## Older Changelogs

Older changelogs can be found at:

> http://www.renpy.org/dl/6.10.2/CHANGELOG.txt

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